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

   1 /* GTK - The GIMP Toolkit
   2  * gtkfilechooserdialog.c: File selector dialog
   3  * Copyright (C) 2003, 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 "gtkfilechooserdialog.h"
  22 #include "gtkfilechooserwidget.h"
  23 #include "gtkfilechooserutils.h"
  24 #include "gtkfilechooserembed.h"
  25 #include "gtkfilesystem.h"
  26 #include "gtktypebuiltins.h"
  27
  28 #include <stdarg.h>
  29
  30 struct _GtkFileChooserDialogPrivate
  31 {
  32   GtkWidget *widget;
  33
  34   char *file_system;
  35
  36   /* for use with GtkFileChooserEmbed */
  37   gint default_width;
  38   gint default_height;
  39   gboolean resize_horizontally;
  40   gboolean resize_vertically;
  41 };
  42
  43 #define GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE(o)  (GTK_FILE_CHOOSER_DIALOG (o)->priv)
  44
  45 static void gtk_file_chooser_dialog_class_init (GtkFileChooserDialogClass *class);
  46 static void gtk_file_chooser_dialog_init       (GtkFileChooserDialog      *dialog);
  47 static void gtk_file_chooser_dialog_finalize   (GObject                   *object);
  48
  49 static GObject* gtk_file_chooser_dialog_constructor  (GType                  type,
  50                                                       guint                  n_construct_properties,
  51                                                       GObjectConstructParam *construct_params);
  52 static void     gtk_file_chooser_dialog_set_property (GObject               *object,
  53                                                       guint                  prop_id,
  54                                                       const GValue          *value,
  55                                                       GParamSpec            *pspec);
  56 static void     gtk_file_chooser_dialog_get_property (GObject               *object,
  57                                                       guint                  prop_id,
  58                                                       GValue                *value,
  59                                                       GParamSpec            *pspec);
  60
  61 static void     gtk_file_chooser_dialog_style_set    (GtkWidget             *widget,
  62                                                       GtkStyle              *previous_style);
  63
  64 static void response_cb (GtkDialog *dialog,
  65                          gint       response_id);
  66
  67 static GObjectClass *parent_class;
  68
  69 GType
  70 gtk_file_chooser_dialog_get_type (void)
  71 {
  72   static GType file_chooser_dialog_type = 0;
  73
  74   if (!file_chooser_dialog_type)
  75     {
  76       static const GTypeInfo file_chooser_dialog_info =
  77       {
  78         sizeof (GtkFileChooserDialogClass),
  79         NULL,           /* base_init */
  80         NULL,           /* base_finalize */
  81         (GClassInitFunc) gtk_file_chooser_dialog_class_init,
  82         NULL,           /* class_finalize */
  83         NULL,           /* class_data */
  84         sizeof (GtkFileChooserDialog),
  85         0,              /* n_preallocs */
  86         (GInstanceInitFunc) gtk_file_chooser_dialog_init,
  87       };
  88
  89       static const GInterfaceInfo file_chooser_info =
  90       {
  91         (GInterfaceInitFunc) _gtk_file_chooser_delegate_iface_init, /* interface_init */
  92         NULL,                                                       /* interface_finalize */
  93         NULL                                                        /* interface_data */
  94       };
  95
  96       file_chooser_dialog_type = g_type_register_static (GTK_TYPE_DIALOG, "GtkFileChooserDialog",
  97                                                          &file_chooser_dialog_info, 0);
  98       g_type_add_interface_static (file_chooser_dialog_type,
  99                                    GTK_TYPE_FILE_CHOOSER,
 100                                    &file_chooser_info);
 101     }
 102
 103   return file_chooser_dialog_type;
 104 }
 105
 106 static void
 107 gtk_file_chooser_dialog_class_init (GtkFileChooserDialogClass *class)
 108 {
 109   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 110   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 111
 112   parent_class = g_type_class_peek_parent (class);
 113
 114   gobject_class->constructor = gtk_file_chooser_dialog_constructor;
 115   gobject_class->set_property = gtk_file_chooser_dialog_set_property;
 116   gobject_class->get_property = gtk_file_chooser_dialog_get_property;
 117   gobject_class->finalize = gtk_file_chooser_dialog_finalize;
 118
 119   widget_class->style_set = gtk_file_chooser_dialog_style_set;
 120
 121   _gtk_file_chooser_install_properties (gobject_class);
 122
 123   g_type_class_add_private (class, sizeof (GtkFileChooserDialogPrivate));
 124 }
 125
 126 static void
 127 gtk_file_chooser_dialog_init (GtkFileChooserDialog *dialog)
 128 {
 129   GtkFileChooserDialogPrivate *priv = G_TYPE_INSTANCE_GET_PRIVATE (dialog,
 130                                                                    GTK_TYPE_FILE_CHOOSER_DIALOG,
 131                                                                    GtkFileChooserDialogPrivate);
 132   dialog->priv = priv;
 133   dialog->priv->default_width = -1;
 134   dialog->priv->default_height = -1;
 135   dialog->priv->resize_horizontally = TRUE;
 136   dialog->priv->resize_vertically = TRUE;
 137
 138   gtk_dialog_set_has_separator (GTK_DIALOG (dialog), FALSE);
 139
 140   /* We do a signal connection here rather than overriding the method in
 141    * class_init because GtkDialog::response is a RUN_LAST signal.  We want *our*
 142    * handler to be run *first*, regardless of whether the user installs response
 143    * handlers of his own.
 144    */
 145   g_signal_connect (dialog, "response",
 146                     G_CALLBACK (response_cb), NULL);
 147 }
 148
 149 static void
 150 gtk_file_chooser_dialog_finalize (GObject *object)
 151 {
 152   GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (object);
 153
 154   g_free (dialog->priv->file_system);
 155
 156   G_OBJECT_CLASS (parent_class)->finalize (object);
 157 }
 158
 159 /* Callback used when the user activates a file in the file chooser widget */
 160 static void
 161 file_chooser_widget_file_activated (GtkFileChooser       *chooser,
 162                                     GtkFileChooserDialog *dialog)
 163 {
 164   gtk_window_activate_default (GTK_WINDOW (dialog));
 165 }
 166
 167 static void
 168 file_chooser_widget_update_hints (GtkFileChooserDialog *dialog)
 169 {
 170   GtkFileChooserDialogPrivate *priv;
 171   GdkGeometry geometry;
 172
 173   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 174
 175   geometry.min_width = -1;
 176   geometry.min_height = -1;
 177   geometry.max_width = (priv->resize_horizontally?G_MAXSHORT:-1);
 178   geometry.max_height = (priv->resize_vertically?G_MAXSHORT:-1);
 179
 180   gtk_window_set_geometry_hints (GTK_WINDOW (dialog), NULL,
 181                                  &geometry,
 182                                  GDK_HINT_MIN_SIZE | GDK_HINT_MAX_SIZE);
 183 }
 184
 185 static void
 186 file_chooser_widget_default_realized_size_changed (GtkWidget            *widget,
 187                                                    GtkFileChooserDialog *dialog)
 188 {
 189   GtkFileChooserDialogPrivate *priv;
 190   gint width;
 191   gint height;
 192   gint default_width, default_height;
 193   GtkRequisition req;
 194   gboolean resize_horizontally;
 195   gboolean resize_vertically;
 196   gboolean update_hints;
 197   gint dx = 0, dy = 0;
 198   gint cur_width, cur_height;
 199
 200   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 201
 202   /* Force a size request of everything before we start.  This will make sure
 203    * that widget->requisition is meaningful. */
 204   gtk_widget_size_request (GTK_WIDGET (dialog), &req);
 205   gtk_window_get_size (GTK_WINDOW (dialog), &cur_width, &cur_height);
 206   width = GTK_WIDGET (dialog)->requisition.width - priv->widget->requisition.width;
 207   height = GTK_WIDGET (dialog)->requisition.height - priv->widget->requisition.height;
 208   _gtk_file_chooser_embed_get_default_size (GTK_FILE_CHOOSER_EMBED (priv->widget),
 209                                             &default_width, &default_height);
 210
 211   /* Ideal target size modulo any resizing */
 212   width = default_width + width;
 213   height = default_height + height;
 214
 215   /* Now, we test for resizability */
 216   update_hints = FALSE;
 217   _gtk_file_chooser_embed_get_resizable_hints (GTK_FILE_CHOOSER_EMBED (priv->widget),
 218                                                &resize_horizontally,
 219                                                &resize_vertically);
 220   resize_vertically = (!! resize_vertically);     /* normalize */
 221   resize_horizontally = (!! resize_horizontally);
 222
 223   if (resize_horizontally && priv->resize_horizontally)
 224     {
 225       dx = default_width - priv->default_width;
 226       priv->default_width = default_width;
 227     }
 228   else if (resize_horizontally && ! priv->resize_horizontally)
 229     {
 230       /* We restore to the ideal size + any change in default_size (which is not
 231        * expected).  It would be nicer to store the older size to restore to in
 232        * the future. */
 233       dx = default_width - priv->default_width;
 234       dx += width - cur_width;
 235       priv->default_width = default_width;
 236       update_hints = TRUE;
 237     }
 238   else
 239     {
 240       update_hints = TRUE;
 241     }
 242
 243   if (resize_vertically && priv->resize_vertically)
 244     {
 245       dy = default_height - priv->default_height;
 246       priv->default_height = default_height;
 247     }
 248   else if (resize_vertically && ! priv->resize_vertically)
 249     {
 250       dy = default_height - priv->default_height;
 251       dy += height - cur_height;
 252       priv->default_height = default_height;
 253       update_hints = TRUE;
 254     }
 255   else
 256     {
 257       update_hints = TRUE;
 258     }
 259
 260   priv->resize_horizontally = resize_horizontally;
 261   priv->resize_vertically = resize_vertically;
 262
 263   /* FIXME: We should make sure that we arent' bigger than the current screen */
 264   if (dx != 0 || dy != 0)
 265     {
 266       gtk_window_resize (GTK_WINDOW (dialog),
 267                          cur_width + dx,
 268                          cur_height + dy);
 269     }
 270
 271   /* Only store the size if we can resize in that direction. */
 272   if (update_hints)
 273     file_chooser_widget_update_hints (dialog);
 274 }
 275
 276 static void
 277 file_chooser_widget_default_unrealized_size_changed (GtkWidget            *widget,
 278                                                      GtkFileChooserDialog *dialog)
 279 {
 280   GtkFileChooserDialogPrivate *priv;
 281   GtkRequisition req;
 282   gint width, height;
 283
 284   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 285   gtk_widget_size_request (GTK_WIDGET (dialog), &req);
 286
 287   _gtk_file_chooser_embed_get_resizable_hints (GTK_FILE_CHOOSER_EMBED (priv->widget),
 288                                                &(priv->resize_horizontally),
 289                                                &(priv->resize_vertically));
 290   _gtk_file_chooser_embed_get_default_size (GTK_FILE_CHOOSER_EMBED (priv->widget),
 291                                             &(priv->default_width), &(priv->default_height));
 292
 293   /* Determine how much space the rest of the dialog uses compared to priv->widget */
 294   width = priv->default_width + GTK_WIDGET (dialog)->requisition.width - priv->widget->requisition.width;
 295   height = priv->default_height + GTK_WIDGET (dialog)->requisition.height - priv->widget->requisition.height;
 296
 297   gtk_window_set_default_size (GTK_WINDOW (dialog), width, height);
 298   file_chooser_widget_update_hints (dialog);
 299 }
 300
 301 static void
 302 file_chooser_widget_default_size_changed (GtkWidget            *widget,
 303                                           GtkFileChooserDialog *dialog)
 304 {
 305   if (GTK_WIDGET_REALIZED (dialog))
 306     file_chooser_widget_default_realized_size_changed (widget, dialog);
 307   else
 308     file_chooser_widget_default_unrealized_size_changed (widget, dialog);
 309 }
 310
 311 static GObject*
 312 gtk_file_chooser_dialog_constructor (GType                  type,
 313                                      guint                  n_construct_properties,
 314                                      GObjectConstructParam *construct_params)
 315 {
 316   GtkFileChooserDialogPrivate *priv;
 317   GObject *object;
 318
 319   object = parent_class->constructor (type,
 320                                       n_construct_properties,
 321                                       construct_params);
 322   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
 323
 324   gtk_widget_push_composite_child ();
 325
 326   if (priv->file_system)
 327     priv->widget = g_object_new (GTK_TYPE_FILE_CHOOSER_WIDGET,
 328                                  "file-system-backend", priv->file_system,
 329                                  NULL);
 330   else
 331     priv->widget = g_object_new (GTK_TYPE_FILE_CHOOSER_WIDGET, NULL);
 332
 333   g_signal_connect (priv->widget, "file-activated",
 334                     G_CALLBACK (file_chooser_widget_file_activated), object);
 335   g_signal_connect (priv->widget, "default-size-changed",
 336                     G_CALLBACK (file_chooser_widget_default_size_changed), object);
 337
 338   gtk_box_pack_start (GTK_BOX (GTK_DIALOG (object)->vbox), priv->widget, TRUE, TRUE, 0);
 339   gtk_widget_show (priv->widget);
 340
 341   _gtk_file_chooser_set_delegate (GTK_FILE_CHOOSER (object),
 342                                   GTK_FILE_CHOOSER (priv->widget));
 343
 344   gtk_widget_pop_composite_child ();
 345
 346   return object;
 347 }
 348
 349 static void
 350 gtk_file_chooser_dialog_set_property (GObject         *object,
 351                                       guint            prop_id,
 352                                       const GValue    *value,
 353                                       GParamSpec      *pspec)
 354
 355 {
 356   GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
 357
 358   switch (prop_id)
 359     {
 360     case GTK_FILE_CHOOSER_PROP_FILE_SYSTEM_BACKEND:
 361       g_free (priv->file_system);
 362       priv->file_system = g_value_dup_string (value);
 363       break;
 364     default:
 365       g_object_set_property (G_OBJECT (priv->widget), pspec->name, value);
 366       break;
 367     }
 368 }
 369
 370 static void
 371 gtk_file_chooser_dialog_get_property (GObject         *object,
 372                                       guint            prop_id,
 373                                       GValue          *value,
 374                                       GParamSpec      *pspec)
 375 {
 376   GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
 377
 378   g_object_get_property (G_OBJECT (priv->widget), pspec->name, value);
 379 }
 380
 381 #if 0
 382 static void
 383 set_default_size (GtkFileChooserDialog *dialog)
 384 {
 385   GtkWidget *widget;
 386   GtkWindow *window;
 387   int default_width, default_height;
 388   int width, height;
 389   int font_size;
 390   GdkScreen *screen;
 391   int monitor_num;
 392   GtkRequisition req;
 393   GdkRectangle monitor;
 394
 395   widget = GTK_WIDGET (dialog);
 396   window = GTK_WINDOW (dialog);
 397
 398   /* Size based on characters */
 399
 400   font_size = pango_font_description_get_size (widget->style->font_desc);
 401   font_size = PANGO_PIXELS (font_size);
 402
 403   width = font_size * NUM_CHARS;
 404   height = font_size * NUM_LINES;
 405
 406   /* Use at least the requisition size... */
 407
 408   gtk_widget_size_request (widget, &req);
 409   width = MAX (width, req.width);
 410   height = MAX (height, req.height);
 411
 412   /* ... but no larger than the monitor */
 413
 414   screen = gtk_widget_get_screen (widget);
 415   monitor_num = gdk_screen_get_monitor_at_window (screen, widget->window);
 416
 417   gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
 418
 419   width = MIN (width, monitor.width * 3 / 4);
 420   height = MIN (height, monitor.height * 3 / 4);
 421
 422   /* Set size */
 423
 424   gtk_window_get_default_size (window, &default_width, &default_height);
 425
 426   gtk_window_set_default_size (window,
 427                                (default_width == -1) ? width : default_width,
 428                                (default_height == -1) ? height : default_height);
 429 }
 430 #endif
 431
 432 static void
 433 gtk_file_chooser_dialog_style_set (GtkWidget *widget,
 434                                    GtkStyle  *previous_style)
 435 {
 436   GtkDialog *dialog;
 437
 438   if (GTK_WIDGET_CLASS (parent_class)->style_set)
 439     GTK_WIDGET_CLASS (parent_class)->style_set (widget, previous_style);
 440
 441   dialog = GTK_DIALOG (widget);
 442
 443   /* Override the style properties with HIG-compliant spacings.  Ugh.
 444    * http://developer.gnome.org/projects/gup/hig/1.0/layout.html#layout-dialogs
 445    * http://developer.gnome.org/projects/gup/hig/1.0/windows.html#alert-spacing
 446    */
 447
 448   gtk_container_set_border_width (GTK_CONTAINER (dialog->vbox), 12);
 449   gtk_box_set_spacing (GTK_BOX (dialog->vbox), 24);
 450
 451   gtk_container_set_border_width (GTK_CONTAINER (dialog->action_area), 0);
 452   gtk_box_set_spacing (GTK_BOX (dialog->action_area), 6);
 453 }
 454
 455 /* GtkDialog::response handler */
 456 static void
 457 response_cb (GtkDialog *dialog,
 458              gint       response_id)
 459 {
 460   GtkFileChooserDialogPrivate *priv;
 461
 462   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 463
 464   /* Ugh, try to filter out cancel-type responses */
 465   if (response_id == GTK_RESPONSE_NONE
 466       || response_id == GTK_RESPONSE_REJECT
 467       || response_id == GTK_RESPONSE_DELETE_EVENT
 468       || response_id == GTK_RESPONSE_CANCEL
 469       || response_id == GTK_RESPONSE_CLOSE
 470       || response_id == GTK_RESPONSE_NO
 471       || response_id == GTK_RESPONSE_HELP)
 472     return;
 473
 474   if (!_gtk_file_chooser_embed_should_respond (GTK_FILE_CHOOSER_EMBED (priv->widget)))
 475     g_signal_stop_emission_by_name (dialog, "response");
 476 }
 477
 478 static GtkWidget *
 479 gtk_file_chooser_dialog_new_valist (const gchar          *title,
 480                                     GtkWindow            *parent,
 481                                     GtkFileChooserAction  action,
 482                                     const gchar          *backend,
 483                                     const gchar          *first_button_text,
 484                                     va_list               varargs)
 485 {
 486   GtkWidget *result;
 487   const char *button_text = first_button_text;
 488   gint response_id;
 489
 490   result = g_object_new (GTK_TYPE_FILE_CHOOSER_DIALOG,
 491                          "title", title,
 492                          "action", action,
 493                          "file-system-backend", backend,
 494                          NULL);
 495
 496   if (parent)
 497     gtk_window_set_transient_for (GTK_WINDOW (result), parent);
 498
 499   while (button_text)
 500     {
 501       response_id = va_arg (varargs, gint);
 502       gtk_dialog_add_button (GTK_DIALOG (result), button_text, response_id);
 503       button_text = va_arg (varargs, const gchar *);
 504     }
 505
 506   return result;
 507 }
 508
 509 /**
 510  * gtk_file_chooser_dialog_new:
 511  * @title: Title of the dialog, or %NULL
 512  * @parent: Transient parent of the dialog, or %NULL
 513  * @action: Open or save mode for the dialog
 514  * @first_button_text: stock ID or text to go in the first button, or %NULL
 515  * @Varargs: response ID for the first button, then additional (button, id) pairs, ending with %NULL
 516  *
 517  * Creates a new #GtkFileChooserDialog.  This function is analogous to
 518  * gtk_dialog_new_with_buttons().
 519  *
 520  * Return value: a new #GtkFileChooserDialog
 521  *
 522  * Since: 2.4
 523  **/
 524 GtkWidget *
 525 gtk_file_chooser_dialog_new (const gchar         *title,
 526                              GtkWindow           *parent,
 527                              GtkFileChooserAction action,
 528                              const gchar         *first_button_text,
 529                              ...)
 530 {
 531   GtkWidget *result;
 532   va_list varargs;
 533
 534   va_start (varargs, first_button_text);
 535   result = gtk_file_chooser_dialog_new_valist (title, parent, action,
 536                                                NULL, first_button_text,
 537                                                varargs);
 538   va_end (varargs);
 539
 540   return result;
 541 }
 542
 543 /**
 544  * gtk_file_chooser_dialog_new_with_backend:
 545  * @title: Title of the dialog, or %NULL
 546  * @parent: Transient parent of the dialog, or %NULL
 547  * @backend: The name of the specific filesystem backend to use.
 548  * @action: Open or save mode for the dialog
 549  * @first_button_text: stock ID or text to go in the first button, or %NULL
 550  * @Varargs: response ID for the first button, then additional (button, id) pairs, ending with %NULL
 551  *
 552  * Creates a new #GtkFileChooserDialog with a specified backend. This is
 553  * especially useful if you use gtk_file_chooser_set_local_only() to allow
 554  * non-local files and you use a more expressive vfs, such as gnome-vfs,
 555  * to load files.
 556  *
 557  * Return value: a new #GtkFileChooserDialog
 558  *
 559  * Since: 2.4
 560  **/
 561 GtkWidget *
 562 gtk_file_chooser_dialog_new_with_backend (const gchar          *title,
 563                                           GtkWindow            *parent,
 564                                           GtkFileChooserAction  action,
 565                                           const gchar          *backend,
 566                                           const gchar          *first_button_text,
 567                                           ...)
 568 {
 569   GtkWidget *result;
 570   va_list varargs;
 571
 572   va_start (varargs, first_button_text);
 573   result = gtk_file_chooser_dialog_new_valist (title, parent, action,
 574                                                backend, first_button_text,
 575                                                varargs);
 576   va_end (varargs);
 577
 578   return result;
 579 }