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1 // Copyright 2017 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 "remoting/client/fling_animation.h" | |
6 | |
7 #include "base/time/default_tick_clock.h" | |
8 | |
9 namespace remoting { | |
10 | |
11 FlingAnimation::FlingAnimation(float time_constant, | |
12 const FlingCallback& fling_callback) | |
13 : fling_tracker_(time_constant), | |
14 fling_callback_(fling_callback), | |
15 clock_(new base::DefaultTickClock()) {} | |
16 | |
17 FlingAnimation::~FlingAnimation() {} | |
18 | |
19 void FlingAnimation::SetVelocity(float velocity_x, float velocity_y) { | |
20 fling_tracker_.StartFling(velocity_x, velocity_y); | |
21 fling_start_time_ = clock_->NowTicks(); | |
22 } | |
23 | |
24 bool FlingAnimation::IsAnimationInProgress() const { | |
25 return fling_tracker_.IsFlingInProgress(); | |
26 } | |
27 | |
28 void FlingAnimation::Tick() { | |
29 float dx, dy; | |
30 bool in_progress = fling_tracker_.TrackMovement( | |
31 clock_->NowTicks() - fling_start_time_, &dx, &dy); | |
nicholss
2017/05/11 15:13:50
I think this looks much cleaner, I hope you agree.
Yuwei
2017/05/11 18:26:27
Yep, and it's also for testability.
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32 if (in_progress) { | |
33 fling_callback_.Run(dx, dy); | |
34 } | |
35 } | |
36 | |
37 void FlingAnimation::Abort() { | |
38 fling_tracker_.StopFling(); | |
39 } | |
40 | |
41 void FlingAnimation::SetTickClockForTest( | |
42 std::unique_ptr<base::TickClock> clock) { | |
43 clock_ = std::move(clock); | |
44 } | |
45 | |
46 } // namespace remoting | |
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