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, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include <config.h>
  22 #include "gtkfilechooserembed.h"
  23 #include "gtkmarshalers.h"
  24 #include "gtkintl.h"
  25 #include "gtkalias.h"
  26
  27 static void gtk_file_chooser_embed_class_init (gpointer g_iface);
  28 static void delegate_get_default_size         (GtkFileChooserEmbed *chooser_embed,
  29                                                gint                *default_width,
  30                                                gint                *default_height);
  31 static gboolean delegate_get_resizable        (GtkFileChooserEmbed *chooser_embed);
  32 static gboolean delegate_should_respond       (GtkFileChooserEmbed *chooser_embed);
  33 static void delegate_initial_focus            (GtkFileChooserEmbed *chooser_embed);
  34 static void delegate_default_size_changed     (GtkFileChooserEmbed *chooser_embed,
  35                                                gpointer             data);
  36 static void delegate_response_requested       (GtkFileChooserEmbed *chooser_embed,
  37                                                gpointer             data);
  38
  39 static GtkFileChooserEmbed *
  40 get_delegate (GtkFileChooserEmbed *receiver)
  41 {
  42   return g_object_get_data (G_OBJECT (receiver), "gtk-file-chooser-embed-delegate");
  43 }
  44
  45 /**
  46  * _gtk_file_chooser_embed_delegate_iface_init:
  47  * @iface: a #GtkFileChoserEmbedIface structure
  48  *
  49  * An interface-initialization function for use in cases where an object is
  50  * simply delegating the methods, signals of the #GtkFileChooserEmbed interface
  51  * to another object.  _gtk_file_chooser_embed_set_delegate() must be called on
  52  * each instance of the object so that the delegate object can be found.
  53  **/
  54 void
  55 _gtk_file_chooser_embed_delegate_iface_init (GtkFileChooserEmbedIface *iface)
  56 {
  57   iface->get_default_size = delegate_get_default_size;
  58   iface->get_resizable = delegate_get_resizable;
  59   iface->should_respond = delegate_should_respond;
  60   iface->initial_focus = delegate_initial_focus;
  61 }
  62
  63 /**
  64  * _gtk_file_chooser_embed_set_delegate:
  65  * @receiver: a GOobject implementing #GtkFileChooserEmbed
  66  * @delegate: another GObject implementing #GtkFileChooserEmbed
  67  *
  68  * Establishes that calls on @receiver for #GtkFileChooser methods should be
  69  * delegated to @delegate, and that #GtkFileChooser signals emitted on @delegate
  70  * should be forwarded to @receiver. Must be used in conjunction with
  71  * _gtk_file_chooser_embed_delegate_iface_init().
  72  **/
  73 void
  74 _gtk_file_chooser_embed_set_delegate (GtkFileChooserEmbed *receiver,
  75                                       GtkFileChooserEmbed *delegate)
  76 {
  77   g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (receiver));
  78   g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (delegate));
  79
  80   g_object_set_data (G_OBJECT (receiver), I_("gtk-file-chooser-embed-delegate"), delegate);
  81
  82   g_signal_connect (delegate, "default-size-changed",
  83                     G_CALLBACK (delegate_default_size_changed), receiver);
  84   g_signal_connect (delegate, "response-requested",
  85                     G_CALLBACK (delegate_response_requested), receiver);
  86 }
  87
  88
  89
  90 static void
  91 delegate_get_default_size (GtkFileChooserEmbed *chooser_embed,
  92                            gint                *default_width,
  93                            gint                *default_height)
  94 {
  95   _gtk_file_chooser_embed_get_default_size (get_delegate (chooser_embed), default_width, default_height);
  96 }
  97
  98 static gboolean
  99 delegate_get_resizable (GtkFileChooserEmbed *chooser_embed)
 100 {
 101   return _gtk_file_chooser_embed_get_resizable (get_delegate (chooser_embed));
 102 }
 103
 104 static gboolean
 105 delegate_should_respond (GtkFileChooserEmbed *chooser_embed)
 106 {
 107   return _gtk_file_chooser_embed_should_respond (get_delegate (chooser_embed));
 108 }
 109
 110 static void
 111 delegate_initial_focus (GtkFileChooserEmbed *chooser_embed)
 112 {
 113   _gtk_file_chooser_embed_initial_focus (get_delegate (chooser_embed));
 114 }
 115
 116 static void
 117 delegate_default_size_changed (GtkFileChooserEmbed *chooser_embed,
 118                                gpointer             data)
 119 {
 120   g_signal_emit_by_name (data, "default-size-changed");
 121 }
 122
 123 static void
 124 delegate_response_requested (GtkFileChooserEmbed *chooser_embed,
 125                              gpointer             data)
 126 {
 127   g_signal_emit_by_name (data, "response-requested");
 128 }
 129
 130
 131 /* publicly callable functions */
 132
 133 GType
 134 _gtk_file_chooser_embed_get_type (void)
 135 {
 136   static GType file_chooser_embed_type = 0;
 137
 138   if (!file_chooser_embed_type)
 139     {
 140       const GTypeInfo file_chooser_embed_info =
 141       {
 142         sizeof (GtkFileChooserEmbedIface),  /* class_size */
 143         NULL,                          /* base_init */
 144         NULL,                          /* base_finalize */
 145         (GClassInitFunc)gtk_file_chooser_embed_class_init, /* class_init */
 146       };
 147
 148       file_chooser_embed_type = g_type_register_static (G_TYPE_INTERFACE,
 149                                                         I_("GtkFileChooserEmbed"),
 150                                                         &file_chooser_embed_info, 0);
 151
 152       g_type_interface_add_prerequisite (file_chooser_embed_type, GTK_TYPE_WIDGET);
 153     }
 154
 155   return file_chooser_embed_type;
 156 }
 157
 158 static void
 159 gtk_file_chooser_embed_class_init (gpointer g_iface)
 160 {
 161   GType iface_type = G_TYPE_FROM_INTERFACE (g_iface);
 162
 163   g_signal_new (I_("default-size-changed"),
 164                 iface_type,
 165                 G_SIGNAL_RUN_LAST,
 166                 G_STRUCT_OFFSET (GtkFileChooserEmbedIface, default_size_changed),
 167                 NULL, NULL,
 168                 _gtk_marshal_VOID__VOID,
 169                 G_TYPE_NONE, 0);
 170   g_signal_new (I_("response-requested"),
 171                 iface_type,
 172                 G_SIGNAL_RUN_LAST,
 173                 G_STRUCT_OFFSET (GtkFileChooserEmbedIface, response_requested),
 174                 NULL, NULL,
 175                 _gtk_marshal_VOID__VOID,
 176                 G_TYPE_NONE, 0);
 177 }
 178
 179 void
 180 _gtk_file_chooser_embed_get_default_size (GtkFileChooserEmbed *chooser_embed,
 181                                          gint                *default_width,
 182                                          gint                *default_height)
 183 {
 184   g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (chooser_embed));
 185   g_return_if_fail (default_width != NULL);
 186   g_return_if_fail (default_height != NULL);
 187
 188   GTK_FILE_CHOOSER_EMBED_GET_IFACE (chooser_embed)->get_default_size (chooser_embed, default_width, default_height);
 189 }
 190
 191 gboolean
 192 _gtk_file_chooser_embed_should_respond (GtkFileChooserEmbed *chooser_embed)
 193 {
 194   g_return_val_if_fail (GTK_IS_FILE_CHOOSER_EMBED (chooser_embed), FALSE);
 195
 196   return GTK_FILE_CHOOSER_EMBED_GET_IFACE (chooser_embed)->should_respond (chooser_embed);
 197 }
 198
 199 void
 200 _gtk_file_chooser_embed_initial_focus (GtkFileChooserEmbed *chooser_embed)
 201 {
 202   g_return_if_fail (GTK_IS_FILE_CHOOSER_EMBED (chooser_embed));
 203
 204   GTK_FILE_CHOOSER_EMBED_GET_IFACE (chooser_embed)->initial_focus (chooser_embed);
 205 }
 206
 207 gboolean
 208 _gtk_file_chooser_embed_get_resizable (GtkFileChooserEmbed *chooser_embed)
 209 {
 210   g_return_val_if_fail (GTK_IS_FILE_CHOOSER_EMBED (chooser_embed), FALSE);
 211
 212   return GTK_FILE_CHOOSER_EMBED_GET_IFACE (chooser_embed)->get_resizable (chooser_embed);
 213 }