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chartparser_app.html
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chartparser_app.html
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<h1>Source code for nltk.app.chartparser_app</h1><div class="highlight"><pre>
<span></span><span class="c1"># Natural Language Toolkit: Chart Parser Application</span>
<span class="c1">#</span>
<span class="c1"># Copyright (C) 2001-2022 NLTK Project</span>
<span class="c1"># Author: Edward Loper <edloper@gmail.com></span>
<span class="c1"># Jean Mark Gawron <gawron@mail.sdsu.edu></span>
<span class="c1"># Steven Bird <stevenbird1@gmail.com></span>
<span class="c1"># URL: <https://www.nltk.org/></span>
<span class="c1"># For license information, see LICENSE.TXT</span>
<span class="sd">"""</span>
<span class="sd">A graphical tool for exploring chart parsing.</span>
<span class="sd">Chart parsing is a flexible parsing algorithm that uses a data</span>
<span class="sd">structure called a "chart" to record hypotheses about syntactic</span>
<span class="sd">constituents. Each hypothesis is represented by a single "edge" on</span>
<span class="sd">the chart. A set of "chart rules" determine when new edges can be</span>
<span class="sd">added to the chart. This set of rules controls the overall behavior</span>
<span class="sd">of the parser (e.g. whether it parses top-down or bottom-up).</span>
<span class="sd">The chart parsing tool demonstrates the process of parsing a single</span>
<span class="sd">sentence, with a given grammar and lexicon. Its display is divided</span>
<span class="sd">into three sections: the bottom section displays the chart; the middle</span>
<span class="sd">section displays the sentence; and the top section displays the</span>
<span class="sd">partial syntax tree corresponding to the selected edge. Buttons along</span>
<span class="sd">the bottom of the window are used to control the execution of the</span>
<span class="sd">algorithm.</span>
<span class="sd">The chart parsing tool allows for flexible control of the parsing</span>
<span class="sd">algorithm. At each step of the algorithm, you can select which rule</span>
<span class="sd">or strategy you wish to apply. This allows you to experiment with</span>
<span class="sd">mixing different strategies (e.g. top-down and bottom-up). You can</span>
<span class="sd">exercise fine-grained control over the algorithm by selecting which</span>
<span class="sd">edge you wish to apply a rule to.</span>
<span class="sd">"""</span>
<span class="c1"># At some point, we should rewrite this tool to use the new canvas</span>
<span class="c1"># widget system.</span>
<span class="kn">import</span> <span class="nn">os.path</span>
<span class="kn">import</span> <span class="nn">pickle</span>
<span class="kn">from</span> <span class="nn">tkinter</span> <span class="kn">import</span> <span class="p">(</span>
<span class="n">Button</span><span class="p">,</span>
<span class="n">Canvas</span><span class="p">,</span>
<span class="n">Checkbutton</span><span class="p">,</span>
<span class="n">Frame</span><span class="p">,</span>
<span class="n">IntVar</span><span class="p">,</span>
<span class="n">Label</span><span class="p">,</span>
<span class="n">Menu</span><span class="p">,</span>
<span class="n">Scrollbar</span><span class="p">,</span>
<span class="n">Tk</span><span class="p">,</span>
<span class="n">Toplevel</span><span class="p">,</span>
<span class="p">)</span>
<span class="kn">from</span> <span class="nn">tkinter.filedialog</span> <span class="kn">import</span> <span class="n">askopenfilename</span><span class="p">,</span> <span class="n">asksaveasfilename</span>
<span class="kn">from</span> <span class="nn">tkinter.font</span> <span class="kn">import</span> <span class="n">Font</span>
<span class="kn">from</span> <span class="nn">tkinter.messagebox</span> <span class="kn">import</span> <span class="n">showerror</span><span class="p">,</span> <span class="n">showinfo</span>
<span class="kn">from</span> <span class="nn">nltk.draw</span> <span class="kn">import</span> <span class="n">CFGEditor</span><span class="p">,</span> <span class="n">TreeSegmentWidget</span><span class="p">,</span> <span class="n">tree_to_treesegment</span>
<span class="kn">from</span> <span class="nn">nltk.draw.util</span> <span class="kn">import</span> <span class="p">(</span>
<span class="n">CanvasFrame</span><span class="p">,</span>
<span class="n">ColorizedList</span><span class="p">,</span>
<span class="n">EntryDialog</span><span class="p">,</span>
<span class="n">MutableOptionMenu</span><span class="p">,</span>
<span class="n">ShowText</span><span class="p">,</span>
<span class="n">SymbolWidget</span><span class="p">,</span>
<span class="p">)</span>
<span class="kn">from</span> <span class="nn">nltk.grammar</span> <span class="kn">import</span> <span class="n">CFG</span><span class="p">,</span> <span class="n">Nonterminal</span>
<span class="kn">from</span> <span class="nn">nltk.parse.chart</span> <span class="kn">import</span> <span class="p">(</span>
<span class="n">BottomUpPredictCombineRule</span><span class="p">,</span>
<span class="n">BottomUpPredictRule</span><span class="p">,</span>
<span class="n">Chart</span><span class="p">,</span>
<span class="n">LeafEdge</span><span class="p">,</span>
<span class="n">LeafInitRule</span><span class="p">,</span>
<span class="n">SingleEdgeFundamentalRule</span><span class="p">,</span>
<span class="n">SteppingChartParser</span><span class="p">,</span>
<span class="n">TopDownInitRule</span><span class="p">,</span>
<span class="n">TopDownPredictRule</span><span class="p">,</span>
<span class="n">TreeEdge</span><span class="p">,</span>
<span class="p">)</span>
<span class="kn">from</span> <span class="nn">nltk.tree</span> <span class="kn">import</span> <span class="n">Tree</span>
<span class="kn">from</span> <span class="nn">nltk.util</span> <span class="kn">import</span> <span class="n">in_idle</span>
<span class="c1"># Known bug: ChartView doesn't handle edges generated by epsilon</span>
<span class="c1"># productions (e.g., [Production: PP -> ]) very well.</span>
<span class="c1">#######################################################################</span>
<span class="c1"># Edge List</span>
<span class="c1">#######################################################################</span>
<span class="k">class</span> <span class="nc">EdgeList</span><span class="p">(</span><span class="n">ColorizedList</span><span class="p">):</span>
<span class="n">ARROW</span> <span class="o">=</span> <span class="n">SymbolWidget</span><span class="o">.</span><span class="n">SYMBOLS</span><span class="p">[</span><span class="s2">"rightarrow"</span><span class="p">]</span>
<span class="k">def</span> <span class="nf">_init_colortags</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">textwidget</span><span class="p">,</span> <span class="n">options</span><span class="p">):</span>
<span class="n">textwidget</span><span class="o">.</span><span class="n">tag_config</span><span class="p">(</span><span class="s2">"terminal"</span><span class="p">,</span> <span class="n">foreground</span><span class="o">=</span><span class="s2">"#006000"</span><span class="p">)</span>
<span class="n">textwidget</span><span class="o">.</span><span class="n">tag_config</span><span class="p">(</span><span class="s2">"arrow"</span><span class="p">,</span> <span class="n">font</span><span class="o">=</span><span class="s2">"symbol"</span><span class="p">,</span> <span class="n">underline</span><span class="o">=</span><span class="s2">"0"</span><span class="p">)</span>
<span class="n">textwidget</span><span class="o">.</span><span class="n">tag_config</span><span class="p">(</span><span class="s2">"dot"</span><span class="p">,</span> <span class="n">foreground</span><span class="o">=</span><span class="s2">"#000000"</span><span class="p">)</span>
<span class="n">textwidget</span><span class="o">.</span><span class="n">tag_config</span><span class="p">(</span>
<span class="s2">"nonterminal"</span><span class="p">,</span> <span class="n">foreground</span><span class="o">=</span><span class="s2">"blue"</span><span class="p">,</span> <span class="n">font</span><span class="o">=</span><span class="p">(</span><span class="s2">"helvetica"</span><span class="p">,</span> <span class="o">-</span><span class="mi">12</span><span class="p">,</span> <span class="s2">"bold"</span><span class="p">)</span>
<span class="p">)</span>
<span class="k">def</span> <span class="nf">_item_repr</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">item</span><span class="p">):</span>
<span class="n">contents</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">contents</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="s2">"</span><span class="si">%s</span><span class="se">\t</span><span class="s2">"</span> <span class="o">%</span> <span class="n">item</span><span class="o">.</span><span class="n">lhs</span><span class="p">(),</span> <span class="s2">"nonterminal"</span><span class="p">))</span>
<span class="n">contents</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="bp">self</span><span class="o">.</span><span class="n">ARROW</span><span class="p">,</span> <span class="s2">"arrow"</span><span class="p">))</span>
<span class="k">for</span> <span class="n">i</span><span class="p">,</span> <span class="n">elt</span> <span class="ow">in</span> <span class="nb">enumerate</span><span class="p">(</span><span class="n">item</span><span class="o">.</span><span class="n">rhs</span><span class="p">()):</span>
<span class="k">if</span> <span class="n">i</span> <span class="o">==</span> <span class="n">item</span><span class="o">.</span><span class="n">dot</span><span class="p">():</span>
<span class="n">contents</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="s2">" *"</span><span class="p">,</span> <span class="s2">"dot"</span><span class="p">))</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">elt</span><span class="p">,</span> <span class="n">Nonterminal</span><span class="p">):</span>
<span class="n">contents</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="s2">" </span><span class="si">%s</span><span class="s2">"</span> <span class="o">%</span> <span class="n">elt</span><span class="o">.</span><span class="n">symbol</span><span class="p">(),</span> <span class="s2">"nonterminal"</span><span class="p">))</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">contents</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="s2">" </span><span class="si">%r</span><span class="s2">"</span> <span class="o">%</span> <span class="n">elt</span><span class="p">,</span> <span class="s2">"terminal"</span><span class="p">))</span>
<span class="k">if</span> <span class="n">item</span><span class="o">.</span><span class="n">is_complete</span><span class="p">():</span>
<span class="n">contents</span><span class="o">.</span><span class="n">append</span><span class="p">((</span><span class="s2">" *"</span><span class="p">,</span> <span class="s2">"dot"</span><span class="p">))</span>
<span class="k">return</span> <span class="n">contents</span>
<span class="c1">#######################################################################</span>
<span class="c1"># Chart Matrix View</span>
<span class="c1">#######################################################################</span>
<span class="k">class</span> <span class="nc">ChartMatrixView</span><span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> A view of a chart that displays the contents of the corresponding matrix.</span>
<span class="sd"> """</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span>
<span class="bp">self</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">chart</span><span class="p">,</span> <span class="n">toplevel</span><span class="o">=</span><span class="kc">True</span><span class="p">,</span> <span class="n">title</span><span class="o">=</span><span class="s2">"Chart Matrix"</span><span class="p">,</span> <span class="n">show_numedges</span><span class="o">=</span><span class="kc">False</span>
<span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_chart</span> <span class="o">=</span> <span class="n">chart</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cells</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_marks</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_selected_cell</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">toplevel</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="o">=</span> <span class="n">Toplevel</span><span class="p">(</span><span class="n">parent</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">title</span><span class="p">(</span><span class="n">title</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">bind</span><span class="p">(</span><span class="s2">"<Control-q>"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">destroy</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_init_quit</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="o">=</span> <span class="n">Frame</span><span class="p">(</span><span class="n">parent</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_init_matrix</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_init_list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">)</span>
<span class="k">if</span> <span class="n">show_numedges</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_init_numedges</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_numedges_label</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_callbacks</span> <span class="o">=</span> <span class="p">{}</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_num_edges</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">draw</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">_init_quit</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root</span><span class="p">):</span>
<span class="n">quit</span> <span class="o">=</span> <span class="n">Button</span><span class="p">(</span><span class="n">root</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"Quit"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">destroy</span><span class="p">)</span>
<span class="n">quit</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"bottom"</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"none"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_init_matrix</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root</span><span class="p">):</span>
<span class="n">cframe</span> <span class="o">=</span> <span class="n">Frame</span><span class="p">(</span><span class="n">root</span><span class="p">,</span> <span class="n">border</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">relief</span><span class="o">=</span><span class="s2">"sunken"</span><span class="p">)</span>
<span class="n">cframe</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">expand</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"none"</span><span class="p">,</span> <span class="n">padx</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span> <span class="n">side</span><span class="o">=</span><span class="s2">"top"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_canvas</span> <span class="o">=</span> <span class="n">Canvas</span><span class="p">(</span><span class="n">cframe</span><span class="p">,</span> <span class="n">width</span><span class="o">=</span><span class="mi">200</span><span class="p">,</span> <span class="n">height</span><span class="o">=</span><span class="mi">200</span><span class="p">,</span> <span class="n">background</span><span class="o">=</span><span class="s2">"white"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_canvas</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">expand</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"none"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_init_numedges</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_numedges_label</span> <span class="o">=</span> <span class="n">Label</span><span class="p">(</span><span class="n">root</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"0 edges"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_numedges_label</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">expand</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"none"</span><span class="p">,</span> <span class="n">side</span><span class="o">=</span><span class="s2">"top"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_init_list</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_list</span> <span class="o">=</span> <span class="n">EdgeList</span><span class="p">(</span><span class="n">root</span><span class="p">,</span> <span class="p">[],</span> <span class="n">width</span><span class="o">=</span><span class="mi">20</span><span class="p">,</span> <span class="n">height</span><span class="o">=</span><span class="mi">5</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_list</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"top"</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"both"</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">cb</span><span class="p">(</span><span class="n">edge</span><span class="p">,</span> <span class="bp">self</span><span class="o">=</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fire_callbacks</span><span class="p">(</span><span class="s2">"select"</span><span class="p">,</span> <span class="n">edge</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_list</span><span class="o">.</span><span class="n">add_callback</span><span class="p">(</span><span class="s2">"select"</span><span class="p">,</span> <span class="n">cb</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_list</span><span class="o">.</span><span class="n">focus</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">destroy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">e</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="k">try</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">destroy</span><span class="p">()</span>
<span class="k">except</span><span class="p">:</span>
<span class="k">pass</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">set_chart</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">chart</span><span class="p">):</span>
<span class="k">if</span> <span class="n">chart</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_chart</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_chart</span> <span class="o">=</span> <span class="n">chart</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_num_edges</span> <span class="o">=</span> <span class="mi">0</span>
<span class="bp">self</span><span class="o">.</span><span class="n">draw</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="c1"># Count the edges in each cell</span>
<span class="n">N</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_cells</span><span class="p">)</span>
<span class="n">cell_edges</span> <span class="o">=</span> <span class="p">[[</span><span class="mi">0</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">N</span><span class="p">)]</span> <span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">N</span><span class="p">)]</span>
<span class="k">for</span> <span class="n">edge</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_chart</span><span class="p">:</span>
<span class="n">cell_edges</span><span class="p">[</span><span class="n">edge</span><span class="o">.</span><span class="n">start</span><span class="p">()][</span><span class="n">edge</span><span class="o">.</span><span class="n">end</span><span class="p">()]</span> <span class="o">+=</span> <span class="mi">1</span>
<span class="c1"># Color the cells correspondingly.</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">N</span><span class="p">):</span>
<span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">N</span><span class="p">):</span>
<span class="k">if</span> <span class="n">cell_edges</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="n">j</span><span class="p">]</span> <span class="o">==</span> <span class="mi">0</span><span class="p">:</span>
<span class="n">color</span> <span class="o">=</span> <span class="s2">"gray20"</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">color</span> <span class="o">=</span> <span class="s2">"#00</span><span class="si">{:02x}{:02x}</span><span class="s2">"</span><span class="o">.</span><span class="n">format</span><span class="p">(</span>
<span class="nb">min</span><span class="p">(</span><span class="mi">255</span><span class="p">,</span> <span class="mi">50</span> <span class="o">+</span> <span class="mi">128</span> <span class="o">*</span> <span class="n">cell_edges</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="n">j</span><span class="p">]</span> <span class="o">/</span> <span class="mi">10</span><span class="p">),</span>
<span class="nb">max</span><span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="mi">128</span> <span class="o">-</span> <span class="mi">128</span> <span class="o">*</span> <span class="n">cell_edges</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="n">j</span><span class="p">]</span> <span class="o">/</span> <span class="mi">10</span><span class="p">),</span>
<span class="p">)</span>
<span class="n">cell_tag</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cells</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="n">j</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_canvas</span><span class="o">.</span><span class="n">itemconfig</span><span class="p">(</span><span class="n">cell_tag</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="n">color</span><span class="p">)</span>
<span class="k">if</span> <span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">)</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_cell</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_canvas</span><span class="o">.</span><span class="n">itemconfig</span><span class="p">(</span><span class="n">cell_tag</span><span class="p">,</span> <span class="n">outline</span><span class="o">=</span><span class="s2">"#00ffff"</span><span class="p">,</span> <span class="n">width</span><span class="o">=</span><span class="mi">3</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_canvas</span><span class="o">.</span><span class="n">tag_raise</span><span class="p">(</span><span class="n">cell_tag</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_canvas</span><span class="o">.</span><span class="n">itemconfig</span><span class="p">(</span><span class="n">cell_tag</span><span class="p">,</span> <span class="n">outline</span><span class="o">=</span><span class="s2">"black"</span><span class="p">,</span> <span class="n">width</span><span class="o">=</span><span class="mi">1</span><span class="p">)</span>
<span class="c1"># Update the edge list.</span>
<span class="n">edges</span> <span class="o">=</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_chart</span><span class="o">.</span><span class="n">select</span><span class="p">(</span><span class="n">span</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_selected_cell</span><span class="p">))</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_list</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="n">edges</span><span class="p">)</span>
<span class="c1"># Update our edge count.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_num_edges</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_chart</span><span class="o">.</span><span class="n">num_edges</span><span class="p">()</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_numedges_label</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_numedges_label</span><span class="p">[</span><span class="s2">"text"</span><span class="p">]</span> <span class="o">=</span> <span class="s2">"</span><span class="si">%d</span><span class="s2"> edges"</span> <span class="o">%</span> <span class="bp">self</span><span class="o">.</span><span class="n">_num_edges</span>
<span class="k">def</span> <span class="nf">activate</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_canvas</span><span class="o">.</span><span class="n">itemconfig</span><span class="p">(</span><span class="s2">"inactivebox"</span><span class="p">,</span> <span class="n">state</span><span class="o">=</span><span class="s2">"hidden"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">inactivate</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_canvas</span><span class="o">.</span><span class="n">itemconfig</span><span class="p">(</span><span class="s2">"inactivebox"</span><span class="p">,</span> <span class="n">state</span><span class="o">=</span><span class="s2">"normal"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">add_callback</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">,</span> <span class="n">func</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_callbacks</span><span class="o">.</span><span class="n">setdefault</span><span class="p">(</span><span class="n">event</span><span class="p">,</span> <span class="p">{})[</span><span class="n">func</span><span class="p">]</span> <span class="o">=</span> <span class="mi">1</span>
<span class="k">def</span> <span class="nf">remove_callback</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">,</span> <span class="n">func</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="n">func</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">_callbacks</span><span class="p">[</span><span class="n">event</span><span class="p">]</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">del</span> <span class="bp">self</span><span class="o">.</span><span class="n">_callbacks</span><span class="p">[</span><span class="n">event</span><span class="p">][</span><span class="n">func</span><span class="p">]</span>
<span class="k">except</span><span class="p">:</span>
<span class="k">pass</span>
<span class="k">def</span> <span class="nf">_fire_callbacks</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">event</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
<span class="k">if</span> <span class="n">event</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_callbacks</span><span class="p">:</span>
<span class="k">return</span>
<span class="k">for</span> <span class="n">cb_func</span> <span class="ow">in</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_callbacks</span><span class="p">[</span><span class="n">event</span><span class="p">]</span><span class="o">.</span><span class="n">keys</span><span class="p">()):</span>
<span class="n">cb_func</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">select_cell</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="c1"># If the cell is already selected (and the chart contents</span>
<span class="c1"># haven't changed), then do nothing.</span>
<span class="k">if</span> <span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">)</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_cell</span> <span class="ow">and</span> <span class="bp">self</span><span class="o">.</span><span class="n">_chart</span><span class="o">.</span><span class="n">num_edges</span><span class="p">()</span> <span class="o">==</span> <span class="bp">self</span><span class="o">.</span><span class="n">_num_edges</span><span class="p">:</span>
<span class="k">return</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_selected_cell</span> <span class="o">=</span> <span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="c1"># Fire the callback.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_fire_callbacks</span><span class="p">(</span><span class="s2">"select_cell"</span><span class="p">,</span> <span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">deselect_cell</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_selected_cell</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_list</span><span class="o">.</span><span class="n">set</span><span class="p">([])</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">_click_cell</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selected_cell</span> <span class="o">==</span> <span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">deselect_cell</span><span class="p">()</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">select_cell</span><span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">view_edge</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">edge</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">select_cell</span><span class="p">(</span><span class="o">*</span><span class="n">edge</span><span class="o">.</span><span class="n">span</span><span class="p">())</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_list</span><span class="o">.</span><span class="n">view</span><span class="p">(</span><span class="n">edge</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">mark_edge</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">edge</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="bp">self</span><span class="o">.</span><span class="n">select_cell</span><span class="p">(</span><span class="o">*</span><span class="n">edge</span><span class="o">.</span><span class="n">span</span><span class="p">())</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_list</span><span class="o">.</span><span class="n">mark</span><span class="p">(</span><span class="n">edge</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">unmark_edge</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">edge</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_list</span><span class="o">.</span><span class="n">unmark</span><span class="p">(</span><span class="n">edge</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">markonly_edge</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">edge</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="bp">self</span><span class="o">.</span><span class="n">select_cell</span><span class="p">(</span><span class="o">*</span><span class="n">edge</span><span class="o">.</span><span class="n">span</span><span class="p">())</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_list</span><span class="o">.</span><span class="n">markonly</span><span class="p">(</span><span class="n">edge</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">draw</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="n">LEFT_MARGIN</span> <span class="o">=</span> <span class="n">BOT_MARGIN</span> <span class="o">=</span> <span class="mi">15</span>
<span class="n">TOP_MARGIN</span> <span class="o">=</span> <span class="mi">5</span>
<span class="n">c</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_canvas</span>
<span class="n">c</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="s2">"all"</span><span class="p">)</span>
<span class="n">N</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_chart</span><span class="o">.</span><span class="n">num_leaves</span><span class="p">()</span> <span class="o">+</span> <span class="mi">1</span>
<span class="n">dx</span> <span class="o">=</span> <span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">c</span><span class="p">[</span><span class="s2">"width"</span><span class="p">])</span> <span class="o">-</span> <span class="n">LEFT_MARGIN</span><span class="p">)</span> <span class="o">/</span> <span class="n">N</span>
<span class="n">dy</span> <span class="o">=</span> <span class="p">(</span><span class="nb">int</span><span class="p">(</span><span class="n">c</span><span class="p">[</span><span class="s2">"height"</span><span class="p">])</span> <span class="o">-</span> <span class="n">TOP_MARGIN</span> <span class="o">-</span> <span class="n">BOT_MARGIN</span><span class="p">)</span> <span class="o">/</span> <span class="n">N</span>
<span class="n">c</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="s2">"all"</span><span class="p">)</span>
<span class="c1"># Labels and dotted lines</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">N</span><span class="p">):</span>
<span class="n">c</span><span class="o">.</span><span class="n">create_text</span><span class="p">(</span>
<span class="n">LEFT_MARGIN</span> <span class="o">-</span> <span class="mi">2</span><span class="p">,</span> <span class="n">i</span> <span class="o">*</span> <span class="n">dy</span> <span class="o">+</span> <span class="n">dy</span> <span class="o">/</span> <span class="mi">2</span> <span class="o">+</span> <span class="n">TOP_MARGIN</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="nb">repr</span><span class="p">(</span><span class="n">i</span><span class="p">),</span> <span class="n">anchor</span><span class="o">=</span><span class="s2">"e"</span>
<span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">create_text</span><span class="p">(</span>
<span class="n">i</span> <span class="o">*</span> <span class="n">dx</span> <span class="o">+</span> <span class="n">dx</span> <span class="o">/</span> <span class="mi">2</span> <span class="o">+</span> <span class="n">LEFT_MARGIN</span><span class="p">,</span>
<span class="n">N</span> <span class="o">*</span> <span class="n">dy</span> <span class="o">+</span> <span class="n">TOP_MARGIN</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span>
<span class="n">text</span><span class="o">=</span><span class="nb">repr</span><span class="p">(</span><span class="n">i</span><span class="p">),</span>
<span class="n">anchor</span><span class="o">=</span><span class="s2">"n"</span><span class="p">,</span>
<span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">create_line</span><span class="p">(</span>
<span class="n">LEFT_MARGIN</span><span class="p">,</span>
<span class="n">dy</span> <span class="o">*</span> <span class="p">(</span><span class="n">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">+</span> <span class="n">TOP_MARGIN</span><span class="p">,</span>
<span class="n">dx</span> <span class="o">*</span> <span class="n">N</span> <span class="o">+</span> <span class="n">LEFT_MARGIN</span><span class="p">,</span>
<span class="n">dy</span> <span class="o">*</span> <span class="p">(</span><span class="n">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">+</span> <span class="n">TOP_MARGIN</span><span class="p">,</span>
<span class="n">dash</span><span class="o">=</span><span class="s2">"."</span><span class="p">,</span>
<span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">create_line</span><span class="p">(</span>
<span class="n">dx</span> <span class="o">*</span> <span class="n">i</span> <span class="o">+</span> <span class="n">LEFT_MARGIN</span><span class="p">,</span>
<span class="n">TOP_MARGIN</span><span class="p">,</span>
<span class="n">dx</span> <span class="o">*</span> <span class="n">i</span> <span class="o">+</span> <span class="n">LEFT_MARGIN</span><span class="p">,</span>
<span class="n">dy</span> <span class="o">*</span> <span class="n">N</span> <span class="o">+</span> <span class="n">TOP_MARGIN</span><span class="p">,</span>
<span class="n">dash</span><span class="o">=</span><span class="s2">"."</span><span class="p">,</span>
<span class="p">)</span>
<span class="c1"># A box around the whole thing</span>
<span class="n">c</span><span class="o">.</span><span class="n">create_rectangle</span><span class="p">(</span>
<span class="n">LEFT_MARGIN</span><span class="p">,</span> <span class="n">TOP_MARGIN</span><span class="p">,</span> <span class="n">LEFT_MARGIN</span> <span class="o">+</span> <span class="n">dx</span> <span class="o">*</span> <span class="n">N</span><span class="p">,</span> <span class="n">dy</span> <span class="o">*</span> <span class="n">N</span> <span class="o">+</span> <span class="n">TOP_MARGIN</span><span class="p">,</span> <span class="n">width</span><span class="o">=</span><span class="mi">2</span>
<span class="p">)</span>
<span class="c1"># Cells</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cells</span> <span class="o">=</span> <span class="p">[[</span><span class="kc">None</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">N</span><span class="p">)]</span> <span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">N</span><span class="p">)]</span>
<span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">N</span><span class="p">):</span>
<span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">N</span><span class="p">):</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">c</span><span class="o">.</span><span class="n">create_rectangle</span><span class="p">(</span>
<span class="n">j</span> <span class="o">*</span> <span class="n">dx</span> <span class="o">+</span> <span class="n">LEFT_MARGIN</span><span class="p">,</span>
<span class="n">i</span> <span class="o">*</span> <span class="n">dy</span> <span class="o">+</span> <span class="n">TOP_MARGIN</span><span class="p">,</span>
<span class="p">(</span><span class="n">j</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">*</span> <span class="n">dx</span> <span class="o">+</span> <span class="n">LEFT_MARGIN</span><span class="p">,</span>
<span class="p">(</span><span class="n">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">)</span> <span class="o">*</span> <span class="n">dy</span> <span class="o">+</span> <span class="n">TOP_MARGIN</span><span class="p">,</span>
<span class="n">fill</span><span class="o">=</span><span class="s2">"gray20"</span><span class="p">,</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cells</span><span class="p">[</span><span class="n">i</span><span class="p">][</span><span class="n">j</span><span class="p">]</span> <span class="o">=</span> <span class="n">t</span>
<span class="k">def</span> <span class="nf">cb</span><span class="p">(</span><span class="n">event</span><span class="p">,</span> <span class="bp">self</span><span class="o">=</span><span class="bp">self</span><span class="p">,</span> <span class="n">i</span><span class="o">=</span><span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="o">=</span><span class="n">j</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_click_cell</span><span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">tag_bind</span><span class="p">(</span><span class="n">t</span><span class="p">,</span> <span class="s2">"<Button-1>"</span><span class="p">,</span> <span class="n">cb</span><span class="p">)</span>
<span class="c1"># Inactive box</span>
<span class="n">xmax</span><span class="p">,</span> <span class="n">ymax</span> <span class="o">=</span> <span class="nb">int</span><span class="p">(</span><span class="n">c</span><span class="p">[</span><span class="s2">"width"</span><span class="p">]),</span> <span class="nb">int</span><span class="p">(</span><span class="n">c</span><span class="p">[</span><span class="s2">"height"</span><span class="p">])</span>
<span class="n">t</span> <span class="o">=</span> <span class="n">c</span><span class="o">.</span><span class="n">create_rectangle</span><span class="p">(</span>
<span class="o">-</span><span class="mi">100</span><span class="p">,</span>
<span class="o">-</span><span class="mi">100</span><span class="p">,</span>
<span class="n">xmax</span> <span class="o">+</span> <span class="mi">100</span><span class="p">,</span>
<span class="n">ymax</span> <span class="o">+</span> <span class="mi">100</span><span class="p">,</span>
<span class="n">fill</span><span class="o">=</span><span class="s2">"gray50"</span><span class="p">,</span>
<span class="n">state</span><span class="o">=</span><span class="s2">"hidden"</span><span class="p">,</span>
<span class="n">tag</span><span class="o">=</span><span class="s2">"inactivebox"</span><span class="p">,</span>
<span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">tag_lower</span><span class="p">(</span><span class="n">t</span><span class="p">)</span>
<span class="c1"># Update the cells.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">pack</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<span class="c1">#######################################################################</span>
<span class="c1"># Chart Results View</span>
<span class="c1">#######################################################################</span>
<span class="k">class</span> <span class="nc">ChartResultsView</span><span class="p">:</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">parent</span><span class="p">,</span> <span class="n">chart</span><span class="p">,</span> <span class="n">grammar</span><span class="p">,</span> <span class="n">toplevel</span><span class="o">=</span><span class="kc">True</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_chart</span> <span class="o">=</span> <span class="n">chart</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_grammar</span> <span class="o">=</span> <span class="n">grammar</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_trees</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_y</span> <span class="o">=</span> <span class="mi">10</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_treewidgets</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_selection</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_selectbox</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">if</span> <span class="n">toplevel</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="o">=</span> <span class="n">Toplevel</span><span class="p">(</span><span class="n">parent</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">title</span><span class="p">(</span><span class="s2">"Chart Parser Application: Results"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">bind</span><span class="p">(</span><span class="s2">"<Control-q>"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">destroy</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="o">=</span> <span class="n">Frame</span><span class="p">(</span><span class="n">parent</span><span class="p">)</span>
<span class="c1"># Buttons</span>
<span class="k">if</span> <span class="n">toplevel</span><span class="p">:</span>
<span class="n">buttons</span> <span class="o">=</span> <span class="n">Frame</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">)</span>
<span class="n">buttons</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"bottom"</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"x"</span><span class="p">)</span>
<span class="n">Button</span><span class="p">(</span><span class="n">buttons</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"Quit"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">destroy</span><span class="p">)</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"right"</span><span class="p">)</span>
<span class="n">Button</span><span class="p">(</span><span class="n">buttons</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"Print All"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">print_all</span><span class="p">)</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"left"</span><span class="p">)</span>
<span class="n">Button</span><span class="p">(</span><span class="n">buttons</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"Print Selection"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">print_selection</span><span class="p">)</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span>
<span class="n">side</span><span class="o">=</span><span class="s2">"left"</span>
<span class="p">)</span>
<span class="c1"># Canvas frame.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span> <span class="o">=</span> <span class="n">CanvasFrame</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">,</span> <span class="n">closeenough</span><span class="o">=</span><span class="mi">20</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"top"</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"both"</span><span class="p">)</span>
<span class="c1"># Initial update</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">update</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">edge</span><span class="o">=</span><span class="kc">None</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="c1"># If the edge isn't a parse edge, do nothing.</span>
<span class="k">if</span> <span class="n">edge</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">if</span> <span class="n">edge</span><span class="o">.</span><span class="n">lhs</span><span class="p">()</span> <span class="o">!=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_grammar</span><span class="o">.</span><span class="n">start</span><span class="p">():</span>
<span class="k">return</span>
<span class="k">if</span> <span class="n">edge</span><span class="o">.</span><span class="n">span</span><span class="p">()</span> <span class="o">!=</span> <span class="p">(</span><span class="mi">0</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_chart</span><span class="o">.</span><span class="n">num_leaves</span><span class="p">()):</span>
<span class="k">return</span>
<span class="k">for</span> <span class="n">parse</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_chart</span><span class="o">.</span><span class="n">parses</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_grammar</span><span class="o">.</span><span class="n">start</span><span class="p">()):</span>
<span class="k">if</span> <span class="n">parse</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_trees</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_add</span><span class="p">(</span><span class="n">parse</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_add</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">parse</span><span class="p">):</span>
<span class="c1"># Add it to self._trees.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_trees</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">parse</span><span class="p">)</span>
<span class="c1"># Create a widget for it.</span>
<span class="n">c</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span><span class="o">.</span><span class="n">canvas</span><span class="p">()</span>
<span class="n">treewidget</span> <span class="o">=</span> <span class="n">tree_to_treesegment</span><span class="p">(</span><span class="n">c</span><span class="p">,</span> <span class="n">parse</span><span class="p">)</span>
<span class="c1"># Add it to the canvas frame.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_treewidgets</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">treewidget</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span><span class="o">.</span><span class="n">add_widget</span><span class="p">(</span><span class="n">treewidget</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_y</span><span class="p">)</span>
<span class="c1"># Register callbacks.</span>
<span class="n">treewidget</span><span class="o">.</span><span class="n">bind_click</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_click</span><span class="p">)</span>
<span class="c1"># Update y.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_y</span> <span class="o">=</span> <span class="n">treewidget</span><span class="o">.</span><span class="n">bbox</span><span class="p">()[</span><span class="mi">3</span><span class="p">]</span> <span class="o">+</span> <span class="mi">10</span>
<span class="k">def</span> <span class="nf">_click</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">widget</span><span class="p">):</span>
<span class="n">c</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span><span class="o">.</span><span class="n">canvas</span><span class="p">()</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selection</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">c</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_selectbox</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_selection</span> <span class="o">=</span> <span class="n">widget</span>
<span class="p">(</span><span class="n">x1</span><span class="p">,</span> <span class="n">y1</span><span class="p">,</span> <span class="n">x2</span><span class="p">,</span> <span class="n">y2</span><span class="p">)</span> <span class="o">=</span> <span class="n">widget</span><span class="o">.</span><span class="n">bbox</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_selectbox</span> <span class="o">=</span> <span class="n">c</span><span class="o">.</span><span class="n">create_rectangle</span><span class="p">(</span><span class="n">x1</span><span class="p">,</span> <span class="n">y1</span><span class="p">,</span> <span class="n">x2</span><span class="p">,</span> <span class="n">y2</span><span class="p">,</span> <span class="n">width</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">outline</span><span class="o">=</span><span class="s2">"#088"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_color</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">treewidget</span><span class="p">,</span> <span class="n">color</span><span class="p">):</span>
<span class="n">treewidget</span><span class="o">.</span><span class="n">label</span><span class="p">()[</span><span class="s2">"color"</span><span class="p">]</span> <span class="o">=</span> <span class="n">color</span>
<span class="k">for</span> <span class="n">child</span> <span class="ow">in</span> <span class="n">treewidget</span><span class="o">.</span><span class="n">subtrees</span><span class="p">():</span>
<span class="k">if</span> <span class="nb">isinstance</span><span class="p">(</span><span class="n">child</span><span class="p">,</span> <span class="n">TreeSegmentWidget</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_color</span><span class="p">(</span><span class="n">child</span><span class="p">,</span> <span class="n">color</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">child</span><span class="p">[</span><span class="s2">"color"</span><span class="p">]</span> <span class="o">=</span> <span class="n">color</span>
<span class="k">def</span> <span class="nf">print_all</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">e</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span><span class="o">.</span><span class="n">print_to_file</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">print_selection</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">e</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selection</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="n">showerror</span><span class="p">(</span><span class="s2">"Print Error"</span><span class="p">,</span> <span class="s2">"No tree selected"</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">c</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span><span class="o">.</span><span class="n">canvas</span><span class="p">()</span>
<span class="k">for</span> <span class="n">widget</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_treewidgets</span><span class="p">:</span>
<span class="k">if</span> <span class="n">widget</span> <span class="ow">is</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selection</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span><span class="o">.</span><span class="n">destroy_widget</span><span class="p">(</span><span class="n">widget</span><span class="p">)</span>
<span class="n">c</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_selectbox</span><span class="p">)</span>
<span class="p">(</span><span class="n">x1</span><span class="p">,</span> <span class="n">y1</span><span class="p">,</span> <span class="n">x2</span><span class="p">,</span> <span class="n">y2</span><span class="p">)</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selection</span><span class="o">.</span><span class="n">bbox</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_selection</span><span class="o">.</span><span class="n">move</span><span class="p">(</span><span class="mi">10</span> <span class="o">-</span> <span class="n">x1</span><span class="p">,</span> <span class="mi">10</span> <span class="o">-</span> <span class="n">y1</span><span class="p">)</span>
<span class="n">c</span><span class="p">[</span><span class="s2">"scrollregion"</span><span class="p">]</span> <span class="o">=</span> <span class="sa">f</span><span class="s2">"0 0 </span><span class="si">{</span><span class="n">x2</span> <span class="o">-</span> <span class="n">x1</span> <span class="o">+</span> <span class="mi">20</span><span class="si">}</span><span class="s2"> </span><span class="si">{</span><span class="n">y2</span> <span class="o">-</span> <span class="n">y1</span> <span class="o">+</span> <span class="mi">20</span><span class="si">}</span><span class="s2">"</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span><span class="o">.</span><span class="n">print_to_file</span><span class="p">()</span>
<span class="c1"># Restore our state.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_treewidgets</span> <span class="o">=</span> <span class="p">[</span><span class="bp">self</span><span class="o">.</span><span class="n">_selection</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">clear</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">clear</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="k">for</span> <span class="n">treewidget</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_treewidgets</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span><span class="o">.</span><span class="n">destroy_widget</span><span class="p">(</span><span class="n">treewidget</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_trees</span> <span class="o">=</span> <span class="p">[]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_treewidgets</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_selection</span> <span class="ow">is</span> <span class="ow">not</span> <span class="kc">None</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_cframe</span><span class="o">.</span><span class="n">canvas</span><span class="p">()</span><span class="o">.</span><span class="n">delete</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_selectbox</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_selection</span> <span class="o">=</span> <span class="kc">None</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_y</span> <span class="o">=</span> <span class="mi">10</span>
<span class="k">def</span> <span class="nf">set_chart</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">chart</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">clear</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_chart</span> <span class="o">=</span> <span class="n">chart</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">set_grammar</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">grammar</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">clear</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_grammar</span> <span class="o">=</span> <span class="n">grammar</span>
<span class="bp">self</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">destroy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">e</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="k">try</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">destroy</span><span class="p">()</span>
<span class="k">except</span><span class="p">:</span>
<span class="k">pass</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">pack</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<span class="c1">#######################################################################</span>
<span class="c1"># Chart Comparer</span>
<span class="c1">#######################################################################</span>
<span class="k">class</span> <span class="nc">ChartComparer</span><span class="p">:</span>
<span class="sd">"""</span>
<span class="sd"> :ivar _root: The root window</span>
<span class="sd"> :ivar _charts: A dictionary mapping names to charts. When</span>
<span class="sd"> charts are loaded, they are added to this dictionary.</span>
<span class="sd"> :ivar _left_chart: The left ``Chart``.</span>
<span class="sd"> :ivar _left_name: The name ``_left_chart`` (derived from filename)</span>
<span class="sd"> :ivar _left_matrix: The ``ChartMatrixView`` for ``_left_chart``</span>
<span class="sd"> :ivar _left_selector: The drop-down ``MutableOptionsMenu`` used</span>
<span class="sd"> to select ``_left_chart``.</span>
<span class="sd"> :ivar _right_chart: The right ``Chart``.</span>
<span class="sd"> :ivar _right_name: The name ``_right_chart`` (derived from filename)</span>
<span class="sd"> :ivar _right_matrix: The ``ChartMatrixView`` for ``_right_chart``</span>
<span class="sd"> :ivar _right_selector: The drop-down ``MutableOptionsMenu`` used</span>
<span class="sd"> to select ``_right_chart``.</span>
<span class="sd"> :ivar _out_chart: The out ``Chart``.</span>
<span class="sd"> :ivar _out_name: The name ``_out_chart`` (derived from filename)</span>
<span class="sd"> :ivar _out_matrix: The ``ChartMatrixView`` for ``_out_chart``</span>
<span class="sd"> :ivar _out_label: The label for ``_out_chart``.</span>
<span class="sd"> :ivar _op_label: A Label containing the most recent operation.</span>
<span class="sd"> """</span>
<span class="n">_OPSYMBOL</span> <span class="o">=</span> <span class="p">{</span>
<span class="s2">"-"</span><span class="p">:</span> <span class="s2">"-"</span><span class="p">,</span>
<span class="s2">"and"</span><span class="p">:</span> <span class="n">SymbolWidget</span><span class="o">.</span><span class="n">SYMBOLS</span><span class="p">[</span><span class="s2">"intersection"</span><span class="p">],</span>
<span class="s2">"or"</span><span class="p">:</span> <span class="n">SymbolWidget</span><span class="o">.</span><span class="n">SYMBOLS</span><span class="p">[</span><span class="s2">"union"</span><span class="p">],</span>
<span class="p">}</span>
<span class="k">def</span> <span class="fm">__init__</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">chart_filenames</span><span class="p">):</span>
<span class="c1"># This chart is displayed when we don't have a value (eg</span>
<span class="c1"># before any chart is loaded).</span>
<span class="n">faketok</span> <span class="o">=</span> <span class="p">[</span><span class="s2">""</span><span class="p">]</span> <span class="o">*</span> <span class="mi">8</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_emptychart</span> <span class="o">=</span> <span class="n">Chart</span><span class="p">(</span><span class="n">faketok</span><span class="p">)</span>
<span class="c1"># The left & right charts start out empty.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_name</span> <span class="o">=</span> <span class="s2">"None"</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_name</span> <span class="o">=</span> <span class="s2">"None"</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_emptychart</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_chart</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_emptychart</span>
<span class="c1"># The charts that have been loaded.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_charts</span> <span class="o">=</span> <span class="p">{</span><span class="s2">"None"</span><span class="p">:</span> <span class="bp">self</span><span class="o">.</span><span class="n">_emptychart</span><span class="p">}</span>
<span class="c1"># The output chart.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_chart</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_emptychart</span>
<span class="c1"># The most recent operation</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_operator</span> <span class="o">=</span> <span class="kc">None</span>
<span class="c1"># Set up the root window.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="o">=</span> <span class="n">Tk</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">title</span><span class="p">(</span><span class="s2">"Chart Comparison"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">bind</span><span class="p">(</span><span class="s2">"<Control-q>"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">destroy</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">bind</span><span class="p">(</span><span class="s2">"<Control-x>"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">destroy</span><span class="p">)</span>
<span class="c1"># Initialize all widgets, etc.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_init_menubar</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_init_chartviews</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_init_divider</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_init_buttons</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_init_bindings</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="p">)</span>
<span class="c1"># Load any specified charts.</span>
<span class="k">for</span> <span class="n">filename</span> <span class="ow">in</span> <span class="n">chart_filenames</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">load_chart</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">destroy</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">e</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="ow">is</span> <span class="kc">None</span><span class="p">:</span>
<span class="k">return</span>
<span class="k">try</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">destroy</span><span class="p">()</span>
<span class="k">except</span><span class="p">:</span>
<span class="k">pass</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span> <span class="o">=</span> <span class="kc">None</span>
<span class="k">def</span> <span class="nf">mainloop</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">):</span>
<span class="k">return</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">mainloop</span><span class="p">(</span><span class="o">*</span><span class="n">args</span><span class="p">,</span> <span class="o">**</span><span class="n">kwargs</span><span class="p">)</span>
<span class="c1"># ////////////////////////////////////////////////////////////</span>
<span class="c1"># Initialization</span>
<span class="c1"># ////////////////////////////////////////////////////////////</span>
<span class="k">def</span> <span class="nf">_init_menubar</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root</span><span class="p">):</span>
<span class="n">menubar</span> <span class="o">=</span> <span class="n">Menu</span><span class="p">(</span><span class="n">root</span><span class="p">)</span>
<span class="c1"># File menu</span>
<span class="n">filemenu</span> <span class="o">=</span> <span class="n">Menu</span><span class="p">(</span><span class="n">menubar</span><span class="p">,</span> <span class="n">tearoff</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span>
<span class="n">filemenu</span><span class="o">.</span><span class="n">add_command</span><span class="p">(</span>
<span class="n">label</span><span class="o">=</span><span class="s2">"Load Chart"</span><span class="p">,</span>
<span class="n">accelerator</span><span class="o">=</span><span class="s2">"Ctrl-o"</span><span class="p">,</span>
<span class="n">underline</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span>
<span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">load_chart_dialog</span><span class="p">,</span>
<span class="p">)</span>
<span class="n">filemenu</span><span class="o">.</span><span class="n">add_command</span><span class="p">(</span>
<span class="n">label</span><span class="o">=</span><span class="s2">"Save Output"</span><span class="p">,</span>
<span class="n">accelerator</span><span class="o">=</span><span class="s2">"Ctrl-s"</span><span class="p">,</span>
<span class="n">underline</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span>
<span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">save_chart_dialog</span><span class="p">,</span>
<span class="p">)</span>
<span class="n">filemenu</span><span class="o">.</span><span class="n">add_separator</span><span class="p">()</span>
<span class="n">filemenu</span><span class="o">.</span><span class="n">add_command</span><span class="p">(</span>
<span class="n">label</span><span class="o">=</span><span class="s2">"Exit"</span><span class="p">,</span> <span class="n">underline</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">destroy</span><span class="p">,</span> <span class="n">accelerator</span><span class="o">=</span><span class="s2">"Ctrl-x"</span>
<span class="p">)</span>
<span class="n">menubar</span><span class="o">.</span><span class="n">add_cascade</span><span class="p">(</span><span class="n">label</span><span class="o">=</span><span class="s2">"File"</span><span class="p">,</span> <span class="n">underline</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">menu</span><span class="o">=</span><span class="n">filemenu</span><span class="p">)</span>
<span class="c1"># Compare menu</span>
<span class="n">opmenu</span> <span class="o">=</span> <span class="n">Menu</span><span class="p">(</span><span class="n">menubar</span><span class="p">,</span> <span class="n">tearoff</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span>
<span class="n">opmenu</span><span class="o">.</span><span class="n">add_command</span><span class="p">(</span>
<span class="n">label</span><span class="o">=</span><span class="s2">"Intersection"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_intersection</span><span class="p">,</span> <span class="n">accelerator</span><span class="o">=</span><span class="s2">"+"</span>
<span class="p">)</span>
<span class="n">opmenu</span><span class="o">.</span><span class="n">add_command</span><span class="p">(</span><span class="n">label</span><span class="o">=</span><span class="s2">"Union"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_union</span><span class="p">,</span> <span class="n">accelerator</span><span class="o">=</span><span class="s2">"*"</span><span class="p">)</span>
<span class="n">opmenu</span><span class="o">.</span><span class="n">add_command</span><span class="p">(</span>
<span class="n">label</span><span class="o">=</span><span class="s2">"Difference"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_difference</span><span class="p">,</span> <span class="n">accelerator</span><span class="o">=</span><span class="s2">"-"</span>
<span class="p">)</span>
<span class="n">opmenu</span><span class="o">.</span><span class="n">add_separator</span><span class="p">()</span>
<span class="n">opmenu</span><span class="o">.</span><span class="n">add_command</span><span class="p">(</span><span class="n">label</span><span class="o">=</span><span class="s2">"Swap Charts"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_swapcharts</span><span class="p">)</span>
<span class="n">menubar</span><span class="o">.</span><span class="n">add_cascade</span><span class="p">(</span><span class="n">label</span><span class="o">=</span><span class="s2">"Compare"</span><span class="p">,</span> <span class="n">underline</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">menu</span><span class="o">=</span><span class="n">opmenu</span><span class="p">)</span>
<span class="c1"># Add the menu</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_root</span><span class="o">.</span><span class="n">config</span><span class="p">(</span><span class="n">menu</span><span class="o">=</span><span class="n">menubar</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_init_divider</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root</span><span class="p">):</span>
<span class="n">divider</span> <span class="o">=</span> <span class="n">Frame</span><span class="p">(</span><span class="n">root</span><span class="p">,</span> <span class="n">border</span><span class="o">=</span><span class="mi">2</span><span class="p">,</span> <span class="n">relief</span><span class="o">=</span><span class="s2">"sunken"</span><span class="p">)</span>
<span class="n">divider</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"top"</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"x"</span><span class="p">,</span> <span class="n">ipady</span><span class="o">=</span><span class="mi">2</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_init_chartviews</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root</span><span class="p">):</span>
<span class="n">opfont</span> <span class="o">=</span> <span class="p">(</span><span class="s2">"symbol"</span><span class="p">,</span> <span class="o">-</span><span class="mi">36</span><span class="p">)</span> <span class="c1"># Font for operator.</span>
<span class="n">eqfont</span> <span class="o">=</span> <span class="p">(</span><span class="s2">"helvetica"</span><span class="p">,</span> <span class="o">-</span><span class="mi">36</span><span class="p">)</span> <span class="c1"># Font for equals sign.</span>
<span class="n">frame</span> <span class="o">=</span> <span class="n">Frame</span><span class="p">(</span><span class="n">root</span><span class="p">,</span> <span class="n">background</span><span class="o">=</span><span class="s2">"#c0c0c0"</span><span class="p">)</span>
<span class="n">frame</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"top"</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"both"</span><span class="p">)</span>
<span class="c1"># The left matrix.</span>
<span class="n">cv1_frame</span> <span class="o">=</span> <span class="n">Frame</span><span class="p">(</span><span class="n">frame</span><span class="p">,</span> <span class="n">border</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span> <span class="n">relief</span><span class="o">=</span><span class="s2">"groove"</span><span class="p">)</span>
<span class="n">cv1_frame</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"left"</span><span class="p">,</span> <span class="n">padx</span><span class="o">=</span><span class="mi">8</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">7</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"both"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_selector</span> <span class="o">=</span> <span class="n">MutableOptionMenu</span><span class="p">(</span>
<span class="n">cv1_frame</span><span class="p">,</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_charts</span><span class="o">.</span><span class="n">keys</span><span class="p">()),</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_select_left</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_selector</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"top"</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"x"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span> <span class="o">=</span> <span class="n">ChartMatrixView</span><span class="p">(</span>
<span class="n">cv1_frame</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_emptychart</span><span class="p">,</span> <span class="n">toplevel</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">show_numedges</span><span class="o">=</span><span class="kc">True</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"bottom"</span><span class="p">,</span> <span class="n">padx</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"both"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span><span class="o">.</span><span class="n">add_callback</span><span class="p">(</span><span class="s2">"select"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">select_edge</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span><span class="o">.</span><span class="n">add_callback</span><span class="p">(</span><span class="s2">"select_cell"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">select_cell</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span><span class="o">.</span><span class="n">inactivate</span><span class="p">()</span>
<span class="c1"># The operator.</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_op_label</span> <span class="o">=</span> <span class="n">Label</span><span class="p">(</span>
<span class="n">frame</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">" "</span><span class="p">,</span> <span class="n">width</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span> <span class="n">background</span><span class="o">=</span><span class="s2">"#c0c0c0"</span><span class="p">,</span> <span class="n">font</span><span class="o">=</span><span class="n">opfont</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_op_label</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"left"</span><span class="p">,</span> <span class="n">padx</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">5</span><span class="p">)</span>
<span class="c1"># The right matrix.</span>
<span class="n">cv2_frame</span> <span class="o">=</span> <span class="n">Frame</span><span class="p">(</span><span class="n">frame</span><span class="p">,</span> <span class="n">border</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span> <span class="n">relief</span><span class="o">=</span><span class="s2">"groove"</span><span class="p">)</span>
<span class="n">cv2_frame</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"left"</span><span class="p">,</span> <span class="n">padx</span><span class="o">=</span><span class="mi">8</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">7</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"both"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_selector</span> <span class="o">=</span> <span class="n">MutableOptionMenu</span><span class="p">(</span>
<span class="n">cv2_frame</span><span class="p">,</span> <span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_charts</span><span class="o">.</span><span class="n">keys</span><span class="p">()),</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_select_right</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_selector</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"top"</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"x"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span> <span class="o">=</span> <span class="n">ChartMatrixView</span><span class="p">(</span>
<span class="n">cv2_frame</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_emptychart</span><span class="p">,</span> <span class="n">toplevel</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">show_numedges</span><span class="o">=</span><span class="kc">True</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"bottom"</span><span class="p">,</span> <span class="n">padx</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"both"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span><span class="o">.</span><span class="n">add_callback</span><span class="p">(</span><span class="s2">"select"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">select_edge</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span><span class="o">.</span><span class="n">add_callback</span><span class="p">(</span><span class="s2">"select_cell"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">select_cell</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span><span class="o">.</span><span class="n">inactivate</span><span class="p">()</span>
<span class="c1"># The equals sign</span>
<span class="n">Label</span><span class="p">(</span><span class="n">frame</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"="</span><span class="p">,</span> <span class="n">width</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span> <span class="n">background</span><span class="o">=</span><span class="s2">"#c0c0c0"</span><span class="p">,</span> <span class="n">font</span><span class="o">=</span><span class="n">eqfont</span><span class="p">)</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span>
<span class="n">side</span><span class="o">=</span><span class="s2">"left"</span><span class="p">,</span> <span class="n">padx</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">5</span>
<span class="p">)</span>
<span class="c1"># The output matrix.</span>
<span class="n">out_frame</span> <span class="o">=</span> <span class="n">Frame</span><span class="p">(</span><span class="n">frame</span><span class="p">,</span> <span class="n">border</span><span class="o">=</span><span class="mi">3</span><span class="p">,</span> <span class="n">relief</span><span class="o">=</span><span class="s2">"groove"</span><span class="p">)</span>
<span class="n">out_frame</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"left"</span><span class="p">,</span> <span class="n">padx</span><span class="o">=</span><span class="mi">8</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">7</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"both"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_label</span> <span class="o">=</span> <span class="n">Label</span><span class="p">(</span><span class="n">out_frame</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"Output"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_label</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"top"</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">9</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_matrix</span> <span class="o">=</span> <span class="n">ChartMatrixView</span><span class="p">(</span>
<span class="n">out_frame</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_emptychart</span><span class="p">,</span> <span class="n">toplevel</span><span class="o">=</span><span class="kc">False</span><span class="p">,</span> <span class="n">show_numedges</span><span class="o">=</span><span class="kc">True</span>
<span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_matrix</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"bottom"</span><span class="p">,</span> <span class="n">padx</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">1</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"both"</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_matrix</span><span class="o">.</span><span class="n">add_callback</span><span class="p">(</span><span class="s2">"select"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">select_edge</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_matrix</span><span class="o">.</span><span class="n">add_callback</span><span class="p">(</span><span class="s2">"select_cell"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">select_cell</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_matrix</span><span class="o">.</span><span class="n">inactivate</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">_init_buttons</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root</span><span class="p">):</span>
<span class="n">buttons</span> <span class="o">=</span> <span class="n">Frame</span><span class="p">(</span><span class="n">root</span><span class="p">)</span>
<span class="n">buttons</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"bottom"</span><span class="p">,</span> <span class="n">pady</span><span class="o">=</span><span class="mi">5</span><span class="p">,</span> <span class="n">fill</span><span class="o">=</span><span class="s2">"x"</span><span class="p">,</span> <span class="n">expand</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span>
<span class="n">Button</span><span class="p">(</span><span class="n">buttons</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"Intersection"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_intersection</span><span class="p">)</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span>
<span class="n">side</span><span class="o">=</span><span class="s2">"left"</span>
<span class="p">)</span>
<span class="n">Button</span><span class="p">(</span><span class="n">buttons</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"Union"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_union</span><span class="p">)</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"left"</span><span class="p">)</span>
<span class="n">Button</span><span class="p">(</span><span class="n">buttons</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"Difference"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_difference</span><span class="p">)</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"left"</span><span class="p">)</span>
<span class="n">Frame</span><span class="p">(</span><span class="n">buttons</span><span class="p">,</span> <span class="n">width</span><span class="o">=</span><span class="mi">20</span><span class="p">)</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"left"</span><span class="p">)</span>
<span class="n">Button</span><span class="p">(</span><span class="n">buttons</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"Swap Charts"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_swapcharts</span><span class="p">)</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span><span class="n">side</span><span class="o">=</span><span class="s2">"left"</span><span class="p">)</span>
<span class="n">Button</span><span class="p">(</span><span class="n">buttons</span><span class="p">,</span> <span class="n">text</span><span class="o">=</span><span class="s2">"Detach Output"</span><span class="p">,</span> <span class="n">command</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">_detach_out</span><span class="p">)</span><span class="o">.</span><span class="n">pack</span><span class="p">(</span>
<span class="n">side</span><span class="o">=</span><span class="s2">"right"</span>
<span class="p">)</span>
<span class="k">def</span> <span class="nf">_init_bindings</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">root</span><span class="p">):</span>
<span class="c1"># root.bind('<Control-s>', self.save_chart)</span>
<span class="n">root</span><span class="o">.</span><span class="n">bind</span><span class="p">(</span><span class="s2">"<Control-o>"</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">load_chart_dialog</span><span class="p">)</span>
<span class="c1"># root.bind('<Control-r>', self.reset)</span>
<span class="c1"># ////////////////////////////////////////////////////////////</span>
<span class="c1"># Input Handling</span>
<span class="c1"># ////////////////////////////////////////////////////////////</span>
<span class="k">def</span> <span class="nf">_select_left</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_name</span> <span class="o">=</span> <span class="n">name</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_charts</span><span class="p">[</span><span class="n">name</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span><span class="o">.</span><span class="n">set_chart</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span><span class="p">)</span>
<span class="k">if</span> <span class="n">name</span> <span class="o">==</span> <span class="s2">"None"</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span><span class="o">.</span><span class="n">inactivate</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_apply_op</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">_select_right</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">name</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_name</span> <span class="o">=</span> <span class="n">name</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_chart</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_charts</span><span class="p">[</span><span class="n">name</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span><span class="o">.</span><span class="n">set_chart</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_right_chart</span><span class="p">)</span>
<span class="k">if</span> <span class="n">name</span> <span class="o">==</span> <span class="s2">"None"</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span><span class="o">.</span><span class="n">inactivate</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_apply_op</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">_apply_op</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_operator</span> <span class="o">==</span> <span class="s2">"-"</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_difference</span><span class="p">()</span>
<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">_operator</span> <span class="o">==</span> <span class="s2">"or"</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_union</span><span class="p">()</span>
<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">_operator</span> <span class="o">==</span> <span class="s2">"and"</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_intersection</span><span class="p">()</span>
<span class="c1"># ////////////////////////////////////////////////////////////</span>
<span class="c1"># File</span>
<span class="c1"># ////////////////////////////////////////////////////////////</span>
<span class="n">CHART_FILE_TYPES</span> <span class="o">=</span> <span class="p">[(</span><span class="s2">"Pickle file"</span><span class="p">,</span> <span class="s2">".pickle"</span><span class="p">),</span> <span class="p">(</span><span class="s2">"All files"</span><span class="p">,</span> <span class="s2">"*"</span><span class="p">)]</span>
<span class="k">def</span> <span class="nf">save_chart_dialog</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
<span class="n">filename</span> <span class="o">=</span> <span class="n">asksaveasfilename</span><span class="p">(</span>
<span class="n">filetypes</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">CHART_FILE_TYPES</span><span class="p">,</span> <span class="n">defaultextension</span><span class="o">=</span><span class="s2">".pickle"</span>
<span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">filename</span><span class="p">:</span>
<span class="k">return</span>
<span class="k">try</span><span class="p">:</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s2">"wb"</span><span class="p">)</span> <span class="k">as</span> <span class="n">outfile</span><span class="p">:</span>
<span class="n">pickle</span><span class="o">.</span><span class="n">dump</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_out_chart</span><span class="p">,</span> <span class="n">outfile</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="n">showerror</span><span class="p">(</span><span class="s2">"Error Saving Chart"</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"Unable to open file: </span><span class="si">{</span><span class="n">filename</span><span class="si">!r}</span><span class="se">\n</span><span class="si">{</span><span class="n">e</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">load_chart_dialog</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="o">*</span><span class="n">args</span><span class="p">):</span>
<span class="n">filename</span> <span class="o">=</span> <span class="n">askopenfilename</span><span class="p">(</span>
<span class="n">filetypes</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">CHART_FILE_TYPES</span><span class="p">,</span> <span class="n">defaultextension</span><span class="o">=</span><span class="s2">".pickle"</span>
<span class="p">)</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">filename</span><span class="p">:</span>
<span class="k">return</span>
<span class="k">try</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">load_chart</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="k">except</span> <span class="ne">Exception</span> <span class="k">as</span> <span class="n">e</span><span class="p">:</span>
<span class="n">showerror</span><span class="p">(</span><span class="s2">"Error Loading Chart"</span><span class="p">,</span> <span class="sa">f</span><span class="s2">"Unable to open file: </span><span class="si">{</span><span class="n">filename</span><span class="si">!r}</span><span class="se">\n</span><span class="si">{</span><span class="n">e</span><span class="si">}</span><span class="s2">"</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">load_chart</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">filename</span><span class="p">):</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="n">filename</span><span class="p">,</span> <span class="s2">"rb"</span><span class="p">)</span> <span class="k">as</span> <span class="n">infile</span><span class="p">:</span>
<span class="n">chart</span> <span class="o">=</span> <span class="n">pickle</span><span class="o">.</span><span class="n">load</span><span class="p">(</span><span class="n">infile</span><span class="p">)</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">os</span><span class="o">.</span><span class="n">path</span><span class="o">.</span><span class="n">basename</span><span class="p">(</span><span class="n">filename</span><span class="p">)</span>
<span class="k">if</span> <span class="n">name</span><span class="o">.</span><span class="n">endswith</span><span class="p">(</span><span class="s2">".pickle"</span><span class="p">):</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">name</span><span class="p">[:</span><span class="o">-</span><span class="mi">7</span><span class="p">]</span>
<span class="k">if</span> <span class="n">name</span><span class="o">.</span><span class="n">endswith</span><span class="p">(</span><span class="s2">".chart"</span><span class="p">):</span>
<span class="n">name</span> <span class="o">=</span> <span class="n">name</span><span class="p">[:</span><span class="o">-</span><span class="mi">6</span><span class="p">]</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_charts</span><span class="p">[</span><span class="n">name</span><span class="p">]</span> <span class="o">=</span> <span class="n">chart</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_selector</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_selector</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="c1"># If either left_matrix or right_matrix is empty, then</span>
<span class="c1"># display the new chart.</span>
<span class="k">if</span> <span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span> <span class="ow">is</span> <span class="bp">self</span><span class="o">.</span><span class="n">_emptychart</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_selector</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="k">elif</span> <span class="bp">self</span><span class="o">.</span><span class="n">_right_chart</span> <span class="ow">is</span> <span class="bp">self</span><span class="o">.</span><span class="n">_emptychart</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_selector</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="n">name</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_update_chartviews</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_matrix</span><span class="o">.</span><span class="n">update</span><span class="p">()</span>
<span class="c1"># ////////////////////////////////////////////////////////////</span>
<span class="c1"># Selection</span>
<span class="c1"># ////////////////////////////////////////////////////////////</span>
<span class="k">def</span> <span class="nf">select_edge</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">edge</span><span class="p">):</span>
<span class="k">if</span> <span class="n">edge</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span><span class="o">.</span><span class="n">markonly_edge</span><span class="p">(</span><span class="n">edge</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span><span class="o">.</span><span class="n">unmark_edge</span><span class="p">()</span>
<span class="k">if</span> <span class="n">edge</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_right_chart</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span><span class="o">.</span><span class="n">markonly_edge</span><span class="p">(</span><span class="n">edge</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span><span class="o">.</span><span class="n">unmark_edge</span><span class="p">()</span>
<span class="k">if</span> <span class="n">edge</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_out_chart</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_matrix</span><span class="o">.</span><span class="n">markonly_edge</span><span class="p">(</span><span class="n">edge</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_matrix</span><span class="o">.</span><span class="n">unmark_edge</span><span class="p">()</span>
<span class="k">def</span> <span class="nf">select_cell</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_matrix</span><span class="o">.</span><span class="n">select_cell</span><span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_right_matrix</span><span class="o">.</span><span class="n">select_cell</span><span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">)</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_out_matrix</span><span class="o">.</span><span class="n">select_cell</span><span class="p">(</span><span class="n">i</span><span class="p">,</span> <span class="n">j</span><span class="p">)</span>
<span class="c1"># ////////////////////////////////////////////////////////////</span>
<span class="c1"># Operations</span>
<span class="c1"># ////////////////////////////////////////////////////////////</span>
<span class="k">def</span> <span class="nf">_difference</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_checkcompat</span><span class="p">():</span>
<span class="k">return</span>
<span class="n">out_chart</span> <span class="o">=</span> <span class="n">Chart</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span><span class="o">.</span><span class="n">tokens</span><span class="p">())</span>
<span class="k">for</span> <span class="n">edge</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span><span class="p">:</span>
<span class="k">if</span> <span class="n">edge</span> <span class="ow">not</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_right_chart</span><span class="p">:</span>
<span class="n">out_chart</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span><span class="n">edge</span><span class="p">,</span> <span class="p">[])</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_update</span><span class="p">(</span><span class="s2">"-"</span><span class="p">,</span> <span class="n">out_chart</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_intersection</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_checkcompat</span><span class="p">():</span>
<span class="k">return</span>
<span class="n">out_chart</span> <span class="o">=</span> <span class="n">Chart</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span><span class="o">.</span><span class="n">tokens</span><span class="p">())</span>
<span class="k">for</span> <span class="n">edge</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span><span class="p">:</span>
<span class="k">if</span> <span class="n">edge</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_right_chart</span><span class="p">:</span>
<span class="n">out_chart</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span><span class="n">edge</span><span class="p">,</span> <span class="p">[])</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_update</span><span class="p">(</span><span class="s2">"and"</span><span class="p">,</span> <span class="n">out_chart</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_union</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="bp">self</span><span class="o">.</span><span class="n">_checkcompat</span><span class="p">():</span>
<span class="k">return</span>
<span class="n">out_chart</span> <span class="o">=</span> <span class="n">Chart</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span><span class="o">.</span><span class="n">tokens</span><span class="p">())</span>
<span class="k">for</span> <span class="n">edge</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_left_chart</span><span class="p">:</span>
<span class="n">out_chart</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span><span class="n">edge</span><span class="p">,</span> <span class="p">[])</span>
<span class="k">for</span> <span class="n">edge</span> <span class="ow">in</span> <span class="bp">self</span><span class="o">.</span><span class="n">_right_chart</span><span class="p">:</span>
<span class="n">out_chart</span><span class="o">.</span><span class="n">insert</span><span class="p">(</span><span class="n">edge</span><span class="p">,</span> <span class="p">[])</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_update</span><span class="p">(</span><span class="s2">"or"</span><span class="p">,</span> <span class="n">out_chart</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">_swapcharts</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="n">left</span><span class="p">,</span> <span class="n">right</span> <span class="o">=</span> <span class="bp">self</span><span class="o">.</span><span class="n">_left_name</span><span class="p">,</span> <span class="bp">self</span><span class="o">.</span><span class="n">_right_name</span>
<span class="bp">self</span><span class="o">.</span><span class="n">_left_selector</span><span class="o">.</span><span class="n">set</span><span class="p">(</span><span class="n">right</span><span class="p">)</span>