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// 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.
#ifndef CHROME_BROWSER_UI_GTK_THROBBER_GTK_H_
#define CHROME_BROWSER_UI_GTK_THROBBER_GTK_H_
#pragma once
#include <gtk/gtk.h>
#include "base/compiler_specific.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
#include "ui/base/animation/animation_delegate.h"
#include "ui/base/animation/slide_animation.h"
#include "ui/base/gtk/gtk_signal.h"
#include "ui/base/gtk/owned_widget_gtk.h"
#include "ui/gfx/image/image.h"
class GtkThemeService;
class SkBitmap;
// An animating throbber.
class ThrobberGtk : public ui::AnimationDelegate,
public content::NotificationObserver {
public:
// |theme_service| must not be NULL.
explicit ThrobberGtk(GtkThemeService* theme_service);
virtual ~ThrobberGtk();
// Start or stop the throbbing animation.
void Start();
void Stop();
GtkWidget* widget() const { return widget_.get(); }
// ui::AnimationDelegate implementation.
virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
// content::NotificationObserver implementation.
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) OVERRIDE;
private:
CHROMEGTK_CALLBACK_1(ThrobberGtk, gboolean, OnExpose, GdkEventExpose*);
// Initialize the widget.
void Init();
// Load the animation frames from IDR_THROBBER.
void LoadFrames();
content::NotificationRegistrar registrar_;
// The theme service. Weak pointer.
GtkThemeService* theme_service_;
// The actual GtkWidget.
ui::OwnedWidgetGtk widget_;
// A linear animation over the loaded frames.
ui::SlideAnimation animation_;
// The image containing the throbber frames.
const gfx::Image* frames_;
// The number of frames in |frames_|.
int num_frames_;
DISALLOW_COPY_AND_ASSIGN(ThrobberGtk);
};
#endif // CHROME_BROWSER_UI_GTK_THROBBER_GTK_H_
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