Draggable peeking/fullscreen launcher with transparent background.

ui/app_list/views/all_apps_tile_item_view.cc

 // Copyright 2014 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/all_apps_tile_item_view.h"
 
 #include "base/metrics/histogram_macros.h"
 #include "ui/app_list/app_list_constants.h"
+#include "ui/app_list/app_list_features.h"
 #include "ui/app_list/resources/grit/app_list_resources.h"
+#include "ui/app_list/views/app_list_view.h"
 #include "ui/app_list/views/contents_view.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/image/canvas_image_source.h"
 #include "ui/resources/grit/ui_resources.h"
 #include "ui/strings/grit/ui_strings.h"
+#include "ui/views/widget/widget.h"

[xiyuan, 2017/05/30 22:18:50]

nit: unused ?

[newcomer, 2017/06/01 01:42:54]

Done.

 
 namespace app_list {
 
 namespace {
 
 class AllAppsImageSource : public gfx::CanvasImageSource {
  public:
   AllAppsImageSource(const gfx::ImageSkia& icon, const gfx::Size& size)
       : gfx::CanvasImageSource(size, false), icon_(icon) {}
   ~AllAppsImageSource() override {}
 
  private:
   // gfx::CanvasImageSource override:
   void Draw(gfx::Canvas* canvas) override {
     canvas->DrawImageInt(icon_, (size().width() - icon_.size().width()) / 2,
                          (size().height() - icon_.size().height()) / 2);
   }
 
   gfx::ImageSkia icon_;
 
   DISALLOW_COPY_AND_ASSIGN(AllAppsImageSource);
 };
 
 }  // namespace
 
-AllAppsTileItemView::AllAppsTileItemView(ContentsView* contents_view)
-    : contents_view_(contents_view) {
+AllAppsTileItemView::AllAppsTileItemView(ContentsView* contents_view,
+                                         AppListView* app_list_view)
+    : contents_view_(contents_view), app_list_view_(app_list_view) {
   SetTitle(l10n_util::GetStringUTF16(IDS_APP_LIST_ALL_APPS));
   SetHoverStyle(TileItemView::HOVER_STYLE_ANIMATE_SHADOW);
   UpdateIcon();
 }
 
 AllAppsTileItemView::~AllAppsTileItemView() {
 }
 
 void AllAppsTileItemView::UpdateIcon() {
   ResourceBundle& rb = ResourceBundle::GetSharedInstance();
   gfx::Size canvas_size = gfx::Size(kTileIconSize, kTileIconSize);
   AllAppsImageSource* source = new AllAppsImageSource(
       *rb.GetImageNamed(IDR_ALL_APPS_DROP_DOWN).ToImageSkia(), canvas_size);
   gfx::ImageSkia image(source, canvas_size);
 
   SetIcon(image);
 }
 
 void AllAppsTileItemView::ButtonPressed(views::Button* sender,
                                         const ui::Event& event) {
   UMA_HISTOGRAM_ENUMERATION(kPageOpenedHistogram, AppListModel::STATE_APPS,
                             AppListModel::STATE_LAST);
 
   contents_view_->SetActiveState(AppListModel::STATE_APPS);
+  if (features::IsFullscreenAppListEnabled())
+    app_list_view_->ToFullscreen();
 }
 
 }  // namespace app_list