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Side by Side Diff: mash/wm/move_loop.h

Issue 1459653002: Gets mustash frames looking like that of ash (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: update test Created 5 years, 1 month ago
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1 // Copyright 2015 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 MASH_WM_MOVE_LOOP_H_
6 #define MASH_WM_MOVE_LOOP_H_
7
8 #include "base/macros.h"
9 #include "base/memory/scoped_ptr.h"
10 #include "components/mus/public/cpp/window_observer.h"
11 #include "components/mus/public/interfaces/input_events.mojom.h"
12 #include "ui/gfx/geometry/point.h"
13 #include "ui/gfx/geometry/rect.h"
14
15 // MoveLoop is responsible for moving/resizing windows.
16 class MoveLoop : public mus::WindowObserver {
17 public:
18 enum MoveResult {
19 // The move is still ongoing.
20 CONTINUE,
21
22 // The move is done and the MoveLoop should be destroyed.
23 DONE,
24 };
25
26 enum class HorizontalLocation {
27 LEFT,
28 RIGHT,
29 OTHER,
30 };
31
32 enum class VerticalLocation {
33 TOP,
34 BOTTOM,
35 OTHER,
36 };
37
38 // Number of pixels in which a resize is triggered.
39 static const int kResizeSize = 8;
40
41 ~MoveLoop() override;
42
43 // If a move/resize loop should occur for the specified parameters creates
44 // and returns a new MoveLoop. All events should be funneled to the MoveLoop
45 // until done (Move()).
46 static scoped_ptr<MoveLoop> Create(mus::Window* target,
47 const mus::mojom::Event& event);
48
49 // Processes an event for a move/resize loop.
50 MoveResult Move(const mus::mojom::Event& event);
51
52 private:
53 enum class Type {
54 MOVE,
55 RESIZE,
56 };
57
58 MoveLoop(mus::Window* target,
59 const mus::mojom::Event& event,
60 Type type,
61 HorizontalLocation h_loc,
62 VerticalLocation v_loc);
63
64 static void DetermineType(mus::Window* target,
65 const gfx::Point& location,
66 Type* type,
67 HorizontalLocation* h_loc,
68 VerticalLocation* v_loc);
69
70 // Does the actual move/resize.
71 void MoveImpl(const mus::mojom::Event& event);
72
73 // Cancels the loop. This sets |target_| to null and removes the observer.
74 // After this the MoveLoop is still ongoing and won't stop until the
75 // appropriate event is received.
76 void Cancel();
77
78 void Revert();
79
80 gfx::Rect DetermineBoundsFromDelta(const gfx::Vector2d& delta);
81
82 // mus::WindowObserver:
83 void OnTreeChanged(const TreeChangeParams& params) override;
84 void OnWindowBoundsChanged(mus::Window* window,
85 const gfx::Rect& old_bounds,
86 const gfx::Rect& new_bounds) override;
87 void OnWindowVisibilityChanged(mus::Window* window) override;
88
89 // The window this MoveLoop is acting on. |target_| is set to null if the
90 // window unexpectedly changes while the move is in progress.
91 mus::Window* target_;
92
93 const Type type_;
94 const HorizontalLocation h_loc_;
95 const VerticalLocation v_loc_;
96
97 // The id of the pointer that triggered the move.
98 const int32_t pointer_id_;
99
100 // Location of the event (in screen coordinates) that triggered the move.
101 const gfx::Point initial_event_screen_location_;
102
103 // Original bounds of the window.
104 const gfx::Rect initial_window_bounds_;
105
106 const gfx::Rect initial_user_set_bounds_;
107
108 // Set to true when MoveLoop changes the bounds of |target_|. The move is
109 // canceled if the bounds change unexpectedly during the move.
110 bool changing_bounds_;
111
112 DISALLOW_COPY_AND_ASSIGN(MoveLoop);
113 };
114
115 #endif // MASH_WM_MOVE_LOOP_H_
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