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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 CHROME_BROWSER_UI_GTK_HOVER_CONTROLLER_GTK_H_
#define CHROME_BROWSER_UI_GTK_HOVER_CONTROLLER_GTK_H_
#include <gtk/gtk.h>
#include "base/compiler_specific.h"
#include "ui/base/animation/animation_delegate.h"
#include "ui/base/animation/slide_animation.h"
#include "ui/base/animation/throb_animation.h"
#include "ui/base/gtk/gtk_signal.h"
#include "ui/base/gtk/gtk_signal_registrar.h"
// This class handles the "throbbing" of a GtkChromeButton. The visual effect
// of throbbing is created by painting partially transparent hover effects. It
// only works in non-gtk theme mode. This class mainly exists to glue an
// AnimationDelegate (C++ class) to a GtkChromeButton* (GTK/c object).
class HoverControllerGtk : public ui::AnimationDelegate {
public:
virtual ~HoverControllerGtk();
GtkWidget* button() { return button_; }
// Throb for |cycles| cycles. This will override the current remaining
// number of cycles. Note that a "cycle" is (somewhat unintuitively) half of
// a complete throb revolution.
void StartThrobbing(int cycles);
// Get the HoverControllerGtk for a given GtkChromeButton*. It is an error
// to call this on a widget that is not a GtkChromeButton*.
static HoverControllerGtk* GetHoverControllerGtk(GtkWidget* button);
// Creates a GtkChromeButton and adds a HoverControllerGtk for it.
static GtkWidget* CreateChromeButton();
// Stop throbbing and delete |this|.
void Destroy();
private:
explicit HoverControllerGtk(GtkWidget* button);
// Overridden from ui::AnimationDelegate.
virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
virtual void AnimationCanceled(const ui::Animation* animation) OVERRIDE;
CHROMEGTK_CALLBACK_1(HoverControllerGtk, gboolean, OnEnter,
GdkEventCrossing*);
CHROMEGTK_CALLBACK_1(HoverControllerGtk, gboolean, OnLeave,
GdkEventCrossing*);
CHROMEGTK_CALLBACK_1(HoverControllerGtk, void, OnHierarchyChanged,
GtkWidget*);
CHROMEGTK_CALLBACK_0(HoverControllerGtk, void, OnDestroy);
ui::ThrobAnimation throb_animation_;
ui::SlideAnimation hover_animation_;
GtkWidget* button_;
ui::GtkSignalRegistrar signals_;
DISALLOW_COPY_AND_ASSIGN(HoverControllerGtk);
};
#endif // CHROME_BROWSER_UI_GTK_HOVER_CONTROLLER_GTK_H_
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