Revision control
++ // Copyright (C) 2024 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "calendarBackendInterface.h"
++
++ #include <QApplication>
++ #include <QCalendar>
++ #include <QCalendarWidget>
++ #include <QCommandLineParser>
++ #include <QDebug>
++ #include <QPluginLoader>
++
++ int main(int argc, char *argv[])
++ {
++ QApplication a(argc, argv);
++
++ QCoreApplication::setApplicationName("JulianGregorianCalendar");
++ QCommandLineParser parser;
++ parser.setApplicationDescription("Calendar Backend Plugin Example");
++ parser.addHelpOption();
++ parser.addPositionalArgument("date; names",
++ "Date of transition between "
++ "Julian and Gregorian calendars "
++ "as string in the format 'yyyy-MM-dd;'. Optionally, user can "
++ "provide names for the calendar separated with ';'");
++ parser.process(a);
++ const QStringList args = parser.positionalArguments();
++ if (args.isEmpty())
++ parser.showHelp(1);
++ if (args.at(0).isEmpty())
++ parser.showHelp(1);
++ //![0]
++ QPluginLoader loader;
++ loader.setFileName("../plugin/calendarPlugin");
++ loader.load();
++ if (!loader.isLoaded())
++ return 1;
++ auto *myplugin = qobject_cast<RequestedCalendarInterface*>(loader.instance());
++ //![0]
++ //![1]
++ const auto cid = myplugin->loadCalendar(args.at(0));
++ if (!cid.isValid()) {
++ qWarning() << "Invalid ID";
++ parser.showHelp(1);
++ }
++ const QCalendar calendar(cid);
++ //![1]
++ //![2]
++ QCalendarWidget widget;
++ widget.setCalendar(calendar);
++ widget.show();
++ QCalendar::YearMonthDay when = { 1582, 10, 4 };
++ QCalendar julian = QCalendar(QCalendar::System::Julian);
++ auto got = QDate::fromString(args.at(0).left(10), u"yyyy-MM-dd", julian);
++ if (got.isValid())
++ when = julian.partsFromDate(got);
++ widget.setCurrentPage(when.year, when.month);
++ //![2]
++ return a.exec();
++ }