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// Copyright (c) 2009 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.
//
// A helper class for animating the display of native widget content.
// Currently only handle vertical sliding, but could be extended to handle
// horizontal slides or other types of animations.
#ifndef CHROME_BROWSER_GTK_SLIDE_ANIMATOR_GTK_H_
#define CHROME_BROWSER_GTK_SLIDE_ANIMATOR_GTK_H_
#include "base/scoped_ptr.h"
#include "chrome/common/animation.h"
#include "chrome/common/owned_widget_gtk.h"
class SlideAnimation;
typedef struct _GtkWidget GtkWidget;
class SlideAnimatorGtk : public AnimationDelegate {
public:
class Delegate {
public:
// Called when a call to Close() finishes animating.
virtual void Closed() = 0;
};
enum Direction {
DOWN,
UP
};
// |child| is the widget we pack into |widget_|.
// |direction| indicates which side the contents will appear to come from.
// |duration| is the duration of the slide in milliseconds, or 0 for default.
// |linear| controls how the animation progresses. If true, the
// velocity of the slide is constant over time, otherwise it goes a bit faster
// at the beginning and slows to a halt.
// |delegate| may be NULL.
SlideAnimatorGtk(GtkWidget* child,
Direction direction,
int duration,
bool linear,
Delegate* delegate);
virtual ~SlideAnimatorGtk();
GtkWidget* widget() { return widget_.get(); }
// Slide open.
void Open();
// Immediately show the widget.
void OpenWithoutAnimation();
// Slide shut.
void Close();
// Returns whether the widget is visible.
bool IsShowing();
// AnimationDelegate implementation.
void AnimationProgressed(const Animation* animation);
void AnimationEnded(const Animation* animation);
private:
scoped_ptr<SlideAnimation> animation_;
// The top level widget of the SlideAnimatorGtk. It is a GtkFixed.
OwnedWidgetGtk widget_;
// The widget passed to us at construction time, and the only direct child of
// |widget_|.
GtkWidget* child_;
// The direction of the slide.
Direction direction_;
// The object to inform about certain events. It may be NULL.
Delegate* delegate_;
};
#endif // CHROME_BROWSER_GTK_SLIDE_ANIMATOR_GTK_H_
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