Thanks Olaf,
I tried to implement by making a public bindable variable "myCondition" in the
header renderer and then binding it to the TextInput text property (e.g.
<s:TextInput text="{myCondition}".../>).
but I get the same results -- the variable myCondition is correctly transferred
to the header renderer the FIRST time it is created, but after that, changes to
variable myCondition in the main application do not show up in the header. Any
idea what I'm doing wrong?
----- Original Message -----
From: "Olaf Krüger" <[email protected]>
To: "users, apache" <[email protected]>
Sent: Monday, December 1, 2014 6:59:35 AM
Subject: AW: how to updateDisplayList() in custom headerRenderer? (help!)
If your question is "How to pass additional data to an item renderer" this
could work for you:
(Take a look at the links to understand how it works)
/**
* Pass additional data to a Renderer
*
* @see
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/mx/core/ClassFactory.html
* @see
http://stackoverflow.com/questions/528796/flex-sending-a-parameter-to-a-custom-itemrenderer
*/
public static function createHeaderRenderer (renderer:Class,
myCondition:Number):IFactory
{
var factory:ClassFactory = new ClassFactory(renderer);
factory.properties = { myCondition: myCondition };
return factory;
}
…
<s:GridColumn headerRenderer="{createHeaderRenderer(MyHeaderRenderer,
myCondition)}"/>
…
-----Ursprüngliche Nachricht-----
Von: [email protected] [mailto:[email protected]]
Gesendet: Montag, 1. Dezember 2014 15:20
An: users, apache
Betreff: Re: how to updateDisplayList() in custom headerRenderer? (help!)
Hello again, I haven't got any response and was just hoping I could entice
someone to review my question below.
The code implements a textbook method to update the client model when someone
changes the text in a spark TextInput located in a header renderer. This works
fine. I just need to know a textbook method to go the other direction -- that
is, how to programmatically update the text in the TextInput? I'm sure there's
some standard way to do this, but I can't figure it out. Any hints much
appreciated. I've tried to copy all the relevant code below.
----- Original Message -----
From: [email protected]
To: "users, apache" <[email protected]>
Sent: Saturday, November 29, 2014 7:12:47 PM
Subject: how to updateDisplayList() in custom headerRenderer?
I'm using 4.12 SDK and trying to update a headerRenderer that includes a
TextInput. Things works fine when the component is initialized. But thereafter,
when I change the model such that the text showing in the TextInput box should
change, the text doesn't change.
Can someone help me figure out how to programmatically refresh the header
renderer TextInput text using function updateCondition() in file MyView.mxml
below?
I've tried create a temp IFactory for the header renderer, null the original
one, then save the temp back to the original, but this didn't work. Also tried
invalidateDisplayList() on myGrid (didn't work either).
Here's MyHeaderRenderer.mxml:
<?xml version="1.0" encoding="utf-8"?>
<s:GridItemRenderer
xmlns:fx="http://ns.adobe.com/mxml/2009";
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:itemRenderers="com.example.views.itemRenderers.*">
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import com.example.views.components.MyGrid;
public function ti_focusOut():void {
MyGrid(this.owner['parentDocument']).myCondition=Number(ti.text);
MyGrid(this.owner['parentDocument']).dispatchEvent(new
Event("myConditionChanged")); }
override protected function updateDisplayList(unscaledWidth:Number,
unscaledHeight:Number):void { if (this.owner['parentDocument'] && ti &&
MyGrid(this.owner['parentDocument']).myCondition) {
ti.text=String(MyGrid(this.owner['parentDocument']).myCondition);
}
super.updateDisplayList(unscaledWidth,unscaledHeight);
}
]]>
</fx:Script>
<s:states>
<s:State name="normal"/>
</s:states>
<s:TextInput id="ti" width="40" focusOut="ti_focusOut();"/>
</s:GridItemRenderer>
and here's MyGrid.mxml:
<?xml version="1.0" encoding="utf-8"?>
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009";
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<fx:Metadata>
[Event(name="myConditionChanged", type="flash.events.Event")] </fx:Metadata>
<fx:Script>
<![CDATA[
...
[Bindable] private var _myCondition:Number; public function set
myCondition(value:Number):void { _myCondition=value; if
(grid.columnHeaderGroup) {
grid.columnHeaderGroup.layout.clearVirtualLayoutCache();
grid.columnHeaderGroup.invalidateDisplayList();
}
grid.invalidateDisplayList();
}
[Bindable] public function get myCondition():Number { return _myCondition; }
...
]]>
</fx:Script>
<s:DataGrid id="grid">
<s:columns>
<s:ArrayList>
<s:GridColumn .../>
<s:GridColumn id="myColumn" dataField="myCond"
headerRenderer="com.example.views.itemRenderers.MyHeaderRenderer"/>
<s:GridColumn .../>
</s:ArrayList>
</s:columns>
</s:DataGrid>
</s:Group>
and finally, here is MyView.mxml:
<?xml version="1.0" encoding="utf-8"?>
<views:View xmlns:fx="http://ns.adobe.com/mxml/2009";
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:components="com.example.views.components.*">
...
<fx:Script>
<![CDATA[
private function updateCondition():void { myGrid.myCondition=newValue; // how
to force refresh of TextInput in header renderer with newValue?
}
private function onChange():void {
...
}
]]>
</fx:Script>
<components:MyGrid id="myGrid" myConditionChanged="onChange();"/>
...
</views:View>
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