Refactor owner-drawing code.

Only keep common code in the base class and extract all menu/listbox-specific
stuff into derived classes.

This makes the code cleaner and more maintainable but introduces some problems
in wxCheckListBox appearance which will be fixed by the next patch.

Closes #10635.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63220 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/os2/menuitem.h

@@ -23,7 +23,8 @@
 // headers - only because ownerdrw.h is not always included and I don't want
 // to write #ifdef's everywhere...
 #if wxUSE_OWNER_DRAWN
-    #include  "wx/ownerdrw.h"
+    #include "wx/ownerdrw.h"
+    #include "wx/bitmap.h"
 #endif
 
 // ----------------------------------------------------------------------------
@@ -66,7 +67,6 @@ public:
     // Override base class virtuals
     //
     virtual void SetItemLabel(const wxString& rStrName);
-    virtual void SetCheckable(bool bCheckable);
 
     virtual void Enable(bool bDoEnable = true);
     virtual void Check(bool bDoCheck = true);
@@ -97,6 +97,48 @@ public:
     //
     MENUITEM                        m_vMenuData;
 
+#if wxUSE_OWNER_DRAWN
+
+    void SetBitmaps(const wxBitmap& bmpChecked,
+                    const wxBitmap& bmpUnchecked = wxNullBitmap)
+    {
+        m_bmpChecked = bmpChecked;
+        m_bmpUnchecked = bmpUnchecked;
+        SetOwnerDrawn(true);
+    }
+
+    void SetBitmap(const wxBitmap& bmp, bool bChecked = true)
+    {
+        if ( bChecked )
+            m_bmpChecked = bmp;
+        else
+            m_bmpUnchecked = bmp;
+        SetOwnerDrawn(true);
+    }
+
+    void SetDisabledBitmap(const wxBitmap& bmpDisabled)
+    {
+        m_bmpDisabled = bmpDisabled;
+        SetOwnerDrawn(true);
+    }
+
+    const wxBitmap& GetBitmap(bool bChecked = true) const
+        { return (bChecked ? m_bmpChecked : m_bmpUnchecked); }
+
+    const wxBitmap& GetDisabledBitmap() const
+        { return m_bmpDisabled; }
+
+
+    // override wxOwnerDrawn base class virtuals
+    virtual wxString GetName() const;
+    virtual bool OnMeasureItem(size_t *pwidth, size_t *pheight);
+    virtual bool OnDrawItem(wxDC& dc, const wxRect& rc, wxODAction act, wxODStatus stat);
+
+protected:
+    virtual void GetFontToUse(wxFont& font) const;
+
+#endif // wxUSE_OWNER_DRAWN
+
 private:
     void Init();
 
@@ -117,6 +159,13 @@ private:
     //
     bool                            m_bIsRadioGroupStart;
 
+#if wxUSE_OWNER_DRAWN
+    // item bitmaps
+    wxBitmap m_bmpChecked,     // bitmap to put near the item
+             m_bmpUnchecked,   // (checked is used also for 'uncheckable' items)
+             m_bmpDisabled;
+#endif // wxUSE_OWNER_DRAWN
+
     DECLARE_DYNAMIC_CLASS(wxMenuItem)
 }; // end of CLASS wxMenuItem