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// 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_SHELL_APP_LIST_APP_LIST_H_
#define UI_AURA_SHELL_APP_LIST_APP_LIST_H_
#pragma once
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/weak_ptr.h"
#include "ui/aura/event_filter.h"
#include "ui/gfx/compositor/layer_animation_observer.h"
#include "ui/views/widget/widget.h"
namespace aura_shell {
namespace internal {
// AppList is a controller that manages app list UI for shell. To show the UI,
// it requests app list widget from ShellDelegate and shows it when ready.
// While the UI is visible, it monitors things such as app list widget's
// activation state and desktop mouse click to auto dismiss the UI.
class AppList : public aura::EventFilter,
public ui::LayerAnimationObserver,
public views::Widget::Observer {
public:
AppList();
virtual ~AppList();
// Show/hide app list window.
void SetVisible(bool visible);
// Whether app list window is visible (shown or being shown).
bool IsVisible();
private:
// Sets app list widget. If we are in visible mode, start showing animation.
// Otherwise, we just close the widget.
void SetWidget(views::Widget* widget);
// Forgets the widget.
void ResetWidget();
// Starts show/hide animation.
void ScheduleAnimation();
// aura::EventFilter overrides:
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;
// ui::LayerAnimationObserver overrides:
virtual void OnLayerAnimationEnded(
const ui::LayerAnimationSequence* sequence) OVERRIDE;
virtual void OnLayerAnimationAborted(
const ui::LayerAnimationSequence* sequence) OVERRIDE;
virtual void OnLayerAnimationScheduled(
const ui::LayerAnimationSequence* sequence) OVERRIDE;
// views::Widget::Observer overrides:
virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
virtual void OnWidgetActivationChanged(views::Widget* widget,
bool active) OVERRIDE;
// Whether we should show or hide app list widget.
bool is_visible_;
// App list widget we get from ShellDelegate.
views::Widget* widget_;
// A weak ptr factory for callbacks that ShellDelegate used to set widget.
base::WeakPtrFactory<AppList> set_widget_factory_;
DISALLOW_COPY_AND_ASSIGN(AppList);
};
} // namespace internal
} // namespace aura_shell
#endif // UI_AURA_SHELL_APP_LIST_APP_LIST_H_
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