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[chromium-blink-merge.git] / ash / wm / drag_window_resizer.h
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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.
5 #ifndef ASH_WM_DRAG_WINDOW_RESIZER_H_
6 #define ASH_WM_DRAG_WINDOW_RESIZER_H_
8 #include "ash/wm/window_resizer.h"
9 #include "base/compiler_specific.h"
10 #include "base/gtest_prod_util.h"
11 #include "base/memory/scoped_vector.h"
12 #include "base/memory/weak_ptr.h"
13 #include "ui/gfx/geometry/point.h"
15 namespace ash {
17 class DragWindowController;
19 // DragWindowResizer is a decorator of WindowResizer and adds the ability to
20 // drag windows across displays.
21 class ASH_EXPORT DragWindowResizer : public WindowResizer {
22 public:
23 ~DragWindowResizer() override;
25 // Creates a new DragWindowResizer. The caller takes ownership of the
26 // returned object. The ownership of |next_window_resizer| is taken by the
27 // returned object. Returns NULL if not resizable.
28 static DragWindowResizer* Create(WindowResizer* next_window_resizer,
29 wm::WindowState* window_state);
31 // WindowResizer:
32 void Drag(const gfx::Point& location, int event_flags) override;
33 void CompleteDrag() override;
34 void RevertDrag() override;
36 private:
37 FRIEND_TEST_ALL_PREFIXES(DragWindowResizerTest, DragWindowController);
39 // Creates DragWindowResizer that adds the ability of dragging windows across
40 // displays to |next_window_resizer|. This object takes the ownership of
41 // |next_window_resizer|.
42 explicit DragWindowResizer(WindowResizer* next_window_resizer,
43 wm::WindowState* window_state);
45 // Updates the bounds of the phantom window for window dragging. Set true on
46 // |in_original_root| if the pointer is still in |window()->GetRootWindow()|.
47 void UpdateDragWindow(const gfx::Rect& bounds, bool in_original_root);
49 // Returns true if we should allow the mouse pointer to warp.
50 bool ShouldAllowMouseWarp();
52 scoped_ptr<WindowResizer> next_window_resizer_;
54 // Shows a semi-transparent image of the window being dragged.
55 ScopedVector<DragWindowController> drag_window_controllers_;
57 gfx::Point last_mouse_location_;
59 // Current instance for use by the DragWindowResizerTest.
60 static DragWindowResizer* instance_;
62 base::WeakPtrFactory<DragWindowResizer> weak_ptr_factory_;
64 DISALLOW_COPY_AND_ASSIGN(DragWindowResizer);
67 } // namespace ash
69 #endif // ASH_WM_DRAG_WINDOW_RESIZER_H_