Implement animation UI for opening/closing an app list folder.

ui/app_list/views/app_list_item_view.cc

 // 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 "ui/app_list/views/app_list_item_view.h"
 
 #include <algorithm>
 
 #include "base/strings/utf_string_conversions.h"
 #include "ui/app_list/app_list_constants.h"
@@ skipping 29 matching lines @@
 
 // Radius of the folder dropping preview circle.
 const int kFolderPreviewRadius = 40;
 
 const int kLeftRightPaddingChars = 1;
 
 // Scale to transform the icon when a drag starts.
 const float kDraggingIconScale = 1.5f;
 
 // Delay in milliseconds of when the dragging UI should be shown for mouse drag.
-const int kMouseDragUIDelayInMs = 100;
+const int kMouseDragUIDelayInMs = 200;
 
 }  // namespace
 
 // static
 const char AppListItemView::kViewClassName[] = "ui/app_list/AppListItemView";
 
 AppListItemView::AppListItemView(AppsGridView* apps_grid_view,
                                  AppListItem* item)
     : CustomButton(apps_grid_view),
       item_(item),
@@ skipping 59 matching lines @@
   }
 
   gfx::ImageSkia resized(gfx::ImageSkiaOperations::CreateResizedImage(icon,
       skia::ImageOperations::RESIZE_BEST, icon_size_));
   if (item_->has_shadow()) {
     gfx::ImageSkia shadow(
         gfx::ImageSkiaOperations::CreateImageWithDropShadow(resized,
                                                             icon_shadows_));
     icon_->SetImage(shadow);
     return;
-  };
+  }
 
   icon_->SetImage(resized);
 }
 
 void AppListItemView::UpdateTooltip() {
   title_->SetTooltipText(item_->title() == item_->full_name() ? base::string16()
                          : base::UTF8ToUTF16(item_->full_name()));
 }
 
 void AppListItemView::SetUIState(UIState state) {
@@ skipping 121 matching lines @@
   gfx::Rect rect(GetContentsBounds());
 
   const int left_right_padding =
       title_->font_list().GetExpectedTextWidth(kLeftRightPaddingChars);
   rect.Inset(left_right_padding, kTopPadding, left_right_padding, 0);
   const int y = rect.y();
 
   gfx::Rect icon_bounds(rect.x(), y, rect.width(), icon_size_.height());
   icon_bounds.Inset(gfx::ShadowValue::GetMargin(icon_shadows_));
   icon_->SetBoundsRect(icon_bounds);
-
   const gfx::Size title_size = title_->GetPreferredSize();
   gfx::Rect title_bounds(rect.x() + (rect.width() - title_size.width()) / 2,
                          y + icon_size_.height() + kIconTitleSpacing,
                          title_size.width(),
                          title_size.height());
   title_bounds.Intersect(rect);
   title_->SetBoundsRect(title_bounds);
 
   gfx::Rect progress_bar_bounds(progress_bar_->GetPreferredSize());
   progress_bar_bounds.set_x(GetContentsBounds().x() +
@@ skipping 173 matching lines @@
       break;
   }
   if (!event->handled())
     CustomButton::OnGestureEvent(event);
 }
 
 void AppListItemView::OnSyncDragEnd() {
   SetUIState(UI_STATE_NORMAL);
 }
 
+const gfx::Rect& AppListItemView::GetIconBounds() const {
+  return icon_->bounds();
+}
+
 }  // namespace app_list