FolderDialog.qml

import QtQuick 2.10
import QtQuick.Controls 2.3
import Qt.labs.platform 1.0 as Labs
import de.skycoder42.QtMvvm.Core 1.0
import de.skycoder42.QtMvvm.Quick 1.0

Labs.FolderDialog {
    id: _folderDialog

    property var msgConfig
    property MessageResult msgResult

    signal closed()

    title: msgConfig.title
    modality: Qt.WindowModal
    folder: msgConfig.defaultValue

    Component.onCompleted: {
        if(msgResult)
            msgResult.setCloseTarget(_folderDialog, "reject()");
    }

    onAccepted: {
        if(msgResult) {
            msgResult.complete(MessageConfig.Ok, _folderDialog.currentFolder);
            msgResult = null;
        }
        closed();
    }

    onRejected: {
        if(msgResult) {
            msgResult.complete(MessageConfig.Cancel);
            msgResult = null;
        }
        closed();
    }
}