0. extracted toolbar colour mapping stuff to its own function

1. wxToolBar adjusts the colours properly when the system colours change
2. wxImageList uses light grey as the transparent colour for the bitmaps


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@13558 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/private.h

@@ -212,6 +212,31 @@ inline void wxRGBToColour(wxColour& c, COLORREF rgb)
     c.Set(GetRValue(rgb), GetGValue(rgb), GetBValue(rgb));
 }
 
+// get the standard colour map for some standard colours - see comment in this
+// function to understand why is it needed and when should it be used
+//
+// it returns a wxCOLORMAP (can't use COLORMAP itself here as comctl32.dll
+// might be not included/available) array of size wxSTD_COLOUR_MAX
+//
+// NB: if you change these colours, update wxBITMAP_STD_COLOURS in the
+//     resources as well: it must have the same number of pixels!
+enum wxSTD_COLOUR
+{
+    wxSTD_COL_BTNTEXT,
+    wxSTD_COL_BTNSHADOW,
+    wxSTD_COL_BTNFACE,
+    wxSTD_COL_BTNHIGHLIGHT,
+    wxSTD_COL_MAX,
+};
+
+struct WXDLLEXPORT wxCOLORMAP
+{
+    COLORREF from, to;
+};
+
+// this function is implemented in src/msw/window.cpp
+extern wxCOLORMAP *wxGetStdColourMap();
+
 // copy Windows RECT to our wxRect
 inline void wxCopyRECTToRect(const RECT& r, wxRect& rect)
 {