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| 1 // Copyright (c) 2010 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 "app/linear_animation.h" | |
| 6 | |
| 7 #include <math.h> | |
| 8 | |
| 9 #include "app/animation_container.h" | |
| 10 #include "app/animation_delegate.h" | |
| 11 | |
| 12 using base::Time; | |
| 13 using base::TimeDelta; | |
| 14 | |
| 15 static TimeDelta CalculateInterval(int frame_rate) { | |
| 16 int timer_interval = 1000000 / frame_rate; | |
| 17 if (timer_interval < 10000) | |
| 18 timer_interval = 10000; | |
| 19 return TimeDelta::FromMicroseconds(timer_interval); | |
| 20 } | |
| 21 | |
| 22 LinearAnimation::LinearAnimation(int frame_rate, | |
| 23 AnimationDelegate* delegate) | |
| 24 : Animation(CalculateInterval(frame_rate)), | |
| 25 state_(0.0), | |
| 26 in_end_(false) { | |
| 27 set_delegate(delegate); | |
| 28 } | |
| 29 | |
| 30 LinearAnimation::LinearAnimation(int duration, | |
| 31 int frame_rate, | |
| 32 AnimationDelegate* delegate) | |
| 33 : Animation(CalculateInterval(frame_rate)), | |
| 34 duration_(TimeDelta::FromMilliseconds(duration)), | |
| 35 state_(0.0), | |
| 36 in_end_(false) { | |
| 37 set_delegate(delegate); | |
| 38 SetDuration(duration); | |
| 39 } | |
| 40 | |
| 41 double LinearAnimation::GetCurrentValue() const { | |
| 42 // Default is linear relationship, subclass to adapt. | |
| 43 return state_; | |
| 44 } | |
| 45 | |
| 46 void LinearAnimation::End() { | |
| 47 if (!is_animating()) | |
| 48 return; | |
| 49 | |
| 50 // NOTE: We don't use AutoReset here as Stop may end up deleting us (by way | |
| 51 // of the delegate). | |
| 52 in_end_ = true; | |
| 53 Stop(); | |
| 54 } | |
| 55 | |
| 56 void LinearAnimation::SetDuration(int duration) { | |
| 57 duration_ = TimeDelta::FromMilliseconds(duration); | |
| 58 if (duration_ < timer_interval()) | |
| 59 duration_ = timer_interval(); | |
| 60 if (is_animating()) | |
| 61 SetStartTime(container()->last_tick_time()); | |
| 62 } | |
| 63 | |
| 64 void LinearAnimation::Step(base::TimeTicks time_now) { | |
| 65 TimeDelta elapsed_time = time_now - start_time(); | |
| 66 state_ = static_cast<double>(elapsed_time.InMicroseconds()) / | |
| 67 static_cast<double>(duration_.InMicroseconds()); | |
| 68 if (state_ >= 1.0) | |
| 69 state_ = 1.0; | |
| 70 | |
| 71 AnimateToState(state_); | |
| 72 | |
| 73 if (delegate()) | |
| 74 delegate()->AnimationProgressed(this); | |
| 75 | |
| 76 if (state_ == 1.0) | |
| 77 Stop(); | |
| 78 } | |
| 79 | |
| 80 void LinearAnimation::AnimationStopped() { | |
| 81 if (!in_end_) | |
| 82 return; | |
| 83 | |
| 84 in_end_ = false; | |
| 85 // Set state_ to ensure we send ended to delegate and not canceled. | |
| 86 state_ = 1; | |
| 87 AnimateToState(1.0); | |
| 88 } | |
| 89 | |
| 90 bool LinearAnimation::ShouldSendCanceledFromStop() { | |
| 91 return state_ != 1; | |
| 92 } | |
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Chromium Code Reviews
Issue 6154001:
Move animation code to new ui/base/animation directory.... (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src/