I have changed the LayerList widget so that the user can save and load layer preferences. I wanted to create a popup that opens when the widget loads that asks the user if they want to load their saved preferences or not - and that would have functionality similar to Robert's Splash widget so that they could tick a box and have their preference remembered.Everything works but it won't run the LoadLayers function from the initTOC function (highlighted in the code below). Can anyone point me to a solution? private function initTOC(expandLayerItems:Boolean = false):void { toc.map = map; toc.isMapServiceOnly = false; //gotta get this from the config file toc.excludeLayers = getExcludeLayers(); toc.basemapLayers = getBasemapLayers(); toc.excludeGraphicsLayers = true; toc.includeLegendItems = includeLegendItems; toc.expandLayerItems = expandLayerItems; wTemplate.addTitlebarButton("assets/images/i_save.png", "Save", saveLayers, false); wTemplate.addTitlebarButton("assets/images/i_folder.png", "Load", loadLayers, false); showwindowSO = SharedObject.getLocal(SHOWWINDOW); if (showwindowSO) { var sWindow:String = showwindowSO.data[SHOWWINDOW] as String; //is sWindow true? If it is then bWindow is true, if no then false var bWindow:Boolean = (sWindow == "true")?true:false; //Alert.show(bWindow.toString()); if(!bWindow) { window = CustomTitleWindow(PopUpManager.createPopUp(parent, CustomTitleWindow, true)); window.ellwidget = this; PopUpManager.centerPopUp(window); window.addEventListener("evtYes", yes); window.addEventListener("evtNo", no); } else if (bWindow) { var alwaysLoad:String = showwindowSO.data[ALWAYSLOAD] as String; var aLoad:Boolean = (alwaysLoad =="true")?true:false; if (aLoad) { //*********this next command works fine*********** Alert.show("aLoad is " + aLoad); //********but this one doesn't*********** loadLayers() } } } } public function dontShowWindowAgain(value:Boolean):void { showwindowSO.data[SHOWWINDOW] = value.toString(); showwindowSO.flush(); } public function alwaysLoadPrefs(value:Boolean):void { showwindowSO.data[ALWAYSLOAD] = value.toString(); showwindowSO.flush(); } public function neverLoadPrefs(value:Boolean):void { showwindowSO.data[NEVERLOAD] = value.toString(); showwindowSO.flush(); } private function yes(event:MouseEvent):void { Alert.show("The Yes request has been pressed"); loadLayers() } private function no(event:MouseEvent):void { Alert.show("The No request has been pressed"); } private function getExcludeLayers():ArrayCollection { var result:ArrayCollection = getBasemapLayers(); if (configXML) { var layers:XMLList = configXML.excludelayer as XMLList; for (var j:Number = 0; j < layers.length(); j++) { result.addItem(layers.toString()); } } return result; } private function getBasemapLayers():ArrayCollection { var result:ArrayCollection = new ArrayCollection(); if (configData && configData.basemaps) { for (var i:int = 0; i < configData.basemaps.length; i++) { result.addItem(configData.basemaps.label); } } return result; } private function saveLayers():void { //create sharedObject visLayersSO = SharedObject.getLocal("SavedPrefs"); //Array to store the visibility of the Layers var layerNodes:Array = new Array(); //Read each node of the TOC for each (var item:Object in toc.dataProvider) { //if the item is a TOC item if (item is TocItem) { //and if it is a group layer if (TocItem(item).isGroupLayer()) { //and if the check box is checked if (TocItem(item).visible == true) { //Store the name of the Layer in the array layerNodes[layerNodes.length] = TocItem(item).label; } //Verify the status of the children of this Group Layer FetchNextVisibleLayer(TocItem(item), layerNodes); } else { //The Toc Item should be visible //The item may not have a parent; if it has a parent - it should be a group layer if (TocItem(item).visible == true && (TocItem(item).parent == null || (TocItem(item).visible == true && TocItem(item).parent != null && TocItem(item).parent.isGroupLayer()))) { //Store the name of the Layer in the array layerNodes[layerNodes.length] = TocItem(item).label; } } } } //Store this Array in Shared Object visLayersSO.data[VISLAYERS] = layerNodes; visLayersSO.flush(); //If there is something in the saved layers then give user a message if (visLayersSO.size > 0) { Alert.show("Your layers have been saved.") } } private function loadLayers():void { //get the shared object visLayersSO = SharedObject.getLocal("SavedPrefs"); //if there is something in the shared object if (visLayersSO.size > 0) { //put the saved info into an array var layerNodes:Array = visLayersSO.data[VISLAYERS]; var item:Object; //run through the nodes in the TOC for each (item in toc.dataProvider) { //if the item is a TOC Item if (item is TocItem) { //If the name of the layer is present then it was checked on if(layerNodes.indexOf(TocItem(item).label) > -1) { //Check the Layer Checkbox in the TOC TocItem(item).visible = true; } //Verify the status of this layer's Children FetchNextLayer(TocItem(item), layerNodes); } } } //if there is nothing in the shared object tell the user else { Alert.show("You have no saved preferences"); } //check for unchecked items in the TOC for each (item in toc.dataProvider) { if (item is TocItem) { //if the layer's name is not present in the array it was not checked if(layerNodes.indexOf(TocItem(item).label) == -1) { //Uncheck the Group Layer Checkbox TocItem(item).visible = false; } //Go ahead to verify the status of the layer's Children FetchNextLayerUncheck(TocItem(item), layerNodes); } } } //If the Layer is visible, store its name in the input array //and go ahead to verify rest of the nodes private function FetchNextVisibleLayer(tocItem:TocItem, layerNodes:Array):void { //Check each and every node of the input Group Layer for each (var item:TocItem in tocItem.children) { //If it is a group layer if(item.isGroupLayer()) { //and it is visible if (item.visible == true) { //store it in the array layerNodes[layerNodes.length] = item.label; } //Since current group layer can have group layers in it, //keep checking until all the nodes are checked FetchNextVisibleLayer(item, layerNodes); } else { //We are checking all nodes but don't want to store the lengend symbology nodes //so we check if the item is visible and if its parent is a group layer //A valid layer's parent in this case is a group layer where as a Legend Node's parent is an ordinary layer if (item.visible == true && item.parent.isGroupLayer()) { layerNodes[layerNodes.length] = item.label; } } } } private function FetchNextLayer(tocItem:TocItem, layerNodes:Array):void { //go through the children for each (var item:TocItem in tocItem.children) { //if the name of that layer appears in the layerNodes array if(layerNodes.indexOf(item.label) > -1) { //then set the item's visible property to be true item.visible = true; } //Since a group layer can have group layers, keep checking until all the nodes are checked FetchNextLayer(item, layerNodes); } } //Uncheck the Layer's checkbox, if the input array doesn't contain the Layer's name private function FetchNextLayerUncheck(tocItem:TocItem, layerNodes:Array):void { for each (var item:TocItem in tocItem.children) { //if the name of that layer doesn't appear in the layerNodes array if(layerNodes.indexOf(item.label) == -1) { //set the item's visbile property to be false item.visible = false; } //Since a group layer can have group layers inside, keep checking until all the nodes are checked FetchNextLayerUncheck(item, layerNodes); } } ]]> </fx:Script>
