linesOnly.setSelected(drawLines && !drawMarkers);
markersOnly.setSelected(!drawLines && drawMarkers);
markersAndLines.setSelected(drawLines && drawMarkers);
cachedFlags = new PlotLineDrawingFlags(drawLines, drawMarkers);
cachedConnectionType = settings.getPlotLineConnectionType();
direct.setSelected(cachedConnectionType == PlotLineConnectionType.DIRECT);
step.setSelected(cachedConnectionType == PlotLineConnectionType.STEP_X_THEN_Y);
}