Method save

src/frontend/MainWin.cpp:1764–1882

! * auxiliary function that does the actual saving of the project */

 * auxiliary function that does the actual saving of the project
 */
bool MainWin::save(const QString& fileName) {
	DEBUG(Q_FUNC_INFO << ", file name = " << fileName.toStdString())
	QTemporaryFile tempFile(QDir::tempPath() + QLatin1Char('/') + QLatin1String("labplot_save_XXXXXX"));
	if (!tempFile.open()) {
		KMessageBox::error(this, i18n("Couldn't open the temporary file for writing."));
		return false;
	}

	WAIT_CURSOR;
	const QString& tempFileName = tempFile.fileName();
	DEBUG("Using temporary file " << STDSTRING(tempFileName))
	tempFile.close();

	QIODevice* file;
	// if file ending is .lml, do xz compression or gzip compression in compatibility mode
	const KConfigGroup group = Settings::group(QStringLiteral("Settings_General"));
	if (fileName.endsWith(QLatin1String(".lml"))) {
		if (group.readEntry("CompatibleSave", false))
			file = new KCompressionDevice(tempFileName, KCompressionDevice::GZip);
		else
			file = new KCompressionDevice(tempFileName, KCompressionDevice::Xz);
	} else // use file ending to find out how to compress file
		file = new KCompressionDevice(tempFileName);
	if (!file)
		file = new QFile(tempFileName);

	bool ok;
	if (file->open(QIODevice::WriteOnly)) {
		m_project->setFileName(fileName);

		// thumbnail, used for the project preview
		QPixmap thumbnail = centralWidget()->grab(centralWidget()->childrenRect());

		// instead of doing a screenshot of the whole application window including also the special docks (project explorer, etc.) above,
		// we can also implement the following two cases:
		// 1. if the states of the dock widgets are saved in the project file, do the screenshot of the whole window
		// 2. if the states are not saved, determine the area of dock widgets without the special docks.
		// The logic below is an attempt to achieve this but it doesn't produce the desired results in all cases,
		// for example not if some of dock widgets are placed above the special docks.
		// TODO: decide what to do with this logic.
		/*
		if (m_project->saveDockStates())
			thumbnail = centralWidget()->grab(centralWidget()->childrenRect());
		else {
			// determine the bounding rectangle of the content (area without the special docks like project explorer, etc.)
			const auto& docks = m_dockManagerContent->dockWidgetsMap();
			QRect rect;
			for (auto* dock : docks) {
				auto dockRect = QRect(dock->mapToGlobal(dock->geometry().topLeft()), dock->geometry().size());
				rect = rect.united(dockRect);
			}

			if (!rect.isEmpty())
				thumbnail = centralWidget()->grab(QRect(centralWidget()->mapFromGlobal(rect.topLeft()), rect.size()));
		}
		*/

		// set the state of the content dock widgets