C++ (Cpp) QDockWidget::mapToGlobal示例

void tst_QDockWidget::setFloating()
{
    const QRect deskRect = QApplication::desktop()->availableGeometry();
    QMainWindow mw;
    mw.move(deskRect.left() + deskRect.width() * 2 / 3, deskRect.top() + deskRect.height() / 3);
    QDockWidget dw;
    mw.addDockWidget(Qt::LeftDockWidgetArea, &dw);

    mw.show();
    QVERIFY(QTest::qWaitForWindowExposed(&mw));

    QVERIFY(!dw.isFloating());
    const QPoint dockedPosition = dw.mapToGlobal(dw.pos());

    QSignalSpy spy(&dw, SIGNAL(topLevelChanged(bool)));

    dw.setFloating(true);
    const QPoint floatingPosition = dw.pos();

    // QTBUG-31044, show approximately at old position, give or take window frame.
    QVERIFY((dockedPosition - floatingPosition).manhattanLength() < 50);

    QVERIFY(dw.isFloating());
    QCOMPARE(spy.count(), 1);
    QCOMPARE(spy.at(0).value(0).toBool(), dw.isFloating());
    spy.clear();
    dw.setFloating(dw.isFloating());
    QCOMPARE(spy.count(), 0);
    spy.clear();

    dw.setFloating(false);
    QVERIFY(!dw.isFloating());
    QCOMPARE(spy.count(), 1);
    QCOMPARE(spy.at(0).value(0).toBool(), dw.isFloating());
    spy.clear();
    dw.setFloating(dw.isFloating());
    QCOMPARE(spy.count(), 0);
    spy.clear();
}