xref: /haiku/src/kits/interface/MenuItem.cpp (revision 38c7ed7c476e4a985fee9129c8150a85237d362e) 
1 /*
2  * Copyright 2001-2008, Haiku, Inc.
3  * Distributed under the terms of the MIT License.
4  *
5  * Authors:
6  *		Marc Flerackers (mflerackers@androme.be)
7  *		Bill Hayden (haydentech@users.sourceforge.net)
8  *		Stefano Ceccherini (stefano.ceccherini@gmail.com)
9  *		Olivier Milla
10  */
11 
12 //!	Display item for BMenu class
13 
14 #include <ctype.h>
15 #include <stdlib.h>
16 #include <string.h>
17 
18 #include <Bitmap.h>
19 #include <ControlLook.h>
20 #include <MenuItem.h>
21 #include <Shape.h>
22 #include <String.h>
23 #include <Window.h>
24 
25 #include <MenuPrivate.h>
26 
27 #include "utf8_functions.h"
28 
29 
30 const float kLightBGTint = (B_LIGHTEN_1_TINT + B_LIGHTEN_1_TINT + B_NO_TINT) / 3.0;
31 
32 // map control key shortcuts to drawable Unicode characters
33 // cf. http://unicode.org/charts/PDF/U2190.pdf
34 const char *kUTF8ControlMap[] = {
35 	NULL,
36 	"\xe2\x86\xb8", /* B_HOME U+21B8 */
37 	NULL, NULL,
38 	NULL, /* B_END */
39 	NULL, /* B_INSERT */
40 	NULL, NULL,
41 	NULL, /* B_BACKSPACE */
42 	"\xe2\x86\xb9", /* B_TAB U+21B9 */
43 	"\xe2\x86\xb5", /* B_ENTER, U+21B5 */
44 	//"\xe2\x8f\x8e", /* B_ENTER, U+23CE it's the official one */
45 	NULL, /* B_PAGE_UP */
46 	NULL, /* B_PAGE_DOWN */
47 	NULL, NULL, NULL,
48 	NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
49 	NULL, NULL, NULL, NULL,
50 	"\xe2\x86\x90", /* B_LEFT_ARROW */
51 	"\xe2\x86\x92", /* B_RIGHT_ARROW */
52 	"\xe2\x86\x91", /* B_UP_ARROW */
53 	"\xe2\x86\x93", /* B_DOWN_ARROW */
54 };
55 
56 using BPrivate::MenuPrivate;
57 
58 BMenuItem::BMenuItem(const char *label, BMessage *message, char shortcut,
59 					 uint32 modifiers)
60 {
61 	_InitData();
62 	if (label != NULL)
63 		fLabel = strdup(label);
64 
65 	SetMessage(message);
66 
67 	fShortcutChar = shortcut;
68 
69 	if (shortcut != 0)
70 		fModifiers = modifiers | B_COMMAND_KEY;
71 	else
72 		fModifiers = 0;
73 }
74 
75 
76 BMenuItem::BMenuItem(BMenu *menu, BMessage *message)
77 {
78 	_InitData();
79 	SetMessage(message);
80 	_InitMenuData(menu);
81 }
82 
83 
84 BMenuItem::BMenuItem(BMessage *data)
85 {
86 	_InitData();
87 
88 	if (data->HasString("_label")) {
89 		const char *string;
90 
91 		data->FindString("_label", &string);
92 		SetLabel(string);
93 	}
94 
95 	bool disable;
96 	if (data->FindBool("_disable", &disable) == B_OK)
97 		SetEnabled(!disable);
98 
99 	bool marked;
100 	if (data->FindBool("_marked", &marked) == B_OK)
101 		SetMarked(marked);
102 
103 	int32 userTrigger;
104 	if (data->FindInt32("_user_trig", &userTrigger) == B_OK)
105 		SetTrigger(userTrigger);
106 
107 	if (data->HasInt32("_shortcut")) {
108 		int32 shortcut, mods;
109 
110 		data->FindInt32("_shortcut", &shortcut);
111 		data->FindInt32("_mods", &mods);
112 
113 		SetShortcut(shortcut, mods);
114 	}
115 
116 	if (data->HasMessage("_msg")) {
117 		BMessage *msg = new BMessage;
118 		data->FindMessage("_msg", msg);
119 		SetMessage(msg);
120 	}
121 
122 	BMessage subMessage;
123 	if (data->FindMessage("_submenu", &subMessage) == B_OK) {
124 		BArchivable *object = instantiate_object(&subMessage);
125 		if (object != NULL) {
126 			BMenu *menu = dynamic_cast<BMenu *>(object);
127 			if (menu != NULL)
128 				_InitMenuData(menu);
129 		}
130 	}
131 }
132 
133 
134 BArchivable *
135 BMenuItem::Instantiate(BMessage *data)
136 {
137 	if (validate_instantiation(data, "BMenuItem"))
138 		return new BMenuItem(data);
139 
140 	return NULL;
141 }
142 
143 
144 status_t
145 BMenuItem::Archive(BMessage *data, bool deep) const
146 {
147 	status_t ret = BArchivable::Archive(data, deep);
148 
149 	if (ret == B_OK && fLabel)
150 		ret = data->AddString("_label", Label());
151 
152 	if (ret == B_OK && !IsEnabled())
153 		ret = data->AddBool("_disable", true);
154 
155 	if (ret == B_OK && IsMarked())
156 		ret = data->AddBool("_marked", true);
157 
158 	if (ret == B_OK && fUserTrigger)
159 		ret = data->AddInt32("_user_trig", fUserTrigger);
160 
161 	if (ret == B_OK && fShortcutChar) {
162 		ret = data->AddInt32("_shortcut", fShortcutChar);
163 		if (ret == B_OK)
164 			ret = data->AddInt32("_mods", fModifiers);
165 	}
166 
167 	if (ret == B_OK && Message())
168 		ret = data->AddMessage("_msg", Message());
169 
170 	if (ret == B_OK && deep && fSubmenu) {
171 		BMessage submenu;
172 		if (fSubmenu->Archive(&submenu, true) == B_OK)
173 			ret = data->AddMessage("_submenu", &submenu);
174 	}
175 
176 	return ret;
177 }
178 
179 
180 BMenuItem::~BMenuItem()
181 {
182 	free(fLabel);
183 	delete fSubmenu;
184 }
185 
186 
187 void
188 BMenuItem::SetLabel(const char *string)
189 {
190 	if (fLabel != NULL) {
191 		free(fLabel);
192 		fLabel = NULL;
193 	}
194 
195 	if (string != NULL)
196 		fLabel = strdup(string);
197 
198 	if (fSuper != NULL) {
199 		fSuper->InvalidateLayout();
200 
201 		if (fSuper->LockLooper()) {
202 			fSuper->Invalidate();
203 			fSuper->UnlockLooper();
204 		}
205 	}
206 }
207 
208 
209 void
210 BMenuItem::SetEnabled(bool state)
211 {
212 	if (fEnabled == state)
213 		return;
214 
215 	fEnabled = state;
216 
217 	if (fSubmenu != NULL)
218 		fSubmenu->SetEnabled(state);
219 
220 	BMenu *menu = Menu();
221 	if (menu != NULL && menu->LockLooper()) {
222 		menu->Invalidate(fBounds);
223 		menu->UnlockLooper();
224 	}
225 }
226 
227 
228 void
229 BMenuItem::SetMarked(bool state)
230 {
231 	fMark = state;
232 
233 	if (state && Menu() != NULL) {
234 		MenuPrivate priv(Menu());
235 		priv.ItemMarked(this);
236 	}
237 }
238 
239 
240 void
241 BMenuItem::SetTrigger(char trigger)
242 {
243 	fUserTrigger = trigger;
244 
245 	// try uppercase letters first
246 
247 	const char* pos = strchr(Label(), toupper(trigger));
248 	if (pos == NULL) {
249 		// take lowercase, too
250 		pos = strchr(Label(), trigger);
251 	}
252 	if (pos != NULL) {
253 		fTriggerIndex = UTF8CountChars(Label(), pos - Label());
254 		fTrigger = tolower(UTF8ToCharCode(&pos));
255 	} else {
256 		fTrigger = 0;
257 		fTriggerIndex = -1;
258 	}
259 
260 	if (fSuper != NULL)
261 		fSuper->InvalidateLayout();
262 }
263 
264 
265 void
266 BMenuItem::SetShortcut(char ch, uint32 modifiers)
267 {
268 	if (fShortcutChar != 0 && (fModifiers & B_COMMAND_KEY) && fWindow)
269 		fWindow->RemoveShortcut(fShortcutChar, fModifiers);
270 
271 	fShortcutChar = ch;
272 
273 	if (ch != 0)
274 		fModifiers = modifiers | B_COMMAND_KEY;
275 	else
276 		fModifiers = 0;
277 
278 	if (fShortcutChar != 0 && (fModifiers & B_COMMAND_KEY) && fWindow)
279 		fWindow->AddShortcut(fShortcutChar, fModifiers, this);
280 
281 	if (fSuper) {
282 		fSuper->InvalidateLayout();
283 
284 		if (fSuper->LockLooper()) {
285 			fSuper->Invalidate();
286 			fSuper->UnlockLooper();
287 		}
288 	}
289 }
290 
291 
292 const char *
293 BMenuItem::Label() const
294 {
295 	return fLabel;
296 }
297 
298 
299 bool
300 BMenuItem::IsEnabled() const
301 {
302 	if (fSubmenu)
303 		return fSubmenu->IsEnabled();
304 
305 	if (!fEnabled)
306 		return false;
307 
308 	return fSuper ? fSuper->IsEnabled() : true;
309 }
310 
311 
312 bool
313 BMenuItem::IsMarked() const
314 {
315 	return fMark;
316 }
317 
318 
319 char
320 BMenuItem::Trigger() const
321 {
322 	return fUserTrigger;
323 }
324 
325 
326 char
327 BMenuItem::Shortcut(uint32 *modifiers) const
328 {
329 	if (modifiers)
330 		*modifiers = fModifiers;
331 
332 	return fShortcutChar;
333 }
334 
335 
336 BMenu *
337 BMenuItem::Submenu() const
338 {
339 	return fSubmenu;
340 }
341 
342 
343 BMenu *
344 BMenuItem::Menu() const
345 {
346 	return fSuper;
347 }
348 
349 
350 BRect
351 BMenuItem::Frame() const
352 {
353 	return fBounds;
354 }
355 
356 
357 void
358 BMenuItem::GetContentSize(float *width, float *height)
359 {
360 	// TODO: Get rid of this. BMenu should handle this
361 	// automatically. Maybe it's not even needed, since our
362 	// BFont::Height() caches the value locally
363 	MenuPrivate(fSuper).CacheFontInfo();
364 
365 	fCachedWidth = fSuper->StringWidth(fLabel);
366 
367 	if (width)
368 		*width = (float)ceil(fCachedWidth);
369 	if (height) {
370 		*height = MenuPrivate(fSuper).FontHeight();
371 	}
372 }
373 
374 
375 void
376 BMenuItem::TruncateLabel(float maxWidth, char *newLabel)
377 {
378 	BFont font;
379 	BString string(fLabel);
380 
381 	font.TruncateString(&string, B_TRUNCATE_MIDDLE, maxWidth);
382 
383 	string.CopyInto(newLabel, 0, string.Length());
384 	newLabel[string.Length()] = '\0';
385 }
386 
387 
388 void
389 BMenuItem::DrawContent()
390 {
391 	MenuPrivate menuPrivate(fSuper);
392 	menuPrivate.CacheFontInfo();
393 
394 	fSuper->MovePenBy(0, menuPrivate.Ascent());
395 	BPoint lineStart = fSuper->PenLocation();
396 
397 	float labelWidth, labelHeight;
398 	GetContentSize(&labelWidth, &labelHeight);
399 
400 	fSuper->SetDrawingMode(B_OP_OVER);
401 
402 	float frameWidth = fBounds.Width();
403 	if (menuPrivate.State() == MENU_STATE_CLOSED) {
404 		float rightMargin, leftMargin;
405 		menuPrivate.GetItemMargins(&leftMargin, NULL, &rightMargin, NULL);
406 		frameWidth = fSuper->Frame().Width() - (rightMargin + leftMargin);
407 	}
408 
409 	// truncate if needed
410 	if (frameWidth > labelWidth)
411 		fSuper->DrawString(fLabel);
412 	else {
413 		char *truncatedLabel = new char[strlen(fLabel) + 4];
414 		TruncateLabel(frameWidth, truncatedLabel);
415 		fSuper->DrawString(truncatedLabel);
416 		delete[] truncatedLabel;
417 	}
418 
419 	if (fSuper->AreTriggersEnabled() && fTriggerIndex != -1) {
420 		float escapements[fTriggerIndex + 1];
421 		BFont font;
422 		fSuper->GetFont(&font);
423 
424 		font.GetEscapements(fLabel, fTriggerIndex + 1, escapements);
425 
426 		for (int32 i = 0; i < fTriggerIndex; i++)
427 			lineStart.x += escapements[i] * font.Size();
428 
429 		lineStart.x--;
430 		lineStart.y++;
431 
432 		BPoint lineEnd(lineStart);
433 		lineEnd.x += escapements[fTriggerIndex] * font.Size();
434 
435 		fSuper->StrokeLine(lineStart, lineEnd);
436 	}
437 }
438 
439 
440 void
441 BMenuItem::Draw()
442 {
443 	bool enabled = IsEnabled();
444 	bool selected = IsSelected();
445 
446 	rgb_color noTint = fSuper->LowColor();
447 	rgb_color bgColor = noTint;
448 
449 	// set low color and fill background if selected
450 	bool activated = selected && (enabled || Submenu())
451 		/*&& fSuper->fRedrawAfterSticky*/;
452 	if (activated) {
453 		bgColor = tint_color(bgColor, B_DARKEN_3_TINT);
454 		if (be_control_look != NULL) {
455 			BRect rect = Frame();
456 			be_control_look->DrawMenuItemBackground(fSuper, rect, rect,
457 				noTint, BControlLook::B_ACTIVATED);
458 		} else {
459 			fSuper->SetLowColor(bgColor);
460 			fSuper->FillRect(Frame(), B_SOLID_LOW);
461 		}
462 	} else {
463 		fSuper->SetLowColor(bgColor);
464 	}
465 
466 	// set high color
467 	if (be_control_look != NULL) {
468 		if (enabled) {
469 			fSuper->SetHighColor(tint_color(fSuper->LowColor(),
470 				B_DARKEN_MAX_TINT));
471 		} else {
472 			fSuper->SetHighColor(tint_color(fSuper->LowColor(),
473 				B_DISABLED_LABEL_TINT));
474 		}
475 	} else {
476 		if (enabled)
477 			fSuper->SetHighColor(ui_color(B_MENU_ITEM_TEXT_COLOR));
478 		else
479 			fSuper->SetHighColor(tint_color(bgColor, B_DISABLED_LABEL_TINT));
480 	}
481 
482 	// draw content
483 	fSuper->MovePenTo(ContentLocation());
484 	DrawContent();
485 
486 	// draw extra symbols
487 	const menu_layout layout = MenuPrivate(fSuper).Layout();
488 	if (layout == B_ITEMS_IN_COLUMN) {
489 		if (IsMarked())
490 			_DrawMarkSymbol(bgColor);
491 
492 		if (fShortcutChar)
493 			_DrawShortcutSymbol();
494 
495 		if (Submenu())
496 			_DrawSubmenuSymbol(bgColor);
497 	}
498 
499 	fSuper->SetLowColor(noTint);
500 }
501 
502 
503 void
504 BMenuItem::Highlight(bool flag)
505 {
506 	Menu()->Invalidate(Frame());
507 }
508 
509 
510 bool
511 BMenuItem::IsSelected() const
512 {
513 	return fSelected;
514 }
515 
516 
517 BPoint
518 BMenuItem::ContentLocation() const
519 {
520 	const BRect &padding = MenuPrivate(fSuper).Padding();
521 
522 	return BPoint(fBounds.left + padding.left,
523 		fBounds.top + padding.top);
524 }
525 
526 
527 void BMenuItem::_ReservedMenuItem1() {}
528 void BMenuItem::_ReservedMenuItem2() {}
529 void BMenuItem::_ReservedMenuItem3() {}
530 void BMenuItem::_ReservedMenuItem4() {}
531 
532 
533 BMenuItem::BMenuItem(const BMenuItem &)
534 {
535 }
536 
537 
538 BMenuItem &
539 BMenuItem::operator=(const BMenuItem &)
540 {
541 	return *this;
542 }
543 
544 
545 void
546 BMenuItem::_InitData()
547 {
548 	fLabel = NULL;
549 	fSubmenu = NULL;
550 	fWindow = NULL;
551 	fSuper = NULL;
552 	fModifiers = 0;
553 	fCachedWidth = 0;
554 	fTriggerIndex = -1;
555 	fUserTrigger = 0;
556 	fTrigger = 0;
557 	fShortcutChar = 0;
558 	fMark = false;
559 	fEnabled = true;
560 	fSelected = false;
561 }
562 
563 
564 void
565 BMenuItem::_InitMenuData(BMenu *menu)
566 {
567 	fSubmenu = menu;
568 
569 	MenuPrivate(fSubmenu).SetSuperItem(this);
570 
571 	BMenuItem *item = menu->FindMarked();
572 
573 	if (menu->IsRadioMode() && menu->IsLabelFromMarked() && item != NULL)
574 		SetLabel(item->Label());
575 	else
576 		SetLabel(menu->Name());
577 }
578 
579 
580 void
581 BMenuItem::Install(BWindow *window)
582 {
583 	if (fSubmenu) {
584 		MenuPrivate(fSubmenu).Install(window);
585 	}
586 
587 	fWindow = window;
588 
589 	if (fShortcutChar != 0 && (fModifiers & B_COMMAND_KEY) && fWindow)
590 		window->AddShortcut(fShortcutChar, fModifiers, this);
591 
592 	if (!Messenger().IsValid())
593 		SetTarget(window);
594 }
595 
596 
597 status_t
598 BMenuItem::Invoke(BMessage *message)
599 {
600 	if (!IsEnabled())
601 		return B_ERROR;
602 
603 	if (fSuper->IsRadioMode())
604 		SetMarked(true);
605 
606 	bool notify = false;
607 	uint32 kind = InvokeKind(&notify);
608 
609 	BMessage clone(kind);
610 	status_t err = B_BAD_VALUE;
611 
612 	if (!message && !notify)
613 		message = Message();
614 
615 	if (!message) {
616 		if (!fSuper->IsWatched())
617 			return err;
618 	} else
619 		clone = *message;
620 
621 	clone.AddInt32("index", Menu()->IndexOf(this));
622 	clone.AddInt64("when", (int64)system_time());
623 	clone.AddPointer("source", this);
624 	clone.AddMessenger("be:sender", BMessenger(fSuper));
625 
626 	if (message)
627 		err = BInvoker::Invoke(&clone);
628 
629 //	TODO: assynchronous messaging
630 //	SendNotices(kind, &clone);
631 
632 	return err;
633 }
634 
635 
636 void
637 BMenuItem::Uninstall()
638 {
639 	if (fSubmenu != NULL) {
640 		MenuPrivate(fSubmenu).Uninstall();
641 	}
642 
643 	if (Target() == fWindow)
644 		SetTarget(BMessenger());
645 
646 	if (fShortcutChar != 0 && (fModifiers & B_COMMAND_KEY) != 0
647 		&& fWindow != NULL)
648 		fWindow->RemoveShortcut(fShortcutChar, fModifiers);
649 
650 	fWindow = NULL;
651 }
652 
653 
654 void
655 BMenuItem::SetSuper(BMenu *super)
656 {
657 	if (fSuper != NULL && super != NULL)
658 		debugger("Error - can't add menu or menu item to more than 1 container (either menu or menubar).");
659 
660 	if (fSubmenu != NULL) {
661 		MenuPrivate(fSubmenu).SetSuper(super);
662 	}
663 
664 	fSuper = super;
665 }
666 
667 
668 void
669 BMenuItem::Select(bool selected)
670 {
671 	if (fSelected == selected)
672 		return;
673 
674 	if (Submenu() || IsEnabled()) {
675 		fSelected = selected;
676 		Highlight(selected);
677 	}
678 }
679 
680 
681 void
682 BMenuItem::_DrawMarkSymbol(rgb_color bgColor)
683 {
684 	fSuper->PushState();
685 
686 	BRect r(fBounds);
687 	float leftMargin;
688 	MenuPrivate(fSuper).GetItemMargins(&leftMargin, NULL, NULL, NULL);
689 	r.right = r.left + leftMargin - 3;
690 	r.left += 1;
691 
692 	BPoint center(floorf((r.left + r.right) / 2.0),
693 		floorf((r.top + r.bottom) / 2.0));
694 
695 	float size = min_c(r.Height() - 2, r.Width());
696 	r.top = floorf(center.y - size / 2 + 0.5);
697 	r.bottom = floorf(center.y + size / 2 + 0.5);
698 	r.left = floorf(center.x - size / 2 + 0.5);
699 	r.right = floorf(center.x + size / 2 + 0.5);
700 
701 	BShape arrowShape;
702 	center.x += 0.5;
703 	center.y += 0.5;
704 	size *= 0.3;
705 	arrowShape.MoveTo(BPoint(center.x - size, center.y - size * 0.25));
706 	arrowShape.LineTo(BPoint(center.x - size * 0.25, center.y + size));
707 	arrowShape.LineTo(BPoint(center.x + size, center.y - size));
708 
709 	fSuper->SetDrawingMode(B_OP_OVER);
710 	fSuper->SetHighColor(tint_color(bgColor, B_DARKEN_MAX_TINT));
711 	fSuper->SetPenSize(2.0);
712 	// NOTE: StrokeShape() offsets the shape by the current pen position,
713 	// it is not documented in the BeBook, but it is true!
714 	fSuper->MovePenTo(B_ORIGIN);
715 	fSuper->StrokeShape(&arrowShape);
716 
717 	fSuper->PopState();
718 }
719 
720 
721 void
722 BMenuItem::_DrawShortcutSymbol()
723 {
724 	BMenu *menu = Menu();
725 	BFont font;
726 	menu->GetFont(&font);
727 	BPoint where = ContentLocation();
728 	where.x = fBounds.right - font.Size();
729 
730 	if (fSubmenu)
731 		where.x -= fBounds.Height() - 3;
732 
733 	const float ascent = MenuPrivate(fSuper).Ascent();
734 	if (fShortcutChar < B_SPACE && kUTF8ControlMap[(int)fShortcutChar])
735 		_DrawControlChar(fShortcutChar, where + BPoint(0, ascent));
736 	else
737 		fSuper->DrawChar(fShortcutChar, where + BPoint(0, ascent));
738 
739 	where.y += (fBounds.Height() - 11) / 2 - 1;
740 	where.x -= 4;
741 
742 	if (fModifiers & B_COMMAND_KEY) {
743 		const BBitmap *command = MenuPrivate::MenuItemCommand();
744 		const BRect &rect = command->Bounds();
745 		where.x -= rect.Width() + 1;
746 		fSuper->DrawBitmap(command, where);
747 	}
748 
749 	if (fModifiers & B_CONTROL_KEY) {
750 		const BBitmap *control = MenuPrivate::MenuItemControl();
751 		const BRect &rect = control->Bounds();
752 		where.x -= rect.Width() + 1;
753 		fSuper->DrawBitmap(control, where);
754 	}
755 
756 	if (fModifiers & B_OPTION_KEY) {
757 		const BBitmap *option = MenuPrivate::MenuItemOption();
758 		const BRect &rect = option->Bounds();
759 		where.x -= rect.Width() + 1;
760 		fSuper->DrawBitmap(option, where);
761 	}
762 
763 	if (fModifiers & B_SHIFT_KEY) {
764 		const BBitmap *shift = MenuPrivate::MenuItemShift();
765 		const BRect &rect = shift->Bounds();
766 		where.x -= rect.Width() + 1;
767 		fSuper->DrawBitmap(shift, where);
768 	}
769 }
770 
771 
772 void
773 BMenuItem::_DrawSubmenuSymbol(rgb_color bgColor)
774 {
775 	fSuper->PushState();
776 
777 	BRect r(fBounds);
778 	float rightMargin;
779 	MenuPrivate(fSuper).GetItemMargins(NULL, NULL, &rightMargin, NULL);
780 	r.left = r.right - rightMargin + 3;
781 	r.right -= 1;
782 
783 	BPoint center(floorf((r.left + r.right) / 2.0),
784 		floorf((r.top + r.bottom) / 2.0));
785 
786 	float size = min_c(r.Height() - 2, r.Width());
787 	r.top = floorf(center.y - size / 2 + 0.5);
788 	r.bottom = floorf(center.y + size / 2 + 0.5);
789 	r.left = floorf(center.x - size / 2 + 0.5);
790 	r.right = floorf(center.x + size / 2 + 0.5);
791 
792 	BShape arrowShape;
793 	center.x += 0.5;
794 	center.y += 0.5;
795 	size *= 0.25;
796 	float hSize = size * 0.7;
797 	arrowShape.MoveTo(BPoint(center.x - hSize, center.y - size));
798 	arrowShape.LineTo(BPoint(center.x + hSize, center.y));
799 	arrowShape.LineTo(BPoint(center.x - hSize, center.y + size));
800 
801 	fSuper->SetDrawingMode(B_OP_OVER);
802 	fSuper->SetHighColor(tint_color(bgColor, B_DARKEN_MAX_TINT));
803 	fSuper->SetPenSize(ceilf(size * 0.4));
804 	// NOTE: StrokeShape() offsets the shape by the current pen position,
805 	// it is not documented in the BeBook, but it is true!
806 	fSuper->MovePenTo(B_ORIGIN);
807 	fSuper->StrokeShape(&arrowShape);
808 
809 	fSuper->PopState();
810 }
811 
812 
813 void
814 BMenuItem::_DrawControlChar(char shortcut, BPoint where)
815 {
816 	// TODO: If needed, take another font for the control characters
817 	//	(or have font overlays in the app_server!)
818 	const char* symbol = " ";
819 	if (kUTF8ControlMap[(int)fShortcutChar])
820 		symbol = kUTF8ControlMap[(int)fShortcutChar];
821 
822 	fSuper->DrawString(symbol, where);
823 }
824 
825 
826 void
827 BMenuItem::SetAutomaticTrigger(int32 index, uint32 trigger)
828 {
829 	fTriggerIndex = index;
830 	fTrigger = trigger;
831 }
832