demo/nested.html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Nested grids demo (ES6)</title>
  <link rel="stylesheet" href="demo.css"/>
  <link rel="stylesheet" href="../dist/gridstack-extra.min.css"/>
  <script src="../dist/gridstack-h5.js"></script>
  <style type="text/css">
    /* make nested grids have slightly darker bg */
    .grid-stack.grid-stack-nested {
      background: #e4e4c1;
      border: 2px dashed rgba(0, 0, 0, 0.4);
      box-sizing: border-box;
    }
    /* make nested grid take almost all space (need some to tell them apart) so items inside can have similar to external size+margin */
    .grid-stack > .grid-stack-item.grid-stack-nested > .grid-stack-item-content {
      /* inset: 0 2px; not IE */
      top: 0;
      bottom: 0;
      left: 2px;
      right: 2px;
    }
    /* make nested grid take entire item content */
    .grid-stack-item-content .grid-stack {
      min-height: 100%;
      min-width: 100%;
    }
    .grid-stack-item > .grid-stack-item-content {
      inset: 5px !important;
    }
  </style>
</head>
<body>
  <div class="container-fluid">
    <h1>Nested grids demo</h1>
    <p>This example shows v5.x dragging between nested grids (dark yellow) and parent grid (bright yellow.)<br>
      Uses v3.1 API to load the entire nested grid from JSON.<br>
      Nested grids uses new <b>column:'auto'</b> to keep items same size during resize.</p>
    <a class="btn btn-primary" onClick="addNested()" href="#">Add Widget</a>
    <a class="btn btn-primary" onClick="addNewWidget('.sub1')" href="#">Add Widget Grid1</a>
    <a class="btn btn-primary" onClick="addNewWidget('.sub2')" href="#">Add Widget Grid2</a>
    <span>entire save/re-create:</span>
    <a class="btn btn-primary" onClick="save()" href="#">Save</a>
    <a class="btn btn-primary" onClick="destroy()" href="#">Destroy</a>
    <a class="btn btn-primary" onClick="load()" href="#">Create</a>
    <span>partial save/load:</span>
    <a class="btn btn-primary" onClick="save(true, false)" href="#">Save list</a>
    <a class="btn btn-primary" onClick="save(false, false)" href="#">Save no content</a>
    <a class="btn btn-primary" onClick="destroy(false)" href="#">Clear</a>
    <a class="btn btn-primary" onClick="load(false)" href="#">Load</a>
    <br><br>
    <!-- grid will be added here -->
  </div>

  <script type="text/javascript">
    let sub1 = [ {x:0, y:0}, {x:1, y:0}, {x:2, y:0}, {x:3, y:0}, {x:0, y:1}, {x:1, y:1}];
    let sub2 = [ {x:0, y:0}, {x:0, y:1, w:2}];
    let count = 0;
    [...sub1, ...sub2].forEach(d => d.content = String(count++));
    let subOptions = {
      cellHeight: 50, // should be 50 - top/bottom
      column: 'auto', // size to match container. make sure to include gridstack-extra.min.css
      acceptWidgets: true, // will accept .grid-stack-item by default
      margin: 5,
    };
    let options = { // main grid options
      cellHeight: 50,
      margin: 5,
      minRow: 2, // don't collapse when empty
      acceptWidgets: true,
      id: 'main',
      children: [
        {y:0, content: 'regular item'},
        {x:1, w:4, h:8, subGrid: {children: sub1, dragOut: true, class: 'sub1', ...subOptions}},
        {x:5, w:3, h:3, subGrid: {children: sub2, class: 'sub2', ...subOptions}},
      ]
    };

    // create and load it all from JSON above
    let grid = GridStack.addGrid(document.querySelector('.container-fluid'), options);

    addNested = function() {
      grid.addWidget({x:0, y:100, content:"new item"});
    }

    addNewWidget = function(selector) {
      let subGrid = document.querySelector(selector).gridstack;
      let node = {
        x: Math.round(6 * Math.random()),
        y: Math.round(5 * Math.random()),
        w: Math.round(1 + 1 * Math.random()),
        h: Math.round(1 + 1 * Math.random()),
        content: String(count++)
      };
      subGrid.addWidget(node);
      return false;
    };

    save = function(content = true, full = true) {
      options = grid.save(content, full);
      console.log(options);
      // console.log(JSON.stringify(options));
    }
    destroy = function(full = true) {
      if (full) {
        grid.destroy();
        grid = undefined;
      } else {
        grid.removeAll();
      }
    }
    load = function(full = true) {
      if (full) {
        grid = GridStack.addGrid(document.querySelector('.container-fluid'), options);
      } else {
        grid.load(options);
      }
    }

  </script>
</body>
</html>