allow qml demo choose special effect

Yuhang Zhao

2023-12-28 68c8cc026233e9694579ce38b8daa25008477d18

 src/quick/quickitemdelegate.cpp

@@ -68,6 +68,10 @@
        static_cast<QQuickWindow *>(host)->setFlags(flags);
    }

    void QuickItemDelegate::setWindowVisible(QObject *host, bool visible) const {
        static_cast<QQuickWindow *>(host)->setVisible(visible);
    }

    void QuickItemDelegate::bringWindowToTop(QObject *host) const {
        static_cast<QQuickWindow *>(host)->raise();
    }