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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_APP_LIST_APP_LIST_H_
#define ASH_APP_LIST_APP_LIST_H_
#pragma once
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/timer.h"
#include "ui/aura/event_filter.h"
#include "ui/aura/root_window_observer.h"
#include "ui/compositor/layer_animation_observer.h"
#include "ui/views/widget/widget.h"
namespace ash {
class AppListView;
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 aura::RootWindowObserver,
public ui::ImplicitAnimationObserver,
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();
// Returns target visibility. This differs from IsVisible() if an animation
// is ongoing.
bool GetTargetVisibility() const { return is_visible_; }
// Returns app list window or NULL if it is not visible.
aura::Window* GetWindow();
private:
// Sets app list view. If we are in visible mode, start showing animation.
// Otherwise, we just close it.
void SetView(AppListView* view);
// Forgets the view.
void ResetView();
// Starts show/hide animation. ScheduleAnimation is the master who manages
// when to call sub animations. There are three sub animations: background
// dimming, browser windows scale/fade and app list scale/fade. The background
// dimming runs in parallel with the other two and spans the whole animation
// time. The rest sub animations run in two steps. On showing, the first step
// is browser windows scale-out and fade-out and the 2nd step is app list
// scale-in and fade-in. The 2nd step animation is started via a timer and
// there is is a little overlap between the two animations. Hiding animation
// is the reverse of the showing animation.
void ScheduleAnimation();
void ScheduleBrowserWindowsAnimationForContainer(aura::Window* container);
void ScheduleBrowserWindowsAnimation();
void ScheduleDimmingAnimation();
void ScheduleAppListAnimation();
// 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;
virtual ui::GestureStatus PreHandleGestureEvent(
aura::Window* target,
aura::GestureEvent* event) OVERRIDE;
// aura::RootWindowObserver overrides:
virtual void OnRootWindowResized(const aura::RootWindow* root,
const gfx::Size& old_size) OVERRIDE;
virtual void OnWindowFocused(aura::Window* window) OVERRIDE;
// ui::ImplicitAnimationObserver overrides:
virtual void OnImplicitAnimationsCompleted() OVERRIDE;
// views::Widget::Observer overrides:
virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
// Whether we should show or hide app list widget.
bool is_visible_;
// The AppListView this class manages, owned by its widget.
AppListView* view_;
// Timer to schedule the 2nd step animation, started when the first step
// animation is scheduled in ScheduleAnimation.
base::OneShotTimer<AppList> second_animation_timer_;
DISALLOW_COPY_AND_ASSIGN(AppList);
};
} // namespace internal
} // namespace ash
#endif // ASH_APP_LIST_APP_LIST_H_
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