DataGrid Checkbox

Question

Hello!
I have a DataGrid with this column:
<mx:DataGridColumn headerText="" width="25" itemRenderer="mx.controls.CheckBox" rendererIsEditor="true" editorDataField="selected" sortable="false" paddingLeft="6"/>
How can I get the ArrayCollection made up of the rows that have that checkbox selected when a button is pressed for example?
Thank you!

Answer 1

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Greg Lafrance - Flex 2 and 3 ACE certified
www.ChikaraDev.com
Flex / AIR Development, Training, and Support Services
Here you go:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
  <mx:Script>
    <![CDATA[
      import mx.collections.ArrayCollection;
      import mx.controls.CheckBox;
      private var arr:Array = [
        {name: "Bob Smith", FLAG: false},
        {name: "Fred Tompas", FLAG: false},
        {name: "Mary Freeman", FLAG: false},
        {name: "Tim Thorat", FLAG: false}
      [Bindable] public var ac:ArrayCollection = new ArrayCollection(arr);
      [Bindable] public var selectedNames:ArrayCollection = new ArrayCollection();
      private function selectedOnly(item:Object, idx:uint, arr:Array):Boolean {
        return (item.FLAG == "true");
    ]]>
  </mx:Script>
  <mx:DataGrid id="dg" dataProvider="{ac}">
    <mx:columns>
      <mx:DataGridColumn dataField="name" width="100" headerText="Name"/>
      <mx:DataGridColumn dataField="FLAG" width="100" headerText="Selected">
        <mx:itemRenderer>
          <mx:Component>
            <mx:CheckBox selectedField="FLAG" change="onChange(event);" label="">
              <mx:Script>
                <![CDATA[
                  import mx.controls.Alert;
                  private function onChange(evt:Event):void {
                    data.FLAG = !data.FLAG;
                    if(data.FLAG == true){
                      outerDocument.selectedNames.addItem(data.name);
                    }else{
                      if(outerDocument.selectedNames.contains(data.name)){
                        outerDocument.selectedNames.removeItemAt(outerDocument.selectedNames.getItemIndex(data.name));                       
                ]]>
              </mx:Script>
            </mx:CheckBox>
          </mx:Component>
        </mx:itemRenderer>           
      </mx:DataGridColumn>
    </mx:columns>
  </mx:DataGrid>
  <mx:List dataProvider="{selectedNames}"/>
</mx:Application>