u need to override the set data method of item renderer
On Fri, Nov 27, 2009 at 2:54 PM, Rogelio Canedo <[email protected]>wrote:
> Hi,
> I solicite you because I encounter a problem with an itemRenderer.
> I develop an application that displays data from a sensor in a DataGrid.
> there are several changes per second on my dataProvider (ArrayCollection)
> and I want to put the cell background in green if the value increases or in
> red if it decrease. Unfortunately, all changes in the dataProvider does not
> modify the background of my itemRenderer.
>
> [BEGIN ItemRenderer]
>
> package
> renderer
> {
> import flash.display.Graphics;
> import flash.events.Event;
> import mx.controls.Label;
> import mx.controls.dataGridClasses.*;
> import mx.events.ResizeEvent;
> [
> Style(name="backgroundColor", type="uint", format="Color", inherit="no")]
> public class BGRenderer extends Label {
> private var g:Graphics;
> private var cpt:int = 0;
> private var old:Number = 0;
> private var color:uint = 0;
> public function BGRenderer():void
> {
> super();
> this.addEventListener(ResizeEvent.RESIZE, resize);
> g = graphics;
> g.clear();
> }
> private function clear(ev:Event):void
> {
> if(++cpt == 25)
> {
> this.removeEventListener(Event.ENTER_FRAME, clear);
> g.clear();
> }
> }
> private function resize(ev:ResizeEvent):void
> {
> if(color != 0)
> {
> g.clear();
> g.beginFill(color);
> g.drawRect(0, 0, unscaledWidth, unscaledHeight);
> g.endFill();
> }
> }
> override protected function updateDisplayList(unscaledWidth:Number,
> unscaledHeight:Number):void
> {
> super.updateDisplayList(unscaledWidth, unscaledHeight);
> var val:Number = new Number(data[DataGridListData(listData).dataField]);
> if (!isNaN(val) && val != old)
> {
> cpt = 0;
> this.removeEventListener(Event.ENTER_FRAME, clear);
> g.clear();
> if(val < old)
> {
> color = 0xFF0000;
> g.beginFill(0xFF0000);
> }
> else
> {
> color = 0x00FF00;
> g.beginFill(0x00FF00);
> }
> old = val;
> g.drawRect(0, 0, unscaledWidth, unscaledHeight);
> g.endFill();
> this.addEventListener(Event.ENTER_FRAME, clear);
> }
> }
> }
> }
>
> [END ItemRenderer]
>
> to change data in my data provider I use this code:
>
> private
> var valeurDP:ArrayCollection;public
> function set temperature(val:String, iSonde:Number):void
> {
> var tmp:Object = valeurDP[iSonde];
> tmp.temperature = val;
> valeurDP.setItemAt(tmp, iSonde);
> }
>
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