1. wxTextCtrl::SetBackgroundColour() now works

2. wxListBox::SetBackgroundColour() now does something, although still not
   what I'd like
3. wxColour() now has a ctor from "const char *" to allow calls like
   SetBackgroundColour("green");
4. controls sample modified to use colors


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@872 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/listbox.cpp

@@ -445,4 +445,10 @@ bool wxListBox::IsOwnGtkWindow( GdkWindow *window )
   return FALSE;
 }
 
+void wxListBox::SetBackgroundColour(const wxColour &colour)
+{
+  wxCHECK_RET( m_list != NULL, "invalid list ctrl" );
+
+  SetBackgroundColourHelper( colour, GTK_WIDGET(m_list)->window );
+}