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#include "chrome/browser/ui/gtk/hover_controller_gtk.h"
6
7#include "base/message_loop.h"
8#include "chrome/browser/ui/gtk/gtk_chrome_button.h"
9
10static const gchar* kHoverControllerGtkKey = "__HOVER_CONTROLLER_GTK__";
11
12HoverControllerGtk::HoverControllerGtk(GtkWidget* button)
13    : throb_animation_(this),
14      hover_animation_(this),
15      button_(button) {
16  g_object_ref(button_);
17  gtk_chrome_button_set_hover_state(GTK_CHROME_BUTTON(button_), 0);
18
19  signals_.Connect(button_, "enter-notify-event",
20                   G_CALLBACK(OnEnterThunk), this);
21  signals_.Connect(button_, "leave-notify-event",
22                   G_CALLBACK(OnLeaveThunk), this);
23  signals_.Connect(button_, "destroy",
24                   G_CALLBACK(OnDestroyThunk), this);
25  signals_.Connect(button_, "hierarchy-changed",
26                   G_CALLBACK(OnHierarchyChangedThunk), this);
27
28#ifndef NDEBUG
29  if (g_object_get_data(G_OBJECT(button_), kHoverControllerGtkKey))
30    NOTREACHED();
31#endif  // !NDEBUG
32
33  g_object_set_data(G_OBJECT(button), kHoverControllerGtkKey, this);
34}
35
36HoverControllerGtk::~HoverControllerGtk() {
37}
38
39void HoverControllerGtk::StartThrobbing(int cycles) {
40  throb_animation_.StartThrobbing(cycles);
41}
42
43// static
44GtkWidget* HoverControllerGtk::CreateChromeButton() {
45  GtkWidget* widget = gtk_chrome_button_new();
46  new HoverControllerGtk(widget);
47  return widget;
48}
49
50// static
51HoverControllerGtk* HoverControllerGtk::GetHoverControllerGtk(
52    GtkWidget* button) {
53  return reinterpret_cast<HoverControllerGtk*>(
54      g_object_get_data(G_OBJECT(button), kHoverControllerGtkKey));
55}
56
57void HoverControllerGtk::Destroy() {
58  gtk_chrome_button_set_hover_state(GTK_CHROME_BUTTON(button_), -1.0);
59
60  g_object_set_data(G_OBJECT(button_), kHoverControllerGtkKey, NULL);
61  g_object_unref(button_);
62  button_ = NULL;
63
64  delete this;
65}
66
67void HoverControllerGtk::AnimationProgressed(const ui::Animation* animation) {
68  if (!button_)
69    return;
70
71  // Ignore the hover animation if we are throbbing.
72  if (animation == &hover_animation_ && throb_animation_.is_animating())
73    return;
74
75  gtk_chrome_button_set_hover_state(GTK_CHROME_BUTTON(button_),
76                                    animation->GetCurrentValue());
77}
78
79void HoverControllerGtk::AnimationEnded(const ui::Animation* animation) {
80  if (!button_)
81    return;
82  if (animation != &throb_animation_)
83    return;
84
85  if (throb_animation_.cycles_remaining() <= 1)
86    gtk_chrome_button_set_hover_state(GTK_CHROME_BUTTON(button_), 0);
87}
88
89void HoverControllerGtk::AnimationCanceled(const ui::Animation* animation) {
90  AnimationEnded(animation);
91}
92
93gboolean HoverControllerGtk::OnEnter(GtkWidget* widget,
94                                     GdkEventCrossing* event) {
95  hover_animation_.Show();
96
97  return FALSE;
98}
99
100gboolean HoverControllerGtk::OnLeave(GtkWidget* widget,
101                                     GdkEventCrossing* event) {
102  // When the user is holding a mouse button, we don't want to animate.
103  if (event->state & (GDK_BUTTON1_MASK | GDK_BUTTON2_MASK | GDK_BUTTON3_MASK)) {
104    hover_animation_.Reset();
105    gtk_chrome_button_set_hover_state(GTK_CHROME_BUTTON(button_), 0);
106  } else {
107    hover_animation_.Hide();
108  }
109
110  return FALSE;
111}
112
113void HoverControllerGtk::OnHierarchyChanged(GtkWidget* widget,
114                                            GtkWidget* previous_toplevel) {
115  // GTK+ does not emit leave-notify-event signals when a widget
116  // becomes unanchored, so manually unset the hover states.
117  if (!GTK_WIDGET_TOPLEVEL(gtk_widget_get_toplevel(widget))) {
118    gtk_widget_set_state(button_, GTK_STATE_NORMAL);
119    hover_animation_.Reset();
120    gtk_chrome_button_set_hover_state(GTK_CHROME_BUTTON(button_), 0.0);
121  }
122}
123
124void HoverControllerGtk::OnDestroy(GtkWidget* widget) {
125  Destroy();
126}
127