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// Copyright (c) 2012 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 ASH_WM_WINDOW_MODALITY_CONTROLLER_H_
#define ASH_WM_WINDOW_MODALITY_CONTROLLER_H_
#include <vector>
#include "ash/ash_export.h"
#include "base/compiler_specific.h"
#include "ui/aura/env_observer.h"
#include "ui/aura/event_filter.h"
#include "ui/aura/window_observer.h"
namespace aura {
class LocatedEvent;
}
namespace ash {
namespace wm {
// Returns the window-modal transient child of |window|, or NULL if |window|
// does not have any window-modal transient children.
ASH_EXPORT aura::Window* GetWindowModalTransient(aura::Window* window);
}
namespace internal {
// WindowModalityController is an event filter that consumes events sent to
// windows that are the transient parents of window-modal windows. This filter
// must be added to the CompoundEventFilter so that activation works properly.
class WindowModalityController : public aura::EventFilter,
public aura::EnvObserver,
public aura::WindowObserver {
public:
WindowModalityController();
virtual ~WindowModalityController();
// Overridden from aura::EventFilter:
virtual bool PreHandleKeyEvent(aura::Window* target,
aura::KeyEvent* event) OVERRIDE;
virtual bool PreHandleMouseEvent(aura::Window* target,
aura::MouseEvent* event) OVERRIDE;
virtual ui::TouchStatus PreHandleTouchEvent(aura::Window* target,
aura::TouchEvent* event) OVERRIDE;
virtual ui::GestureStatus PreHandleGestureEvent(
aura::Window* target,
aura::GestureEvent* event) OVERRIDE;
// Overridden from aura::EnvObserver:
virtual void OnWindowInitialized(aura::Window* window) OVERRIDE;
// Overridden from aura::WindowObserver:
virtual void OnWindowVisibilityChanged(aura::Window* window,
bool visible) OVERRIDE;
virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
private:
// Processes a mouse/touch event, and returns true if the event should be
// consumed.
bool ProcessLocatedEvent(aura::Window* target,
aura::LocatedEvent* event);
std::vector<aura::Window*> windows_;
DISALLOW_COPY_AND_ASSIGN(WindowModalityController);
};
} // namespace internal
} // namespace ash
#endif // ASH_WM_WINDOW_MODALITY_CONTROLLER_H_