On Sat, 05 Jan 2013 08:32:54 +0000 Martin <laza...@mfriebe.de> wrote:
> On 05/01/2013 01:06, Mattias Gaertner wrote: > > On Sat, 5 Jan 2013 00:47:38 +0100 > > Bart <bartjun...@gmail.com> wrote: > > > >> On 1/4/13, Mattias Gaertner <nc-gaert...@netcologne.de> wrote: > >> > >>> It sounds like a bug in the LCL Win32 interface. > >>> I don't have win32 here to test. > >>> There should be no Paint events during your code. Are there? > >> How do I test this? > > Set the OnPaint event of the synedit and add a debugln. > > > > > > Just for reference, I did some tests on Win Vista 32 bit > > s:=PageControl1.AddTabSheet; > l := TSynEdit.Create(self); > l.Align := alClient; > l.Parent := s; > PageControl1.ActivePage := s; > > ActivePage will trigger painting, but it first aligns the SynEdit, so I > get a correct display. Does "trigger" means immediate paint or a normal queued message? There should be no immediate paints. Except those explicitly forced by the user code. > s:=PageControl1.AddTabSheet; > PageControl1.ActivePage := s; > l := TSynEdit.Create(self); > l.Align := alClient; > l.Parent := s; > > - again ActivePage causes painting, but synEdit is not existent yet- > - l.Parent := s; causes SynEdit to be correctly resized. Also paints > the SynEdit's Scrollbars (does not call synEdit paint, only scrollbars / > Scrollbars cover client area) > > and therefore finally > > s:=PageControl1.AddTabSheet; > PageControl1.ActivePage := s; // paint tabsheet > l := TSynEdit.Create(self); > l.Parent := s; // paint scrollbars, not > yet aligned > l.Align := alClient; // paint scrollbars > (again), this time aligned. Since synedit itself does not yet paint, the > previous painted scrollbars remain a visible image It seems the Win32 intf triggers immediate paints. Maybe some win32 developer can explain why. Mattias -- _______________________________________________ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
