private Chart createChart(int points) {
Chart chart = new Chart(ChartType.SCATTER);
Configuration conf = chart.getConfiguration();
conf.getChart().setZoomType(ZoomType.XY);
conf.disableCredits();
conf.setTitle("Height vs Weight");
conf.setSubTitle("Polygon series in Vaadin Charts.");
Tooltip tooltip = conf.getTooltip();
tooltip.setHeaderFormat("{series.name}");
tooltip.setPointFormat("{point.x} cm, {point.y} kg");
XAxis xAxis = conf.getxAxis();
xAxis.setStartOnTick(true);
xAxis.setEndOnTick(true);
xAxis.setShowLastLabel(true);
xAxis.setTitle("Height (cm)");
YAxis yAxis = conf.getyAxis();
yAxis.setTitle("Weight (kg)");
AbstractLinePlotOptions plotOptions = new PlotOptionsScatter();
plotOptions.setThreshold(0);
DataSeries scatter = new DataSeries();
scatter.setPlotOptions(plotOptions);
scatter.setName("Observations");
fillScatter(scatter, points);
conf.addSeries(scatter);
return chart;
}
/**
* Sets the y label of the axes. The font names understood are those understood by
* java.awt.Font.decode(). If the font name is null, the font remains unchanged.
*
* @param s the title
* @param font_name an optional font name
*/
public void setYLabel(String s, String font_name) {
yaxis.setTitle(s, font_name);
}