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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef ASH_COMMON_WALLPAPER_WALLPAPER_WIDGET_CONTROLLER_H_ | |
6 #define ASH_COMMON_WALLPAPER_WALLPAPER_WIDGET_CONTROLLER_H_ | |
7 | |
8 #include <memory> | |
9 | |
10 #include "ash/ash_export.h" | |
11 #include "base/macros.h" | |
12 #include "ui/aura/window_observer.h" | |
13 #include "ui/views/widget/widget_observer.h" | |
14 | |
15 namespace ash { | |
16 | |
17 class RootWindowController; | |
18 class WmWindow; | |
19 | |
20 // This class implements a widget-based wallpaper. | |
21 // WallpaperWidgetController is owned by RootWindowController. | |
22 // When the animation completes the old WallpaperWidgetController is | |
23 // destroyed. Exported for tests. | |
24 class ASH_EXPORT WallpaperWidgetController : public views::WidgetObserver, | |
25 public aura::WindowObserver { | |
26 public: | |
27 explicit WallpaperWidgetController(views::Widget* widget); | |
28 ~WallpaperWidgetController() override; | |
29 | |
30 // Overridden from views::WidgetObserver. | |
31 void OnWidgetDestroying(views::Widget* widget) override; | |
32 | |
33 // Set bounds for the widget that draws the wallpaper. | |
34 void SetBounds(const gfx::Rect& bounds); | |
35 | |
36 // Move the wallpaper for |root_window| to the specified |container|. | |
37 // The lock screen moves the wallpaper container to hides the user's windows. | |
38 // Returns true if there was something to reparent. | |
39 bool Reparent(WmWindow* root_window, int container); | |
40 | |
41 // Starts wallpaper fade in animation. |root_window_controller| is | |
42 // the root window where the animation will happen. (This is | |
43 // necessary this as |layer_| doesn't have access to the root window). | |
44 void StartAnimating(RootWindowController* root_window_controller); | |
45 | |
46 views::Widget* widget() { return widget_; } | |
47 | |
48 private: | |
49 void RemoveObservers(); | |
50 | |
51 // aura::WindowObserver: | |
52 void OnWindowBoundsChanged(aura::Window* window, | |
53 const gfx::Rect& old_bounds, | |
54 const gfx::Rect& new_bounds) override; | |
55 | |
56 views::Widget* widget_; | |
57 | |
58 // Parent of |widget_|. | |
59 WmWindow* widget_parent_; | |
60 | |
61 DISALLOW_COPY_AND_ASSIGN(WallpaperWidgetController); | |
62 }; | |
63 | |
64 // This class wraps a WallpaperWidgetController pointer. It is owned | |
65 // by RootWindowController. The instance of WallpaperWidgetController is | |
66 // moved to this RootWindowController when the animation completes. | |
67 // Exported for tests. | |
68 class ASH_EXPORT AnimatingWallpaperWidgetController { | |
69 public: | |
70 explicit AnimatingWallpaperWidgetController( | |
71 WallpaperWidgetController* component); | |
72 ~AnimatingWallpaperWidgetController(); | |
73 | |
74 // Stops animation and makes sure OnImplicitAnimationsCompleted() is called if | |
75 // current animation is not finished yet. | |
76 // Note we have to make sure this function is called before we set | |
77 // AnimatingWallpaperWidgetController to a new controller. If it is not | |
78 // called, the animating widget/layer is closed immediately and the new one is | |
79 // animating from the widget/layer before animation. For instance, if a user | |
80 // quickly switches between red, green and blue wallpapers. The green | |
81 // wallpaper will first fade in from red wallpaper. And in the middle of the | |
82 // animation, blue wallpaper also wants to fade in. If the green wallpaper | |
83 // animation does not finish immediately, the green wallpaper widget will be | |
84 // removed and the red widget will show again. As a result, the blue wallpaper | |
85 // fades in from red wallpaper. This is a bad user experience. See bug | |
86 // http://crbug.com/156542 for more details. | |
87 void StopAnimating(); | |
88 | |
89 // Gets the wrapped WallpaperWidgetController pointer. Caller should | |
90 // take ownership of the pointer if |pass_ownership| is true. | |
91 WallpaperWidgetController* GetController(bool pass_ownership); | |
92 | |
93 private: | |
94 std::unique_ptr<WallpaperWidgetController> controller_; | |
95 | |
96 DISALLOW_COPY_AND_ASSIGN(AnimatingWallpaperWidgetController); | |
97 }; | |
98 | |
99 } // namespace ash | |
100 | |
101 #endif // ASH_COMMON_WALLPAPER_WALLPAPER_WIDGET_CONTROLLER_H_ | |
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