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added MSWGetDefaultBgBrush() to allow some derived classes to use transparent brush for erasing background

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git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@30969 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2004-12-12 19:44:52 +00:00
parent 98a50e202c
commit d34e375c9c
2 changed files with 10 additions and 1 deletions
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9
include/wx/msw/control.h
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@@ -133,6 +133,15 @@ 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: override this to return the brush
// which should be used to paint the control background by default
//
// for most controls, the default behaviour of returning 0 and letting the
// system do it is correct, but for some -- e.g. checkboxes -- we actually
// have to return transparent brush from here to prevent the system from
// overwriting background with solid colour
virtual WXHBRUSH MSWGetDefaultBgBrush() { return 0; }
// 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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@@ -382,7 +382,7 @@ WXHBRUSH wxControl::MSWControlColor(WXHDC pDC)
#endif // wxUSE_UXTHEME #endif // wxUSE_UXTHEME
// let the control deal with background itself // let the control deal with background itself
return 0; return MSWGetDefaultBgBrush();
} }
WXHBRUSH wxControl::MSWControlColorDisabled(WXHDC pDC) WXHBRUSH wxControl::MSWControlColorDisabled(WXHDC pDC)