qt-everywhere-src-5.14.1/qtquickcontrols2/src/imports/platform/widgets/qwidgetplatformdialog.cpp

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#include "qwidgetplatformdialog_p.h"

#include <QtGui/qwindow.h>
#include <QtWidgets/qdialog.h>

QT_BEGIN_NAMESPACE

bool QWidgetPlatformDialog::show(QDialog *dialog, Qt::WindowFlags flags, Qt::WindowModality modality, QWindow *parent)
{
    dialog->setWindowFlags(flags);
    dialog->setWindowModality(modality);

    dialog->createWinId();
    QWindow *handle = dialog->windowHandle();
    Q_ASSERT(handle);
    handle->setTransientParent(const_cast<QWindow *>(parent));

    dialog->show();
    return true;
}

QT_END_NAMESPACE