some mingw32 warnings fixed

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7670 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/combobox.cpp

@@ -225,8 +225,10 @@ bool wxComboBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 
 WXHWND wxComboBox::GetEditHWND() const
 {
-    if ( GetWindowStyle() & wxCB_READONLY )
+    // this function should not be called for wxCB_READONLY controls, it is
-        return NULL;
+    // the callers responsability to check this
+    wxASSERT_MSG( !(GetWindowStyle() & wxCB_READONLY),
+                  _T("read-only combobox doesn't have any edit control") );
 
     POINT pt;
     pt.x = pt.y = 4;

src/msw/frame.cpp

@@ -417,39 +417,40 @@ void wxFrame::PositionStatusBar()
 
 void wxFrame::DetachMenuBar()
 {
-    if (m_frameMenuBar)
+    if ( m_frameMenuBar )
     {
         m_frameMenuBar->Detach();
         m_frameMenuBar = NULL;
     }
 }
 
-void wxFrame::SetMenuBar(wxMenuBar *menu_bar)
+void wxFrame::SetMenuBar(wxMenuBar *menubar)
 {
-    if (!menu_bar)
+    if ( !menubar )
     {
         DetachMenuBar();
-        //actually remove the menu from the frame
-        m_hMenu=NULL;
-        InternalSetMenuBar();
-        return;
-    }
 
+        // actually remove the menu from the frame
+        m_hMenu = (WXHMENU)0;
+        InternalSetMenuBar();
+    }
+    else // set new non NULL menu bar
+    {
         m_frameMenuBar = NULL;
 
         // Can set a menubar several times.
         // TODO: how to prevent a memory leak if you have a currently-unattached
         // menubar? wxWindows assumes that the frame will delete the menu (otherwise
         // there are problems for MDI).
-    if (menu_bar->GetHMenu())
+        if ( menubar->GetHMenu() )
         {
-        m_hMenu = menu_bar->GetHMenu();
+            m_hMenu = menubar->GetHMenu();
         }
         else
         {
-        menu_bar->Detach();
+            menubar->Detach();
 
-        m_hMenu = menu_bar->Create();
+            m_hMenu = menubar->Create();
 
             if ( !m_hMenu )
                 return;
@@ -457,31 +458,9 @@ void wxFrame::SetMenuBar(wxMenuBar *menu_bar)
 
         InternalSetMenuBar();
 
-    m_frameMenuBar = menu_bar;
+        m_frameMenuBar = menubar;
-    menu_bar->Attach(this);
+        menubar->Attach(this);
-
-#if 0 // Old code that assumes only one call of SetMenuBar per frame.
-    if (!menu_bar)
-    {
-        DetachMenuBar();
-        return;
     }
-
-    wxCHECK_RET( !menu_bar->GetFrame(), wxT("this menubar is already attached") );
-
-    if (m_frameMenuBar)
-        delete m_frameMenuBar;
-
-    m_hMenu = menu_bar->Create();
-
-    if ( !m_hMenu )
-        return;
-
-    InternalSetMenuBar();
-
-    m_frameMenuBar = menu_bar;
-    menu_bar->Attach(this);
-#endif
 }
 
 void wxFrame::InternalSetMenuBar()

src/msw/treectrl.cpp

@@ -2195,7 +2195,7 @@ bool wxTreeCtrl::MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result)
                     if ( tvhti.flags & TVHT_ONITEM )
                     {
                         event.m_item = (WXHTREEITEM) tvhti.hItem;
-                        eventType = hdr->code == NM_DBLCLK
+                        eventType = (int)hdr->code == NM_DBLCLK
                                     ? wxEVT_COMMAND_TREE_ITEM_ACTIVATED
                                     : wxEVT_COMMAND_TREE_ITEM_RIGHT_CLICK;
                     }