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_DRAG_WINDOW_RESIZER_H_ 6 #define ASH_WM_DRAG_WINDOW_RESIZER_H_ 7 8 #include "ash/wm/window_resizer.h" 9 #include "base/compiler_specific.h" 10 #include "base/gtest_prod_util.h" 11 #include "base/memory/weak_ptr.h" 12 #include "ui/gfx/point.h" 13 14 namespace ash { 15 namespace internal { 16 17 class DragWindowController; 18 class TrayUser; 19 20 // DragWindowResizer is a decorator of WindowResizer and adds the ability to 21 // drag windows across displays. 22 class ASH_EXPORT DragWindowResizer : public WindowResizer { 23 public: 24 virtual ~DragWindowResizer(); 25 26 // Creates a new DragWindowResizer. The caller takes ownership of the 27 // returned object. The ownership of |next_window_resizer| is taken by the 28 // returned object. Returns NULL if not resizable. 29 static DragWindowResizer* Create(WindowResizer* next_window_resizer, 30 aura::Window* window, 31 const gfx::Point& location, 32 int window_component, 33 aura::client::WindowMoveSource source); 34 35 // WindowResizer: 36 virtual void Drag(const gfx::Point& location, int event_flags) OVERRIDE; 37 virtual void CompleteDrag(int event_flags) OVERRIDE; 38 virtual void RevertDrag() OVERRIDE; 39 virtual aura::Window* GetTarget() OVERRIDE; 40 virtual const gfx::Point& GetInitialLocation() const OVERRIDE; 41 42 private: 43 FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest, DragWindowController); 44 45 // Creates DragWindowResizer that adds the ability of dragging windows across 46 // displays to |next_window_resizer|. This object takes the ownership of 47 // |next_window_resizer|. 48 explicit DragWindowResizer(WindowResizer* next_window_resizer, 49 const Details& details); 50 51 // Updates the bounds of the phantom window for window dragging. Set true on 52 // |in_original_root| if the pointer is still in |window()->GetRootWindow()|. 53 void UpdateDragWindow(const gfx::Rect& bounds, bool in_original_root); 54 55 // Returns true if we should allow the mouse pointer to warp. 56 bool ShouldAllowMouseWarp(); 57 58 // Get the user drop target underneath the given |point_in_screen| or NULL. 59 TrayUser* GetTrayUserItemAtPoint(const gfx::Point& point_in_screen); 60 61 // Check if a completed drag might cause the window to change active desktops. 62 // If the call was causing a "transfer of ownership to another desktop" and it 63 // will return false indicating that no further processing is needed. 64 bool TryDraggingToNewUser(); 65 66 scoped_ptr<WindowResizer> next_window_resizer_; 67 68 // Shows a semi-transparent image of the window being dragged. 69 scoped_ptr<DragWindowController> drag_window_controller_; 70 71 const Details details_; 72 73 gfx::Point last_mouse_location_; 74 75 // Current instance for use by the DragWindowResizerTest. 76 static DragWindowResizer* instance_; 77 78 base::WeakPtrFactory<DragWindowResizer> weak_ptr_factory_; 79 80 DISALLOW_COPY_AND_ASSIGN(DragWindowResizer); 81 }; 82 83 } // namespace internal 84 } // namespace ash 85 86 #endif // ASH_WM_DRAG_WINDOW_RESIZER_H_ 87