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