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Issue 2736573002: chromeos: Move files in //ash/common to //ash, part 2 (Closed)
Patch Set: Created 3 years, 9 months ago
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1 // Copyright 2014 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 #include "ash/common/wm/workspace/two_step_edge_cycler.h"
6
7 #include <cstdlib>
8
9 namespace ash {
10 namespace {
11
12 // We cycle to the second mode if any of the following happens while the mouse
13 // is on the edge of the workspace:
14 // . The user stops moving the mouse for |kMaxDelay| and then moves the mouse
15 // again in the preferred direction from the last paused location for at least
16 // |kMaxPixelsAfterPause| horizontal pixels.
17 // . The mouse moves |kMaxPixels| horizontal pixels in the preferred direction.
18 // . The mouse is moved |kMaxMoves| times since the last pause.
19 const int kMaxDelay = 400;
20 const int kMaxPixels = 100;
21 const int kMaxPixelsAfterPause = 10;
22 const int kMaxMoves = 25;
23
24 } // namespace
25
26 TwoStepEdgeCycler::TwoStepEdgeCycler(const gfx::Point& start,
27 TwoStepEdgeCycler::Direction direction)
28 : second_mode_(false),
29 time_last_move_(base::TimeTicks::Now()),
30 num_moves_(0),
31 start_x_(start.x()),
32 paused_x_(start.x()),
33 paused_(false),
34 direction_(direction) {}
35
36 TwoStepEdgeCycler::~TwoStepEdgeCycler() {}
37
38 void TwoStepEdgeCycler::OnMove(const gfx::Point& location) {
39 if (second_mode_)
40 return;
41
42 if ((base::TimeTicks::Now() - time_last_move_).InMilliseconds() > kMaxDelay) {
43 paused_ = true;
44 paused_x_ = location.x();
45 num_moves_ = 0;
46 }
47 time_last_move_ = base::TimeTicks::Now();
48
49 int compare_x = paused_ ? paused_x_ : start_x_;
50 if (location.x() != compare_x &&
51 (location.x() < compare_x) != (direction_ == DIRECTION_LEFT)) {
52 return;
53 }
54
55 ++num_moves_;
56 bool moved_in_the_same_direction_after_pause =
57 paused_ && std::abs(location.x() - paused_x_) >= kMaxPixelsAfterPause;
58 second_mode_ = moved_in_the_same_direction_after_pause ||
59 std::abs(location.x() - start_x_) >= kMaxPixels ||
60 num_moves_ >= kMaxMoves;
61 }
62
63 } // namespace ash
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