Method generate

src/frontend/matrix/MatrixFunctionDialog.cpp:194–264

};

void MatrixFunctionDialog::generate() {
	WAIT_CURSOR;

	m_matrix->beginMacro(i18n("%1: fill matrix with function values", m_matrix->name()));

	// TODO: data types
	auto* new_data = static_cast<QVector<QVector<double>>*>(m_matrix->data());

	// check if rows or cols == 1
	double diff = m_matrix->xEnd() - m_matrix->xStart();
	double xStep = 0.0;
	if (m_matrix->columnCount() > 1)
		xStep = diff / double(m_matrix->columnCount() - 1);

	diff = m_matrix->yEnd() - m_matrix->yStart();
	double yStep = 0.0;
	if (m_matrix->rowCount() > 1)
		yStep = diff / double(m_matrix->rowCount() - 1);

#ifndef NDEBUG
	QElapsedTimer timer;
	timer.start();
#endif

	// TODO: too slow because every parser thread needs an own symbol_table
	//  idea: use pool->maxThreadCount() symbol tables and reuse them?
	/*	double yStart = m_matrix->yStart();
		const int cols = m_matrix->columnCount();
		QThreadPool* pool = QThreadPool::globalInstance();
		int range = ceil(double(cols)/pool->maxThreadCount());
		DEBUG("Starting" << pool->maxThreadCount() << "threads. cols =" << cols << ": range =" << range);

		for (int i = 0; i < pool->maxThreadCount(); ++i) {
			const int start = i*range;
			int end = (i+1)*range;
			if (end > cols) end = cols;
			qDebug() << "start/end: " << start << end;
			const double xStart = m_matrix->xStart() + xStep*start;
			GenerateValueTask* task = new GenerateValueTask(start, end, new_data, xStart, yStart, xStep, yStep,
										qPrintable(ui.teEquation->toPlainText()));
			task->setAutoDelete(false);
			pool->start(task);
		}
		pool->waitForDone();
	*/
	double x = m_matrix->xStart();
	double y = m_matrix->yStart();
	Parsing::parser_var vars[] = {{"x", x}, {"y", y}};
	Parsing::Parser parser(true);
	for (int col = 0; col < m_matrix->columnCount(); ++col) {
		vars[0].value = x;
		for (int row = 0; row < m_matrix->rowCount(); ++row) {
			vars[1].value = y;
			(*new_data)[col][row] = parser.parse_with_vars(qPrintable(ui.teEquation->toPlainText()), vars, 2, qPrintable(QLocale().name()));
			y += yStep;
		}
		y = m_matrix->yStart();
		x += xStep;