ui/views/animation/bounds_animator.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 "ui/views/animation/bounds_animator.h"
   6
   7 #include "base/memory/scoped_ptr.h"
   8 #include "ui/gfx/animation/animation_container.h"
   9 #include "ui/gfx/animation/slide_animation.h"
  10 #include "ui/views/animation/bounds_animator_observer.h"
  11 #include "ui/views/view.h"
  12
  13 // Duration in milliseconds for animations.
  14 static const int kDefaultAnimationDuration = 200;
  15
  16 using gfx::Animation;
  17 using gfx::AnimationContainer;
  18 using gfx::SlideAnimation;
  19 using gfx::Tween;
  20
  21 namespace views {
  22
  23 BoundsAnimator::BoundsAnimator(View* parent)
  24     : parent_(parent),
  25       container_(new AnimationContainer()),
  26       animation_duration_ms_(kDefaultAnimationDuration),
  27       tween_type_(Tween::EASE_OUT) {
  28   container_->set_observer(this);
  29 }
  30
  31 BoundsAnimator::~BoundsAnimator() {
  32   // Reset the delegate so that we don't attempt to notify our observer from
  33   // the destructor.
  34   container_->set_observer(NULL);
  35
  36   // Delete all the animations, but don't remove any child views. We assume the
  37   // view owns us and is going to be deleted anyway.
  38   for (ViewToDataMap::iterator i = data_.begin(); i != data_.end(); ++i)
  39     CleanupData(false, &(i->second), i->first);
  40 }
  41
  42 void BoundsAnimator::AnimateViewTo(View* view, const gfx::Rect& target) {
  43   DCHECK(view);
  44   DCHECK_EQ(view->parent(), parent_);
  45
  46   Data existing_data;
  47
  48   if (IsAnimating(view)) {
  49     // Don't immediatly delete the animation, that might trigger a callback from
  50     // the animationcontainer.
  51     existing_data = data_[view];
  52
  53     RemoveFromMaps(view);
  54   }
  55
  56   // NOTE: we don't check if the view is already at the target location. Doing
  57   // so leads to odd cases where no animations may be present after invoking
  58   // AnimateViewTo. AnimationProgressed does nothing when the bounds of the
  59   // view don't change.
  60
  61   Data& data = data_[view];
  62   data.start_bounds = view->bounds();
  63   data.target_bounds = target;
  64   data.animation = CreateAnimation();
  65
  66   animation_to_view_[data.animation] = view;
  67
  68   data.animation->Show();
  69
  70   CleanupData(true, &existing_data, NULL);
  71 }
  72
  73 void BoundsAnimator::SetTargetBounds(View* view, const gfx::Rect& target) {
  74   if (!IsAnimating(view)) {
  75     AnimateViewTo(view, target);
  76     return;
  77   }
  78
  79   data_[view].target_bounds = target;
  80 }
  81
  82 gfx::Rect BoundsAnimator::GetTargetBounds(View* view) {
  83   if (!IsAnimating(view))
  84     return view->bounds();
  85   return data_[view].target_bounds;
  86 }
  87
  88 void BoundsAnimator::SetAnimationForView(View* view,
  89                                          SlideAnimation* animation) {
  90   DCHECK(animation);
  91
  92   scoped_ptr<SlideAnimation> animation_wrapper(animation);
  93
  94   if (!IsAnimating(view))
  95     return;
  96
  97   // We delay deleting the animation until the end so that we don't prematurely
  98   // send out notification that we're done.
  99   scoped_ptr<Animation> old_animation(ResetAnimationForView(view));
 100
 101   data_[view].animation = animation_wrapper.release();
 102   animation_to_view_[animation] = view;
 103
 104   animation->set_delegate(this);
 105   animation->SetContainer(container_.get());
 106   animation->Show();
 107 }
 108
 109 const SlideAnimation* BoundsAnimator::GetAnimationForView(View* view) {
 110   return !IsAnimating(view) ? NULL : data_[view].animation;
 111 }
 112
 113 void BoundsAnimator::SetAnimationDelegate(
 114     View* view,
 115     scoped_ptr<AnimationDelegate> delegate) {
 116   DCHECK(IsAnimating(view));
 117
 118   data_[view].delegate = delegate.release();
 119 }
 120
 121 void BoundsAnimator::StopAnimatingView(View* view) {
 122   if (!IsAnimating(view))
 123     return;
 124
 125   data_[view].animation->Stop();
 126 }
 127
 128 bool BoundsAnimator::IsAnimating(View* view) const {
 129   return data_.find(view) != data_.end();
 130 }
 131
 132 bool BoundsAnimator::IsAnimating() const {
 133   return !data_.empty();
 134 }
 135
 136 void BoundsAnimator::Cancel() {
 137   if (data_.empty())
 138     return;
 139
 140   while (!data_.empty())
 141     data_.begin()->second.animation->Stop();
 142
 143   // Invoke AnimationContainerProgressed to force a repaint and notify delegate.
 144   AnimationContainerProgressed(container_.get());
 145 }
 146
 147 void BoundsAnimator::SetAnimationDuration(int duration_ms) {
 148   animation_duration_ms_ = duration_ms;
 149 }
 150
 151 void BoundsAnimator::AddObserver(BoundsAnimatorObserver* observer) {
 152   observers_.AddObserver(observer);
 153 }
 154
 155 void BoundsAnimator::RemoveObserver(BoundsAnimatorObserver* observer) {
 156   observers_.RemoveObserver(observer);
 157 }
 158
 159 SlideAnimation* BoundsAnimator::CreateAnimation() {
 160   SlideAnimation* animation = new SlideAnimation(this);
 161   animation->SetContainer(container_.get());
 162   animation->SetSlideDuration(animation_duration_ms_);
 163   animation->SetTweenType(tween_type_);
 164   return animation;
 165 }
 166
 167 void BoundsAnimator::RemoveFromMaps(View* view) {
 168   DCHECK(data_.count(view) > 0);
 169   DCHECK(animation_to_view_.count(data_[view].animation) > 0);
 170
 171   animation_to_view_.erase(data_[view].animation);
 172   data_.erase(view);
 173 }
 174
 175 void BoundsAnimator::CleanupData(bool send_cancel, Data* data, View* view) {
 176   if (send_cancel && data->delegate)
 177     data->delegate->AnimationCanceled(data->animation);
 178
 179   delete data->delegate;
 180   data->delegate = NULL;
 181
 182   if (data->animation) {
 183     data->animation->set_delegate(NULL);
 184     delete data->animation;
 185     data->animation = NULL;
 186   }
 187 }
 188
 189 Animation* BoundsAnimator::ResetAnimationForView(View* view) {
 190   if (!IsAnimating(view))
 191     return NULL;
 192
 193   Animation* old_animation = data_[view].animation;
 194   animation_to_view_.erase(old_animation);
 195   data_[view].animation = NULL;
 196   // Reset the delegate so that we don't attempt any processing when the
 197   // animation calls us back.
 198   old_animation->set_delegate(NULL);
 199   return old_animation;
 200 }
 201
 202 void BoundsAnimator::AnimationEndedOrCanceled(const Animation* animation,
 203                                               AnimationEndType type) {
 204   DCHECK(animation_to_view_.find(animation) != animation_to_view_.end());
 205
 206   View* view = animation_to_view_[animation];
 207   DCHECK(view);
 208
 209   // Make a copy of the data as Remove empties out the maps.
 210   Data data = data_[view];
 211
 212   RemoveFromMaps(view);
 213
 214   if (data.delegate) {
 215     if (type == ANIMATION_ENDED) {
 216       data.delegate->AnimationEnded(animation);
 217     } else {
 218       DCHECK_EQ(ANIMATION_CANCELED, type);
 219       data.delegate->AnimationCanceled(animation);
 220     }
 221   }
 222
 223   CleanupData(false, &data, view);
 224 }
 225
 226 void BoundsAnimator::AnimationProgressed(const Animation* animation) {
 227   DCHECK(animation_to_view_.find(animation) != animation_to_view_.end());
 228
 229   View* view = animation_to_view_[animation];
 230   DCHECK(view);
 231   const Data& data = data_[view];
 232   gfx::Rect new_bounds =
 233       animation->CurrentValueBetween(data.start_bounds, data.target_bounds);
 234   if (new_bounds != view->bounds()) {
 235     gfx::Rect total_bounds = gfx::UnionRects(new_bounds, view->bounds());
 236
 237     // Build up the region to repaint in repaint_bounds_. We'll do the repaint
 238     // when all animations complete (in AnimationContainerProgressed).
 239     repaint_bounds_.Union(total_bounds);
 240
 241     view->SetBoundsRect(new_bounds);
 242   }
 243
 244   if (data.delegate)
 245     data.delegate->AnimationProgressed(animation);
 246 }
 247
 248 void BoundsAnimator::AnimationEnded(const Animation* animation) {
 249   AnimationEndedOrCanceled(animation, ANIMATION_ENDED);
 250 }
 251
 252 void BoundsAnimator::AnimationCanceled(const Animation* animation) {
 253   AnimationEndedOrCanceled(animation, ANIMATION_CANCELED);
 254 }
 255
 256 void BoundsAnimator::AnimationContainerProgressed(
 257     AnimationContainer* container) {
 258   if (!repaint_bounds_.IsEmpty()) {
 259     // Adjust for rtl.
 260     repaint_bounds_.set_x(parent_->GetMirroredXWithWidthInView(
 261         repaint_bounds_.x(), repaint_bounds_.width()));
 262     parent_->SchedulePaintInRect(repaint_bounds_);
 263     repaint_bounds_.SetRect(0, 0, 0, 0);
 264   }
 265
 266   FOR_EACH_OBSERVER(BoundsAnimatorObserver,
 267                     observers_,
 268                     OnBoundsAnimatorProgressed(this));
 269
 270   if (!IsAnimating()) {
 271     // Notify here rather than from AnimationXXX to avoid deleting the animation
 272     // while the animation is calling us.
 273     FOR_EACH_OBSERVER(BoundsAnimatorObserver,
 274                       observers_,
 275                       OnBoundsAnimatorDone(this));
 276   }
 277 }
 278
 279 void BoundsAnimator::AnimationContainerEmpty(AnimationContainer* container) {
 280 }
 281
 282 }  // namespace views