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

   1 /* -*- Mode: C; c-file-style: "gnu"; tab-width: 8 -*- */
   2 /* GTK - The GIMP Toolkit
   3  * gtkfilechooserdialog.c: File selector dialog
   4  * Copyright (C) 2003, Red Hat, Inc.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the
  18  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19  * Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include "config.h"
  23
  24 #include "gtkfilechooserdialog.h"
  25
  26 #include "gtkfilechooserprivate.h"
  27 #include "gtkfilechooserwidget.h"
  28 #include "gtkfilechooserutils.h"
  29 #include "gtkfilechooserembed.h"
  30 #include "gtkfilesystem.h"
  31 #include "gtksizerequest.h"
  32 #include "gtktypebuiltins.h"
  33 #include "gtkintl.h"
  34
  35 #include <stdarg.h>
  36
  37 #define GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE(o)  (GTK_FILE_CHOOSER_DIALOG (o)->priv)
  38
  39 static void gtk_file_chooser_dialog_finalize   (GObject                   *object);
  40
  41 static GObject* gtk_file_chooser_dialog_constructor  (GType                  type,
  42                                                       guint                  n_construct_properties,
  43                                                       GObjectConstructParam *construct_params);
  44 static void     gtk_file_chooser_dialog_set_property (GObject               *object,
  45                                                       guint                  prop_id,
  46                                                       const GValue          *value,
  47                                                       GParamSpec            *pspec);
  48 static void     gtk_file_chooser_dialog_get_property (GObject               *object,
  49                                                       guint                  prop_id,
  50                                                       GValue                *value,
  51                                                       GParamSpec            *pspec);
  52
  53 static void     gtk_file_chooser_dialog_map          (GtkWidget             *widget);
  54
  55 static void response_cb (GtkDialog *dialog,
  56                          gint       response_id);
  57
  58 G_DEFINE_TYPE_WITH_CODE (GtkFileChooserDialog, gtk_file_chooser_dialog, GTK_TYPE_DIALOG,
  59                          G_IMPLEMENT_INTERFACE (GTK_TYPE_FILE_CHOOSER,
  60                                                 _gtk_file_chooser_delegate_iface_init))
  61
  62 static void
  63 gtk_file_chooser_dialog_class_init (GtkFileChooserDialogClass *class)
  64 {
  65   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
  66   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
  67
  68   gobject_class->constructor = gtk_file_chooser_dialog_constructor;
  69   gobject_class->set_property = gtk_file_chooser_dialog_set_property;
  70   gobject_class->get_property = gtk_file_chooser_dialog_get_property;
  71   gobject_class->finalize = gtk_file_chooser_dialog_finalize;
  72
  73   widget_class->map       = gtk_file_chooser_dialog_map;
  74
  75   _gtk_file_chooser_install_properties (gobject_class);
  76
  77   g_type_class_add_private (class, sizeof (GtkFileChooserDialogPrivate));
  78 }
  79
  80 static void
  81 gtk_file_chooser_dialog_init (GtkFileChooserDialog *dialog)
  82 {
  83   GtkWidget *action_area, *content_area;
  84   GtkFileChooserDialogPrivate *priv = G_TYPE_INSTANCE_GET_PRIVATE (dialog,
  85                                                                    GTK_TYPE_FILE_CHOOSER_DIALOG,
  86                                                                    GtkFileChooserDialogPrivate);
  87   GtkDialog *fc_dialog = GTK_DIALOG (dialog);
  88
  89   dialog->priv = priv;
  90   dialog->priv->response_requested = FALSE;
  91
  92   content_area = gtk_dialog_get_content_area (fc_dialog);
  93   action_area = gtk_dialog_get_action_area (fc_dialog);
  94
  95   gtk_container_set_border_width (GTK_CONTAINER (fc_dialog), 5);
  96   gtk_box_set_spacing (GTK_BOX (content_area), 2); /* 2 * 5 + 2 = 12 */
  97   gtk_container_set_border_width (GTK_CONTAINER (action_area), 5);
  98
  99   /* We do a signal connection here rather than overriding the method in
 100    * class_init because GtkDialog::response is a RUN_LAST signal.  We want *our*
 101    * handler to be run *first*, regardless of whether the user installs response
 102    * handlers of his own.
 103    */
 104   g_signal_connect (dialog, "response",
 105                     G_CALLBACK (response_cb), NULL);
 106 }
 107
 108 static void
 109 gtk_file_chooser_dialog_finalize (GObject *object)
 110 {
 111   GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (object);
 112
 113   g_free (dialog->priv->file_system);
 114
 115   G_OBJECT_CLASS (gtk_file_chooser_dialog_parent_class)->finalize (object);
 116 }
 117
 118 static gboolean
 119 is_stock_accept_response_id (int response_id)
 120 {
 121   return (response_id == GTK_RESPONSE_ACCEPT
 122           || response_id == GTK_RESPONSE_OK
 123           || response_id == GTK_RESPONSE_YES
 124           || response_id == GTK_RESPONSE_APPLY);
 125 }
 126
 127 /* Callback used when the user activates a file in the file chooser widget */
 128 static void
 129 file_chooser_widget_file_activated (GtkFileChooser       *chooser,
 130                                     GtkFileChooserDialog *dialog)
 131 {
 132   GtkDialog *fc_dialog = GTK_DIALOG (dialog);
 133   GtkWidget *action_area;
 134   GList *children, *l;
 135
 136   if (gtk_window_activate_default (GTK_WINDOW (dialog)))
 137     return;
 138
 139   /* There probably isn't a default widget, so make things easier for the
 140    * programmer by looking for a reasonable button on our own.
 141    */
 142   action_area = gtk_dialog_get_action_area (fc_dialog);
 143   children = gtk_container_get_children (GTK_CONTAINER (action_area));
 144
 145   for (l = children; l; l = l->next)
 146     {
 147       GtkWidget *widget;
 148       int response_id;
 149
 150       widget = GTK_WIDGET (l->data);
 151       response_id = gtk_dialog_get_response_for_widget (fc_dialog, widget);
 152       if (gtk_widget_is_sensitive (widget) &&
 153           is_stock_accept_response_id (response_id))
 154         {
 155           gtk_widget_activate (widget); /* Should we gtk_dialog_response (dialog, response_id) instead? */
 156           break;
 157         }
 158     }
 159
 160   g_list_free (children);
 161 }
 162
 163 #if 0
 164 /* FIXME: to see why this function is ifdef-ed out, see the comment below in
 165  * file_chooser_widget_default_size_changed().
 166  */
 167 static void
 168 load_position (int *out_xpos, int *out_ypos)
 169 {
 170   GtkFileChooserSettings *settings;
 171   int x, y, width, height;
 172
 173   settings = _gtk_file_chooser_settings_new ();
 174   _gtk_file_chooser_settings_get_geometry (settings, &x, &y, &width, &height);
 175   g_object_unref (settings);
 176
 177   *out_xpos = x;
 178   *out_ypos = y;
 179 }
 180 #endif
 181
 182 static void
 183 file_chooser_widget_default_size_changed (GtkWidget            *widget,
 184                                           GtkFileChooserDialog *dialog)
 185 {
 186   GtkFileChooserDialogPrivate *priv;
 187   gint default_width, default_height;
 188   GtkRequisition req, widget_req;
 189
 190   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 191
 192   /* Unset any previously set size */
 193   gtk_widget_set_size_request (GTK_WIDGET (dialog), -1, -1);
 194
 195   if (gtk_widget_is_drawable (widget))
 196     {
 197       /* Force a size request of everything before we start.  This will make sure
 198        * that widget->requisition is meaningful. */
 199       gtk_widget_get_preferred_size (GTK_WIDGET (dialog),
 200                                      &req, NULL);
 201       gtk_widget_get_preferred_size (widget,
 202                                      &widget_req, NULL);
 203     }
 204
 205   _gtk_file_chooser_embed_get_default_size (GTK_FILE_CHOOSER_EMBED (priv->widget),
 206                                             &default_width, &default_height);
 207
 208   gtk_window_resize (GTK_WINDOW (dialog), default_width, default_height);
 209
 210   if (!gtk_widget_get_mapped (GTK_WIDGET (dialog)))
 211     {
 212 #if 0
 213       /* FIXME: the code to restore the position does not work yet.  It is not
 214        * clear whether it is actually desirable --- if enabled, applications
 215        * would not be able to say "center the file chooser on top of my toplevel
 216        * window".  So, we don't use this code at all.
 217        */
 218       load_position (&xpos, &ypos);
 219       if (xpos >= 0 && ypos >= 0)
 220         {
 221           gtk_window_set_position (GTK_WINDOW (dialog), GTK_WIN_POS_NONE);
 222           gtk_window_move (GTK_WINDOW (dialog), xpos, ypos);
 223         }
 224 #endif
 225     }
 226 }
 227
 228 static void
 229 file_chooser_widget_response_requested (GtkWidget            *widget,
 230                                         GtkFileChooserDialog *dialog)
 231 {
 232   GtkDialog *fc_dialog = GTK_DIALOG (dialog);
 233   GtkWidget *action_area;
 234   GList *children, *l;
 235
 236   dialog->priv->response_requested = TRUE;
 237
 238   if (gtk_window_activate_default (GTK_WINDOW (dialog)))
 239     return;
 240
 241   /* There probably isn't a default widget, so make things easier for the
 242    * programmer by looking for a reasonable button on our own.
 243    */
 244   action_area = gtk_dialog_get_action_area (fc_dialog);
 245   children = gtk_container_get_children (GTK_CONTAINER (action_area));
 246
 247   for (l = children; l; l = l->next)
 248     {
 249       GtkWidget *widget;
 250       int response_id;
 251
 252       widget = GTK_WIDGET (l->data);
 253       response_id = gtk_dialog_get_response_for_widget (fc_dialog, widget);
 254       if (gtk_widget_is_sensitive (widget) &&
 255           is_stock_accept_response_id (response_id))
 256         {
 257           gtk_widget_activate (widget); /* Should we gtk_dialog_response (dialog, response_id) instead? */
 258           break;
 259         }
 260     }
 261
 262   if (l == NULL)
 263     dialog->priv->response_requested = FALSE;
 264
 265   g_list_free (children);
 266 }
 267
 268 static GObject*
 269 gtk_file_chooser_dialog_constructor (GType                  type,
 270                                      guint                  n_construct_properties,
 271                                      GObjectConstructParam *construct_params)
 272 {
 273   GtkFileChooserDialogPrivate *priv;
 274   GtkWidget *content_area;
 275   GObject *object;
 276
 277   object = G_OBJECT_CLASS (gtk_file_chooser_dialog_parent_class)->constructor (type,
 278                                                                                n_construct_properties,
 279                                                                                construct_params);
 280   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
 281
 282   gtk_widget_push_composite_child ();
 283
 284   if (priv->file_system)
 285     priv->widget = g_object_new (GTK_TYPE_FILE_CHOOSER_WIDGET,
 286                                  NULL);
 287   else
 288     priv->widget = g_object_new (GTK_TYPE_FILE_CHOOSER_WIDGET, NULL);
 289
 290   g_signal_connect (priv->widget, "file-activated",
 291                     G_CALLBACK (file_chooser_widget_file_activated), object);
 292   g_signal_connect (priv->widget, "default-size-changed",
 293                     G_CALLBACK (file_chooser_widget_default_size_changed), object);
 294   g_signal_connect (priv->widget, "response-requested",
 295                     G_CALLBACK (file_chooser_widget_response_requested), object);
 296
 297   content_area = gtk_dialog_get_content_area (GTK_DIALOG (object));
 298
 299   gtk_container_set_border_width (GTK_CONTAINER (priv->widget), 5);
 300   gtk_box_pack_start (GTK_BOX (content_area), priv->widget, TRUE, TRUE, 0);
 301
 302   gtk_widget_show (priv->widget);
 303
 304   _gtk_file_chooser_set_delegate (GTK_FILE_CHOOSER (object),
 305                                   GTK_FILE_CHOOSER (priv->widget));
 306
 307   gtk_widget_pop_composite_child ();
 308
 309   return object;
 310 }
 311
 312 static void
 313 gtk_file_chooser_dialog_set_property (GObject         *object,
 314                                       guint            prop_id,
 315                                       const GValue    *value,
 316                                       GParamSpec      *pspec)
 317
 318 {
 319   GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
 320
 321   switch (prop_id)
 322     {
 323     default:
 324       g_object_set_property (G_OBJECT (priv->widget), pspec->name, value);
 325       break;
 326     }
 327 }
 328
 329 static void
 330 gtk_file_chooser_dialog_get_property (GObject         *object,
 331                                       guint            prop_id,
 332                                       GValue          *value,
 333                                       GParamSpec      *pspec)
 334 {
 335   GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
 336
 337   g_object_get_property (G_OBJECT (priv->widget), pspec->name, value);
 338 }
 339
 340 static void
 341 foreach_ensure_default_response_cb (GtkWidget *widget,
 342                                     gpointer   data)
 343 {
 344   GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (data);
 345   int response_id;
 346
 347   response_id = gtk_dialog_get_response_for_widget (GTK_DIALOG (dialog), widget);
 348   if (is_stock_accept_response_id (response_id))
 349     gtk_dialog_set_default_response (GTK_DIALOG (dialog), response_id);
 350 }
 351
 352 static void
 353 ensure_default_response (GtkFileChooserDialog *dialog)
 354 {
 355   GtkWidget *action_area;
 356
 357   action_area = gtk_dialog_get_action_area (GTK_DIALOG (dialog));
 358   gtk_container_foreach (GTK_CONTAINER (action_area),
 359                          foreach_ensure_default_response_cb,
 360                          dialog);
 361 }
 362
 363 /* GtkWidget::map handler */
 364 static void
 365 gtk_file_chooser_dialog_map (GtkWidget *widget)
 366 {
 367   GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (widget);
 368   GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 369
 370   ensure_default_response (dialog);
 371
 372   _gtk_file_chooser_embed_initial_focus (GTK_FILE_CHOOSER_EMBED (priv->widget));
 373
 374   GTK_WIDGET_CLASS (gtk_file_chooser_dialog_parent_class)->map (widget);
 375 }
 376
 377 /* GtkDialog::response handler */
 378 static void
 379 response_cb (GtkDialog *dialog,
 380              gint       response_id)
 381 {
 382   GtkFileChooserDialogPrivate *priv;
 383
 384   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 385
 386   /* Act only on response IDs we recognize */
 387   if (is_stock_accept_response_id (response_id)
 388       && !priv->response_requested
 389       && !_gtk_file_chooser_embed_should_respond (GTK_FILE_CHOOSER_EMBED (priv->widget)))
 390     {
 391       g_signal_stop_emission_by_name (dialog, "response");
 392     }
 393
 394   priv->response_requested = FALSE;
 395 }
 396
 397 static GtkWidget *
 398 gtk_file_chooser_dialog_new_valist (const gchar          *title,
 399                                     GtkWindow            *parent,
 400                                     GtkFileChooserAction  action,
 401                                     const gchar          *first_button_text,
 402                                     va_list               varargs)
 403 {
 404   GtkWidget *result;
 405   const char *button_text = first_button_text;
 406   gint response_id;
 407
 408   result = g_object_new (GTK_TYPE_FILE_CHOOSER_DIALOG,
 409                          "title", title,
 410                          "action", action,
 411                          NULL);
 412
 413   if (parent)
 414     gtk_window_set_transient_for (GTK_WINDOW (result), parent);
 415
 416   while (button_text)
 417     {
 418       response_id = va_arg (varargs, gint);
 419       gtk_dialog_add_button (GTK_DIALOG (result), button_text, response_id);
 420       button_text = va_arg (varargs, const gchar *);
 421     }
 422
 423   return result;
 424 }
 425
 426 /**
 427  * gtk_file_chooser_dialog_new:
 428  * @title: (allow-none): Title of the dialog, or %NULL
 429  * @parent: (allow-none): Transient parent of the dialog, or %NULL
 430  * @action: Open or save mode for the dialog
 431  * @first_button_text: (allow-none): stock ID or text to go in the first button, or %NULL
 432  * @Varargs: response ID for the first button, then additional (button, id) pairs, ending with %NULL
 433  *
 434  * Creates a new #GtkFileChooserDialog.  This function is analogous to
 435  * gtk_dialog_new_with_buttons().
 436  *
 437  * Return value: a new #GtkFileChooserDialog
 438  *
 439  * Since: 2.4
 440  **/
 441 GtkWidget *
 442 gtk_file_chooser_dialog_new (const gchar         *title,
 443                              GtkWindow           *parent,
 444                              GtkFileChooserAction action,
 445                              const gchar         *first_button_text,
 446                              ...)
 447 {
 448   GtkWidget *result;
 449   va_list varargs;
 450
 451   va_start (varargs, first_button_text);
 452   result = gtk_file_chooser_dialog_new_valist (title, parent, action,
 453                                                first_button_text,
 454                                                varargs);
 455   va_end (varargs);
 456
 457   return result;
 458 }