1 /* gtkcombo - combo widget for gtk+
2 * Copyright 1997 Paolo Molaro
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the Free
16 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 #include "gtkbutton.h"
28 #include "gtklistitem.h"
29 #include "gtkscrolledwindow.h"
31 #include "gtksignal.h"
32 #include "gtkwindow.h"
33 #include "gdk/gdkkeysyms.h"
36 const gchar *gtk_combo_string_key = "gtk-combo-string-value";
38 #define COMBO_LIST_MAX_HEIGHT 400
40 static void gtk_combo_class_init (GtkComboClass *klass);
41 static void gtk_combo_init (GtkCombo *combo);
42 static void gtk_combo_destroy (GtkObject *combo);
43 static GtkListItem *gtk_combo_find (GtkCombo *combo);
44 static gchar * gtk_combo_func (GtkListItem *li);
45 static gint gtk_combo_focus_idle (GtkCombo *combo);
46 static gint gtk_combo_entry_focus_out (GtkEntry *entry,
49 static void gtk_combo_get_pos (GtkCombo *combo,
54 static void gtk_combo_popup_list (GtkButton *button,
56 static void gtk_combo_update_entry (GtkList *list,
58 static void gtk_combo_update_list (GtkEntry *entry,
60 static gint gtk_combo_button_press (GtkWidget *widget,
63 static gint gtk_combo_list_key_press (GtkWidget *widget,
66 static gint gtk_combo_entry_key_press (GtkEntry *widget,
69 static void gtk_combo_item_destroy (GtkObject *object);
71 static GtkHBoxClass *parent_class = NULL;
74 gtk_combo_class_init (GtkComboClass * klass)
76 GtkObjectClass *oclass;
78 parent_class = gtk_type_class (gtk_hbox_get_type ());
79 oclass = (GtkObjectClass *) klass;
81 oclass->destroy = gtk_combo_destroy;
85 gtk_combo_destroy (GtkObject * combo)
87 gtk_widget_destroy (GTK_COMBO (combo)->popwin);
88 gtk_widget_unref (GTK_COMBO (combo)->popwin);
90 if (GTK_OBJECT_CLASS (parent_class)->destroy)
91 (*GTK_OBJECT_CLASS (parent_class)->destroy) (combo);
95 gtk_combo_entry_key_press (GtkEntry * entry, GdkEventKey * event, GtkCombo * combo)
99 /*if ( event->keyval == GDK_Tab ) {
100 gtk_signal_emit_stop_by_name (GTK_OBJECT (entry), "key_press_event");
103 if (!combo->use_arrows || !GTK_LIST (combo->list)->children)
105 li = g_list_find (GTK_LIST (combo->list)->children, gtk_combo_find (combo));
107 if ((event->keyval == GDK_Up)
108 || (event->keyval == GDK_KP_Up)
109 || ((event->state & GDK_MOD1_MASK) && ((event->keyval == 'p') || (event->keyval == 'P'))))
113 if (!li && combo->use_arrows_always)
115 li = g_list_last (GTK_LIST (combo->list)->children);
119 gtk_list_select_child (GTK_LIST (combo->list), GTK_WIDGET (li->data));
120 gtk_signal_emit_stop_by_name (GTK_OBJECT (entry), "key_press_event");
124 else if ((event->keyval == GDK_Down)
125 || (event->keyval == GDK_KP_Down)
126 || ((event->state & GDK_MOD1_MASK) && ((event->keyval == 'n') || (event->keyval == 'N'))))
130 if (!li && combo->use_arrows_always)
132 li = GTK_LIST (combo->list)->children;
136 gtk_list_select_child (GTK_LIST (combo->list), GTK_WIDGET (li->data));
137 gtk_signal_emit_stop_by_name (GTK_OBJECT (entry), "key_press_event");
145 gtk_combo_find (GtkCombo * combo)
150 int (*string_compare) (const char *, const char *);
152 if (combo->case_sensitive)
153 string_compare = strcmp;
155 string_compare = (void*) g_strcasecmp;
157 text = gtk_entry_get_text (GTK_ENTRY (combo->entry));
158 clist = GTK_LIST (combo->list)->children;
160 while (clist && clist->data)
162 ltext = gtk_combo_func (GTK_LIST_ITEM (clist->data));
165 if (!(*string_compare) (ltext, text))
166 return (GtkListItem *) clist->data;
174 gtk_combo_func (GtkListItem * li)
179 ltext = (gchar *) gtk_object_get_data (GTK_OBJECT (li), gtk_combo_string_key);
182 label = GTK_BIN (li)->child;
183 if (!label || !GTK_IS_LABEL (label))
185 gtk_label_get (GTK_LABEL (label), <ext);
191 gtk_combo_focus_idle (GtkCombo * combo)
194 gtk_widget_grab_focus (combo->entry);
199 gtk_combo_entry_focus_out (GtkEntry * entry, GdkEventFocus * event, GtkCombo * combo)
202 if (combo->value_in_list && !gtk_combo_find (combo))
204 /* gdk_beep(); *//* this can be annoying */
205 if (combo->ok_if_empty && !strcmp (gtk_entry_get_text (entry), ""))
208 printf ("INVALID ENTRY: `%s'\n", gtk_entry_get_text (entry));
210 gtk_grab_add (GTK_WIDGET (combo));
211 /* this is needed because if we call gtk_widget_grab_focus()
212 it isn't guaranteed it's the *last* call before the main-loop,
213 so the focus can be lost anyway...
214 the signal_emit_stop doesn't seem to work either...
216 gtk_idle_add ((GtkFunction) gtk_combo_focus_idle, combo);
217 /*gtk_signal_emit_stop_by_name(GTK_OBJECT(entry), "focus_out_event"); */
224 gtk_combo_get_pos (GtkCombo * combo, gint * x, gint * y, gint * height, gint * width)
226 GtkAllocation *pos = &(GTK_WIDGET (combo->entry)->allocation);
229 gint some_more = 10 + GTK_CONTAINER (combo->popup)->border_width * 2; /* FIXME: calc from border_width ... */
231 gtk_widget_size_request (combo->popup, &req1);
232 gtk_widget_size_request (combo->list, &req3);
235 gdk_window_get_origin (GTK_WIDGET (combo->entry)->window, x, y);
237 *height = MIN (COMBO_LIST_MAX_HEIGHT, gdk_screen_height () - *y);
239 if (some_more + req3.width > *width)
240 some_more += 11 + 2 * 2; /* FIXME: get from the scrollbar and scrollbar_spacing */
241 if (some_more + req3.height < *height)
242 *height = some_more + req3.height;
247 gtk_combo_popup_list (GtkButton * button, GtkCombo * combo)
249 gint height, width, x, y;
251 if (!GTK_LIST (combo->list)->children)
253 gtk_combo_get_pos (combo, &x, &y, &height, &width);
255 gtk_widget_set_uposition (combo->popwin, x, y);
256 gtk_widget_set_usize (combo->popwin, width, height);
257 gtk_widget_realize (combo->popwin);
258 gdk_window_set_cursor (combo->popwin->window,
259 gdk_cursor_new (GDK_TOP_LEFT_ARROW));
260 gdk_window_resize (combo->popwin->window, width, height);
261 gtk_widget_show (combo->popwin);
262 gtk_widget_grab_focus (combo->popwin);
263 gtk_grab_add (combo->popwin);
264 gdk_pointer_grab (combo->popwin->window, TRUE,
265 GDK_BUTTON_PRESS_MASK, NULL, NULL, GDK_CURRENT_TIME);
270 prelight_bug (GtkButton * b, GtkCombo * combo)
272 /* avoid prelight state... */
273 gtk_widget_set_state (combo->button, GTK_STATE_NORMAL);
279 gtk_combo_update_entry (GtkList * list, GtkCombo * combo)
283 gtk_grab_remove (GTK_WIDGET (combo));
284 gtk_signal_handler_block (GTK_OBJECT (list), combo->list_change_id);
287 text = gtk_combo_func (GTK_LIST_ITEM (list->selection->data));
290 gtk_entry_set_text (GTK_ENTRY (combo->entry), text);
292 gtk_widget_hide (combo->popwin);
293 gtk_grab_remove (combo->popwin);
294 gdk_pointer_ungrab (GDK_CURRENT_TIME);
295 gtk_signal_handler_unblock (GTK_OBJECT (list), combo->list_change_id);
299 gtk_combo_update_list (GtkEntry * entry, GtkCombo * combo)
301 GtkList *list = GTK_LIST (combo->list);
302 GList *slist = list->selection;
305 gtk_grab_remove (GTK_WIDGET (combo));
307 gtk_signal_handler_block (GTK_OBJECT (entry), combo->entry_change_id);
308 if (slist && slist->data)
309 gtk_list_unselect_child (list, GTK_WIDGET (slist->data));
310 li = gtk_combo_find (combo);
312 gtk_list_select_child (list, GTK_WIDGET (li));
313 gtk_signal_handler_unblock (GTK_OBJECT (entry), combo->entry_change_id);
317 gtk_combo_button_press (GtkWidget * widget, GdkEvent * event, GtkCombo * combo)
321 child = gtk_get_event_widget (event);
323 /* We don't ask for button press events on the grab widget, so
324 * if an event is reported directly to the grab widget, it must
325 * be on a window outside the application (and thus we remove
326 * the popup window). Otherwise, we check if the widget is a child
327 * of the grab widget, and only remove the popup window if it
336 child = child->parent;
340 gtk_widget_hide (combo->popwin);
341 gtk_grab_remove (combo->popwin);
342 gdk_pointer_ungrab (GDK_CURRENT_TIME);
348 gtk_combo_list_key_press (GtkWidget * widget, GdkEventKey * event, GtkCombo * combo)
350 if (event->keyval == GDK_Escape)
352 gtk_widget_hide (combo->popwin);
353 gtk_grab_remove (combo->popwin);
354 gdk_pointer_ungrab (GDK_CURRENT_TIME);
361 gtk_combo_init (GtkCombo * combo)
365 combo->case_sensitive = 0;
366 combo->value_in_list = 0;
367 combo->ok_if_empty = 1;
368 combo->use_arrows = 1;
369 combo->use_arrows_always = 0;
370 combo->entry = gtk_entry_new ();
371 combo->button = gtk_button_new ();
372 arrow = gtk_arrow_new (GTK_ARROW_DOWN, GTK_SHADOW_OUT);
373 gtk_widget_show (arrow);
374 gtk_container_add (GTK_CONTAINER (combo->button), arrow);
375 gtk_box_pack_start (GTK_BOX (combo), combo->entry, TRUE, TRUE, 0);
376 gtk_box_pack_end (GTK_BOX (combo), combo->button, FALSE, FALSE, 0);
377 gtk_widget_show (combo->entry);
378 gtk_widget_show (combo->button);
379 combo->entry_change_id = gtk_signal_connect (GTK_OBJECT (combo->entry), "changed",
380 (GtkSignalFunc) gtk_combo_update_list, combo);
381 gtk_signal_connect (GTK_OBJECT (combo->entry), "key_press_event",
382 (GtkSignalFunc) gtk_combo_entry_key_press, combo);
383 gtk_signal_connect_after (GTK_OBJECT (combo->entry), "focus_out_event",
384 (GtkSignalFunc) gtk_combo_entry_focus_out, combo);
385 gtk_signal_connect (GTK_OBJECT (combo->entry), "activate",
386 (GtkSignalFunc) gtk_combo_popup_list, combo);
387 gtk_signal_connect (GTK_OBJECT (combo->button), "clicked",
388 (GtkSignalFunc) gtk_combo_popup_list, combo);
389 /*gtk_signal_connect(GTK_OBJECT(combo->button), "clicked",
390 (GtkSignalFunc)prelight_bug, combo); */
392 combo->popwin = gtk_window_new (GTK_WINDOW_POPUP);
393 gtk_widget_ref (combo->popwin);
394 gtk_window_set_policy (GTK_WINDOW (combo->popwin), 1, 1, 0);
395 combo->popup = gtk_scrolled_window_new (NULL, NULL);
396 gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (combo->popup),
397 GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
398 combo->list = gtk_list_new ();
399 gtk_list_set_selection_mode(GTK_LIST(combo->list), GTK_SELECTION_BROWSE);
400 gtk_container_add (GTK_CONTAINER (combo->popwin), combo->popup);
401 gtk_container_add (GTK_CONTAINER (combo->popup), combo->list);
402 gtk_widget_show (combo->list);
403 gtk_widget_show (combo->popup);
404 gtk_widget_set_events (combo->popwin, gtk_widget_get_events (combo->popwin) | GDK_KEY_PRESS_MASK);
405 combo->list_change_id = gtk_signal_connect (GTK_OBJECT (combo->list), "selection_changed",
406 (GtkSignalFunc) gtk_combo_update_entry, combo);
407 gtk_signal_connect (GTK_OBJECT (combo->popwin), "key_press_event",
408 (GtkSignalFunc) gtk_combo_list_key_press, combo);
409 gtk_signal_connect (GTK_OBJECT (combo->popwin), "button_press_event",
410 GTK_SIGNAL_FUNC (gtk_combo_button_press), combo);
415 gtk_combo_get_type ()
417 static guint combo_type = 0;
421 GtkTypeInfo combo_info =
425 sizeof (GtkComboClass),
426 (GtkClassInitFunc) gtk_combo_class_init,
427 (GtkObjectInitFunc) gtk_combo_init,
428 (GtkArgSetFunc) NULL,
429 (GtkArgGetFunc) NULL,
431 combo_type = gtk_type_unique (gtk_hbox_get_type (), &combo_info);
439 return GTK_WIDGET (gtk_type_new (gtk_combo_get_type ()));
443 gtk_combo_set_value_in_list (GtkCombo * combo, gint val, gint ok_if_empty)
445 g_return_if_fail (combo != NULL);
446 g_return_if_fail (GTK_IS_COMBO (combo));
448 combo->value_in_list = val;
449 combo->ok_if_empty = ok_if_empty;
453 gtk_combo_set_case_sensitive (GtkCombo * combo, gint val)
455 g_return_if_fail (combo != NULL);
456 g_return_if_fail (GTK_IS_COMBO (combo));
458 combo->case_sensitive = val;
462 gtk_combo_set_use_arrows (GtkCombo * combo, gint val)
464 g_return_if_fail (combo != NULL);
465 g_return_if_fail (GTK_IS_COMBO (combo));
467 combo->use_arrows = val;
471 gtk_combo_set_use_arrows_always (GtkCombo * combo, gint val)
473 g_return_if_fail (combo != NULL);
474 g_return_if_fail (GTK_IS_COMBO (combo));
476 combo->use_arrows_always = val;
477 combo->use_arrows = 1;
481 gtk_combo_set_popdown_strings (GtkCombo * combo, GList * strings)
486 g_return_if_fail (combo != NULL);
487 g_return_if_fail (GTK_IS_COMBO (combo));
488 g_return_if_fail (strings != NULL);
490 gtk_list_clear_items (GTK_LIST (combo->list), 0, -1);
494 li = gtk_list_item_new_with_label ((gchar *) list->data);
495 gtk_widget_show (li);
496 gtk_container_add (GTK_CONTAINER (combo->list), li);
502 gtk_combo_item_destroy (GtkObject * object)
506 key = gtk_object_get_data (object, gtk_combo_string_key);
512 gtk_combo_set_item_string (GtkCombo * combo, GtkItem * item, const gchar * item_value)
517 g_return_if_fail (combo != NULL);
518 g_return_if_fail (GTK_IS_COMBO (combo));
519 g_return_if_fail (item != NULL);
521 val = gtk_object_get_data (GTK_OBJECT (item), gtk_combo_string_key);
529 val = g_strdup(item_value);
530 gtk_object_set_data (GTK_OBJECT (item), gtk_combo_string_key, val);
532 gtk_signal_connect (GTK_OBJECT (item), "destroy",
533 (GtkSignalFunc) gtk_combo_item_destroy, val);
537 gtk_object_set_data (GTK_OBJECT (item), gtk_combo_string_key, NULL);
539 gtk_signal_disconnect_by_data(GTK_OBJECT (item), val);