Comments on: Flex ListBase scroll vertically error

By: Andriy

Andriy — Wed, 27 Apr 2011 18:53:34 +0000

Adobe livedocs (on Flex 3) say you should call List::validateNow() function after you have changed items in dataprovider to make instant effect.
This is not so curvy, as overriding classes…

By: Gaston

Gaston — Fri, 27 Aug 2010 17:41:04 +0000

I have a datagrid inside an HBox component. I´m using the Adobe Datagrid class. Can I override that method?

Thanks

By: Mika

Mika — Wed, 04 Mar 2009 23:29:14 +0000

You save my life Marc !

By: Raj

Raj — Fri, 30 Jan 2009 12:11:15 +0000

I also have the same problem,
I am using flex datagrid control and using random text and images into the column itemrenderer(using datagrid as chat window). Everything works fine before scrollbars appear.
When I scroll grid contents up and down,grid rows contents get exchanged i.e. some times top row appear in the middle, sometime it appear in the bottom.This happens with each row of the datagrid. I used the solution in post number 7, but it didn’t work for me.:(

Can someone show me the solution.

Thanks in advance.

By: Justin

Justin — Fri, 23 Jan 2009 05:08:59 +0000

Great work Marc, I probably never would have figured that out

By: Sonali

Sonali — Tue, 06 Jan 2009 05:54:32 +0000

I m getting same error when i m trying to scroll datagrid. I have tried the above given method in my grid class:
override protected function updateDisplayList(w:Number, h:Number):void {
var b:Boolean = false;

if( rendererChanged ) b = true;

super.updateDisplayList(w, h);
if( b ) {
while( rowInfo.length > listItems.length ) rowInfo.pop();
}
}

But its giving me error that
Access of undefined property : rendererChanged
Access of undefined property : rowInfo
Access of undefined property : listItems

Can someone tell me about these properties.

Thanks in advance

-Sonali.

By: Praneet

Praneet — Thu, 23 Oct 2008 19:30:16 +0000

Marc:

I have a problem with image distortion..(i.e.) when I scroll the datagrid, the images in each cell go haywire! I tried your solution but I get the following errors..

1120: Access of undefined property rendererChanged
1120: Access of undefined property listItems
1120: Access of undefined property rowInfo
1120: Access of undefined property rowInfo.

I have an mxml component in which I created a datagrid control and I have a tag with some methods in them to manipulate the datagrid…I included your workaround in the same script block but when I do..I get the above errors… Please help me out..

thanks,
Praneet

By: cuk

cuk — Thu, 17 Apr 2008 21:56:06 +0000

The solution worked perfectly even for DataGrids in Flex 2.0.1. Thanks a lot!!!!

By: Johto

Johto — Wed, 12 Mar 2008 17:33:24 +0000

Yes can someone explain wat “add to grid class” means? I have a List component and the same problem is happening!

By: Paul

Paul — Tue, 11 Mar 2008 16:13:00 +0000

Can someone please explain how to carry out the solution in post number 7 i.e Add this function to your grid class:

I am not sure what the grid class refers to.

I am experiencing problems with my datagrid whereby if I click on the scroll bar on the area behind the drag bar, the datagrid messes up and text from one row overlaps that of another. Content of the datagrid is also appearing out side the datagrid area below the datagrid.

I really need a solution of this badly!

Thanks

Paul