Fix for the fact that unmapped but managed widgets

intercept mouse events even if they are not visible. (backport)
  Set/reset MappedWhenManaged flag when showing/hiding a window,
otherwise, since some common operations (moving, adding items to a
listbox, ...) do a Unmanage-Manage pair, calling Hide and then
(for example) SetSize would show the window again. (backport)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@20468 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/motif/window.cpp

@@ -179,9 +179,22 @@ bool wxWindow::MapOrUnmap(WXWidget widget, bool map)
         return FALSE;
 
     if ( map )
+    {
+        XtManageChild(w);
         XtMapWidget(w);
+    }
     else
+    {
         XtUnmapWidget(w);
+        XtUnmanageChild(w);
+    }
+
+    //   Rationale: a lot of common operations (including but not
+    // limited to moving, resizing and appending items to a listbox)
+    // unmamange the widget, do their work, then manage it again.
+    // This means that, for example adding an item to a listbox will show it,
+    // or that most controls are shown every time they are moved or resized!
+    XtSetMappedWhenManaged( w, map );
 
     return TRUE;
 }