ash/drag_drop/drag_drop_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_DRAG_DROP_DRAG_DROP_CONTROLLER_H_
   6 #define ASH_DRAG_DROP_DRAG_DROP_CONTROLLER_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "base/callback.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "ui/aura/window_observer.h"
  12 #include "ui/base/dragdrop/os_exchange_data.h"
  13 #include "ui/events/event_constants.h"
  14 #include "ui/events/event_handler.h"
  15 #include "ui/gfx/animation/animation_delegate.h"
  16 #include "ui/gfx/geometry/rect.h"
  17 #include "ui/wm/public/drag_drop_client.h"
  18
  19 namespace gfx {
  20 class LinearAnimation;
  21 }
  22
  23 namespace ash {
  24 class DragDropTracker;
  25 class DragDropTrackerDelegate;
  26 class DragImageView;
  27
  28 namespace test {
  29 class DragDropControllerTest;
  30 }
  31
  32 class ASH_EXPORT DragDropController
  33     : public aura::client::DragDropClient,
  34       public ui::EventHandler,
  35       public gfx::AnimationDelegate,
  36       public aura::WindowObserver {
  37  public:
  38   DragDropController();
  39   ~DragDropController() override;
  40
  41   void set_should_block_during_drag_drop(bool should_block_during_drag_drop) {
  42     should_block_during_drag_drop_ = should_block_during_drag_drop;
  43   }
  44
  45   // Overridden from aura::client::DragDropClient:
  46   int StartDragAndDrop(const ui::OSExchangeData& data,
  47                        aura::Window* root_window,
  48                        aura::Window* source_window,
  49                        const gfx::Point& screen_location,
  50                        int operation,
  51                        ui::DragDropTypes::DragEventSource source) override;
  52   void DragUpdate(aura::Window* target, const ui::LocatedEvent& event) override;
  53   void Drop(aura::Window* target, const ui::LocatedEvent& event) override;
  54   void DragCancel() override;
  55   bool IsDragDropInProgress() override;
  56
  57   // Overridden from ui::EventHandler:
  58   void OnKeyEvent(ui::KeyEvent* event) override;
  59   void OnMouseEvent(ui::MouseEvent* event) override;
  60   void OnTouchEvent(ui::TouchEvent* event) override;
  61   void OnGestureEvent(ui::GestureEvent* event) override;
  62
  63   // Overridden from aura::WindowObserver.
  64   void OnWindowDestroyed(aura::Window* window) override;
  65
  66  protected:
  67   // Helper method to create a LinearAnimation object that will run the drag
  68   // cancel animation. Caller take ownership of the returned object. Protected
  69   // for testing.
  70   virtual gfx::LinearAnimation* CreateCancelAnimation(
  71       int duration,
  72       int frame_rate,
  73       gfx::AnimationDelegate* delegate);
  74
  75   // Actual implementation of |DragCancel()|. protected for testing.
  76   virtual void DoDragCancel(int drag_cancel_animation_duration_ms);
  77
  78  private:
  79   friend class ash::test::DragDropControllerTest;
  80
  81   // Overridden from gfx::AnimationDelegate:
  82   void AnimationEnded(const gfx::Animation* animation) override;
  83   void AnimationProgressed(const gfx::Animation* animation) override;
  84   void AnimationCanceled(const gfx::Animation* animation) override;
  85
  86   // Helper method to start drag widget flying back animation.
  87   void StartCanceledAnimation(int animation_duration_ms);
  88
  89   // Helper method to forward |pending_log_tap_| event to |drag_source_window_|.
  90   void ForwardPendingLongTap();
  91
  92   // Helper method to reset everything.
  93   void Cleanup();
  94
  95   scoped_ptr<DragImageView> drag_image_;
  96   gfx::Vector2d drag_image_offset_;
  97   const ui::OSExchangeData* drag_data_;
  98   int drag_operation_;
  99
 100   // Window that is currently under the drag cursor.
 101   aura::Window* drag_window_;
 102
 103   // Starting and final bounds for the drag image for the drag cancel animation.
 104   gfx::Rect drag_image_initial_bounds_for_cancel_animation_;
 105   gfx::Rect drag_image_final_bounds_for_cancel_animation_;
 106
 107   scoped_ptr<gfx::LinearAnimation> cancel_animation_;
 108
 109   // Window that started the drag.
 110   aura::Window* drag_source_window_;
 111
 112   // Indicates whether the caller should be blocked on a drag/drop session.
 113   // Only be used for tests.
 114   bool should_block_during_drag_drop_;
 115
 116   // Closure for quitting nested message loop.
 117   base::Closure quit_closure_;
 118
 119   scoped_ptr<ash::DragDropTracker> drag_drop_tracker_;
 120   scoped_ptr<DragDropTrackerDelegate> drag_drop_window_delegate_;
 121
 122   ui::DragDropTypes::DragEventSource current_drag_event_source_;
 123
 124   // Holds a synthetic long tap event to be sent to the |drag_source_window_|.
 125   // See comment in OnGestureEvent() on why we need this.
 126   scoped_ptr<ui::GestureEvent> pending_long_tap_;
 127
 128   base::WeakPtrFactory<DragDropController> weak_factory_;
 129
 130   DISALLOW_COPY_AND_ASSIGN(DragDropController);
 131 };
 132
 133 }  // namespace ash
 134
 135 #endif  // ASH_DRAG_DROP_DRAG_DROP_CONTROLLER_H_