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added MSWAlwaysDrawBg() to account for controls such as sliders which must not draw background with transparent brush no matter what

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30934 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2004-12-11 23:34:15 +00:00
parent 9688700c97
commit c5c4c31e6c
2 changed files with 9 additions and 1 deletions
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8
include/wx/msw/control.h
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@@ -133,6 +133,14 @@ protected:
// common part of the 3 methods above // common part of the 3 methods above
WXHBRUSH MSWControlColorSolid(WXHDC pDC, wxColour colBg); WXHBRUSH MSWControlColorSolid(WXHDC pDC, wxColour colBg);
// another WM_CTLCOLOR-related function: if it returns false, we return
// NULL_BRUSH from MSWControlColor() to prevent the system from erasing the
// background at all
//
// override this function to return true for controls which do want to
// draw their background themselves
virtual bool MSWAlwaysDrawBg() const { return false; }
// this is a helper for the derived class GetClassDefaultAttributes() // this is a helper for the derived class GetClassDefaultAttributes()
// implementation: it returns the right colours for the classes which // implementation: it returns the right colours for the classes which
// contain something else (e.g. wxListBox, wxTextCtrl, ...) instead of // contain something else (e.g. wxListBox, wxTextCtrl, ...) instead of

2
src/msw/control.cpp
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@@ -371,7 +371,7 @@ WXHBRUSH wxControl::MSWControlColor(WXHDC pDC)
} }
#endif // wxUSE_UXTHEME #endif // wxUSE_UXTHEME
return ::GetStockObject(NULL_BRUSH); return MSWAlwaysDrawBg() ? 0 : ::GetStockObject(NULL_BRUSH);
} }
WXHBRUSH wxControl::MSWControlColorDisabled(WXHDC pDC) WXHBRUSH wxControl::MSWControlColorDisabled(WXHDC pDC)