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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_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_WIDGET_CONTROLLER_H_ | |
| 6 #define ASH_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_WIDGET_CONTROLLER_H_ | |
| 7 | |
| 8 #include <memory> | |
| 9 | |
| 10 #include "ash/ash_export.h" | |
| 11 #include "ash/common/wm_window_observer.h" | |
| 12 #include "base/macros.h" | |
| 13 #include "ui/views/widget/widget_observer.h" | |
| 14 | |
| 15 namespace aura { | |
| 16 class Window; | |
| 17 } | |
| 18 | |
| 19 namespace ash { | |
| 20 class RootWindowController; | |
| 21 | |
| 22 // This class implements a widget-based wallpaper. | |
| 23 // DesktopBackgroundWidgetController is owned by RootWindowController. | |
| 24 // When the animation completes the old DesktopBackgroundWidgetController is | |
| 25 // destroyed. Exported for tests. | |
| 26 class ASH_EXPORT DesktopBackgroundWidgetController | |
| 27 : public views::WidgetObserver, | |
| 28 public WmWindowObserver { | |
| 29 public: | |
| 30 // Create | |
| 31 explicit DesktopBackgroundWidgetController(views::Widget* widget); | |
| 32 | |
| 33 ~DesktopBackgroundWidgetController() override; | |
| 34 | |
| 35 // Overridden from views::WidgetObserver. | |
| 36 void OnWidgetDestroying(views::Widget* widget) override; | |
| 37 | |
| 38 // Set bounds of component that draws background. | |
| 39 void SetBounds(const gfx::Rect& bounds); | |
| 40 | |
| 41 // Move component from |src_container| in |root_window| to |dest_container|. | |
| 42 // It is required for lock screen, when we need to move background so that | |
| 43 // it hides user's windows. Returns true if there was something to reparent. | |
| 44 bool Reparent(aura::Window* root_window, | |
| 45 int src_container, | |
| 46 int dest_container); | |
| 47 | |
| 48 // Starts wallpaper fade in animation. |root_window_controller| is | |
| 49 // the root window where the animation will happen. (This is | |
| 50 // necessary this as |layer_| doesn't have access to the root window). | |
| 51 void StartAnimating(RootWindowController* root_window_controller); | |
| 52 | |
| 53 views::Widget* widget() { return widget_; } | |
| 54 | |
| 55 private: | |
| 56 void RemoveObservers(); | |
| 57 | |
| 58 // WmWindowObserver: | |
| 59 void OnWindowBoundsChanged(WmWindow* window, | |
| 60 const gfx::Rect& old_bounds, | |
| 61 const gfx::Rect& new_bounds) override; | |
| 62 | |
| 63 views::Widget* widget_; | |
| 64 | |
| 65 // Parent of |widget_|. | |
| 66 WmWindow* widget_parent_; | |
| 67 | |
| 68 DISALLOW_COPY_AND_ASSIGN(DesktopBackgroundWidgetController); | |
| 69 }; | |
| 70 | |
| 71 // This class wraps a DesktopBackgroundWidgetController pointer. It is owned | |
| 72 // by RootWindowController. The instance of DesktopBackgroundWidgetController is | |
| 73 // moved to this RootWindowController when the animation completes. | |
| 74 // Exported for tests. | |
| 75 class ASH_EXPORT AnimatingDesktopController { | |
| 76 public: | |
| 77 explicit AnimatingDesktopController( | |
| 78 DesktopBackgroundWidgetController* component); | |
| 79 ~AnimatingDesktopController(); | |
| 80 | |
| 81 // Stops animation and makes sure OnImplicitAnimationsCompleted() is called if | |
| 82 // current animation is not finished yet. | |
| 83 // Note we have to make sure this function is called before we set | |
| 84 // kAnimatingDesktopController to a new controller. If it is not called, the | |
| 85 // animating widget/layer is closed immediately and the new one is animating | |
| 86 // from the widget/layer before animation. For instance, if a user quickly | |
| 87 // switches between red, green and blue wallpapers. The green wallpaper will | |
| 88 // first fade in from red wallpaper. And in the middle of the animation, blue | |
| 89 // wallpaper also wants to fade in. If the green wallpaper animation does not | |
| 90 // finish immediately, the green wallpaper widget will be removed and the red | |
| 91 // widget will show again. As a result, the blue wallpaper fades in from red | |
| 92 // wallpaper. This is a bad user experience. See bug http://crbug.com/156542 | |
| 93 // for more details. | |
| 94 void StopAnimating(); | |
| 95 | |
| 96 // Gets the wrapped DesktopBackgroundWidgetController pointer. Caller should | |
| 97 // take ownership of the pointer if |pass_ownership| is true. | |
| 98 DesktopBackgroundWidgetController* GetController(bool pass_ownership); | |
| 99 | |
| 100 private: | |
| 101 std::unique_ptr<DesktopBackgroundWidgetController> controller_; | |
| 102 | |
| 103 DISALLOW_COPY_AND_ASSIGN(AnimatingDesktopController); | |
| 104 }; | |
| 105 | |
| 106 } // namespace ash | |
| 107 | |
| 108 #endif // ASH_DESKTOP_BACKGROUND_DESKTOP_BACKGROUND_WIDGET_CONTROLLER_H_ | |
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Chromium Code Reviews
Issue 2290473004:
Rename ash desktop_background to wallpaper. (Closed)
