Skeleton for app_list on OSX, and refactoring for enable_app_list=1 on OS=="mac".

ui/app_list/app_list_item_view.h

-// 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.
-
-#ifndef UI_APP_LIST_APP_LIST_ITEM_VIEW_H_
-#define UI_APP_LIST_APP_LIST_ITEM_VIEW_H_
-
-#include <string>
-
-#include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/timer.h"
-#include "ui/app_list/app_list_export.h"
-#include "ui/app_list/app_list_item_model_observer.h"
-#include "ui/gfx/shadow_value.h"
-#include "ui/views/context_menu_controller.h"
-#include "ui/views/controls/button/custom_button.h"
-
-class SkBitmap;
-
-namespace views {
-class ImageView;
-class Label;
-class MenuRunner;
-}
-
-namespace app_list {
-
-class AppListItemModel;
-class AppsGridView;
-
-class APP_LIST_EXPORT AppListItemView : public views::CustomButton,
-                                        public views::ContextMenuController,
-                                        public AppListItemModelObserver {
- public:
-  // Internal class name.
-  static const char kViewClassName[];
-
-  AppListItemView(AppsGridView* apps_grid_view, AppListItemModel* model);
-  virtual ~AppListItemView();
-
-  void SetIconSize(const gfx::Size& size);
-
-  AppListItemModel* model() const { return model_; }
-
- private:
-  enum UIState {
-    UI_STATE_NORMAL,    // Normal UI (icon + label)
-    UI_STATE_DRAGGING,  // Dragging UI (scaled icon only)
-  };
-
-  // Get icon from model and schedule background processing.
-  void UpdateIcon();
-
-  void SetUIState(UIState state);
-
-  // Sets |touch_dragging_| flag and updates UI.
-  void SetTouchDragging(bool touch_dragging);
-
-  // Invoked when |mouse_drag_timer_| fires to show dragging UI.
-  void OnMouseDragTimer();
-
-  // AppListItemModelObserver overrides:
-  virtual void ItemIconChanged() OVERRIDE;
-  virtual void ItemTitleChanged() OVERRIDE;
-  virtual void ItemHighlightedChanged() OVERRIDE;
-
-  // views::View overrides:
-  virtual std::string GetClassName() const OVERRIDE;
-  virtual void Layout() OVERRIDE;
-  virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
-  virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
-
-  // views::ContextMenuController overrides:
-  virtual void ShowContextMenuForView(views::View* source,
-                                      const gfx::Point& point) OVERRIDE;
-
-  // views::CustomButton overrides:
-  virtual void StateChanged() OVERRIDE;
-  virtual bool ShouldEnterPushedState(const ui::Event& event) OVERRIDE;
-
-  // views::View overrides:
-  virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
-  virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
-  virtual void OnMouseCaptureLost() OVERRIDE;
-  virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
-
-  // ui::EventHandler overrides:
-  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
-
-  AppListItemModel* model_;  // Owned by AppListModel::Apps.
-
-  AppsGridView* apps_grid_view_;  // Owned by views hierarchy.
-  views::ImageView* icon_;  // Owned by views hierarchy.
-  views::Label* title_;  // Owned by views hierarchy.
-
-  scoped_ptr<views::MenuRunner> context_menu_runner_;
-
-  gfx::Size icon_size_;
-  gfx::ShadowValues icon_shadows_;
-
-  UIState ui_state_;
-
-  // True if scroll gestures should contribute to dragging.
-  bool touch_dragging_;
-
-  // A timer to defer showing drag UI when mouse is pressed.
-  base::OneShotTimer<AppListItemView> mouse_drag_timer_;
-
-  DISALLOW_COPY_AND_ASSIGN(AppListItemView);
-};
-
-}  // namespace app_list
-
-#endif  // UI_APP_LIST_APP_LIST_ITEM_VIEW_H_