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POCreating a column of RadioButtons in Adobe Flex
 

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  1. POCreating a column of RadioButtons in Adobe Flex
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    <p>I'm using the AdvancedDataGrid widget and I want two columns to be radio buttons, where each column is it's own RadioButtonGroup. I thought I had all the necessary mxxml, but I'm running into a strange behavior issue. When I scroll up and down, the button change values! The selected button becomes deselected, and unselected ones become selected. Anyone have a clue about this bug? Should I being going about this a different way. -- Here's a stripped down example of what I trying to do.</p> <pre><code>&lt;mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"&gt; &lt;mx:RadioButtonGroup id="leftAxisGrp" /&gt; &lt;mx:RadioButtonGroup id="rightAxisGrp"&gt; &lt;mx:change&gt; &lt;![CDATA[ trace (rightAxisGrp.selection); trace (rightAxisGrp.selection.data.name); ]]&gt; &lt;/mx:change&gt; &lt;/mx:RadioButtonGroup&gt; &lt;mx:AdvancedDataGrid id="readingsGrid" designViewDataType="flat" height="150" width="400" sortExpertMode="true" selectable="false"&gt; &lt;mx:columns&gt; &lt;mx:AdvancedDataGridColumn headerText="L" width="25" paddingLeft="6" dataField="left" sortable="false"&gt; &lt;mx:itemRenderer&gt; &lt;mx:Component&gt; &lt;mx:RadioButton groupName="leftAxisGrp" /&gt; &lt;/mx:Component&gt; &lt;/mx:itemRenderer&gt; &lt;/mx:AdvancedDataGridColumn&gt; &lt;mx:AdvancedDataGridColumn headerText="R" width="25" paddingLeft="6" dataField="right" sortable="false"&gt; &lt;mx:itemRenderer&gt; &lt;mx:Component&gt; &lt;mx:RadioButton groupName="rightAxisGrp" /&gt; &lt;/mx:Component&gt; &lt;/mx:itemRenderer&gt; &lt;/mx:AdvancedDataGridColumn&gt; &lt;mx:AdvancedDataGridColumn headerText="" dataField="name" /&gt; &lt;/mx:columns&gt; &lt;mx:dataProvider&gt; &lt;mx:Array&gt; &lt;mx:Object left="false" right="false" name="Reddish-gray Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Golden-brown Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Northern Rufous Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Sambirano Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Simmons' Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Pygmy Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Brown Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Madame Berthe's Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Goodman's Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Jolly's Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Mittermeier's Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Claire's Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Danfoss' Mouse Lemur" /&gt; &lt;mx:Object left="false" right="false" name="Lokobe Mouse Lemur" /&gt; &lt;mx:Object left="true" right="true" name="Bongolava Mouse Lemur" /&gt; &lt;/mx:Array&gt; &lt;/mx:dataProvider&gt; &lt;/mx:AdvancedDataGrid&gt; &lt;/mx:WindowedApplication&gt; </code></pre> <hr> <p><em>UPDATED</em> (thanks bill!)</p> <p>Alright! Go it working. I just had to make a couple of changes from bill's suggestion. Mainly using ArrayCollection with ObjectProxy so it was both bindable and dynamic. One weird thing - I couldn't select a button in the first row if I filled in the array at construction time; I had to delay that until the creationComplete event was fired (which is fine, since I'm going to populate the grid from a db anyway).</p> <pre><code>&lt;mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"&gt; &lt;mx:Script&gt; &lt;![CDATA[ import mx.utils.ObjectProxy; import mx.collections.ArrayCollection; [Bindable] private var myData:ArrayCollection = new ArrayCollection (); private function selectItem (selObject:Object, property:String) : void { for each (var obj:ObjectProxy in myData) { obj[property] = (obj.name === selObject.name); } readingsGrid.invalidateDisplayList (); } ]]&gt; &lt;/mx:Script&gt; &lt;mx:RadioButtonGroup id="leftAxisGrp"&gt; &lt;mx:change&gt; &lt;![CDATA[ selectItem (leftAxisGrp.selectedValue, 'left'); ]]&gt; &lt;/mx:change&gt; &lt;/mx:RadioButtonGroup&gt; &lt;mx:RadioButtonGroup id="rightAxisGrp"&gt; &lt;mx:change&gt; &lt;![CDATA[ selectItem (rightAxisGrp.selectedValue, 'right'); ]]&gt; &lt;/mx:change&gt; &lt;/mx:RadioButtonGroup&gt; &lt;mx:AdvancedDataGrid id="readingsGrid" designViewDataType="flat" dataProvider="{myData}" sortExpertMode="true" height="150" width="400" selectable="false"&gt; &lt;mx:columns&gt; &lt;mx:AdvancedDataGridColumn id="leftCol" headerText="L" width="25" paddingLeft="6" sortable="false"&gt; &lt;mx:itemRenderer&gt; &lt;mx:Component&gt; &lt;mx:RadioButton groupName="leftAxisGrp" buttonMode="true" value="{data}" selected="{data.left}" /&gt; &lt;/mx:Component&gt; &lt;/mx:itemRenderer&gt; &lt;/mx:AdvancedDataGridColumn&gt; &lt;mx:AdvancedDataGridColumn id="rightCol" headerText="R" width="25" paddingLeft="6" sortable="false"&gt; &lt;mx:itemRenderer&gt; &lt;mx:Component&gt; &lt;mx:RadioButton groupName="rightAxisGrp" buttonMode="true" value="{data}" selected="{data.right}" /&gt; &lt;/mx:Component&gt; &lt;/mx:itemRenderer&gt; &lt;/mx:AdvancedDataGridColumn&gt; &lt;mx:AdvancedDataGridColumn headerText="" dataField="name" /&gt; &lt;/mx:columns&gt; &lt;mx:creationComplete&gt; &lt;![CDATA[ myData.addItem(new ObjectProxy ({ left:true, right:true, name:"Golden-brown Mouse Lemur" })); myData.addItem(new ObjectProxy ({ left:false, right:false, name:"Reddish-gray Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Northern Rufous Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Sambirano Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Simmons' Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Pygmy Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Brown Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Madame Berthe's Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Goodman's Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Jolly's Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Mittermeier's Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Claire's Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Danfoss' Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Lokobe Mouse Lemur" })); myData.addItem( new ObjectProxy ({ left:false, right:false, name:"Bongolava Mouse Lemur" })); ]]&gt; &lt;/mx:creationComplete&gt; &lt;/mx:AdvancedDataGrid&gt; &lt;/mx:WindowedApplication&gt; </code></pre>
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