void tst_QGraphicsEffect::graphicsEffectUpdateShouldNotInvalidateGraphicsItemCache()
{
QGraphicsScene scene;
MyGraphicsItem parent;
parent.resize(200, 200);
parent.setCacheMode(QGraphicsItem::ItemCoordinateCache);
scene.addItem(&parent);
QGraphicsView view(&scene);
view.show();
QApplication::setActiveWindow(&view);
QTest::qWaitForWindowShown(&view);
QTRY_COMPARE(parent.nbPaint, 1);
//we set an effect on the parent
MyGraphicsEffect* opacityEffect = new MyGraphicsEffect(&parent);
opacityEffect->update();
parent.setGraphicsEffect(opacityEffect);
//flush the events
QApplication::processEvents();
//new effect applied->repaint
QCOMPARE(parent.nbPaint, 1);
opacityEffect->update();
//flush the events
QApplication::processEvents();
//A change to the effect shouldn't invalidate the graphicsitem's cache
// => it shouldn't trigger a paint
QCOMPARE(parent.nbPaint, 1);
}
void tst_QGraphicsEffect::graphicsEffectUpdateShouldInvalidateParentGraphicsEffect()
{
QGraphicsScene scene;
// Add the parent
MyGraphicsItem parent;
parent.resize(200, 200);
scene.addItem(&parent);
// Add a child to the parent
MyGraphicsItem child(&parent);
child.resize(100, 100);
QGraphicsView view(&scene);
view.show();
QApplication::setActiveWindow(&view);
QTest::qWaitForWindowShown(&view);
//flush the events
QApplication::processEvents();
#ifdef Q_OS_MAC
if (QSysInfo::MacintoshVersion == QSysInfo::MV_LION) {
QEXPECT_FAIL("", "QTBUG-26858", Abort);
}
#endif
QTRY_COMPARE(parent.nbPaint, 1);
QTRY_COMPARE(child.nbPaint, 1);
//we set an effect on the parent and the child
MyGraphicsEffect* effectForParent = new MyGraphicsEffect(&parent);
parent.setGraphicsEffect(effectForParent);
MyGraphicsEffect* effectForChild = new MyGraphicsEffect(&child);
child.setGraphicsEffect(effectForChild);
//flush the events
QApplication::processEvents();
// Both effects should start with no source invalidations
QCOMPARE(effectForParent->nbSourceInvalidations, 0);
QCOMPARE(effectForChild->nbSourceInvalidations, 0);
// Trigger an update of the child graphics effect
effectForChild->update();
//flush the events
QApplication::processEvents();
// An update of the effect on the child shouldn't tell that effect that its source has been invalidated
QCOMPARE(effectForChild->nbSourceInvalidations, 0);
// The effect on the parent should however be notified of an invalidated source
QCOMPARE(effectForParent->nbSourceInvalidations, 1);
}
