ash/wm/overview/scoped_overview_animation_settings.cc

   1 // Copyright 2014 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/overview/scoped_overview_animation_settings.h"
   6
   7 #include "ash/wm/overview/overview_animation_type.h"
   8 #include "base/time/time.h"
   9 #include "ui/aura/window.h"
  10 #include "ui/compositor/layer.h"
  11 #include "ui/gfx/animation/tween.h"
  12
  13 namespace ash {
  14
  15 namespace {
  16
  17 // The time duration for transformation animations.
  18 const int kTransitionMilliseconds = 200;
  19
  20 // The time duration for widgets to fade in.
  21 const int kFadeInMilliseconds = 80;
  22
  23 base::TimeDelta GetAnimationDuration(OverviewAnimationType animation_type) {
  24   switch (animation_type) {
  25     case OVERVIEW_ANIMATION_NONE:
  26       return base::TimeDelta();
  27     case OVERVIEW_ANIMATION_ENTER_OVERVIEW_MODE_FADE_IN:
  28       return base::TimeDelta::FromMilliseconds(kFadeInMilliseconds);
  29     case OVERVIEW_ANIMATION_LAY_OUT_SELECTOR_ITEMS:
  30     case OVERVIEW_ANIMATION_RESTORE_WINDOW:
  31     case OVERVIEW_ANIMATION_HIDE_WINDOW:
  32       return base::TimeDelta::FromMilliseconds(kTransitionMilliseconds);
  33   }
  34   NOTREACHED();
  35   return base::TimeDelta();
  36 }
  37
  38 }  // namespace
  39
  40 ScopedOverviewAnimationSettings::ScopedOverviewAnimationSettings(
  41     OverviewAnimationType animation_type,
  42     aura::Window* window)
  43     : animation_settings_(window->layer()->GetAnimator()) {
  44
  45   switch (animation_type) {
  46     case OVERVIEW_ANIMATION_NONE:
  47       animation_settings_.SetPreemptionStrategy(
  48           ui::LayerAnimator::REPLACE_QUEUED_ANIMATIONS);
  49       break;
  50     case OVERVIEW_ANIMATION_ENTER_OVERVIEW_MODE_FADE_IN:
  51       window->layer()->GetAnimator()->SchedulePauseForProperties(
  52           GetAnimationDuration(
  53               OverviewAnimationType::OVERVIEW_ANIMATION_LAY_OUT_SELECTOR_ITEMS),
  54           ui::LayerAnimationElement::OPACITY);
  55       animation_settings_.SetPreemptionStrategy(
  56           ui::LayerAnimator::REPLACE_QUEUED_ANIMATIONS);
  57       break;
  58     case OVERVIEW_ANIMATION_LAY_OUT_SELECTOR_ITEMS:
  59     case OVERVIEW_ANIMATION_RESTORE_WINDOW:
  60       animation_settings_.SetPreemptionStrategy(
  61           ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
  62       animation_settings_.SetTweenType(gfx::Tween::FAST_OUT_SLOW_IN);
  63       break;
  64     case OVERVIEW_ANIMATION_HIDE_WINDOW:
  65       animation_settings_.SetPreemptionStrategy(
  66           ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
  67       break;
  68   }
  69   animation_settings_.SetTransitionDuration(
  70       GetAnimationDuration(animation_type));
  71 }
  72
  73 ScopedOverviewAnimationSettings::~ScopedOverviewAnimationSettings() {
  74 }
  75
  76 }  // namespace ash