I saw the invalidateDisplayList flag being used in other components, but I don't think I can access it (it's mx_internal). I'll try overriding the invalidateSize() function and see if that works.
Thanks, Derek --- In [email protected], "Alex Harui" <[EMAIL PROTECTED]> wrote: > > One way is to override invalidateSize() and have them do nothing when > your renderers are at work. > > > > In updateDisplayList, invalidateDisplayListFlag should still be set so > that calls to invalidateDisplayList() don't do anything. I think in > addChild it calls invalidateSize() which restarts the loop. You can > always override invalidateDisplayList() as well. > > > > ________________________________ > > From: [email protected] > [mailto:[EMAIL PROTECTED] On Behalf Of Derek Adams > Sent: Saturday, April 19, 2008 6:29 PM > To: [email protected] > Subject: [flexcomponents] Re: Drawing text on a component without adding > subcomponents > > > > I have a component that hands off rendering its graphics to a chain > of pluggable renderers. The way I have it implemented right now, the > chain is being executed in the overridden updateDisplayList function. > The problem that I run into is when a renderer tries to add a child > to the parent container, it generates an infinite loop due to > addChild forcing an invalidateDisplayList(). Since I don't really > need to interact with the text fields, I figured that drawing the > bitmaps would be a usable solution. If you know a way to get around > the infinite loop problem though, I would rather just be able to add > components via the renderers. I know you would normally add children > in the createChildren() function, but the renderers decide what gets > added and the parent component has no knowledge of their internals. > > Thanks for your help! > Derek > > --- In [email protected] > <mailto:flexcomponents%40yahoogroups.com> , "Alex Harui" <aharui@> > wrote: > > > > Looks right to me. Those are the rules today. Why is having a > child > > TextField so bad? The Bitmaps can be expensive. > > > > > > > > ________________________________ > > > > From: [email protected] > <mailto:flexcomponents%40yahoogroups.com> > > [mailto:[email protected] > <mailto:flexcomponents%40yahoogroups.com> ] On Behalf Of Derek Adams > > Sent: Saturday, April 19, 2008 10:07 AM > > To: [email protected] > <mailto:flexcomponents%40yahoogroups.com> > > Subject: [flexcomponents] Drawing text on a component without adding > > subcomponents > > > > > > > > I have a custom component that needs to be able to paint a label on > > its graphics context without adding a subcomponent for it. I > figured > > out a way to do it, but it seems like a hack. Does anybody know a > > better way? Here is the code. > > > > // Create an auto-sized text field. > > var label:IUITextField = new UITextField(); > > label.autoSize = TextFieldAutoSize.LEFT; > > label.text = "String I want to render"; > > > > // Draw the text into a bitmap. > > var bm:BitmapData = new BitmapData(label.width, label.height); > > bm.draw(label); > > > > // Draw bitmap on the graphics of the component. > > comp.graphics.beginBitmapFill(bm, null, false); > > comp.graphics.drawRect(0, 0, bm.width, bm.height); > > comp.graphics.endFill(); > > > > Any ideas? > > > > Thanks, > > Derek > > >
