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// Copyright 2013 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 "content/browser/renderer_host/synthetic_gesture_calculator.h"
namespace {
const float kDefaultPositionDelta = 10.0f;
}
namespace content {
SyntheticGestureCalculator::SyntheticGestureCalculator() {
}
SyntheticGestureCalculator::~SyntheticGestureCalculator() {
}
float SyntheticGestureCalculator::GetDelta(
base::TimeTicks now, base::TimeDelta desired_interval) {
float position_delta = kDefaultPositionDelta;
if (!last_tick_time_.is_null()) {
float velocity = kDefaultPositionDelta /
(float)desired_interval.InMillisecondsF();
float time_delta = (now - last_tick_time_).InMillisecondsF();
position_delta = velocity * time_delta;
}
last_tick_time_ = now;
return position_delta;
}
} // namespace content
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