ui/app_list/views/app_list_item_view.h

   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 #ifndef UI_APP_LIST_VIEWS_APP_LIST_ITEM_VIEW_H_
   6 #define UI_APP_LIST_VIEWS_APP_LIST_ITEM_VIEW_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/timer/timer.h"
  13 #include "ui/app_list/app_list_export.h"
  14 #include "ui/app_list/app_list_item_model_observer.h"
  15 #include "ui/app_list/views/cached_label.h"
  16 #include "ui/gfx/shadow_value.h"
  17 #include "ui/views/context_menu_controller.h"
  18 #include "ui/views/controls/button/custom_button.h"
  19
  20 class SkBitmap;
  21
  22 namespace views {
  23 class ImageView;
  24 class Label;
  25 class MenuRunner;
  26 }
  27
  28 namespace app_list {
  29
  30 class AppListItemModel;
  31 class AppsGridView;
  32 class ProgressBarView;
  33
  34 class APP_LIST_EXPORT AppListItemView : public views::CustomButton,
  35                                         public views::ContextMenuController,
  36                                         public AppListItemModelObserver {
  37  public:
  38   // Internal class name.
  39   static const char kViewClassName[];
  40
  41   AppListItemView(AppsGridView* apps_grid_view, AppListItemModel* model);
  42   virtual ~AppListItemView();
  43
  44   void SetIconSize(const gfx::Size& size);
  45
  46   void Prerender();
  47
  48   void CancelContextMenu();
  49
  50   AppListItemModel* model() const { return model_; }
  51
  52   const views::Label* title() const { return title_; }
  53
  54   gfx::ImageSkia GetDragImage();
  55
  56  private:
  57   enum UIState {
  58     UI_STATE_NORMAL,    // Normal UI (icon + label)
  59     UI_STATE_DRAGGING,  // Dragging UI (scaled icon only)
  60   };
  61
  62   // Get icon from model and schedule background processing.
  63   void UpdateIcon();
  64
  65   // Update the tooltip text from the model.
  66   void UpdateTooltip();
  67
  68   void SetUIState(UIState state);
  69
  70   // Sets |touch_dragging_| flag and updates UI.
  71   void SetTouchDragging(bool touch_dragging);
  72
  73   // Invoked when |mouse_drag_timer_| fires to show dragging UI.
  74   void OnMouseDragTimer();
  75
  76   // AppListItemModelObserver overrides:
  77   virtual void ItemIconChanged() OVERRIDE;
  78   virtual void ItemTitleChanged() OVERRIDE;
  79   virtual void ItemHighlightedChanged() OVERRIDE;
  80   virtual void ItemIsInstallingChanged() OVERRIDE;
  81   virtual void ItemPercentDownloadedChanged() OVERRIDE;
  82
  83   // views::View overrides:
  84   virtual const char* GetClassName() const OVERRIDE;
  85   virtual void Layout() OVERRIDE;
  86   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
  87   virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
  88
  89   // views::ContextMenuController overrides:
  90   virtual void ShowContextMenuForView(views::View* source,
  91                                       const gfx::Point& point,
  92                                       ui::MenuSourceType source_type) OVERRIDE;
  93
  94   // views::CustomButton overrides:
  95   virtual void StateChanged() OVERRIDE;
  96   virtual bool ShouldEnterPushedState(const ui::Event& event) OVERRIDE;
  97
  98   // views::View overrides:
  99   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
 100   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
 101   virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
 102   virtual void OnMouseCaptureLost() OVERRIDE;
 103   virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
 104
 105   // ui::EventHandler overrides:
 106   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 107
 108   AppListItemModel* model_;  // Owned by AppListModel.
 109
 110   AppsGridView* apps_grid_view_;  // Owned by views hierarchy.
 111   views::ImageView* icon_;  // Owned by views hierarchy.
 112   CachedLabel* title_;  // Owned by views hierarchy.
 113   ProgressBarView* progress_bar_;  // Owned by views hierarchy.
 114
 115   scoped_ptr<views::MenuRunner> context_menu_runner_;
 116
 117   gfx::Size icon_size_;
 118   gfx::ShadowValues icon_shadows_;
 119
 120   UIState ui_state_;
 121
 122   // True if scroll gestures should contribute to dragging.
 123   bool touch_dragging_;
 124
 125   // A timer to defer showing drag UI when mouse is pressed.
 126   base::OneShotTimer<AppListItemView> mouse_drag_timer_;
 127
 128   DISALLOW_COPY_AND_ASSIGN(AppListItemView);
 129 };
 130
 131 }  // namespace app_list
 132
 133 #endif  // UI_APP_LIST_VIEWS_APP_LIST_ITEM_VIEW_H_