1 /* GTK - The GIMP Toolkit
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser 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 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GTK+ Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
29 * @Short_description: Interface for text-editing widgets
32 * The #GtkEditable interface is an interface which should be implemented by
33 * text editing widgets, such as #GtkEntry and #GtkText. It contains functions
34 * for generically manipulating an editable widget, a large number of action
35 * signals used for key bindings, and several signals that an application can
36 * connect to to modify the behavior of a widget.
38 * As an example of the latter usage, by connecting
39 * the following handler to "insert_text", an application
40 * can convert all entry into a widget into uppercase.
43 * <title>Forcing entry to uppercase.</title>
45 * #include <ctype.h>
48 * insert_text_handler (GtkEditable *editable,
49 * const gchar *text,
55 * gchar *result = g_utf8_strup (text, length);
57 * g_signal_handlers_block_by_func (editable,
58 * (gpointer) insert_text_handler, data);
59 * gtk_editable_insert_text (editable, result, length, position);
60 * g_signal_handlers_unblock_by_func (editable,
61 * (gpointer) insert_text_handler, data);
63 * g_signal_stop_emission_by_name (editable, "insert_text");
74 #include "gtkeditable.h"
75 #include "gtkmarshalers.h"
79 static void gtk_editable_base_init (gpointer g_class);
83 gtk_editable_get_type (void)
85 static GType editable_type = 0;
89 const GTypeInfo editable_info =
91 sizeof (GtkEditableInterface), /* class_size */
92 gtk_editable_base_init, /* base_init */
93 NULL, /* base_finalize */
96 editable_type = g_type_register_static (G_TYPE_INTERFACE, I_("GtkEditable"),
100 return editable_type;
104 gtk_editable_base_init (gpointer g_class)
106 static gboolean initialized = FALSE;
111 * GtkEditable::insert-text:
112 * @editable: the object which received the signal
113 * @new_text: the new text to insert
114 * @new_text_length: the length of the new text, in bytes,
115 * or -1 if new_text is nul-terminated
116 * @position: the position, in characters, at which to insert
117 * the new text. this is an in-out parameter.
118 * After the signal emission is finished, it should
119 * point after the newly inserted text.
121 * This signal is emitted when text is inserted into
122 * the widget by the user. The default handler for
123 * this signal will normally be responsible for inserting
124 * the text, so by connecting to this signal and then
125 * stopping the signal with g_signal_stop_emission(), it
126 * is possible to modify the inserted text, or prevent
127 * it from being inserted entirely.
129 g_signal_new (I_("insert-text"),
132 G_STRUCT_OFFSET (GtkEditableInterface, insert_text),
134 _gtk_marshal_VOID__STRING_INT_POINTER,
141 * GtkEditable::delete-text:
142 * @editable: the object which received the signal
143 * @start_pos: the starting position
144 * @end_pos: the end position
146 * This signal is emitted when text is deleted from
147 * the widget by the user. The default handler for
148 * this signal will normally be responsible for deleting
149 * the text, so by connecting to this signal and then
150 * stopping the signal with g_signal_stop_emission(), it
151 * is possible to modify the range of deleted text, or
152 * prevent it from being deleted entirely. The @start_pos
153 * and @end_pos parameters are interpreted as for
154 * gtk_editable_delete_text().
156 g_signal_new (I_("delete-text"),
159 G_STRUCT_OFFSET (GtkEditableInterface, delete_text),
161 _gtk_marshal_VOID__INT_INT,
166 * GtkEditable::changed:
167 * @editable: the object which received the signal
169 * The ::changed signal is emitted at the end of a single
170 * user-visible operation on the contents of the #GtkEditable.
172 * E.g., a paste operation that replaces the contents of the
173 * selection will cause only one signal emission (even though it
174 * is implemented by first deleting the selection, then inserting
175 * the new content, and may cause multiple ::notify::text signals
178 g_signal_new (I_("changed"),
181 G_STRUCT_OFFSET (GtkEditableInterface, changed),
183 _gtk_marshal_VOID__VOID,
191 * gtk_editable_insert_text:
192 * @editable: a #GtkEditable
193 * @new_text: the text to append
194 * @new_text_length: the length of the text in bytes, or -1
195 * @position: (inout): location of the position text will be inserted at
197 * Inserts @new_text_length bytes of @new_text into the contents of the
198 * widget, at position @position.
200 * Note that the position is in characters, not in bytes.
201 * The function updates @position to point after the newly inserted text.
204 gtk_editable_insert_text (GtkEditable *editable,
205 const gchar *new_text,
206 gint new_text_length,
209 g_return_if_fail (GTK_IS_EDITABLE (editable));
210 g_return_if_fail (position != NULL);
212 if (new_text_length < 0)
213 new_text_length = strlen (new_text);
215 GTK_EDITABLE_GET_IFACE (editable)->do_insert_text (editable, new_text, new_text_length, position);
219 * gtk_editable_delete_text:
220 * @editable: a #GtkEditable
221 * @start_pos: start position
222 * @end_pos: end position
224 * Deletes a sequence of characters. The characters that are deleted are
225 * those characters at positions from @start_pos up to, but not including
226 * @end_pos. If @end_pos is negative, then the the characters deleted
227 * are those from @start_pos to the end of the text.
229 * Note that the positions are specified in characters, not bytes.
232 gtk_editable_delete_text (GtkEditable *editable,
236 g_return_if_fail (GTK_IS_EDITABLE (editable));
238 GTK_EDITABLE_GET_IFACE (editable)->do_delete_text (editable, start_pos, end_pos);
242 * gtk_editable_get_chars:
243 * @editable: a #GtkEditable
244 * @start_pos: start of text
245 * @end_pos: end of text
247 * Retrieves a sequence of characters. The characters that are retrieved
248 * are those characters at positions from @start_pos up to, but not
249 * including @end_pos. If @end_pos is negative, then the the characters
250 * retrieved are those characters from @start_pos to the end of the text.
252 * Note that positions are specified in characters, not bytes.
254 * Return value: a pointer to the contents of the widget as a
255 * string. This string is allocated by the #GtkEditable
256 * implementation and should be freed by the caller.
259 gtk_editable_get_chars (GtkEditable *editable,
263 g_return_val_if_fail (GTK_IS_EDITABLE (editable), NULL);
265 return GTK_EDITABLE_GET_IFACE (editable)->get_chars (editable, start_pos, end_pos);
269 * gtk_editable_set_position:
270 * @editable: a #GtkEditable
271 * @position: the position of the cursor
273 * Sets the cursor position in the editable to the given value.
275 * The cursor is displayed before the character with the given (base 0)
276 * index in the contents of the editable. The value must be less than or
277 * equal to the number of characters in the editable. A value of -1
278 * indicates that the position should be set after the last character
279 * of the editable. Note that @position is in characters, not in bytes.
282 gtk_editable_set_position (GtkEditable *editable,
285 g_return_if_fail (GTK_IS_EDITABLE (editable));
287 GTK_EDITABLE_GET_IFACE (editable)->set_position (editable, position);
291 * gtk_editable_get_position:
292 * @editable: a #GtkEditable
294 * Retrieves the current position of the cursor relative to the start
295 * of the content of the editable.
297 * Note that this position is in characters, not in bytes.
299 * Return value: the cursor position
302 gtk_editable_get_position (GtkEditable *editable)
304 g_return_val_if_fail (GTK_IS_EDITABLE (editable), 0);
306 return GTK_EDITABLE_GET_IFACE (editable)->get_position (editable);
310 * gtk_editable_get_selection_bounds:
311 * @editable: a #GtkEditable
312 * @start_pos: (out) (allow-none): location to store the starting position, or %NULL
313 * @end_pos: (out) (allow-none): location to store the end position, or %NULL
315 * Retrieves the selection bound of the editable. start_pos will be filled
316 * with the start of the selection and @end_pos with end. If no text was
317 * selected both will be identical and %FALSE will be returned.
319 * Note that positions are specified in characters, not bytes.
321 * Return value: %TRUE if an area is selected, %FALSE otherwise
324 gtk_editable_get_selection_bounds (GtkEditable *editable,
328 gint tmp_start, tmp_end;
331 g_return_val_if_fail (GTK_IS_EDITABLE (editable), FALSE);
333 result = GTK_EDITABLE_GET_IFACE (editable)->get_selection_bounds (editable, &tmp_start, &tmp_end);
336 *start_pos = MIN (tmp_start, tmp_end);
338 *end_pos = MAX (tmp_start, tmp_end);
344 * gtk_editable_delete_selection:
345 * @editable: a #GtkEditable
347 * Deletes the currently selected text of the editable.
348 * This call doesn't do anything if there is no selected text.
351 gtk_editable_delete_selection (GtkEditable *editable)
355 g_return_if_fail (GTK_IS_EDITABLE (editable));
357 if (gtk_editable_get_selection_bounds (editable, &start, &end))
358 gtk_editable_delete_text (editable, start, end);
362 * gtk_editable_select_region:
363 * @editable: a #GtkEditable
364 * @start_pos: start of region
365 * @end_pos: end of region
367 * Selects a region of text. The characters that are selected are
368 * those characters at positions from @start_pos up to, but not
369 * including @end_pos. If @end_pos is negative, then the the
370 * characters selected are those characters from @start_pos to
371 * the end of the text.
373 * Note that positions are specified in characters, not bytes.
376 gtk_editable_select_region (GtkEditable *editable,
380 g_return_if_fail (GTK_IS_EDITABLE (editable));
382 GTK_EDITABLE_GET_IFACE (editable)->set_selection_bounds (editable, start_pos, end_pos);
386 * gtk_editable_cut_clipboard:
387 * @editable: a #GtkEditable
389 * Removes the contents of the currently selected content in the editable and
390 * puts it on the clipboard.
393 gtk_editable_cut_clipboard (GtkEditable *editable)
395 g_return_if_fail (GTK_IS_EDITABLE (editable));
397 g_signal_emit_by_name (editable, "cut-clipboard");
401 * gtk_editable_copy_clipboard:
402 * @editable: a #GtkEditable
404 * Copies the contents of the currently selected content in the editable and
405 * puts it on the clipboard.
408 gtk_editable_copy_clipboard (GtkEditable *editable)
410 g_return_if_fail (GTK_IS_EDITABLE (editable));
412 g_signal_emit_by_name (editable, "copy-clipboard");
416 * gtk_editable_paste_clipboard:
417 * @editable: a #GtkEditable
419 * Pastes the content of the clipboard to the current position of the
420 * cursor in the editable.
423 gtk_editable_paste_clipboard (GtkEditable *editable)
425 g_return_if_fail (GTK_IS_EDITABLE (editable));
427 g_signal_emit_by_name (editable, "paste-clipboard");
431 * gtk_editable_set_editable:
432 * @editable: a #GtkEditable
433 * @is_editable: %TRUE if the user is allowed to edit the text
436 * Determines if the user can edit the text in the editable
440 gtk_editable_set_editable (GtkEditable *editable,
441 gboolean is_editable)
443 g_return_if_fail (GTK_IS_EDITABLE (editable));
445 g_object_set (editable,
446 "editable", is_editable != FALSE,
451 * gtk_editable_get_editable:
452 * @editable: a #GtkEditable
454 * Retrieves whether @editable is editable. See
455 * gtk_editable_set_editable().
457 * Return value: %TRUE if @editable is editable.
460 gtk_editable_get_editable (GtkEditable *editable)
464 g_return_val_if_fail (GTK_IS_EDITABLE (editable), FALSE);
466 g_object_get (editable, "editable", &value, NULL);