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
10 static const gchar* kHoverControllerGtkKey = "__HOVER_CONTROLLER_GTK__";
11
HoverControllerGtk(GtkWidget * button)12 HoverControllerGtk::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
~HoverControllerGtk()36 HoverControllerGtk::~HoverControllerGtk() {
37 }
38
StartThrobbing(int cycles)39 void HoverControllerGtk::StartThrobbing(int cycles) {
40 throb_animation_.StartThrobbing(cycles);
41 }
42
43 // static
CreateChromeButton()44 GtkWidget* HoverControllerGtk::CreateChromeButton() {
45 GtkWidget* widget = gtk_chrome_button_new();
46 new HoverControllerGtk(widget);
47 return widget;
48 }
49
50 // static
GetHoverControllerGtk(GtkWidget * button)51 HoverControllerGtk* HoverControllerGtk::GetHoverControllerGtk(
52 GtkWidget* button) {
53 return reinterpret_cast<HoverControllerGtk*>(
54 g_object_get_data(G_OBJECT(button), kHoverControllerGtkKey));
55 }
56
Destroy()57 void 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
AnimationProgressed(const ui::Animation * animation)67 void 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
AnimationEnded(const ui::Animation * animation)79 void 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
AnimationCanceled(const ui::Animation * animation)89 void HoverControllerGtk::AnimationCanceled(const ui::Animation* animation) {
90 AnimationEnded(animation);
91 }
92
OnEnter(GtkWidget * widget,GdkEventCrossing * event)93 gboolean HoverControllerGtk::OnEnter(GtkWidget* widget,
94 GdkEventCrossing* event) {
95 hover_animation_.Show();
96
97 return FALSE;
98 }
99
OnLeave(GtkWidget * widget,GdkEventCrossing * event)100 gboolean 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
OnHierarchyChanged(GtkWidget * widget,GtkWidget * previous_toplevel)113 void 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
OnDestroy(GtkWidget * widget)124 void HoverControllerGtk::OnDestroy(GtkWidget* widget) {
125 Destroy();
126 }
127