Problem solved. But is was bizarre, so I'll explain. Also, I still have one or two questions, but mainly for education now...
First, I set the visible property of the dataGrid to false. I then check the redraw region and never saw the area that was causing trouble before. So I figured it was probably something in the dataGrid. The item renderers being prime suspect, as I wrote them.. I put it back to visible = true, and played some more. I discovered that the problem didnt manifest itself at first, only after a fair amount of mouse activity over the dataGrid. Maybe a memory leak in my item renderer? Then I looked at Alex Harui's blog, and saw that I could/ should be extending DataGridItemRenderer. I did that, and all seems fine now. The speed at which the dataGrid appearance keeps up with the mouse movements over it is 10x faster than before. My questions: 1. Are there any known issues with extending Label for item renderers? 1b. What's wrong with example 2 - extending Label - (below)? 2. Assuming that the item renderer only needs to manipulate the text of the renderer, is example 1 - extending DataItemGrid - (below) a good way to do it? (I've never written one before, so I'm just checking) 3. Is there anything else wrong with the example 1 below / a better way? thanks tom ******************* example 1 ******************** package com.*** { import mx.controls.dataGridClasses.DataGridItemRenderer; public class LengthRenderer extends DataGridItemRenderer { override public function set data(value:Object):void { super.data = value; if(value!= null && value.length != null) { this.invalidateProperties(); } } override public function validateProperties():void { super.validateProperties(); var mins:int = Math.floor(data.length/60) var secs:String = (data.length - mins).toString() if (secs.length == 1){secs = "0" + secs} this.text = mins.toString()+":"+secs } } } ******************* example 2 *********************** package com.*** { import mx.controls.Label; public class LengthRenderer extends Label { override public function set data(value:Object):void { super.data = value; if(value!= null && value.length != null) { this.invalidateDisplayList(); } } override protected function updateDisplayList(unscaledWidth:Number,unscaledHeight:Number):void { var mins:int = Math.floor(data.length/60) var secs:String = (data.length - mins).toString() if (secs.length == 1){secs = "0" + secs} this.text = mins.toString()+":"+secs } } } --- In flexcoders@yahoogroups.com, "Tim Hoff" <timh...@...> wrote: > > > Has to be another object on top of the DataGrid. The redraw region is > the clue. Look at the other objects in the same class as the DataGrid. > > -TH > > --- In flexcoders@yahoogroups.com, "Tracy Spratt" <tspratt@> wrote: > > > > If you are pretty sure there is not something invisible covering that > area, > > try cleaning the project. > > > > Tracy > > > > > > > > _____ > > > > From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] > On > > Behalf Of tom s > > Sent: Saturday, March 07, 2009 6:31 PM > > To: flexcoders@yahoogroups.com > > Subject: [flexcoders] dataGrid not receiving user input > (intermitently) in > > bottom right > > > > > > > > I have a datagrid that works ~50% of the time. > > > > The other 50% of the time the dataGrid wont accept user interaction in > the > > bottom right area (the bottom 3 (of 6) rows, right 2 (of 4) columns). > > > > i.e. that part of the grid does not react to mouse over events, not > mouse > > click events. > > > > Sometimes is reacts to click events as if they are occurring in the > row in > > which a mouse_over interaction was last observed. > > > > > > > > Looking at the redraw regions, I see that a redraw region occasionally > > appears in the bottom right of the grid - exactly where he grid is not > > receiving user input. > > > > So that is probably related. > > > > But I don't know what it is a redraw region for. I've checked my other > > component and they aren't near. > > > > > > > > I have the following custom item renderers: > > > > column 2: extends Canvas > > > > column 3: extends Label > > > > column 4: extends Label. > > > > > > > > Anyone know what might be causing this? > > > > Or how to fix it / diagnose it further? > > > > > > > > thanks > > > > > > > > tom > > >