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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