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I have updatable OHLCChart. I need to draw a line over chart.
How to implement it?
680
To create a line chart, at a minimum, you must define two axes, create the LineChart object by instantiating the LineChart class, create one or more series of data by using the XYChart. Series class, and assign the data to the chart.
Creating a Bar Chart To build a bar chart in your JavaFX application, create two axes, instantiate the BarChar class, define the series of data, and assign the data to the chart. Example 7-1 creates a bar chart with three series of data to present financial information about five countries.
If you want to draw a vertical or horizontal line at a given position on an axis, you can use a ValueMarker :
ValueMarker marker = new ValueMarker(position); // position is the value on the axis
marker.setPaint(Color.black);
//marker.setLabel("here"); // see JavaDoc for labels, colors, strokes
XYPlot plot = (XYPlot) chart.getPlot();
plot.addDomainMarker(marker);
Use plot.addRangeMarker() if you want to draw an horizontal line.
135
Something like this should work if you want to plot a line indicator (like a moving average for example):
XYDataset dataSet = // your line dataset
CombinedDomainXYPlot plot = (CombinedDomainXYPlot) chart.getPlot();
XYPlot plot = (XYPlot) plot.getSubplots().get(0);
int dataSetIndx = plot.getDatasetCount();
plot.setDataset(dataSetIndx, dataSet);
XYLineAndShapeRenderer lineRenderer = new XYLineAndShapeRenderer(true, false);
plot.setRenderer(dataSetIndx, lineRenderer);
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