better key handling for MSW and GTK (patch 1526666)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40579 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/combog.cpp

@@ -161,7 +161,7 @@ bool wxGenericComboControl::Create(wxWindow *parent,
     CreateTextCtrl( wxNO_BORDER, validator );
 
     // Add keyboard input handlers for main control and textctrl
-    InstallInputHandlers( true );
+    InstallInputHandlers();
 
     // Set background
     SetBackgroundStyle( wxBG_STYLE_CUSTOM ); // for double-buffering
@@ -321,6 +321,28 @@ void wxGenericComboControl::OnMouseEvent( wxMouseEvent& event )
 
 }
 
+bool wxGenericComboControl::IsKeyPopupToggle(const wxKeyEvent& event) const
+{
+    int keycode = event.GetKeyCode();
+    bool isPopupShown = IsPopupShown();
+
+    // This code is AFAIK appropriate for wxGTK.
+
+    if ( isPopupShown )
+    {
+        if ( keycode == WXK_ESCAPE ||
+             ( keycode == WXK_UP && event.AltDown() ) )
+            return true;
+    }
+    else
+    {
+        if ( keycode == WXK_DOWN && event.AltDown() )
+            return true;
+    }
+
+    return false;
+}
+
 #ifdef __WXUNIVERSAL__
 
 bool wxGenericComboControl::PerformAction(const wxControlAction& action,