graphicsview/qgraphicsanchorlayout.cpp

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41 -
42/*! -
43 \class QGraphicsAnchorLayout -
44 \brief The QGraphicsAnchorLayout class provides a layout where one can anchor widgets -
45 together in Graphics View. -
46 \since 4.6 -
47 \ingroup appearance -
48 \ingroup geomanagement -
49 \ingroup graphicsview-api -
50 \inmodule QtWidgets -
51 -
52 The anchor layout allows developers to specify how widgets should be placed relative to -
53 each other, and to the layout itself. The specification is made by adding anchors to the -
54 layout by calling addAnchor(), addAnchors() or addCornerAnchors(). -
55 -
56 Existing anchors in the layout can be accessed with the anchor() function. -
57 Items that are anchored are automatically added to the layout, and if items -
58 are removed, all their anchors will be automatically removed. -
59 -
60 \div {class="float-left"} -
61 \inlineimage simpleanchorlayout-example.png Using an anchor layout to align simple colored widgets. -
62 \enddiv -
63 -
64 Anchors are always set up between edges of an item, where the "center" is also considered to -
65 be an edge. Consider the following example: -
66 -
67 \snippet graphicsview/simpleanchorlayout/main.cpp adding anchors -
68 -
69 Here, the right edge of item \c a is anchored to the left edge of item \c b and the bottom -
70 edge of item \c a is anchored to the top edge of item \c b, with the result that -
71 item \c b will be placed diagonally to the right and below item \c b. -
72 -
73 The addCornerAnchors() function provides a simpler way of anchoring the corners -
74 of two widgets than the two individual calls to addAnchor() shown in the code -
75 above. Here, we see how a widget can be anchored to the top-left corner of the enclosing -
76 layout: -
77 -
78 \snippet graphicsview/simpleanchorlayout/main.cpp adding a corner anchor -
79 -
80 In cases where anchors are used to match the widths or heights of widgets, it is -
81 convenient to use the addAnchors() function. As with the other functions for specifying -
82 anchors, it can also be used to anchor a widget to a layout. -
83 -
84 \section1 Size Hints and Size Policies in an Anchor Layout -
85 -
86 QGraphicsAnchorLayout respects each item's size hints and size policies. -
87 Note that there are some properties of QSizePolicy that are \l{Known issues}{not respected}. -
88 -
89 \section1 Spacing within an Anchor Layout -
90 -
91 The layout may distribute some space between the items. If the spacing has not been -
92 explicitly specified, the actual amount of space will usually be 0. -
93 -
94 However, if the first edge is the \e opposite of the second edge (e.g., the right edge -
95 of the first widget is anchored to the left edge of the second widget), the size of the -
96 anchor will be queried from the style through a pixel metric: -
97 \l{QStyle::}{PM_LayoutHorizontalSpacing} for horizontal anchors and -
98 \l{QStyle::}{PM_LayoutVerticalSpacing} for vertical anchors. -
99 -
100 If the spacing is negative, the items will overlap to some extent. -
101 -
102 -
103 \section1 Known issues -
104 There are some features that QGraphicsAnchorLayout currently does not support. -
105 This might change in the future, so avoid using these features if you want to -
106 avoid any future regressions in behaviour: -
107 \list -
108 -
109 \li Stretch factors are not respected. -
110 -
111 \li QSizePolicy::ExpandFlag is not respected. -
112 -
113 \li Height for width is not respected. -
114 -
115 \endlist -
116 -
117 \sa QGraphicsLinearLayout, QGraphicsGridLayout, QGraphicsLayout -
118*/ -
119 -
120/*! -
121 \class QGraphicsAnchor -
122 \brief The QGraphicsAnchor class represents an anchor between two items in a -
123 QGraphicsAnchorLayout. -
124 \since 4.6 -
125 \ingroup appearance -
126 \ingroup geomanagement -
127 \ingroup graphicsview-api -
128 \inmodule QtWidgets -
129 -
130 The graphics anchor provides an API that enables you to query and manipulate the -
131 properties an anchor has. When an anchor is added to the layout with -
132 QGraphicsAnchorLayout::addAnchor(), a QGraphicsAnchor instance is returned where the properties -
133 are initialized to their default values. The properties can then be further changed, and they -
134 will be picked up the next time the layout is activated. -
135 -
136 \sa QGraphicsAnchorLayout::anchor() -
137 -
138*/ -
139#include "qgraphicsanchorlayout_p.h" -
140#ifndef QT_NO_GRAPHICSVIEW -
141QT_BEGIN_NAMESPACE -
142 -
143QGraphicsAnchor::QGraphicsAnchor(QGraphicsAnchorLayout *parentLayout) -
144 : QObject(*(new QGraphicsAnchorPrivate)) -
145{ -
146 Q_D(QGraphicsAnchor);
never executed (the execution status of this line is deduced): QGraphicsAnchorPrivate * const d = d_func();
-
147 Q_ASSERT(parentLayout);
never executed (the execution status of this line is deduced): qt_noop();
-
148 d->layoutPrivate = parentLayout->d_func();
never executed (the execution status of this line is deduced): d->layoutPrivate = parentLayout->d_func();
-
149}
never executed: }
0
150 -
151/*! -
152 Removes the QGraphicsAnchor object from the layout and destroys it. -
153*/ -
154QGraphicsAnchor::~QGraphicsAnchor() -
155{ -
156} -
157 -
158/*! -
159 \property QGraphicsAnchor::sizePolicy -
160 \brief the size policy for the QGraphicsAnchor. -
161 -
162 By setting the size policy on an anchor you can configure how the anchor can resize itself -
163 from its preferred spacing. For instance, if the anchor has the size policy -
164 QSizePolicy::Minimum, the spacing is the minimum size of the anchor. However, its size -
165 can grow up to the anchors maximum size. If the default size policy is QSizePolicy::Fixed, -
166 the anchor can neither grow or shrink, which means that the only size the anchor can have -
167 is the spacing. QSizePolicy::Fixed is the default size policy. -
168 QGraphicsAnchor always has a minimum spacing of 0 and a very large maximum spacing. -
169 -
170 \sa QGraphicsAnchor::spacing -
171*/ -
172 -
173void QGraphicsAnchor::setSizePolicy(QSizePolicy::Policy policy) -
174{ -
175 Q_D(QGraphicsAnchor);
never executed (the execution status of this line is deduced): QGraphicsAnchorPrivate * const d = d_func();
-
176 d->setSizePolicy(policy);
never executed (the execution status of this line is deduced): d->setSizePolicy(policy);
-
177}
never executed: }
0
178 -
179QSizePolicy::Policy QGraphicsAnchor::sizePolicy() const -
180{ -
181 Q_D(const QGraphicsAnchor);
never executed (the execution status of this line is deduced): const QGraphicsAnchorPrivate * const d = d_func();
-
182 return d->sizePolicy;
never executed: return d->sizePolicy;
0
183} -
184 -
185/*! -
186 \property QGraphicsAnchor::spacing -
187 \brief the preferred space between items in the QGraphicsAnchorLayout. -
188 -
189 Depending on the anchor type, the default spacing is either -
190 0 or a value returned from the style. -
191 -
192 \sa QGraphicsAnchorLayout::addAnchor() -
193*/ -
194void QGraphicsAnchor::setSpacing(qreal spacing) -
195{ -
196 Q_D(QGraphicsAnchor);
never executed (the execution status of this line is deduced): QGraphicsAnchorPrivate * const d = d_func();
-
197 d->setSpacing(spacing);
never executed (the execution status of this line is deduced): d->setSpacing(spacing);
-
198}
never executed: }
0
199 -
200qreal QGraphicsAnchor::spacing() const -
201{ -
202 Q_D(const QGraphicsAnchor);
never executed (the execution status of this line is deduced): const QGraphicsAnchorPrivate * const d = d_func();
-
203 return d->spacing();
never executed: return d->spacing();
0
204} -
205 -
206void QGraphicsAnchor::unsetSpacing() -
207{ -
208 Q_D(QGraphicsAnchor);
never executed (the execution status of this line is deduced): QGraphicsAnchorPrivate * const d = d_func();
-
209 d->unsetSpacing();
never executed (the execution status of this line is deduced): d->unsetSpacing();
-
210}
never executed: }
0
211 -
212/*! -
213 Constructs a QGraphicsAnchorLayout instance. \a parent is passed to -
214 QGraphicsLayout's constructor. -
215 */ -
216QGraphicsAnchorLayout::QGraphicsAnchorLayout(QGraphicsLayoutItem *parent) -
217 : QGraphicsLayout(*new QGraphicsAnchorLayoutPrivate(), parent) -
218{ -
219 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
220 d->createLayoutEdges();
never executed (the execution status of this line is deduced): d->createLayoutEdges();
-
221}
never executed: }
0
222 -
223/*! -
224 Destroys the QGraphicsAnchorLayout object. -
225*/ -
226QGraphicsAnchorLayout::~QGraphicsAnchorLayout() -
227{ -
228 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
229 -
230 for (int i = count() - 1; i >= 0; --i) {
never evaluated: i >= 0
0
231 QGraphicsLayoutItem *item = d->items.at(i);
never executed (the execution status of this line is deduced): QGraphicsLayoutItem *item = d->items.at(i);
-
232 removeAt(i);
never executed (the execution status of this line is deduced): removeAt(i);
-
233 if (item) {
never evaluated: item
0
234 if (item->ownedByLayout())
never evaluated: item->ownedByLayout()
0
235 delete item;
never executed: delete item;
0
236 }
never executed: }
0
237 }
never executed: }
0
238 -
239 d->removeCenterConstraints(this, QGraphicsAnchorLayoutPrivate::Horizontal);
never executed (the execution status of this line is deduced): d->removeCenterConstraints(this, QGraphicsAnchorLayoutPrivate::Horizontal);
-
240 d->removeCenterConstraints(this, QGraphicsAnchorLayoutPrivate::Vertical);
never executed (the execution status of this line is deduced): d->removeCenterConstraints(this, QGraphicsAnchorLayoutPrivate::Vertical);
-
241 d->deleteLayoutEdges();
never executed (the execution status of this line is deduced): d->deleteLayoutEdges();
-
242 -
243 Q_ASSERT(d->itemCenterConstraints[0].isEmpty());
never executed (the execution status of this line is deduced): qt_noop();
-
244 Q_ASSERT(d->itemCenterConstraints[1].isEmpty());
never executed (the execution status of this line is deduced): qt_noop();
-
245 Q_ASSERT(d->items.isEmpty());
never executed (the execution status of this line is deduced): qt_noop();
-
246 Q_ASSERT(d->m_vertexList.isEmpty());
never executed (the execution status of this line is deduced): qt_noop();
-
247}
never executed: }
0
248 -
249/*! -
250 Creates an anchor between the edge \a firstEdge of item \a firstItem and the edge \a secondEdge -
251 of item \a secondItem. The spacing of the anchor is picked up from the style. Anchors -
252 between a layout edge and an item edge will have a size of 0. -
253 If there is already an anchor between the edges, the new anchor will replace the old one. -
254 -
255 \a firstItem and \a secondItem are automatically added to the layout if they are not part -
256 of the layout. This means that count() can increase by up to 2. -
257 -
258 The spacing an anchor will get depends on the type of anchor. For instance, anchors from the -
259 Right edge of one item to the Left edge of another (or vice versa) will use the default -
260 horizontal spacing. The same behaviour applies to Bottom to Top anchors, (but they will use -
261 the default vertical spacing). For all other anchor combinations, the spacing will be 0. -
262 All anchoring functions will follow this rule. -
263 -
264 The spacing can also be set manually by using QGraphicsAnchor::setSpacing() method. -
265 -
266 Calling this function where \a firstItem or \a secondItem are ancestors of the layout have -
267 undefined behaviour. -
268 -
269 \sa addAnchors(), addCornerAnchors() -
270 */ -
271QGraphicsAnchor * -
272QGraphicsAnchorLayout::addAnchor(QGraphicsLayoutItem *firstItem, Qt::AnchorPoint firstEdge, -
273 QGraphicsLayoutItem *secondItem, Qt::AnchorPoint secondEdge) -
274{ -
275 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
276 QGraphicsAnchor *a = d->addAnchor(firstItem, firstEdge, secondItem, secondEdge);
never executed (the execution status of this line is deduced): QGraphicsAnchor *a = d->addAnchor(firstItem, firstEdge, secondItem, secondEdge);
-
277 invalidate();
never executed (the execution status of this line is deduced): invalidate();
-
278 return a;
never executed: return a;
0
279} -
280 -
281/*! -
282 Returns the anchor between the anchor points defined by \a firstItem and \a firstEdge and -
283 \a secondItem and \a secondEdge. If there is no such anchor, the function will return 0. -
284*/ -
285QGraphicsAnchor * -
286QGraphicsAnchorLayout::anchor(QGraphicsLayoutItem *firstItem, Qt::AnchorPoint firstEdge, -
287 QGraphicsLayoutItem *secondItem, Qt::AnchorPoint secondEdge) -
288{ -
289 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
290 return d->getAnchor(firstItem, firstEdge, secondItem, secondEdge);
never executed: return d->getAnchor(firstItem, firstEdge, secondItem, secondEdge);
0
291} -
292 -
293/*! -
294 Creates two anchors between \a firstItem and \a secondItem specified by the corners, -
295 \a firstCorner and \a secondCorner, where one is for the horizontal edge and another -
296 one for the vertical edge. -
297 -
298 This is a convenience function, since anchoring corners can be expressed as anchoring -
299 two edges. For instance: -
300 -
301 \snippet graphicsview/simpleanchorlayout/main.cpp adding a corner anchor in two steps -
302 -
303 This can also be achieved with the following line of code: -
304 -
305 \snippet graphicsview/simpleanchorlayout/main.cpp adding a corner anchor -
306 -
307 If there is already an anchor between the edge pairs, it will be replaced by the anchors that -
308 this function specifies. -
309 -
310 \a firstItem and \a secondItem are automatically added to the layout if they are not part of the -
311 layout. This means that count() can increase by up to 2. -
312 -
313 \sa addAnchor(), addAnchors() -
314*/ -
315void QGraphicsAnchorLayout::addCornerAnchors(QGraphicsLayoutItem *firstItem, -
316 Qt::Corner firstCorner, -
317 QGraphicsLayoutItem *secondItem, -
318 Qt::Corner secondCorner) -
319{ -
320 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
321 -
322 // Horizontal anchor -
323 Qt::AnchorPoint firstEdge = (firstCorner & 1 ? Qt::AnchorRight: Qt::AnchorLeft);
never evaluated: firstCorner & 1
0
324 Qt::AnchorPoint secondEdge = (secondCorner & 1 ? Qt::AnchorRight: Qt::AnchorLeft);
never evaluated: secondCorner & 1
0
325 if (d->addAnchor(firstItem, firstEdge, secondItem, secondEdge)) {
never evaluated: d->addAnchor(firstItem, firstEdge, secondItem, secondEdge)
0
326 // Vertical anchor -
327 firstEdge = (firstCorner & 2 ? Qt::AnchorBottom: Qt::AnchorTop);
never evaluated: firstCorner & 2
0
328 secondEdge = (secondCorner & 2 ? Qt::AnchorBottom: Qt::AnchorTop);
never evaluated: secondCorner & 2
0
329 d->addAnchor(firstItem, firstEdge, secondItem, secondEdge);
never executed (the execution status of this line is deduced): d->addAnchor(firstItem, firstEdge, secondItem, secondEdge);
-
330 -
331 invalidate();
never executed (the execution status of this line is deduced): invalidate();
-
332 }
never executed: }
0
333}
never executed: }
0
334 -
335/*! -
336 Anchors two or four edges of \a firstItem with the corresponding -
337 edges of \a secondItem, so that \a firstItem has the same size as -
338 \a secondItem in the dimensions specified by \a orientations. -
339 -
340 For example, the following example anchors the left and right edges of two items -
341 to match their widths: -
342 -
343 \snippet graphicsview/simpleanchorlayout/main.cpp adding anchors to match sizes in two steps -
344 -
345 This can also be achieved using the following line of code: -
346 -
347 \snippet graphicsview/simpleanchorlayout/main.cpp adding anchors to match sizes -
348 -
349 \sa addAnchor(), addCornerAnchors() -
350*/ -
351void QGraphicsAnchorLayout::addAnchors(QGraphicsLayoutItem *firstItem, -
352 QGraphicsLayoutItem *secondItem, -
353 Qt::Orientations orientations) -
354{ -
355 bool ok = true;
never executed (the execution status of this line is deduced): bool ok = true;
-
356 if (orientations & Qt::Horizontal) {
never evaluated: orientations & Qt::Horizontal
0
357 // Currently, if the first is ok, then the rest of the calls should be ok -
358 ok = addAnchor(secondItem, Qt::AnchorLeft, firstItem, Qt::AnchorLeft) != 0;
never executed (the execution status of this line is deduced): ok = addAnchor(secondItem, Qt::AnchorLeft, firstItem, Qt::AnchorLeft) != 0;
-
359 if (ok)
never evaluated: ok
0
360 addAnchor(firstItem, Qt::AnchorRight, secondItem, Qt::AnchorRight);
never executed: addAnchor(firstItem, Qt::AnchorRight, secondItem, Qt::AnchorRight);
0
361 }
never executed: }
0
362 if (orientations & Qt::Vertical && ok) {
never evaluated: orientations & Qt::Vertical
never evaluated: ok
0
363 addAnchor(secondItem, Qt::AnchorTop, firstItem, Qt::AnchorTop);
never executed (the execution status of this line is deduced): addAnchor(secondItem, Qt::AnchorTop, firstItem, Qt::AnchorTop);
-
364 addAnchor(firstItem, Qt::AnchorBottom, secondItem, Qt::AnchorBottom);
never executed (the execution status of this line is deduced): addAnchor(firstItem, Qt::AnchorBottom, secondItem, Qt::AnchorBottom);
-
365 }
never executed: }
0
366}
never executed: }
0
367 -
368/*! -
369 Sets the default horizontal spacing for the anchor layout to \a spacing. -
370 -
371 \sa horizontalSpacing(), setVerticalSpacing(), setSpacing() -
372*/ -
373void QGraphicsAnchorLayout::setHorizontalSpacing(qreal spacing) -
374{ -
375 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
376 -
377 d->spacings[0] = spacing;
never executed (the execution status of this line is deduced): d->spacings[0] = spacing;
-
378 invalidate();
never executed (the execution status of this line is deduced): invalidate();
-
379}
never executed: }
0
380 -
381/*! -
382 Sets the default vertical spacing for the anchor layout to \a spacing. -
383 -
384 \sa verticalSpacing(), setHorizontalSpacing(), setSpacing() -
385*/ -
386void QGraphicsAnchorLayout::setVerticalSpacing(qreal spacing) -
387{ -
388 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
389 -
390 d->spacings[1] = spacing;
never executed (the execution status of this line is deduced): d->spacings[1] = spacing;
-
391 invalidate();
never executed (the execution status of this line is deduced): invalidate();
-
392}
never executed: }
0
393 -
394/*! -
395 Sets the default horizontal and the default vertical spacing for the anchor layout to \a spacing. -
396 -
397 If an item is anchored with no spacing associated with the anchor, it will use the default -
398 spacing. -
399 -
400 QGraphicsAnchorLayout does not support negative spacings. Setting a negative value will unset the -
401 previous spacing and make the layout use the spacing provided by the current widget style. -
402 -
403 \sa setHorizontalSpacing(), setVerticalSpacing() -
404*/ -
405void QGraphicsAnchorLayout::setSpacing(qreal spacing) -
406{ -
407 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
408 -
409 d->spacings[0] = d->spacings[1] = spacing;
never executed (the execution status of this line is deduced): d->spacings[0] = d->spacings[1] = spacing;
-
410 invalidate();
never executed (the execution status of this line is deduced): invalidate();
-
411}
never executed: }
0
412 -
413/*! -
414 Returns the default horizontal spacing for the anchor layout. -
415 -
416 \sa verticalSpacing(), setHorizontalSpacing() -
417*/ -
418qreal QGraphicsAnchorLayout::horizontalSpacing() const -
419{ -
420 Q_D(const QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): const QGraphicsAnchorLayoutPrivate * const d = d_func();
-
421 return d->styleInfo().defaultSpacing(Qt::Horizontal);
never executed: return d->styleInfo().defaultSpacing(Qt::Horizontal);
0
422} -
423 -
424/*! -
425 Returns the default vertical spacing for the anchor layout. -
426 -
427 \sa horizontalSpacing(), setVerticalSpacing() -
428*/ -
429qreal QGraphicsAnchorLayout::verticalSpacing() const -
430{ -
431 Q_D(const QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): const QGraphicsAnchorLayoutPrivate * const d = d_func();
-
432 return d->styleInfo().defaultSpacing(Qt::Vertical);
never executed: return d->styleInfo().defaultSpacing(Qt::Vertical);
0
433} -
434 -
435/*! -
436 \reimp -
437*/ -
438void QGraphicsAnchorLayout::setGeometry(const QRectF &geom) -
439{ -
440 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
441 -
442 QGraphicsLayout::setGeometry(geom);
never executed (the execution status of this line is deduced): QGraphicsLayout::setGeometry(geom);
-
443 d->calculateVertexPositions(QGraphicsAnchorLayoutPrivate::Horizontal);
never executed (the execution status of this line is deduced): d->calculateVertexPositions(QGraphicsAnchorLayoutPrivate::Horizontal);
-
444 d->calculateVertexPositions(QGraphicsAnchorLayoutPrivate::Vertical);
never executed (the execution status of this line is deduced): d->calculateVertexPositions(QGraphicsAnchorLayoutPrivate::Vertical);
-
445 d->setItemsGeometries(geom);
never executed (the execution status of this line is deduced): d->setItemsGeometries(geom);
-
446}
never executed: }
0
447 -
448/*! -
449 Removes the layout item at \a index without destroying it. Ownership of -
450 the item is transferred to the caller. -
451 -
452 Removing an item will also remove any of the anchors associated with it. -
453 -
454 \sa itemAt(), count() -
455*/ -
456void QGraphicsAnchorLayout::removeAt(int index) -
457{ -
458 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
459 QGraphicsLayoutItem *item = d->items.value(index);
never executed (the execution status of this line is deduced): QGraphicsLayoutItem *item = d->items.value(index);
-
460 -
461 if (!item)
never evaluated: !item
0
462 return;
never executed: return;
0
463 -
464 // Removing an item affects both horizontal and vertical graphs -
465 d->removeCenterConstraints(item, QGraphicsAnchorLayoutPrivate::Horizontal);
never executed (the execution status of this line is deduced): d->removeCenterConstraints(item, QGraphicsAnchorLayoutPrivate::Horizontal);
-
466 d->removeCenterConstraints(item, QGraphicsAnchorLayoutPrivate::Vertical);
never executed (the execution status of this line is deduced): d->removeCenterConstraints(item, QGraphicsAnchorLayoutPrivate::Vertical);
-
467 d->removeAnchors(item);
never executed (the execution status of this line is deduced): d->removeAnchors(item);
-
468 d->items.remove(index);
never executed (the execution status of this line is deduced): d->items.remove(index);
-
469 -
470 item->setParentLayoutItem(0);
never executed (the execution status of this line is deduced): item->setParentLayoutItem(0);
-
471 invalidate();
never executed (the execution status of this line is deduced): invalidate();
-
472}
never executed: }
0
473 -
474/*! -
475 \reimp -
476*/ -
477int QGraphicsAnchorLayout::count() const -
478{ -
479 Q_D(const QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): const QGraphicsAnchorLayoutPrivate * const d = d_func();
-
480 return d->items.size();
never executed: return d->items.size();
0
481} -
482 -
483/*! -
484 \reimp -
485*/ -
486QGraphicsLayoutItem *QGraphicsAnchorLayout::itemAt(int index) const -
487{ -
488 Q_D(const QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): const QGraphicsAnchorLayoutPrivate * const d = d_func();
-
489 return d->items.value(index);
never executed: return d->items.value(index);
0
490} -
491 -
492/*! -
493 \reimp -
494*/ -
495void QGraphicsAnchorLayout::invalidate() -
496{ -
497 Q_D(QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): QGraphicsAnchorLayoutPrivate * const d = d_func();
-
498 QGraphicsLayout::invalidate();
never executed (the execution status of this line is deduced): QGraphicsLayout::invalidate();
-
499 d->calculateGraphCacheDirty = true;
never executed (the execution status of this line is deduced): d->calculateGraphCacheDirty = true;
-
500 d->styleInfoDirty = true;
never executed (the execution status of this line is deduced): d->styleInfoDirty = true;
-
501}
never executed: }
0
502 -
503/*! -
504 \reimp -
505*/ -
506QSizeF QGraphicsAnchorLayout::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const -
507{ -
508 Q_UNUSED(constraint);
never executed (the execution status of this line is deduced): (void)constraint;;
-
509 Q_D(const QGraphicsAnchorLayout);
never executed (the execution status of this line is deduced): const QGraphicsAnchorLayoutPrivate * const d = d_func();
-
510 -
511 // Some setup calculations are delayed until the information is -
512 // actually needed, avoiding unnecessary recalculations when -
513 // adding multiple anchors. -
514 -
515 // sizeHint() / effectiveSizeHint() already have a cache -
516 // mechanism, using invalidate() to force recalculation. However -
517 // sizeHint() is called three times after invalidation (for max, -
518 // min and pref), but we just need do our setup once. -
519 -
520 const_cast<QGraphicsAnchorLayoutPrivate *>(d)->calculateGraphs();
never executed (the execution status of this line is deduced): const_cast<QGraphicsAnchorLayoutPrivate *>(d)->calculateGraphs();
-
521 -
522 // ### apply constraint! -
523 QSizeF engineSizeHint(
never executed (the execution status of this line is deduced): QSizeF engineSizeHint(
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524 d->sizeHints[QGraphicsAnchorLayoutPrivate::Horizontal][which],
never executed (the execution status of this line is deduced): d->sizeHints[QGraphicsAnchorLayoutPrivate::Horizontal][which],
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525 d->sizeHints[QGraphicsAnchorLayoutPrivate::Vertical][which]);
never executed (the execution status of this line is deduced): d->sizeHints[QGraphicsAnchorLayoutPrivate::Vertical][which]);
-
526 -
527 qreal left, top, right, bottom;
never executed (the execution status of this line is deduced): qreal left, top, right, bottom;
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528 getContentsMargins(&left, &top, &right, &bottom);
never executed (the execution status of this line is deduced): getContentsMargins(&left, &top, &right, &bottom);
-
529 -
530 return engineSizeHint + QSizeF(left + right, top + bottom);
never executed: return engineSizeHint + QSizeF(left + right, top + bottom);
0
531} -
532 -
533QT_END_NAMESPACE -
534#endif //QT_NO_GRAPHICSVIEW -
535 -
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