added SetHoverBitmap() and implemented it under wxMSW; extended the docs

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@36069 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/bmpbuttn.h

@@ -44,16 +44,20 @@ public:
         { m_bmpFocus = focus; OnSetBitmap(); };
     void SetBitmapDisabled(const wxBitmap& disabled)
         { m_bmpDisabled = disabled; OnSetBitmap(); };
+    void SetBitmapHover(const wxBitmap& hover)
+        { m_bmpHover = hover; OnSetBitmap(); }
 
     // retrieve the bitmaps
     const wxBitmap& GetBitmapLabel() const { return m_bmpNormal; }
     const wxBitmap& GetBitmapSelected() const { return m_bmpSelected; }
     const wxBitmap& GetBitmapFocus() const { return m_bmpFocus; }
     const wxBitmap& GetBitmapDisabled() const { return m_bmpDisabled; }
+    const wxBitmap& GetBitmapHover() const { return m_bmpHover; }
     wxBitmap& GetBitmapLabel() { return m_bmpNormal; }
     wxBitmap& GetBitmapSelected() { return m_bmpSelected; }
     wxBitmap& GetBitmapFocus() { return m_bmpFocus; }
     wxBitmap& GetBitmapDisabled() { return m_bmpDisabled; }
+    wxBitmap& GetBitmapHover() { return m_bmpHover; }
 
     // set/get the margins around the button
     virtual void SetMargins(int x, int y) { m_marginX = x; m_marginY = y; }
@@ -78,7 +82,8 @@ protected:
     wxBitmap m_bmpNormal,
              m_bmpSelected,
              m_bmpFocus,
-             m_bmpDisabled;
+             m_bmpDisabled,
+             m_bmpHover;
 
     // the margins around the bitmap
     int m_marginX,

include/wx/msw/bmpbuttn.h

@@ -16,9 +16,7 @@
 #include "wx/bitmap.h"
 #include "wx/brush.h"
 
-#define wxDEFAULT_BUTTON_MARGIN 4
-
-class WXDLLEXPORT wxBitmapButton: public wxBitmapButtonBase
+class WXDLLEXPORT wxBitmapButton : public wxBitmapButtonBase
 {
 public:
     wxBitmapButton() { }
@@ -58,6 +56,9 @@ protected:
     // invalidate m_brushDisabled when system colours change
     void OnSysColourChanged(wxSysColourChangedEvent& event);
 
+    // change the currently bitmap if we have a hover one
+    void OnMouseEnterOrLeave(wxMouseEvent& event);
+
 
     // the brush we use to draw disabled buttons
     wxBrush m_brushDisabled;
@@ -67,5 +68,4 @@ protected:
     DECLARE_DYNAMIC_CLASS_NO_COPY(wxBitmapButton)
 };
 
-#endif
-    // _WX_BMPBUTTN_H_
+#endif // _WX_BMPBUTTN_H_