xref: /haiku/src/kits/interface/MenuField.cpp (revision e5d65858f2361fe0552495b61620c84dcee6bc00)
1 /*
2  * Copyright 2001-2013, Haiku, Inc.
3  * Distributed under the terms of the MIT License.
4  *
5  * Authors:
6  *		Marc Flerackers (mflerackers@androme.be)
7  *		Stephan Aßmus <superstippi@gmx.de>
8  *		Ingo Weinhold <bonefish@cs.tu-berlin.de>
9  */
10 
11 
12 #include <MenuField.h>
13 
14 #include <stdlib.h>
15 #include <string.h>
16 
17 #include <AbstractLayoutItem.h>
18 #include <ControlLook.h>
19 #include <LayoutUtils.h>
20 #include <MenuBar.h>
21 #include <Message.h>
22 #include <BMCPrivate.h>
23 #include <Window.h>
24 
25 #include <binary_compatibility/Interface.h>
26 #include <binary_compatibility/Support.h>
27 
28 
29 //#define TRACE_MENU_FIELD
30 #ifdef TRACE_MENU_FIELD
31 #	include <FunctionTracer.h>
32 	static int32 sFunctionDepth = -1;
33 #	define CALLED(x...)	FunctionTracer _ft("BMenuField", __FUNCTION__, \
34 							sFunctionDepth)
35 #	define TRACE(x...)	{ BString _to; \
36 							_to.Append(' ', (sFunctionDepth + 1) * 2); \
37 							printf("%s", _to.String()); printf(x); }
38 #else
39 #	define CALLED(x...)
40 #	define TRACE(x...)
41 #endif
42 
43 
44 namespace {
45 	const char* const kFrameField = "BMenuField:layoutItem:frame";
46 	const char* const kMenuBarItemField = "BMenuField:barItem";
47 	const char* const kLabelItemField = "BMenuField:labelItem";
48 }
49 
50 
51 class BMenuField::LabelLayoutItem : public BAbstractLayoutItem {
52 public:
53 								LabelLayoutItem(BMenuField* parent);
54 								LabelLayoutItem(BMessage* archive);
55 
56 	virtual	bool				IsVisible();
57 	virtual	void				SetVisible(bool visible);
58 
59 	virtual	BRect				Frame();
60 	virtual	void				SetFrame(BRect frame);
61 
62 			void				SetParent(BMenuField* parent);
63 	virtual	BView*				View();
64 
65 	virtual	BSize				BaseMinSize();
66 	virtual	BSize				BaseMaxSize();
67 	virtual	BSize				BasePreferredSize();
68 	virtual	BAlignment			BaseAlignment();
69 
70 	virtual status_t			Archive(BMessage* into, bool deep = true) const;
71 	static	BArchivable*		Instantiate(BMessage* from);
72 
73 private:
74 			BMenuField*			fParent;
75 			BRect				fFrame;
76 };
77 
78 
79 class BMenuField::MenuBarLayoutItem : public BAbstractLayoutItem {
80 public:
81 								MenuBarLayoutItem(BMenuField* parent);
82 								MenuBarLayoutItem(BMessage* from);
83 
84 	virtual	bool				IsVisible();
85 	virtual	void				SetVisible(bool visible);
86 
87 	virtual	BRect				Frame();
88 	virtual	void				SetFrame(BRect frame);
89 
90 			void				SetParent(BMenuField* parent);
91 	virtual	BView*				View();
92 
93 	virtual	BSize				BaseMinSize();
94 	virtual	BSize				BaseMaxSize();
95 	virtual	BSize				BasePreferredSize();
96 	virtual	BAlignment			BaseAlignment();
97 
98 	virtual status_t			Archive(BMessage* into, bool deep = true) const;
99 	static	BArchivable*		Instantiate(BMessage* from);
100 
101 private:
102 			BMenuField*			fParent;
103 			BRect				fFrame;
104 };
105 
106 
107 struct BMenuField::LayoutData {
108 	LayoutData()
109 		:
110 		label_layout_item(NULL),
111 		menu_bar_layout_item(NULL),
112 		previous_height(-1),
113 		valid(false)
114 	{
115 	}
116 
117 	LabelLayoutItem*	label_layout_item;
118 	MenuBarLayoutItem*	menu_bar_layout_item;
119 	float				previous_height;	// used in FrameResized() for
120 											// invalidation
121 	font_height			font_info;
122 	float				label_width;
123 	float				label_height;
124 	BSize				min;
125 	BSize				menu_bar_min;
126 	bool				valid;
127 };
128 
129 
130 // #pragma mark -
131 
132 
133 static float kVMargin = 2.0f;
134 
135 
136 BMenuField::BMenuField(BRect frame, const char* name, const char* label,
137 		BMenu* menu, uint32 resize, uint32 flags)
138 	:
139 	BView(frame, name, resize, flags)
140 {
141 	CALLED();
142 
143 	TRACE("frame.width: %.2f, height: %.2f\n", frame.Width(), frame.Height());
144 
145 	InitObject(label);
146 
147 	frame.OffsetTo(B_ORIGIN);
148 	_InitMenuBar(menu, frame, false);
149 
150 	InitObject2();
151 }
152 
153 
154 BMenuField::BMenuField(BRect frame, const char* name, const char* label,
155 		BMenu* menu, bool fixedSize, uint32 resize, uint32 flags)
156 	:
157 	BView(frame, name, resize, flags)
158 {
159 	InitObject(label);
160 
161 	fFixedSizeMB = fixedSize;
162 
163 	frame.OffsetTo(B_ORIGIN);
164 	_InitMenuBar(menu, frame, fixedSize);
165 
166 	InitObject2();
167 }
168 
169 
170 BMenuField::BMenuField(const char* name, const char* label, BMenu* menu,
171 		uint32 flags)
172 	:
173 	BView(name, flags | B_FRAME_EVENTS)
174 {
175 	InitObject(label);
176 
177 	_InitMenuBar(menu, BRect(0, 0, 100, 15), true);
178 
179 	InitObject2();
180 }
181 
182 
183 BMenuField::BMenuField(const char* label, BMenu* menu, uint32 flags)
184 	:
185 	BView(NULL, flags | B_FRAME_EVENTS)
186 {
187 	InitObject(label);
188 
189 	_InitMenuBar(menu, BRect(0, 0, 100, 15), true);
190 
191 	InitObject2();
192 }
193 
194 
195 //! Copy&Paste error, should be removed at some point (already private)
196 BMenuField::BMenuField(const char* name, const char* label, BMenu* menu,
197 		BMessage* message, uint32 flags)
198 	:
199 	BView(name, flags | B_FRAME_EVENTS)
200 {
201 	InitObject(label);
202 
203 	_InitMenuBar(menu, BRect(0, 0, 100, 15), true);
204 
205 	InitObject2();
206 }
207 
208 
209 //! Copy&Paste error, should be removed at some point (already private)
210 BMenuField::BMenuField(const char* label, BMenu* menu, BMessage* message)
211 	:
212 	BView(NULL, B_WILL_DRAW | B_NAVIGABLE | B_FRAME_EVENTS)
213 {
214 	InitObject(label);
215 
216 	_InitMenuBar(menu, BRect(0, 0, 100, 15), true);
217 
218 	InitObject2();
219 }
220 
221 
222 BMenuField::BMenuField(BMessage* data)
223 	:
224 	BView(BUnarchiver::PrepareArchive(data))
225 {
226 	BUnarchiver unarchiver(data);
227 	const char* label = NULL;
228 	data->FindString("_label", &label);
229 
230 	InitObject(label);
231 
232 	data->FindFloat("_divide", &fDivider);
233 
234 	int32 align;
235 	if (data->FindInt32("_align", &align) == B_OK)
236 		SetAlignment((alignment)align);
237 
238 	if (!BUnarchiver::IsArchiveManaged(data))
239 		_InitMenuBar(data);
240 	unarchiver.Finish();
241 }
242 
243 
244 BMenuField::~BMenuField()
245 {
246 	free(fLabel);
247 
248 	status_t dummy;
249 	if (fMenuTaskID >= 0)
250 		wait_for_thread(fMenuTaskID, &dummy);
251 
252 	delete fLayoutData;
253 }
254 
255 
256 BArchivable*
257 BMenuField::Instantiate(BMessage* data)
258 {
259 	if (validate_instantiation(data, "BMenuField"))
260 		return new BMenuField(data);
261 
262 	return NULL;
263 }
264 
265 
266 status_t
267 BMenuField::Archive(BMessage* data, bool deep) const
268 {
269 	BArchiver archiver(data);
270 	status_t ret = BView::Archive(data, deep);
271 
272 	if (ret == B_OK && Label())
273 		ret = data->AddString("_label", Label());
274 
275 	if (ret == B_OK && !IsEnabled())
276 		ret = data->AddBool("_disable", true);
277 
278 	if (ret == B_OK)
279 		ret = data->AddInt32("_align", Alignment());
280 	if (ret == B_OK)
281 		ret = data->AddFloat("_divide", Divider());
282 
283 	if (ret == B_OK && fFixedSizeMB)
284 		ret = data->AddBool("be:fixeds", true);
285 
286 	bool dmark = false;
287 	if (_BMCMenuBar_* menuBar = dynamic_cast<_BMCMenuBar_*>(fMenuBar))
288 		dmark = menuBar->IsPopUpMarkerShown();
289 
290 	data->AddBool("be:dmark", dmark);
291 
292 	return archiver.Finish(ret);
293 }
294 
295 
296 status_t
297 BMenuField::AllArchived(BMessage* into) const
298 {
299 	status_t err;
300 	if ((err = BView::AllArchived(into)) != B_OK)
301 		return err;
302 
303 	BArchiver archiver(into);
304 
305 	BArchivable* menuBarItem = fLayoutData->menu_bar_layout_item;
306 	if (archiver.IsArchived(menuBarItem))
307 		err = archiver.AddArchivable(kMenuBarItemField, menuBarItem);
308 
309 	if (err != B_OK)
310 		return err;
311 
312 	BArchivable* labelBarItem = fLayoutData->label_layout_item;
313 	if (archiver.IsArchived(labelBarItem))
314 		err = archiver.AddArchivable(kLabelItemField, labelBarItem);
315 
316 	return err;
317 }
318 
319 
320 status_t
321 BMenuField::AllUnarchived(const BMessage* from)
322 {
323 	BUnarchiver unarchiver(from);
324 
325 	status_t err = B_OK;
326 	if ((err = BView::AllUnarchived(from)) != B_OK)
327 		return err;
328 
329 	_InitMenuBar(from);
330 
331 	if (unarchiver.IsInstantiated(kMenuBarItemField)) {
332 		MenuBarLayoutItem*& menuItem = fLayoutData->menu_bar_layout_item;
333 		err = unarchiver.FindObject(kMenuBarItemField,
334 			BUnarchiver::B_DONT_ASSUME_OWNERSHIP, menuItem);
335 
336 		if (err == B_OK)
337 			menuItem->SetParent(this);
338 		else
339 			return err;
340 	}
341 
342 	if (unarchiver.IsInstantiated(kLabelItemField)) {
343 		LabelLayoutItem*& labelItem = fLayoutData->label_layout_item;
344 		err = unarchiver.FindObject(kLabelItemField,
345 			BUnarchiver::B_DONT_ASSUME_OWNERSHIP, labelItem);
346 
347 		if (err == B_OK)
348 			labelItem->SetParent(this);
349 	}
350 
351 	return err;
352 }
353 
354 
355 void
356 BMenuField::Draw(BRect update)
357 {
358 	BRect bounds(Bounds());
359 	bool active = IsFocus() && Window()->IsActive();
360 
361 	DrawLabel(bounds, update);
362 
363 	BRect frame(fMenuBar->Frame());
364 
365 	frame.InsetBy(-kVMargin, -kVMargin);
366 	rgb_color base = fMenuBar->LowColor();
367 	rgb_color background = LowColor();
368 	uint32 flags = 0;
369 	if (!fMenuBar->IsEnabled())
370 		flags |= BControlLook::B_DISABLED;
371 	if (active)
372 		flags |= BControlLook::B_FOCUSED;
373 	be_control_look->DrawMenuFieldFrame(this, frame, update, base,
374 		background, flags);
375 }
376 
377 
378 void
379 BMenuField::AttachedToWindow()
380 {
381 	CALLED();
382 	rgb_color color;
383 
384 	BView* parent = Parent();
385 	if (parent != NULL) {
386 		// inherit the color from parent
387 		color = parent->ViewColor();
388 		if (color == B_TRANSPARENT_COLOR)
389 			color = ui_color(B_PANEL_BACKGROUND_COLOR);
390 	} else
391 		color = ui_color(B_PANEL_BACKGROUND_COLOR);
392 
393 	SetViewColor(color);
394 	SetLowColor(color);
395 }
396 
397 
398 void
399 BMenuField::AllAttached()
400 {
401 	CALLED();
402 
403 	TRACE("width: %.2f, height: %.2f\n", Frame().Width(), Frame().Height());
404 
405 	ResizeTo(Bounds().Width(),
406 		fMenuBar->Bounds().Height() + kVMargin + kVMargin);
407 
408 	TRACE("width: %.2f, height: %.2f\n", Frame().Width(), Frame().Height());
409 }
410 
411 
412 void
413 BMenuField::MouseDown(BPoint where)
414 {
415 	if (!fMenuBar->Frame().Contains(where))
416 		return;
417 
418 	if (!fMenuBar->IsEnabled())
419 		return;
420 
421 	BRect bounds = fMenuBar->ConvertFromParent(Bounds());
422 
423 	fMenuBar->StartMenuBar(-1, false, true, &bounds);
424 
425 	fMenuTaskID = spawn_thread((thread_func)_thread_entry,
426 			 	"_m_task_", B_NORMAL_PRIORITY, this);
427 	if (fMenuTaskID >= 0)
428 		resume_thread(fMenuTaskID);
429 }
430 
431 
432 void
433 BMenuField::KeyDown(const char* bytes, int32 numBytes)
434 {
435 	switch (bytes[0]) {
436 		case B_SPACE:
437 		case B_RIGHT_ARROW:
438 		case B_DOWN_ARROW:
439 		{
440 			if (!IsEnabled())
441 				break;
442 
443 			BRect bounds = fMenuBar->ConvertFromParent(Bounds());
444 
445 			fMenuBar->StartMenuBar(0, true, true, &bounds);
446 
447 			fSelected = true;
448 			fTransition = true;
449 
450 			bounds = Bounds();
451 			bounds.right = fDivider;
452 
453 			Invalidate(bounds);
454 		}
455 
456 		default:
457 			BView::KeyDown(bytes, numBytes);
458 	}
459 }
460 
461 
462 void
463 BMenuField::MakeFocus(bool state)
464 {
465 	if (IsFocus() == state)
466 		return;
467 
468 	BView::MakeFocus(state);
469 
470 	if (Window())
471 		Invalidate(); // TODO: use fLayoutData->label_width
472 }
473 
474 
475 void
476 BMenuField::MessageReceived(BMessage* msg)
477 {
478 	BView::MessageReceived(msg);
479 }
480 
481 
482 void
483 BMenuField::WindowActivated(bool state)
484 {
485 	BView::WindowActivated(state);
486 
487 	if (IsFocus())
488 		Invalidate();
489 }
490 
491 
492 void
493 BMenuField::MouseUp(BPoint point)
494 {
495 	BView::MouseUp(point);
496 }
497 
498 
499 void
500 BMenuField::MouseMoved(BPoint point, uint32 code, const BMessage* message)
501 {
502 	BView::MouseMoved(point, code, message);
503 }
504 
505 
506 void
507 BMenuField::DetachedFromWindow()
508 {
509 	BView::DetachedFromWindow();
510 }
511 
512 
513 void
514 BMenuField::AllDetached()
515 {
516 	BView::AllDetached();
517 }
518 
519 
520 void
521 BMenuField::FrameMoved(BPoint newPosition)
522 {
523 	BView::FrameMoved(newPosition);
524 }
525 
526 
527 void
528 BMenuField::FrameResized(float newWidth, float newHeight)
529 {
530 	BView::FrameResized(newWidth, newHeight);
531 
532 	if (newHeight != fLayoutData->previous_height && Label()) {
533 		// The height changed, which means the label has to move and we
534 		// probably also invalidate a part of the borders around the menu bar.
535 		// So don't be shy and invalidate the whole thing.
536 		Invalidate();
537 	}
538 
539 	fLayoutData->previous_height = newHeight;
540 }
541 
542 
543 BMenu*
544 BMenuField::Menu() const
545 {
546 	return fMenu;
547 }
548 
549 
550 BMenuBar*
551 BMenuField::MenuBar() const
552 {
553 	return fMenuBar;
554 }
555 
556 
557 BMenuItem*
558 BMenuField::MenuItem() const
559 {
560 	return fMenuBar->ItemAt(0);
561 }
562 
563 
564 void
565 BMenuField::SetLabel(const char* label)
566 {
567 	if (fLabel) {
568 		if (label && strcmp(fLabel, label) == 0)
569 			return;
570 
571 		free(fLabel);
572 	}
573 
574 	fLabel = strdup(label);
575 
576 	if (Window())
577 		Invalidate();
578 
579 	InvalidateLayout();
580 }
581 
582 
583 const char*
584 BMenuField::Label() const
585 {
586 	return fLabel;
587 }
588 
589 
590 void
591 BMenuField::SetEnabled(bool on)
592 {
593 	if (fEnabled == on)
594 		return;
595 
596 	fEnabled = on;
597 	fMenuBar->SetEnabled(on);
598 
599 	if (Window()) {
600 		fMenuBar->Invalidate(fMenuBar->Bounds());
601 		Invalidate(Bounds());
602 	}
603 }
604 
605 
606 bool
607 BMenuField::IsEnabled() const
608 {
609 	return fEnabled;
610 }
611 
612 
613 void
614 BMenuField::SetAlignment(alignment label)
615 {
616 	fAlign = label;
617 }
618 
619 
620 alignment
621 BMenuField::Alignment() const
622 {
623 	return fAlign;
624 }
625 
626 
627 void
628 BMenuField::SetDivider(float divider)
629 {
630 	divider = floorf(divider + 0.5);
631 
632 	float dx = fDivider - divider;
633 
634 	if (dx == 0.0f)
635 		return;
636 
637 	fDivider = divider;
638 
639 	if (Flags() & B_SUPPORTS_LAYOUT) {
640 		// We should never get here, since layout support means, we also
641 		// layout the divider, and don't use this method at all.
642 		Relayout();
643 	} else {
644 		BRect dirty(fMenuBar->Frame());
645 
646 		fMenuBar->MoveTo(_MenuBarOffset(), kVMargin);
647 
648 		if (fFixedSizeMB)
649 			fMenuBar->ResizeTo(_MenuBarWidth(), dirty.Height());
650 
651 		dirty = dirty | fMenuBar->Frame();
652 		dirty.InsetBy(-kVMargin, -kVMargin);
653 
654 		Invalidate(dirty);
655 	}
656 }
657 
658 
659 float
660 BMenuField::Divider() const
661 {
662 	return fDivider;
663 }
664 
665 
666 void
667 BMenuField::ShowPopUpMarker()
668 {
669 	if (_BMCMenuBar_* menuBar = dynamic_cast<_BMCMenuBar_*>(fMenuBar)) {
670 		menuBar->TogglePopUpMarker(true);
671 		menuBar->Invalidate();
672 	}
673 }
674 
675 
676 void
677 BMenuField::HidePopUpMarker()
678 {
679 	if (_BMCMenuBar_* menuBar = dynamic_cast<_BMCMenuBar_*>(fMenuBar)) {
680 		menuBar->TogglePopUpMarker(false);
681 		menuBar->Invalidate();
682 	}
683 }
684 
685 
686 BHandler*
687 BMenuField::ResolveSpecifier(BMessage* message, int32 index,
688 	BMessage* specifier, int32 form, const char* property)
689 {
690 	return BView::ResolveSpecifier(message, index, specifier, form, property);
691 }
692 
693 
694 status_t
695 BMenuField::GetSupportedSuites(BMessage* data)
696 {
697 	return BView::GetSupportedSuites(data);
698 }
699 
700 
701 void
702 BMenuField::ResizeToPreferred()
703 {
704 	CALLED();
705 
706 	TRACE("fMenuBar->Frame().width: %.2f, height: %.2f\n",
707 		fMenuBar->Frame().Width(), fMenuBar->Frame().Height());
708 
709 	fMenuBar->ResizeToPreferred();
710 
711 	TRACE("fMenuBar->Frame().width: %.2f, height: %.2f\n",
712 		fMenuBar->Frame().Width(), fMenuBar->Frame().Height());
713 
714 	BView::ResizeToPreferred();
715 
716 	if (fFixedSizeMB) {
717 		// we have let the menubar resize itself, but
718 		// in fixed size mode, the menubar is supposed to
719 		// be at the right end of the view always. Since
720 		// the menu bar is in follow left/right mode then,
721 		// resizing ourselfs might have caused the menubar
722 		// to be outside now
723 		fMenuBar->ResizeTo(_MenuBarWidth(), fMenuBar->Frame().Height());
724 	}
725 }
726 
727 
728 void
729 BMenuField::GetPreferredSize(float* _width, float* _height)
730 {
731 	CALLED();
732 
733 	_ValidateLayoutData();
734 
735 	if (_width)
736 		*_width = fLayoutData->min.width;
737 
738 	if (_height)
739 		*_height = fLayoutData->min.height;
740 }
741 
742 
743 BSize
744 BMenuField::MinSize()
745 {
746 	CALLED();
747 
748 	_ValidateLayoutData();
749 	return BLayoutUtils::ComposeSize(ExplicitMinSize(), fLayoutData->min);
750 }
751 
752 
753 BSize
754 BMenuField::MaxSize()
755 {
756 	CALLED();
757 
758 	_ValidateLayoutData();
759 
760 	BSize max = fLayoutData->min;
761 	max.width = B_SIZE_UNLIMITED;
762 
763 	return BLayoutUtils::ComposeSize(ExplicitMaxSize(), max);
764 }
765 
766 
767 BSize
768 BMenuField::PreferredSize()
769 {
770 	CALLED();
771 
772 	_ValidateLayoutData();
773 	return BLayoutUtils::ComposeSize(ExplicitPreferredSize(), fLayoutData->min);
774 }
775 
776 
777 BLayoutItem*
778 BMenuField::CreateLabelLayoutItem()
779 {
780 	if (!fLayoutData->label_layout_item)
781 		fLayoutData->label_layout_item = new LabelLayoutItem(this);
782 	return fLayoutData->label_layout_item;
783 }
784 
785 
786 BLayoutItem*
787 BMenuField::CreateMenuBarLayoutItem()
788 {
789 	if (!fLayoutData->menu_bar_layout_item) {
790 		// align the menu bar in the full available space
791 		fMenuBar->SetExplicitAlignment(BAlignment(B_ALIGN_USE_FULL_WIDTH,
792 			B_ALIGN_VERTICAL_UNSET));
793 		fLayoutData->menu_bar_layout_item = new MenuBarLayoutItem(this);
794 	}
795 	return fLayoutData->menu_bar_layout_item;
796 }
797 
798 
799 status_t
800 BMenuField::Perform(perform_code code, void* _data)
801 {
802 	switch (code) {
803 		case PERFORM_CODE_MIN_SIZE:
804 			((perform_data_min_size*)_data)->return_value
805 				= BMenuField::MinSize();
806 			return B_OK;
807 		case PERFORM_CODE_MAX_SIZE:
808 			((perform_data_max_size*)_data)->return_value
809 				= BMenuField::MaxSize();
810 			return B_OK;
811 		case PERFORM_CODE_PREFERRED_SIZE:
812 			((perform_data_preferred_size*)_data)->return_value
813 				= BMenuField::PreferredSize();
814 			return B_OK;
815 		case PERFORM_CODE_LAYOUT_ALIGNMENT:
816 			((perform_data_layout_alignment*)_data)->return_value
817 				= BMenuField::LayoutAlignment();
818 			return B_OK;
819 		case PERFORM_CODE_HAS_HEIGHT_FOR_WIDTH:
820 			((perform_data_has_height_for_width*)_data)->return_value
821 				= BMenuField::HasHeightForWidth();
822 			return B_OK;
823 		case PERFORM_CODE_GET_HEIGHT_FOR_WIDTH:
824 		{
825 			perform_data_get_height_for_width* data
826 				= (perform_data_get_height_for_width*)_data;
827 			BMenuField::GetHeightForWidth(data->width, &data->min, &data->max,
828 				&data->preferred);
829 			return B_OK;
830 		}
831 		case PERFORM_CODE_SET_LAYOUT:
832 		{
833 			perform_data_set_layout* data = (perform_data_set_layout*)_data;
834 			BMenuField::SetLayout(data->layout);
835 			return B_OK;
836 		}
837 		case PERFORM_CODE_LAYOUT_INVALIDATED:
838 		{
839 			perform_data_layout_invalidated* data
840 				= (perform_data_layout_invalidated*)_data;
841 			BMenuField::LayoutInvalidated(data->descendants);
842 			return B_OK;
843 		}
844 		case PERFORM_CODE_DO_LAYOUT:
845 		{
846 			BMenuField::DoLayout();
847 			return B_OK;
848 		}
849 		case PERFORM_CODE_ALL_UNARCHIVED:
850 		{
851 			perform_data_all_unarchived* data
852 				= (perform_data_all_unarchived*)_data;
853 
854 			data->return_value = BMenuField::AllUnarchived(data->archive);
855 			return B_OK;
856 		}
857 		case PERFORM_CODE_ALL_ARCHIVED:
858 		{
859 			perform_data_all_archived* data
860 				= (perform_data_all_archived*)_data;
861 
862 			data->return_value = BMenuField::AllArchived(data->archive);
863 			return B_OK;
864 		}
865 	}
866 
867 	return BView::Perform(code, _data);
868 }
869 
870 
871 void
872 BMenuField::LayoutInvalidated(bool descendants)
873 {
874 	CALLED();
875 
876 	fLayoutData->valid = false;
877 }
878 
879 
880 void
881 BMenuField::DoLayout()
882 {
883 	// Bail out, if we shan't do layout.
884 	if (!(Flags() & B_SUPPORTS_LAYOUT))
885 		return;
886 
887 	CALLED();
888 
889 	// If the user set a layout, we let the base class version call its
890 	// hook.
891 	if (GetLayout()) {
892 		BView::DoLayout();
893 		return;
894 	}
895 
896 	_ValidateLayoutData();
897 
898 	// validate current size
899 	BSize size(Bounds().Size());
900 	if (size.width < fLayoutData->min.width)
901 		size.width = fLayoutData->min.width;
902 	if (size.height < fLayoutData->min.height)
903 		size.height = fLayoutData->min.height;
904 
905 	// divider
906 	float divider = 0;
907 	if (fLayoutData->label_layout_item && fLayoutData->menu_bar_layout_item) {
908 		// We have layout items. They define the divider location.
909 		divider = fLayoutData->menu_bar_layout_item->Frame().left
910 			- fLayoutData->label_layout_item->Frame().left;
911 	} else {
912 		if (fLayoutData->label_width > 0)
913 			divider = fLayoutData->label_width + 5;
914 	}
915 
916 	// menu bar
917 	BRect dirty(fMenuBar->Frame());
918 	BRect menuBarFrame(divider + kVMargin, kVMargin, size.width - kVMargin,
919 		size.height - kVMargin);
920 
921 	// place the menu bar and set the divider
922 	BLayoutUtils::AlignInFrame(fMenuBar, menuBarFrame);
923 
924 	fDivider = divider;
925 
926 	// invalidate dirty region
927 	dirty = dirty | fMenuBar->Frame();
928 	dirty.InsetBy(-kVMargin, -kVMargin);
929 
930 	Invalidate(dirty);
931 }
932 
933 
934 void BMenuField::_ReservedMenuField1() {}
935 void BMenuField::_ReservedMenuField2() {}
936 void BMenuField::_ReservedMenuField3() {}
937 
938 
939 void
940 BMenuField::InitObject(const char* label)
941 {
942 	CALLED();
943 
944 	fLabel = NULL;
945 	fMenu = NULL;
946 	fMenuBar = NULL;
947 	fAlign = B_ALIGN_LEFT;
948 	fEnabled = true;
949 	fSelected = false;
950 	fTransition = false;
951 	fFixedSizeMB = false;
952 	fMenuTaskID = -1;
953 	fLayoutData = new LayoutData;
954 
955 	SetLabel(label);
956 
957 	if (label)
958 		fDivider = (float)floor(Frame().Width() / 2.0f);
959 	else
960 		fDivider = 0;
961 }
962 
963 
964 void
965 BMenuField::InitObject2()
966 {
967 	CALLED();
968 
969 	float height;
970 	fMenuBar->GetPreferredSize(NULL, &height);
971 	fMenuBar->ResizeTo(_MenuBarWidth(), height);
972 
973 	TRACE("frame(%.1f, %.1f, %.1f, %.1f) (%.2f, %.2f)\n",
974 		fMenuBar->Frame().left, fMenuBar->Frame().top,
975 		fMenuBar->Frame().right, fMenuBar->Frame().bottom,
976 		fMenuBar->Frame().Width(), fMenuBar->Frame().Height());
977 
978 	fMenuBar->AddFilter(new _BMCFilter_(this, B_MOUSE_DOWN));
979 }
980 
981 
982 void
983 BMenuField::DrawLabel(BRect bounds, BRect update)
984 {
985 	CALLED();
986 
987 	_ValidateLayoutData();
988 	font_height& fh = fLayoutData->font_info;
989 
990 	if (Label()) {
991 		SetLowColor(ViewColor());
992 
993 		// horizontal alignment
994 		float x;
995 		switch (fAlign) {
996 			case B_ALIGN_RIGHT:
997 				x = fDivider - fLayoutData->label_width - 3.0;
998 				break;
999 
1000 			case B_ALIGN_CENTER:
1001 				x = fDivider - fLayoutData->label_width / 2.0;
1002 				break;
1003 
1004 			default:
1005 				x = 0.0;
1006 				break;
1007 		}
1008 
1009 		// vertical alignment
1010 		float y = Bounds().top
1011 			+ (Bounds().Height() + 1 - fh.ascent - fh.descent) / 2
1012 			+ fh.ascent;
1013 		y = floor(y + 0.5);
1014 
1015 		SetHighColor(tint_color(ui_color(B_PANEL_BACKGROUND_COLOR),
1016 			IsEnabled() ? B_DARKEN_MAX_TINT : B_DISABLED_LABEL_TINT));
1017 		DrawString(Label(), BPoint(x, y));
1018 	}
1019 }
1020 
1021 
1022 void
1023 BMenuField::InitMenu(BMenu* menu)
1024 {
1025 	menu->SetFont(be_plain_font);
1026 
1027 	int32 index = 0;
1028 	BMenu* subMenu;
1029 
1030 	while ((subMenu = menu->SubmenuAt(index++)) != NULL)
1031 		InitMenu(subMenu);
1032 }
1033 
1034 
1035 /*static*/ int32
1036 BMenuField::_thread_entry(void* arg)
1037 {
1038 	return static_cast<BMenuField*>(arg)->_MenuTask();
1039 }
1040 
1041 
1042 int32
1043 BMenuField::_MenuTask()
1044 {
1045 	if (!LockLooper())
1046 		return 0;
1047 
1048 	fSelected = true;
1049 	fTransition = true;
1050 	Invalidate();
1051 	UnlockLooper();
1052 
1053 	bool tracking;
1054 	do {
1055 		snooze(20000);
1056 		if (!LockLooper())
1057 			return 0;
1058 
1059 		tracking = fMenuBar->fTracking;
1060 
1061 		UnlockLooper();
1062 	} while (tracking);
1063 
1064 	if (LockLooper()) {
1065 		fSelected = false;
1066 		fTransition = true;
1067 		Invalidate();
1068 		UnlockLooper();
1069 	}
1070 
1071 	return 0;
1072 }
1073 
1074 
1075 void
1076 BMenuField::_UpdateFrame()
1077 {
1078 	CALLED();
1079 
1080 	if (fLayoutData->label_layout_item && fLayoutData->menu_bar_layout_item) {
1081 		BRect labelFrame = fLayoutData->label_layout_item->Frame();
1082 		BRect menuFrame = fLayoutData->menu_bar_layout_item->Frame();
1083 
1084 		// update divider
1085 		fDivider = menuFrame.left - labelFrame.left;
1086 
1087 		// update our frame
1088 		MoveTo(labelFrame.left, labelFrame.top);
1089 		BSize oldSize = Bounds().Size();
1090 		ResizeTo(menuFrame.left + menuFrame.Width() - labelFrame.left,
1091 			menuFrame.top + menuFrame.Height() - labelFrame.top);
1092 		BSize newSize = Bounds().Size();
1093 
1094 		// If the size changes, ResizeTo() will trigger a relayout, otherwise
1095 		// we need to do that explicitly.
1096 		if (newSize != oldSize)
1097 			Relayout();
1098 	}
1099 }
1100 
1101 
1102 void
1103 BMenuField::_InitMenuBar(BMenu* menu, BRect frame, bool fixedSize)
1104 {
1105 	CALLED();
1106 
1107 	fMenu = menu;
1108 	InitMenu(menu);
1109 
1110 	if ((Flags() & B_SUPPORTS_LAYOUT)) {
1111 		fMenuBar = new _BMCMenuBar_(fixedSize, this);
1112 	} else {
1113 		frame.left = _MenuBarOffset();
1114 		frame.top = kVMargin;
1115 		frame.right -= kVMargin;
1116 		frame.bottom -= kVMargin;
1117 
1118 		TRACE("frame(%.1f, %.1f, %.1f, %.1f) (%.2f, %.2f)\n",
1119 			frame.left, frame.top, frame.right, frame.bottom,
1120 			frame.Width(), frame.Height());
1121 
1122 		fMenuBar = new _BMCMenuBar_(frame, fixedSize, this);
1123 	}
1124 
1125 	if (fixedSize) {
1126 		// align the menu bar in the full available space
1127 		fMenuBar->SetExplicitAlignment(BAlignment(B_ALIGN_USE_FULL_WIDTH,
1128 			B_ALIGN_VERTICAL_UNSET));
1129 	} else {
1130 		// align the menu bar left in the available space
1131 		fMenuBar->SetExplicitAlignment(BAlignment(B_ALIGN_LEFT,
1132 			B_ALIGN_VERTICAL_UNSET));
1133 	}
1134 
1135 	AddChild(fMenuBar);
1136 	fMenuBar->AddItem(menu);
1137 
1138 	fMenuBar->SetFont(be_plain_font);
1139 }
1140 
1141 
1142 void
1143 BMenuField::_InitMenuBar(const BMessage* archive)
1144 {
1145 	bool fixed;
1146 	if (archive->FindBool("be:fixeds", &fixed) == B_OK)
1147 		fFixedSizeMB = fixed;
1148 
1149 	fMenuBar = (BMenuBar*)FindView("_mc_mb_");
1150 	if (!fMenuBar) {
1151 		_InitMenuBar(new BMenu(""), BRect(0, 0, 100, 15), fFixedSizeMB);
1152 		InitObject2();
1153 	} else {
1154 		fMenuBar->AddFilter(new _BMCFilter_(this, B_MOUSE_DOWN));
1155 			// this is normally done in InitObject2()
1156 	}
1157 
1158 	fMenu = fMenuBar->SubmenuAt(0);
1159 
1160 	bool disable;
1161 	if (archive->FindBool("_disable", &disable) == B_OK)
1162 		SetEnabled(!disable);
1163 
1164 	bool dmark = false;
1165 	archive->FindBool("be:dmark", &dmark);
1166 	if (_BMCMenuBar_* menuBar = dynamic_cast<_BMCMenuBar_*>(fMenuBar))
1167 		menuBar->TogglePopUpMarker(dmark);
1168 }
1169 
1170 
1171 void
1172 BMenuField::_ValidateLayoutData()
1173 {
1174 	CALLED();
1175 
1176 	if (fLayoutData->valid)
1177 		return;
1178 
1179 	// cache font height
1180 	font_height& fh = fLayoutData->font_info;
1181 	GetFontHeight(&fh);
1182 
1183 	if (Label() != NULL) {
1184 		fLayoutData->label_width = ceilf(StringWidth(Label()));
1185 		fLayoutData->label_height = ceilf(fh.ascent) + ceilf(fh.descent);
1186 	} else {
1187 		fLayoutData->label_width = 0;
1188 		fLayoutData->label_height = 0;
1189 	}
1190 
1191 	// compute the minimal divider
1192 	float divider = 0;
1193 	if (fLayoutData->label_width > 0)
1194 		divider = fLayoutData->label_width + 5;
1195 
1196 	// If we shan't do real layout, we let the current divider take influence.
1197 	if (!(Flags() & B_SUPPORTS_LAYOUT))
1198 		divider = max_c(divider, fDivider);
1199 
1200 	// get the minimal (== preferred) menu bar size
1201 	// TODO: BMenu::MinSize() is using the ResizeMode() to decide the
1202 	// minimum width. If the mode is B_FOLLOW_LEFT_RIGHT, it will use the
1203 	// parent's frame width or window's frame width. So at least the returned
1204 	// size is wrong, but apparantly it doesn't have much bad effect.
1205 	fLayoutData->menu_bar_min = fMenuBar->MinSize();
1206 
1207 	TRACE("menu bar min width: %.2f\n", fLayoutData->menu_bar_min.width);
1208 
1209 	// compute our minimal (== preferred) size
1210 	BSize min(fLayoutData->menu_bar_min);
1211 	min.width += 2 * kVMargin;
1212 	min.height += 2 * kVMargin;
1213 
1214 	if (divider > 0)
1215 		min.width += divider;
1216 	if (fLayoutData->label_height > min.height)
1217 		min.height = fLayoutData->label_height;
1218 
1219 	fLayoutData->min = min;
1220 
1221 	fLayoutData->valid = true;
1222 	ResetLayoutInvalidation();
1223 
1224 	TRACE("width: %.2f, height: %.2f\n", min.width, min.height);
1225 }
1226 
1227 
1228 float
1229 BMenuField::_MenuBarOffset() const
1230 {
1231 	return max_c(kVMargin, fDivider + kVMargin);
1232 }
1233 
1234 
1235 float
1236 BMenuField::_MenuBarWidth() const
1237 {
1238 	return Bounds().Width() - (_MenuBarOffset() + kVMargin);
1239 }
1240 
1241 
1242 // #pragma mark -
1243 
1244 
1245 BMenuField::LabelLayoutItem::LabelLayoutItem(BMenuField* parent)
1246 	:
1247 	fParent(parent),
1248 	fFrame()
1249 {
1250 }
1251 
1252 
1253 BMenuField::LabelLayoutItem::LabelLayoutItem(BMessage* from)
1254 	:
1255 	BAbstractLayoutItem(from),
1256 	fParent(NULL),
1257 	fFrame()
1258 {
1259 	from->FindRect(kFrameField, &fFrame);
1260 }
1261 
1262 
1263 bool
1264 BMenuField::LabelLayoutItem::IsVisible()
1265 {
1266 	return !fParent->IsHidden(fParent);
1267 }
1268 
1269 
1270 void
1271 BMenuField::LabelLayoutItem::SetVisible(bool visible)
1272 {
1273 	// not allowed
1274 }
1275 
1276 
1277 BRect
1278 BMenuField::LabelLayoutItem::Frame()
1279 {
1280 	return fFrame;
1281 }
1282 
1283 
1284 void
1285 BMenuField::LabelLayoutItem::SetFrame(BRect frame)
1286 {
1287 	fFrame = frame;
1288 	fParent->_UpdateFrame();
1289 }
1290 
1291 
1292 void
1293 BMenuField::LabelLayoutItem::SetParent(BMenuField* parent)
1294 {
1295 	fParent = parent;
1296 }
1297 
1298 
1299 BView*
1300 BMenuField::LabelLayoutItem::View()
1301 {
1302 	return fParent;
1303 }
1304 
1305 
1306 BSize
1307 BMenuField::LabelLayoutItem::BaseMinSize()
1308 {
1309 	fParent->_ValidateLayoutData();
1310 
1311 	if (!fParent->Label())
1312 		return BSize(-1, -1);
1313 
1314 	return BSize(fParent->fLayoutData->label_width + 5,
1315 		fParent->fLayoutData->label_height);
1316 }
1317 
1318 
1319 BSize
1320 BMenuField::LabelLayoutItem::BaseMaxSize()
1321 {
1322 	return BaseMinSize();
1323 }
1324 
1325 
1326 BSize
1327 BMenuField::LabelLayoutItem::BasePreferredSize()
1328 {
1329 	return BaseMinSize();
1330 }
1331 
1332 
1333 BAlignment
1334 BMenuField::LabelLayoutItem::BaseAlignment()
1335 {
1336 	return BAlignment(B_ALIGN_USE_FULL_WIDTH, B_ALIGN_USE_FULL_HEIGHT);
1337 }
1338 
1339 
1340 status_t
1341 BMenuField::LabelLayoutItem::Archive(BMessage* into, bool deep) const
1342 {
1343 	BArchiver archiver(into);
1344 	status_t err = BAbstractLayoutItem::Archive(into, deep);
1345 
1346 	if (err == B_OK)
1347 		err = into->AddRect(kFrameField, fFrame);
1348 
1349 	return archiver.Finish(err);
1350 }
1351 
1352 
1353 BArchivable*
1354 BMenuField::LabelLayoutItem::Instantiate(BMessage* from)
1355 {
1356 	if (validate_instantiation(from, "BMenuField::LabelLayoutItem"))
1357 		return new LabelLayoutItem(from);
1358 	return NULL;
1359 }
1360 
1361 
1362 // #pragma mark -
1363 
1364 
1365 BMenuField::MenuBarLayoutItem::MenuBarLayoutItem(BMenuField* parent)
1366 	:
1367 	fParent(parent),
1368 	fFrame()
1369 {
1370 	// by default the part right of the divider shall have an unlimited maximum
1371 	// width
1372 	SetExplicitMaxSize(BSize(B_SIZE_UNLIMITED, B_SIZE_UNSET));
1373 }
1374 
1375 
1376 BMenuField::MenuBarLayoutItem::MenuBarLayoutItem(BMessage* from)
1377 	:
1378 	BAbstractLayoutItem(from),
1379 	fParent(NULL),
1380 	fFrame()
1381 {
1382 	from->FindRect(kFrameField, &fFrame);
1383 }
1384 
1385 
1386 bool
1387 BMenuField::MenuBarLayoutItem::IsVisible()
1388 {
1389 	return !fParent->IsHidden(fParent);
1390 }
1391 
1392 
1393 void
1394 BMenuField::MenuBarLayoutItem::SetVisible(bool visible)
1395 {
1396 	// not allowed
1397 }
1398 
1399 
1400 BRect
1401 BMenuField::MenuBarLayoutItem::Frame()
1402 {
1403 	return fFrame;
1404 }
1405 
1406 
1407 void
1408 BMenuField::MenuBarLayoutItem::SetFrame(BRect frame)
1409 {
1410 	fFrame = frame;
1411 	fParent->_UpdateFrame();
1412 }
1413 
1414 
1415 void
1416 BMenuField::MenuBarLayoutItem::SetParent(BMenuField* parent)
1417 {
1418 	fParent = parent;
1419 }
1420 
1421 
1422 BView*
1423 BMenuField::MenuBarLayoutItem::View()
1424 {
1425 	return fParent;
1426 }
1427 
1428 
1429 BSize
1430 BMenuField::MenuBarLayoutItem::BaseMinSize()
1431 {
1432 	fParent->_ValidateLayoutData();
1433 
1434 	BSize size = fParent->fLayoutData->menu_bar_min;
1435 	size.width += 2 * kVMargin;
1436 	size.height += 2 * kVMargin;
1437 
1438 	return size;
1439 }
1440 
1441 
1442 BSize
1443 BMenuField::MenuBarLayoutItem::BaseMaxSize()
1444 {
1445 	BSize size(BaseMinSize());
1446 	size.width = B_SIZE_UNLIMITED;
1447 	return size;
1448 }
1449 
1450 
1451 BSize
1452 BMenuField::MenuBarLayoutItem::BasePreferredSize()
1453 {
1454 	return BaseMinSize();
1455 }
1456 
1457 
1458 BAlignment
1459 BMenuField::MenuBarLayoutItem::BaseAlignment()
1460 {
1461 	return BAlignment(B_ALIGN_USE_FULL_WIDTH, B_ALIGN_USE_FULL_HEIGHT);
1462 }
1463 
1464 
1465 status_t
1466 BMenuField::MenuBarLayoutItem::Archive(BMessage* into, bool deep) const
1467 {
1468 	BArchiver archiver(into);
1469 	status_t err = BAbstractLayoutItem::Archive(into, deep);
1470 
1471 	if (err == B_OK)
1472 		err = into->AddRect(kFrameField, fFrame);
1473 
1474 	return archiver.Finish(err);
1475 }
1476 
1477 
1478 BArchivable*
1479 BMenuField::MenuBarLayoutItem::Instantiate(BMessage* from)
1480 {
1481 	if (validate_instantiation(from, "BMenuField::MenuBarLayoutItem"))
1482 		return new MenuBarLayoutItem(from);
1483 	return NULL;
1484 }
1485 
1486 
1487 extern "C" void
1488 B_IF_GCC_2(InvalidateLayout__10BMenuFieldb, _ZN10BMenuField16InvalidateLayoutEb)(
1489 	BMenuField* field, bool descendants)
1490 {
1491 	perform_data_layout_invalidated data;
1492 	data.descendants = descendants;
1493 
1494 	field->Perform(PERFORM_CODE_LAYOUT_INVALIDATED, &data);
1495 }
1496 
1497