Latest Contributions by IvanBespalov

if you find com.esri.viewer.skins.WidgetTemplateSkin.mxml, you'll understand 1 - each widget has 5 states(by default) <!-- in com.esri.viewer.skins.WidgetTemplateSkin.mxml --> <s:states>         <s:State name="normal"/>         <s:State name="open"/>         <s:State name="minimized"/>         <s:State name="closed"/>         <s:State name="disabled"/> </s:states> 2 - widget and it's child components visibility, accessibility ... regulated by the state of widget. for example: if widget state is "closed" - it's main container is fully transparent <!-- in com.esri.viewer.skins.WidgetTemplateSkin.mxml --> <!-- the widget template wireframe --> <s:Group id="widgetFrame"              left="0" right="0" top="0" bottom="0"              alpha.closed="0"> minimize&close buttons container and it's childs is not visible, when widget is in "minimized" state <s:Group id="minclose"              height="30"              right="3" top="0"              includeInLayout.minimized="false"              visible.closed="false"              visible.minimized="false"> when I reopen it, it creates another instance of the widget No. Because, when you click on widget close button - NOTHING happens with widget and it's contents, but it's transparency changes to fully transparent. And, when you open closed/minimized widget you just change it's transparency. [INDENT][INDENT][INDENT]:rolleyes:[/INDENT][/INDENT][/INDENT] P.S. FlexViewer has no mechanism to unload modules (I did not find any). If you really want to unload smthing take a look to adobe forums and blogs. ... View more

NB! tested in FlexViewer 25 1 in <BaseWidget> tag of MyGreatestWidget.mxml: <?xml version="1.0" encoding="utf-8"?> <viewer:BaseWidget xmlns:fx="http://ns.adobe.com/mxml/2009" [INDENT]xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:viewer="com.esri.viewer.*" isResizeable="false">[/INDENT] [/HR] 2 in <script> tag of MyGreatestWidget.mxml: <?xml version="1.0" encoding="utf-8"?> <viewer:BaseWidget xmlns:fx="http://ns.adobe.com/mxml/2009" [INDENT]xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:viewer="com.esri.viewer.*" preinitialize="basewidget1_preinitializeHandler(event)"> <fx:Script> <![CDATA[ [INDENT]import mx.events.FlexEvent;  protected function basewidget1_preinitializeHandler(event:FlexEvent):void { [INDENT]this.isResizeable = false;[/INDENT] }[/INDENT] ]]> </fx:Script>[/INDENT] [/HR] 3 in configuration file of MyGreatestWidget.mxml: <configuration> [INDENT]<ismygreatestwidgetresizeable>mygreatestwidgetisnotresizeable</ismygreatestwidgetresizeable>[/INDENT] </configuration> <?xml version="1.0" encoding="utf-8"?> <viewer:BaseWidget xmlns:fx="http://ns.adobe.com/mxml/2009" [INDENT]xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" xmlns:viewer="com.esri.viewer.*" widgetConfigLoaded="init()"> [INDENT]<fx:Script> <![CDATA[ [INDENT]import mx.events.FlexEvent;     private function init():void { [INDENT]if (configXML) { [INDENT]if (String(configXML.ismygreatestwidgetresizeable) == "mygreatestwidgetisnotresizeable") { [INDENT]this.isResizeable = false;[/INDENT] }[/INDENT] }[/INDENT] }[/INDENT] ]]> </fx:Script>[/INDENT][/INDENT] [/HR] ... and other 357 ways to do it :cool: [/HR] P.S. There is such an ancient tradition, to ask questions about "Flex Viewer" on Flex Viewer Forum page ... View more

working with FeatureLayer <?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"        xmlns:s="library://ns.adobe.com/flex/spark"        xmlns:mx="library://ns.adobe.com/flex/mx">    <fx:Script>   <![CDATA[    import com.esri.ags.FeatureSet;    import com.esri.ags.Graphic;    import com.esri.ags.events.LayerEvent;    import com.esri.ags.layers.FeatureLayer;    import com.esri.ags.layers.supportClasses.Field;    import com.esri.ags.tasks.supportClasses.Query;        import mx.collections.ArrayCollection;    import mx.controls.Alert;    import mx.rpc.AsyncResponder;    import mx.rpc.Fault;    import mx.utils.StringUtil;        import spark.components.gridClasses.GridColumn;        [Bindable]    private var gridSource:ArrayCollection = new ArrayCollection();        [Bindable]    private var gridColumns:ArrayCollection = new ArrayCollection();        private var queryLayer:FeatureLayer = null;        private function initializeLayer():void    {     queryLayer = new FeatureLayer(txtServiceUrl.text);     queryLayer.mode = FeatureLayer.MODE_ON_DEMAND;     queryLayer.outFields = new Array("*");     queryLayer.addEventListener(LayerEvent.LOAD, onLayerLoaded, false, 0, true);     dispatchEvent(new LayerEvent(LayerEvent.LOAD, queryLayer));    }        protected function onLayerLoaded(event:LayerEvent):void    {     queryLayer.removeEventListener(LayerEvent.LOAD, onLayerLoaded);     txtServiceUrl.editable = false;     executeQuery();    }        protected function onExecuteButtonClick(event:MouseEvent):void    {     if (queryLayer != null && queryLayer.loaded)     {      executeQuery();     }     else      {      initializeLayer();     }    }        private function executeQuery():void    {     var query:Query = new Query();     query.where = txtWhere.text;          var outs:Array = StringUtil.trim(txtOuts.text).split(",");     query.outFields = queryLayer.outFields = outs;          queryLayer.queryFeatures(query, new AsyncResponder(onQueryResult, onQueryFault));    }        protected function onQueryResult(featureSet:FeatureSet, token:Object = null):void    {     gridSource = new ArrayCollection();     lblResultsCount.text = StringUtil.substitute("Found: {0} features.", featureSet.features.length);     for each(var gr:Graphic in featureSet.features)     {      gridSource.addItem(gr.attributes);     }     gridSource.refresh();          gridColumns = new ArrayCollection();     for each (var field:Field in featureSet.fields)     {      var gridColumn:GridColumn = new GridColumn(field.alias);      gridColumns.addItem(gridColumn);     }     gridColumns.refresh();           }        protected function onQueryFault(fault:Fault, token:Object = null):void    {     trace(fault.getStackTrace());     Alert.show("Query faults.", "Error");    }        protected function onGetLastResults(event:MouseEvent):void    {     if (gridSource) // != null     {      var messgae:String = StringUtil.substitute("Last results length is {0}", gridSource.length);      Alert.show(messgae, "Message");     }     else     {      Alert.show("No last results found!", "Warning");     }    }   ]]>  </fx:Script>      <s:Panel width="100%"      title="Query parameters">      <s:VGroup gap="5"        paddingLeft="5"        paddingTop="5"        paddingRight="5"        paddingBottom="5"        width="100%">        <s:HGroup width="100%">          <s:Label text="Url:"         width="150" />          <s:TextInput id="txtServiceUrl"         width="100%"         text="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5" />         </s:HGroup>        <s:HGroup width="100%">          <s:Label text="Where clause:"         width="150" />          <s:TextInput id="txtWhere"          width="100%"         text="1=1" />         </s:HGroup>        <s:HGroup width="100%">          <s:Label text="Out fields (CSV):"         width="150" />          <s:TextInput id="txtOuts"          width="100%"         text="STATE_NAME,STATE_FIPS,SUB_REGION,STATE_ABBR,POP2000,POP2007" />         </s:HGroup>        <s:HGroup width="100%">          <s:Button label="Execute" click="onExecuteButtonClick(event)" />          <s:Button label="Last result length" click="onGetLastResults(event)" />         </s:HGroup>       </s:VGroup>     </s:Panel>    <s:Panel title="Results"      width="100%"     height="100%">      <s:VGroup gap="5"        paddingLeft="5"        paddingTop="5"        paddingRight="5"        paddingBottom="5"        width="100%"       height="100%">        <s:Label id="lblResultsCount" />        <s:DataGrid width="100%"       height="100%"       dataProvider="{gridSource}"       columns="{gridColumns}"/>       </s:VGroup>     </s:Panel>   </s:Application> or working without feature layer (using QueryTask) <?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"        xmlns:s="library://ns.adobe.com/flex/spark"        xmlns:mx="library://ns.adobe.com/flex/mx">    <fx:Script>   <![CDATA[    import com.esri.ags.FeatureSet;    import com.esri.ags.Graphic;    import com.esri.ags.layers.supportClasses.Field;    import com.esri.ags.tasks.QueryTask;    import com.esri.ags.tasks.supportClasses.Query;        import mx.collections.ArrayCollection;    import mx.controls.Alert;    import mx.rpc.AsyncResponder;    import mx.rpc.Fault;    import mx.utils.StringUtil;        import spark.components.gridClasses.GridColumn;        [Bindable]    private var gridSource:ArrayCollection = new ArrayCollection();        [Bindable]    private var gridColumns:ArrayCollection = new ArrayCollection();        private var queryTask:QueryTask;        protected function onExecuteButtonClick(event:MouseEvent):void    {     executeQuery();    }        private function executeQuery():void    {     var query:Query = new Query();     query.where = txtWhere.text;     query.returnGeometry = false;          var outs:Array = StringUtil.trim(txtOuts.text).split(",");     query.outFields = outs;          queryTask = new QueryTask(txtServiceUrl.text);     queryTask.execute(query, new AsyncResponder(onQueryResult, onQueryFault));    }        protected function onQueryResult(featureSet:FeatureSet, token:Object = null):void    {     gridSource = new ArrayCollection();     lblResultsCount.text = StringUtil.substitute("Found: {0} features.", featureSet.features.length);     for each(var gr:Graphic in featureSet.features)     {      gridSource.addItem(gr.attributes);     }     gridSource.refresh();          gridColumns = new ArrayCollection();     for each (var field:Field in featureSet.fields)     {      var gridColumn:GridColumn = new GridColumn(field.alias);      gridColumns.addItem(gridColumn);     }     gridColumns.refresh();           }        protected function onQueryFault(fault:Fault, token:Object = null):void    {     trace(fault.getStackTrace());     Alert.show("Query faults.", "Error");    }        protected function onGetLastResults(event:MouseEvent):void    {     if (queryTask && queryTask.executeLastResult) // != null     {      var results:Array = queryTask.executeLastResult.attributes;      var messgae:String = StringUtil.substitute("Last results length is {0}", results.length);      Alert.show(messgae, "Message");     }     else     {      Alert.show("Query task is null or has no results!", "Warning");     }    }   ]]>  </fx:Script>      <s:Panel width="100%"      title="Query parameters">      <s:VGroup gap="5"        paddingLeft="5"        paddingTop="5"        paddingRight="5"        paddingBottom="5"        width="100%">        <s:HGroup width="100%">          <s:Label text="Url:"         width="150" />          <s:TextInput id="txtServiceUrl"         width="100%"         text="http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5" />         </s:HGroup>        <s:HGroup width="100%">          <s:Label text="Where clause:"         width="150" />          <s:TextInput id="txtWhere"          width="100%"         text="1=1" />         </s:HGroup>        <s:HGroup width="100%">          <s:Label text="Out fields (CSV):"         width="150" />          <s:TextInput id="txtOuts"          width="100%"         text="STATE_NAME,STATE_FIPS,SUB_REGION,STATE_ABBR,POP2000,POP2007" />         </s:HGroup>        <s:HGroup width="100%">          <s:Button label="Execute" click="onExecuteButtonClick(event)" />          <s:Button label="Last result length" click="onGetLastResults(event)" />         </s:HGroup>       </s:VGroup>     </s:Panel>    <s:Panel title="Results"      width="100%"     height="100%">      <s:VGroup gap="5"        paddingLeft="5"        paddingTop="5"        paddingRight="5"        paddingBottom="5"        width="100%"       height="100%">        <s:Label id="lblResultsCount" />        <s:DataGrid width="100%"       height="100%"       dataProvider="{gridSource}"       columns="{gridColumns}"/>       </s:VGroup>     </s:Panel>   </s:Application> Query execution returns: query faults (wrong query params, url, ...) query complete, but no results returned (nothing found ...) query complete, and results returned so you must listen/handle query complete/fault events to know "what happens?", to know "where happens?", to know "why queryTask.executeLastResult.attributes is null?"... good luck ... 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The request that is being sent is:  /ArcGIS/rest/services/chs/MapServer/35/query?f=json&geometryType=esriGeometryPolygon&  outFields=*&geometry={...}&  returnGeometry=true&inSR=28992&spatialRel=esriSpatialRelIntersects&outSR=28992 As i see outFields=* - all fields returnGeometry=true from API reference for queryFeatures() method Query features from the feature layer. Current layer properties (layer definition, time definition) will be honored and passed into the query. as i understand, layer definition = all layer params you set (mode, out fields ...) if you query through layer (not through QueryTask) you returnGeometry=false is ingored you need in ID's only? you can use queryIds() method - returns only objectIdField values ... View more

Using Singleton class TransferDataManager.as: package ee {  import flash.events.Event;  import flash.events.EventDispatcher;   [Event(name="onDataChanged", type="flash.events.Event")]  [Bindable]  public class TransferDataManager extends EventDispatcher  {   public static const TRANSFER_DATA_CHANGED:String = "onDataChanged";      private static var _instance:TransferDataManager;      /**    * @private    */   public function TransferDataManager(caller:Function = null)    {     if (caller != hidden)     throw new Error ("TransferDataManager is a singleton class, use getInstance() instead");        if (_instance != null)     throw new Error("Only one Singleton instance should be instantiated");   }      /**    * @return instance of ResourcesManager    *     */   public static function getInstance():TransferDataManager   {    if(!_instance)    {     _instance = new TransferDataManager(hidden);    }    return _instance;   }      /**    * @private    */   private static function hidden():void {}      public var transferedData:Object = null;      public function updateTransferData(obj:Object = null):void   {    transferedData = obj;    dispatchEvent(new Event(TRANSFER_DATA_CHANGED));   }  } } define it firstly in top level component ViewerContainer.mxml: <!---     Main application container. --> <s:Group xmlns:fx="http://ns.adobe.com/mxml/2009"          xmlns:s="library://ns.adobe.com/flex/spark"          width="100%" height="100%"  preinitialize="group1_preinitializeHandler(event)" ... protected function group1_preinitializeHandler(event:FlexEvent):void    {     initDataManager();    }        [Bindable]    private var transferManager:TransferDataManager;        protected function initDataManager():void    {     trace("ViewerContainer::initDataManager()");     transferManager = TransferDataManager.getInstance();    } Create SenderWidget.mxml: <?xml version="1.0" encoding="utf-8"?> <viewer:BaseWidget xmlns:fx="http://ns.adobe.com/mxml/2009"                    xmlns:s="library://ns.adobe.com/flex/spark"                    xmlns:mx="library://ns.adobe.com/flex/mx"                    xmlns:viewer="com.esri.viewer.*"        preinitialize="basewidget1_preinitializeHandler(event)">     <fx:Script>         <![CDATA[    import ee.TransferDataManager;           import mx.events.FlexEvent;        [Bindable]    private var transferManager:TransferDataManager;     protected function button1_clickHandler(event:MouseEvent):void    {     trace("SenderWidget::button1_clickHandler()");     // create some data you wand to pass     var transferData:Object = new Object();     transferData.message = txtInput.text;     transferData.date = new Date();          // get transfer manager instance     transferManager = TransferDataManager.getInstance();     transferManager.updateTransferData(transferData);       }        protected function basewidget1_preinitializeHandler(event:FlexEvent):void    {     initDataManager();    }        protected function initDataManager():void    {     trace("SenderWidget::initDataManager()");     transferManager = TransferDataManager.getInstance();     transferManager.addEventListener(TransferDataManager.TRANSFER_DATA_CHANGED, onTransferDataChanged);    }        protected function onTransferDataChanged(event:Event):void    {     trace("SenderWidget::onTransferDataChanged()");    }          ]]>     </fx:Script>     <viewer:WidgetTemplate id="senderWidget"                            width="300" height="300">         <viewer:layout>             <s:VerticalLayout horizontalAlign="center" verticalAlign="middle"/>         </viewer:layout>          <s:TextInput id="txtInput" />   <s:Button label="Send" click="button1_clickHandler(event)" />     </viewer:WidgetTemplate> </viewer:BaseWidget> and RecieverWidget.mxml: <?xml version="1.0" encoding="utf-8"?> <viewer:BaseWidget xmlns:fx="http://ns.adobe.com/mxml/2009"                    xmlns:s="library://ns.adobe.com/flex/spark"                    xmlns:mx="library://ns.adobe.com/flex/mx"                    xmlns:viewer="com.esri.viewer.*"        preinitialize="basewidget1_preinitializeHandler(event)">     <fx:Script>         <![CDATA[    import ee.TransferDataManager;        import mx.events.FlexEvent;    import mx.utils.StringUtil;        [Bindable]    private var transferManager:TransferDataManager;     protected function basewidget1_preinitializeHandler(event:FlexEvent):void    {     trace("RecieverWidget::basewidget1_preinitializeHandler()");     initDataManager();    }        protected function initDataManager():void    {     trace("RecieverWidget::initDataManager()");     transferManager = TransferDataManager.getInstance();     transferManager.addEventListener(TransferDataManager.TRANSFER_DATA_CHANGED, onTransferDataChanged);     var transferedData:Object = transferManager.transferedData;          if (transferedData)     {      if (transferedData.hasOwnProperty("message") && transferedData.hasOwnProperty("date"))      {       var msg:String = StringUtil.substitute("{0} -> {1}", transferedData.message, transferedData.date);       writeLog(msg);      }     }    }        protected function onTransferDataChanged(event:Event):void    {     trace("RecieverWidget::onTransferDataChanged()");     transferManager = TransferDataManager.getInstance();     var transferedData:Object = transferManager.transferedData;          if (transferedData)     {      if (transferedData.hasOwnProperty("message") && transferedData.hasOwnProperty("date"))      {       var msg:String = StringUtil.substitute("{0} -> {1}", transferedData.message, transferedData.date);       writeLog(msg);      }     }    }        private function writeLog(message:String):void    {     trace("RecieverWidget::writeLog()");     log.text = StringUtil.substitute("{0}\n{1}", message, log.text);    }          ]]>     </fx:Script>     <viewer:WidgetTemplate id="recieverWidget"                            width="300" height="300">         <viewer:layout>             <s:VerticalLayout horizontalAlign="center" verticalAlign="middle"/>         </viewer:layout>      <s:TextArea width="100%" height="100%" id="log" />     </viewer:WidgetTemplate> </viewer:BaseWidget> Sender and Receiver - is conditional. It can work in reverse mode. ... View more