ash/wm/drag_window_resizer.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_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 "ui/gfx/point.h"
  12
  13 namespace ash {
  14 namespace internal {
  15
  16 class DragWindowController;
  17
  18 // DragWindowResizer is a decorator of WindowResizer and adds the ability to
  19 // drag windows across displays.
  20 class ASH_EXPORT DragWindowResizer : public WindowResizer {
  21  public:
  22   virtual ~DragWindowResizer();
  23
  24   // Creates a new DragWindowResizer. The caller takes ownership of the
  25   // returned object. The ownership of |next_window_resizer| is taken by the
  26   // returned object. Returns NULL if not resizable.
  27   static DragWindowResizer* Create(WindowResizer* next_window_resizer,
  28                                    aura::Window* window,
  29                                    const gfx::Point& location,
  30                                    int window_component);
  31
  32   // WindowResizer overides:
  33   virtual void Drag(const gfx::Point& location, int event_flags) OVERRIDE;
  34   virtual void CompleteDrag(int event_flags) OVERRIDE;
  35   virtual void RevertDrag() OVERRIDE;
  36   virtual aura::Window* GetTarget() OVERRIDE;
  37
  38   const gfx::Point& GetInitialLocationInParentForTest() const {
  39     return details_.initial_location_in_parent;
  40   }
  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   scoped_ptr<WindowResizer> next_window_resizer_;
  59
  60   // Shows a semi-transparent image of the window being dragged.
  61   scoped_ptr<DragWindowController> drag_window_controller_;
  62
  63   const Details details_;
  64
  65   gfx::Point last_mouse_location_;
  66
  67   // If non-NULL the destructor sets this to true. Used to determine if this has
  68   // been deleted.
  69   bool* destroyed_;
  70
  71   DISALLOW_COPY_AND_ASSIGN(DragWindowResizer);
  72 };
  73
  74 }  // namespace internal
  75 }  // namespace aura
  76
  77 #endif  // ASH_WM_DRAG_WINDOW_RESIZER_H_