1 // Copyright (c) 2011 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_HOVER_CONTROLLER_GTK_H_ 6 #define CHROME_BROWSER_UI_GTK_HOVER_CONTROLLER_GTK_H_ 7 8 #include <gtk/gtk.h> 9 10 #include "base/compiler_specific.h" 11 #include "ui/base/gtk/gtk_signal.h" 12 #include "ui/base/gtk/gtk_signal_registrar.h" 13 #include "ui/gfx/animation/animation_delegate.h" 14 #include "ui/gfx/animation/slide_animation.h" 15 #include "ui/gfx/animation/throb_animation.h" 16 17 // This class handles the "throbbing" of a GtkChromeButton. The visual effect 18 // of throbbing is created by painting partially transparent hover effects. It 19 // only works in non-gtk theme mode. This class mainly exists to glue an 20 // AnimationDelegate (C++ class) to a GtkChromeButton* (GTK/c object). 21 class HoverControllerGtk : public gfx::AnimationDelegate { 22 public: 23 virtual ~HoverControllerGtk(); 24 button()25 GtkWidget* button() { return button_; } 26 27 // Throb for |cycles| cycles. This will override the current remaining 28 // number of cycles. Note that a "cycle" is (somewhat unintuitively) half of 29 // a complete throb revolution. 30 void StartThrobbing(int cycles); 31 32 // Get the HoverControllerGtk for a given GtkChromeButton*. It is an error 33 // to call this on a widget that is not a GtkChromeButton*. 34 static HoverControllerGtk* GetHoverControllerGtk(GtkWidget* button); 35 36 // Creates a GtkChromeButton and adds a HoverControllerGtk for it. 37 static GtkWidget* CreateChromeButton(); 38 39 // Stop throbbing and delete |this|. 40 void Destroy(); 41 42 private: 43 explicit HoverControllerGtk(GtkWidget* button); 44 45 // Overridden from gfx::AnimationDelegate. 46 virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE; 47 virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE; 48 virtual void AnimationCanceled(const gfx::Animation* animation) OVERRIDE; 49 50 CHROMEGTK_CALLBACK_1(HoverControllerGtk, gboolean, OnEnter, 51 GdkEventCrossing*); 52 CHROMEGTK_CALLBACK_1(HoverControllerGtk, gboolean, OnLeave, 53 GdkEventCrossing*); 54 CHROMEGTK_CALLBACK_1(HoverControllerGtk, void, OnHierarchyChanged, 55 GtkWidget*); 56 CHROMEGTK_CALLBACK_0(HoverControllerGtk, void, OnDestroy); 57 58 gfx::ThrobAnimation throb_animation_; 59 gfx::SlideAnimation hover_animation_; 60 GtkWidget* button_; 61 62 ui::GtkSignalRegistrar signals_; 63 64 DISALLOW_COPY_AND_ASSIGN(HoverControllerGtk); 65 }; 66 67 #endif // CHROME_BROWSER_UI_GTK_HOVER_CONTROLLER_GTK_H_ 68