Method distributionChanged

src/frontend/dockwidgets/QQPlotDock.cpp:198–241

}

void QQPlotDock::distributionChanged(int index) {
	const nsl_sf_stats_distribution dist = (nsl_sf_stats_distribution)ui.cbDistribution->itemData(index).toInt();

	QString file =
		QStandardPaths::locate(QStandardPaths::AppDataLocation,
							   QStringLiteral("pics/gsl_distributions/") + QLatin1String(nsl_sf_stats_distribution_pic_name[dist]) + QStringLiteral(".pdf"));
	QImage image = GuiTools::importPDFFile(file);

	// use system palette for background
	if (GuiTools::isDarkMode()) {
		// invert image if in dark mode
		image.invertPixels();

		for (int i = 0; i < image.size().width(); i++)
			for (int j = 0; j < image.size().height(); j++)
				if (qGray(image.pixel(i, j)) < 64) // 0-255: 0-64 covers all dark pixel
					image.setPixel(QPoint(i, j), palette().color(QPalette::Base).rgb());
	} else {
		for (int i = 0; i < image.size().width(); i++)
			for (int j = 0; j < image.size().height(); j++)
				if (qGray(image.pixel(i, j)) > 192) // 0-255: 224-255 covers all light pixel
					image.setPixel(QPoint(i, j), palette().color(QPalette::Base).rgb());
	}

	if (image.isNull()) {
		ui.lFunc->hide();
		ui.lFuncPic->hide();
	} else {
		// use light/dark background in the preview label
		QPalette p;
		p.setColor(QPalette::Window, palette().color(QPalette::Base));
		ui.lFuncPic->setAutoFillBackground(true);
		ui.lFuncPic->setPalette(p);
		ui.lFuncPic->setScaledContents(false);

		ui.lFuncPic->setPixmap(QPixmap::fromImage(image));
		ui.lFuncPic->show();
	}

	CONDITIONAL_LOCK_RETURN;

	for (auto* plot : m_plots)
		plot->setDistribution(dist);
}

//*************************************************************
//*********** SLOTs for changes triggered in QQPlot *******