void tst_QOpenGLWidget::painter()
{
QWidget w;
PainterWidget *glw = new PainterWidget(&w);
w.resize(640, 480);
glw->resize(320, 200);
w.show();
QTest::qWaitForWindowExposed(&w);
QImage image = glw->grabFramebuffer();
QCOMPARE(image.width(), glw->width());
QCOMPARE(image.height(), glw->height());
QVERIFY(image.pixel(20, 10) == qRgb(0, 0, 255));
glw->m_clear = true;
image = glw->grabFramebuffer();
QVERIFY(image.pixel(20, 10) == qRgb(0, 255, 0));
}
void tst_QOpenGLWidget::reparentToNotYetCreated()
{
QWidget w1;
PainterWidget *glw = new PainterWidget(&w1);
w1.resize(640, 480);
glw->resize(320, 200);
w1.show();
QTest::qWaitForWindowExposed(&w1);
QWidget w2;
glw->setParent(&w2);
w2.show();
QTest::qWaitForWindowExposed(&w2);
QImage image = glw->grabFramebuffer();
QCOMPARE(image.width(), 320);
QCOMPARE(image.height(), 200);
QVERIFY(image.pixel(20, 10) == qRgb(0, 0, 255));
}