Better Z-index support.

ui/aura/event_filter.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_AURA_EVENT_FILTER_H_
+#define UI_AURA_EVENT_FILTER_H_
+#pragma once
+
+#include "base/logging.h"
+#include "ui/gfx/point.h"

[tfarina, 2011/09/20 02:18:01]

remove these two unused includes and include basictypes instead for DISALLOW
macro?

+
+namespace aura {
+
+class Window;
+class MouseEvent;
+
+// An object that filters events sent to an owner window, potentially performing
+// adjustments to the window's position, size and z-index.
+class EventFilter {
+ public:
+  explicit EventFilter(Window* owner);
+  virtual ~EventFilter();
+
+  // Try to handle |event| (before the owner's delegate gets a chance to).
+  // Returns true if the event was handled by the WindowManager and should not
+  // be forwarded to the owner's delegate.
+  virtual bool OnMouseEvent(Window* target, MouseEvent* event);
+
+ protected:
+  Window* owner() { return owner_; }

[oshima, 2011/09/20 05:29:28]

const

+
+ private:
+  Window* owner_;
+
+  DISALLOW_COPY_AND_ASSIGN(EventFilter);
+};
+
+}  // namespace aura
+
+#endif  // UI_AURA_EVENT_FILTER_H_