1 /*
2  * This file is part of gtkD.
3  *
4  * gtkD is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License
6  * as published by the Free Software Foundation; either version 3
7  * of the License, or (at your option) any later version, with
8  * some exceptions, please read the COPYING file.
9  *
10  * gtkD 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
13  * GNU Lesser General Public License for more details.
14  *
15  * You should have received a copy of the GNU Lesser General Public License
16  * along with gtkD; if not, write to the Free Software
17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
18  */
19  
20 // generated automatically - do not change
21 // find conversion definition on APILookup.txt
22 // implement new conversion functionalities on the wrap.utils pakage
23 
24 /*
25  * Conversion parameters:
26  * inFile  = GtkAssistant.html
27  * outPack = gtk
28  * outFile = Assistant
29  * strct   = GtkAssistant
30  * realStrct=
31  * ctorStrct=
32  * clss    = Assistant
33  * interf  = 
34  * class Code: No
35  * interface Code: No
36  * template for:
37  * extend  = 
38  * implements:
39  * prefixes:
40  * 	- gtk_assistant_
41  * omit structs:
42  * omit prefixes:
43  * omit code:
44  * omit signals:
45  * imports:
46  * 	- glib.Str
47  * 	- gdk.Pixbuf
48  * 	- gtk.Widget
49  * structWrap:
50  * 	- GdkPixbuf* -> Pixbuf
51  * 	- GtkWidget* -> Widget
52  * module aliases:
53  * local aliases:
54  * overrides:
55  */
56 
57 module gtk.Assistant;
58 
59 public  import gtkc.gtktypes;
60 
61 private import gtkc.gtk;
62 private import glib.ConstructionException;
63 private import gobject.ObjectG;
64 
65 private import gobject.Signals;
66 public  import gtkc.gdktypes;
67 
68 private import glib.Str;
69 private import gdk.Pixbuf;
70 private import gtk.Widget;
71 
72 
73 
74 private import gtk.Window;
75 
76 /**
77  * A GtkAssistant is a widget used to represent a generally complex
78  * operation splitted in several steps, guiding the user through its pages
79  * and controlling the page flow to collect the necessary data.
80  *
81  * The design of GtkAssistant is that it controls what buttons to show and
82  * to make sensitive, based on what it knows about the page sequence and
83  * the type of each page, in
84  * addition to state information like the page
85  * completion and
86  * committed status.
87  *
88  * If you have a case that doesn't quite fit in GtkAssistants way of
89  * handling buttons, you can use the GTK_ASSISTANT_PAGE_CUSTOM page type
90  * and handle buttons yourself.
91  *
92  * GtkAssistant as GtkBuildable
93  *
94  * The GtkAssistant implementation of the GtkBuildable interface exposes the
95  * action_area as internal children with the name "action_area".
96  *
97  * To add pages to an assistant in GtkBuilder, simply add it as a
98  * <child> to the GtkAssistant object, and set its child properties
99  * as necessary.
100  */
101 public class Assistant : Window
102 {
103 	
104 	/** the main Gtk struct */
105 	protected GtkAssistant* gtkAssistant;
106 	
107 	
108 	public GtkAssistant* getAssistantStruct()
109 	{
110 		return gtkAssistant;
111 	}
112 	
113 	
114 	/** the main Gtk struct as a void* */
115 	protected override void* getStruct()
116 	{
117 		return cast(void*)gtkAssistant;
118 	}
119 	
120 	/**
121 	 * Sets our main struct and passes it to the parent class
122 	 */
123 	public this (GtkAssistant* gtkAssistant)
124 	{
125 		super(cast(GtkWindow*)gtkAssistant);
126 		this.gtkAssistant = gtkAssistant;
127 	}
128 	
129 	protected override void setStruct(GObject* obj)
130 	{
131 		super.setStruct(obj);
132 		gtkAssistant = cast(GtkAssistant*)obj;
133 	}
134 	
135 	/**
136 	 */
137 	int[string] connectedSignals;
138 	
139 	void delegate(Assistant)[] onApplyListeners;
140 	/**
141 	 * The ::apply signal is emitted when the apply button is clicked.
142 	 * The default behavior of the GtkAssistant is to switch to the page
143 	 * after the current page, unless the current page is the last one.
144 	 * A handler for the ::apply signal should carry out the actions for
145 	 * which the wizard has collected data. If the action takes a long time
146 	 * to complete, you might consider putting a page of type
147 	 * GTK_ASSISTANT_PAGE_PROGRESS after the confirmation page and handle
148 	 * this operation within the "prepare" signal of the progress
149 	 * page.
150 	 * Since 2.10
151 	 */
152 	void addOnApply(void delegate(Assistant) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
153 	{
154 		if ( !("apply" in connectedSignals) )
155 		{
156 			Signals.connectData(
157 			getStruct(),
158 			"apply",
159 			cast(GCallback)&callBackApply,
160 			cast(void*)this,
161 			null,
162 			connectFlags);
163 			connectedSignals["apply"] = 1;
164 		}
165 		onApplyListeners ~= dlg;
166 	}
167 	extern(C) static void callBackApply(GtkAssistant* assistantStruct, Assistant _assistant)
168 	{
169 		foreach ( void delegate(Assistant) dlg ; _assistant.onApplyListeners )
170 		{
171 			dlg(_assistant);
172 		}
173 	}
174 	
175 	void delegate(Assistant)[] onCancelListeners;
176 	/**
177 	 * The ::cancel signal is emitted when then the cancel button is clicked.
178 	 * Since 2.10
179 	 */
180 	void addOnCancel(void delegate(Assistant) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
181 	{
182 		if ( !("cancel" in connectedSignals) )
183 		{
184 			Signals.connectData(
185 			getStruct(),
186 			"cancel",
187 			cast(GCallback)&callBackCancel,
188 			cast(void*)this,
189 			null,
190 			connectFlags);
191 			connectedSignals["cancel"] = 1;
192 		}
193 		onCancelListeners ~= dlg;
194 	}
195 	extern(C) static void callBackCancel(GtkAssistant* assistantStruct, Assistant _assistant)
196 	{
197 		foreach ( void delegate(Assistant) dlg ; _assistant.onCancelListeners )
198 		{
199 			dlg(_assistant);
200 		}
201 	}
202 	
203 	void delegate(Assistant)[] onCloseListeners;
204 	/**
205 	 * The ::close signal is emitted either when the close button of
206 	 * a summary page is clicked, or when the apply button in the last
207 	 * page in the flow (of type GTK_ASSISTANT_PAGE_CONFIRM) is clicked.
208 	 * Since 2.10
209 	 */
210 	void addOnClose(void delegate(Assistant) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
211 	{
212 		if ( !("close" in connectedSignals) )
213 		{
214 			Signals.connectData(
215 			getStruct(),
216 			"close",
217 			cast(GCallback)&callBackClose,
218 			cast(void*)this,
219 			null,
220 			connectFlags);
221 			connectedSignals["close"] = 1;
222 		}
223 		onCloseListeners ~= dlg;
224 	}
225 	extern(C) static void callBackClose(GtkAssistant* assistantStruct, Assistant _assistant)
226 	{
227 		foreach ( void delegate(Assistant) dlg ; _assistant.onCloseListeners )
228 		{
229 			dlg(_assistant);
230 		}
231 	}
232 	
233 	void delegate(Widget, Assistant)[] onPrepareListeners;
234 	/**
235 	 * The ::prepare signal is emitted when a new page is set as the
236 	 * assistant's current page, before making the new page visible.
237 	 * A handler for this signal can do any preparations which are
238 	 * necessary before showing page.
239 	 * Since 2.10
240 	 */
241 	void addOnPrepare(void delegate(Widget, Assistant) dlg, ConnectFlags connectFlags=cast(ConnectFlags)0)
242 	{
243 		if ( !("prepare" in connectedSignals) )
244 		{
245 			Signals.connectData(
246 			getStruct(),
247 			"prepare",
248 			cast(GCallback)&callBackPrepare,
249 			cast(void*)this,
250 			null,
251 			connectFlags);
252 			connectedSignals["prepare"] = 1;
253 		}
254 		onPrepareListeners ~= dlg;
255 	}
256 	extern(C) static void callBackPrepare(GtkAssistant* assistantStruct, GtkWidget* page, Assistant _assistant)
257 	{
258 		foreach ( void delegate(Widget, Assistant) dlg ; _assistant.onPrepareListeners )
259 		{
260 			dlg(ObjectG.getDObject!(Widget)(page), _assistant);
261 		}
262 	}
263 	
264 	
265 	/**
266 	 * Creates a new GtkAssistant.
267 	 * Since 2.10
268 	 * Throws: ConstructionException GTK+ fails to create the object.
269 	 */
270 	public this ()
271 	{
272 		// GtkWidget * gtk_assistant_new (void);
273 		auto p = gtk_assistant_new();
274 		if(p is null)
275 		{
276 			throw new ConstructionException("null returned by gtk_assistant_new()");
277 		}
278 		this(cast(GtkAssistant*) p);
279 	}
280 	
281 	/**
282 	 * Returns the page number of the current page.
283 	 * Since 2.10
284 	 * Returns: The index (starting from 0) of the current page in the assistant, or -1 if the assistant has no pages, or no current page.
285 	 */
286 	public int getCurrentPage()
287 	{
288 		// gint gtk_assistant_get_current_page (GtkAssistant *assistant);
289 		return gtk_assistant_get_current_page(gtkAssistant);
290 	}
291 	
292 	/**
293 	 * Switches the page to page_num.
294 	 * Note that this will only be necessary in custom buttons,
295 	 * as the assistant flow can be set with
296 	 * gtk_assistant_set_forward_page_func().
297 	 * Since 2.10
298 	 * Params:
299 	 * pageNum = index of the page to switch to, starting from 0.
300 	 * If negative, the last page will be used. If greater
301 	 * than the number of pages in the assistant, nothing
302 	 * will be done.
303 	 */
304 	public void setCurrentPage(int pageNum)
305 	{
306 		// void gtk_assistant_set_current_page (GtkAssistant *assistant,  gint page_num);
307 		gtk_assistant_set_current_page(gtkAssistant, pageNum);
308 	}
309 	
310 	/**
311 	 * Returns the number of pages in the assistant
312 	 * Since 2.10
313 	 * Returns: the number of pages in the assistant
314 	 */
315 	public int getNPages()
316 	{
317 		// gint gtk_assistant_get_n_pages (GtkAssistant *assistant);
318 		return gtk_assistant_get_n_pages(gtkAssistant);
319 	}
320 	
321 	/**
322 	 * Returns the child widget contained in page number page_num.
323 	 * Since 2.10
324 	 * Params:
325 	 * pageNum = the index of a page in the assistant,
326 	 * or -1 to get the last page
327 	 * Returns: the child widget, or NULL if page_num is out of bounds. [transfer none]
328 	 */
329 	public Widget getNthPage(int pageNum)
330 	{
331 		// GtkWidget * gtk_assistant_get_nth_page (GtkAssistant *assistant,  gint page_num);
332 		auto p = gtk_assistant_get_nth_page(gtkAssistant, pageNum);
333 		
334 		if(p is null)
335 		{
336 			return null;
337 		}
338 		
339 		return ObjectG.getDObject!(Widget)(cast(GtkWidget*) p);
340 	}
341 	
342 	/**
343 	 * Prepends a page to the assistant.
344 	 * Since 2.10
345 	 * Params:
346 	 * page = a GtkWidget
347 	 * Returns: the index (starting at 0) of the inserted page
348 	 */
349 	public int prependPage(Widget page)
350 	{
351 		// gint gtk_assistant_prepend_page (GtkAssistant *assistant,  GtkWidget *page);
352 		return gtk_assistant_prepend_page(gtkAssistant, (page is null) ? null : page.getWidgetStruct());
353 	}
354 	
355 	/**
356 	 * Appends a page to the assistant.
357 	 * Since 2.10
358 	 * Params:
359 	 * page = a GtkWidget
360 	 * Returns: the index (starting at 0) of the inserted page
361 	 */
362 	public int appendPage(Widget page)
363 	{
364 		// gint gtk_assistant_append_page (GtkAssistant *assistant,  GtkWidget *page);
365 		return gtk_assistant_append_page(gtkAssistant, (page is null) ? null : page.getWidgetStruct());
366 	}
367 	
368 	/**
369 	 * Inserts a page in the assistant at a given position.
370 	 * Since 2.10
371 	 * Params:
372 	 * page = a GtkWidget
373 	 * position = the index (starting at 0) at which to insert the page,
374 	 * or -1 to append the page to the assistant
375 	 * Returns: the index (starting from 0) of the inserted page
376 	 */
377 	public int insertPage(Widget page, int position)
378 	{
379 		// gint gtk_assistant_insert_page (GtkAssistant *assistant,  GtkWidget *page,  gint position);
380 		return gtk_assistant_insert_page(gtkAssistant, (page is null) ? null : page.getWidgetStruct(), position);
381 	}
382 	
383 	/**
384 	 * Removes the page_num's page from assistant.
385 	 * Params:
386 	 * pageNum = the index of a page in the assistant,
387 	 * or -1 to remove the last page
388 	 * Since 3.2
389 	 */
390 	public void removePage(int pageNum)
391 	{
392 		// void gtk_assistant_remove_page (GtkAssistant *assistant,  gint page_num);
393 		gtk_assistant_remove_page(gtkAssistant, pageNum);
394 	}
395 	
396 	/**
397 	 * Sets the page forwarding function to be page_func.
398 	 * This function will be used to determine what will be
399 	 * the next page when the user presses the forward button.
400 	 * Setting page_func to NULL will make the assistant to
401 	 * use the default forward function, which just goes to the
402 	 * next visible page.
403 	 * Since 2.10
404 	 * Params:
405 	 * pageFunc = the GtkAssistantPageFunc, or NULL
406 	 * to use the default one. [allow-none]
407 	 * data = user data for page_func
408 	 * destroy = destroy notifier for data
409 	 */
410 	public void setForwardPageFunc(GtkAssistantPageFunc pageFunc, void* data, GDestroyNotify destroy)
411 	{
412 		// void gtk_assistant_set_forward_page_func (GtkAssistant *assistant,  GtkAssistantPageFunc page_func,  gpointer data,  GDestroyNotify destroy);
413 		gtk_assistant_set_forward_page_func(gtkAssistant, pageFunc, data, destroy);
414 	}
415 	
416 	/**
417 	 * Sets the page type for page.
418 	 * The page type determines the page behavior in the assistant.
419 	 * Since 2.10
420 	 * Params:
421 	 * page = a page of assistant
422 	 * type = the new type for page
423 	 */
424 	public void setPageType(Widget page, GtkAssistantPageType type)
425 	{
426 		// void gtk_assistant_set_page_type (GtkAssistant *assistant,  GtkWidget *page,  GtkAssistantPageType type);
427 		gtk_assistant_set_page_type(gtkAssistant, (page is null) ? null : page.getWidgetStruct(), type);
428 	}
429 	
430 	/**
431 	 * Gets the page type of page.
432 	 * Since 2.10
433 	 * Params:
434 	 * page = a page of assistant
435 	 * Returns: the page type of page
436 	 */
437 	public GtkAssistantPageType getPageType(Widget page)
438 	{
439 		// GtkAssistantPageType gtk_assistant_get_page_type (GtkAssistant *assistant,  GtkWidget *page);
440 		return gtk_assistant_get_page_type(gtkAssistant, (page is null) ? null : page.getWidgetStruct());
441 	}
442 	
443 	/**
444 	 * Sets a title for page.
445 	 * The title is displayed in the header area of the assistant
446 	 * when page is the current page.
447 	 * Since 2.10
448 	 * Params:
449 	 * page = a page of assistant
450 	 * title = the new title for page
451 	 */
452 	public void setPageTitle(Widget page, string title)
453 	{
454 		// void gtk_assistant_set_page_title (GtkAssistant *assistant,  GtkWidget *page,  const gchar *title);
455 		gtk_assistant_set_page_title(gtkAssistant, (page is null) ? null : page.getWidgetStruct(), Str.toStringz(title));
456 	}
457 	
458 	/**
459 	 * Gets the title for page.
460 	 * Since 2.10
461 	 * Params:
462 	 * page = a page of assistant
463 	 * Returns: the title for page
464 	 */
465 	public string getPageTitle(Widget page)
466 	{
467 		// const gchar * gtk_assistant_get_page_title (GtkAssistant *assistant,  GtkWidget *page);
468 		return Str.toString(gtk_assistant_get_page_title(gtkAssistant, (page is null) ? null : page.getWidgetStruct()));
469 	}
470 	
471 	/**
472 	 * Warning
473 	 * gtk_assistant_set_page_header_image has been deprecated since version 3.2 and should not be used in newly-written code. Since GTK+ 3.2, a header is no longer shown;
474 	 *  add your header decoration to the page content instead.
475 	 * Sets a header image for page.
476 	 * Since 2.10
477 	 * Params:
478 	 * page = a page of assistant
479 	 * pixbuf = the new header image page. [allow-none]
480 	 */
481 	public void setPageHeaderImage(Widget page, Pixbuf pixbuf)
482 	{
483 		// void gtk_assistant_set_page_header_image (GtkAssistant *assistant,  GtkWidget *page,  GdkPixbuf *pixbuf);
484 		gtk_assistant_set_page_header_image(gtkAssistant, (page is null) ? null : page.getWidgetStruct(), (pixbuf is null) ? null : pixbuf.getPixbufStruct());
485 	}
486 	
487 	/**
488 	 * Warning
489 	 * gtk_assistant_get_page_header_image has been deprecated since version 3.2 and should not be used in newly-written code. Since GTK+ 3.2, a header is no longer shown;
490 	 *  add your header decoration to the page content instead.
491 	 * Gets the header image for page.
492 	 * Since 2.10
493 	 * Params:
494 	 * page = a page of assistant
495 	 * Returns: the header image for page, or NULL if there's no header image for the page. [transfer none]
496 	 */
497 	public Pixbuf getPageHeaderImage(Widget page)
498 	{
499 		// GdkPixbuf * gtk_assistant_get_page_header_image (GtkAssistant *assistant,  GtkWidget *page);
500 		auto p = gtk_assistant_get_page_header_image(gtkAssistant, (page is null) ? null : page.getWidgetStruct());
501 		
502 		if(p is null)
503 		{
504 			return null;
505 		}
506 		
507 		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p);
508 	}
509 	
510 	/**
511 	 * Warning
512 	 * gtk_assistant_set_page_side_image has been deprecated since version 3.2 and should not be used in newly-written code. Since GTK+ 3.2, sidebar images are not
513 	 *  shown anymore.
514 	 * Sets a side image for page.
515 	 * This image used to be displayed in the side area of the assistant
516 	 * when page is the current page.
517 	 * Since 2.10
518 	 * Params:
519 	 * page = a page of assistant
520 	 * pixbuf = the new side image page. [allow-none]
521 	 */
522 	public void setPageSideImage(Widget page, Pixbuf pixbuf)
523 	{
524 		// void gtk_assistant_set_page_side_image (GtkAssistant *assistant,  GtkWidget *page,  GdkPixbuf *pixbuf);
525 		gtk_assistant_set_page_side_image(gtkAssistant, (page is null) ? null : page.getWidgetStruct(), (pixbuf is null) ? null : pixbuf.getPixbufStruct());
526 	}
527 	
528 	/**
529 	 * Warning
530 	 * gtk_assistant_get_page_side_image has been deprecated since version 3.2 and should not be used in newly-written code. Since GTK+ 3.2, sidebar images are not
531 	 *  shown anymore.
532 	 * Gets the side image for page.
533 	 * Since 2.10
534 	 * Params:
535 	 * page = a page of assistant
536 	 * Returns: the side image for page, or NULL if there's no side image for the page. [transfer none]
537 	 */
538 	public Pixbuf getPageSideImage(Widget page)
539 	{
540 		// GdkPixbuf * gtk_assistant_get_page_side_image (GtkAssistant *assistant,  GtkWidget *page);
541 		auto p = gtk_assistant_get_page_side_image(gtkAssistant, (page is null) ? null : page.getWidgetStruct());
542 		
543 		if(p is null)
544 		{
545 			return null;
546 		}
547 		
548 		return ObjectG.getDObject!(Pixbuf)(cast(GdkPixbuf*) p);
549 	}
550 	
551 	/**
552 	 * Sets whether page contents are complete.
553 	 * This will make assistant update the buttons state
554 	 * to be able to continue the task.
555 	 * Since 2.10
556 	 * Params:
557 	 * page = a page of assistant
558 	 * complete = the completeness status of the page
559 	 */
560 	public void setPageComplete(Widget page, int complete)
561 	{
562 		// void gtk_assistant_set_page_complete (GtkAssistant *assistant,  GtkWidget *page,  gboolean complete);
563 		gtk_assistant_set_page_complete(gtkAssistant, (page is null) ? null : page.getWidgetStruct(), complete);
564 	}
565 	
566 	/**
567 	 * Gets whether page is complete.
568 	 * Since 2.10
569 	 * Params:
570 	 * page = a page of assistant
571 	 * Returns: TRUE if page is complete.
572 	 */
573 	public int getPageComplete(Widget page)
574 	{
575 		// gboolean gtk_assistant_get_page_complete (GtkAssistant *assistant,  GtkWidget *page);
576 		return gtk_assistant_get_page_complete(gtkAssistant, (page is null) ? null : page.getWidgetStruct());
577 	}
578 	
579 	/**
580 	 * Adds a widget to the action area of a GtkAssistant.
581 	 * Since 2.10
582 	 * Params:
583 	 * child = a GtkWidget
584 	 */
585 	public void addActionWidget(Widget child)
586 	{
587 		// void gtk_assistant_add_action_widget (GtkAssistant *assistant,  GtkWidget *child);
588 		gtk_assistant_add_action_widget(gtkAssistant, (child is null) ? null : child.getWidgetStruct());
589 	}
590 	
591 	/**
592 	 * Removes a widget from the action area of a GtkAssistant.
593 	 * Since 2.10
594 	 * Params:
595 	 * child = a GtkWidget
596 	 */
597 	public void removeActionWidget(Widget child)
598 	{
599 		// void gtk_assistant_remove_action_widget (GtkAssistant *assistant,  GtkWidget *child);
600 		gtk_assistant_remove_action_widget(gtkAssistant, (child is null) ? null : child.getWidgetStruct());
601 	}
602 	
603 	/**
604 	 * Forces assistant to recompute the buttons state.
605 	 * GTK+ automatically takes care of this in most situations,
606 	 * e.g. when the user goes to a different page, or when the
607 	 * visibility or completeness of a page changes.
608 	 * One situation where it can be necessary to call this
609 	 * function is when changing a value on the current page
610 	 * affects the future page flow of the assistant.
611 	 * Since 2.10
612 	 */
613 	public void updateButtonsState()
614 	{
615 		// void gtk_assistant_update_buttons_state (GtkAssistant *assistant);
616 		gtk_assistant_update_buttons_state(gtkAssistant);
617 	}
618 	
619 	/**
620 	 * Erases the visited page history so the back button is not
621 	 * shown on the current page, and removes the cancel button
622 	 * from subsequent pages.
623 	 * Use this when the information provided up to the current
624 	 * page is hereafter deemed permanent and cannot be modified
625 	 * or undone. For example, showing a progress page to track
626 	 * a long-running, unreversible operation after the user has
627 	 * clicked apply on a confirmation page.
628 	 * Since 2.22
629 	 */
630 	public void commit()
631 	{
632 		// void gtk_assistant_commit (GtkAssistant *assistant);
633 		gtk_assistant_commit(gtkAssistant);
634 	}
635 	
636 	/**
637 	 * Navigate to the next page.
638 	 * It is a programming error to call this function when
639 	 * there is no next page.
640 	 * This function is for use when creating pages of the
641 	 * GTK_ASSISTANT_PAGE_CUSTOM type.
642 	 */
643 	public void nextPage()
644 	{
645 		// void gtk_assistant_next_page (GtkAssistant *assistant);
646 		gtk_assistant_next_page(gtkAssistant);
647 	}
648 	
649 	/**
650 	 * Navigate to the previous visited page.
651 	 * It is a programming error to call this function when
652 	 * no previous page is available.
653 	 * This function is for use when creating pages of the
654 	 * GTK_ASSISTANT_PAGE_CUSTOM type.
655 	 * Since 2.10
656 	 */
657 	public void previousPage()
658 	{
659 		// void gtk_assistant_previous_page (GtkAssistant *assistant);
660 		gtk_assistant_previous_page(gtkAssistant);
661 	}
662 }