virtual wxBitmap GetSubBitmap(const wxRect& rect) const = 0;
// Convert to disabled (dimmed) bitmap.
- wxBitmap ConvertToDisabled(unsigned char brightness = 255);
+ wxBitmap ConvertToDisabled(unsigned char brightness = 255) const;
virtual bool SaveFile(const wxString &name, wxBitmapType type,
const wxPalette *palette = NULL) const = 0;