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// 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_VIEWS_ANIMATION_BOUNDS_ANIMATOR_H_
#define UI_VIEWS_ANIMATION_BOUNDS_ANIMATOR_H_
#pragma once
#include <map>
#include "base/compiler_specific.h"
#include "base/memory/ref_counted.h"
#include "ui/base/animation/animation_container_observer.h"
#include "ui/base/animation/animation_delegate.h"
#include "ui/gfx/rect.h"
#include "ui/views/views_export.h"
namespace ui {
class SlideAnimation;
}
namespace views {
class BoundsAnimator;
class View;
class BoundsAnimatorObserver {
public:
// Invoked when all animations are complete.
virtual void OnBoundsAnimatorDone(BoundsAnimator* animator) = 0;
};
// Bounds animator is responsible for animating the bounds of a view from the
// the views current location and size to a target position and size. To use
// BoundsAnimator invoke AnimateViewTo for the set of views you want to
// animate.
//
// BoundsAnimator internally creates an animation for each view. If you need
// a specific animation invoke SetAnimationForView after invoking AnimateViewTo.
// You can attach an AnimationDelegate to the individual animation for a view
// by way of SetAnimationDelegate. Additionally you can attach an observer to
// the BoundsAnimator that is notified when all animations are complete.
class VIEWS_EXPORT BoundsAnimator : public ui::AnimationDelegate,
public ui::AnimationContainerObserver {
public:
// If |delete_when_done| is set to true in |SetAnimationDelegate| the
// |AnimationDelegate| must subclass this class.
class OwnedAnimationDelegate : public ui::AnimationDelegate {
public:
virtual ~OwnedAnimationDelegate() {}
};
explicit BoundsAnimator(View* view);
virtual ~BoundsAnimator();
// Starts animating |view| from its current bounds to |target|. If there is
// already an animation running for the view it's stopped and a new one
// started. If an AnimationDelegate has been set for |view| it is removed
// (after being notified that the animation was canceled).
void AnimateViewTo(View* view, const gfx::Rect& target);
// Similar to |AnimateViewTo|, but does not reset the animation, only the
// target bounds. If |view| is not being animated this is the same as
// invoking |AnimateViewTo|.
void SetTargetBounds(View* view, const gfx::Rect& target);
// Sets the animation for the specified view. BoundsAnimator takes ownership
// of the specified animation.
void SetAnimationForView(View* view, ui::SlideAnimation* animation);
// Returns the animation for the specified view. BoundsAnimator owns the
// returned Animation.
const ui::SlideAnimation* GetAnimationForView(View* view);
// Stops animating the specified view.
void StopAnimatingView(View* view);
// Sets the delegate for the animation created for the specified view. If
// |delete_when_done| is true the |delegate| is deleted when done and
// |delegate| must subclass OwnedAnimationDelegate.
void SetAnimationDelegate(View* view,
ui::AnimationDelegate* delegate,
bool delete_when_done);
// Returns true if BoundsAnimator is animating the bounds of |view|.
bool IsAnimating(View* view) const;
// Returns true if BoundsAnimator is animating any view.
bool IsAnimating() const;
// Cancels all animations, leaving the views at their current location and
// size. Any views marked for deletion are deleted.
void Cancel();
void set_observer(BoundsAnimatorObserver* observer) {
observer_ = observer;
}
protected:
// Creates the animation to use for animating views.
virtual ui::SlideAnimation* CreateAnimation();
private:
// Tracks data about the view being animated.
struct Data {
Data()
: delete_delegate_when_done(false),
animation(NULL),
delegate(NULL) {}
// If true the delegate is deleted when done.
bool delete_delegate_when_done;
// The initial bounds.
gfx::Rect start_bounds;
// Target bounds.
gfx::Rect target_bounds;
// The animation. We own this.
ui::SlideAnimation* animation;
// Additional delegate for the animation, may be null.
ui::AnimationDelegate* delegate;
};
// Used by AnimationEndedOrCanceled.
enum AnimationEndType {
ANIMATION_ENDED,
ANIMATION_CANCELED
};
typedef std::map<View*, Data> ViewToDataMap;
typedef std::map<const ui::Animation*, View*> AnimationToViewMap;
// Removes references to |view| and its animation. This does NOT delete the
// animation or delegate.
void RemoveFromMaps(View* view);
// Does the necessary cleanup for |data|. If |send_cancel| is true and a
// delegate has been installed on |data| AnimationCanceled is invoked on it.
void CleanupData(bool send_cancel, Data* data, View* view);
// Used when changing the animation for a view. This resets the maps for
// the animation used by view and returns the current animation. Ownership
// of the returned animation passes to the caller.
ui::Animation* ResetAnimationForView(View* view);
// Invoked from AnimationEnded and AnimationCanceled.
void AnimationEndedOrCanceled(const ui::Animation* animation,
AnimationEndType type);
// ui::AnimationDelegate overrides.
virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
virtual void AnimationCanceled(const ui::Animation* animation) OVERRIDE;
// ui::AnimationContainerObserver overrides.
virtual void AnimationContainerProgressed(
ui::AnimationContainer* container) OVERRIDE;
virtual void AnimationContainerEmpty(
ui::AnimationContainer* container) OVERRIDE;
// Parent of all views being animated.
View* parent_;
BoundsAnimatorObserver* observer_;
// All animations we create up with the same container.
scoped_refptr<ui::AnimationContainer> container_;
// Maps from view being animated to info about the view.
ViewToDataMap data_;
// Maps from animation to view.
AnimationToViewMap animation_to_view_;
// As the animations we create update (AnimationProgressed is invoked) this
// is updated. When all the animations have completed for a given tick of
// the timer (AnimationContainerProgressed is invoked) the parent_ is asked
// to repaint these bounds.
gfx::Rect repaint_bounds_;
DISALLOW_COPY_AND_ASSIGN(BoundsAnimator);
};
} // namespace views
#endif // UI_VIEWS_ANIMATION_BOUNDS_ANIMATOR_H_