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