added wxHtmlContainerCell::GetBackgroundColour (needed for e.g. widgets rendering)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17496 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/html/htmlcell.h

@@ -219,6 +219,9 @@ public:
     void SetMinHeight(int h, int align = wxHTML_ALIGN_TOP) {m_MinHeight = h; m_MinHeightAlign = align; m_LastLayout = -1;}
 
     void SetBackgroundColour(const wxColour& clr) {m_UseBkColour = TRUE; m_BkColour = clr;}
+    // returns background colour (of wxNullColour if none set), so that widgets can
+    // adapt to it:
+    wxColour GetBackgroundColour();
     void SetBorder(const wxColour& clr1, const wxColour& clr2) {m_UseBorder = TRUE; m_BorderColour1 = clr1, m_BorderColour2 = clr2;}
     virtual wxHtmlLinkInfo* GetLink(int x = 0, int y = 0) const;
     virtual const wxHtmlCell* Find(int condition, const void* param) const;