[ wxwindows-Bugs-1691813 ] wxScreenDC doesn`t work

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Bugs item #1691813, was opened at 2007-03-31 02:09
Message generated for change (Comment added) made by smartgo
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Category: wxMac specific
Group: Platform specific
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: LesterZX (lesterzx)
Assigned to: Stefan Csomor (csomor)
Summary: wxScreenDC doesn`t work

Initial Comment:
not work at all, in wxSplitterWindow and wxAui also( sash and aui highlight ), but the same code perfectly work on win32.

after .Blit from wxScreenDC i have assert: 

/Paradigma/Developer_2/sources_Third_Party/wxWidgets/src/common/dcgraph.cpp(760): assert "wxAssertFailure" failed in DoBlit(): Cannot Blit. Unable to get contents of DC as bitmap.

I use Intel-Mac 10.4.4 and wxWidgets 2.8.0, P4 3.0HT, ATI Radeon x550, 512M,

for wxWidgets 2.8.2 it doesn`t work also

I have attach screenshot of xcode debugger window on assert

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Comment By: Anders Kierulf (smartgo)
Date: 2007-05-11 10:15

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Drawing TO wxScreenDC on Mac doesn't seem to work at all in wxWidgets
2.8.3. The following code works well on Windows but doesn't show anything
on Mac:

wxScreenDC dc;
dc.StartDrawingOnTop(this);
wxBrush brush(*wxBLACK, wxCROSS_HATCH);
dc.SetLogicalFunction(wxINVERT);
dc.SetBrush(brush);
dc.DrawRectangle(bounds.x, bounds.y, bounds.width, bounds.height);
dc.EndDrawingOnTop();

Any ideas how to fix this?

Thanks,
  Anders

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Comment By: zxfox (zxfox)
Date: 2007-04-02 00:06

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ok, thanks for a fast reply

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Comment By: Stefan Csomor (csomor)
Date: 2007-04-01 23:52

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blitting FROM the screen is not supported when building using Quartz
anymore right now (workaround would be to set this to 0, not using graphics
either), I thought I had adapted wxSplitterWindow to use the wxOverlay
class which is the substitute for these situations, I'll have a look at it
as soon as I get the time to do so

Thanks,

Stefan

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