ash/rotator/screen_rotation_animation.cc

   1 // Copyright 2015 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 "ash/rotator/screen_rotation_animation.h"
   6
   7 #include "base/time/time.h"
   8 #include "ui/compositor/layer.h"
   9 #include "ui/compositor/layer_animation_delegate.h"
  10 #include "ui/gfx/animation/tween.h"
  11 #include "ui/gfx/geometry/point.h"
  12 #include "ui/gfx/interpolated_transform.h"
  13 #include "ui/gfx/transform.h"
  14
  15 namespace ash {
  16
  17 ScreenRotationAnimation::ScreenRotationAnimation(
  18     ui::Layer* layer,
  19     int start_degrees,
  20     int end_degrees,
  21     float initial_opacity,
  22     float target_opacity,
  23     gfx::Point pivot,
  24     base::TimeDelta duration,
  25     gfx::Tween::Type tween_type)
  26     : ui::LayerAnimationElement(
  27           LayerAnimationElement::TRANSFORM | LayerAnimationElement::OPACITY,
  28           duration),
  29       tween_type_(tween_type),
  30       initial_opacity_(initial_opacity),
  31       target_opacity_(target_opacity) {
  32   scoped_ptr<ui::InterpolatedTransform> rotation(
  33       new ui::InterpolatedTransformAboutPivot(
  34           pivot, new ui::InterpolatedRotation(start_degrees, end_degrees)));
  35
  36   // Use the target transform/bounds in case the layer is already animating.
  37   gfx::Transform current_transform = layer->GetTargetTransform();
  38   interpolated_transform_.reset(
  39       new ui::InterpolatedConstantTransform(current_transform));
  40   interpolated_transform_->SetChild(rotation.release());
  41 }
  42
  43 ScreenRotationAnimation::~ScreenRotationAnimation() {
  44 }
  45
  46 void ScreenRotationAnimation::OnStart(ui::LayerAnimationDelegate* delegate) {
  47 }
  48
  49 bool ScreenRotationAnimation::OnProgress(double current,
  50                                          ui::LayerAnimationDelegate* delegate) {
  51   const double tweened = gfx::Tween::CalculateValue(tween_type_, current);
  52   delegate->SetTransformFromAnimation(
  53       interpolated_transform_->Interpolate(tweened));
  54   delegate->SetOpacityFromAnimation(gfx::Tween::FloatValueBetween(
  55       tweened, initial_opacity_, target_opacity_));
  56   return true;
  57 }
  58
  59 void ScreenRotationAnimation::OnGetTarget(TargetValue* target) const {
  60   target->transform = interpolated_transform_->Interpolate(1.0);
  61 }
  62
  63 void ScreenRotationAnimation::OnAbort(ui::LayerAnimationDelegate* delegate) {
  64 }
  65
  66 }  // namespace ash