[haiku-development] Re: Scrolling with child views - bug or feature?
- From: "Ingo Weinhold" <ingo_weinhold@xxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Fri, 17 Jul 2009 16:42:43 +0200
-------- Original-Nachricht --------
> Datum: Fri, 17 Jul 2009 16:12:35 +0200
> Von: Stephan Assmus <superstippi@xxxxxx>
> On 2009-07-17 at 14:40:19 [+0200], Rene Gollent <anevilyak@xxxxxxxxx>
> wrote:
> > On Fri, Jul 17, 2009 at 7:27 AM, Axel Dörfler<axeld@xxxxxxxxxxxxxxxx>
> > wrote:
> > > Sure, but isn't that just view->Frame() + parent->Bounds().LeftTop()
> > > (ie. its scroll offset)?
> >
> > As far as I can see, no:
> >
> > Child Frame: BRect(l:41.0, t:0.0, r:939.0, b:31214.0) Child Bounds:
> > BRect(l:0.0, t:0.0, r:898.0, b:31214.0) Parent Bounds: BRect(l:0.0,
> > t:844.0, r:560.0, b:1195.0)
>
> Yes, but this is the correct behaviour. To get the true view port, you
> would have to do something like this:
>
> BRect visibleRect = Frame();
> visibleRect &= parent->Bounds();
> ConvertFromParent(&visibleRect);
IMO for this to have any meaning in any other than the "my parent is a child of
a scroll view" case, one would have to recursively consider all ancestors up to
the window.
CU, Ingo
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