implement changing wxChoice and wxComboBox height

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60461 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/choice.h

@@ -92,7 +92,11 @@ protected:
     virtual wxBorder GetDefaultBorder() const { return wxBORDER_NONE; }
 
     // common part of all ctors
-    void Init() { m_lastAcceptedSelection = wxID_NONE; }
+    void Init()
+    {
+        m_lastAcceptedSelection = wxID_NONE;
+        m_heightOwn = wxDefaultCoord;
+    }
 
     virtual void DoDeleteOneItem(unsigned int n);
     virtual void DoClear();
@@ -114,7 +118,10 @@ protected:
 
     // update the height of the drop down list to fit the number of items we
     // have (without changing the visible height)
-    void UpdateVisibleHeight();
+    void MSWUpdateDropDownHeight();
+
+    // set the height of the visible part of the control to m_heightOwn
+    void MSWUpdateVisibleHeight();
 
     // create and initialize the control
     bool CreateAndInit(wxWindow *parent, wxWindowID id,
@@ -128,12 +135,18 @@ protected:
     // free all memory we have (used by Clear() and dtor)
     void Free();
 
+#if wxUSE_DEFERRED_SIZING
+    virtual void MSWEndDeferWindowPos();
+#endif // wxUSE_DEFERRED_SIZING
 
     // last "completed" selection, i.e. not the transient one while the user is
     // browsing the popup list: this is only used when != wxID_NONE which is
     // the case while the drop down is opened
     int m_lastAcceptedSelection;
 
+    // the height of the control itself if it was set explicitly or
+    // wxDefaultCoord if it hadn't
+    int m_heightOwn;
 
     DECLARE_DYNAMIC_CLASS_NO_COPY(wxChoice)
 };