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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.
#include <memory>
#include "ash/ash_export.h"
#include "base/macros.h"
#include "ui/aura/window_observer.h"
#include "ui/views/widget/widget_observer.h"
namespace ash {
class RootWindowController;
// This class implements a widget-based wallpaper.
// WallpaperWidgetController is owned by RootWindowController.
// When the animation completes the old WallpaperWidgetController is
// destroyed. Exported for tests.
class ASH_EXPORT WallpaperWidgetController : public views::WidgetObserver,
public aura::WindowObserver {
explicit WallpaperWidgetController(views::Widget* widget);
~WallpaperWidgetController() override;
// Overridden from views::WidgetObserver.
void OnWidgetDestroying(views::Widget* widget) override;
// Set bounds for the widget that draws the wallpaper.
void SetBounds(const gfx::Rect& bounds);
// Move the wallpaper for |root_window| to the specified |container|.
// The lock screen moves the wallpaper container to hides the user's windows.
// Returns true if there was something to reparent.
bool Reparent(aura::Window* root_window, int container);
// Starts wallpaper fade in animation. |root_window_controller| is
// the root window where the animation will happen. (This is
// necessary this as |layer_| doesn't have access to the root window).
void StartAnimating(RootWindowController* root_window_controller);
// Blur pixels of the wallpaper layer by 3 * the given amount.
void SetWallpaperBlur(float blur_sigma);
views::Widget* widget() { return widget_; }
void RemoveObservers();
// aura::WindowObserver:
void OnWindowBoundsChanged(aura::Window* window,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds,
ui::PropertyChangeReason reason) override;
views::Widget* widget_;
// Parent of |widget_|.
aura::Window* widget_parent_;
// True when we request cache on blurring layer.
bool has_blur_cache_;
// This class wraps a WallpaperWidgetController pointer. It is owned
// by RootWindowController. The instance of WallpaperWidgetController is
// moved to this RootWindowController when the animation completes.
// Exported for tests.
class ASH_EXPORT AnimatingWallpaperWidgetController {
explicit AnimatingWallpaperWidgetController(
WallpaperWidgetController* component);
// Stops animation and makes sure OnImplicitAnimationsCompleted() is called if
// current animation is not finished yet.
// Note we have to make sure this function is called before we set
// AnimatingWallpaperWidgetController to a new controller. If it is not
// called, the animating widget/layer is closed immediately and the new one is
// animating from the widget/layer before animation. For instance, if a user
// quickly switches between red, green and blue wallpapers. The green
// wallpaper will first fade in from red wallpaper. And in the middle of the
// animation, blue wallpaper also wants to fade in. If the green wallpaper
// animation does not finish immediately, the green wallpaper widget will be
// removed and the red widget will show again. As a result, the blue wallpaper
// fades in from red wallpaper. This is a bad user experience. See bug
// for more details.
void StopAnimating();
// Gets the wrapped WallpaperWidgetController pointer. Caller should
// take ownership of the pointer if |pass_ownership| is true.
WallpaperWidgetController* GetController(bool pass_ownership);
std::unique_ptr<WallpaperWidgetController> controller_;
} // namespace ash