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POAutomatically display a toolTip in an ItemRenderer when the row is visible in the DataGrid
 

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  1. POAutomatically display a toolTip in an ItemRenderer when the row is visible in the DataGrid
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    <p>I have an <code>AdvancedDataGrid</code> that uses <code>HierarchicalData</code> to display data in a tree format. For one of the columns, I'm using an <code>AdvancedDataGridRendererProvider</code> to conditionally display an image if certain conditions are met. I'm currently using the <code>ToolTipManager</code> to display additional information if the user mouses over the image.</p> <p><strong>Here's what I would like to do:</strong></p> <p>Instead of showing the <code>toolTip</code> when the user places their mouse over the image, I would like to automatically display the <code>toolTip</code> whenever the image is visible in the <code>AdvancedDataGrid</code>. If the user scrolls through the <code>AdvancedDataGrid</code>, the <code>toolTip</code> should move and follow along with its image accordingly.</p> <p>Sample AdvancedDataGrid:</p> <pre><code>&lt;mx:AdvancedDataGrid id="myAdvancedDataGrid" displayItemsExpanded="true" allowMultipleSelection="false" dataProvider="{myTreeData}" draggableColumns="false" depthColors="{[0xD6E5FF,0xFFFFFF]}" folderClosedIcon="{null}" folderOpenIcon="{null}" defaultLeafIcon="{null}"&gt; &lt;mx:columns&gt; &lt;mx:AdvancedDataGridColumn id="colID" headerText="ID" dataField="myID"/&gt; &lt;mx:AdvancedDataGridColumn id="colComments" headerText="Comments" dataField="comments"/&gt; &lt;/mx:columns&gt; &lt;mx:rendererProviders&gt; &lt;mx:AdvancedDataGridRendererProvider column="{colComments}" depth="2" dataField="comments" renderer="com.whatever.AdvancedDataGridCommentsRenderer" /&gt; &lt;/mx:rendererProviders&gt; &lt;/mx:AdvancedDataGrid&gt; </code></pre> <p>And the current AdvancedDataGridRendererProvider:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;mx:HBox xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" paddingLeft="2" paddingRight="2" paddingTop="2" horizontalScrollPolicy="off" verticalScrollPolicy="off" height="22" horizontalAlign="center"&gt; &lt;fx:Script&gt; &lt;![CDATA[ import mx.controls.ToolTip; import mx.events.FlexEvent; import mx.managers.ToolTipManager; [Embed(source="assets/myImage.png")] [Bindable] private var myIcon:Class; private var commentsToolTip:ToolTip; override public function set data(value:Object):void { super.data = value; if (value["comments"] != null) { if (value["comments"].toString().length &gt; 0) { myImage.visible = true; } else { myImage.visible = false; } } else { myImage.visible = false; } validateDisplayList(); } private function showToolTip(evt:Event, text:String):void { var pt:Point = new Point(evt.currentTarget.x, evt.currentTarget.y); // Convert the targets 'local' coordinates to 'global' -- this fixes the // tooltips positioning within containers. pt = evt.currentTarget.parent.contentToGlobal(pt); commentsToolTip = ToolTipManager.createToolTip(text, pt.x, pt.y, "errorTipAbove") as ToolTip; commentsToolTip.setStyle("borderColor", "#ff0000"); commentsToolTip.setStyle("color", "white"); var yOffset:int = commentsToolTip.height + 5; commentsToolTip.y -= yOffset; commentsToolTip.x -= 5; } // Remove the tooltip private function killToolTip():void { ToolTipManager.destroyToolTip(commentsToolTip); } ]]&gt; &lt;/fx:Script&gt; &lt;mx:Image id="myImage" source="{myIcon}" mouseOver="showToolTip(event, data['comments'].toString())" mouseOut="killToolTip()" /&gt; &lt;/mx:HBox&gt; </code></pre> <p>Any suggestions?</p>
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