Index: remoting/client/fling_animation.cc |
diff --git a/remoting/client/fling_animation.cc b/remoting/client/fling_animation.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..109a5c4e3d0d85dce4c4f0c37f26c7cbd522c1f0 |
--- /dev/null |
+++ b/remoting/client/fling_animation.cc |
@@ -0,0 +1,46 @@ |
+// Copyright 2017 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "remoting/client/fling_animation.h" |
+ |
+#include "base/time/default_tick_clock.h" |
+ |
+namespace remoting { |
+ |
+FlingAnimation::FlingAnimation(float time_constant, |
+ const FlingCallback& fling_callback) |
+ : fling_tracker_(time_constant), |
+ fling_callback_(fling_callback), |
+ clock_(new base::DefaultTickClock()) {} |
+ |
+FlingAnimation::~FlingAnimation() {} |
+ |
+void FlingAnimation::SetVelocity(float velocity_x, float velocity_y) { |
+ fling_tracker_.StartFling(velocity_x, velocity_y); |
+ fling_start_time_ = clock_->NowTicks(); |
+} |
+ |
+bool FlingAnimation::IsAnimationInProgress() const { |
+ return fling_tracker_.IsFlingInProgress(); |
+} |
+ |
+void FlingAnimation::Tick() { |
+ float dx, dy; |
+ bool in_progress = fling_tracker_.TrackMovement( |
+ clock_->NowTicks() - fling_start_time_, &dx, &dy); |
+ if (in_progress) { |
+ fling_callback_.Run(dx, dy); |
+ } |
+} |
+ |
+void FlingAnimation::Abort() { |
+ fling_tracker_.StopFling(); |
+} |
+ |
+void FlingAnimation::SetTickClockForTest( |
+ std::unique_ptr<base::TickClock> clock) { |
+ clock_ = std::move(clock); |
+} |
+ |
+} // namespace remoting |