void tst_QGraphicsEffect::draw() { QGraphicsScene scene; CustomItem *item = new CustomItem(0, 0, 100, 100); scene.addItem(item); QGraphicsView view(&scene); view.show(); QTest::qWaitForWindowShown(&view); QTRY_VERIFY(item->numRepaints > 0); item->reset(); // Make sure installing the effect triggers a repaint. CustomEffect *effect = new CustomEffect; item->setGraphicsEffect(effect); QTRY_COMPARE(effect->numRepaints, 1); QTRY_COMPARE(item->numRepaints, 1); // Make sure QPainter* and QStyleOptionGraphicsItem* stays persistent // during QGraphicsEffect::draw/QGraphicsItem::paint. QVERIFY(effect->m_painter); QCOMPARE(effect->m_painter, item->m_painter); QCOMPARE(effect->m_styleOption, item->m_styleOption); // Make sure QGraphicsEffect::source is persistent. QCOMPARE(effect->m_source, effect->source()); effect->reset(); item->reset(); // Make sure updating the source triggers a repaint. item->update(); QTRY_COMPARE(effect->numRepaints, 1); QTRY_COMPARE(item->numRepaints, 1); QVERIFY(effect->m_sourceChangedFlags & QGraphicsEffect::SourceInvalidated); effect->reset(); item->reset(); // Make sure changing the effect's bounding rect triggers a repaint. effect->setMargin(20); QTRY_COMPARE(effect->numRepaints, 1); QTRY_COMPARE(item->numRepaints, 1); effect->reset(); item->reset(); // Make sure change the item's bounding rect triggers a repaint. item->setRect(0, 0, 50, 50); QTRY_COMPARE(effect->numRepaints, 1); QTRY_COMPARE(item->numRepaints, 1); QVERIFY(effect->m_sourceChangedFlags & QGraphicsEffect::SourceBoundingRectChanged); effect->reset(); item->reset(); // Make sure the effect is the one to issue a repaint of the item. effect->doNothingInDraw = true; item->update(); QTRY_COMPARE(effect->numRepaints, 1); QCOMPARE(item->numRepaints, 0); effect->doNothingInDraw = false; effect->reset(); item->reset(); // Make sure we update the source when disabling/enabling the effect. effect->setEnabled(false); QTest::qWait(50); QCOMPARE(effect->numRepaints, 0); QCOMPARE(item->numRepaints, 1); effect->reset(); item->reset(); effect->setEnabled(true); QTRY_COMPARE(effect->numRepaints, 1); QTRY_COMPARE(item->numRepaints, 1); effect->reset(); item->reset(); // Effect is already enabled; nothing should happen. effect->setEnabled(true); QTest::qWait(50); QCOMPARE(effect->numRepaints, 0); QCOMPARE(item->numRepaints, 0); // Make sure uninstalling an effect triggers a repaint. QPointer<CustomEffect> ptr = effect; item->setGraphicsEffect(0); QVERIFY(!ptr); QTRY_COMPARE(item->numRepaints, 1); }