org.jfree.chart.renderer.xy

Class XYSplineRenderer

public class XYSplineRenderer extends XYLineAndShapeRenderer

A renderer that connects data points with natural cubic splines and/or draws shapes at each data point. This renderer is designed for use with the XYPlot class. The example shown here is generated by the XYSplineRendererDemo1.java program included in the JFreeChart demo collection:

XYSplineRendererSample.png

Since: 1.0.7

Constructor Summary
XYSplineRenderer()
Creates a new instance with the 'precision' attribute defaulting to 5.
XYSplineRenderer(int precision)
Creates a new renderer with the specified precision.
Method Summary
protected voiddrawPrimaryLineAsPath(XYItemRendererState state, Graphics2D g2, XYPlot plot, XYDataset dataset, int pass, int series, int item, ValueAxis domainAxis, ValueAxis rangeAxis, Rectangle2D dataArea)
Draws the item (first pass).
booleanequals(Object obj)
Tests this renderer for equality with an arbitrary object.
intgetPrecision()
Get the resolution of splines.
XYItemRendererStateinitialise(Graphics2D g2, Rectangle2D dataArea, XYPlot plot, XYDataset data, PlotRenderingInfo info)
Initialises the renderer.
voidsetPrecision(int p)
Set the resolution of splines and sends a RendererChangeEvent to all registered listeners.

Constructor Detail

XYSplineRenderer

public XYSplineRenderer()
Creates a new instance with the 'precision' attribute defaulting to 5.

XYSplineRenderer

public XYSplineRenderer(int precision)
Creates a new renderer with the specified precision.

Parameters: precision the number of points between data items.

Method Detail

drawPrimaryLineAsPath

protected void drawPrimaryLineAsPath(XYItemRendererState state, Graphics2D g2, XYPlot plot, XYDataset dataset, int pass, int series, int item, ValueAxis domainAxis, ValueAxis rangeAxis, Rectangle2D dataArea)
Draws the item (first pass). This method draws the lines connecting the items. Instead of drawing separate lines, a GeneralPath is constructed and drawn at the end of the series painting.

Parameters: g2 the graphics device. state the renderer state. plot the plot (can be used to obtain standard color information etc). dataset the dataset. pass the pass. series the series index (zero-based). item the item index (zero-based). domainAxis the domain axis. rangeAxis the range axis. dataArea the area within which the data is being drawn.

equals

public boolean equals(Object obj)
Tests this renderer for equality with an arbitrary object.

Parameters: obj the object (null permitted).

Returns: A boolean.

getPrecision

public int getPrecision()
Get the resolution of splines.

Returns: Number of line segments between points.

See Also: XYSplineRenderer

initialise

public XYItemRendererState initialise(Graphics2D g2, Rectangle2D dataArea, XYPlot plot, XYDataset data, PlotRenderingInfo info)
Initialises the renderer.

This method will be called before the first item is rendered, giving the renderer an opportunity to initialise any state information it wants to maintain. The renderer can do nothing if it chooses.

Parameters: g2 the graphics device. dataArea the area inside the axes. plot the plot. data the data. info an optional info collection object to return data back to the caller.

Returns: The renderer state.

setPrecision

public void setPrecision(int p)
Set the resolution of splines and sends a RendererChangeEvent to all registered listeners.

Parameters: p number of line segments between points (must be > 0).

See Also: getPrecision

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