Sorry, I think I mis-wrote. At the time the renderer's updateDisplayList is called, the DataGrid has placed it and sized it according to its columnwidth and rowheight. If you then move it to the left and make it wider, you might be able to get away with it. Apparently someone did. The alternate approach I suggested was to put the wide renderer in the left column and just make it wider, then shrink the other columns that would overlay it. Good luck, -Alex
________________________________ From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Gareth Edwards Sent: Thursday, February 08, 2007 8:42 PM To: [email protected] Subject: Re: [flexcomponents] Best way to create a datagrid with collapsible grouped panels Tried the column span concept, and I can't seem to get it to work. I can't seem to draw content into negative coords within a cellrenderer because it seems to just clip the content? Could you provide any additional information on how this technique is possible? Cheers Gareth. On 2/2/07, Alex Harui <[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> > wrote: A Grid container creates a row for every child. The DataGrid only creates a row for every visible child. The difference is significant for very large data sets. However, because Grid rows can be anything, it can be easier to customize your appearance. Various folks have put together Tree/DataGrid combinations. See farata systems for an excellent example. You might just want to use their stuff. If you want to grow your own, other folks have done column span. The key is that the right column is at the top of the z-order for a row, and there is no clipping so it can actually draw itself into negative coordinates obscuring the columns to the left. Various other folks have built Collection wrappers that fake rows in a collection so they can insert group data items. Their renderers then detect that and draw themselves differently. Below is code from a two-line header where it showed a title on top and revenue/profit on the second row. private var revenue:UITextField; private var profit:UITextField; private var title:UITextField; override protected function createChildren():void { super.createChildren(); revenue = new UITextField(); revenue.text = "Revenue"; addChild(revenue); profit = new UITextField(); profit.text = "Profit"; addChild(profit); title = new UITextField(); addChild(title); } override protected function commitProperties():void { super.commitProperties(); var c:DataGridColumn = DataGridColumn(data); title.text = c.headerText; } override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void { super.updateDisplayList(unscaledWidth, unscaledHeight); revenue.setActualSize(unscaledWidth/2, unscaledHeight); revenue.move(0, unscaledHeight - 22); profit.setActualSize(unscaledWidth/2, unscaledHeight); profit.move(unscaledWidth/2, unscaledHeight - 22); title.move(unscaledWidth/2 - title.textWidth/2, 0); title.setActualSize(title.textWidth + 4, title.textHeight + 4); } -Alex ________________________________ From: [email protected] <mailto:[email protected]> [mailto:[email protected] <mailto:[email protected]> ] On Behalf Of leds usop Sent: Wednesday, January 31, 2007 10:48 PM To: [email protected] <mailto:[email protected]> Subject: Re: [flexcomponents] Best way to create a datagrid with collapsible grouped panels Have you considered using Grid instead as the base class instead of datagrid? --- Gareth Edwards <[EMAIL PROTECTED] <mailto:ghedwards%40gmail.com> > wrote: --------------------------------- So you've got some ideas on how to go about doing this? Cheers Gareth. Andrew D. Goodfellow wrote: Gareth, I was beginning to look into doing this as well. Perhaps we should worktogether on it? -Andy On 1/31/07, Gareth Edwards <[EMAIL PROTECTED] <mailto:ghedwards%40gmail.com> > wrote: Would like to attempt to extend the datagrid control to allowfor a number of things. If anyone has suggestions or snippets of code on how to make these possible, it would be much appreciated. 1) Panel type layout within the datagrid allowing for grouping and collapsing of datasets. 2) Extension of the grid header to allow for an additional customizable header row. Both the group headers and grid headers need to span the width of thegrid. If no one has done this before, suggestions would be much appreciated.I have started attempting to implement these features, but it seems the datagrid is some what more complex than other controls. Cheers Gareth. __________________________________________________________ Yahoo! Music Unlimited Access over 1 million songs. http://music.yahoo.com/unlimited <http://music.yahoo.com/unlimited>
