ash/wm/workspace/desktop_background_fade_controller.cc

   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 #include "ash/wm/workspace/desktop_background_fade_controller.h"
   6
   7 #include "ash/wm/window_animations.h"
   8 #include "ash/wm/workspace/colored_window_controller.h"
   9 #include "base/time.h"
  10 #include "ui/aura/window.h"
  11 #include "ui/compositor/scoped_layer_animation_settings.h"
  12 #include "ui/views/widget/widget.h"
  13
  14 namespace ash {
  15 namespace internal {
  16
  17 DesktopBackgroundFadeController::DesktopBackgroundFadeController(
  18     aura::Window* parent,
  19     aura::Window* position_above,
  20     base::TimeDelta duration,
  21     Direction direction) {
  22   SkColor start_color, target_color;
  23   ui::Tween::Type tween_type;
  24   if (direction == FADE_OUT) {
  25     start_color = SkColorSetARGB(0, 0, 0, 0);
  26     target_color = SK_ColorBLACK;
  27     tween_type = ui::Tween::EASE_IN_OUT;
  28   } else {
  29     start_color = SK_ColorBLACK;
  30     target_color = SkColorSetARGB(0, 0, 0, 0);
  31     tween_type = ui::Tween::EASE_IN_OUT;
  32   }
  33
  34   window_controller_.reset(
  35       new ColoredWindowController(parent, "DesktopFade"));
  36
  37   // Force the window to be directly on top of the desktop.
  38   aura::Window* fade_window = window_controller_->GetWidget()->GetNativeView();
  39   parent->StackChildBelow(fade_window, position_above);
  40   parent->StackChildAbove(fade_window, position_above);
  41   window_controller_->SetColor(start_color);
  42   views::corewm::SetWindowVisibilityAnimationTransition(
  43       window_controller_->GetWidget()->GetNativeView(),
  44       views::corewm::ANIMATE_NONE);
  45   window_controller_->GetWidget()->Show();
  46   {
  47     ui::ScopedLayerAnimationSettings scoped_setter(
  48         fade_window->layer()->GetAnimator());
  49     scoped_setter.AddObserver(this);
  50     scoped_setter.SetTweenType(tween_type);
  51     scoped_setter.SetTransitionDuration(duration);
  52     window_controller_->SetColor(target_color);
  53   }
  54 }
  55
  56 DesktopBackgroundFadeController::~DesktopBackgroundFadeController() {
  57   StopObservingImplicitAnimations();
  58 }
  59
  60 void DesktopBackgroundFadeController::OnImplicitAnimationsCompleted() {
  61   window_controller_.reset();
  62 }
  63
  64 }  // namespace internal
  65 }  // namespace ash