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Diffstat (limited to 'ui/base/animation/slide_animation.h')
-rw-r--r-- | ui/base/animation/slide_animation.h | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/ui/base/animation/slide_animation.h b/ui/base/animation/slide_animation.h new file mode 100644 index 0000000..8f5e67c --- /dev/null +++ b/ui/base/animation/slide_animation.h @@ -0,0 +1,100 @@ +// Copyright (c) 2011 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. + +#ifndef UI_BASE_ANIMATION_SLIDE_ANIMATION_H_ +#define UI_BASE_ANIMATION_SLIDE_ANIMATION_H_ +#pragma once + +#include "ui/base/animation/linear_animation.h" +#include "ui/base/animation/tween.h" + +namespace ui { + +// Slide Animation +// +// Used for reversible animations and as a general helper class. Typical usage: +// +// #include "ui/base/animation/slide_animation.h" +// +// class MyClass : public AnimationDelegate { +// public: +// MyClass() { +// animation_.reset(new SlideAnimation(this)); +// animation_->SetSlideDuration(500); +// } +// void OnMouseOver() { +// animation_->Show(); +// } +// void OnMouseOut() { +// animation_->Hide(); +// } +// void AnimationProgressed(const Animation* animation) { +// if (animation == animation_.get()) { +// Layout(); +// SchedulePaint(); +// } else if (animation == other_animation_.get()) { +// ... +// } +// } +// void Layout() { +// if (animation_->is_animating()) { +// hover_image_.SetOpacity(animation_->GetCurrentValue()); +// } +// } +// private: +// scoped_ptr<SlideAnimation> animation_; +// } +class SlideAnimation : public LinearAnimation { + public: + explicit SlideAnimation(AnimationDelegate* target); + virtual ~SlideAnimation(); + + // Set the animation back to the 0 state. + virtual void Reset(); + virtual void Reset(double value); + + // Begin a showing animation or reverse a hiding animation in progress. + virtual void Show(); + + // Begin a hiding animation or reverse a showing animation in progress. + virtual void Hide(); + + // Sets the time a slide will take. Note that this isn't actually + // the amount of time an animation will take as the current value of + // the slide is considered. + virtual void SetSlideDuration(int duration); + int GetSlideDuration() const { return slide_duration_; } + void SetTweenType(Tween::Type tween_type) { tween_type_ = tween_type; } + + virtual double GetCurrentValue() const; + bool IsShowing() const { return showing_; } + bool IsClosing() const { return !showing_ && value_end_ < value_current_; } + + private: + // Overridden from Animation. + virtual void AnimateToState(double state); + + AnimationDelegate* target_; + + Tween::Type tween_type_; + + // Used to determine which way the animation is going. + bool showing_; + + // Animation values. These are a layer on top of Animation::state_ to + // provide the reversability. + double value_start_; + double value_end_; + double value_current_; + + // How long a hover in/out animation will last for. This defaults to + // kHoverFadeDurationMS, but can be overridden with SetDuration. + int slide_duration_; + + DISALLOW_COPY_AND_ASSIGN(SlideAnimation); +}; + +} // namespace ui + +#endif // UI_BASE_ANIMATION_SLIDE_ANIMATION_H_ |