Pileus Git - ~andy/gtk/blob - gtk/gtkfilechooserembed.c

   1 /* GTK - The GIMP Toolkit
   2  * gtkfilechooserembed.h: Abstract sizing interface for file selector implementations
   3  * Copyright (C) 2004, Red Hat, Inc.
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "config.h"
  20 #include "gtkfilechooserembed.h"
  21 #include "gtkmarshalers.h"
  22 #include "gtkintl.h"
  23
  24 static void gtk_file_chooser_embed_class_init (gpointer g_iface);
  25 static void delegate_get_default_size         (GtkFileChooserEmbed *chooser_embed,
  26                                                gint                *default_width,
  27                                                gint                *default_height);
  28 static gboolean delegate_should_respond       (GtkFileChooserEmbed *chooser_embed);
  29 static void delegate_initial_focus            (GtkFileChooserEmbed *chooser_embed);
  30 static void delegate_default_size_changed     (GtkFileChooserEmbed *chooser_embed,
  31                                                gpointer             data);
  32 static void delegate_response_requested       (GtkFileChooserEmbed *chooser_embed,
  33                                                gpointer             data);
  34
  35 static GtkFileChooserEmbed *
  36 get_delegate (GtkFileChooserEmbed *receiver)
  37 {
  38   return g_object_get_data (G_OBJECT (receiver), "gtk-file-chooser-embed-delegate");
  39 }
  40
  41 /**
  42  * _gtk_file_chooser_embed_delegate_iface_init:
  43  * @iface: a #GtkFileChoserEmbedIface structure
  44  *
  45  * An interface-initialization function for use in cases where an object is
  46  * simply delegating the methods, signals of the #GtkFileChooserEmbed interface
  47  * to another object.  _gtk_file_chooser_embed_set_delegate() must be called on
  48  * each instance of the object so that the delegate object can be found.
  49  **/
  50 void
  51 _gtk_file_chooser_embed_delegate_iface_init (GtkFileChooserEmbedIface *iface)
  52 {
  53   iface->get_default_size = delegate_get_default_size;
  54   iface->should_respond = delegate_should_respond;
  55   iface->initial_focus = delegate_initial_focus;
  56 }
  57
  58 /**
  59  * _gtk_file_chooser_embed_set_delegate:
  60  * @receiver: a GOobject implementing #GtkFileChooserEmbed
  61  * @delegate: another GObject implementing #GtkFileChooserEmbed
  62  *
  63  * Establishes that calls on @receiver for #GtkFileChooser methods should be
  64  * delegated to @delegate, and that #GtkFileChooser signals emitted on @delegate
  65  * should be forwarded to @receiver. Must be used in conjunction with
  66  * _gtk_file_chooser_embed_delegate_iface_init().
  67  **/
  68 void
  69 _gtk_file_chooser_embed_set_delegate (GtkFileChooserEmbed *receiver,
  70                                       GtkFileChooserEmbed *delegate)
  71 {
  72   g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (receiver));
  73   g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (delegate));
  74
  75   g_object_set_data (G_OBJECT (receiver), I_("gtk-file-chooser-embed-delegate"), delegate);
  76
  77   g_signal_connect (delegate, "default-size-changed",
  78                     G_CALLBACK (delegate_default_size_changed), receiver);
  79   g_signal_connect (delegate, "response-requested",
  80                     G_CALLBACK (delegate_response_requested), receiver);
  81 }
  82
  83
  84
  85 static void
  86 delegate_get_default_size (GtkFileChooserEmbed *chooser_embed,
  87                            gint                *default_width,
  88                            gint                *default_height)
  89 {
  90   _gtk_file_chooser_embed_get_default_size (get_delegate (chooser_embed), default_width, default_height);
  91 }
  92
  93 static gboolean
  94 delegate_should_respond (GtkFileChooserEmbed *chooser_embed)
  95 {
  96   return _gtk_file_chooser_embed_should_respond (get_delegate (chooser_embed));
  97 }
  98
  99 static void
 100 delegate_initial_focus (GtkFileChooserEmbed *chooser_embed)
 101 {
 102   _gtk_file_chooser_embed_initial_focus (get_delegate (chooser_embed));
 103 }
 104
 105 static void
 106 delegate_default_size_changed (GtkFileChooserEmbed *chooser_embed,
 107                                gpointer             data)
 108 {
 109   g_signal_emit_by_name (data, "default-size-changed");
 110 }
 111
 112 static void
 113 delegate_response_requested (GtkFileChooserEmbed *chooser_embed,
 114                              gpointer             data)
 115 {
 116   g_signal_emit_by_name (data, "response-requested");
 117 }
 118
 119
 120 /* publicly callable functions */
 121
 122 GType
 123 _gtk_file_chooser_embed_get_type (void)
 124 {
 125   static GType file_chooser_embed_type = 0;
 126
 127   if (!file_chooser_embed_type)
 128     {
 129       const GTypeInfo file_chooser_embed_info =
 130       {
 131         sizeof (GtkFileChooserEmbedIface),  /* class_size */
 132         NULL,                          /* base_init */
 133         NULL,                          /* base_finalize */
 134         (GClassInitFunc)gtk_file_chooser_embed_class_init, /* class_init */
 135       };
 136
 137       file_chooser_embed_type = g_type_register_static (G_TYPE_INTERFACE,
 138                                                         I_("GtkFileChooserEmbed"),
 139                                                         &file_chooser_embed_info, 0);
 140
 141       g_type_interface_add_prerequisite (file_chooser_embed_type, GTK_TYPE_WIDGET);
 142     }
 143
 144   return file_chooser_embed_type;
 145 }
 146
 147 static void
 148 gtk_file_chooser_embed_class_init (gpointer g_iface)
 149 {
 150   GType iface_type = G_TYPE_FROM_INTERFACE (g_iface);
 151
 152   g_signal_new (I_("default-size-changed"),
 153                 iface_type,
 154                 G_SIGNAL_RUN_LAST,
 155                 G_STRUCT_OFFSET (GtkFileChooserEmbedIface, default_size_changed),
 156                 NULL, NULL,
 157                 _gtk_marshal_VOID__VOID,
 158                 G_TYPE_NONE, 0);
 159   g_signal_new (I_("response-requested"),
 160                 iface_type,
 161                 G_SIGNAL_RUN_LAST,
 162                 G_STRUCT_OFFSET (GtkFileChooserEmbedIface, response_requested),
 163                 NULL, NULL,
 164                 _gtk_marshal_VOID__VOID,
 165                 G_TYPE_NONE, 0);
 166 }
 167
 168 void
 169 _gtk_file_chooser_embed_get_default_size (GtkFileChooserEmbed *chooser_embed,
 170                                          gint                *default_width,
 171                                          gint                *default_height)
 172 {
 173   g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (chooser_embed));
 174   g_return_if_fail (default_width != NULL);
 175   g_return_if_fail (default_height != NULL);
 176
 177   GTK_FILE_CHOOSER_EMBED_GET_IFACE (chooser_embed)->get_default_size (chooser_embed, default_width, default_height);
 178 }
 179
 180 gboolean
 181 _gtk_file_chooser_embed_should_respond (GtkFileChooserEmbed *chooser_embed)
 182 {
 183   g_return_val_if_fail (GTK_IS_FILE_CHOOSER_EMBED (chooser_embed), FALSE);
 184
 185   return GTK_FILE_CHOOSER_EMBED_GET_IFACE (chooser_embed)->should_respond (chooser_embed);
 186 }
 187
 188 void
 189 _gtk_file_chooser_embed_initial_focus (GtkFileChooserEmbed *chooser_embed)
 190 {
 191   g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (chooser_embed));
 192
 193   GTK_FILE_CHOOSER_EMBED_GET_IFACE (chooser_embed)->initial_focus (chooser_embed);
 194 }