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 <config.h>
  22 #include "gtkfilechooserdialog.h"
  23 #include "gtkfilechooserwidget.h"
  24 #include "gtkfilechooserutils.h"
  25 #include "gtkfilechooserembed.h"
  26 #include "gtkfilesystem.h"
  27 #include "gtktypebuiltins.h"
  28
  29 #include <stdarg.h>
  30
  31 struct _GtkFileChooserDialogPrivate
  32 {
  33   GtkWidget *widget;
  34
  35   char *file_system;
  36
  37   /* for use with GtkFileChooserEmbed */
  38   gint default_width;
  39   gint default_height;
  40   gboolean resize_horizontally;
  41   gboolean resize_vertically;
  42 };
  43
  44 #define GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE(o)  (GTK_FILE_CHOOSER_DIALOG (o)->priv)
  45
  46 static void gtk_file_chooser_dialog_class_init (GtkFileChooserDialogClass *class);
  47 static void gtk_file_chooser_dialog_init       (GtkFileChooserDialog      *dialog);
  48 static void gtk_file_chooser_dialog_finalize   (GObject                   *object);
  49
  50 static GObject* gtk_file_chooser_dialog_constructor  (GType                  type,
  51                                                       guint                  n_construct_properties,
  52                                                       GObjectConstructParam *construct_params);
  53 static void     gtk_file_chooser_dialog_set_property (GObject               *object,
  54                                                       guint                  prop_id,
  55                                                       const GValue          *value,
  56                                                       GParamSpec            *pspec);
  57 static void     gtk_file_chooser_dialog_get_property (GObject               *object,
  58                                                       guint                  prop_id,
  59                                                       GValue                *value,
  60                                                       GParamSpec            *pspec);
  61
  62 static void     gtk_file_chooser_dialog_style_set    (GtkWidget             *widget,
  63                                                       GtkStyle              *previous_style);
  64
  65 static void response_cb (GtkDialog *dialog,
  66                          gint       response_id);
  67
  68 static GObjectClass *parent_class;
  69
  70 GType
  71 gtk_file_chooser_dialog_get_type (void)
  72 {
  73   static GType file_chooser_dialog_type = 0;
  74
  75   if (!file_chooser_dialog_type)
  76     {
  77       static const GTypeInfo file_chooser_dialog_info =
  78       {
  79         sizeof (GtkFileChooserDialogClass),
  80         NULL,           /* base_init */
  81         NULL,           /* base_finalize */
  82         (GClassInitFunc) gtk_file_chooser_dialog_class_init,
  83         NULL,           /* class_finalize */
  84         NULL,           /* class_data */
  85         sizeof (GtkFileChooserDialog),
  86         0,              /* n_preallocs */
  87         (GInstanceInitFunc) gtk_file_chooser_dialog_init,
  88       };
  89
  90       static const GInterfaceInfo file_chooser_info =
  91       {
  92         (GInterfaceInitFunc) _gtk_file_chooser_delegate_iface_init, /* interface_init */
  93         NULL,                                                       /* interface_finalize */
  94         NULL                                                        /* interface_data */
  95       };
  96
  97       file_chooser_dialog_type = g_type_register_static (GTK_TYPE_DIALOG, "GtkFileChooserDialog",
  98                                                          &file_chooser_dialog_info, 0);
  99       g_type_add_interface_static (file_chooser_dialog_type,
 100                                    GTK_TYPE_FILE_CHOOSER,
 101                                    &file_chooser_info);
 102     }
 103
 104   return file_chooser_dialog_type;
 105 }
 106
 107 static void
 108 gtk_file_chooser_dialog_class_init (GtkFileChooserDialogClass *class)
 109 {
 110   GObjectClass *gobject_class = G_OBJECT_CLASS (class);
 111   GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
 112
 113   parent_class = g_type_class_peek_parent (class);
 114
 115   gobject_class->constructor = gtk_file_chooser_dialog_constructor;
 116   gobject_class->set_property = gtk_file_chooser_dialog_set_property;
 117   gobject_class->get_property = gtk_file_chooser_dialog_get_property;
 118   gobject_class->finalize = gtk_file_chooser_dialog_finalize;
 119
 120   widget_class->style_set = gtk_file_chooser_dialog_style_set;
 121
 122   _gtk_file_chooser_install_properties (gobject_class);
 123
 124   g_type_class_add_private (class, sizeof (GtkFileChooserDialogPrivate));
 125 }
 126
 127 static void
 128 gtk_file_chooser_dialog_init (GtkFileChooserDialog *dialog)
 129 {
 130   GtkFileChooserDialogPrivate *priv = G_TYPE_INSTANCE_GET_PRIVATE (dialog,
 131                                                                    GTK_TYPE_FILE_CHOOSER_DIALOG,
 132                                                                    GtkFileChooserDialogPrivate);
 133   dialog->priv = priv;
 134   dialog->priv->default_width = -1;
 135   dialog->priv->default_height = -1;
 136   dialog->priv->resize_horizontally = TRUE;
 137   dialog->priv->resize_vertically = TRUE;
 138
 139   gtk_dialog_set_has_separator (GTK_DIALOG (dialog), FALSE);
 140
 141   /* We do a signal connection here rather than overriding the method in
 142    * class_init because GtkDialog::response is a RUN_LAST signal.  We want *our*
 143    * handler to be run *first*, regardless of whether the user installs response
 144    * handlers of his own.
 145    */
 146   g_signal_connect (dialog, "response",
 147                     G_CALLBACK (response_cb), NULL);
 148 }
 149
 150 static void
 151 gtk_file_chooser_dialog_finalize (GObject *object)
 152 {
 153   GtkFileChooserDialog *dialog = GTK_FILE_CHOOSER_DIALOG (object);
 154
 155   g_free (dialog->priv->file_system);
 156
 157   G_OBJECT_CLASS (parent_class)->finalize (object);
 158 }
 159
 160 /* Callback used when the user activates a file in the file chooser widget */
 161 static void
 162 file_chooser_widget_file_activated (GtkFileChooser       *chooser,
 163                                     GtkFileChooserDialog *dialog)
 164 {
 165   gtk_window_activate_default (GTK_WINDOW (dialog));
 166 }
 167
 168 static void
 169 file_chooser_widget_update_hints (GtkFileChooserDialog *dialog)
 170 {
 171   GtkFileChooserDialogPrivate *priv;
 172   GdkGeometry geometry;
 173
 174   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 175
 176   geometry.min_width = -1;
 177   geometry.min_height = -1;
 178   geometry.max_width = (priv->resize_horizontally?G_MAXSHORT:-1);
 179   geometry.max_height = (priv->resize_vertically?G_MAXSHORT:-1);
 180
 181   gtk_window_set_geometry_hints (GTK_WINDOW (dialog), NULL,
 182                                  &geometry,
 183                                  GDK_HINT_MIN_SIZE | GDK_HINT_MAX_SIZE);
 184 }
 185
 186 static void
 187 file_chooser_widget_default_realized_size_changed (GtkWidget            *widget,
 188                                                    GtkFileChooserDialog *dialog)
 189 {
 190   GtkFileChooserDialogPrivate *priv;
 191   gint width;
 192   gint height;
 193   gint default_width, default_height;
 194   GtkRequisition req;
 195   gboolean resize_horizontally;
 196   gboolean resize_vertically;
 197   gboolean update_hints;
 198   gint dx = 0, dy = 0;
 199   gint cur_width, cur_height;
 200
 201   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 202
 203   /* Force a size request of everything before we start.  This will make sure
 204    * that widget->requisition is meaningful. */
 205   gtk_widget_size_request (GTK_WIDGET (dialog), &req);
 206   gtk_window_get_size (GTK_WINDOW (dialog), &cur_width, &cur_height);
 207   width = GTK_WIDGET (dialog)->requisition.width - priv->widget->requisition.width;
 208   height = GTK_WIDGET (dialog)->requisition.height - priv->widget->requisition.height;
 209   _gtk_file_chooser_embed_get_default_size (GTK_FILE_CHOOSER_EMBED (priv->widget),
 210                                             &default_width, &default_height);
 211
 212   /* Ideal target size modulo any resizing */
 213   width = default_width + width;
 214   height = default_height + height;
 215
 216   /* Now, we test for resizability */
 217   update_hints = FALSE;
 218   _gtk_file_chooser_embed_get_resizable_hints (GTK_FILE_CHOOSER_EMBED (priv->widget),
 219                                                &resize_horizontally,
 220                                                &resize_vertically);
 221   resize_vertically = (!! resize_vertically);     /* normalize */
 222   resize_horizontally = (!! resize_horizontally);
 223
 224   if (resize_horizontally && priv->resize_horizontally)
 225     {
 226       dx = default_width - priv->default_width;
 227       priv->default_width = default_width;
 228     }
 229   else if (resize_horizontally && ! priv->resize_horizontally)
 230     {
 231       /* We restore to the ideal size + any change in default_size (which is not
 232        * expected).  It would be nicer to store the older size to restore to in
 233        * the future. */
 234       dx = default_width - priv->default_width;
 235       dx += width - cur_width;
 236       priv->default_width = default_width;
 237       update_hints = TRUE;
 238     }
 239   else
 240     {
 241       update_hints = TRUE;
 242     }
 243
 244   if (resize_vertically && priv->resize_vertically)
 245     {
 246       dy = default_height - priv->default_height;
 247       priv->default_height = default_height;
 248     }
 249   else if (resize_vertically && ! priv->resize_vertically)
 250     {
 251       dy = default_height - priv->default_height;
 252       dy += height - cur_height;
 253       priv->default_height = default_height;
 254       update_hints = TRUE;
 255     }
 256   else
 257     {
 258       update_hints = TRUE;
 259     }
 260
 261   priv->resize_horizontally = resize_horizontally;
 262   priv->resize_vertically = resize_vertically;
 263
 264   /* FIXME: We should make sure that we arent' bigger than the current screen */
 265   if (dx != 0 || dy != 0)
 266     {
 267       gtk_window_resize (GTK_WINDOW (dialog),
 268                          cur_width + dx,
 269                          cur_height + dy);
 270     }
 271
 272   /* Only store the size if we can resize in that direction. */
 273   if (update_hints)
 274     file_chooser_widget_update_hints (dialog);
 275 }
 276
 277 static void
 278 file_chooser_widget_default_unrealized_size_changed (GtkWidget            *widget,
 279                                                      GtkFileChooserDialog *dialog)
 280 {
 281   GtkFileChooserDialogPrivate *priv;
 282   GtkRequisition req;
 283   gint width, height;
 284
 285   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 286   gtk_widget_size_request (GTK_WIDGET (dialog), &req);
 287
 288   _gtk_file_chooser_embed_get_resizable_hints (GTK_FILE_CHOOSER_EMBED (priv->widget),
 289                                                &(priv->resize_horizontally),
 290                                                &(priv->resize_vertically));
 291   _gtk_file_chooser_embed_get_default_size (GTK_FILE_CHOOSER_EMBED (priv->widget),
 292                                             &(priv->default_width), &(priv->default_height));
 293
 294   /* Determine how much space the rest of the dialog uses compared to priv->widget */
 295   width = priv->default_width + GTK_WIDGET (dialog)->requisition.width - priv->widget->requisition.width;
 296   height = priv->default_height + GTK_WIDGET (dialog)->requisition.height - priv->widget->requisition.height;
 297
 298   gtk_window_set_default_size (GTK_WINDOW (dialog), width, height);
 299   file_chooser_widget_update_hints (dialog);
 300 }
 301
 302 static void
 303 file_chooser_widget_default_size_changed (GtkWidget            *widget,
 304                                           GtkFileChooserDialog *dialog)
 305 {
 306   if (GTK_WIDGET_REALIZED (dialog))
 307     file_chooser_widget_default_realized_size_changed (widget, dialog);
 308   else
 309     file_chooser_widget_default_unrealized_size_changed (widget, dialog);
 310 }
 311
 312 static GObject*
 313 gtk_file_chooser_dialog_constructor (GType                  type,
 314                                      guint                  n_construct_properties,
 315                                      GObjectConstructParam *construct_params)
 316 {
 317   GtkFileChooserDialogPrivate *priv;
 318   GObject *object;
 319
 320   object = parent_class->constructor (type,
 321                                       n_construct_properties,
 322                                       construct_params);
 323   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
 324
 325   gtk_widget_push_composite_child ();
 326
 327   if (priv->file_system)
 328     priv->widget = g_object_new (GTK_TYPE_FILE_CHOOSER_WIDGET,
 329                                  "file-system-backend", priv->file_system,
 330                                  NULL);
 331   else
 332     priv->widget = g_object_new (GTK_TYPE_FILE_CHOOSER_WIDGET, NULL);
 333
 334   g_signal_connect (priv->widget, "file-activated",
 335                     G_CALLBACK (file_chooser_widget_file_activated), object);
 336   g_signal_connect (priv->widget, "default-size-changed",
 337                     G_CALLBACK (file_chooser_widget_default_size_changed), object);
 338
 339   gtk_box_pack_start (GTK_BOX (GTK_DIALOG (object)->vbox), priv->widget, TRUE, TRUE, 0);
 340   gtk_widget_show (priv->widget);
 341
 342   _gtk_file_chooser_set_delegate (GTK_FILE_CHOOSER (object),
 343                                   GTK_FILE_CHOOSER (priv->widget));
 344
 345   gtk_widget_pop_composite_child ();
 346
 347   return object;
 348 }
 349
 350 static void
 351 gtk_file_chooser_dialog_set_property (GObject         *object,
 352                                       guint            prop_id,
 353                                       const GValue    *value,
 354                                       GParamSpec      *pspec)
 355
 356 {
 357   GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
 358
 359   switch (prop_id)
 360     {
 361     case GTK_FILE_CHOOSER_PROP_FILE_SYSTEM_BACKEND:
 362       g_free (priv->file_system);
 363       priv->file_system = g_value_dup_string (value);
 364       break;
 365     default:
 366       g_object_set_property (G_OBJECT (priv->widget), pspec->name, value);
 367       break;
 368     }
 369 }
 370
 371 static void
 372 gtk_file_chooser_dialog_get_property (GObject         *object,
 373                                       guint            prop_id,
 374                                       GValue          *value,
 375                                       GParamSpec      *pspec)
 376 {
 377   GtkFileChooserDialogPrivate *priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (object);
 378
 379   g_object_get_property (G_OBJECT (priv->widget), pspec->name, value);
 380 }
 381
 382 #if 0
 383 static void
 384 set_default_size (GtkFileChooserDialog *dialog)
 385 {
 386   GtkWidget *widget;
 387   GtkWindow *window;
 388   int default_width, default_height;
 389   int width, height;
 390   int font_size;
 391   GdkScreen *screen;
 392   int monitor_num;
 393   GtkRequisition req;
 394   GdkRectangle monitor;
 395
 396   widget = GTK_WIDGET (dialog);
 397   window = GTK_WINDOW (dialog);
 398
 399   /* Size based on characters */
 400
 401   font_size = pango_font_description_get_size (widget->style->font_desc);
 402   font_size = PANGO_PIXELS (font_size);
 403
 404   width = font_size * NUM_CHARS;
 405   height = font_size * NUM_LINES;
 406
 407   /* Use at least the requisition size... */
 408
 409   gtk_widget_size_request (widget, &req);
 410   width = MAX (width, req.width);
 411   height = MAX (height, req.height);
 412
 413   /* ... but no larger than the monitor */
 414
 415   screen = gtk_widget_get_screen (widget);
 416   monitor_num = gdk_screen_get_monitor_at_window (screen, widget->window);
 417
 418   gdk_screen_get_monitor_geometry (screen, monitor_num, &monitor);
 419
 420   width = MIN (width, monitor.width * 3 / 4);
 421   height = MIN (height, monitor.height * 3 / 4);
 422
 423   /* Set size */
 424
 425   gtk_window_get_default_size (window, &default_width, &default_height);
 426
 427   gtk_window_set_default_size (window,
 428                                (default_width == -1) ? width : default_width,
 429                                (default_height == -1) ? height : default_height);
 430 }
 431 #endif
 432
 433 static void
 434 gtk_file_chooser_dialog_style_set (GtkWidget *widget,
 435                                    GtkStyle  *previous_style)
 436 {
 437   GtkDialog *dialog;
 438
 439   if (GTK_WIDGET_CLASS (parent_class)->style_set)
 440     GTK_WIDGET_CLASS (parent_class)->style_set (widget, previous_style);
 441
 442   dialog = GTK_DIALOG (widget);
 443
 444   /* Override the style properties with HIG-compliant spacings.  Ugh.
 445    * http://developer.gnome.org/projects/gup/hig/1.0/layout.html#layout-dialogs
 446    * http://developer.gnome.org/projects/gup/hig/1.0/windows.html#alert-spacing
 447    */
 448
 449   gtk_container_set_border_width (GTK_CONTAINER (dialog->vbox), 12);
 450   gtk_box_set_spacing (GTK_BOX (dialog->vbox), 24);
 451
 452   gtk_container_set_border_width (GTK_CONTAINER (dialog->action_area), 0);
 453   gtk_box_set_spacing (GTK_BOX (dialog->action_area), 6);
 454 }
 455
 456 /* GtkDialog::response handler */
 457 static void
 458 response_cb (GtkDialog *dialog,
 459              gint       response_id)
 460 {
 461   GtkFileChooserDialogPrivate *priv;
 462
 463   priv = GTK_FILE_CHOOSER_DIALOG_GET_PRIVATE (dialog);
 464
 465   /* Ugh, try to filter out cancel-type responses */
 466   if (response_id == GTK_RESPONSE_NONE
 467       || response_id == GTK_RESPONSE_REJECT
 468       || response_id == GTK_RESPONSE_DELETE_EVENT
 469       || response_id == GTK_RESPONSE_CANCEL
 470       || response_id == GTK_RESPONSE_CLOSE
 471       || response_id == GTK_RESPONSE_NO
 472       || response_id == GTK_RESPONSE_HELP)
 473     return;
 474
 475   if (!_gtk_file_chooser_embed_should_respond (GTK_FILE_CHOOSER_EMBED (priv->widget)))
 476     g_signal_stop_emission_by_name (dialog, "response");
 477 }
 478
 479 static GtkWidget *
 480 gtk_file_chooser_dialog_new_valist (const gchar          *title,
 481                                     GtkWindow            *parent,
 482                                     GtkFileChooserAction  action,
 483                                     const gchar          *backend,
 484                                     const gchar          *first_button_text,
 485                                     va_list               varargs)
 486 {
 487   GtkWidget *result;
 488   const char *button_text = first_button_text;
 489   gint response_id;
 490
 491   result = g_object_new (GTK_TYPE_FILE_CHOOSER_DIALOG,
 492                          "title", title,
 493                          "action", action,
 494                          "file-system-backend", backend,
 495                          NULL);
 496
 497   if (parent)
 498     gtk_window_set_transient_for (GTK_WINDOW (result), parent);
 499
 500   while (button_text)
 501     {
 502       response_id = va_arg (varargs, gint);
 503       gtk_dialog_add_button (GTK_DIALOG (result), button_text, response_id);
 504       button_text = va_arg (varargs, const gchar *);
 505     }
 506
 507   return result;
 508 }
 509
 510 /**
 511  * gtk_file_chooser_dialog_new:
 512  * @title: Title of the dialog, or %NULL
 513  * @parent: Transient parent of the dialog, or %NULL
 514  * @action: Open or save mode for the dialog
 515  * @first_button_text: stock ID or text to go in the first button, or %NULL
 516  * @Varargs: response ID for the first button, then additional (button, id) pairs, ending with %NULL
 517  *
 518  * Creates a new #GtkFileChooserDialog.  This function is analogous to
 519  * gtk_dialog_new_with_buttons().
 520  *
 521  * Return value: a new #GtkFileChooserDialog
 522  *
 523  * Since: 2.4
 524  **/
 525 GtkWidget *
 526 gtk_file_chooser_dialog_new (const gchar         *title,
 527                              GtkWindow           *parent,
 528                              GtkFileChooserAction action,
 529                              const gchar         *first_button_text,
 530                              ...)
 531 {
 532   GtkWidget *result;
 533   va_list varargs;
 534
 535   va_start (varargs, first_button_text);
 536   result = gtk_file_chooser_dialog_new_valist (title, parent, action,
 537                                                NULL, first_button_text,
 538                                                varargs);
 539   va_end (varargs);
 540
 541   return result;
 542 }
 543
 544 /**
 545  * gtk_file_chooser_dialog_new_with_backend:
 546  * @title: Title of the dialog, or %NULL
 547  * @parent: Transient parent of the dialog, or %NULL
 548  * @backend: The name of the specific filesystem backend to use.
 549  * @action: Open or save mode for the dialog
 550  * @first_button_text: stock ID or text to go in the first button, or %NULL
 551  * @Varargs: response ID for the first button, then additional (button, id) pairs, ending with %NULL
 552  *
 553  * Creates a new #GtkFileChooserDialog with a specified backend. This is
 554  * especially useful if you use gtk_file_chooser_set_local_only() to allow
 555  * non-local files and you use a more expressive vfs, such as gnome-vfs,
 556  * to load files.
 557  *
 558  * Return value: a new #GtkFileChooserDialog
 559  *
 560  * Since: 2.4
 561  **/
 562 GtkWidget *
 563 gtk_file_chooser_dialog_new_with_backend (const gchar          *title,
 564                                           GtkWindow            *parent,
 565                                           GtkFileChooserAction  action,
 566                                           const gchar          *backend,
 567                                           const gchar          *first_button_text,
 568                                           ...)
 569 {
 570   GtkWidget *result;
 571   va_list varargs;
 572
 573   va_start (varargs, first_button_text);
 574   result = gtk_file_chooser_dialog_new_valist (title, parent, action,
 575                                                backend, first_button_text,
 576                                                varargs);
 577   va_end (varargs);
 578
 579   return result;
 580 }