fixes for wxEvent and wxKeyEvent operator=()

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12482 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/event.h

@@ -372,6 +372,9 @@ public:
     bool              m_isCommandEvent;
 
 private:
+    // normally copying the events is a bad idea, so disable this
+    wxEvent& operator=(const wxEvent&);
+
     DECLARE_ABSTRACT_CLASS(wxEvent)
 };
 
@@ -809,6 +812,24 @@ public:
 
     virtual wxEvent *Clone() const { return new wxKeyEvent(*this); }
 
+    // we do need to copy wxKeyEvent sometimes (in wxTreeCtrl code, for
+    // example)
+    wxKeyEvent& operator=(const wxKeyEvent& evt)
+    {
+        m_x = evt.m_x;
+        m_y = evt.m_y;
+
+        m_keyCode = evt.m_keyCode;
+
+        m_controlDown = evt.m_controlDown;
+        m_shiftDown = evt.m_shiftDown;
+        m_altDown = evt.m_altDown;
+        m_metaDown = evt.m_metaDown;
+        m_scanCode = evt.m_scanCode;
+
+        return *this;
+    }
+
 public:
     wxCoord       m_x, m_y;