Add GetDrawable convenience function that returns m_bitmap

if the wxBitmap is monochrome or m_pixmap if the wxBitmap
is polichrome.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@20059 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/x11/bitmap.h

@@ -130,7 +130,9 @@ public:
 
     WXPixmap GetPixmap() const;
     WXPixmap GetBitmap() const;
-    
+
+    WXPixmap GetDrawable() const;
+
     WXDisplay *GetDisplay() const;
     
 protected:

src/x11/bitmap.cpp

@@ -1107,6 +1107,13 @@ WXPixmap wxBitmap::GetBitmap() const
     return M_BMPDATA->m_bitmap;
 }
 
+WXPixmap wxBitmap::GetDrawable() const
+{
+    wxCHECK_MSG( Ok(), (WXPixmap) NULL, wxT("invalid bitmap") );
+
+    return M_BMPDATA->m_bpp == 1 ? M_BMPDATA->m_bitmap : M_BMPDATA->m_pixmap;
+}
+
 WXDisplay *wxBitmap::GetDisplay() const
 {
     wxCHECK_MSG( Ok(), (WXDisplay*) NULL, wxT("invalid bitmap") );