src/ui/app_list/views/top_icon_animation_view.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 "ui/app_list/views/top_icon_animation_view.h"
   6
   7 #include "ui/app_list/app_list_constants.h"
   8 #include "ui/compositor/scoped_layer_animation_settings.h"
   9 #include "ui/gfx/image/image_skia_operations.h"
  10 #include "ui/views/controls/image_view.h"
  11
  12 namespace app_list {
  13
  14 TopIconAnimationView::TopIconAnimationView(const gfx::ImageSkia& icon,
  15                                            const gfx::Rect& scaled_rect,
  16                                            bool open_folder)
  17     : icon_size_(kPreferredIconDimension, kPreferredIconDimension),
  18       icon_(new views::ImageView),
  19       scaled_rect_(scaled_rect),
  20       open_folder_(open_folder) {
  21   DCHECK(!icon.isNull());
  22   gfx::ImageSkia resized(gfx::ImageSkiaOperations::CreateResizedImage(
  23       icon,
  24       skia::ImageOperations::RESIZE_BEST, icon_size_));
  25   icon_->SetImage(resized);
  26   AddChildView(icon_);
  27
  28   SetPaintToLayer(true);
  29   SetFillsBoundsOpaquely(false);
  30  }
  31
  32 TopIconAnimationView::~TopIconAnimationView() {
  33 }
  34
  35 void TopIconAnimationView::AddObserver(TopIconAnimationObserver* observer) {
  36   observers_.AddObserver(observer);
  37 }
  38
  39 void TopIconAnimationView::RemoveObserver(TopIconAnimationObserver* observer) {
  40   observers_.RemoveObserver(observer);
  41 }
  42
  43 void TopIconAnimationView::TransformView() {
  44   // Transform used for scaling down the icon and move it back inside to the
  45   // original folder icon.
  46   const float kIconTransformScale = 0.33333f;
  47   gfx::Transform transform;
  48   transform.Translate(scaled_rect_.x() - layer()->bounds().x(),
  49                       scaled_rect_.y() - layer()->bounds().y());
  50   transform.Scale(kIconTransformScale, kIconTransformScale);
  51
  52   if (open_folder_) {
  53     // Transform to a scaled down icon inside the original folder icon.
  54     layer()->SetTransform(transform);
  55   }
  56
  57   // Animate the icon to its target location and scale when opening or
  58   // closing a folder.
  59   ui::ScopedLayerAnimationSettings settings(layer()->GetAnimator());
  60   settings.AddObserver(this);
  61   settings.SetTweenType(gfx::Tween::EASE_IN_OUT_2);
  62   settings.SetTransitionDuration(
  63       base::TimeDelta::FromMilliseconds(kFolderTransitionInDurationMs));
  64   layer()->SetTransform(open_folder_ ? gfx::Transform() : transform);
  65 }
  66
  67 gfx::Size TopIconAnimationView::GetPreferredSize() {
  68   return icon_size_;
  69 }
  70
  71 void TopIconAnimationView::Layout() {
  72   icon_->SetBoundsRect(GetContentsBounds());
  73 }
  74
  75 void TopIconAnimationView::OnImplicitAnimationsCompleted() {
  76   SetVisible(false);
  77   FOR_EACH_OBSERVER(TopIconAnimationObserver,
  78                     observers_,
  79                     OnTopIconAnimationsComplete());
  80   delete this;
  81 }
  82
  83 }  // namespace app_list