?
Solved

Flex CheckBox in Datagrid

Posted on 2009-07-13
2
Medium Priority
?
5,519 Views
Last Modified: 2013-11-11
In the followin flex Code :
Also viewable at : http://www.cse.epicenterlabs.com/checkBoxDg/checkBoxDg.html
1. Add a row in datagrid by clicking on "AddRow"
2. Click on "CheckDg" to see the values of all the checkboxes
     - it shows "checkBox57" or "checkBox64" or some similar string
3. Now, "select" the checkBox in the first row.
4. Click again on "CheckDg"
    -it show "true"

So, initially dp.getItemAt(i).ck1 returns a CheckBox
and later it returns the "selected" value of the CheckBox?
Why this difference?

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" viewSourceURL="srcview/index.html">
		<mx:Canvas>
		<mx:DataGrid x="69" y="119" id="dgFee" editable="true" dataProvider="{dp}">
			<mx:columns>
			<mx:DataGridColumn headerText="Date" dataField="ck1" width="100" editable="true" 
			editorDataField="selected" rendererIsEditor="true">
			<mx:itemRenderer>
				<mx:Component>
					<mx:CheckBox selected="false">
					                   </mx:CheckBox>
				        </mx:Component>
			</mx:itemRenderer>
			</mx:DataGridColumn>
			           <mx:DataGridColumn dataField="amount" headerText="Amount" editable="true">
			             <mx:itemEditor>
			             <mx:Component>
			             	  	  <mx:TextInput restrict="0-9"/>
			             </mx:Component>
			             </mx:itemEditor> 	
			           </mx:DataGridColumn>
			</mx:columns>
		</mx:DataGrid>
		<mx:CheckBox x="130" y="54" label="Checkbox" selected="true" click="Alert.show(abc.selected.toString())" id="abc"/>
<mx:Script>
	<![CDATA[
		import mx.controls.CheckBox;
		import mx.collections.ArrayCollection;
		import mx.controls.Alert;
		public var dp:ArrayCollection = new ArrayCollection();
		public function addRow():void
		{
		  var tmp:Object = new Object();
		  tmp['amount'] = 100;
		  tmp['ck1'] = new CheckBox();
		  dp.addItem(tmp);
		}
		public function delRow():void
		{
			if(dgFee.selectedIndex != -1)
			dp.removeItemAt(dgFee.selectedIndex);
		}
 
		public function loop1():void
		{
			for(var i:int=0;i<dp.length;i++)
			{
			   Alert.show(dp.getItemAt(i).ck1);
			}
		}
	]]>
</mx:Script>
				<mx:Button x="29" y="89" label="AddRow" click="addRow()"/>
				<mx:Button x="107" y="89" label="DelRow" click="delRow()"/>
				<mx:Button x="184" y="89" label="CheckDg" click="loop1()"/>
 
</mx:Canvas>	
</mx:Application>

Open in new window

0
Comment
Question by:dtivmk
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
2 Comments
 
LVL 37

Accepted Solution

by:
zzynx earned 2000 total points
ID: 24846914
You render the attribute 'ck1' of your object (of type Object) by means of a CheckBox.
You also use the renderer as the editor (rendererIsEditor="true")

That means that when you select the checkbox, behind the scenes this statement performed:

         tmp['ck1'] = true;  (overwriting the previous value which was a CheckBox)

When you unselect it, behind the scenes this statement performed:

         tmp['ck1'] = false;


So in fact, it is of no use to have this:

tmp['ck1'] = new CheckBox();

Replace it by

        tmp['ck1'] = false;
0
 
LVL 37

Expert Comment

by:zzynx
ID: 24958321
Thanx 4 axxepting
0

Featured Post

VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

First things first - Preparation We need all the part for this install and it's much nicer to have them all on hand when you need them so here's what's required. Download Eclipse 3.5 32 bit (I like the Classic flavour) from here. (http://www.e…
Recently, I was asked to recommend a tracking system to be implemented on a clients website. As the entire site was built on flash, my first thought was to suggest custom built tracking system. However, our company at that point of time didn't h…
The goal of the tutorial is to teach the user how to set there setting in Adobe Flash Media Live Encoder and YouTube for optimal video and audio quality.
The goal of the tutorial is to teach the user how to select which audio input to use. Once you have an audio input plugged into the laptop or computer, you will go into the audio input settings and choose which audio input you want to use.

777 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question