xref: /haiku/src/kits/interface/MenuField.cpp (revision b46615c55ad2c8fe6de54412055a0713da3d610a) 
1 /*
2  * Copyright 2001-2011, 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 	if (be_control_look != NULL) {
366 		frame.InsetBy(-kVMargin, -kVMargin);
367 		rgb_color base = fMenuBar->LowColor();
368 		rgb_color background = LowColor();
369 		uint32 flags = 0;
370 		if (!fMenuBar->IsEnabled())
371 			flags |= BControlLook::B_DISABLED;
372 		if (active)
373 			flags |= BControlLook::B_FOCUSED;
374 		be_control_look->DrawMenuFieldFrame(this, frame, update, base,
375 			background, flags);
376 		return;
377 	}
378 
379 	if (frame.InsetByCopy(-kVMargin, -kVMargin).Intersects(update)) {
380 		SetHighColor(tint_color(ui_color(B_MENU_BACKGROUND_COLOR), B_DARKEN_2_TINT));
381 		StrokeLine(BPoint(frame.left - 1.0f, frame.top - 1.0f),
382 			BPoint(frame.left - 1.0f, frame.bottom - 1.0f));
383 		StrokeLine(BPoint(frame.left - 1.0f, frame.top - 1.0f),
384 			BPoint(frame.right - 1.0f, frame.top - 1.0f));
385 
386 		StrokeLine(BPoint(frame.left + 1.0f, frame.bottom + 1.0f),
387 			BPoint(frame.right + 1.0f, frame.bottom + 1.0f));
388 		StrokeLine(BPoint(frame.right + 1.0f, frame.top + 1.0f));
389 
390 		SetHighColor(tint_color(ui_color(B_MENU_BACKGROUND_COLOR), B_DARKEN_4_TINT));
391 		StrokeLine(BPoint(frame.left - 1.0f, frame.bottom),
392 			BPoint(frame.left - 1.0f, frame.bottom));
393 		StrokeLine(BPoint(frame.right, frame.top - 1.0f),
394 			BPoint(frame.right, frame.top - 1.0f));
395 	}
396 
397 	if (active || fTransition) {
398 		SetHighColor(active ? ui_color(B_KEYBOARD_NAVIGATION_COLOR) :
399 			ViewColor());
400 		StrokeRect(frame.InsetByCopy(-kVMargin, -kVMargin));
401 
402 		fTransition = false;
403 	}
404 }
405 
406 
407 void
408 BMenuField::AttachedToWindow()
409 {
410 	CALLED();
411 
412 	BView* parent = Parent();
413 	if (parent != NULL) {
414 		// inherit the color from parent
415 		rgb_color color = parent->ViewColor();
416 		if (color == B_TRANSPARENT_COLOR)
417 			color = ui_color(B_PANEL_BACKGROUND_COLOR);
418 
419 		SetViewColor(color);
420 		SetLowColor(color);
421 	}
422 }
423 
424 
425 void
426 BMenuField::AllAttached()
427 {
428 	CALLED();
429 
430 	TRACE("width: %.2f, height: %.2f\n", Frame().Width(), Frame().Height());
431 
432 	ResizeTo(Bounds().Width(),
433 		fMenuBar->Bounds().Height() + kVMargin + kVMargin);
434 
435 	TRACE("width: %.2f, height: %.2f\n", Frame().Width(), Frame().Height());
436 }
437 
438 
439 void
440 BMenuField::MouseDown(BPoint where)
441 {
442 	if (!fMenuBar->Frame().Contains(where))
443 		return;
444 
445 	if (!fMenuBar->IsEnabled())
446 		return;
447 
448 	BRect bounds = fMenuBar->ConvertFromParent(Bounds());
449 
450 	fMenuBar->StartMenuBar(-1, false, true, &bounds);
451 
452 	fMenuTaskID = spawn_thread((thread_func)_thread_entry,
453 			 	"_m_task_", B_NORMAL_PRIORITY, this);
454 	if (fMenuTaskID >= 0)
455 		resume_thread(fMenuTaskID);
456 }
457 
458 
459 void
460 BMenuField::KeyDown(const char* bytes, int32 numBytes)
461 {
462 	switch (bytes[0]) {
463 		case B_SPACE:
464 		case B_RIGHT_ARROW:
465 		case B_DOWN_ARROW:
466 		{
467 			if (!IsEnabled())
468 				break;
469 
470 			BRect bounds = fMenuBar->ConvertFromParent(Bounds());
471 
472 			fMenuBar->StartMenuBar(0, true, true, &bounds);
473 
474 			fSelected = true;
475 			fTransition = true;
476 
477 			bounds = Bounds();
478 			bounds.right = fDivider;
479 
480 			Invalidate(bounds);
481 		}
482 
483 		default:
484 			BView::KeyDown(bytes, numBytes);
485 	}
486 }
487 
488 
489 void
490 BMenuField::MakeFocus(bool state)
491 {
492 	if (IsFocus() == state)
493 		return;
494 
495 	BView::MakeFocus(state);
496 
497 	if (Window())
498 		Invalidate(); // TODO: use fLayoutData->label_width
499 }
500 
501 
502 void
503 BMenuField::MessageReceived(BMessage* msg)
504 {
505 	BView::MessageReceived(msg);
506 }
507 
508 
509 void
510 BMenuField::WindowActivated(bool state)
511 {
512 	BView::WindowActivated(state);
513 
514 	if (IsFocus())
515 		Invalidate();
516 }
517 
518 
519 void
520 BMenuField::MouseUp(BPoint point)
521 {
522 	BView::MouseUp(point);
523 }
524 
525 
526 void
527 BMenuField::MouseMoved(BPoint point, uint32 code, const BMessage* message)
528 {
529 	BView::MouseMoved(point, code, message);
530 }
531 
532 
533 void
534 BMenuField::DetachedFromWindow()
535 {
536 	BView::DetachedFromWindow();
537 }
538 
539 
540 void
541 BMenuField::AllDetached()
542 {
543 	BView::AllDetached();
544 }
545 
546 
547 void
548 BMenuField::FrameMoved(BPoint newPosition)
549 {
550 	BView::FrameMoved(newPosition);
551 }
552 
553 
554 void
555 BMenuField::FrameResized(float newWidth, float newHeight)
556 {
557 	BView::FrameResized(newWidth, newHeight);
558 
559 	if (newHeight != fLayoutData->previous_height && Label()) {
560 		// The height changed, which means the label has to move and we
561 		// probably also invalidate a part of the borders around the menu bar.
562 		// So don't be shy and invalidate the whole thing.
563 		Invalidate();
564 	}
565 
566 	fLayoutData->previous_height = newHeight;
567 }
568 
569 
570 BMenu*
571 BMenuField::Menu() const
572 {
573 	return fMenu;
574 }
575 
576 
577 BMenuBar*
578 BMenuField::MenuBar() const
579 {
580 	return fMenuBar;
581 }
582 
583 
584 BMenuItem*
585 BMenuField::MenuItem() const
586 {
587 	return fMenuBar->ItemAt(0);
588 }
589 
590 
591 void
592 BMenuField::SetLabel(const char* label)
593 {
594 	if (fLabel) {
595 		if (label && strcmp(fLabel, label) == 0)
596 			return;
597 
598 		free(fLabel);
599 	}
600 
601 	fLabel = strdup(label);
602 
603 	if (Window())
604 		Invalidate();
605 
606 	InvalidateLayout();
607 }
608 
609 
610 const char*
611 BMenuField::Label() const
612 {
613 	return fLabel;
614 }
615 
616 
617 void
618 BMenuField::SetEnabled(bool on)
619 {
620 	if (fEnabled == on)
621 		return;
622 
623 	fEnabled = on;
624 	fMenuBar->SetEnabled(on);
625 
626 	if (Window()) {
627 		fMenuBar->Invalidate(fMenuBar->Bounds());
628 		Invalidate(Bounds());
629 	}
630 }
631 
632 
633 bool
634 BMenuField::IsEnabled() const
635 {
636 	return fEnabled;
637 }
638 
639 
640 void
641 BMenuField::SetAlignment(alignment label)
642 {
643 	fAlign = label;
644 }
645 
646 
647 alignment
648 BMenuField::Alignment() const
649 {
650 	return fAlign;
651 }
652 
653 
654 void
655 BMenuField::SetDivider(float divider)
656 {
657 	divider = floorf(divider + 0.5);
658 
659 	float dx = fDivider - divider;
660 
661 	if (dx == 0.0f)
662 		return;
663 
664 	fDivider = divider;
665 
666 	if (Flags() & B_SUPPORTS_LAYOUT) {
667 		// We should never get here, since layout support means, we also
668 		// layout the divider, and don't use this method at all.
669 		Relayout();
670 	} else {
671 		BRect dirty(fMenuBar->Frame());
672 
673 		fMenuBar->MoveTo(_MenuBarOffset(), kVMargin);
674 
675 		if (fFixedSizeMB)
676 			fMenuBar->ResizeTo(_MenuBarWidth(), dirty.Height());
677 
678 		dirty = dirty | fMenuBar->Frame();
679 		dirty.InsetBy(-kVMargin, -kVMargin);
680 
681 		Invalidate(dirty);
682 	}
683 }
684 
685 
686 float
687 BMenuField::Divider() const
688 {
689 	return fDivider;
690 }
691 
692 
693 void
694 BMenuField::ShowPopUpMarker()
695 {
696 	if (_BMCMenuBar_* menuBar = dynamic_cast<_BMCMenuBar_*>(fMenuBar)) {
697 		menuBar->TogglePopUpMarker(true);
698 		menuBar->Invalidate();
699 	}
700 }
701 
702 
703 void
704 BMenuField::HidePopUpMarker()
705 {
706 	if (_BMCMenuBar_* menuBar = dynamic_cast<_BMCMenuBar_*>(fMenuBar)) {
707 		menuBar->TogglePopUpMarker(false);
708 		menuBar->Invalidate();
709 	}
710 }
711 
712 
713 BHandler*
714 BMenuField::ResolveSpecifier(BMessage* message, int32 index,
715 	BMessage* specifier, int32 form, const char* property)
716 {
717 	return BView::ResolveSpecifier(message, index, specifier, form, property);
718 }
719 
720 
721 status_t
722 BMenuField::GetSupportedSuites(BMessage* data)
723 {
724 	return BView::GetSupportedSuites(data);
725 }
726 
727 
728 void
729 BMenuField::ResizeToPreferred()
730 {
731 	CALLED();
732 
733 	TRACE("fMenuBar->Frame().width: %.2f, height: %.2f\n",
734 		fMenuBar->Frame().Width(), fMenuBar->Frame().Height());
735 
736 	fMenuBar->ResizeToPreferred();
737 
738 	TRACE("fMenuBar->Frame().width: %.2f, height: %.2f\n",
739 		fMenuBar->Frame().Width(), fMenuBar->Frame().Height());
740 
741 	BView::ResizeToPreferred();
742 
743 	if (fFixedSizeMB) {
744 		// we have let the menubar resize itself, but
745 		// in fixed size mode, the menubar is supposed to
746 		// be at the right end of the view always. Since
747 		// the menu bar is in follow left/right mode then,
748 		// resizing ourselfs might have caused the menubar
749 		// to be outside now
750 		fMenuBar->ResizeTo(_MenuBarWidth(), fMenuBar->Frame().Height());
751 	}
752 }
753 
754 
755 void
756 BMenuField::GetPreferredSize(float* _width, float* _height)
757 {
758 	CALLED();
759 
760 	_ValidateLayoutData();
761 
762 	if (_width)
763 		*_width = fLayoutData->min.width;
764 
765 	if (_height)
766 		*_height = fLayoutData->min.height;
767 }
768 
769 
770 BSize
771 BMenuField::MinSize()
772 {
773 	CALLED();
774 
775 	_ValidateLayoutData();
776 	return BLayoutUtils::ComposeSize(ExplicitMinSize(), fLayoutData->min);
777 }
778 
779 
780 BSize
781 BMenuField::MaxSize()
782 {
783 	CALLED();
784 
785 	_ValidateLayoutData();
786 
787 	BSize max = fLayoutData->min;
788 	max.width = B_SIZE_UNLIMITED;
789 
790 	return BLayoutUtils::ComposeSize(ExplicitMaxSize(), max);
791 }
792 
793 
794 BSize
795 BMenuField::PreferredSize()
796 {
797 	CALLED();
798 
799 	_ValidateLayoutData();
800 	return BLayoutUtils::ComposeSize(ExplicitPreferredSize(), fLayoutData->min);
801 }
802 
803 
804 void
805 BMenuField::InvalidateLayout(bool descendants)
806 {
807 	CALLED();
808 
809 	fLayoutData->valid = false;
810 
811 	BView::InvalidateLayout(descendants);
812 }
813 
814 
815 BLayoutItem*
816 BMenuField::CreateLabelLayoutItem()
817 {
818 	if (!fLayoutData->label_layout_item)
819 		fLayoutData->label_layout_item = new LabelLayoutItem(this);
820 	return fLayoutData->label_layout_item;
821 }
822 
823 
824 BLayoutItem*
825 BMenuField::CreateMenuBarLayoutItem()
826 {
827 	if (!fLayoutData->menu_bar_layout_item) {
828 		// align the menu bar in the full available space
829 		fMenuBar->SetExplicitAlignment(BAlignment(B_ALIGN_USE_FULL_WIDTH,
830 			B_ALIGN_VERTICAL_UNSET));
831 		fLayoutData->menu_bar_layout_item = new MenuBarLayoutItem(this);
832 	}
833 	return fLayoutData->menu_bar_layout_item;
834 }
835 
836 
837 status_t
838 BMenuField::Perform(perform_code code, void* _data)
839 {
840 	switch (code) {
841 		case PERFORM_CODE_MIN_SIZE:
842 			((perform_data_min_size*)_data)->return_value
843 				= BMenuField::MinSize();
844 			return B_OK;
845 		case PERFORM_CODE_MAX_SIZE:
846 			((perform_data_max_size*)_data)->return_value
847 				= BMenuField::MaxSize();
848 			return B_OK;
849 		case PERFORM_CODE_PREFERRED_SIZE:
850 			((perform_data_preferred_size*)_data)->return_value
851 				= BMenuField::PreferredSize();
852 			return B_OK;
853 		case PERFORM_CODE_LAYOUT_ALIGNMENT:
854 			((perform_data_layout_alignment*)_data)->return_value
855 				= BMenuField::LayoutAlignment();
856 			return B_OK;
857 		case PERFORM_CODE_HAS_HEIGHT_FOR_WIDTH:
858 			((perform_data_has_height_for_width*)_data)->return_value
859 				= BMenuField::HasHeightForWidth();
860 			return B_OK;
861 		case PERFORM_CODE_GET_HEIGHT_FOR_WIDTH:
862 		{
863 			perform_data_get_height_for_width* data
864 				= (perform_data_get_height_for_width*)_data;
865 			BMenuField::GetHeightForWidth(data->width, &data->min, &data->max,
866 				&data->preferred);
867 			return B_OK;
868 		}
869 		case PERFORM_CODE_SET_LAYOUT:
870 		{
871 			perform_data_set_layout* data = (perform_data_set_layout*)_data;
872 			BMenuField::SetLayout(data->layout);
873 			return B_OK;
874 		}
875 		case PERFORM_CODE_INVALIDATE_LAYOUT:
876 		{
877 			perform_data_invalidate_layout* data
878 				= (perform_data_invalidate_layout*)_data;
879 			BMenuField::InvalidateLayout(data->descendants);
880 			return B_OK;
881 		}
882 		case PERFORM_CODE_DO_LAYOUT:
883 		{
884 			BMenuField::DoLayout();
885 			return B_OK;
886 		}
887 		case PERFORM_CODE_ALL_UNARCHIVED:
888 		{
889 			perform_data_all_unarchived* data
890 				= (perform_data_all_unarchived*)_data;
891 
892 			data->return_value = BMenuField::AllUnarchived(data->archive);
893 			return B_OK;
894 		}
895 		case PERFORM_CODE_ALL_ARCHIVED:
896 		{
897 			perform_data_all_archived* data
898 				= (perform_data_all_archived*)_data;
899 
900 			data->return_value = BMenuField::AllArchived(data->archive);
901 			return B_OK;
902 		}
903 	}
904 
905 	return BView::Perform(code, _data);
906 }
907 
908 
909 void
910 BMenuField::DoLayout()
911 {
912 	// Bail out, if we shan't do layout.
913 	if (!(Flags() & B_SUPPORTS_LAYOUT))
914 		return;
915 
916 	CALLED();
917 
918 	// If the user set a layout, we let the base class version call its
919 	// hook.
920 	if (GetLayout()) {
921 		BView::DoLayout();
922 		return;
923 	}
924 
925 	_ValidateLayoutData();
926 
927 	// validate current size
928 	BSize size(Bounds().Size());
929 	if (size.width < fLayoutData->min.width)
930 		size.width = fLayoutData->min.width;
931 	if (size.height < fLayoutData->min.height)
932 		size.height = fLayoutData->min.height;
933 
934 	// divider
935 	float divider = 0;
936 	if (fLayoutData->label_layout_item && fLayoutData->menu_bar_layout_item) {
937 		// We have layout items. They define the divider location.
938 		divider = fLayoutData->menu_bar_layout_item->Frame().left
939 			- fLayoutData->label_layout_item->Frame().left;
940 	} else {
941 		if (fLayoutData->label_width > 0)
942 			divider = fLayoutData->label_width + 5;
943 	}
944 
945 	// menu bar
946 	BRect dirty(fMenuBar->Frame());
947 	BRect menuBarFrame(divider + kVMargin, kVMargin, size.width - kVMargin,
948 		size.height - kVMargin);
949 
950 	// place the menu bar and set the divider
951 	BLayoutUtils::AlignInFrame(fMenuBar, menuBarFrame);
952 
953 	fDivider = divider;
954 
955 	// invalidate dirty region
956 	dirty = dirty | fMenuBar->Frame();
957 	dirty.InsetBy(-kVMargin, -kVMargin);
958 
959 	Invalidate(dirty);
960 }
961 
962 
963 void BMenuField::_ReservedMenuField1() {}
964 void BMenuField::_ReservedMenuField2() {}
965 void BMenuField::_ReservedMenuField3() {}
966 
967 
968 void
969 BMenuField::InitObject(const char* label)
970 {
971 	CALLED();
972 
973 	fLabel = NULL;
974 	fMenu = NULL;
975 	fMenuBar = NULL;
976 	fAlign = B_ALIGN_LEFT;
977 	fEnabled = true;
978 	fSelected = false;
979 	fTransition = false;
980 	fFixedSizeMB = false;
981 	fMenuTaskID = -1;
982 	fLayoutData = new LayoutData;
983 
984 	SetLabel(label);
985 
986 	if (label)
987 		fDivider = (float)floor(Frame().Width() / 2.0f);
988 	else
989 		fDivider = 0;
990 }
991 
992 
993 void
994 BMenuField::InitObject2()
995 {
996 	CALLED();
997 
998 	float height;
999 	fMenuBar->GetPreferredSize(NULL, &height);
1000 	fMenuBar->ResizeTo(_MenuBarWidth(), height);
1001 
1002 	TRACE("frame(%.1f, %.1f, %.1f, %.1f) (%.2f, %.2f)\n",
1003 		fMenuBar->Frame().left, fMenuBar->Frame().top,
1004 		fMenuBar->Frame().right, fMenuBar->Frame().bottom,
1005 		fMenuBar->Frame().Width(), fMenuBar->Frame().Height());
1006 
1007 	fMenuBar->AddFilter(new _BMCFilter_(this, B_MOUSE_DOWN));
1008 }
1009 
1010 
1011 void
1012 BMenuField::DrawLabel(BRect bounds, BRect update)
1013 {
1014 	CALLED();
1015 
1016 	_ValidateLayoutData();
1017 	font_height& fh = fLayoutData->font_info;
1018 
1019 	if (Label()) {
1020 		SetLowColor(ViewColor());
1021 
1022 		// horizontal alignment
1023 		float x;
1024 		switch (fAlign) {
1025 			case B_ALIGN_RIGHT:
1026 				x = fDivider - fLayoutData->label_width - 3.0;
1027 				break;
1028 
1029 			case B_ALIGN_CENTER:
1030 				x = fDivider - fLayoutData->label_width / 2.0;
1031 				break;
1032 
1033 			default:
1034 				x = 0.0;
1035 				break;
1036 		}
1037 
1038 		// vertical alignment
1039 		float y = Bounds().top
1040 			+ (Bounds().Height() + 1 - fh.ascent - fh.descent) / 2
1041 			+ fh.ascent;
1042 		y = floor(y + 0.5);
1043 
1044 		SetHighColor(tint_color(ui_color(B_PANEL_BACKGROUND_COLOR),
1045 			IsEnabled() ? B_DARKEN_MAX_TINT : B_DISABLED_LABEL_TINT));
1046 		DrawString(Label(), BPoint(x, y));
1047 	}
1048 }
1049 
1050 
1051 void
1052 BMenuField::InitMenu(BMenu* menu)
1053 {
1054 	menu->SetFont(be_plain_font);
1055 
1056 	int32 index = 0;
1057 	BMenu* subMenu;
1058 
1059 	while ((subMenu = menu->SubmenuAt(index++)) != NULL)
1060 		InitMenu(subMenu);
1061 }
1062 
1063 
1064 /*static*/ int32
1065 BMenuField::_thread_entry(void* arg)
1066 {
1067 	return static_cast<BMenuField*>(arg)->_MenuTask();
1068 }
1069 
1070 
1071 int32
1072 BMenuField::_MenuTask()
1073 {
1074 	if (!LockLooper())
1075 		return 0;
1076 
1077 	fSelected = true;
1078 	fTransition = true;
1079 	Invalidate();
1080 	UnlockLooper();
1081 
1082 	bool tracking;
1083 	do {
1084 		snooze(20000);
1085 		if (!LockLooper())
1086 			return 0;
1087 
1088 		tracking = fMenuBar->fTracking;
1089 
1090 		UnlockLooper();
1091 	} while (tracking);
1092 
1093 	if (LockLooper()) {
1094 		fSelected = false;
1095 		fTransition = true;
1096 		Invalidate();
1097 		UnlockLooper();
1098 	}
1099 
1100 	return 0;
1101 }
1102 
1103 
1104 void
1105 BMenuField::_UpdateFrame()
1106 {
1107 	CALLED();
1108 
1109 	if (fLayoutData->label_layout_item && fLayoutData->menu_bar_layout_item) {
1110 		BRect labelFrame = fLayoutData->label_layout_item->Frame();
1111 		BRect menuFrame = fLayoutData->menu_bar_layout_item->Frame();
1112 
1113 		// update divider
1114 		fDivider = menuFrame.left - labelFrame.left;
1115 
1116 		// update our frame
1117 		MoveTo(labelFrame.left, labelFrame.top);
1118 		BSize oldSize = Bounds().Size();
1119 		ResizeTo(menuFrame.left + menuFrame.Width() - labelFrame.left,
1120 			menuFrame.top + menuFrame.Height() - labelFrame.top);
1121 		BSize newSize = Bounds().Size();
1122 
1123 		// If the size changes, ResizeTo() will trigger a relayout, otherwise
1124 		// we need to do that explicitly.
1125 		if (newSize != oldSize)
1126 			Relayout();
1127 	}
1128 }
1129 
1130 
1131 void
1132 BMenuField::_InitMenuBar(BMenu* menu, BRect frame, bool fixedSize)
1133 {
1134 	CALLED();
1135 
1136 	fMenu = menu;
1137 	InitMenu(menu);
1138 
1139 	if ((Flags() & B_SUPPORTS_LAYOUT)) {
1140 		fMenuBar = new _BMCMenuBar_(fixedSize, this);
1141 	} else {
1142 		frame.left = _MenuBarOffset();
1143 		frame.top = kVMargin;
1144 		frame.right -= kVMargin;
1145 		frame.bottom -= kVMargin;
1146 
1147 		TRACE("frame(%.1f, %.1f, %.1f, %.1f) (%.2f, %.2f)\n",
1148 			frame.left, frame.top, frame.right, frame.bottom,
1149 			frame.Width(), frame.Height());
1150 
1151 		fMenuBar = new _BMCMenuBar_(frame, fixedSize, this);
1152 	}
1153 
1154 	if (fixedSize) {
1155 		// align the menu bar in the full available space
1156 		fMenuBar->SetExplicitAlignment(BAlignment(B_ALIGN_USE_FULL_WIDTH,
1157 			B_ALIGN_VERTICAL_UNSET));
1158 	} else {
1159 		// align the menu bar left in the available space
1160 		fMenuBar->SetExplicitAlignment(BAlignment(B_ALIGN_LEFT,
1161 			B_ALIGN_VERTICAL_UNSET));
1162 	}
1163 
1164 	AddChild(fMenuBar);
1165 	fMenuBar->AddItem(menu);
1166 
1167 	fMenuBar->SetFont(be_plain_font);
1168 }
1169 
1170 
1171 void
1172 BMenuField::_InitMenuBar(const BMessage* archive)
1173 {
1174 	bool fixed;
1175 	if (archive->FindBool("be:fixeds", &fixed) == B_OK)
1176 		fFixedSizeMB = fixed;
1177 
1178 	fMenuBar = (BMenuBar*)FindView("_mc_mb_");
1179 	if (!fMenuBar) {
1180 		_InitMenuBar(new BMenu(""), BRect(0, 0, 100, 15), fFixedSizeMB);
1181 		InitObject2();
1182 	} else {
1183 		fMenuBar->AddFilter(new _BMCFilter_(this, B_MOUSE_DOWN));
1184 			// this is normally done in InitObject2()
1185 	}
1186 
1187 	fMenu = fMenuBar->SubmenuAt(0);
1188 
1189 	bool disable;
1190 	if (archive->FindBool("_disable", &disable) == B_OK)
1191 		SetEnabled(!disable);
1192 
1193 	bool dmark = false;
1194 	archive->FindBool("be:dmark", &dmark);
1195 	if (_BMCMenuBar_* menuBar = dynamic_cast<_BMCMenuBar_*>(fMenuBar))
1196 		menuBar->TogglePopUpMarker(dmark);
1197 }
1198 
1199 
1200 void
1201 BMenuField::_ValidateLayoutData()
1202 {
1203 	CALLED();
1204 
1205 	if (fLayoutData->valid)
1206 		return;
1207 
1208 	// cache font height
1209 	font_height& fh = fLayoutData->font_info;
1210 	GetFontHeight(&fh);
1211 
1212 	if (Label() != NULL) {
1213 		fLayoutData->label_width = ceilf(StringWidth(Label()));
1214 		fLayoutData->label_height = ceilf(fh.ascent) + ceilf(fh.descent);
1215 	} else {
1216 		fLayoutData->label_width = 0;
1217 		fLayoutData->label_height = 0;
1218 	}
1219 
1220 	// compute the minimal divider
1221 	float divider = 0;
1222 	if (fLayoutData->label_width > 0)
1223 		divider = fLayoutData->label_width + 5;
1224 
1225 	// If we shan't do real layout, we let the current divider take influence.
1226 	if (!(Flags() & B_SUPPORTS_LAYOUT))
1227 		divider = max_c(divider, fDivider);
1228 
1229 	// get the minimal (== preferred) menu bar size
1230 	// TODO: BMenu::MinSize() is using the ResizeMode() to decide the
1231 	// minimum width. If the mode is B_FOLLOW_LEFT_RIGHT, it will use the
1232 	// parent's frame width or window's frame width. So at least the returned
1233 	// size is wrong, but apparantly it doesn't have much bad effect.
1234 	fLayoutData->menu_bar_min = fMenuBar->MinSize();
1235 
1236 	TRACE("menu bar min width: %.2f\n", fLayoutData->menu_bar_min.width);
1237 
1238 	// compute our minimal (== preferred) size
1239 	BSize min(fLayoutData->menu_bar_min);
1240 	min.width += 2 * kVMargin;
1241 	min.height += 2 * kVMargin;
1242 
1243 	if (divider > 0)
1244 		min.width += divider;
1245 	if (fLayoutData->label_height > min.height)
1246 		min.height = fLayoutData->label_height;
1247 
1248 	fLayoutData->min = min;
1249 
1250 	fLayoutData->valid = true;
1251 	ResetLayoutInvalidation();
1252 
1253 	TRACE("width: %.2f, height: %.2f\n", min.width, min.height);
1254 }
1255 
1256 
1257 float
1258 BMenuField::_MenuBarOffset() const
1259 {
1260 	return max_c(kVMargin, fDivider + kVMargin);
1261 }
1262 
1263 
1264 float
1265 BMenuField::_MenuBarWidth() const
1266 {
1267 	return Bounds().Width() - (_MenuBarOffset() + kVMargin);
1268 }
1269 
1270 
1271 // #pragma mark -
1272 
1273 
1274 BMenuField::LabelLayoutItem::LabelLayoutItem(BMenuField* parent)
1275 	:
1276 	fParent(parent),
1277 	fFrame()
1278 {
1279 }
1280 
1281 
1282 BMenuField::LabelLayoutItem::LabelLayoutItem(BMessage* from)
1283 	:
1284 	BAbstractLayoutItem(from),
1285 	fParent(NULL),
1286 	fFrame()
1287 {
1288 	from->FindRect(kFrameField, &fFrame);
1289 }
1290 
1291 
1292 bool
1293 BMenuField::LabelLayoutItem::IsVisible()
1294 {
1295 	return !fParent->IsHidden(fParent);
1296 }
1297 
1298 
1299 void
1300 BMenuField::LabelLayoutItem::SetVisible(bool visible)
1301 {
1302 	// not allowed
1303 }
1304 
1305 
1306 BRect
1307 BMenuField::LabelLayoutItem::Frame()
1308 {
1309 	return fFrame;
1310 }
1311 
1312 
1313 void
1314 BMenuField::LabelLayoutItem::SetFrame(BRect frame)
1315 {
1316 	fFrame = frame;
1317 	fParent->_UpdateFrame();
1318 }
1319 
1320 
1321 void
1322 BMenuField::LabelLayoutItem::SetParent(BMenuField* parent)
1323 {
1324 	fParent = parent;
1325 }
1326 
1327 
1328 BView*
1329 BMenuField::LabelLayoutItem::View()
1330 {
1331 	return fParent;
1332 }
1333 
1334 
1335 BSize
1336 BMenuField::LabelLayoutItem::BaseMinSize()
1337 {
1338 	fParent->_ValidateLayoutData();
1339 
1340 	if (!fParent->Label())
1341 		return BSize(-1, -1);
1342 
1343 	return BSize(fParent->fLayoutData->label_width + 5,
1344 		fParent->fLayoutData->label_height);
1345 }
1346 
1347 
1348 BSize
1349 BMenuField::LabelLayoutItem::BaseMaxSize()
1350 {
1351 	return BaseMinSize();
1352 }
1353 
1354 
1355 BSize
1356 BMenuField::LabelLayoutItem::BasePreferredSize()
1357 {
1358 	return BaseMinSize();
1359 }
1360 
1361 
1362 BAlignment
1363 BMenuField::LabelLayoutItem::BaseAlignment()
1364 {
1365 	return BAlignment(B_ALIGN_USE_FULL_WIDTH, B_ALIGN_USE_FULL_HEIGHT);
1366 }
1367 
1368 
1369 status_t
1370 BMenuField::LabelLayoutItem::Archive(BMessage* into, bool deep) const
1371 {
1372 	BArchiver archiver(into);
1373 	status_t err = BAbstractLayoutItem::Archive(into, deep);
1374 
1375 	if (err == B_OK)
1376 		err = into->AddRect(kFrameField, fFrame);
1377 
1378 	return archiver.Finish(err);
1379 }
1380 
1381 
1382 BArchivable*
1383 BMenuField::LabelLayoutItem::Instantiate(BMessage* from)
1384 {
1385 	if (validate_instantiation(from, "BMenuField::LabelLayoutItem"))
1386 		return new LabelLayoutItem(from);
1387 	return NULL;
1388 }
1389 
1390 
1391 // #pragma mark -
1392 
1393 
1394 BMenuField::MenuBarLayoutItem::MenuBarLayoutItem(BMenuField* parent)
1395 	:
1396 	fParent(parent),
1397 	fFrame()
1398 {
1399 	// by default the part right of the divider shall have an unlimited maximum
1400 	// width
1401 	SetExplicitMaxSize(BSize(B_SIZE_UNLIMITED, B_SIZE_UNSET));
1402 }
1403 
1404 
1405 BMenuField::MenuBarLayoutItem::MenuBarLayoutItem(BMessage* from)
1406 	:
1407 	BAbstractLayoutItem(from),
1408 	fParent(NULL),
1409 	fFrame()
1410 {
1411 	from->FindRect(kFrameField, &fFrame);
1412 }
1413 
1414 
1415 bool
1416 BMenuField::MenuBarLayoutItem::IsVisible()
1417 {
1418 	return !fParent->IsHidden(fParent);
1419 }
1420 
1421 
1422 void
1423 BMenuField::MenuBarLayoutItem::SetVisible(bool visible)
1424 {
1425 	// not allowed
1426 }
1427 
1428 
1429 BRect
1430 BMenuField::MenuBarLayoutItem::Frame()
1431 {
1432 	return fFrame;
1433 }
1434 
1435 
1436 void
1437 BMenuField::MenuBarLayoutItem::SetFrame(BRect frame)
1438 {
1439 	fFrame = frame;
1440 	fParent->_UpdateFrame();
1441 }
1442 
1443 
1444 void
1445 BMenuField::MenuBarLayoutItem::SetParent(BMenuField* parent)
1446 {
1447 	fParent = parent;
1448 }
1449 
1450 
1451 BView*
1452 BMenuField::MenuBarLayoutItem::View()
1453 {
1454 	return fParent;
1455 }
1456 
1457 
1458 BSize
1459 BMenuField::MenuBarLayoutItem::BaseMinSize()
1460 {
1461 	fParent->_ValidateLayoutData();
1462 
1463 	BSize size = fParent->fLayoutData->menu_bar_min;
1464 	size.width += 2 * kVMargin;
1465 	size.height += 2 * kVMargin;
1466 
1467 	return size;
1468 }
1469 
1470 
1471 BSize
1472 BMenuField::MenuBarLayoutItem::BaseMaxSize()
1473 {
1474 	BSize size(BaseMinSize());
1475 	size.width = B_SIZE_UNLIMITED;
1476 	return size;
1477 }
1478 
1479 
1480 BSize
1481 BMenuField::MenuBarLayoutItem::BasePreferredSize()
1482 {
1483 	return BaseMinSize();
1484 }
1485 
1486 
1487 BAlignment
1488 BMenuField::MenuBarLayoutItem::BaseAlignment()
1489 {
1490 	return BAlignment(B_ALIGN_USE_FULL_WIDTH, B_ALIGN_USE_FULL_HEIGHT);
1491 }
1492 
1493 
1494 status_t
1495 BMenuField::MenuBarLayoutItem::Archive(BMessage* into, bool deep) const
1496 {
1497 	BArchiver archiver(into);
1498 	status_t err = BAbstractLayoutItem::Archive(into, deep);
1499 
1500 	if (err == B_OK)
1501 		err = into->AddRect(kFrameField, fFrame);
1502 
1503 	return archiver.Finish(err);
1504 }
1505 
1506 
1507 BArchivable*
1508 BMenuField::MenuBarLayoutItem::Instantiate(BMessage* from)
1509 {
1510 	if (validate_instantiation(from, "BMenuField::MenuBarLayoutItem"))
1511 		return new MenuBarLayoutItem(from);
1512 	return NULL;
1513 }
1514 
1515