1 // Copyright (c) 2012 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 #ifndef CHROME_BROWSER_UI_GTK_THROBBER_GTK_H_ 6 #define CHROME_BROWSER_UI_GTK_THROBBER_GTK_H_ 7 8 #include <gtk/gtk.h> 9 10 #include "base/compiler_specific.h" 11 #include "content/public/browser/notification_observer.h" 12 #include "content/public/browser/notification_registrar.h" 13 #include "ui/base/animation/animation_delegate.h" 14 #include "ui/base/animation/slide_animation.h" 15 #include "ui/base/gtk/gtk_signal.h" 16 #include "ui/base/gtk/owned_widget_gtk.h" 17 #include "ui/gfx/image/image.h" 18 19 class GtkThemeService; 20 class SkBitmap; 21 22 // An animating throbber. 23 class ThrobberGtk : public ui::AnimationDelegate, 24 public content::NotificationObserver { 25 public: 26 // |theme_service| must not be NULL. 27 explicit ThrobberGtk(GtkThemeService* theme_service); 28 virtual ~ThrobberGtk(); 29 30 // Start or stop the throbbing animation. 31 void Start(); 32 void Stop(); 33 34 GtkWidget* widget() const { return widget_.get(); } 35 36 // ui::AnimationDelegate implementation. 37 virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE; 38 virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE; 39 40 // content::NotificationObserver implementation. 41 virtual void Observe(int type, 42 const content::NotificationSource& source, 43 const content::NotificationDetails& details) OVERRIDE; 44 45 private: 46 CHROMEGTK_CALLBACK_1(ThrobberGtk, gboolean, OnExpose, GdkEventExpose*); 47 48 // Initialize the widget. 49 void Init(); 50 51 // Load the animation frames from IDR_THROBBER. 52 void LoadFrames(); 53 54 content::NotificationRegistrar registrar_; 55 56 // The theme service. Weak pointer. 57 GtkThemeService* theme_service_; 58 59 // The actual GtkWidget. 60 ui::OwnedWidgetGtk widget_; 61 62 // A linear animation over the loaded frames. 63 ui::SlideAnimation animation_; 64 65 // The image containing the throbber frames. 66 gfx::Image frames_; 67 68 // The number of frames in |frames_|. 69 int num_frames_; 70 71 DISALLOW_COPY_AND_ASSIGN(ThrobberGtk); 72 }; 73 74 #endif // CHROME_BROWSER_UI_GTK_THROBBER_GTK_H_ 75
