ui/base/animation -> ui/gfx/animation
I also made GFX_EXPORT real, which is ok since it's the same as
UI_EXPORT. It'll only matter when we separate out at gyp level.
BUG=none
TEST=none
[email protected]
Review URL: https://codereview.chromium.org/23531053
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@223289 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/ui/gfx/animation/slide_animation.cc b/ui/gfx/animation/slide_animation.cc
new file mode 100644
index 0000000..d08ac41
--- /dev/null
+++ b/ui/gfx/animation/slide_animation.cc
@@ -0,0 +1,114 @@
+// Copyright (c) 2012 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 "ui/gfx/animation/slide_animation.h"
+
+#include <math.h>
+
+namespace gfx {
+
+// How many frames per second to target.
+static const int kDefaultFrameRateHz = 60;
+
+// How long animations should take by default.
+static const int kDefaultDurationMs = 120;
+
+SlideAnimation::SlideAnimation(AnimationDelegate* target)
+ : LinearAnimation(kDefaultFrameRateHz, target),
+ target_(target),
+ tween_type_(Tween::EASE_OUT),
+ showing_(false),
+ value_start_(0),
+ value_end_(0),
+ value_current_(0),
+ slide_duration_(kDefaultDurationMs) {
+}
+
+SlideAnimation::~SlideAnimation() {
+}
+
+void SlideAnimation::Reset() {
+ Reset(0);
+}
+
+void SlideAnimation::Reset(double value) {
+ Stop();
+ showing_ = static_cast<bool>(value == 1);
+ value_current_ = value;
+}
+
+void SlideAnimation::Show() {
+ // If we're already showing (or fully shown), we have nothing to do.
+ if (showing_)
+ return;
+
+ showing_ = true;
+ value_start_ = value_current_;
+ value_end_ = 1.0;
+
+ // Make sure we actually have something to do.
+ if (slide_duration_ == 0) {
+ AnimateToState(1.0); // Skip to the end of the animation.
+ return;
+ } else if (value_current_ == value_end_) {
+ return;
+ }
+
+ // This will also reset the currently-occurring animation.
+ SetDuration(static_cast<int>(slide_duration_ * (1 - value_current_)));
+ Start();
+}
+
+void SlideAnimation::Hide() {
+ // If we're already hiding (or hidden), we have nothing to do.
+ if (!showing_)
+ return;
+
+ showing_ = false;
+ value_start_ = value_current_;
+ value_end_ = 0.0;
+
+ // Make sure we actually have something to do.
+ if (slide_duration_ == 0) {
+ AnimateToState(0.0); // Skip to the end of the animation.
+ return;
+ } else if (value_current_ == value_end_) {
+ return;
+ }
+
+ // This will also reset the currently-occurring animation.
+ SetDuration(static_cast<int>(slide_duration_ * value_current_));
+ Start();
+}
+
+void SlideAnimation::SetSlideDuration(int duration) {
+ slide_duration_ = duration;
+}
+
+double SlideAnimation::GetCurrentValue() const {
+ return value_current_;
+}
+
+void SlideAnimation::AnimateToState(double state) {
+ if (state > 1.0)
+ state = 1.0;
+
+ state = Tween::CalculateValue(tween_type_, state);
+
+ value_current_ = value_start_ + (value_end_ - value_start_) * state;
+
+ // Implement snapping.
+ if (tween_type_ == Tween::EASE_OUT_SNAP &&
+ fabs(value_current_ - value_end_) <= 0.06)
+ value_current_ = value_end_;
+
+ // Correct for any overshoot (while state may be capped at 1.0, let's not
+ // take any rounding error chances.
+ if ((value_end_ >= value_start_ && value_current_ > value_end_) ||
+ (value_end_ < value_start_ && value_current_ < value_end_)) {
+ value_current_ = value_end_;
+ }
+}
+
+} // namespace gfx
