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,
54 * gchar *result = g_utf8_strup (text, length);
56 * g_signal_handlers_block_by_func (editable,
57 * (gpointer) insert_text_handler, data);
58 * gtk_editable_insert_text (editable, result, length, position);
59 * g_signal_handlers_unblock_by_func (editable,
60 * (gpointer) insert_text_handler, data);
62 * g_signal_stop_emission_by_name (editable, "insert_text");
73 #include "gtkeditable.h"
74 #include "gtkmarshalers.h"
78 static void gtk_editable_base_init (gpointer g_class);
82 gtk_editable_get_type (void)
84 static GType editable_type = 0;
88 const GTypeInfo editable_info =
90 sizeof (GtkEditableInterface), /* class_size */
91 gtk_editable_base_init, /* base_init */
92 NULL, /* base_finalize */
95 editable_type = g_type_register_static (G_TYPE_INTERFACE, I_("GtkEditable"),
103 gtk_editable_base_init (gpointer g_class)
105 static gboolean initialized = FALSE;
110 * GtkEditable::insert-text:
111 * @editable: the object which received the signal
112 * @new_text: the new text to insert
113 * @new_text_length: the length of the new text, in bytes,
114 * or -1 if new_text is nul-terminated
115 * @position: (inout) (type int): the position, in characters,
116 * at which to insert the new text. this is an in-out
117 * parameter. After the signal emission is finished, it
118 * should point after the newly inserted text.
120 * This signal is emitted when text is inserted into
121 * the widget by the user. The default handler for
122 * this signal will normally be responsible for inserting
123 * the text, so by connecting to this signal and then
124 * stopping the signal with g_signal_stop_emission(), it
125 * is possible to modify the inserted text, or prevent
126 * it from being inserted entirely.
128 g_signal_new (I_("insert-text"),
131 G_STRUCT_OFFSET (GtkEditableInterface, insert_text),
133 _gtk_marshal_VOID__STRING_INT_POINTER,
140 * GtkEditable::delete-text:
141 * @editable: the object which received the signal
142 * @start_pos: the starting position
143 * @end_pos: the end position
145 * This signal is emitted when text is deleted from
146 * the widget by the user. The default handler for
147 * this signal will normally be responsible for deleting
148 * the text, so by connecting to this signal and then
149 * stopping the signal with g_signal_stop_emission(), it
150 * is possible to modify the range of deleted text, or
151 * prevent it from being deleted entirely. The @start_pos
152 * and @end_pos parameters are interpreted as for
153 * gtk_editable_delete_text().
155 g_signal_new (I_("delete-text"),
158 G_STRUCT_OFFSET (GtkEditableInterface, delete_text),
160 _gtk_marshal_VOID__INT_INT,
165 * GtkEditable::changed:
166 * @editable: the object which received the signal
168 * The ::changed signal is emitted at the end of a single
169 * user-visible operation on the contents of the #GtkEditable.
171 * E.g., a paste operation that replaces the contents of the
172 * selection will cause only one signal emission (even though it
173 * is implemented by first deleting the selection, then inserting
174 * the new content, and may cause multiple ::notify::text signals
177 g_signal_new (I_("changed"),
180 G_STRUCT_OFFSET (GtkEditableInterface, changed),
182 _gtk_marshal_VOID__VOID,
190 * gtk_editable_insert_text:
191 * @editable: a #GtkEditable
192 * @new_text: the text to append
193 * @new_text_length: the length of the text in bytes, or -1
194 * @position: (inout): location of the position text will be inserted at
196 * Inserts @new_text_length bytes of @new_text into the contents of the
197 * widget, at position @position.
199 * Note that the position is in characters, not in bytes.
200 * The function updates @position to point after the newly inserted text.
202 * Virtual: do_insert_text
205 gtk_editable_insert_text (GtkEditable *editable,
206 const gchar *new_text,
207 gint new_text_length,
210 g_return_if_fail (GTK_IS_EDITABLE (editable));
211 g_return_if_fail (position != NULL);
213 if (new_text_length < 0)
214 new_text_length = strlen (new_text);
216 GTK_EDITABLE_GET_IFACE (editable)->do_insert_text (editable, new_text, new_text_length, position);
220 * gtk_editable_delete_text:
221 * @editable: a #GtkEditable
222 * @start_pos: start position
223 * @end_pos: end position
225 * Deletes a sequence of characters. The characters that are deleted are
226 * those characters at positions from @start_pos up to, but not including
227 * @end_pos. If @end_pos is negative, then the the characters deleted
228 * are those from @start_pos to the end of the text.
230 * Note that the positions are specified in characters, not bytes.
232 * Virtual: do_delete_text
235 gtk_editable_delete_text (GtkEditable *editable,
239 g_return_if_fail (GTK_IS_EDITABLE (editable));
241 GTK_EDITABLE_GET_IFACE (editable)->do_delete_text (editable, start_pos, end_pos);
245 * gtk_editable_get_chars:
246 * @editable: a #GtkEditable
247 * @start_pos: start of text
248 * @end_pos: end of text
250 * Retrieves a sequence of characters. The characters that are retrieved
251 * are those characters at positions from @start_pos up to, but not
252 * including @end_pos. If @end_pos is negative, then the the characters
253 * retrieved are those characters from @start_pos to the end of the text.
255 * Note that positions are specified in characters, not bytes.
257 * Return value: a pointer to the contents of the widget as a
258 * string. This string is allocated by the #GtkEditable
259 * implementation and should be freed by the caller.
262 gtk_editable_get_chars (GtkEditable *editable,
266 g_return_val_if_fail (GTK_IS_EDITABLE (editable), NULL);
268 return GTK_EDITABLE_GET_IFACE (editable)->get_chars (editable, start_pos, end_pos);
272 * gtk_editable_set_position:
273 * @editable: a #GtkEditable
274 * @position: the position of the cursor
276 * Sets the cursor position in the editable to the given value.
278 * The cursor is displayed before the character with the given (base 0)
279 * index in the contents of the editable. The value must be less than or
280 * equal to the number of characters in the editable. A value of -1
281 * indicates that the position should be set after the last character
282 * of the editable. Note that @position is in characters, not in bytes.
285 gtk_editable_set_position (GtkEditable *editable,
288 g_return_if_fail (GTK_IS_EDITABLE (editable));
290 GTK_EDITABLE_GET_IFACE (editable)->set_position (editable, position);
294 * gtk_editable_get_position:
295 * @editable: a #GtkEditable
297 * Retrieves the current position of the cursor relative to the start
298 * of the content of the editable.
300 * Note that this position is in characters, not in bytes.
302 * Return value: the cursor position
305 gtk_editable_get_position (GtkEditable *editable)
307 g_return_val_if_fail (GTK_IS_EDITABLE (editable), 0);
309 return GTK_EDITABLE_GET_IFACE (editable)->get_position (editable);
313 * gtk_editable_get_selection_bounds:
314 * @editable: a #GtkEditable
315 * @start_pos: (out) (allow-none): location to store the starting position, or %NULL
316 * @end_pos: (out) (allow-none): location to store the end position, or %NULL
318 * Retrieves the selection bound of the editable. start_pos will be filled
319 * with the start of the selection and @end_pos with end. If no text was
320 * selected both will be identical and %FALSE will be returned.
322 * Note that positions are specified in characters, not bytes.
324 * Return value: %TRUE if an area is selected, %FALSE otherwise
327 gtk_editable_get_selection_bounds (GtkEditable *editable,
331 gint tmp_start, tmp_end;
334 g_return_val_if_fail (GTK_IS_EDITABLE (editable), FALSE);
336 result = GTK_EDITABLE_GET_IFACE (editable)->get_selection_bounds (editable, &tmp_start, &tmp_end);
339 *start_pos = MIN (tmp_start, tmp_end);
341 *end_pos = MAX (tmp_start, tmp_end);
347 * gtk_editable_delete_selection:
348 * @editable: a #GtkEditable
350 * Deletes the currently selected text of the editable.
351 * This call doesn't do anything if there is no selected text.
354 gtk_editable_delete_selection (GtkEditable *editable)
358 g_return_if_fail (GTK_IS_EDITABLE (editable));
360 if (gtk_editable_get_selection_bounds (editable, &start, &end))
361 gtk_editable_delete_text (editable, start, end);
365 * gtk_editable_select_region:
366 * @editable: a #GtkEditable
367 * @start_pos: start of region
368 * @end_pos: end of region
370 * Selects a region of text. The characters that are selected are
371 * those characters at positions from @start_pos up to, but not
372 * including @end_pos. If @end_pos is negative, then the the
373 * characters selected are those characters from @start_pos to
374 * the end of the text.
376 * Note that positions are specified in characters, not bytes.
378 * Virtual: set_selection_bounds
381 gtk_editable_select_region (GtkEditable *editable,
385 g_return_if_fail (GTK_IS_EDITABLE (editable));
387 GTK_EDITABLE_GET_IFACE (editable)->set_selection_bounds (editable, start_pos, end_pos);
391 * gtk_editable_cut_clipboard:
392 * @editable: a #GtkEditable
394 * Removes the contents of the currently selected content in the editable and
395 * puts it on the clipboard.
398 gtk_editable_cut_clipboard (GtkEditable *editable)
400 g_return_if_fail (GTK_IS_EDITABLE (editable));
402 g_signal_emit_by_name (editable, "cut-clipboard");
406 * gtk_editable_copy_clipboard:
407 * @editable: a #GtkEditable
409 * Copies the contents of the currently selected content in the editable and
410 * puts it on the clipboard.
413 gtk_editable_copy_clipboard (GtkEditable *editable)
415 g_return_if_fail (GTK_IS_EDITABLE (editable));
417 g_signal_emit_by_name (editable, "copy-clipboard");
421 * gtk_editable_paste_clipboard:
422 * @editable: a #GtkEditable
424 * Pastes the content of the clipboard to the current position of the
425 * cursor in the editable.
428 gtk_editable_paste_clipboard (GtkEditable *editable)
430 g_return_if_fail (GTK_IS_EDITABLE (editable));
432 g_signal_emit_by_name (editable, "paste-clipboard");
436 * gtk_editable_set_editable:
437 * @editable: a #GtkEditable
438 * @is_editable: %TRUE if the user is allowed to edit the text
441 * Determines if the user can edit the text in the editable
445 gtk_editable_set_editable (GtkEditable *editable,
446 gboolean is_editable)
448 g_return_if_fail (GTK_IS_EDITABLE (editable));
450 g_object_set (editable,
451 "editable", is_editable != FALSE,
456 * gtk_editable_get_editable:
457 * @editable: a #GtkEditable
459 * Retrieves whether @editable is editable. See
460 * gtk_editable_set_editable().
462 * Return value: %TRUE if @editable is editable.
465 gtk_editable_get_editable (GtkEditable *editable)
469 g_return_val_if_fail (GTK_IS_EDITABLE (editable), FALSE);
471 g_object_get (editable, "editable", &value, NULL);