On Wed, Jun 24, 2009 at 7:01 AM, Graeme Geldenhuys < grae...@opensoft.homeip.net> wrote:
> OK, I see what you mean... I improved the performance very slightly by > reducing the two for loops to a single one. I also updated the uses > clause to the latest revision of fpGUI Toolkit. I also removed all the > unnecessary .BeginDraw and .EndDraw calls. The whole HandlePaint method > that you override is alread wrapped in a begindraw..enddraw call for > double buffering support. > > Unfortunately I am not sure how to show the image while it is being > generated. How is this done in Delphi VCL or Lazarus LCL? > If I understand the problem correctly, then I am guessing that the paint event is not being called until after the loop is completed. In Delphi (and I think also in the LCL), if you have a time consuming loop, it is always wise to put an Application.ProcessMessages call in the loop so that the application yields a bit of time to process other application messages which may have been generated during the loop. Hope this helps, Alan
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