| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright (c) 2012 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 "ui/base/animation/slide_animation.h" | |
| 6 | |
| 7 #include <math.h> | |
| 8 | |
| 9 namespace ui { | |
| 10 | |
| 11 // How many frames per second to target. | |
| 12 static const int kDefaultFrameRateHz = 60; | |
| 13 | |
| 14 // How long animations should take by default. | |
| 15 static const int kDefaultDurationMs = 120; | |
| 16 | |
| 17 SlideAnimation::SlideAnimation(AnimationDelegate* target) | |
| 18 : LinearAnimation(kDefaultFrameRateHz, target), | |
| 19 target_(target), | |
| 20 tween_type_(Tween::EASE_OUT), | |
| 21 showing_(false), | |
| 22 value_start_(0), | |
| 23 value_end_(0), | |
| 24 value_current_(0), | |
| 25 slide_duration_(kDefaultDurationMs) { | |
| 26 } | |
| 27 | |
| 28 SlideAnimation::~SlideAnimation() { | |
| 29 } | |
| 30 | |
| 31 void SlideAnimation::Reset() { | |
| 32 Reset(0); | |
| 33 } | |
| 34 | |
| 35 void SlideAnimation::Reset(double value) { | |
| 36 Stop(); | |
| 37 showing_ = static_cast<bool>(value == 1); | |
| 38 value_current_ = value; | |
| 39 } | |
| 40 | |
| 41 void SlideAnimation::Show() { | |
| 42 // If we're already showing (or fully shown), we have nothing to do. | |
| 43 if (showing_) | |
| 44 return; | |
| 45 | |
| 46 showing_ = true; | |
| 47 value_start_ = value_current_; | |
| 48 value_end_ = 1.0; | |
| 49 | |
| 50 // Make sure we actually have something to do. | |
| 51 if (slide_duration_ == 0) { | |
| 52 AnimateToState(1.0); // Skip to the end of the animation. | |
| 53 return; | |
| 54 } else if (value_current_ == value_end_) { | |
| 55 return; | |
| 56 } | |
| 57 | |
| 58 // This will also reset the currently-occurring animation. | |
| 59 SetDuration(static_cast<int>(slide_duration_ * (1 - value_current_))); | |
| 60 Start(); | |
| 61 } | |
| 62 | |
| 63 void SlideAnimation::Hide() { | |
| 64 // If we're already hiding (or hidden), we have nothing to do. | |
| 65 if (!showing_) | |
| 66 return; | |
| 67 | |
| 68 showing_ = false; | |
| 69 value_start_ = value_current_; | |
| 70 value_end_ = 0.0; | |
| 71 | |
| 72 // Make sure we actually have something to do. | |
| 73 if (slide_duration_ == 0) { | |
| 74 AnimateToState(0.0); // Skip to the end of the animation. | |
| 75 return; | |
| 76 } else if (value_current_ == value_end_) { | |
| 77 return; | |
| 78 } | |
| 79 | |
| 80 // This will also reset the currently-occurring animation. | |
| 81 SetDuration(static_cast<int>(slide_duration_ * value_current_)); | |
| 82 Start(); | |
| 83 } | |
| 84 | |
| 85 void SlideAnimation::SetSlideDuration(int duration) { | |
| 86 slide_duration_ = duration; | |
| 87 } | |
| 88 | |
| 89 double SlideAnimation::GetCurrentValue() const { | |
| 90 return value_current_; | |
| 91 } | |
| 92 | |
| 93 void SlideAnimation::AnimateToState(double state) { | |
| 94 if (state > 1.0) | |
| 95 state = 1.0; | |
| 96 | |
| 97 state = Tween::CalculateValue(tween_type_, state); | |
| 98 | |
| 99 value_current_ = value_start_ + (value_end_ - value_start_) * state; | |
| 100 | |
| 101 // Implement snapping. | |
| 102 if (tween_type_ == Tween::EASE_OUT_SNAP && | |
| 103 fabs(value_current_ - value_end_) <= 0.06) | |
| 104 value_current_ = value_end_; | |
| 105 | |
| 106 // Correct for any overshoot (while state may be capped at 1.0, let's not | |
| 107 // take any rounding error chances. | |
| 108 if ((value_end_ >= value_start_ && value_current_ > value_end_) || | |
| 109 (value_end_ < value_start_ && value_current_ < value_end_)) { | |
| 110 value_current_ = value_end_; | |
| 111 } | |
| 112 } | |
| 113 | |
| 114 } // namespace ui | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 23531053:
ui/base/animation -> ui/gfx/animation (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src