qlayout.cpp

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2**-
3** Copyright (C) 2015 The Qt Company Ltd.-
4** Contact: http://www.qt.io/licensing/-
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32****************************************************************************/-
33-
34#include "qlayout.h"-
35-
36#include "qapplication.h"-
37#include "qlayoutengine_p.h"-
38#include "qmenubar.h"-
39#include "qtoolbar.h"-
40#include "qsizegrip.h"-
41#include "qevent.h"-
42#include "qstyle.h"-
43#include "qvariant.h"-
44#include "qwidget_p.h"-
45#include "qlayout_p.h"-
46#include "qformlayout.h"-
47-
48QT_BEGIN_NAMESPACE-
49-
50static int menuBarHeightForWidth(QWidget *menubar, int w)-
51{-
52 if (menubar && !menubar->isHidden() && !menubar->isWindow()) {
menubarDescription
TRUEnever evaluated
FALSEnever evaluated
!menubar->isHidden()Description
TRUEnever evaluated
FALSEnever evaluated
!menubar->isWindow()Description
TRUEnever evaluated
FALSEnever evaluated
0
53 int result = menubar->heightForWidth(qMax(w, menubar->minimumWidth()));-
54 if (result == -1)
result == -1Description
TRUEnever evaluated
FALSEnever evaluated
0
55 result = menubar->sizeHint().height();
never executed: result = menubar->sizeHint().height();
0
56 const int min = qSmartMinSize(menubar).height();-
57 result = qBound(min, result, menubar->maximumSize().height());-
58 if (result != -1)
result != -1Description
TRUEnever evaluated
FALSEnever evaluated
0
59 return result;
never executed: return result;
0
60 }
never executed: end of block
0
61 return 0;
never executed: return 0;
0
62}-
63-
64/*!-
65 \class QLayout-
66 \brief The QLayout class is the base class of geometry managers.-
67-
68 \ingroup geomanagement-
69 \inmodule QtWidgets-
70-
71 This is an abstract base class inherited by the concrete classes-
72 QBoxLayout, QGridLayout, QFormLayout, and QStackedLayout.-
73-
74 For users of QLayout subclasses or of QMainWindow there is seldom-
75 any need to use the basic functions provided by QLayout, such as-
76 setSizeConstraint() or setMenuBar(). See \l{Layout Management}-
77 for more information.-
78-
79 To make your own layout manager, implement the functions-
80 addItem(), sizeHint(), setGeometry(), itemAt() and takeAt(). You-
81 should also implement minimumSize() to ensure your layout isn't-
82 resized to zero size if there is too little space. To support-
83 children whose heights depend on their widths, implement-
84 hasHeightForWidth() and heightForWidth(). See the-
85 \l{layouts/borderlayout}{Border Layout} and-
86 \l{layouts/flowlayout}{Flow Layout} examples for-
87 more information about implementing custom layout managers.-
88-
89 Geometry management stops when the layout manager is deleted.-
90-
91 \sa QLayoutItem, {Layout Management}, {Basic Layouts Example},-
92 {Border Layout Example}, {Flow Layout Example}-
93*/-
94-
95-
96/*!-
97 Constructs a new top-level QLayout, with parent \a parent.-
98 \a parent may not be 0.-
99-
100 There can be only one top-level layout for a widget. It is-
101 returned by QWidget::layout().-
102*/-
103QLayout::QLayout(QWidget *parent)-
104 : QObject(*new QLayoutPrivate, parent)-
105{-
106 if (!parent)
!parentDescription
TRUEnever evaluated
FALSEnever evaluated
0
107 return;
never executed: return;
0
108 parent->setLayout(this);-
109}
never executed: end of block
0
110-
111/*!-
112 Constructs a new child QLayout.-
113-
114 This layout has to be inserted into another layout before geometry-
115 management will work.-
116*/-
117QLayout::QLayout()-
118 : QObject(*new QLayoutPrivate, 0)-
119{-
120}
never executed: end of block
0
121-
122-
123/*! \internal-
124 */-
125QLayout::QLayout(QLayoutPrivate &dd, QLayout *lay, QWidget *w)-
126 : QObject(dd, lay ? static_cast<QObject*>(lay) : static_cast<QObject*>(w))-
127{-
128 Q_D(QLayout);-
129 if (lay) {
layDescription
TRUEnever evaluated
FALSEnever evaluated
0
130 lay->addItem(this);-
131 } else if (w) {
never executed: end of block
wDescription
TRUEnever evaluated
FALSEnever evaluated
0
132 if (w->layout()) {
w->layout()Description
TRUEnever evaluated
FALSEnever evaluated
0
133 qWarning("QLayout: Attempting to add QLayout \"%s\" to %s \"%s\", which"-
134 " already has a layout",-
135 qPrintable(QObject::objectName()), w->metaObject()->className(),-
136 w->objectName().toLocal8Bit().data());-
137 setParent(0);-
138 } else {
never executed: end of block
0
139 d->topLevel = true;-
140 w->d_func()->layout = this;-
141 QT_TRY {-
142 invalidate();-
143 } QT_CATCH(...) {
never executed: end of block
dead code: { w->d_func()->layout = 0; qt_noop(); }
-
144 w->d_func()->layout = 0;
dead code: { w->d_func()->layout = 0; qt_noop(); }
-
145 QT_RETHROW;
dead code: { w->d_func()->layout = 0; qt_noop(); }
-
146 }
dead code: { w->d_func()->layout = 0; qt_noop(); }
-
147 }-
148 }-
149}
never executed: end of block
0
150-
151QLayoutPrivate::QLayoutPrivate()-
152 : QObjectPrivate(), insideSpacing(-1), userLeftMargin(-1), userTopMargin(-1), userRightMargin(-1),-
153 userBottomMargin(-1), topLevel(false), enabled(true), activated(true), autoNewChild(false),-
154 constraint(QLayout::SetDefaultConstraint), menubar(0)-
155{-
156}
never executed: end of block
0
157-
158void QLayoutPrivate::getMargin(int *result, int userMargin, QStyle::PixelMetric pm) const-
159{-
160 if (!result)
!resultDescription
TRUEnever evaluated
FALSEnever evaluated
0
161 return;
never executed: return;
0
162-
163 Q_Q(const QLayout);-
164 if (userMargin >= 0) {
userMargin >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
165 *result = userMargin;-
166 } else if (!topLevel) {
never executed: end of block
!topLevelDescription
TRUEnever evaluated
FALSEnever evaluated
0
167 *result = 0;-
168 } else if (QWidget *pw = q->parentWidget()) {
never executed: end of block
QWidget *pw = ...parentWidget()Description
TRUEnever evaluated
FALSEnever evaluated
0
169 *result = pw->style()->pixelMetric(pm, 0, pw);-
170 } else {
never executed: end of block
0
171 *result = 0;-
172 }
never executed: end of block
0
173}-
174-
175// Static item factory functions that allow for hooking things in Designer-
176-
177QLayoutPrivate::QWidgetItemFactoryMethod QLayoutPrivate::widgetItemFactoryMethod = 0;-
178QLayoutPrivate::QSpacerItemFactoryMethod QLayoutPrivate::spacerItemFactoryMethod = 0;-
179-
180QWidgetItem *QLayoutPrivate::createWidgetItem(const QLayout *layout, QWidget *widget)-
181{-
182 if (widgetItemFactoryMethod)
widgetItemFactoryMethodDescription
TRUEnever evaluated
FALSEnever evaluated
0
183 if (QWidgetItem *wi = (*widgetItemFactoryMethod)(layout, widget))
QWidgetItem *w...ayout, widget)Description
TRUEnever evaluated
FALSEnever evaluated
0
184 return wi;
never executed: return wi;
0
185 return new QWidgetItemV2(widget);
never executed: return new QWidgetItemV2(widget);
0
186}-
187-
188QSpacerItem *QLayoutPrivate::createSpacerItem(const QLayout *layout, int w, int h, QSizePolicy::Policy hPolicy, QSizePolicy::Policy vPolicy)-
189{-
190 if (spacerItemFactoryMethod)
spacerItemFactoryMethodDescription
TRUEnever evaluated
FALSEnever evaluated
0
191 if (QSpacerItem *si = (*spacerItemFactoryMethod)(layout, w, h, hPolicy, vPolicy))
QSpacerItem *s...licy, vPolicy)Description
TRUEnever evaluated
FALSEnever evaluated
0
192 return si;
never executed: return si;
0
193 return new QSpacerItem(w, h, hPolicy, vPolicy);
never executed: return new QSpacerItem(w, h, hPolicy, vPolicy);
0
194}-
195-
196-
197-
198/*!-
199 \fn void QLayout::addItem(QLayoutItem *item)-
200-
201 Implemented in subclasses to add an \a item. How it is added is-
202 specific to each subclass.-
203-
204 This function is not usually called in application code. To add a widget-
205 to a layout, use the addWidget() function; to add a child layout, use the-
206 addLayout() function provided by the relevant QLayout subclass.-
207-
208 \b{Note:} The ownership of \a item is transferred to the layout, and it's-
209 the layout's responsibility to delete it.-
210-
211 \sa addWidget(), QBoxLayout::addLayout(), QGridLayout::addLayout()-
212*/-
213-
214/*!-
215 Adds widget \a w to this layout in a manner specific to the-
216 layout. This function uses addItem().-
217*/-
218void QLayout::addWidget(QWidget *w)-
219{-
220 addChildWidget(w);-
221 addItem(QLayoutPrivate::createWidgetItem(this, w));-
222}
never executed: end of block
0
223-
224-
225-
226/*!-
227 Sets the alignment for widget \a w to \a alignment and returns-
228 true if \a w is found in this layout (not including child-
229 layouts); otherwise returns \c false.-
230*/-
231bool QLayout::setAlignment(QWidget *w, Qt::Alignment alignment)-
232{-
233 int i = 0;-
234 QLayoutItem *item = itemAt(i);-
235 while (item) {
itemDescription
TRUEnever evaluated
FALSEnever evaluated
0
236 if (item->widget() == w) {
item->widget() == wDescription
TRUEnever evaluated
FALSEnever evaluated
0
237 item->setAlignment(alignment);-
238 invalidate();-
239 return true;
never executed: return true;
0
240 }-
241 ++i;-
242 item = itemAt(i);-
243 }
never executed: end of block
0
244 return false;
never executed: return false;
0
245}-
246-
247/*!-
248 \overload-
249-
250 Sets the alignment for the layout \a l to \a alignment and-
251 returns \c true if \a l is found in this layout (not including child-
252 layouts); otherwise returns \c false.-
253*/-
254bool QLayout::setAlignment(QLayout *l, Qt::Alignment alignment)-
255{-
256 int i = 0;-
257 QLayoutItem *item = itemAt(i);-
258 while (item) {
itemDescription
TRUEnever evaluated
FALSEnever evaluated
0
259 if (item->layout() == l) {
item->layout() == lDescription
TRUEnever evaluated
FALSEnever evaluated
0
260 item->setAlignment(alignment);-
261 invalidate();-
262 return true;
never executed: return true;
0
263 }-
264 ++i;-
265 item = itemAt(i);-
266 }
never executed: end of block
0
267 return false;
never executed: return false;
0
268}-
269-
270/*!-
271 \property QLayout::margin-
272 \brief the width of the outside border of the layout-
273 \obsolete-
274-
275 Use setContentsMargins() and getContentsMargins() instead.-
276-
277 \sa contentsRect(), spacing-
278*/-
279-
280/*!-
281 \obsolete-
282*/-
283int QLayout::margin() const-
284{-
285 int left, top, right, bottom;-
286 getContentsMargins(&left, &top, &right, &bottom);-
287 if (left == top && top == right && right == bottom) {
left == topDescription
TRUEnever evaluated
FALSEnever evaluated
top == rightDescription
TRUEnever evaluated
FALSEnever evaluated
right == bottomDescription
TRUEnever evaluated
FALSEnever evaluated
0
288 return left;
never executed: return left;
0
289 } else {-
290 return -1;
never executed: return -1;
0
291 }-
292}-
293-
294/*!-
295 \property QLayout::spacing-
296 \brief the spacing between widgets inside the layout-
297-
298 If no value is explicitly set, the layout's spacing is inherited-
299 from the parent layout, or from the style settings for the parent-
300 widget.-
301-
302 For QGridLayout and QFormLayout, it is possible to set different horizontal and-
303 vertical spacings using \l{QGridLayout::}{setHorizontalSpacing()}-
304 and \l{QGridLayout::}{setVerticalSpacing()}. In that case,-
305 spacing() returns -1.-
306-
307 \sa contentsRect(), getContentsMargins(), QStyle::layoutSpacing(),-
308 QStyle::pixelMetric()-
309*/-
310-
311int QLayout::spacing() const-
312{-
313 if (const QBoxLayout* boxlayout = qobject_cast<const QBoxLayout*>(this)) {
const QBoxLayo...Layout*>(this)Description
TRUEnever evaluated
FALSEnever evaluated
0
314 return boxlayout->spacing();
never executed: return boxlayout->spacing();
0
315 } else if (const QGridLayout* gridlayout = qobject_cast<const QGridLayout*>(this)) {
const QGridLay...Layout*>(this)Description
TRUEnever evaluated
FALSEnever evaluated
0
316 return gridlayout->spacing();
never executed: return gridlayout->spacing();
0
317 } else if (const QFormLayout* formlayout = qobject_cast<const QFormLayout*>(this)) {
const QFormLay...Layout*>(this)Description
TRUEnever evaluated
FALSEnever evaluated
0
318 return formlayout->spacing();
never executed: return formlayout->spacing();
0
319 } else {-
320 Q_D(const QLayout);-
321 if (d->insideSpacing >=0) {
d->insideSpacing >=0Description
TRUEnever evaluated
FALSEnever evaluated
0
322 return d->insideSpacing;
never executed: return d->insideSpacing;
0
323 } else {-
324 // arbitrarily prefer horizontal spacing to vertical spacing-
325 return qSmartSpacing(this, QStyle::PM_LayoutHorizontalSpacing);
never executed: return qSmartSpacing(this, QStyle::PM_LayoutHorizontalSpacing);
0
326 }-
327 }-
328}-
329-
330/*!-
331 \obsolete-
332*/-
333void QLayout::setMargin(int margin)-
334{-
335 setContentsMargins(margin, margin, margin, margin);-
336}
never executed: end of block
0
337-
338void QLayout::setSpacing(int spacing)-
339{-
340 if (QBoxLayout* boxlayout = qobject_cast<QBoxLayout*>(this)) {
QBoxLayout* bo...Layout*>(this)Description
TRUEnever evaluated
FALSEnever evaluated
0
341 boxlayout->setSpacing(spacing);-
342 } else if (QGridLayout* gridlayout = qobject_cast<QGridLayout*>(this)) {
never executed: end of block
QGridLayout* g...Layout*>(this)Description
TRUEnever evaluated
FALSEnever evaluated
0
343 gridlayout->setSpacing(spacing);-
344 } else if (QFormLayout* formlayout = qobject_cast<QFormLayout*>(this)) {
never executed: end of block
QFormLayout* f...Layout*>(this)Description
TRUEnever evaluated
FALSEnever evaluated
0
345 formlayout->setSpacing(spacing);-
346 } else {
never executed: end of block
0
347 Q_D(QLayout);-
348 d->insideSpacing = spacing;-
349 invalidate();-
350 }
never executed: end of block
0
351}-
352-
353/*!-
354 \since 4.3-
355-
356 Sets the \a left, \a top, \a right, and \a bottom margins to use-
357 around the layout.-
358-
359 By default, QLayout uses the values provided by the style. On-
360 most platforms, the margin is 11 pixels in all directions.-
361-
362 \sa getContentsMargins(), QStyle::pixelMetric(),-
363 {QStyle::}{PM_LayoutLeftMargin},-
364 {QStyle::}{PM_LayoutTopMargin},-
365 {QStyle::}{PM_LayoutRightMargin},-
366 {QStyle::}{PM_LayoutBottomMargin}-
367*/-
368void QLayout::setContentsMargins(int left, int top, int right, int bottom)-
369{-
370 Q_D(QLayout);-
371-
372 if (d->userLeftMargin == left && d->userTopMargin == top &&
d->userLeftMargin == leftDescription
TRUEnever evaluated
FALSEnever evaluated
d->userTopMargin == topDescription
TRUEnever evaluated
FALSEnever evaluated
0
373 d->userRightMargin == right && d->userBottomMargin == bottom)
d->userRightMargin == rightDescription
TRUEnever evaluated
FALSEnever evaluated
d->userBottomMargin == bottomDescription
TRUEnever evaluated
FALSEnever evaluated
0
374 return;
never executed: return;
0
375-
376 d->userLeftMargin = left;-
377 d->userTopMargin = top;-
378 d->userRightMargin = right;-
379 d->userBottomMargin = bottom;-
380 invalidate();-
381}
never executed: end of block
0
382-
383/*!-
384 \since 4.6-
385-
386 Sets the \a margins to use around the layout.-
387-
388 By default, QLayout uses the values provided by the style. On-
389 most platforms, the margin is 11 pixels in all directions.-
390-
391 \sa contentsMargins()-
392*/-
393void QLayout::setContentsMargins(const QMargins &margins)-
394{-
395 setContentsMargins(margins.left(), margins.top(), margins.right(), margins.bottom());-
396}
never executed: end of block
0
397-
398/*!-
399 \since 4.3-
400-
401 Extracts the left, top, right, and bottom margins used around the-
402 layout, and assigns them to *\a left, *\a top, *\a right, and *\a-
403 bottom (unless they are null pointers).-
404-
405 By default, QLayout uses the values provided by the style. On-
406 most platforms, the margin is 11 pixels in all directions.-
407-
408 \sa setContentsMargins(), QStyle::pixelMetric(),-
409 {QStyle::}{PM_LayoutLeftMargin},-
410 {QStyle::}{PM_LayoutTopMargin},-
411 {QStyle::}{PM_LayoutRightMargin},-
412 {QStyle::}{PM_LayoutBottomMargin}-
413*/-
414void QLayout::getContentsMargins(int *left, int *top, int *right, int *bottom) const-
415{-
416 Q_D(const QLayout);-
417 d->getMargin(left, d->userLeftMargin, QStyle::PM_LayoutLeftMargin);-
418 d->getMargin(top, d->userTopMargin, QStyle::PM_LayoutTopMargin);-
419 d->getMargin(right, d->userRightMargin, QStyle::PM_LayoutRightMargin);-
420 d->getMargin(bottom, d->userBottomMargin, QStyle::PM_LayoutBottomMargin);-
421}
never executed: end of block
0
422-
423/*!-
424 \since 4.6-
425-
426 Returns the margins used around the layout.-
427-
428 By default, QLayout uses the values provided by the style. On-
429 most platforms, the margin is 11 pixels in all directions.-
430-
431 \sa setContentsMargins()-
432*/-
433QMargins QLayout::contentsMargins() const-
434{-
435 int left, top, right, bottom;-
436 getContentsMargins(&left, &top, &right, &bottom);-
437 return QMargins(left, top, right, bottom);
never executed: return QMargins(left, top, right, bottom);
0
438}-
439-
440/*!-
441 \since 4.3-
442-
443 Returns the layout's geometry() rectangle, but taking into account the-
444 contents margins.-
445-
446 \sa setContentsMargins(), getContentsMargins()-
447*/-
448QRect QLayout::contentsRect() const-
449{-
450 Q_D(const QLayout);-
451 int left, top, right, bottom;-
452 getContentsMargins(&left, &top, &right, &bottom);-
453 return d->rect.adjusted(+left, +top, -right, -bottom);
never executed: return d->rect.adjusted(+left, +top, -right, -bottom);
0
454}-
455-
456-
457/*!-
458 Returns the parent widget of this layout, or 0 if this layout is-
459 not installed on any widget.-
460-
461 If the layout is a sub-layout, this function returns the parent-
462 widget of the parent layout.-
463-
464 \sa parent()-
465*/-
466QWidget *QLayout::parentWidget() const-
467{-
468 Q_D(const QLayout);-
469 if (!d->topLevel) {
!d->topLevelDescription
TRUEnever evaluated
FALSEnever evaluated
0
470 if (parent()) {
parent()Description
TRUEnever evaluated
FALSEnever evaluated
0
471 QLayout *parentLayout = qobject_cast<QLayout*>(parent());-
472 if (!parentLayout) {
!parentLayoutDescription
TRUEnever evaluated
FALSEnever evaluated
0
473 qWarning("QLayout::parentWidget: A layout can only have another layout as a parent.");-
474 return 0;
never executed: return 0;
0
475 }-
476 return parentLayout->parentWidget();
never executed: return parentLayout->parentWidget();
0
477 } else {-
478 return 0;
never executed: return 0;
0
479 }-
480 } else {-
481 Q_ASSERT(parent() && parent()->isWidgetType());-
482 return static_cast<QWidget *>(parent());
never executed: return static_cast<QWidget *>(parent());
0
483 }-
484}-
485-
486/*!-
487 \reimp-
488*/-
489bool QLayout::isEmpty() const-
490{-
491 int i = 0;-
492 QLayoutItem *item = itemAt(i);-
493 while (item) {
itemDescription
TRUEnever evaluated
FALSEnever evaluated
0
494 if (!item->isEmpty())
!item->isEmpty()Description
TRUEnever evaluated
FALSEnever evaluated
0
495 return false;
never executed: return false;
0
496 ++i;-
497 item = itemAt(i);-
498 }
never executed: end of block
0
499 return true;
never executed: return true;
0
500}-
501-
502/*!-
503 \reimp-
504*/-
505QSizePolicy::ControlTypes QLayout::controlTypes() const-
506{-
507 if (count() == 0)
count() == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
508 return QSizePolicy::DefaultType;
never executed: return QSizePolicy::DefaultType;
0
509 QSizePolicy::ControlTypes types;-
510 for (int i = count() - 1; i >= 0; --i)
i >= 0Description
TRUEnever evaluated
FALSEnever evaluated
0
511 types |= itemAt(i)->controlTypes();
never executed: types |= itemAt(i)->controlTypes();
0
512 return types;
never executed: return types;
0
513}-
514-
515/*!-
516 \reimp-
517*/-
518void QLayout::setGeometry(const QRect &r)-
519{-
520 Q_D(QLayout);-
521 d->rect = r;-
522}
never executed: end of block
0
523-
524/*!-
525 \reimp-
526*/-
527QRect QLayout::geometry() const-
528{-
529 Q_D(const QLayout);-
530 return d->rect;
never executed: return d->rect;
0
531}-
532-
533/*!-
534 \reimp-
535*/-
536void QLayout::invalidate()-
537{-
538 Q_D(QLayout);-
539 d->rect = QRect();-
540 update();-
541}
never executed: end of block
0
542-
543static bool removeWidgetRecursively(QLayoutItem *li, QObject *w)-
544{-
545 QLayout *lay = li->layout();-
546 if (!lay)
!layDescription
TRUEnever evaluated
FALSEnever evaluated
0
547 return false;
never executed: return false;
0
548 int i = 0;-
549 QLayoutItem *child;-
550 while ((child = lay->itemAt(i))) {
(child = lay->itemAt(i))Description
TRUEnever evaluated
FALSEnever evaluated
0
551 if (child->widget() == w) {
child->widget() == wDescription
TRUEnever evaluated
FALSEnever evaluated
0
552 delete lay->takeAt(i);-
553 lay->invalidate();-
554 return true;
never executed: return true;
0
555 } else if (removeWidgetRecursively(child, w)) {
removeWidgetRe...vely(child, w)Description
TRUEnever evaluated
FALSEnever evaluated
0
556 return true;
never executed: return true;
0
557 } else {-
558 ++i;-
559 }
never executed: end of block
0
560 }-
561 return false;
never executed: return false;
0
562}-
563-
564-
565void QLayoutPrivate::doResize(const QSize &r)-
566{-
567 Q_Q(QLayout);-
568 int mbh = menuBarHeightForWidth(menubar, r.width());-
569 QWidget *mw = q->parentWidget();-
570 QRect rect = mw->testAttribute(Qt::WA_LayoutOnEntireRect) ? mw->rect() : mw->contentsRect();
mw->testAttrib...tOnEntireRect)Description
TRUEnever evaluated
FALSEnever evaluated
0
571 const int mbTop = rect.top();-
572 rect.setTop(rect.top() + mbh);-
573 q->setGeometry(rect);-
574#ifndef QT_NO_MENUBAR-
575 if (menubar)
menubarDescription
TRUEnever evaluated
FALSEnever evaluated
0
576 menubar->setGeometry(rect.left(), mbTop, r.width(), mbh);
never executed: menubar->setGeometry(rect.left(), mbTop, r.width(), mbh);
0
577#endif-
578}
never executed: end of block
0
579-
580-
581/*!-
582 \internal-
583 Performs child widget layout when the parent widget is-
584 resized. Also handles removal of widgets. \a e is the-
585 event-
586*/-
587void QLayout::widgetEvent(QEvent *e)-
588{-
589 Q_D(QLayout);-
590 if (!d->enabled)
!d->enabledDescription
TRUEnever evaluated
FALSEnever evaluated
0
591 return;
never executed: return;
0
592-
593 switch (e->type()) {-
594 case QEvent::Resize:
never executed: case QEvent::Resize:
0
595 if (d->activated) {
d->activatedDescription
TRUEnever evaluated
FALSEnever evaluated
0
596 QResizeEvent *r = (QResizeEvent *)e;-
597 d->doResize(r->size());-
598 } else {
never executed: end of block
0
599 activate();-
600 }
never executed: end of block
0
601 break;
never executed: break;
0
602 case QEvent::ChildRemoved:
never executed: case QEvent::ChildRemoved:
0
603 {-
604 QChildEvent *c = (QChildEvent *)e;-
605 if (c->child()->isWidgetType()) {
c->child()->isWidgetType()Description
TRUEnever evaluated
FALSEnever evaluated
0
606#ifndef QT_NO_MENUBAR-
607 if (c->child() == d->menubar)
c->child() == d->menubarDescription
TRUEnever evaluated
FALSEnever evaluated
0
608 d->menubar = 0;
never executed: d->menubar = 0;
0
609#endif-
610 removeWidgetRecursively(this, c->child());-
611 }
never executed: end of block
0
612 }-
613 break;
never executed: break;
0
614 case QEvent::LayoutRequest:
never executed: case QEvent::LayoutRequest:
0
615 if (static_cast<QWidget *>(parent())->isVisible())
static_cast<QW...)->isVisible()Description
TRUEnever evaluated
FALSEnever evaluated
0
616 activate();
never executed: activate();
0
617 break;
never executed: break;
0
618 default:
never executed: default:
0
619 break;
never executed: break;
0
620 }-
621}-
622-
623/*!-
624 \reimp-
625*/-
626void QLayout::childEvent(QChildEvent *e)-
627{-
628 Q_D(QLayout);-
629 if (!d->enabled)
!d->enabledDescription
TRUEnever evaluated
FALSEnever evaluated
0
630 return;
never executed: return;
0
631-
632 if (e->type() == QEvent::ChildRemoved) {
e->type() == Q...::ChildRemovedDescription
TRUEnever evaluated
FALSEnever evaluated
0
633 QChildEvent *c = (QChildEvent*)e;-
634 int i = 0;-
635-
636 QLayoutItem *item;-
637 while ((item = itemAt(i))) {
(item = itemAt(i))Description
TRUEnever evaluated
FALSEnever evaluated
0
638 if (item == static_cast<QLayout*>(c->child())) {
item == static...*>(c->child())Description
TRUEnever evaluated
FALSEnever evaluated
0
639 takeAt(i);-
640 invalidate();-
641 break;
never executed: break;
0
642 } else {-
643 ++i;-
644 }
never executed: end of block
0
645 }-
646 }
never executed: end of block
0
647}
never executed: end of block
0
648-
649/*!-
650 \internal-
651 Also takes contentsMargins and menu bar into account.-
652*/-
653int QLayout::totalHeightForWidth(int w) const-
654{-
655 Q_D(const QLayout);-
656 int side=0, top=0;-
657 if (d->topLevel) {
d->topLevelDescription
TRUEnever evaluated
FALSEnever evaluated
0
658 QWidget *parent = parentWidget();-
659 parent->ensurePolished();-
660 QWidgetPrivate *wd = parent->d_func();-
661 side += wd->leftmargin + wd->rightmargin;-
662 top += wd->topmargin + wd->bottommargin;-
663 }
never executed: end of block
0
664 int h = heightForWidth(w - side) + top;-
665#ifndef QT_NO_MENUBAR-
666 h += menuBarHeightForWidth(d->menubar, w);-
667#endif-
668 return h;
never executed: return h;
0
669}-
670-
671/*!-
672 \internal-
673 Also takes contentsMargins and menu bar into account.-
674*/-
675QSize QLayout::totalMinimumSize() const-
676{-
677 Q_D(const QLayout);-
678 int side=0, top=0;-
679 if (d->topLevel) {
d->topLevelDescription
TRUEnever evaluated
FALSEnever evaluated
0
680 QWidget *pw = parentWidget();-
681 pw->ensurePolished();-
682 QWidgetPrivate *wd = pw->d_func();-
683 side += wd->leftmargin + wd->rightmargin;-
684 top += wd->topmargin + wd->bottommargin;-
685 }
never executed: end of block
0
686-
687 QSize s = minimumSize();-
688#ifndef QT_NO_MENUBAR-
689 top += menuBarHeightForWidth(d->menubar, s.width() + side);-
690#endif-
691 return s + QSize(side, top);
never executed: return s + QSize(side, top);
0
692}-
693-
694/*!-
695 \internal-
696 Also takes contentsMargins and menu bar into account.-
697*/-
698QSize QLayout::totalSizeHint() const-
699{-
700 Q_D(const QLayout);-
701 int side=0, top=0;-
702 if (d->topLevel) {
d->topLevelDescription
TRUEnever evaluated
FALSEnever evaluated
0
703 QWidget *pw = parentWidget();-
704 pw->ensurePolished();-
705 QWidgetPrivate *wd = pw->d_func();-
706 side += wd->leftmargin + wd->rightmargin;-
707 top += wd->topmargin + wd->bottommargin;-
708 }
never executed: end of block
0
709-
710 QSize s = sizeHint();-
711 if (hasHeightForWidth())
hasHeightForWidth()Description
TRUEnever evaluated
FALSEnever evaluated
0
712 s.setHeight(heightForWidth(s.width() + side));
never executed: s.setHeight(heightForWidth(s.width() + side));
0
713#ifndef QT_NO_MENUBAR-
714 top += menuBarHeightForWidth(d->menubar, s.width());-
715#endif-
716 return s + QSize(side, top);
never executed: return s + QSize(side, top);
0
717}-
718-
719/*!-
720 \internal-
721 Also takes contentsMargins and menu bar into account.-
722*/-
723QSize QLayout::totalMaximumSize() const-
724{-
725 Q_D(const QLayout);-
726 int side=0, top=0;-
727 if (d->topLevel) {
d->topLevelDescription
TRUEnever evaluated
FALSEnever evaluated
0
728 QWidget *pw = parentWidget();-
729 pw->ensurePolished();-
730 QWidgetPrivate *wd = pw->d_func();-
731 side += wd->leftmargin + wd->rightmargin;-
732 top += wd->topmargin + wd->bottommargin;-
733 }
never executed: end of block
0
734-
735 QSize s = maximumSize();-
736#ifndef QT_NO_MENUBAR-
737 top += menuBarHeightForWidth(d->menubar, s.width());-
738#endif-
739-
740 if (d->topLevel)
d->topLevelDescription
TRUEnever evaluated
FALSEnever evaluated
0
741 s = QSize(qMin(s.width() + side, QLAYOUTSIZE_MAX),
never executed: s = QSize(qMin(s.width() + side, QLAYOUTSIZE_MAX), qMin(s.height() + top, QLAYOUTSIZE_MAX));
0
742 qMin(s.height() + top, QLAYOUTSIZE_MAX));
never executed: s = QSize(qMin(s.width() + side, QLAYOUTSIZE_MAX), qMin(s.height() + top, QLAYOUTSIZE_MAX));
0
743 return s;
never executed: return s;
0
744}-
745-
746/*!-
747 \internal-
748 Destroys the layout, deleting all child layouts.-
749 Geometry management stops when a top-level layout is deleted.-
750-
751 The layout classes will probably be fatally confused if you delete-
752 a sublayout.-
753*/-
754QLayout::~QLayout()-
755{-
756 Q_D(QLayout);-
757 /*-
758 This function may be called during the QObject destructor,-
759 when the parent no longer is a QWidget.-
760 */-
761 if (d->topLevel && parent() && parent()->isWidgetType() &&
d->topLevelDescription
TRUEnever evaluated
FALSEnever evaluated
parent()Description
TRUEnever evaluated
FALSEnever evaluated
parent()->isWidgetType()Description
TRUEnever evaluated
FALSEnever evaluated
0
762 ((QWidget*)parent())->layout() == this)
((QWidget*)par...yout() == thisDescription
TRUEnever evaluated
FALSEnever evaluated
0
763 ((QWidget*)parent())->d_func()->layout = 0;
never executed: ((QWidget*)parent())->d_func()->layout = 0;
0
764}
never executed: end of block
0
765-
766-
767/*!-
768 This function is called from \c addLayout() or \c insertLayout() functions in-
769 subclasses to add layout \a l as a sub-layout.-
770-
771 The only scenario in which you need to call it directly is if you-
772 implement a custom layout that supports nested layouts.-
773-
774 \sa QBoxLayout::addLayout(), QBoxLayout::insertLayout(), QGridLayout::addLayout()-
775*/-
776void QLayout::addChildLayout(QLayout *l)-
777{-
778 if (l->parent()) {
l->parent()Description
TRUEnever evaluated
FALSEnever evaluated
0
779 qWarning("QLayout::addChildLayout: layout \"%s\" already has a parent",-
780 l->objectName().toLocal8Bit().data());-
781 return;
never executed: return;
0
782 }-
783 l->setParent(this);-
784-
785 if (QWidget *mw = parentWidget()) {
QWidget *mw = parentWidget()Description
TRUEnever evaluated
FALSEnever evaluated
0
786 l->d_func()->reparentChildWidgets(mw);-
787 }
never executed: end of block
0
788-
789}
never executed: end of block
0
790-
791/*!-
792 \internal-
793 */-
794bool QLayout::adoptLayout(QLayout *layout)-
795{-
796 const bool ok = !layout->parent();-
797 addChildLayout(layout);-
798 return ok;
never executed: return ok;
0
799}-
800-
801#ifdef QT_DEBUG-
802static bool layoutDebug()-
803{-
804 static int checked_env = -1;-
805 if(checked_env == -1)
checked_env == -1Description
TRUEnever evaluated
FALSEnever evaluated
0
806 checked_env = !!qgetenv("QT_LAYOUT_DEBUG").toInt();
never executed: checked_env = !!qgetenv("QT_LAYOUT_DEBUG").toInt();
0
807-
808 return checked_env;
never executed: return checked_env;
0
809}-
810#endif-
811-
812void QLayoutPrivate::reparentChildWidgets(QWidget *mw)-
813{-
814 Q_Q(QLayout);-
815 int n = q->count();-
816-
817#ifndef QT_NO_MENUBAR-
818 if (menubar && menubar->parentWidget() != mw) {
menubarDescription
TRUEnever evaluated
FALSEnever evaluated
menubar->parentWidget() != mwDescription
TRUEnever evaluated
FALSEnever evaluated
0
819 menubar->setParent(mw);-
820 }
never executed: end of block
0
821#endif-
822 bool mwVisible = mw && mw->isVisible();
mwDescription
TRUEnever evaluated
FALSEnever evaluated
mw->isVisible()Description
TRUEnever evaluated
FALSEnever evaluated
0
823 for (int i = 0; i < n; ++i) {
i < nDescription
TRUEnever evaluated
FALSEnever evaluated
0
824 QLayoutItem *item = q->itemAt(i);-
825 if (QWidget *w = item->widget()) {
QWidget *w = item->widget()Description
TRUEnever evaluated
FALSEnever evaluated
0
826 QWidget *pw = w->parentWidget();-
827#ifdef QT_DEBUG-
828 if (pw && pw != mw && layoutDebug()) {
pwDescription
TRUEnever evaluated
FALSEnever evaluated
pw != mwDescription
TRUEnever evaluated
FALSEnever evaluated
layoutDebug()Description
TRUEnever evaluated
FALSEnever evaluated
0
829 qWarning("QLayout::addChildLayout: widget %s \"%s\" in wrong parent; moved to correct parent",-
830 w->metaObject()->className(), w->objectName().toLocal8Bit().data());-
831 }
never executed: end of block
0
832#endif-
833 bool needShow = mwVisible && !(w->isHidden() && w->testAttribute(Qt::WA_WState_ExplicitShowHide));
mwVisibleDescription
TRUEnever evaluated
FALSEnever evaluated
w->isHidden()Description
TRUEnever evaluated
FALSEnever evaluated
w->testAttribu...licitShowHide)Description
TRUEnever evaluated
FALSEnever evaluated
0
834 if (pw != mw)
pw != mwDescription
TRUEnever evaluated
FALSEnever evaluated
0
835 w->setParent(mw);
never executed: w->setParent(mw);
0
836 if (needShow)
needShowDescription
TRUEnever evaluated
FALSEnever evaluated
0
837 QMetaObject::invokeMethod(w, "_q_showIfNotHidden", Qt::QueuedConnection); //show later
never executed: QMetaObject::invokeMethod(w, "_q_showIfNotHidden", Qt::QueuedConnection);
0
838 } else if (QLayout *l = item->layout()) {
never executed: end of block
QLayout *l = item->layout()Description
TRUEnever evaluated
FALSEnever evaluated
0
839 l->d_func()->reparentChildWidgets(mw);-
840 }
never executed: end of block
0
841 }
never executed: end of block
0
842}
never executed: end of block
0
843-
844/*!-
845 Returns \c true if the \a widget can be added to the \a layout;-
846 otherwise returns \c false.-
847*/-
848bool QLayoutPrivate::checkWidget(QWidget *widget) const-
849{-
850 Q_Q(const QLayout);-
851 if (!widget) {
!widgetDescription
TRUEnever evaluated
FALSEnever evaluated
0
852 qWarning("QLayout: Cannot add a null widget to %s/%s", q->metaObject()->className(),-
853 qPrintable(q->objectName()));-
854 return false;
never executed: return false;
0
855 }-
856 if (widget == q->parentWidget()) {
widget == q->parentWidget()Description
TRUEnever evaluated
FALSEnever evaluated
0
857 qWarning("QLayout: Cannot add parent widget %s/%s to its child layout %s/%s",-
858 widget->metaObject()->className(), qPrintable(widget->objectName()),-
859 q->metaObject()->className(), qPrintable(q->objectName()));-
860 return false;
never executed: return false;
0
861 }-
862 return true;
never executed: return true;
0
863}-
864-
865/*!-
866 Returns \c true if the \a otherLayout can be added to the \a layout;-
867 otherwise returns \c false.-
868*/-
869bool QLayoutPrivate::checkLayout(QLayout *otherLayout) const-
870{-
871 Q_Q(const QLayout);-
872 if (!otherLayout) {
!otherLayoutDescription
TRUEnever evaluated
FALSEnever evaluated
0
873 qWarning("QLayout: Cannot add a null layout to %s/%s", q->metaObject()->className(),-
874 qPrintable(q->objectName()));-
875 return false;
never executed: return false;
0
876 }-
877 if (otherLayout == q) {
otherLayout == qDescription
TRUEnever evaluated
FALSEnever evaluated
0
878 qWarning("QLayout: Cannot add layout %s/%s to itself", q->metaObject()->className(),-
879 qPrintable(q->objectName()));-
880 return false;
never executed: return false;
0
881 }-
882 return true;
never executed: return true;
0
883}-
884-
885/*!-
886 This function is called from \c addWidget() functions in-
887 subclasses to add \a w as a managed widget of a layout.-
888-
889 If \a w is already managed by a layout, this function will give a warning-
890 and remove \a w from that layout. This function must therefore be-
891 called before adding \a w to the layout's data structure.-
892*/-
893void QLayout::addChildWidget(QWidget *w)-
894{-
895 QWidget *mw = parentWidget();-
896 QWidget *pw = w->parentWidget();-
897-
898 //Qt::WA_LaidOut is never reset. It only means that the widget at some point has-
899 //been in a layout.-
900 if (pw && w->testAttribute(Qt::WA_LaidOut)) {
pwDescription
TRUEnever evaluated
FALSEnever evaluated
w->testAttribu...t::WA_LaidOut)Description
TRUEnever evaluated
FALSEnever evaluated
0
901 QLayout *l = pw->layout();-
902 if (l && removeWidgetRecursively(l, w)) {
lDescription
TRUEnever evaluated
FALSEnever evaluated
removeWidgetRecursively(l, w)Description
TRUEnever evaluated
FALSEnever evaluated
0
903#ifdef QT_DEBUG-
904 if (layoutDebug())
layoutDebug()Description
TRUEnever evaluated
FALSEnever evaluated
0
905 qWarning("QLayout::addChildWidget: %s \"%s\" is already in a layout; moved to new layout",
never executed: QMessageLogger(__FILE__, 905, __PRETTY_FUNCTION__).warning("QLayout::addChildWidget: %s \"%s\" is already in a layout; moved to new layout", w->metaObject()->className(), w->objectName().toLocal8Bit().data());
0
906 w->metaObject()->className(), w->objectName().toLocal8Bit().data());
never executed: QMessageLogger(__FILE__, 905, __PRETTY_FUNCTION__).warning("QLayout::addChildWidget: %s \"%s\" is already in a layout; moved to new layout", w->metaObject()->className(), w->objectName().toLocal8Bit().data());
0
907#endif-
908 }
never executed: end of block
0
909 }
never executed: end of block
0
910 if (pw && mw && pw != mw) {
pwDescription
TRUEnever evaluated
FALSEnever evaluated
mwDescription
TRUEnever evaluated
FALSEnever evaluated
pw != mwDescription
TRUEnever evaluated
FALSEnever evaluated
0
911#ifdef QT_DEBUG-
912 if (layoutDebug())
layoutDebug()Description
TRUEnever evaluated
FALSEnever evaluated
0
913 qWarning("QLayout::addChildWidget: %s \"%s\" in wrong parent; moved to correct parent",
never executed: QMessageLogger(__FILE__, 913, __PRETTY_FUNCTION__).warning("QLayout::addChildWidget: %s \"%s\" in wrong parent; moved to correct parent", w->metaObject()->className(), w->objectName().toLocal8Bit().data());
0
914 w->metaObject()->className(), w->objectName().toLocal8Bit().data());
never executed: QMessageLogger(__FILE__, 913, __PRETTY_FUNCTION__).warning("QLayout::addChildWidget: %s \"%s\" in wrong parent; moved to correct parent", w->metaObject()->className(), w->objectName().toLocal8Bit().data());
0
915#endif-
916 pw = 0;-
917 }
never executed: end of block
0
918 bool needShow = mw && mw->isVisible() && !(w->isHidden() && w->testAttribute(Qt::WA_WState_ExplicitShowHide));
mwDescription
TRUEnever evaluated
FALSEnever evaluated
mw->isVisible()Description
TRUEnever evaluated
FALSEnever evaluated
w->isHidden()Description
TRUEnever evaluated
FALSEnever evaluated
w->testAttribu...licitShowHide)Description
TRUEnever evaluated
FALSEnever evaluated
0
919 if (!pw && mw)
!pwDescription
TRUEnever evaluated
FALSEnever evaluated
mwDescription
TRUEnever evaluated
FALSEnever evaluated
0
920 w->setParent(mw);
never executed: w->setParent(mw);
0
921 w->setAttribute(Qt::WA_LaidOut);-
922 if (needShow)
needShowDescription
TRUEnever evaluated
FALSEnever evaluated
0
923 QMetaObject::invokeMethod(w, "_q_showIfNotHidden", Qt::QueuedConnection); //show later
never executed: QMetaObject::invokeMethod(w, "_q_showIfNotHidden", Qt::QueuedConnection);
0
924}
never executed: end of block
0
925-
926-
927-
928-
929-
930-
931-
932-
933/*!-
934 Tells the geometry manager to place the menu bar \a widget at the-
935 top of parentWidget(), outside QWidget::contentsMargins(). All-
936 child widgets are placed below the bottom edge of the menu bar.-
937*/-
938void QLayout::setMenuBar(QWidget *widget)-
939{-
940 Q_D(QLayout);-
941-
942#ifdef Q_OS_WINCE_WM-
943 if (widget && widget->size().height() > 0)-
944#else-
945 if (widget)
widgetDescription
TRUEnever evaluated
FALSEnever evaluated
0
946#endif-
947 addChildWidget(widget);
never executed: addChildWidget(widget);
0
948 d->menubar = widget;-
949}
never executed: end of block
0
950-
951/*!-
952 Returns the menu bar set for this layout, or 0 if no menu bar is-
953 set.-
954*/-
955-
956QWidget *QLayout::menuBar() const-
957{-
958 Q_D(const QLayout);-
959 return d->menubar;
never executed: return d->menubar;
0
960}-
961-
962-
963/*!-
964 Returns the minimum size of this layout. This is the smallest-
965 size that the layout can have while still respecting the-
966 specifications.-
967-
968 The returned value doesn't include the space required by-
969 QWidget::setContentsMargins() or menuBar().-
970-
971 The default implementation allows unlimited resizing.-
972*/-
973QSize QLayout::minimumSize() const-
974{-
975 return QSize(0, 0);
never executed: return QSize(0, 0);
0
976}-
977-
978/*!-
979 Returns the maximum size of this layout. This is the largest size-
980 that the layout can have while still respecting the-
981 specifications.-
982-
983 The returned value doesn't include the space required by-
984 QWidget::setContentsMargins() or menuBar().-
985-
986 The default implementation allows unlimited resizing.-
987*/-
988QSize QLayout::maximumSize() const-
989{-
990 return QSize(QLAYOUTSIZE_MAX, QLAYOUTSIZE_MAX);
never executed: return QSize(QLAYOUTSIZE_MAX, QLAYOUTSIZE_MAX);
0
991}-
992-
993/*!-
994 Returns whether this layout can make use of more space than-
995 sizeHint(). A value of Qt::Vertical or Qt::Horizontal means that-
996 it wants to grow in only one dimension, whereas Qt::Vertical |-
997 Qt::Horizontal means that it wants to grow in both dimensions.-
998-
999 The default implementation returns Qt::Horizontal | Qt::Vertical.-
1000 Subclasses reimplement it to return a meaningful value based on-
1001 their child widgets's \l{QSizePolicy}{size policies}.-
1002-
1003 \sa sizeHint()-
1004*/-
1005Qt::Orientations QLayout::expandingDirections() const-
1006{-
1007 return Qt::Horizontal | Qt::Vertical;
never executed: return Qt::Horizontal | Qt::Vertical;
0
1008}-
1009-
1010void QLayout::activateRecursiveHelper(QLayoutItem *item)-
1011{-
1012 item->invalidate();-
1013 QLayout *layout = item->layout();-
1014 if (layout) {
layoutDescription
TRUEnever evaluated
FALSEnever evaluated
0
1015 QLayoutItem *child;-
1016 int i=0;-
1017 while ((child = layout->itemAt(i++)))
(child = layout->itemAt(i++))Description
TRUEnever evaluated
FALSEnever evaluated
0
1018 activateRecursiveHelper(child);
never executed: activateRecursiveHelper(child);
0
1019 layout->d_func()->activated = true;-
1020 }
never executed: end of block
0
1021}
never executed: end of block
0
1022-
1023/*!-
1024 Updates the layout for parentWidget().-
1025-
1026 You should generally not need to call this because it is-
1027 automatically called at the most appropriate times.-
1028-
1029 \sa activate(), invalidate()-
1030*/-
1031-
1032void QLayout::update()-
1033{-
1034 QLayout *layout = this;-
1035 while (layout && layout->d_func()->activated) {
layoutDescription
TRUEnever evaluated
FALSEnever evaluated
layout->d_func()->activatedDescription
TRUEnever evaluated
FALSEnever evaluated
0
1036 layout->d_func()->activated = false;-
1037 if (layout->d_func()->topLevel) {
layout->d_func()->topLevelDescription
TRUEnever evaluated
FALSEnever evaluated
0
1038 Q_ASSERT(layout->parent()->isWidgetType());-
1039 QWidget *mw = static_cast<QWidget*>(layout->parent());-
1040 QApplication::postEvent(mw, new QEvent(QEvent::LayoutRequest));-
1041 break;
never executed: break;
0
1042 }-
1043 layout = static_cast<QLayout*>(layout->parent());-
1044 }
never executed: end of block
0
1045}
never executed: end of block
0
1046-
1047/*!-
1048 Redoes the layout for parentWidget() if necessary.-
1049-
1050 You should generally not need to call this because it is-
1051 automatically called at the most appropriate times. It returns-
1052 true if the layout was redone.-
1053-
1054 \sa update(), QWidget::updateGeometry()-
1055*/-
1056bool QLayout::activate()-
1057{-
1058 Q_D(QLayout);-
1059 if (!d->enabled || !parent())
!d->enabledDescription
TRUEnever evaluated
FALSEnever evaluated
!parent()Description
TRUEnever evaluated
FALSEnever evaluated
0
1060 return false;
never executed: return false;
0
1061 if (!d->topLevel)
!d->topLevelDescription
TRUEnever evaluated
FALSEnever evaluated
0
1062 return static_cast<QLayout*>(parent())->activate();
never executed: return static_cast<QLayout*>(parent())->activate();
0
1063 if (d->activated)
d->activatedDescription
TRUEnever evaluated
FALSEnever evaluated
0
1064 return false;
never executed: return false;
0
1065 QWidget *mw = static_cast<QWidget*>(parent());-
1066 if (mw == 0) {
mw == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
1067 qWarning("QLayout::activate: %s \"%s\" does not have a main widget",-
1068 QObject::metaObject()->className(), QObject::objectName().toLocal8Bit().data());-
1069 return false;
never executed: return false;
0
1070 }-
1071 activateRecursiveHelper(this);-
1072-
1073 QWidgetPrivate *md = mw->d_func();-
1074 uint explMin = md->extra ? md->extra->explicitMinSize : 0;
md->extraDescription
TRUEnever evaluated
FALSEnever evaluated
0
1075 uint explMax = md->extra ? md->extra->explicitMaxSize : 0;
md->extraDescription
TRUEnever evaluated
FALSEnever evaluated
0
1076-
1077 switch (d->constraint) {-
1078 case SetFixedSize:
never executed: case SetFixedSize:
0
1079 // will trigger resize-
1080 mw->setFixedSize(totalSizeHint());-
1081 break;
never executed: break;
0
1082 case SetMinimumSize:
never executed: case SetMinimumSize:
0
1083 mw->setMinimumSize(totalMinimumSize());-
1084 break;
never executed: break;
0
1085 case SetMaximumSize:
never executed: case SetMaximumSize:
0
1086 mw->setMaximumSize(totalMaximumSize());-
1087 break;
never executed: break;
0
1088 case SetMinAndMaxSize:
never executed: case SetMinAndMaxSize:
0
1089 mw->setMinimumSize(totalMinimumSize());-
1090 mw->setMaximumSize(totalMaximumSize());-
1091 break;
never executed: break;
0
1092 case SetDefaultConstraint: {
never executed: case SetDefaultConstraint:
0
1093 bool widthSet = explMin & Qt::Horizontal;-
1094 bool heightSet = explMin & Qt::Vertical;-
1095 if (mw->isWindow()) {
mw->isWindow()Description
TRUEnever evaluated
FALSEnever evaluated
0
1096 QSize ms = totalMinimumSize();-
1097 if (widthSet)
widthSetDescription
TRUEnever evaluated
FALSEnever evaluated
0
1098 ms.setWidth(mw->minimumSize().width());
never executed: ms.setWidth(mw->minimumSize().width());
0
1099 if (heightSet)
heightSetDescription
TRUEnever evaluated
FALSEnever evaluated
0
1100 ms.setHeight(mw->minimumSize().height());
never executed: ms.setHeight(mw->minimumSize().height());
0
1101 mw->setMinimumSize(ms);-
1102 } else if (!widthSet || !heightSet) {
never executed: end of block
!widthSetDescription
TRUEnever evaluated
FALSEnever evaluated
!heightSetDescription
TRUEnever evaluated
FALSEnever evaluated
0
1103 QSize ms = mw->minimumSize();-
1104 if (!widthSet)
!widthSetDescription
TRUEnever evaluated
FALSEnever evaluated
0
1105 ms.setWidth(0);
never executed: ms.setWidth(0);
0
1106 if (!heightSet)
!heightSetDescription
TRUEnever evaluated
FALSEnever evaluated
0
1107 ms.setHeight(0);
never executed: ms.setHeight(0);
0
1108 mw->setMinimumSize(ms);-
1109 }
never executed: end of block
0
1110 break;
never executed: break;
0
1111 }-
1112 case SetNoConstraint:
never executed: case SetNoConstraint:
0
1113 break;
never executed: break;
0
1114 }-
1115-
1116 d->doResize(mw->size());-
1117-
1118 if (md->extra) {
md->extraDescription
TRUEnever evaluated
FALSEnever evaluated
0
1119 md->extra->explicitMinSize = explMin;-
1120 md->extra->explicitMaxSize = explMax;-
1121 }
never executed: end of block
0
1122 // ideally only if sizeHint() or sizePolicy() has changed-
1123 mw->updateGeometry();-
1124 return true;
never executed: return true;
0
1125}-
1126-
1127/*!-
1128 \since 5.2-
1129-
1130 Searches for widget \a from and replaces it with widget \a to if found.-
1131 Returns the layout item that contains the widget \a from on success.-
1132 Otherwise \c 0 is returned. If \a options contains \c Qt::FindChildrenRecursively-
1133 (the default), sub-layouts are searched for doing the replacement.-
1134 Any other flag in \a options is ignored.-
1135-
1136 Notice that the returned item therefore might not belong to this layout,-
1137 but to a sub-layout.-
1138-
1139 The returned layout item is no longer owned by the layout and should be-
1140 either deleted or inserted to another layout. The widget \a from is no-
1141 longer managed by the layout and may need to be deleted or hidden. The-
1142 parent of widget \a from is left unchanged.-
1143-
1144 This function works for the built-in Qt layouts, but might not work for-
1145 custom layouts.-
1146-
1147 \sa indexOf()-
1148*/-
1149-
1150QLayoutItem *QLayout::replaceWidget(QWidget *from, QWidget *to, Qt::FindChildOptions options)-
1151{-
1152 Q_D(QLayout);-
1153 if (!from || !to)
!fromDescription
TRUEnever evaluated
FALSEnever evaluated
!toDescription
TRUEnever evaluated
FALSEnever evaluated
0
1154 return 0;
never executed: return 0;
0
1155-
1156 int index = -1;-
1157 QLayoutItem *item = 0;-
1158 for (int u = 0; u < count(); ++u) {
u < count()Description
TRUEnever evaluated
FALSEnever evaluated
0
1159 item = itemAt(u);-
1160 if (!item)
!itemDescription
TRUEnever evaluated
FALSEnever evaluated
0
1161 continue;
never executed: continue;
0
1162-
1163 if (item->widget() == from) {
item->widget() == fromDescription
TRUEnever evaluated
FALSEnever evaluated
0
1164 index = u;-
1165 break;
never executed: break;
0
1166 }-
1167-
1168 if (item->layout() && (options & Qt::FindChildrenRecursively)) {
item->layout()Description
TRUEnever evaluated
FALSEnever evaluated
(options & Qt:...enRecursively)Description
TRUEnever evaluated
FALSEnever evaluated
0
1169 QLayoutItem *r = item->layout()->replaceWidget(from, to, options);-
1170 if (r)
rDescription
TRUEnever evaluated
FALSEnever evaluated
0
1171 return r;
never executed: return r;
0
1172 }
never executed: end of block
0
1173 }
never executed: end of block
0
1174 if (index == -1)
index == -1Description
TRUEnever evaluated
FALSEnever evaluated
0
1175 return 0;
never executed: return 0;
0
1176-
1177 addChildWidget(to);-
1178 QLayoutItem *newitem = new QWidgetItem(to);-
1179 newitem->setAlignment(item->alignment());-
1180 QLayoutItem *r = d->replaceAt(index, newitem);-
1181 if (!r)
!rDescription
TRUEnever evaluated
FALSEnever evaluated
0
1182 delete newitem;
never executed: delete newitem;
0
1183 return r;
never executed: return r;
0
1184}-
1185-
1186/*!-
1187 \fn QLayoutItem *QLayout::itemAt(int index) const-
1188-
1189 Must be implemented in subclasses to return the layout item at \a-
1190 index. If there is no such item, the function must return 0.-
1191 Items are numbered consecutively from 0. If an item is deleted, other items will be renumbered.-
1192-
1193 This function can be used to iterate over a layout. The following-
1194 code will draw a rectangle for each layout item in the layout structure of the widget.-
1195-
1196 \snippet code/src_gui_kernel_qlayout.cpp 0-
1197-
1198 \sa count(), takeAt()-
1199*/-
1200-
1201/*!-
1202 \fn QLayoutItem *QLayout::takeAt(int index)-
1203-
1204 Must be implemented in subclasses to remove the layout item at \a-
1205 index from the layout, and return the item. If there is no such-
1206 item, the function must do nothing and return 0. Items are numbered-
1207 consecutively from 0. If an item is removed, other items will be-
1208 renumbered.-
1209-
1210 The following code fragment shows a safe way to remove all items-
1211 from a layout:-
1212-
1213 \snippet code/src_gui_kernel_qlayout.cpp 1-
1214-
1215 \sa itemAt(), count()-
1216*/-
1217-
1218/*!-
1219 \fn int *QLayout::count() const-
1220-
1221 Must be implemented in subclasses to return the number of items-
1222 in the layout.-
1223-
1224 \sa itemAt()-
1225*/-
1226-
1227/*!-
1228 Searches for widget \a widget in this layout (not including child-
1229 layouts).-
1230-
1231 Returns the index of \a widget, or -1 if \a widget is not found.-
1232-
1233 The default implementation iterates over all items using itemAt()-
1234*/-
1235int QLayout::indexOf(QWidget *widget) const-
1236{-
1237 int i = 0;-
1238 QLayoutItem *item = itemAt(i);-
1239 while (item) {
itemDescription
TRUEnever evaluated
FALSEnever evaluated
0
1240 if (item->widget() == widget)
item->widget() == widgetDescription
TRUEnever evaluated
FALSEnever evaluated
0
1241 return i;
never executed: return i;
0
1242 ++i;-
1243 item = itemAt(i);-
1244 }
never executed: end of block
0
1245 return -1;
never executed: return -1;
0
1246}-
1247-
1248/*!-
1249 \enum QLayout::SizeConstraint-
1250-
1251 The possible values are:-
1252-
1253 \value SetDefaultConstraint The main widget's minimum size is set-
1254 to minimumSize(), unless the widget already has-
1255 a minimum size.-
1256-
1257 \value SetFixedSize The main widget's size is set to sizeHint(); it-
1258 cannot be resized at all.-
1259 \value SetMinimumSize The main widget's minimum size is set to-
1260 minimumSize(); it cannot be smaller.-
1261-
1262 \value SetMaximumSize The main widget's maximum size is set to-
1263 maximumSize(); it cannot be larger.-
1264-
1265 \value SetMinAndMaxSize The main widget's minimum size is set to-
1266 minimumSize() and its maximum size is set to-
1267 maximumSize().-
1268-
1269 \value SetNoConstraint The widget is not constrained.-
1270-
1271 \sa setSizeConstraint()-
1272*/-
1273-
1274/*!-
1275 \property QLayout::sizeConstraint-
1276 \brief the resize mode of the layout-
1277-
1278 The default mode is \l {QLayout::SetDefaultConstraint}-
1279 {SetDefaultConstraint}.-
1280*/-
1281void QLayout::setSizeConstraint(SizeConstraint constraint)-
1282{-
1283 Q_D(QLayout);-
1284 if (constraint == d->constraint)
constraint == d->constraintDescription
TRUEnever evaluated
FALSEnever evaluated
0
1285 return;
never executed: return;
0
1286-
1287 d->constraint = constraint;-
1288 invalidate();-
1289}
never executed: end of block
0
1290-
1291QLayout::SizeConstraint QLayout::sizeConstraint() const-
1292{-
1293 Q_D(const QLayout);-
1294 return d->constraint;
never executed: return d->constraint;
0
1295}-
1296-
1297/*!-
1298 Returns the rectangle that should be covered when the geometry of-
1299 this layout is set to \a r, provided that this layout supports-
1300 setAlignment().-
1301-
1302 The result is derived from sizeHint() and expanding(). It is never-
1303 larger than \a r.-
1304*/-
1305QRect QLayout::alignmentRect(const QRect &r) const-
1306{-
1307 QSize s = sizeHint();-
1308 Qt::Alignment a = alignment();-
1309-
1310 /*-
1311 This is a hack to obtain the real maximum size, not-
1312 QSize(QLAYOUTSIZE_MAX, QLAYOUTSIZE_MAX), the value consistently-
1313 returned by QLayoutItems that have an alignment.-
1314 */-
1315 QLayout *that = const_cast<QLayout *>(this);-
1316 that->setAlignment(0);-
1317 QSize ms = that->maximumSize();-
1318 that->setAlignment(a);-
1319-
1320 if ((expandingDirections() & Qt::Horizontal) ||
(expandingDire...t::Horizontal)Description
TRUEnever evaluated
FALSEnever evaluated
0
1321 !(a & Qt::AlignHorizontal_Mask)) {
!(a & Qt::Alig...rizontal_Mask)Description
TRUEnever evaluated
FALSEnever evaluated
0
1322 s.setWidth(qMin(r.width(), ms.width()));-
1323 }
never executed: end of block
0
1324 if ((expandingDirections() & Qt::Vertical) ||
(expandingDire... Qt::Vertical)Description
TRUEnever evaluated
FALSEnever evaluated
0
1325 !(a & Qt::AlignVertical_Mask)) {
!(a & Qt::AlignVertical_Mask)Description
TRUEnever evaluated
FALSEnever evaluated
0
1326 s.setHeight(qMin(r.height(), ms.height()));-
1327 } else if (hasHeightForWidth()) {
never executed: end of block
hasHeightForWidth()Description
TRUEnever evaluated
FALSEnever evaluated
0
1328 int hfw = heightForWidth(s.width());-
1329 if (hfw < s.height())
hfw < s.height()Description
TRUEnever evaluated
FALSEnever evaluated
0
1330 s.setHeight(qMin(hfw, ms.height()));
never executed: s.setHeight(qMin(hfw, ms.height()));
0
1331 }
never executed: end of block
0
1332-
1333 s = s.boundedTo(r.size());-
1334 int x = r.x();-
1335 int y = r.y();-
1336-
1337 if (a & Qt::AlignBottom)
a & Qt::AlignBottomDescription
TRUEnever evaluated
FALSEnever evaluated
0
1338 y += (r.height() - s.height());
never executed: y += (r.height() - s.height());
0
1339 else if (!(a & Qt::AlignTop))
!(a & Qt::AlignTop)Description
TRUEnever evaluated
FALSEnever evaluated
0
1340 y += (r.height() - s.height()) / 2;
never executed: y += (r.height() - s.height()) / 2;
0
1341-
1342 QWidget *parent = parentWidget();-
1343 a = QStyle::visualAlignment(parent ? parent->layoutDirection() : QApplication::layoutDirection(), a);-
1344 if (a & Qt::AlignRight)
a & Qt::AlignRightDescription
TRUEnever evaluated
FALSEnever evaluated
0
1345 x += (r.width() - s.width());
never executed: x += (r.width() - s.width());
0
1346 else if (!(a & Qt::AlignLeft))
!(a & Qt::AlignLeft)Description
TRUEnever evaluated
FALSEnever evaluated
0
1347 x += (r.width() - s.width()) / 2;
never executed: x += (r.width() - s.width()) / 2;
0
1348-
1349 return QRect(x, y, s.width(), s.height());
never executed: return QRect(x, y, s.width(), s.height());
0
1350}-
1351-
1352/*!-
1353 Removes the widget \a widget from the layout. After this call, it-
1354 is the caller's responsibility to give the widget a reasonable-
1355 geometry or to put the widget back into a layout.-
1356-
1357 \b{Note:} The ownership of \a widget remains the same as-
1358 when it was added.-
1359-
1360 \sa removeItem(), QWidget::setGeometry(), addWidget()-
1361*/-
1362void QLayout::removeWidget(QWidget *widget)-
1363{-
1364 int i = 0;-
1365 QLayoutItem *child;-
1366 while ((child = itemAt(i))) {
(child = itemAt(i))Description
TRUEnever evaluated
FALSEnever evaluated
0
1367 if (child->widget() == widget) {
child->widget() == widgetDescription
TRUEnever evaluated
FALSEnever evaluated
0
1368 delete takeAt(i);-
1369 invalidate();-
1370 } else {
never executed: end of block
0
1371 ++i;-
1372 }
never executed: end of block
0
1373 }-
1374}
never executed: end of block
0
1375-
1376/*!-
1377 Removes the layout item \a item from the layout. It is the-
1378 caller's responsibility to delete the item.-
1379-
1380 Notice that \a item can be a layout (since QLayout inherits-
1381 QLayoutItem).-
1382-
1383 \sa removeWidget(), addItem()-
1384*/-
1385void QLayout::removeItem(QLayoutItem *item)-
1386{-
1387 int i = 0;-
1388 QLayoutItem *child;-
1389 while ((child = itemAt(i))) {
(child = itemAt(i))Description
TRUEnever evaluated
FALSEnever evaluated
0
1390 if (child == item) {
child == itemDescription
TRUEnever evaluated
FALSEnever evaluated
0
1391 takeAt(i);-
1392 invalidate();-
1393 } else {
never executed: end of block
0
1394 ++i;-
1395 }
never executed: end of block
0
1396 }-
1397}
never executed: end of block
0
1398-
1399/*!-
1400 Enables this layout if \a enable is true, otherwise disables it.-
1401-
1402 An enabled layout adjusts dynamically to changes; a disabled-
1403 layout acts as if it did not exist.-
1404-
1405 By default all layouts are enabled.-
1406-
1407 \sa isEnabled()-
1408*/-
1409void QLayout::setEnabled(bool enable)-
1410{-
1411 Q_D(QLayout);-
1412 d->enabled = enable;-
1413}
never executed: end of block
0
1414-
1415/*!-
1416 Returns \c true if the layout is enabled; otherwise returns \c false.-
1417-
1418 \sa setEnabled()-
1419*/-
1420bool QLayout::isEnabled() const-
1421{-
1422 Q_D(const QLayout);-
1423 return d->enabled;
never executed: return d->enabled;
0
1424}-
1425-
1426/*!-
1427 Returns a size that satisfies all size constraints on \a widget,-
1428 including heightForWidth() and that is as close as possible to \a-
1429 size.-
1430*/-
1431-
1432QSize QLayout::closestAcceptableSize(const QWidget *widget, const QSize &size)-
1433{-
1434 QSize result = size.boundedTo(qSmartMaxSize(widget));-
1435 result = result.expandedTo(qSmartMinSize(widget));-
1436 QLayout *l = widget->layout();-
1437 if (l && l->hasHeightForWidth() && result.height() < l->minimumHeightForWidth(result.width()) ) {
lDescription
TRUEnever evaluated
FALSEnever evaluated
l->hasHeightForWidth()Description
TRUEnever evaluated
FALSEnever evaluated
result.height(...esult.width())Description
TRUEnever evaluated
FALSEnever evaluated
0
1438 QSize current = widget->size();-
1439 int currentHfw = l->minimumHeightForWidth(current.width());-
1440 int newHfw = l->minimumHeightForWidth(result.width());-
1441 if (current.height() < currentHfw || currentHfw == newHfw) {
current.height() < currentHfwDescription
TRUEnever evaluated
FALSEnever evaluated
currentHfw == newHfwDescription
TRUEnever evaluated
FALSEnever evaluated
0
1442 //handle the constant hfw case and the vertical-only case, as well as the-
1443 // current-size-is-not-correct case-
1444 result.setHeight(newHfw);-
1445 } else {
never executed: end of block
0
1446 // binary search; assume hfw is decreasing ###-
1447-
1448 int maxw = qMax(widget->width(),result.width());-
1449 int maxh = qMax(widget->height(), result.height());-
1450 int minw = qMin(widget->width(),result.width());-
1451 int minh = qMin(widget->height(), result.height());-
1452-
1453 int minhfw = l->minimumHeightForWidth(minw);-
1454 int maxhfw = l->minimumHeightForWidth(maxw);-
1455 while (minw < maxw) {
minw < maxwDescription
TRUEnever evaluated
FALSEnever evaluated
0
1456 if (minhfw > maxh) { //assume decreasing
minhfw > maxhDescription
TRUEnever evaluated
FALSEnever evaluated
0
1457 minw = maxw - (maxw-minw)/2;-
1458 minhfw = l->minimumHeightForWidth(minw);-
1459 } else if (maxhfw < minh ) { //assume decreasing
never executed: end of block
maxhfw < minhDescription
TRUEnever evaluated
FALSEnever evaluated
0
1460 maxw = minw + (maxw-minw)/2;-
1461 maxhfw = l->minimumHeightForWidth(maxw);-
1462 } else {
never executed: end of block
0
1463 break;
never executed: break;
0
1464 }-
1465 }-
1466 result = result.expandedTo(QSize(minw, minhfw));-
1467 }
never executed: end of block
0
1468 }-
1469 return result;
never executed: return result;
0
1470}-
1471-
1472QT_END_NAMESPACE-
1473-
1474#include "moc_qlayout.cpp"-
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