[Win] App launcher drag/drop.

ui/app_list/views/apps_grid_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_VIEWS_APPS_GRID_VIEW_H_
 #define UI_APP_LIST_VIEWS_APPS_GRID_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/timer.h"
 #include "ui/app_list/app_list_export.h"
 #include "ui/app_list/app_list_model.h"
 #include "ui/app_list/app_list_model_observer.h"
 #include "ui/app_list/pagination_model_observer.h"
+#include "ui/base/dragdrop/drag_source_win.h"

[xiyuan, 2013/06/19 05:41:38]

Shouldn't this be wrapped in a #if defined(OS_WIN)?

[koz (OOO until 15th September), 2013/06/19 07:55:08]

Done.

 #include "ui/base/models/list_model_observer.h"
 #include "ui/views/animation/bounds_animator.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/view.h"
 #include "ui/views/view_model.h"
 
 namespace views {
 class ButtonListener;
 class DragImageView;
 }
 
 namespace app_list {
 
+#if defined(OS_WIN)
+class SynchronousDrag;
+#endif
+
 namespace test {
 class AppsGridViewTestApi;
 }
 
 class ApplicationDragAndDropHost;
 class AppListItemView;
 class AppsGridViewDelegate;
 class PageSwitcher;
 class PaginationModel;
 
@@ skipping 25 matching lines @@
   void ClearSelectedView(views::View* view);
   bool IsSelectedView(const views::View* view) const;
 
   // Ensures the view is visible. Note that if there is a running page
   // transition, this does nothing.
   void EnsureViewVisible(const views::View* view);
 
   void InitiateDrag(AppListItemView* view,
                     Pointer pointer,
                     const ui::LocatedEvent& event);
-  void UpdateDrag(AppListItemView* view,
-                  Pointer pointer,
-                  const ui::LocatedEvent& event);
+
+  // Called from AppListItemView when it receives a drag event.
+  void UpdateDragFromItem(Pointer pointer,
+                          const ui::LocatedEvent& event);
+
+  // Called when the user is dragging an app. |point| is in grid view
+  // coordinates.
+  void UpdateDrag(Pointer pointer, const gfx::Point& point);
   void EndDrag(bool cancel);
   bool IsDraggedView(const views::View* view) const;
 
+  void StartSettingUpSynchronousDrag();
+  bool RunSynchronousDrag();
+  void CleanUpSynchronousDrag();
+  void OnGotShortcutPath(const base::FilePath& path);
+
   // Set the drag and drop host for application links.
   void SetDragAndDropHostOfCurrentAppList(
       ApplicationDragAndDropHost* drag_and_drop_host);
 
   // Prerenders the icons on and around |page_index|.
   void Prerender(int page_index);
 
   bool has_dragged_view() const { return drag_view_ != NULL; }
   bool dragging() const { return drag_pointer_ != NONE; }
 
   // Overridden from views::View:
   virtual gfx::Size GetPreferredSize() OVERRIDE;
   virtual void Layout() OVERRIDE;
   virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
   virtual bool OnKeyReleased(const ui::KeyEvent& event) OVERRIDE;
   virtual void ViewHierarchyChanged(
       const ViewHierarchyChangedDetails& details) OVERRIDE;
+  virtual bool GetDropFormats(
+      int* formats,
+      std::set<OSExchangeData::CustomFormat>* custom_formats) OVERRIDE;
+  virtual bool CanDrop(const OSExchangeData& data) OVERRIDE;
+  virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
+
+  // Stops the timer that triggers a page flip during a drag.
+  void StopPageFlipTimer();
 
   // Get the last grid view which was created.
   static AppsGridView* GetLastGridViewForTest();
 
   // Return the view model for test purposes.
   const views::ViewModel* view_model_for_test() const { return &view_model_; }
 
   // For test: Return if the drag and drop handler was set.
   bool has_drag_and_drop_host_for_test() { return NULL != drag_and_drop_host_; }
 
@@ skipping 64 matching lines @@
                            gfx::Point* drag_point);
 
   // Calculates |drop_target_| based on |drag_point|. |drag_point| is in the
   // grid view's coordinates. When |use_page_button_hovering| is true and
   // |drag_point| is hovering on a page button, use the last slot on that page
   // as drop target.
   void CalculateDropTarget(const gfx::Point& drag_point,
                            bool use_page_button_hovering);
 
   // Dispatch the drag and drop update event to the dnd host (if needed).
-  void DispatchDragEventToDragAndDropHost(const ui::LocatedEvent& event);
+  void DispatchDragEventToDragAndDropHost(const gfx::Point& point);
 
   // Starts the page flip timer if |drag_point| is in left/right side page flip
   // zone or is over page switcher.
   void MaybeStartPageFlipTimer(const gfx::Point& drag_point);
 
   // Invoked when |page_flip_timer_| fires.
   void OnPageFlipTimer();
 
   // Updates |model_| to move item represented by |item_view| to |target| slot.
   void MoveItemInModel(views::View* item_view, const Index& target);
@@ skipping 31 matching lines @@
 
   // Tracks app item views. There is a view per item in |model_|.
   views::ViewModel view_model_;
 
   // Tracks pulsing block views.
   views::ViewModel pulsing_blocks_model_;
 
   views::View* selected_view_;
 
   AppListItemView* drag_view_;
-  gfx::Point drag_start_;
+
+  // The point where the drag started in AppListItemView coordinates.
+  gfx::Point drag_view_offset_;
+
+  // The point where the drag started in GridView coordinates.
+  gfx::Point drag_start_grid_view_;
+
+  // The location of |drag_view_| when the drag started.
+  gfx::Point drag_view_start_;
+
+#if defined(OS_WIN)
+  // Created when a drag is started (ie: drag exceeds the drag threshold), but
+  // not Run() until supplied with a shortcut path.
+  scoped_refptr<SynchronousDrag> synchronous_drag_;
+#endif
+
   Pointer drag_pointer_;
   Index drop_target_;
 
   // An application target drag and drop host which accepts dnd operations.
   ApplicationDragAndDropHost* drag_and_drop_host_;
 
   // The drag operation is currently inside the dnd host and events get
   // forwarded.
   bool forward_events_to_drag_and_drop_host_;
 
@@ skipping 11 matching lines @@
   int page_flip_delay_in_ms_;
 
   views::BoundsAnimator bounds_animator_;
 
   DISALLOW_COPY_AND_ASSIGN(AppsGridView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APPS_GRID_VIEW_H_