src/chrome/browser/ui/gtk/gtk_input_event_box.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/gtk_input_event_box.h"
   6
   7 #include <gdk/gdk.h>
   8 #include <gtk/gtk.h>
   9
  10 G_BEGIN_DECLS
  11
  12 #define GTK_INPUT_EVENT_BOX_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), \
  13                                             GTK_TYPE_INPUT_EVENT_BOX, \
  14                                             GtkInputEventBoxPrivate))
  15
  16 typedef struct _GtkInputEventBoxPrivate GtkInputEventBoxPrivate;
  17
  18 struct _GtkInputEventBoxPrivate {
  19   GdkWindow* event_window;
  20 };
  21
  22 G_DEFINE_TYPE(GtkInputEventBox, gtk_input_event_box, GTK_TYPE_BIN)
  23
  24 static void gtk_input_event_box_realize(GtkWidget* widget);
  25 static void gtk_input_event_box_unrealize(GtkWidget* widget);
  26 static void gtk_input_event_box_map(GtkWidget* widget);
  27 static void gtk_input_event_box_unmap(GtkWidget* widget);
  28 static void gtk_input_event_box_size_allocate(GtkWidget* widget,
  29                                               GtkAllocation* allocation);
  30 static void gtk_input_event_box_size_request(GtkWidget* widget,
  31                                              GtkRequisition* requisition);
  32
  33 static void gtk_input_event_box_class_init(GtkInputEventBoxClass* klass) {
  34   GtkWidgetClass* widget_class = reinterpret_cast<GtkWidgetClass*>(klass);
  35   widget_class->realize = gtk_input_event_box_realize;
  36   widget_class->unrealize = gtk_input_event_box_unrealize;
  37   widget_class->map = gtk_input_event_box_map;
  38   widget_class->unmap = gtk_input_event_box_unmap;
  39   widget_class->size_allocate = gtk_input_event_box_size_allocate;
  40   widget_class->size_request = gtk_input_event_box_size_request;
  41
  42   GObjectClass* gobject_class = G_OBJECT_CLASS(klass);
  43   g_type_class_add_private(gobject_class, sizeof(GtkInputEventBoxPrivate));
  44 }
  45
  46 static void gtk_input_event_box_init(GtkInputEventBox* widget) {
  47   GtkInputEventBoxPrivate* priv = GTK_INPUT_EVENT_BOX_GET_PRIVATE(widget);
  48   priv->event_window = NULL;
  49 }
  50
  51 GtkWidget* gtk_input_event_box_new() {
  52   return GTK_WIDGET(g_object_new(GTK_TYPE_INPUT_EVENT_BOX, NULL));
  53 }
  54
  55 static void gtk_input_event_box_realize(GtkWidget* widget) {
  56   g_return_if_fail(GTK_IS_INPUT_EVENT_BOX(widget));
  57
  58   GtkInputEventBoxPrivate* priv = GTK_INPUT_EVENT_BOX_GET_PRIVATE(widget);
  59
  60   GdkWindow* parent = gtk_widget_get_parent_window(widget);
  61   GdkWindowAttr attributes;
  62   GtkAllocation allocation;
  63   gint attributes_mask = GDK_WA_X | GDK_WA_Y;
  64
  65   gtk_widget_get_allocation(widget, &allocation);
  66
  67   attributes.x = allocation.x;
  68   attributes.y = allocation.y;
  69   attributes.width = allocation.width;
  70   attributes.height = allocation.height;
  71
  72   attributes.window_type = GDK_WINDOW_CHILD;
  73   attributes.wclass = GDK_INPUT_ONLY;
  74
  75   attributes.event_mask = gtk_widget_get_events(widget) |
  76       GDK_BUTTON_MOTION_MASK |
  77       GDK_BUTTON_PRESS_MASK |
  78       GDK_BUTTON_RELEASE_MASK |
  79       GDK_EXPOSURE_MASK |
  80       GDK_ENTER_NOTIFY_MASK |
  81       GDK_LEAVE_NOTIFY_MASK;
  82
  83   priv->event_window = gdk_window_new(parent, &attributes, attributes_mask);
  84   gdk_window_set_user_data(priv->event_window, widget);
  85
  86   GTK_WIDGET_CLASS(gtk_input_event_box_parent_class)->realize(widget);
  87 }
  88
  89 static void gtk_input_event_box_unrealize(GtkWidget* widget) {
  90   g_return_if_fail(GTK_IS_INPUT_EVENT_BOX(widget));
  91
  92   GtkInputEventBoxPrivate* priv = GTK_INPUT_EVENT_BOX_GET_PRIVATE(widget);
  93   if (priv->event_window) {
  94     gdk_window_set_user_data(priv->event_window, NULL);
  95     gdk_window_destroy(priv->event_window);
  96     priv->event_window = NULL;
  97   }
  98
  99   GTK_WIDGET_CLASS(gtk_input_event_box_parent_class)->unrealize(widget);
 100 }
 101
 102 static void gtk_input_event_box_map(GtkWidget* widget) {
 103   g_return_if_fail(GTK_IS_INPUT_EVENT_BOX(widget));
 104
 105   GtkInputEventBoxPrivate* priv = GTK_INPUT_EVENT_BOX_GET_PRIVATE(widget);
 106   if (priv->event_window)
 107     gdk_window_show(priv->event_window);
 108
 109   GTK_WIDGET_CLASS(gtk_input_event_box_parent_class)->map(widget);
 110 }
 111
 112 static void gtk_input_event_box_unmap(GtkWidget* widget) {
 113   g_return_if_fail(GTK_IS_INPUT_EVENT_BOX(widget));
 114
 115   GtkInputEventBoxPrivate* priv = GTK_INPUT_EVENT_BOX_GET_PRIVATE(widget);
 116   if (priv->event_window)
 117     gdk_window_hide(priv->event_window);
 118
 119   GTK_WIDGET_CLASS(gtk_input_event_box_parent_class)->unmap(widget);
 120 }
 121
 122 static void gtk_input_event_box_size_allocate(GtkWidget* widget,
 123                                               GtkAllocation* allocation) {
 124   g_return_if_fail(GTK_IS_INPUT_EVENT_BOX(widget));
 125
 126   gtk_widget_set_allocation(widget, allocation);
 127
 128   GtkInputEventBoxPrivate* priv = GTK_INPUT_EVENT_BOX_GET_PRIVATE(widget);
 129   if (priv->event_window) {
 130     gdk_window_move_resize(priv->event_window,
 131                            allocation->x,
 132                            allocation->y,
 133                            allocation->width,
 134                            allocation->height);
 135   }
 136
 137   GtkWidget* child = gtk_bin_get_child(GTK_BIN(widget));
 138   if (child)
 139     gtk_widget_size_allocate(child, allocation);
 140 }
 141
 142 static void gtk_input_event_box_size_request(GtkWidget* widget,
 143                                              GtkRequisition* requisition) {
 144
 145   GtkWidget* child = gtk_bin_get_child(GTK_BIN(widget));
 146   if (child)
 147     gtk_widget_size_request(child, requisition);
 148 }
 149
 150 GdkWindow* gtk_input_event_box_get_window(GtkInputEventBox* widget) {
 151   g_return_val_if_fail(GTK_IS_INPUT_EVENT_BOX(widget), NULL);
 152
 153   GtkInputEventBoxPrivate* priv = GTK_INPUT_EVENT_BOX_GET_PRIVATE(widget);
 154   return priv->event_window;
 155 }
 156
 157 G_END_DECLS