ash/wm/app_list_controller.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 ASH_WM_APP_LIST_CONTROLLER_H_
   6 #define ASH_WM_APP_LIST_CONTROLLER_H_
   7
   8 #include "ash/launcher/launcher_icon_observer.h"
   9 #include "ash/shell_observer.h"
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/timer/timer.h"
  13 #include "ui/app_list/pagination_model_observer.h"
  14 #include "ui/aura/client/focus_change_observer.h"
  15 #include "ui/aura/window_observer.h"
  16 #include "ui/base/events/event_handler.h"
  17 #include "ui/compositor/layer_animation_observer.h"
  18 #include "ui/gfx/rect.h"
  19 #include "ui/views/widget/widget_observer.h"
  20
  21 namespace app_list {
  22 class ApplicationDragAndDropHost;
  23 class AppListView;
  24 class PaginationModel;
  25 }
  26
  27 namespace ui {
  28 class LocatedEvent;
  29 }
  30
  31 namespace ash {
  32 namespace internal {
  33
  34 // AppListController is a controller that manages app list UI for shell.
  35 // It creates AppListView and schedules showing/hiding animation.
  36 // While the UI is visible, it monitors things such as app list widget's
  37 // activation state and desktop mouse click to auto dismiss the UI.
  38 class AppListController : public ui::EventHandler,
  39                           public aura::client::FocusChangeObserver,
  40                           public aura::WindowObserver,
  41                           public ui::ImplicitAnimationObserver,
  42                           public views::WidgetObserver,
  43                           public ShellObserver,
  44                           public LauncherIconObserver,
  45                           public app_list::PaginationModelObserver {
  46  public:
  47   AppListController();
  48   virtual ~AppListController();
  49
  50   // Show/hide app list window. The |window| is used to deterime in
  51   // which display (in which the |window| exists) the app list should
  52   // be shown.
  53   void SetVisible(bool visible, aura::Window* window);
  54
  55   // Whether app list window is visible (shown or being shown).
  56   bool IsVisible() const;
  57
  58   // Returns target visibility. This differs from IsVisible() if an animation
  59   // is ongoing.
  60   bool GetTargetVisibility() const { return is_visible_; }
  61
  62   // Returns app list window or NULL if it is not visible.
  63   aura::Window* GetWindow();
  64
  65  private:
  66   // If |drag_and_drop_host| is not NULL it will be called upon drag and drop
  67   // operations outside the application list.
  68   void SetDragAndDropHostOfCurrentAppList(
  69       app_list::ApplicationDragAndDropHost* drag_and_drop_host);
  70
  71   // Sets the app list view and attempts to show it.
  72   void SetView(app_list::AppListView* view);
  73
  74   // Forgets the view.
  75   void ResetView();
  76
  77   // Starts show/hide animation.
  78   void ScheduleAnimation();
  79
  80   void ProcessLocatedEvent(ui::LocatedEvent* event);
  81
  82   // Makes app list bubble update its bounds.
  83   void UpdateBounds();
  84
  85   // ui::EventHandler overrides:
  86   virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
  87   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
  88
  89   // aura::client::FocusChangeObserver overrides:
  90   virtual void OnWindowFocused(aura::Window* gained_focus,
  91                                aura::Window* lost_focus) OVERRIDE;
  92
  93   // aura::WindowObserver overrides:
  94   virtual void OnWindowBoundsChanged(aura::Window* root,
  95                                      const gfx::Rect& old_bounds,
  96                                      const gfx::Rect& new_bounds) OVERRIDE;
  97
  98   // ui::ImplicitAnimationObserver overrides:
  99   virtual void OnImplicitAnimationsCompleted() OVERRIDE;
 100
 101   // views::WidgetObserver overrides:
 102   virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE;
 103
 104   // ShellObserver overrides:
 105   virtual void OnShelfAlignmentChanged(aura::RootWindow* root_window) OVERRIDE;
 106
 107   // LauncherIconObserver overrides:
 108   virtual void OnLauncherIconPositionsChanged() OVERRIDE;
 109
 110   // app_list::PaginationModelObserver overrides:
 111   virtual void TotalPagesChanged() OVERRIDE;
 112   virtual void SelectedPageChanged(int old_selected, int new_selected) OVERRIDE;
 113   virtual void TransitionStarted() OVERRIDE;
 114   virtual void TransitionChanged() OVERRIDE;
 115
 116   scoped_ptr<app_list::PaginationModel> pagination_model_;
 117
 118   // Whether we should show or hide app list widget.
 119   bool is_visible_;
 120
 121   // The AppListView this class manages, owned by its widget.
 122   app_list::AppListView* view_;
 123
 124   // Cached bounds of |view_| for snapping back animation after over-scroll.
 125   gfx::Rect view_bounds_;
 126
 127   // Whether should schedule snap back animation.
 128   bool should_snap_back_;
 129
 130   DISALLOW_COPY_AND_ASSIGN(AppListController);
 131 };
 132
 133 }  // namespace internal
 134 }  // namespace ash
 135
 136 #endif  // ASH_WM_APP_LIST_CONTROLLER_H_