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Fix bug in QGraphicsItem::isVisibleTo().

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Task-number: QTBUG-21612
Reviewed-by: James Perrett
Reviewed-by: Magne Pettersen Zachrisen

Change-Id: I570c673a817c3c01593fcd7fa46d545f34e2c38d
Merge-request: 1396
Reviewed-by: Jan-Arve Saether <jan-arve.saether@nokia.com>
Reviewed-on: http://codereview.qt-project.org/5927
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Jan-Arve Sæther <jan-arve.saether@nokia.com>
This commit is contained in:
Andreas Aardal Hanssen 2011-09-29 14:54:15 +02:00 committed by Qt by Nokia
parent 5ea2eab00d
commit e4207a79d1
2 changed files with 119 additions and 9 deletions
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16
src/widgets/graphicsview/qgraphicsitem.cpp
View File

@ -2238,7 +2238,8 @@ bool QGraphicsItem::isVisible() const
returned. \a parent can be 0, in which case this function will return
whether the item is visible to the scene or not.
An item may not be visible to its ancestors even if isVisible() is true. If
An item may not be visible to its ancestors even if isVisible() is true. It
may also be visible to its ancestors even if isVisible() is false. If
any ancestor is hidden, the item itself will be implicitly hidden, in which
case this function will return false.
@ -2246,15 +2247,16 @@ bool QGraphicsItem::isVisible() const
*/
bool QGraphicsItem::isVisibleTo(const QGraphicsItem *parent) const
{
if (!d_ptr->visible)
const QGraphicsItem *p = this;
if (d_ptr->explicitlyHidden)
return false;
if (parent == this)
return true;
if (parentItem() && parentItem()->isVisibleTo(parent))
return true;
if (!parent && !parentItem())
do {
if (p == parent)
return true;
if (p->d_ptr->explicitlyHidden)
return false;
} while ((p = p->d_ptr->parent));
return parent == 0;
}
/*!

108
tests/auto/qgraphicsitem/tst_qgraphicsitem.cpp
View File

@ -305,6 +305,7 @@ private slots:
void inputMethodHints();
void toolTip();
void visible();
void isVisibleTo();
void explicitlyVisible();
void enabled();
void explicitlyEnabled();
@ -1138,6 +1139,113 @@ void tst_QGraphicsItem::visible()
QVERIFY(!item->hasFocus());
}
void tst_QGraphicsItem::isVisibleTo()
{
QGraphicsScene scene;
QGraphicsItem *parent = scene.addRect(QRectF(0, 0, 100, 100));
QGraphicsItem *child = scene.addRect(QRectF(25, 25, 50, 50));
QGraphicsItem *grandChild = scene.addRect(QRectF(50, 50, 50, 50));
QGraphicsItem *stranger = scene.addRect(100, 100, 100, 100);
child->setParentItem(parent);
grandChild->setParentItem(child);
QVERIFY(grandChild->isVisible());
QVERIFY(grandChild->isVisibleTo(grandChild));
QVERIFY(grandChild->isVisibleTo(child));
QVERIFY(grandChild->isVisibleTo(parent));
QVERIFY(grandChild->isVisibleTo(0));
QVERIFY(child->isVisible());
QVERIFY(child->isVisibleTo(child));
QVERIFY(child->isVisibleTo(parent));
QVERIFY(child->isVisibleTo(0));
QVERIFY(parent->isVisible());
QVERIFY(parent->isVisibleTo(parent));
QVERIFY(parent->isVisibleTo(0));
QVERIFY(!parent->isVisibleTo(child));
QVERIFY(!child->isVisibleTo(grandChild));
QVERIFY(!grandChild->isVisibleTo(stranger));
QVERIFY(!child->isVisibleTo(stranger));
QVERIFY(!parent->isVisibleTo(stranger));
QVERIFY(!stranger->isVisibleTo(grandChild));
QVERIFY(!stranger->isVisibleTo(child));
QVERIFY(!stranger->isVisibleTo(parent));
// Case 1: only parent is explicitly hidden
parent->hide();
QVERIFY(!grandChild->isVisible());
QVERIFY(grandChild->isVisibleTo(grandChild));
QVERIFY(grandChild->isVisibleTo(child));
QVERIFY(grandChild->isVisibleTo(parent));
QVERIFY(!grandChild->isVisibleTo(0));
QVERIFY(!child->isVisible());
QVERIFY(child->isVisibleTo(child));
QVERIFY(child->isVisibleTo(parent));
QVERIFY(!child->isVisibleTo(0));
QVERIFY(!parent->isVisible());
QVERIFY(!parent->isVisibleTo(parent));
QVERIFY(!parent->isVisibleTo(0));
QVERIFY(!parent->isVisibleTo(child));
QVERIFY(!child->isVisibleTo(grandChild));
QVERIFY(!grandChild->isVisibleTo(stranger));
QVERIFY(!child->isVisibleTo(stranger));
QVERIFY(!parent->isVisibleTo(stranger));
QVERIFY(!stranger->isVisibleTo(grandChild));
QVERIFY(!stranger->isVisibleTo(child));
QVERIFY(!stranger->isVisibleTo(parent));
// Case 2: only child is hidden
parent->show();
child->hide();
QVERIFY(!grandChild->isVisible());
QVERIFY(grandChild->isVisibleTo(grandChild));
QVERIFY(grandChild->isVisibleTo(child));
QVERIFY(!grandChild->isVisibleTo(parent));
QVERIFY(!grandChild->isVisibleTo(0));
QVERIFY(!child->isVisible());
QVERIFY(!child->isVisibleTo(child));
QVERIFY(!child->isVisibleTo(parent));
QVERIFY(!child->isVisibleTo(0));
QVERIFY(parent->isVisible());
QVERIFY(parent->isVisibleTo(parent));
QVERIFY(parent->isVisibleTo(0));
QVERIFY(!parent->isVisibleTo(child));
QVERIFY(!child->isVisibleTo(grandChild));
QVERIFY(!grandChild->isVisibleTo(stranger));
QVERIFY(!child->isVisibleTo(stranger));
QVERIFY(!parent->isVisibleTo(stranger));
QVERIFY(!stranger->isVisibleTo(grandChild));
QVERIFY(!stranger->isVisibleTo(child));
QVERIFY(!stranger->isVisibleTo(parent));
// Case 3: only grand child is hidden
child->show();
grandChild->hide();
QVERIFY(!grandChild->isVisible());
QVERIFY(!grandChild->isVisibleTo(grandChild));
QVERIFY(!grandChild->isVisibleTo(child));
QVERIFY(!grandChild->isVisibleTo(parent));
QVERIFY(!grandChild->isVisibleTo(0));
QVERIFY(child->isVisible());
QVERIFY(child->isVisibleTo(child));
QVERIFY(child->isVisibleTo(parent));
QVERIFY(child->isVisibleTo(0));
QVERIFY(parent->isVisible());
QVERIFY(parent->isVisibleTo(parent));
QVERIFY(parent->isVisibleTo(0));
QVERIFY(!parent->isVisibleTo(child));
QVERIFY(!child->isVisibleTo(grandChild));
QVERIFY(!grandChild->isVisibleTo(stranger));
QVERIFY(!child->isVisibleTo(stranger));
QVERIFY(!parent->isVisibleTo(stranger));
QVERIFY(!stranger->isVisibleTo(grandChild));
QVERIFY(!stranger->isVisibleTo(child));
QVERIFY(!stranger->isVisibleTo(parent));
}
void tst_QGraphicsItem::explicitlyVisible()
{
QGraphicsScene scene;