XRC: ability to create wxButton with wxBitmapBundle

docs/doxygen/overviews/xrc_format.h

@@ -912,7 +912,9 @@ Example:
 @row3col{label, @ref overview_xrcformat_type_text,
     Label to display on the button (may be omitted if only the bitmap or stock ID is used).}
 @row3col{bitmap, @ref overview_xrcformat_type_bitmap,
-    Bitmap to display in the button (optional).}
+    Bitmap to display in the button (optional). Mutually exclusive with @c bitmaps.}
+@row3col{bitmaps, @ref overview_xrcformat_type_bitmaps,
+    BitmapBundle to display in the button (optional). Mutually exclusive with @c bitmap.}
 @row3col{bitmapposition, @c wxLEFT|wxRIGHT|wxTOP|wxBOTTOM,
     Position of the bitmap in the button, see wxButton::SetBitmapPosition() (default: wxLEFT).}
 @row3col{default, @ref overview_xrcformat_type_bool,

misc/schema/xrc_schema.rnc

@@ -742,7 +742,10 @@ wxButton =
         stdObjectNodeAttributes &
         stdWindowProperties &
         [xrc:p="o"] element label          {_, t_text }* &
-        [xrc:p="o"] element bitmap         {_, t_bitmap }* &
+        [xrc:p="o"](
+           element bitmap {_, t_bitmap } |
+           element bitmaps {_, t_bitmaps }
+        )* &
         [xrc:p="o"] element bitmapposition {_, t_direction }* &
         [xrc:p="o"] element default        {_, t_bool }*
     }

src/xrc/xh_bttn.cpp

@@ -47,10 +47,10 @@ wxObject *wxButtonXmlHandler::DoCreateResource()
     if (GetBool(wxT("default"), 0))
         button->SetDefault();
 
-    if ( GetParamNode("bitmap") )
+    wxBitmapBundle bb = GetBitmapOrBitmaps("bitmap", "bitmaps", wxART_BUTTON);
+    if ( bb.IsOk() )
     {
-        button->SetBitmap(GetBitmap("bitmap", wxART_BUTTON),
-                          GetDirection("bitmapposition"));
+        button->SetBitmap(bb);
     }
 
     SetupWindow(button);