src/chrome/browser/ui/gtk/hover_controller_gtk.cc

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