vcs.maemo.org Git - hildon/blob - src/hildon-picker-dialog.c

   1 /*
   2  * This file is a part of hildon
   3  *
   4  * Copyright (C) 2005, 2008 Nokia Corporation.
   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. 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 Free
  18  * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  19  */
  20
  21 /**
  22  * SECTION:hildon-picker-dialog
  23  * @short_description: A utility widget that shows a #HildonTouchSelector widget
  24  *
  25  * #HildonPickerDialog is a dialog that is used to show a
  26  * #HildonTouchSelector widget and a 'Done' button to allow users to
  27  * finish their selections.
  28  *
  29  * The #HildonPickerDialog will show a 'Done' button in case the
  30  * #HildonTouchSelector allows multiple selection. The label of the
  31  * button can be set using hildon_picker_dialog_set_done_label() and
  32  * retrieved using hildon_picker_dialog_get_done_label()
  33  *
  34  * Note that in most cases developers don't need to deal directly with
  35  * this widget. #HildonPickerButton is designed to pop up a
  36  * #HildonPickerDialog and manage the interaction with it.
  37  */
  38
  39 #ifdef HAVE_CONFIG_H
  40 #include <config.h>
  41 #endif
  42
  43 #include <string.h>
  44 #include <stdlib.h>
  45 #include <libintl.h>
  46
  47 #include "hildon-touch-selector.h"
  48 #include "hildon-touch-selector-entry.h"
  49 #include "hildon-picker-dialog.h"
  50
  51 #define _(String)  dgettext("hildon-libs", String)
  52
  53 #define HILDON_PICKER_DIALOG_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj), HILDON_TYPE_PICKER_DIALOG, HildonPickerDialogPrivate))
  54
  55 G_DEFINE_TYPE (HildonPickerDialog, hildon_picker_dialog, HILDON_TYPE_DIALOG)
  56
  57 #define HILDON_TOUCH_SELECTOR_HEIGHT            320
  58
  59 struct _HildonPickerDialogPrivate
  60 {
  61   GtkWidget *selector;
  62   GtkWidget *button;
  63
  64   gulong signal_changed_id;
  65   gulong signal_columns_changed_id;
  66
  67   gboolean center_on_show;
  68   GSList *current_selection;
  69   gchar *current_text;
  70 };
  71
  72 /* properties */
  73 enum
  74 {
  75   PROP_0,
  76   PROP_DONE_BUTTON_TEXT,
  77   PROP_CENTER_ON_SHOW,
  78   PROP_LAST
  79 };
  80
  81 enum
  82 {
  83   RESPONSE,
  84   LAST_SIGNAL
  85 };
  86
  87 #define DEFAULT_DONE_BUTTON_TEXT        _("wdgt_bd_done")
  88
  89 static void
  90 hildon_picker_dialog_set_property               (GObject * object,
  91                                                  guint prop_id,
  92                                                  const GValue * value,
  93                                                  GParamSpec * pspec);
  94
  95 static void
  96 hildon_picker_dialog_get_property               (GObject * object,
  97                                                  guint prop_id,
  98                                                  GValue * value, GParamSpec * pspec);
  99
 100 static void
 101 hildon_picker_dialog_finalize                   (GObject *object);
 102
 103 /* gtkwidget */
 104 static void
 105 hildon_picker_dialog_show                       (GtkWidget *widget);
 106
 107 static void
 108 hildon_picker_dialog_realize                    (GtkWidget *widget);
 109
 110 /* private functions */
 111 static gboolean
 112 requires_done_button                            (HildonPickerDialog * dialog);
 113
 114 static void
 115 prepare_action_area                             (HildonPickerDialog *dialog);
 116
 117 static void
 118 setup_interaction_mode                          (HildonPickerDialog * dialog);
 119
 120 static void
 121 _select_on_selector_changed_cb                  (HildonTouchSelector * dialog,
 122                                                  gint column,
 123                                                  gpointer data);
 124
 125 static gboolean
 126 _hildon_picker_dialog_set_selector              (HildonPickerDialog * dialog,
 127                                                  HildonTouchSelector * selector);
 128
 129 static void
 130 _on_dialog_response                             (GtkDialog *dialog,
 131                                                  gint response_id,
 132                                                  gpointer data);
 133
 134 static void
 135 _save_current_selection                         (HildonPickerDialog *dialog);
 136
 137 static void
 138 _restore_current_selection                      (HildonPickerDialog *dialog);
 139
 140 static void
 141 _clean_current_selection                        (HildonPickerDialog *dialog);
 142
 143 /**********************************************************************************/
 144
 145 static void
 146 hildon_picker_dialog_class_init (HildonPickerDialogClass * class)
 147 {
 148   GObjectClass *gobject_class;
 149   GtkObjectClass *object_class;
 150   GtkWidgetClass *widget_class;
 151   GtkContainerClass *container_class;
 152
 153   gobject_class = (GObjectClass *) class;
 154   object_class = (GtkObjectClass *) class;
 155   widget_class = (GtkWidgetClass *) class;
 156   container_class = (GtkContainerClass *) class;
 157
 158   /* GObject */
 159   gobject_class->set_property = hildon_picker_dialog_set_property;
 160   gobject_class->get_property = hildon_picker_dialog_get_property;
 161   gobject_class->finalize = hildon_picker_dialog_finalize;
 162
 163   /* GtkWidget */
 164   widget_class->show = hildon_picker_dialog_show;
 165   widget_class->realize = hildon_picker_dialog_realize;
 166
 167   /* HildonPickerDialog */
 168   class->set_selector = _hildon_picker_dialog_set_selector;
 169
 170   /* signals */
 171
 172   /* properties */
 173   /**
 174    * HildonPickerDialog
 175    *
 176    * Button label
 177    *
 178    * Since: 2.2
 179    */
 180   g_object_class_install_property (gobject_class,
 181                                    PROP_DONE_BUTTON_TEXT,
 182                                    g_param_spec_string ("done-button-text",
 183                                                         "Done Button Label",
 184                                                         "Done Button Label",
 185                                                         DEFAULT_DONE_BUTTON_TEXT,
 186                                                         G_PARAM_READABLE |
 187                                                         G_PARAM_WRITABLE |
 188                                                         G_PARAM_CONSTRUCT));
 189
 190   g_object_class_install_property (gobject_class,
 191                                    PROP_CENTER_ON_SHOW,
 192                                    g_param_spec_boolean ("center-on-show",
 193                                                          "Center on show",
 194                                                          "If the dialog should center"
 195                                                          " on the current selection"
 196                                                          " when it is showed",
 197                                                          TRUE,
 198                                                          G_PARAM_READWRITE |
 199                                                          G_PARAM_CONSTRUCT));
 200
 201   g_type_class_add_private (object_class, sizeof (HildonPickerDialogPrivate));
 202 }
 203
 204
 205 static void
 206 hildon_picker_dialog_init (HildonPickerDialog * dialog)
 207 {
 208   dialog->priv = HILDON_PICKER_DIALOG_GET_PRIVATE (dialog);
 209
 210   dialog->priv->selector = NULL;
 211   dialog->priv->button =
 212     gtk_dialog_add_button (GTK_DIALOG (dialog), "", GTK_RESPONSE_OK);
 213   gtk_widget_grab_default (dialog->priv->button);
 214
 215   dialog->priv->signal_changed_id = 0;
 216   dialog->priv->signal_columns_changed_id = 0;
 217   dialog->priv->center_on_show = TRUE;
 218   dialog->priv->current_selection = NULL;
 219   dialog->priv->current_text = NULL;
 220
 221   g_signal_connect (G_OBJECT (dialog),
 222                     "response", G_CALLBACK (_on_dialog_response),
 223                     NULL);
 224 }
 225
 226
 227 static void
 228 hildon_picker_dialog_set_property (GObject * object,
 229                                    guint param_id,
 230                                    const GValue * value, GParamSpec * pspec)
 231 {
 232   HildonPickerDialog *dialog;
 233
 234   dialog = HILDON_PICKER_DIALOG (object);
 235
 236   switch (param_id) {
 237   case PROP_DONE_BUTTON_TEXT:
 238     hildon_picker_dialog_set_done_label (HILDON_PICKER_DIALOG (object),
 239                                          g_value_get_string (value));
 240     break;
 241   case PROP_CENTER_ON_SHOW:
 242     dialog->priv->center_on_show = g_value_get_boolean (value);
 243     break;
 244   default:
 245     G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 246     break;
 247   }
 248 }
 249
 250 static void
 251 hildon_picker_dialog_get_property (GObject * object,
 252                                    guint param_id,
 253                                    GValue * value, GParamSpec * pspec)
 254 {
 255   HildonPickerDialog *dialog;
 256
 257   dialog = HILDON_PICKER_DIALOG (object);
 258
 259   switch (param_id) {
 260   case PROP_DONE_BUTTON_TEXT:
 261     g_value_set_string (value, hildon_picker_dialog_get_done_label (dialog));
 262     break;
 263   case PROP_CENTER_ON_SHOW:
 264     g_value_set_boolean (value, dialog->priv->center_on_show);
 265     break;
 266   default:
 267     G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
 268     break;
 269   }
 270 }
 271
 272 static void
 273 hildon_picker_dialog_finalize (GObject *object)
 274 {
 275   _clean_current_selection (HILDON_PICKER_DIALOG (object));
 276
 277   G_OBJECT_CLASS (hildon_picker_dialog_parent_class)->finalize (object);
 278 }
 279
 280 static void
 281 hildon_picker_dialog_show                       (GtkWidget *widget)
 282 {
 283   HildonPickerDialog *dialog = HILDON_PICKER_DIALOG (widget);
 284   HildonTouchSelector *selector;
 285
 286   if (dialog->priv->center_on_show) {
 287     selector = hildon_picker_dialog_get_selector (dialog);
 288     hildon_touch_selector_center_on_selected (selector);
 289   }
 290
 291   _save_current_selection (dialog);
 292   prepare_action_area (dialog);
 293
 294   GTK_WIDGET_CLASS (hildon_picker_dialog_parent_class)->show (widget);
 295 }
 296
 297 static void
 298 hildon_picker_dialog_realize (GtkWidget *widget)
 299 {
 300   setup_interaction_mode (HILDON_PICKER_DIALOG (widget));
 301
 302   GTK_WIDGET_CLASS (hildon_picker_dialog_parent_class)->realize (widget);
 303 }
 304
 305 /* ------------------------------ PRIVATE METHODS ---------------------------- */
 306
 307 static void
 308 _select_on_selector_changed_cb (HildonTouchSelector * selector,
 309                                 gint column, gpointer data)
 310 {
 311   g_return_if_fail (HILDON_IS_PICKER_DIALOG (data));
 312
 313   gtk_dialog_response (GTK_DIALOG (data), GTK_RESPONSE_OK);
 314 }
 315
 316 static gboolean
 317 selection_completed (HildonPickerDialog *dialog)
 318 {
 319   HildonPickerDialogPrivate *priv;
 320   GList *list;
 321   gint i, n_cols;
 322   gboolean all_selected = TRUE;
 323
 324   priv = HILDON_PICKER_DIALOG_GET_PRIVATE (dialog);
 325
 326   n_cols = hildon_touch_selector_get_num_columns (HILDON_TOUCH_SELECTOR (priv->selector));
 327   for (i = 0; i < n_cols; i++) {
 328     list = hildon_touch_selector_get_selected_rows (HILDON_TOUCH_SELECTOR (priv->selector), i);
 329     if (list == NULL) {
 330       all_selected = FALSE;
 331       break;
 332     }
 333     g_list_foreach (list, (GFunc)gtk_tree_path_free, NULL);
 334     g_list_free (list);
 335   }
 336
 337   return all_selected;
 338 }
 339
 340 static void
 341 _on_dialog_response                             (GtkDialog *dialog,
 342                                                  gint response_id,
 343                                                  gpointer data)
 344 {
 345   if (response_id == GTK_RESPONSE_OK) {
 346     if (selection_completed (HILDON_PICKER_DIALOG (dialog)) == FALSE) {
 347       g_signal_stop_emission_by_name (dialog, "response");
 348     }
 349   } else if (response_id == GTK_RESPONSE_DELETE_EVENT) {
 350     _restore_current_selection (HILDON_PICKER_DIALOG (dialog));
 351   }
 352 }
 353
 354 static void
 355 on_selector_columns_changed (HildonTouchSelector * selector, gpointer userdata)
 356 {
 357   HildonPickerDialog * dialog;
 358
 359   dialog = HILDON_PICKER_DIALOG (userdata);
 360
 361   prepare_action_area (dialog);
 362   if (GTK_WIDGET_REALIZED (dialog)) {
 363     setup_interaction_mode (dialog);
 364   }
 365 }
 366
 367 /**
 368  * hildon_picker_dialog_set_done_label:
 369  * @dialog: a #HildonPickerDialog
 370  * @label: a string
 371  *
 372  * Sets a custom string to be used as the 'Done' button label in @dialog.
 373  *
 374  * Since: 2.2
 375  **/
 376 void
 377 hildon_picker_dialog_set_done_label (HildonPickerDialog * dialog,
 378                                      const gchar * label)
 379 {
 380   HildonPickerDialogPrivate *priv;
 381
 382   g_return_if_fail (HILDON_IS_PICKER_DIALOG (dialog));
 383   g_return_if_fail (label != NULL);
 384
 385   priv = HILDON_PICKER_DIALOG_GET_PRIVATE (dialog);
 386
 387   gtk_button_set_label (GTK_BUTTON (priv->button), label);
 388 }
 389
 390 /**
 391  * hildon_picker_dialog_get_done_label:
 392  * @dialog: a #HildonPickerDialog
 393  *
 394  * Retrieves current 'Done' button label.
 395  *
 396  * Returns: the custom string to be used.
 397  *
 398  * Since: 2.2
 399  **/
 400 const gchar *
 401 hildon_picker_dialog_get_done_label (HildonPickerDialog * dialog)
 402 {
 403   HildonPickerDialogPrivate *priv;
 404
 405   g_return_val_if_fail (HILDON_IS_PICKER_DIALOG (dialog), NULL);
 406
 407   priv = HILDON_PICKER_DIALOG_GET_PRIVATE (dialog);
 408
 409   return gtk_button_get_label (GTK_BUTTON (priv->button));
 410 }
 411
 412 static void
 413 free_path_list (GList *list)
 414 {
 415   g_list_foreach (list, (GFunc) gtk_tree_path_free, NULL);
 416   g_list_free (list);
 417 }
 418
 419 static void
 420 _clean_current_selection (HildonPickerDialog *dialog)
 421 {
 422   if (dialog->priv->current_selection) {
 423     g_slist_foreach (dialog->priv->current_selection, (GFunc) free_path_list, NULL);
 424     g_slist_free (dialog->priv->current_selection);
 425     dialog->priv->current_selection = NULL;
 426   }
 427   if (dialog->priv->current_text) {
 428     g_free (dialog->priv->current_text);
 429     dialog->priv->current_text = NULL;
 430   }
 431 }
 432
 433 static void
 434 _save_current_selection (HildonPickerDialog *dialog)
 435 {
 436   HildonTouchSelector *selector;
 437   gint i, columns;
 438
 439   selector = HILDON_TOUCH_SELECTOR (dialog->priv->selector);
 440
 441   _clean_current_selection (dialog);
 442
 443   columns = hildon_touch_selector_get_num_columns (selector);
 444   for (i = 0; i  < columns; i++) {
 445     dialog->priv->current_selection
 446       = g_slist_append (dialog->priv->current_selection,
 447                         hildon_touch_selector_get_selected_rows (selector, i));
 448   }
 449   if (HILDON_IS_TOUCH_SELECTOR_ENTRY (selector)) {
 450           HildonEntry *entry = hildon_touch_selector_entry_get_entry (HILDON_TOUCH_SELECTOR_ENTRY (selector));
 451           dialog->priv->current_text = g_strdup (hildon_entry_get_text (entry));
 452   }
 453 }
 454
 455 static void
 456 _restore_current_selection (HildonPickerDialog *dialog)
 457 {
 458   GSList *current_selection, *iter;
 459   GList *selected, *selected_iter;
 460   GtkTreePath *current_path;
 461   HildonTouchSelector *selector;
 462   GtkTreeModel *model;
 463   GtkTreeIter tree_iter;
 464   gint i;
 465
 466   if (dialog->priv->current_selection == NULL)
 467     return;
 468
 469   current_selection = dialog->priv->current_selection;
 470   selector = HILDON_TOUCH_SELECTOR (dialog->priv->selector);
 471
 472   if (hildon_touch_selector_get_num_columns (selector) !=
 473       g_slist_length (current_selection)) {
 474     /* We conclude that if the current selection has the same
 475        numbers of columns that the selector, all this ok
 476        Anyway this shouldn't happen. */
 477     g_critical ("Trying to restore the selection on a selector after change"
 478                 " the number of columns. Are you removing columns while the"
 479                 " dialog is open?");
 480     return;
 481   }
 482
 483   if (dialog->priv->signal_changed_id)
 484     g_signal_handler_block (selector, dialog->priv->signal_changed_id);
 485   for (iter = current_selection, i = 0; iter; iter = g_slist_next (iter), i++) {
 486     selected = (GList *) (iter->data);
 487     model = hildon_touch_selector_get_model (selector, i);
 488     hildon_touch_selector_unselect_all (selector, i);
 489     for (selected_iter = selected; selected_iter; selected_iter = g_list_next (selected_iter)) {
 490       current_path = (GtkTreePath *) selected_iter->data;
 491       gtk_tree_model_get_iter (model, &tree_iter, current_path);
 492       hildon_touch_selector_select_iter (selector, i, &tree_iter, FALSE);
 493     }
 494   }
 495   if (HILDON_IS_TOUCH_SELECTOR_ENTRY (selector) && dialog->priv->current_text != NULL) {
 496     HildonEntry *entry = hildon_touch_selector_entry_get_entry (HILDON_TOUCH_SELECTOR_ENTRY (selector));
 497     hildon_entry_set_text (entry, dialog->priv->current_text);
 498   }
 499   if (dialog->priv->signal_changed_id)
 500     g_signal_handler_unblock (selector, dialog->priv->signal_changed_id);
 501 }
 502
 503 static gboolean
 504 requires_done_button (HildonPickerDialog * dialog)
 505 {
 506   return hildon_touch_selector_has_multiple_selection
 507     (HILDON_TOUCH_SELECTOR (dialog->priv->selector));
 508 }
 509
 510 static void
 511 prepare_action_area (HildonPickerDialog *dialog)
 512 {
 513   if (requires_done_button (dialog)) {
 514     gtk_dialog_set_has_separator (GTK_DIALOG (dialog), TRUE);
 515     gtk_widget_show (GTK_DIALOG (dialog)->action_area);
 516   } else {
 517     gtk_dialog_set_has_separator (GTK_DIALOG (dialog), FALSE);
 518     gtk_widget_hide (GTK_DIALOG (dialog)->action_area);
 519   }
 520 }
 521
 522 static void
 523 setup_interaction_mode (HildonPickerDialog * dialog)
 524 {
 525   if (dialog->priv->signal_changed_id) {
 526     g_signal_handler_disconnect (dialog->priv->selector,
 527                                  dialog->priv->signal_changed_id);
 528   }
 529
 530   if (requires_done_button (dialog) == FALSE) {
 531     dialog->priv->signal_changed_id =
 532       g_signal_connect (G_OBJECT (dialog->priv->selector), "changed",
 533                         G_CALLBACK (_select_on_selector_changed_cb), dialog);
 534   }
 535 }
 536
 537 /*------------------------- PUBLIC METHODS ---------------------------- */
 538
 539 /**
 540  * hildon_picker_dialog_new:
 541  * @parent: the parent window
 542  *
 543  * Creates a new #HildonPickerDialog
 544  *
 545  * Returns: a new #HildonPickerDialog
 546  *
 547  * Since: 2.2
 548  **/
 549 GtkWidget *
 550 hildon_picker_dialog_new (GtkWindow * parent)
 551 {
 552   GtkDialog *dialog = NULL;
 553
 554   dialog = g_object_new (HILDON_TYPE_PICKER_DIALOG, NULL);
 555
 556   if (parent) {
 557     gtk_window_set_transient_for (GTK_WINDOW (dialog), parent);
 558   }
 559
 560   return GTK_WIDGET (dialog);
 561 }
 562
 563
 564 static gboolean
 565 _hildon_picker_dialog_set_selector (HildonPickerDialog * dialog,
 566                                     HildonTouchSelector * selector)
 567 {
 568   g_object_ref (selector);
 569
 570   /* Remove the old selector, if any */
 571   if (dialog->priv->selector != NULL) {
 572     gtk_container_remove (GTK_CONTAINER (GTK_DIALOG (dialog)->vbox),
 573                           dialog->priv->selector);
 574     if (dialog->priv->signal_columns_changed_id) {
 575             g_signal_handler_disconnect (dialog->priv->selector,
 576                                          dialog->priv->signal_columns_changed_id);
 577     }
 578   }
 579
 580   dialog->priv->selector = GTK_WIDGET (selector);
 581
 582   /* Pack the new selector */
 583   gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog)->vbox),
 584                       dialog->priv->selector, TRUE, TRUE, 0);
 585
 586   g_object_unref (selector);
 587
 588   /* Ensure that the dialog's height is correct */
 589   gtk_widget_set_size_request (GTK_WIDGET (dialog->priv->selector), -1,
 590                                HILDON_TOUCH_SELECTOR_HEIGHT);
 591
 592   gtk_widget_show (dialog->priv->selector);
 593
 594   prepare_action_area (dialog);
 595   if (GTK_WIDGET_REALIZED (dialog)) {
 596     setup_interaction_mode (dialog);
 597   }
 598
 599   dialog->priv->signal_columns_changed_id = g_signal_connect (G_OBJECT (dialog->priv->selector),
 600                                                               "columns-changed",
 601                                                               G_CALLBACK (on_selector_columns_changed), dialog);
 602   return TRUE;
 603 }
 604
 605 /**
 606  * hildon_picker_dialog_set_selector:
 607  * @dialog: a #HildonPickerDialog
 608  * @selector: a #HildonTouchSelector
 609  *
 610  * Sets @selector as the #HildonTouchSelector to be shown in @dialog
 611  *
 612  * Returns: %TRUE if @selector was set, %FALSE otherwise
 613  *
 614  * Since: 2.2
 615  **/
 616 gboolean
 617 hildon_picker_dialog_set_selector (HildonPickerDialog * dialog,
 618                                    HildonTouchSelector * selector)
 619 {
 620   g_return_val_if_fail (HILDON_IS_PICKER_DIALOG (dialog), FALSE);
 621   g_return_val_if_fail (HILDON_IS_TOUCH_SELECTOR (selector), FALSE);
 622
 623   return HILDON_PICKER_DIALOG_GET_CLASS (dialog)->set_selector (dialog, selector);
 624 }
 625
 626 /**
 627  * hildon_picker_dialog_get_selector:
 628  * @dialog: a #HildonPickerDialog
 629  *
 630  * Retrieves the #HildonTouchSelector associated to @dialog.
 631  *
 632  * Returns: a #HildonTouchSelector
 633  *
 634  * Since: 2.2
 635  **/
 636 HildonTouchSelector *
 637 hildon_picker_dialog_get_selector (HildonPickerDialog * dialog)
 638 {
 639   g_return_val_if_fail (HILDON_IS_PICKER_DIALOG (dialog), NULL);
 640
 641   return HILDON_TOUCH_SELECTOR (dialog->priv->selector);
 642 }