Cannot draw on wxMemoryDC using colour 0xc0c0c0

[chris elliott]

This is not a great surprise; look at the note in src/msw/window.cpp 
about line 4336, about reserving this colour as a mask

chris

Leslie Newell wrote:
> Hi, I have just hit a really strange problem with wxMemoryDC. I am 
> trying to draw a simple rectangle on a wxBitmap using wxMemoryDC. It 
> works fine if I use any colour other than 0xc0c0c0. For instance 
> 0xc1c1c1, 0xbfbfbf or 0xc0c0c1 work with no problems. Below is the code 
> I am using:
> 
>    size_t nCheckWidth  = wxOwnerDrawn::GetDefaultMarginWidth(),
>           nCheckHeight = wxOwnerDrawn::GetDefaultMarginWidth();
>    wxBitmap bmp(nCheckWidth + 1,nCheckHeight +1);
>    wxMemoryDC dc(bmp);
>    wxColour bkCol = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
>    wxBrush bkBrush(bkCol);
>    dc.SetBackground(bkBrush);
>    dc.Clear();
>    dc.SetBrush(*wxTRANSPARENT_BRUSH);
>    dc.SetPen(wxPen(wxColour(0xc0,0xc0,0xc0)));
>    dc.DrawRectangle(1,1, nCheckWidth-2, nCheckHeight-2);
>    return(bmp);
> 
> wxWidgets 2.8.6, MSW, compiled with msvc (Visual Studio 2005)
> 
> Les
> 
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