potlatch2.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application
    xmlns:fx="http://ns.adobe.com/mxml/2009"
	xmlns:mx="library://ns.adobe.com/flex/mx"
    xmlns:s="library://ns.adobe.com/flex/spark"
	xmlns:halcyon="net.systemeD.halcyon.*"
	xmlns:potlatch2="net.systemeD.potlatch2.*"
	layout="vertical"
	horizontalScrollPolicy="off"
	verticalScrollPolicy="off"
	horizontalAlign="center" 
	addedToStage="startInit()"
	preloader="net.systemeD.potlatch2.Preloader">



	<fx:Style source="styles/Application.css"/>

    <fx:Declarations>
        <map:LocalizationMap xmlns:map="l10n.map.*" />
        <mx:Glow id="glowImage" duration="100"
            alphaFrom="0.3" alphaTo="1.0"
            blurXFrom="0.0" blurXTo="5.0"
            blurYFrom="0.0" blurYTo="5.0"
            color="0xFF8000"/>
        <mx:Glow id="unglowImage" duration="100"
            alphaFrom="1.0" alphaTo="0.3"
            blurXFrom="5.0" blurXTo="0.0"
            blurYFrom="5.0" blurYTo="0.0"
            color="0xFF8000"/>
        <mx:WipeLeft id="wipeOut" duration="250"/>
        <mx:WipeRight id="wipeIn" duration="250"/>
    </fx:Declarations>

    <mx:ApplicationControlBar id="controlbar" dock="true" tabChildren="false" >
        <mx:Button label="Save" icon="@Embed('embedded/upload.svg')" disabledIcon="@Embed('embedded/upload_disabled.svg')" styleName="appBarButton"
			click="SaveManager.saveChanges(theMap.editableLayer.connection);" id="saveButton" enabled="false"/>
        <mx:Button id="helpButton" label="Help" click="new HelpDialog().init();" styleName="appBarButton" />
        <mx:Spacer width="40"/>
        <mx:Button id="undo" label="Undo" click="MainUndoStack.getGlobalStack().undo();" styleName="appBarButton"
            enabled="{MainUndoStack.getGlobalStack().canUndo()}"
            toolTip="{MainUndoStack.getGlobalStack().getUndoDescription() ? 'Undo '+MainUndoStack.getGlobalStack().getUndoDescription() : 'Undo last action'}" />
        <mx:Button id="redo" label="Redo" click="MainUndoStack.getGlobalStack().redo();" styleName="appBarButton"
            enabled="{MainUndoStack.getGlobalStack().canRedo()}"
            toolTip="{MainUndoStack.getGlobalStack().getRedoDescription() ? 'Redo '+MainUndoStack.getGlobalStack().getRedoDescription() : 'Redo last action'}" />
        <mx:Spacer width="100%"/>
        <mx:PopUpButton id="bgButton" label="Background" openAlways="true" styleName="appBarButton" open="disableMapMouse();" close="enableMapMouse();" 
            creationComplete="bgButton.popUp = new BackgroundSelector();"/>
        <mx:PopUpButton id="styleButton" label="Map Style" openAlways="true" styleName="appBarButton" open="disableMapMouse();" close="enableMapMouse();" 
            creationComplete="styleButton.popUp = new StyleSelector();"/>
		<mx:PopUpMenuButton id="gpsButton" label="GPS" styleName="appBarButton" open="disableMapMouse();" close="enableMapMouse();" 
		    itemClick="if (event.index==0) { trackLoader.load(); } 
		          else if (event.index==1) { new MyGpxDialog().init(); } 
		                              else { mx.controls.Menu(gpsButton.popUp).selectedIndex=0; 
		    	                             mx.controls.Menu(gpsButton.popUp).selectedIndex=0; /* Yes, we do need to call it twice */
		    	                             theMap.removeLayerByName('GPS tracks'); }">
			<mx:dataProvider>
				<fx:Array>
					<fx:Object label="GPS data" id="gpsData" />
					<fx:Object label="My tracks" id="myTracks" />
					<fx:Object label="Clear" id="clearGps" />
				</fx:Array>
			</mx:dataProvider>
		</mx:PopUpMenuButton>
        <mx:PopUpButton id="bookmarkButton" label="Bookmarks" openAlways="true" styleName="appBarButton" open="disableMapMouse();" close="enableMapMouse();" 
            creationComplete="bookmarkButton.popUp = new BookmarkSelector().init();"/>
        <mx:Button id="tasksButton" label="Tasks" click="new TasksDialog().init(theController);" styleName="appBarButton" toolTip="Load tasks file" />
        <mx:Button id="optionsButton" label="Options" click="new OptionsDialog().init();" styleName="appBarButton" />
    </mx:ApplicationControlBar>
    
    <mx:HDividedBox width="100%" height="100%">

	  <!-- Tag viewer -->
	  <potlatch2:TagViewer width="25%" height="100%" id="tagViewer"/>

      <mx:VBox width="75%" height="100%" verticalGap="0" id="rhContent" >
          <mx:Canvas width="100%" height="100%">
            <mx:Canvas id="map_area" resize="onResizeMap()"
                top="0" left="0" width="100%" height="100%" dragEnter="dragEnterHandler(event);" dragDrop="dragDropHandler(event);">
            </mx:Canvas>
            <mx:Image source="@Embed('embedded/zoomIn.svg')" left="5" top="5" click="theMap.zoomIn(event.shiftKey ? 3 : 1);"
                rollOverEffect="glowImage" rollOutEffect="unglowImage" toolTip="{'Zoom in - currently z'+getScale()}" />
            <mx:Image source="@Embed('embedded/zoomOut.svg')" left="5" top="22" click="theMap.zoomOut(event.shiftKey ? 3 : 1);"
                rollOverEffect="glowImage" rollOutEffect="unglowImage" toolTip="{'Zoom out - currently z'+getScale()}" />
            <mx:Image source="@Embed('embedded/search.svg')" left="5" top="42" click="new FindDialog().init();"
                rollOverEffect="glowImage" rollOutEffect="unglowImage" toolTip="Find place" />
            <mx:TextArea id="dataWorking" text="" right="5" top="5" disabledColor="black" backgroundDisabledColor="0xFFFFEA" height="18"
                enabled="false" borderThickness="0"
                showEffect="{wipeIn}" hideEffect="{wipeOut}"/>
            <mx:TextArea id="coordsbox" left="25" top="5" disabledColor="black" backgroundDisabledColor="0xFFFFEA" height="33"
                width="70" enabled="false" borderThickness="0" visible="false"/>

        </mx:Canvas>
        <potlatch2:ContextualHelp width="100%" height="30" id="contextHelp" />
    </mx:VBox>

    </mx:HDividedBox>

	<fx:Script><![CDATA[
		import net.systemeD.halcyon.*;
		import net.systemeD.halcyon.connection.*;
		import net.systemeD.potlatch2.*;
		import net.systemeD.potlatch2.save.SaveManager;
		import net.systemeD.potlatch2.find.*;
		import net.systemeD.potlatch2.collections.*;
		import net.systemeD.potlatch2.controller.*;
		import net.systemeD.potlatch2.help.*;
		import net.systemeD.potlatch2.dialogs.*;
		import net.systemeD.potlatch2.utils.*;
		import net.systemeD.controls.FloatingAlert;
		import net.systemeD.controls.Spinner;
		import mx.managers.PopUpManager;
		import flash.system.Security;
		import flash.net.*;
		import flash.utils.Timer;
		import flash.events.TimerEvent;
		import flash.events.MouseEvent;
		import flash.display.Sprite;
		import mx.core.IChildList;
        import mx.containers.Canvas;
		import mx.core.Application;
		import mx.core.FlexGlobals;
        import mx.events.DragEvent;
        import mx.events.CloseEvent;
        import mx.managers.DragManager;
        import mx.core.DragSource;
        import mx.controls.Alert;
        import org.babelfx.events.LocaleEvent;

        public var theMap:Map;
        public var theController:EditController;
		public var trackLoader:TrackLoader;
		public var toolbox:Toolbox;
		public var floatingMap:FloatingMap;
        public var bugLoader:BugLoader;
        public var bikeShopLoader:BikeShopLoader;

		private var savecount:uint=0;
		private var loadcount:uint=0;
		private var spinner:Spinner;
		private var saveLabel:String='Save';
		private var saveTimer:Timer;
		private var mouseTimer:Timer;
		private var resizeTimer:Timer;

        include "version.as";

		private function startInit():void {
			var loader:Loader = new Loader();
			loader.contentLoaderInfo.addEventListener(Event.COMPLETE, startApp);
            if (loaderInfo.parameters['font_library']) {
			    loader.load(new URLRequest(loaderInfo.parameters['font_library']));
            } else {
			    loader.load(new URLRequest("FontLibrary.swf"));
            }

            if (loaderInfo.parameters['locale'] && loaderInfo.parameters['locale']!='en_US') {
                // we don't bother with localisation if the user is en_US, as P2 is in English by default
                Globals.vars.locale = loaderInfo.parameters['locale'];
                Globals.vars.locale_paths = loaderInfo.parameters['locale_paths'];
                dispatchEvent(new LocaleEvent(LocaleEvent.LOAD_LOCALE, loaderInfo.parameters['locale']));
                dispatchEvent(new LocaleEvent(LocaleEvent.LOAD_LOCALE, 'en_US')); // think en_US is default
                resourceManager.localeChain = [loaderInfo.parameters['locale'], 'en_US'];
            }
		}
		
		private function startApp(event:Event):void {
			controlbar.setStyle('dropShadowEnabled',"false");	// Flex 4 doesn't permit this in Application.css

			// Set font
			var FontLibrary:Class = event.target.applicationDomain.getDefinition("FontLibrary") as Class;
			Font.registerFont(FontLibrary.DejaVu);

			Globals.vars.map_area = map_area;
			Globals.vars.root = map_area.rawChildren;			// set up global reference to root level
			var _root:IChildList = map_area.rawChildren;		// convenient local shorthand
			Globals.vars.nocache = loaderInfo.parameters['nocache'] == 'true';
			Globals.vars.flashvars = loaderInfo.parameters;

			// Remember localised Save text, because we change this dynamically
			saveLabel=saveButton.label;

			// populate sharedObject with loaderInfo parameters if supplied
			var obj:SharedObject = SharedObject.getLocal("user_state","/");
			var objChanged:Boolean = false;
			if (loaderInfo.parameters['tileurl']) {
				obj.setProperty('background_url',loaderInfo.parameters['tileurl']); 
				obj.setProperty('background_name','Custom'); 
				objChanged=true;
			}
			if (loaderInfo.parameters['style']) { 
				obj.setProperty('stylesheet_url',loaderInfo.parameters['style']);
				obj.setProperty('stylesheet_name','Custom');
				objChanged=true; 
			}
			if (objChanged) { try { obj.flush(); } catch (e:Error) {} }

			// hide contextual help if user preference
			if (obj.data.hasOwnProperty('hide_context_help') && obj.data['hide_context_help']) {
				contextHelp.visible = false;
				contextHelp.height  = 0;
			}

			// map backdrop object
            var w:uint = map_area.width;
            var h:uint = map_area.height;
            var b:Sprite = new Sprite();
            b.height=h; b.width=w;
            b.graphics.beginFill(0xFFFFEA,100); 
            b.graphics.drawRect(0,0,w,h); 
            b.graphics.endFill();
			_root.addChild(b);

			// pass additional parameters to map
			var params:Object={}; var k:String;
			for (k in this.loaderInfo.parameters) params[k]=this.loaderInfo.parameters[k];
			for (k in SharedObject.getLocal('user_state',"/").data) params[k]=SharedObject.getLocal('user_state',"/").data[k];

			// Create map
			var overlay:Sprite=TileSet.overlaySprite();
			theMap=new Map(overlay);
			theMap.backdrop=b;
            theMap.updateSize(w,h);
			theMap.addEventListener(MapEvent.SCALE, scaleHandler);
			_root.addChild(theMap);
			_root.addChild(overlay);

			// Initialise stylesheets
			Stylesheets.instance().init();
			Stylesheets.instance().addEventListener(CollectionEvent.SELECT,
				function(e:CollectionEvent):void { theMap.editableLayer.setStyle(String(e.data)); }
			);

			// Add core data layer
			var conn:Connection = new XMLConnection("Main", params['api'], params['policy'], params);
            conn.addEventListener(Connection.LOAD_STARTED, onDataStart);
            conn.addEventListener(Connection.LOAD_COMPLETED, onDataComplete);
            conn.addEventListener(Connection.SAVE_STARTED, onDataStart);
            conn.addEventListener(Connection.SAVE_COMPLETED, onDataComplete);
            conn.addEventListener(Connection.DATA_DIRTY, onDataDirty);
            conn.addEventListener(Connection.DATA_CLEAN, onDataClean);
			conn.addEventListener(MapEvent.ERROR, onMapError);
			conn.addEventListener(AttentionEvent.ATTENTION, onAttention);
			conn.addEventListener(AttentionEvent.ALERT, onAlert);
			theMap.addLayer(conn, Stylesheets.instance().selected.url, false, true);

            // Auto-load vector backgrounds from config
            theMap.addEventListener(MapEvent.INITIALISED, function(e:Event):void { VectorBackgrounds.instance().init(theMap); });

			// Add loading 'spinner' indicator
			spinner=new Spinner();
			_root.addChild(spinner);
			spinner.x=dataWorking.x-20;
			spinner.y=dataWorking.y+dataWorking.height/2;

			// Set start position of map
			// ** FIXME: if lat/lon/zoom aren't supplied, we need to keep the map in a non-loading state 
			//           until the user has decided where to start editing (e.g. when the first GPX loads)
			theMap.init(params['lat'], params['lon'], params['zoom']);

			// mouse-up handler attached to stage, so the user can release outside the map
			stage.addEventListener(MouseEvent.MOUSE_UP, theMap.mouseUpHandler);
			Globals.vars.map_area.addEventListener(MouseEvent.MOUSE_MOVE, theMap.mouseMoveHandler);
			Globals.vars.map_area.addEventListener(MouseEvent.MOUSE_DOWN, theMap.mouseDownHandler);

			// initialise imagery
			theMap.tileset.blocks=[/google\./i];	// hard-coded block on Google tiles
			theMap.tileset.setDimming(params['background_dim']    ==null ? true  : params['background_dim']);
			theMap.tileset.setSharpen(params['background_sharpen']==null ? false : params['background_sharpen']);
			var imagery:Imagery = Imagery.instance();
			imagery.init();
			theMap.tileset.init(imagery.selected, imagery.selected != '');
			imagery.addEventListener(MapEvent.BUMP, bumpHandler);
			imagery.addEventListener(CollectionEvent.SELECT,
				function(e:CollectionEvent):void { 
					theMap.tileset.setBackgroundFromImagery(e.data,false);
				}
			);
			imagery.addEventListener('imageryLoaded',function(e:Event):void {
				// Tell the function key manager that we'd like to receive function key calls
				FunctionKeyManager.instance().registerListener('Background imagery',
					function(o:String):void { theMap.tileset.setBackgroundFromImagery(imagery.findBackgroundWithName(o),true); });
				dispatchEvent(new Event("collection_changed"));
			});
			imagery.addEventListener('refreshAttribution',function(e:Event):void {
				theMap.tileset.setLogo(); theMap.tileset.setAttribution(); theMap.tileset.setTerms(); 
			});
			
			// keyboard event attached to stage
			stage.addEventListener(KeyboardEvent.KEY_UP, theMap.keyUpHandler);
            
			// mouse-position listener for co-ordinate display
            theMap.addEventListener(MapEvent.MOUSE_MOVE, mouseoverHandler);

			// position toolbox
			toolbox=Toolbox(PopUpManager.createPopUp(this,Toolbox,false));
			toolbox.init(theController);
			toolbox.x=suggestToolboxX();
			toolbox.y=suggestToolboxY();
			Globals.vars.root=theMap;

			// create controller
            theController = new EditController(theMap, tagViewer, toolbox);
            theController.setActive();
			theController.addEventListener(AttentionEvent.ATTENTION, onAttention);
			theController.addEventListener(AttentionEvent.ALERT, onAlert);
			theController.addEventListener(EditController.CHANGED_STATE, onStateChanged);

			// add floating map
			floatingMap=FloatingMap(PopUpManager.createPopUp(this,FloatingMap,false));
			floatingMap.visible=false;
			floatingMap.init(theController);
			floatingMap.x=stage.stageWidth-410;
			floatingMap.y=36;

            // set the access token from saved cookie
            var tokenObject:SharedObject = SharedObject.getLocal("access_token","/");
            conn.setAccessToken(tokenObject.data["oauth_token"], tokenObject.data["oauth_token_secret"]);

            // Load any requested GPX track
            if (loaderInfo.parameters['gpx']) {
                var id:Number = loaderInfo.parameters['gpx'];
                if (conn.hasAccessToken()) { 
                    loadTrace(id);
                } else {
                    SaveManager.ensureAccess(function ():void { loadTrace(id); }, conn);
                }
            }

			// Load arbitrary GPX from provided URL
			if (loaderInfo.parameters['gpx_url']) {

                var gpx_url:String = loaderInfo.parameters['gpx_url'];

                var connection:Connection = new Connection(name, gpx_url, null, null);
                var gpx:GpxImporter=new GpxImporter(connection, theMap,
                                                function(connection:Connection,options:Object,success:Boolean,message:String=null):void {
                                                    if (!success) return;
                                                    var paint:MapPaint = theMap.addLayer(connection, "stylesheets/gpx.css");
                                                    paint.updateEntityUIs(false, false);
                                                    dispatchEvent(new Event("layers_changed"));
                                                }, false);
				gpx.importFromRemoteFiles([gpx_url]);
			}

			// create GPS trackloader
			trackLoader=new TrackLoader(theMap,conn.apiBase);

            // Force authentication on startup, if required
            // force_auth == force => checks for access token, and displays OAuth panel if needed
            var force_auth:String = loaderInfo.parameters["force_auth"];
            if (!conn.hasAccessToken() && force_auth == 'force') {
              SaveManager.ensureAccess(onAccessChecked, conn);
            }

            // show help dialog on startup, if required
            // show_help == always => on every startup
            // show_help == once => show on first startup only
            var show_help:String = loaderInfo.parameters["show_help"];

            if (show_help == 'always' || (show_help == 'once' && obj.data["help_shown"] != "true")) {
              new HelpDialog().init();
            }

            // Check if Tiger highlighting should be enabled from saved object
            Globals.vars.highlightTiger = obj.data['tiger_highlighted'];
		}
		
		public function onMapError(mapEvent:MapEvent):void {
			var buttons:uint=0;
			if (mapEvent.params.yes             ) buttons|=mx.controls.Alert.YES;
			if (mapEvent.params.no              ) buttons|=mx.controls.Alert.NO;
			if (mapEvent.params.cancel          ) buttons|=mx.controls.Alert.CANCEL;
			if (mapEvent.params.ok || buttons==0) buttons|=mx.controls.Alert.OK;
			Alert.show(mapEvent.params.message, 'Error', buttons, null, function(closeEvent:CloseEvent):void { 
				switch (closeEvent.detail) {
					case mx.controls.Alert.CANCEL:	mapEvent.params.cancel(); break; //fixme? this gets called if user presses escape, even if there's no cancel button.
					case mx.controls.Alert.YES:		mapEvent.params.yes(); break;
					case mx.controls.Alert.NO:		mapEvent.params.no(); break;
					default:						if (mapEvent.params.ok) mapEvent.params.ok();
				}
			});
		}

		/** Highlight an entity in response to an 'attention' event */

		public function onAttention(event:AttentionEvent):void {
			var entity:Entity=event.entity;
			if (entity is Relation) {
				// If it's a relation, just bring up the editor panel
				var panel:RelationEditorPanel = RelationEditorPanel(
					PopUpManager.createPopUp(Application(FlexGlobals.topLevelApplication), RelationEditorPanel, true));
				panel.setRelation(entity as Relation);
				PopUpManager.centerPopUp(panel);
				return;
			}

			var lat:Number, lon:Number;
			var panTo:Boolean=true;
			if (entity is Way) {
				// If it's a way, find if it's on-screen
				for (var i:uint=0; i<Way(entity).length; i++) {
					var node:Node=Way(entity).getNode(i)
					if (node.within(theMap.edge_l,theMap.edge_r,theMap.edge_t,theMap.edge_b)) { panTo=false; }
					lat=node.lat; lon=node.lon;
				}
			} else if (entity is Node) {
				// If it's a node, check if it's on-screen
				if (entity.within(theMap.edge_l,theMap.edge_r,theMap.edge_t,theMap.edge_b)) { panTo=false; }
				lat=Node(entity).lat; lon=Node(entity).lon;
			}
			// Pan if required, and select the object
			if (panTo) { theMap.moveMapFromLatLon(lat,lon); }
			theController.setState(theController.findStateForSelection([entity]));
		}

		/** Display floating warning in response to an 'alert' event */

		public function onAlert(event:AttentionEvent):void {
			var alert:FloatingAlert=new FloatingAlert(event.message);
			stage.addChild(alert);
		}

		/** ControllerState has changed, so update contextual help */
		
		public function onStateChanged(event:Event):void {
			var helpId:String = theController.state.contextualHelpId();
			contextHelp.selectedChild = contextHelp.hasOwnProperty("context"+helpId) ? contextHelp["context"+helpId] : contextHelp["contextNotFound"];
		}

        public function onResizeMap():void {
			if (!theMap) return;
			theMap.updateSize(map_area.width, map_area.height);

			if (toolbox) {
				toolbox.x=Math.min(toolbox.x,suggestToolboxX());
				toolbox.y=Math.min(toolbox.y,suggestToolboxY());
			}

			if (!resizeTimer) {
				resizeTimer=new Timer(300);
				resizeTimer.addEventListener(TimerEvent.TIMER, resizeMapEnd, false, 0, true);
			}
			resizeTimer.reset();
			resizeTimer.start();
        }
		private function resizeMapEnd(e:Event):void {
			resizeTimer.stop();
			theMap.download();
		}
		private function bumpHandler(e:MapEvent):void {
			if (toolbox) { 
				toolbox.y=Math.min(toolbox.y,suggestToolboxY(e.params.y+5));
			}
		}
		private function suggestToolboxX():int {
			var rhCP:Point=rhContent.localToGlobal(new Point(0,0));
			return rhCP.x + theMap.scrollRect.width - toolbox.width - 5;
		}
		private function suggestToolboxY(yOffset:int=0):int {
			var rhCP:Point=rhContent.localToGlobal(new Point(0,0));	// stage co-ordinates of right-hand content area
			return rhCP.y + theMap.scrollRect.height - toolbox.height - 5 - yOffset;
		}
		public function suggestTasksPaletteX():int {
			var rhCP:Point=rhContent.localToGlobal(new Point(0,0));
			return rhCP.x + 5;
		}
		public function suggestTasksPaletteY():int {
			var rhCP:Point=rhContent.localToGlobal(new Point(0,0));
			return rhCP.y + theMap.scrollRect.height - 55;
		}

		private function disableMapMouse():void {
			map_area.mouseChildren=false;
			map_area.mouseEnabled=false;
		}

		private function enableMapMouse():void {
			mouseTimer=new Timer(300);
			mouseTimer.addEventListener(TimerEvent.TIMER, doEnable, false, 0, true);
			mouseTimer.start();
		}
		
		private function doEnable(event:Event):void {
			map_area.mouseChildren=true;
			map_area.mouseEnabled=true;
			mouseTimer.removeEventListener(TimerEvent.TIMER, doEnable);
			mouseTimer=null;
		}

        private function mouseoverHandler(e:MapEvent):void {
            if (coordsbox.visible) {
                coordsbox.text= Number(e.params.x).toFixed(5) + "\n " + Number(e.params.y).toFixed(5); // Not sure if 5 dp's really required.
            }
        }

        private function onDataStart(event:Event):void {
			switch (event.type) {
				case Connection.LOAD_STARTED:	loadcount++; break;
				case Connection.SAVE_STARTED:	savecount++; break;
			}
			updateDataWorking();
        }
        private function onDataComplete(event:Event):void {
			switch (event.type) {
				case Connection.LOAD_COMPLETED:	loadcount--; break;
				case Connection.SAVE_COMPLETED:	savecount--; break;
			}
            updateDataWorking();
        }
		private function updateDataWorking():void {
			var t:String;
			if (loadcount>0 && savecount>0) { t="Loading/saving#..."; }
			else if (loadcount>0)           { t="Loading data#..."; }
			else if (savecount>0)           { t="Saving data..."; }
			else                            { t=""; }
			dataWorking.text=t.replace("#",(loadcount>1) ? (" ("+loadcount+")") : "");

			var previousState:Boolean=dataWorking.visible;
			var newState:Boolean=(dataWorking.text!="");
			if (!previousState && newState) spinner.start();
			if (previousState && !newState) spinner.stop();
			dataWorking.visible=newState;
		}
        private function onDataDirty(event:Event):void {
			saveButton.enabled=true;
            if (ExternalInterface.available) {
              ExternalInterface.call("markChanged", false);
            }
			if (!saveTimer || !saveTimer.running) {
				saveTimer=new Timer(60*1000,0);
				saveTimer.addEventListener(TimerEvent.TIMER,saveTimeUpdate);
				saveTimer.start();
			}
		}
		private function onDataClean(event:Event):void {
			saveButton.enabled=false;
            if (ExternalInterface.available) {
              ExternalInterface.call("markChanged", true);
            }
            if (saveTimer && saveTimer.running) {
				saveTimer.stop();
				saveTimer.removeEventListener(TimerEvent.TIMER,saveTimeUpdate);
				saveTimeWrite(0);
			}
		}
		private function saveTimeUpdate(event:TimerEvent):void {
			var timer:Timer=Timer(event.target);
			saveTimeWrite(uint(timer.delay*timer.currentCount/1000/60));
		}
		private function saveTimeWrite(minutes:uint):void {
			if (minutes<5) {
				saveButton.label=saveLabel;
			} else {
				saveButton.label=saveLabel+" ("+minutes+"m"+")"; 
				if (minutes>=20 && minutes/5==int(minutes/5)) {
					theController.dispatchEvent(new AttentionEvent(AttentionEvent.ALERT, null, minutes+"m since last save - please save regularly"));
				}
			}
		}

		private function scaleHandler(event:MapEvent):void {
			dispatchEvent(new Event("rescale"));
		}
		
		[Bindable(event="rescale")]
		private function getScale():String {
			return String(theMap.scale);
		}

        private function dragEnterHandler(event:DragEvent):void {
            // Get the drop target component from the event object.
            var dropTarget:Canvas=event.currentTarget as Canvas;
            // Accept the drag only if the user is dragging poi with tags
            if (event.dragSource.hasFormat('tags')) 
            {
                DragManager.acceptDragDrop(dropTarget);
            }
        }
        
        private function dragDropHandler(event:DragEvent):void {
			// Deselect the dragged icon
			if (event.dragSource.dataForFormat('container')) {
				event.dragSource.dataForFormat('container').selectedItem=-1;
			}

			// Get the tags
            var tags:Array = event.dragSource.dataForFormat('tags') as Array;

            // If you dnd quick enough, this exposes a flex bug and event.stageX/Y become negative.
            // Take the mouse positions from a displayObject's stage for consistent results.
            var mapLoc:Point = Globals.vars.root.globalToLocal(new Point(event.target.stage.mouseX, event.target.stage.mouseY));
            var lat:Number = Globals.vars.root.coord2lat(mapLoc.y);
            var lon:Number = Globals.vars.root.coord2lon(mapLoc.x);
            
            var createAction:CompositeUndoableAction = new CompositeUndoableAction("Create POI");
            
			var conn:Connection = theMap.editableLayer.connection;
            var node:Node = conn.createNode({}, lat, lon, createAction.push);
            for each ( var tag:Object in tags ) {
                node.setTag(tag.k, tag.v, createAction.push);
            }
			conn.registerPOI(node);
			MainUndoStack.getGlobalStack().addAction(createAction);
            theController.setState(new SelectedPOINode(node));
        }

        /* Called when forcing an initial access token check. */
        private function onAccessChecked():void {
            // Floaty panel message "You now have access";
        }

        private function loadTrace(id:Number):void {
			var conn:Connection = theMap.editableLayer.connection;
			conn.addEventListener(Connection.TRACES_LOADED, function (e:Event):void {
				var t:Trace = conn.findTrace(id);
				if (!t) { t=new Trace(conn,id); conn.addTrace(t); }
				t.addToMap();
				conn.removeEventListener(Connection.TRACES_LOADED, arguments.callee);
			});
			conn.fetchUserTraces();
        }

	]]></fx:Script>

</mx:Application>