xref: /haiku/src/kits/interface/Box.cpp (revision 9642f7705b27e5c270c15fa526d14e1848c2c27d) 
1 /*
2  * Copyright 2001-2017 Haiku, Inc. All Rights Reserved.
3  * Distributed under the terms of the MIT license.
4  *
5  * Authors:
6  *		Stephan Aßmus, superstippi@gmx.de
7  *		DarkWyrm, bpmagic@columbus.rr.com
8  *		Axel Dörfler, axeld@pinc-software.de
9  *		Marc Flerackers, mflerackers@androme.be
10  *		John Scipione, jscipione@gmail.com
11  */
12 
13 
14 #include <Box.h>
15 
16 #include <stdio.h>
17 #include <stdlib.h>
18 #include <string.h>
19 
20 #include <ControlLook.h>
21 #include <Layout.h>
22 #include <LayoutUtils.h>
23 #include <Message.h>
24 #include <Region.h>
25 
26 #include <binary_compatibility/Interface.h>
27 
28 
29 struct BBox::LayoutData {
30 	LayoutData()
31 		: valid(false)
32 	{
33 	}
34 
35 	BRect	label_box;		// label box (label string or label view); in case
36 							// of a label string not including descent
37 	BRect	insets;			// insets induced by border and label
38 	BSize	min;
39 	BSize	max;
40 	BSize	preferred;
41 	BAlignment alignment;
42 	bool	valid;			// validity the other fields
43 };
44 
45 
46 BBox::BBox(BRect frame, const char* name, uint32 resizingMode, uint32 flags,
47 		border_style border)
48 	:
49 	BView(frame, name, resizingMode, flags  | B_WILL_DRAW | B_FRAME_EVENTS),
50 	  fStyle(border)
51 {
52 	_InitObject();
53 }
54 
55 
56 BBox::BBox(const char* name, uint32 flags, border_style border, BView* child)
57 	:
58 	BView(name, flags | B_WILL_DRAW | B_FRAME_EVENTS),
59 	fStyle(border)
60 {
61 	_InitObject();
62 
63 	if (child)
64 		AddChild(child);
65 }
66 
67 
68 BBox::BBox(border_style border, BView* child)
69 	:
70 	BView(NULL, B_WILL_DRAW | B_FRAME_EVENTS | B_NAVIGABLE_JUMP),
71 	fStyle(border)
72 {
73 	_InitObject();
74 
75 	if (child)
76 		AddChild(child);
77 }
78 
79 
80 BBox::BBox(BMessage* archive)
81 	:
82 	BView(archive),
83 	fStyle(B_FANCY_BORDER)
84 {
85 	_InitObject(archive);
86 }
87 
88 
89 BBox::~BBox()
90 {
91 	_ClearLabel();
92 
93 	delete fLayoutData;
94 }
95 
96 
97 BArchivable*
98 BBox::Instantiate(BMessage* archive)
99 {
100 	if (validate_instantiation(archive, "BBox"))
101 		return new BBox(archive);
102 
103 	return NULL;
104 }
105 
106 
107 status_t
108 BBox::Archive(BMessage* archive, bool deep) const
109 {
110 	status_t ret = BView::Archive(archive, deep);
111 
112 	if (fLabel && ret == B_OK)
113 		ret = archive->AddString("_label", fLabel);
114 
115 	if (fLabelView && ret == B_OK)
116 		ret = archive->AddBool("_lblview", true);
117 
118 	if (fStyle != B_FANCY_BORDER && ret == B_OK)
119 		ret = archive->AddInt32("_style", fStyle);
120 
121 	return ret;
122 }
123 
124 
125 void
126 BBox::SetBorder(border_style border)
127 {
128 	if (border == fStyle)
129 		return;
130 
131 	fStyle = border;
132 
133 	InvalidateLayout();
134 
135 	if (Window() != NULL && LockLooper()) {
136 		Invalidate();
137 		UnlockLooper();
138 	}
139 }
140 
141 
142 border_style
143 BBox::Border() const
144 {
145 	return fStyle;
146 }
147 
148 
149 //! This function is not part of the R5 API and is not yet finalized yet
150 float
151 BBox::TopBorderOffset()
152 {
153 	_ValidateLayoutData();
154 
155 	if (fLabel != NULL || fLabelView != NULL)
156 		return fLayoutData->label_box.Height() / 2;
157 
158 	return 0;
159 }
160 
161 
162 //! This function is not part of the R5 API and is not yet finalized yet
163 BRect
164 BBox::InnerFrame()
165 {
166 	_ValidateLayoutData();
167 
168 	BRect frame(Bounds());
169 	frame.left += fLayoutData->insets.left;
170 	frame.top += fLayoutData->insets.top;
171 	frame.right -= fLayoutData->insets.right;
172 	frame.bottom -= fLayoutData->insets.bottom;
173 
174 	return frame;
175 }
176 
177 
178 void
179 BBox::SetLabel(const char* string)
180 {
181 	_ClearLabel();
182 
183 	if (string)
184 		fLabel = strdup(string);
185 
186 	InvalidateLayout();
187 
188 	if (Window())
189 		Invalidate();
190 }
191 
192 
193 status_t
194 BBox::SetLabel(BView* viewLabel)
195 {
196 	_ClearLabel();
197 
198 	if (viewLabel) {
199 		fLabelView = viewLabel;
200 		fLabelView->MoveTo(10.0f, 0.0f);
201 		AddChild(fLabelView, ChildAt(0));
202 	}
203 
204 	InvalidateLayout();
205 
206 	if (Window())
207 		Invalidate();
208 
209 	return B_OK;
210 }
211 
212 
213 const char*
214 BBox::Label() const
215 {
216 	return fLabel;
217 }
218 
219 
220 BView*
221 BBox::LabelView() const
222 {
223 	return fLabelView;
224 }
225 
226 
227 void
228 BBox::Draw(BRect updateRect)
229 {
230 	_ValidateLayoutData();
231 
232 	PushState();
233 
234 	BRect labelBox = BRect(0, 0, 0, 0);
235 	if (fLabel != NULL) {
236 		labelBox = fLayoutData->label_box;
237 		BRegion update(updateRect);
238 		update.Exclude(labelBox);
239 
240 		ConstrainClippingRegion(&update);
241 	} else if (fLabelView != NULL)
242 		labelBox = fLabelView->Bounds();
243 
244 	switch (fStyle) {
245 		case B_FANCY_BORDER:
246 			_DrawFancy(labelBox);
247 			break;
248 
249 		case B_PLAIN_BORDER:
250 			_DrawPlain(labelBox);
251 			break;
252 
253 		default:
254 			break;
255 	}
256 
257 	if (fLabel) {
258 		ConstrainClippingRegion(NULL);
259 
260 		font_height fontHeight;
261 		GetFontHeight(&fontHeight);
262 
263 		SetHighColor(ui_color(B_PANEL_TEXT_COLOR));
264 		DrawString(fLabel, BPoint(10.0f, ceilf(fontHeight.ascent)));
265 	}
266 
267 	PopState();
268 }
269 
270 
271 void
272 BBox::AttachedToWindow()
273 {
274 	AdoptParentColors();
275 
276 	// Force low color to match view color for proper label drawing.
277 	float viewTint = B_NO_TINT;
278 	float lowTint = B_NO_TINT;
279 
280 	if (LowUIColor(&lowTint) != ViewUIColor(&viewTint) || viewTint != lowTint)
281 		SetLowUIColor(ViewUIColor(), viewTint);
282 	else if (LowColor() != ViewColor())
283 		SetLowColor(ViewColor());
284 
285 	if (ViewColor() == B_TRANSPARENT_COLOR)
286 		AdoptSystemColors();
287 
288 	// The box could have been resized in the mean time
289 	fBounds = Bounds().OffsetToCopy(0, 0);
290 }
291 
292 
293 void
294 BBox::DetachedFromWindow()
295 {
296 	BView::DetachedFromWindow();
297 }
298 
299 
300 void
301 BBox::AllAttached()
302 {
303 	BView::AllAttached();
304 }
305 
306 
307 void
308 BBox::AllDetached()
309 {
310 	BView::AllDetached();
311 }
312 
313 
314 void
315 BBox::FrameResized(float width, float height)
316 {
317 	BRect bounds(Bounds());
318 
319 	// invalidate the regions that the app_server did not
320 	// (for removing the previous or drawing the new border)
321 	if (fStyle != B_NO_BORDER) {
322 		// TODO: this must be made part of the be_control_look stuff!
323 		int32 borderSize = fStyle == B_PLAIN_BORDER ? 0 : 2;
324 
325 		// Horizontal
326 		BRect invalid(bounds);
327 		if (fBounds.Width() < bounds.Width()) {
328 			// enlarging
329 			invalid.left = bounds.left + fBounds.right - borderSize;
330 			invalid.right = bounds.left + fBounds.right;
331 
332 			Invalidate(invalid);
333 		} else if (fBounds.Width() > bounds.Width()) {
334 			// shrinking
335 			invalid.left = bounds.left + bounds.right - borderSize;
336 
337 			Invalidate(invalid);
338 		}
339 
340 		// Vertical
341 		invalid = bounds;
342 		if (fBounds.Height() < bounds.Height()) {
343 			// enlarging
344 			invalid.top = bounds.top + fBounds.bottom - borderSize;
345 			invalid.bottom = bounds.top + fBounds.bottom;
346 
347 			Invalidate(invalid);
348 		} else if (fBounds.Height() > bounds.Height()) {
349 			// shrinking
350 			invalid.top = bounds.top + bounds.bottom - borderSize;
351 
352 			Invalidate(invalid);
353 		}
354 	}
355 
356 	fBounds.right = width;
357 	fBounds.bottom = height;
358 }
359 
360 
361 void
362 BBox::MessageReceived(BMessage* message)
363 {
364 	BView::MessageReceived(message);
365 }
366 
367 
368 void
369 BBox::MouseDown(BPoint point)
370 {
371 	BView::MouseDown(point);
372 }
373 
374 
375 void
376 BBox::MouseUp(BPoint point)
377 {
378 	BView::MouseUp(point);
379 }
380 
381 
382 void
383 BBox::WindowActivated(bool active)
384 {
385 	BView::WindowActivated(active);
386 }
387 
388 
389 void
390 BBox::MouseMoved(BPoint point, uint32 transit, const BMessage* message)
391 {
392 	BView::MouseMoved(point, transit, message);
393 }
394 
395 
396 void
397 BBox::FrameMoved(BPoint newLocation)
398 {
399 	BView::FrameMoved(newLocation);
400 }
401 
402 
403 BHandler*
404 BBox::ResolveSpecifier(BMessage* message, int32 index, BMessage* specifier,
405 	int32 what, const char* property)
406 {
407 	return BView::ResolveSpecifier(message, index, specifier, what, property);
408 }
409 
410 
411 void
412 BBox::ResizeToPreferred()
413 {
414 	float width, height;
415 	GetPreferredSize(&width, &height);
416 
417 	// make sure the box don't get smaller than it already is
418 	if (width < Bounds().Width())
419 		width = Bounds().Width();
420 	if (height < Bounds().Height())
421 		height = Bounds().Height();
422 
423 	BView::ResizeTo(width, height);
424 }
425 
426 
427 void
428 BBox::GetPreferredSize(float* _width, float* _height)
429 {
430 	_ValidateLayoutData();
431 
432 	if (_width)
433 		*_width = fLayoutData->preferred.width;
434 	if (_height)
435 		*_height = fLayoutData->preferred.height;
436 }
437 
438 
439 void
440 BBox::MakeFocus(bool focused)
441 {
442 	BView::MakeFocus(focused);
443 }
444 
445 
446 status_t
447 BBox::GetSupportedSuites(BMessage* message)
448 {
449 	return BView::GetSupportedSuites(message);
450 }
451 
452 
453 status_t
454 BBox::Perform(perform_code code, void* _data)
455 {
456 	switch (code) {
457 		case PERFORM_CODE_MIN_SIZE:
458 			((perform_data_min_size*)_data)->return_value
459 				= BBox::MinSize();
460 			return B_OK;
461 		case PERFORM_CODE_MAX_SIZE:
462 			((perform_data_max_size*)_data)->return_value
463 				= BBox::MaxSize();
464 			return B_OK;
465 		case PERFORM_CODE_PREFERRED_SIZE:
466 			((perform_data_preferred_size*)_data)->return_value
467 				= BBox::PreferredSize();
468 			return B_OK;
469 		case PERFORM_CODE_LAYOUT_ALIGNMENT:
470 			((perform_data_layout_alignment*)_data)->return_value
471 				= BBox::LayoutAlignment();
472 			return B_OK;
473 		case PERFORM_CODE_HAS_HEIGHT_FOR_WIDTH:
474 			((perform_data_has_height_for_width*)_data)->return_value
475 				= BBox::HasHeightForWidth();
476 			return B_OK;
477 		case PERFORM_CODE_GET_HEIGHT_FOR_WIDTH:
478 		{
479 			perform_data_get_height_for_width* data
480 				= (perform_data_get_height_for_width*)_data;
481 			BBox::GetHeightForWidth(data->width, &data->min, &data->max,
482 				&data->preferred);
483 			return B_OK;
484 		}
485 		case PERFORM_CODE_SET_LAYOUT:
486 		{
487 			perform_data_set_layout* data = (perform_data_set_layout*)_data;
488 			BBox::SetLayout(data->layout);
489 			return B_OK;
490 		}
491 		case PERFORM_CODE_LAYOUT_INVALIDATED:
492 		{
493 			perform_data_layout_invalidated* data
494 				= (perform_data_layout_invalidated*)_data;
495 			BBox::LayoutInvalidated(data->descendants);
496 			return B_OK;
497 		}
498 		case PERFORM_CODE_DO_LAYOUT:
499 		{
500 			BBox::DoLayout();
501 			return B_OK;
502 		}
503 	}
504 
505 	return BView::Perform(code, _data);
506 }
507 
508 
509 BSize
510 BBox::MinSize()
511 {
512 	_ValidateLayoutData();
513 
514 	BSize size = (GetLayout() ? GetLayout()->MinSize() : fLayoutData->min);
515 	if (size.width < fLayoutData->min.width)
516 		size.width = fLayoutData->min.width;
517 	return BLayoutUtils::ComposeSize(ExplicitMinSize(), size);
518 }
519 
520 
521 BSize
522 BBox::MaxSize()
523 {
524 	_ValidateLayoutData();
525 
526 	BSize size = (GetLayout() ? GetLayout()->MaxSize() : fLayoutData->max);
527 	return BLayoutUtils::ComposeSize(ExplicitMaxSize(), size);
528 }
529 
530 
531 BSize
532 BBox::PreferredSize()
533 {
534 	_ValidateLayoutData();
535 
536 	BSize size = (GetLayout() ? GetLayout()->PreferredSize()
537 		: fLayoutData->preferred);
538 	return BLayoutUtils::ComposeSize(ExplicitPreferredSize(), size);
539 }
540 
541 
542 BAlignment
543 BBox::LayoutAlignment()
544 {
545 	_ValidateLayoutData();
546 
547 	BAlignment alignment = (GetLayout() ? GetLayout()->Alignment()
548 			: fLayoutData->alignment);
549 	return BLayoutUtils::ComposeAlignment(ExplicitAlignment(), alignment);
550 }
551 
552 
553 void
554 BBox::LayoutInvalidated(bool descendants)
555 {
556 	fLayoutData->valid = false;
557 }
558 
559 
560 void
561 BBox::DoLayout()
562 {
563 	// Bail out, if we shan't do layout.
564 	if (!(Flags() & B_SUPPORTS_LAYOUT))
565 		return;
566 
567 	BLayout* layout = GetLayout();
568 
569 	// If the user set a layout, let the base class version call its
570 	// hook. In case when we have BView as a label, remove it from child list
571 	// so it won't be layouted with the rest of views and add it again
572 	// after that.
573 	if (layout != NULL) {
574 		if (fLabelView)
575 			RemoveChild(fLabelView);
576 
577 		BView::DoLayout();
578 
579 		if (fLabelView != NULL) {
580 			DisableLayoutInvalidation();
581 				// don't trigger a relayout
582 			AddChild(fLabelView, ChildAt(0));
583 			EnableLayoutInvalidation();
584 		}
585 	}
586 
587 	_ValidateLayoutData();
588 
589 	// Even if the user set a layout, restore label view to it's
590 	// desired position.
591 
592 	// layout the label view
593 	if (fLabelView != NULL) {
594 		fLabelView->MoveTo(fLayoutData->label_box.LeftTop());
595 		fLabelView->ResizeTo(fLayoutData->label_box.Size());
596 	}
597 
598 	// If we have layout return here and do not layout the child
599 	if (layout != NULL)
600 		return;
601 
602 	// layout the child
603 	BView* child = _Child();
604 	if (child != NULL) {
605 		BRect frame(Bounds());
606 		frame.left += fLayoutData->insets.left;
607 		frame.top += fLayoutData->insets.top;
608 		frame.right -= fLayoutData->insets.right;
609 		frame.bottom -= fLayoutData->insets.bottom;
610 
611 		if ((child->Flags() & B_SUPPORTS_LAYOUT) != 0)
612 			BLayoutUtils::AlignInFrame(child, frame);
613 		else
614 			child->MoveTo(frame.LeftTop());
615 	}
616 }
617 
618 
619 void BBox::_ReservedBox1() {}
620 void BBox::_ReservedBox2() {}
621 
622 
623 BBox &
624 BBox::operator=(const BBox &)
625 {
626 	return *this;
627 }
628 
629 
630 void
631 BBox::_InitObject(BMessage* archive)
632 {
633 	fBounds = Bounds().OffsetToCopy(0, 0);
634 
635 	fLabel = NULL;
636 	fLabelView = NULL;
637 	fLayoutData = new LayoutData;
638 
639 	int32 flags = 0;
640 
641 	BFont font(be_bold_font);
642 
643 	if (!archive || !archive->HasString("_fname"))
644 		flags = B_FONT_FAMILY_AND_STYLE;
645 
646 	if (!archive || !archive->HasFloat("_fflt"))
647 		flags |= B_FONT_SIZE;
648 
649 	if (flags != 0)
650 		SetFont(&font, flags);
651 
652 	if (archive != NULL) {
653 		const char* string;
654 		if (archive->FindString("_label", &string) == B_OK)
655 			SetLabel(string);
656 
657 		bool fancy;
658 		int32 style;
659 
660 		if (archive->FindBool("_style", &fancy) == B_OK)
661 			fStyle = fancy ? B_FANCY_BORDER : B_PLAIN_BORDER;
662 		else if (archive->FindInt32("_style", &style) == B_OK)
663 			fStyle = (border_style)style;
664 
665 		bool hasLabelView;
666 		if (archive->FindBool("_lblview", &hasLabelView) == B_OK)
667 			fLabelView = ChildAt(0);
668 	}
669 
670 	AdoptSystemColors();
671 }
672 
673 
674 void
675 BBox::_DrawPlain(BRect labelBox)
676 {
677 	BRect rect = Bounds();
678 	rect.top += TopBorderOffset();
679 
680 	float lightTint;
681 	float shadowTint;
682 	lightTint = B_LIGHTEN_1_TINT;
683 	shadowTint = B_DARKEN_1_TINT;
684 
685 	if (rect.Height() == 0.0 || rect.Width() == 0.0) {
686 		// used as separator
687 		rgb_color shadow = tint_color(ViewColor(), B_DARKEN_2_TINT);
688 
689 		SetHighColor(shadow);
690 		StrokeLine(rect.LeftTop(),rect.RightBottom());
691 	} else {
692 		// used as box
693 		rgb_color light = tint_color(ViewColor(), lightTint);
694 		rgb_color shadow = tint_color(ViewColor(), shadowTint);
695 
696 		BeginLineArray(4);
697 			AddLine(BPoint(rect.left, rect.bottom),
698 					BPoint(rect.left, rect.top), light);
699 			AddLine(BPoint(rect.left + 1.0f, rect.top),
700 					BPoint(rect.right, rect.top), light);
701 			AddLine(BPoint(rect.left + 1.0f, rect.bottom),
702 					BPoint(rect.right, rect.bottom), shadow);
703 			AddLine(BPoint(rect.right, rect.bottom - 1.0f),
704 					BPoint(rect.right, rect.top + 1.0f), shadow);
705 		EndLineArray();
706 	}
707 }
708 
709 
710 void
711 BBox::_DrawFancy(BRect labelBox)
712 {
713 	BRect rect = Bounds();
714 	rect.top += TopBorderOffset();
715 
716 	rgb_color base = ViewColor();
717 	if (rect.Height() == 1.0) {
718 		// used as horizontal separator
719 		be_control_look->DrawGroupFrame(this, rect, rect, base,
720 			BControlLook::B_TOP_BORDER);
721 	} else if (rect.Width() == 1.0) {
722 		// used as vertical separator
723 		be_control_look->DrawGroupFrame(this, rect, rect, base,
724 			BControlLook::B_LEFT_BORDER);
725 	} else {
726 		// used as box
727 		be_control_look->DrawGroupFrame(this, rect, rect, base);
728 	}
729 }
730 
731 
732 void
733 BBox::_ClearLabel()
734 {
735 	if (fLabel) {
736 		free(fLabel);
737 		fLabel = NULL;
738 	} else if (fLabelView) {
739 		fLabelView->RemoveSelf();
740 		delete fLabelView;
741 		fLabelView = NULL;
742 	}
743 }
744 
745 
746 BView*
747 BBox::_Child() const
748 {
749 	for (int32 i = 0; BView* view = ChildAt(i); i++) {
750 		if (view != fLabelView)
751 			return view;
752 	}
753 
754 	return NULL;
755 }
756 
757 
758 void
759 BBox::_ValidateLayoutData()
760 {
761 	if (fLayoutData->valid)
762 		return;
763 
764 	// compute the label box, width and height
765 	bool label = true;
766 	float labelHeight = 0;	// height of the label (pixel count)
767 	if (fLabel) {
768 		// leave 6 pixels of the frame, and have a gap of 4 pixels between
769 		// the frame and the text on either side
770 		font_height fontHeight;
771 		GetFontHeight(&fontHeight);
772 		fLayoutData->label_box.Set(6.0f, 0, 14.0f + StringWidth(fLabel),
773 			ceilf(fontHeight.ascent));
774 		labelHeight = ceilf(fontHeight.ascent + fontHeight.descent) + 1;
775 	} else if (fLabelView) {
776 		// the label view is placed at (0, 10) at its preferred size
777 		BSize size = fLabelView->PreferredSize();
778 		fLayoutData->label_box.Set(10, 0, 10 + size.width, size.height);
779 		labelHeight = size.height + 1;
780 	} else
781 		label = false;
782 
783 	// border
784 	switch (fStyle) {
785 		case B_PLAIN_BORDER:
786 			fLayoutData->insets.Set(1, 1, 1, 1);
787 			break;
788 		case B_FANCY_BORDER:
789 			fLayoutData->insets.Set(3, 3, 3, 3);
790 			break;
791 		case B_NO_BORDER:
792 		default:
793 			fLayoutData->insets.Set(0, 0, 0, 0);
794 			break;
795 	}
796 
797 	// if there's a label, the top inset will be dictated by the label
798 	if (label && labelHeight > fLayoutData->insets.top)
799 		fLayoutData->insets.top = labelHeight;
800 
801 	// total number of pixel the border adds
802 	float addWidth = fLayoutData->insets.left + fLayoutData->insets.right;
803 	float addHeight = fLayoutData->insets.top + fLayoutData->insets.bottom;
804 
805 	// compute the minimal width induced by the label
806 	float minWidth;
807 	if (label)
808 		minWidth = fLayoutData->label_box.right + fLayoutData->insets.right;
809 	else
810 		minWidth = addWidth - 1;
811 
812 	BAlignment alignment(B_ALIGN_HORIZONTAL_CENTER, B_ALIGN_VERTICAL_CENTER);
813 
814 	// finally consider the child constraints, if we shall support layout
815 	BView* child = _Child();
816 	if (child && (child->Flags() & B_SUPPORTS_LAYOUT)) {
817 		BSize min = child->MinSize();
818 		BSize max = child->MaxSize();
819 		BSize preferred = child->PreferredSize();
820 
821 		min.width += addWidth;
822 		min.height += addHeight;
823 		preferred.width += addWidth;
824 		preferred.height += addHeight;
825 		max.width = BLayoutUtils::AddDistances(max.width, addWidth - 1);
826 		max.height = BLayoutUtils::AddDistances(max.height, addHeight - 1);
827 
828 		if (min.width < minWidth)
829 			min.width = minWidth;
830 		BLayoutUtils::FixSizeConstraints(min, max, preferred);
831 
832 		fLayoutData->min = min;
833 		fLayoutData->max = max;
834 		fLayoutData->preferred = preferred;
835 
836 		BAlignment childAlignment = child->LayoutAlignment();
837 		if (childAlignment.horizontal == B_ALIGN_USE_FULL_WIDTH)
838 			alignment.horizontal = B_ALIGN_USE_FULL_WIDTH;
839 		if (childAlignment.vertical == B_ALIGN_USE_FULL_HEIGHT)
840 			alignment.vertical = B_ALIGN_USE_FULL_HEIGHT;
841 
842 		fLayoutData->alignment = alignment;
843 	} else {
844 		fLayoutData->min.Set(minWidth, addHeight - 1);
845 		fLayoutData->max.Set(B_SIZE_UNLIMITED, B_SIZE_UNLIMITED);
846 		fLayoutData->preferred = fLayoutData->min;
847 		fLayoutData->alignment = alignment;
848 	}
849 
850 	fLayoutData->valid = true;
851 	ResetLayoutInvalidation();
852 }
853 
854 
855 extern "C" void
856 B_IF_GCC_2(InvalidateLayout__4BBoxb, _ZN4BBox16InvalidateLayoutEb)(
857 	BBox* box, bool descendants)
858 {
859 	perform_data_layout_invalidated data;
860 	data.descendants = descendants;
861 
862 	box->Perform(PERFORM_CODE_LAYOUT_INVALIDATED, &data);
863 }
864 
865