Dislaying popup tip windows seems to work right now.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15766 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk1/popupwin.cpp

@@ -149,6 +149,12 @@ END_EVENT_TABLE()
 
 IMPLEMENT_DYNAMIC_CLASS(wxPopupWindow, wxWindow)
 
+wxPopupWindow::~wxPopupWindow()
+{
+    if (GTK_WIDGET_HAS_GRAB(m_widget))
+        gtk_grab_remove( m_widget );
+}
+
 bool wxPopupWindow::Create( wxWindow *parent, int style )
 {
     m_needParent = FALSE;
@@ -342,9 +348,15 @@ bool wxPopupWindow::Show( bool show )
 
         GtkOnSize( m_x, m_y, m_width, m_height );
     }
-
+    
+    if (!show)
+        gtk_grab_remove( m_widget );
+    
     bool ret = wxWindow::Show( show );
-
+    
+    if (show)
+        gtk_grab_add( m_widget );
+    
     return ret;
 }