com.jidesoft.chart.render
Class SmoothLineRenderer

java.lang.Object
  com.jidesoft.chart.render.AbstractLineRenderer
      com.jidesoft.chart.render.SmoothLineRenderer

All Implemented Interfaces:

LineRenderer, LineRenderer2D

public class SmoothLineRenderer
extends AbstractLineRenderer
implements LineRenderer2D

A renderer for drawing lines smoothly on a chart. Rather than rendering a line by drawing straight line segments to join the points of a ChartModel (like the DefaultLineRenderer), this class uses Bezier curves to join the points.

Field Summary

static String	PROPERTY_CHART
static String	PROPERTY_SMOOTHNESS

Constructor Summary

SmoothLineRenderer(Chart chart)
Creates a DefaultLineRenderer using the supplied chart object as the chart object onto which lines should be drawn.

Method Summary

void	addPropertyChangeListener(PropertyChangeListener listener) Adds a property change listener to this object
Chart	getChart() Returns the chart associated with this renderer
double	getSmoothness() Returns the smoothness factor used in generating a curve between points
void	removePropertyChangeListener(PropertyChangeListener listener) Remove the supplied property change listener from this object
Shape	renderLine(Graphics2D g2d, ChartModel m, double[] xPoints, double[] yPoints, ChartStyle style) Render lines using the supplied arrays of x and y pixel coordinates onto the supplied Graphics context.
Shape	renderLine(Graphics g, ChartModel m, int[] xPoints, int[] yPoints, ChartStyle style) Render lines using the supplied arrays of x and y pixel coordinates onto the supplied Graphics context.
void	setChart(Chart chart) Sets the chart onto which the lines should be drawn.
void	setSmoothness(double smoothness) Specify the smoothness to use in generating a curve to join points.

Methods inherited from class com.jidesoft.chart.render.AbstractLineRenderer

calculateXHorizontalExtent, calculateYVerticalExtent, createLineFillPaint

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

PROPERTY_CHART

public static final String PROPERTY_CHART

See Also:

Constant Field Values

PROPERTY_SMOOTHNESS

public static final String PROPERTY_SMOOTHNESS

See Also:

Constant Field Values

Constructor Detail

SmoothLineRenderer

public SmoothLineRenderer(Chart chart)

Creates a DefaultLineRenderer using the supplied chart object as the chart object onto which lines should be drawn.

Parameters:

chart - the chart object

Method Detail

getChart

public Chart getChart()

Returns the chart associated with this renderer

Returns:

the chart object associated with this renderer

setChart

public void setChart(Chart chart)

Sets the chart onto which the lines should be drawn.

Note: The chart property is implemented as a weak reference so that it will be garbage collected when it is no longer needed. This saves you from having to call setChart(null) on this object when you have finished with the renderer.

Parameters:

chart - the Chart object

getSmoothness

public double getSmoothness()

Returns the smoothness factor used in generating a curve between points

Returns:

the smoothness factor used in generating a curve between points

setSmoothness

public void setSmoothness(double smoothness)

Specify the smoothness to use in generating a curve to join points.

Parameters:

smoothness - the smoothness factor used in generating a curve between points

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener listener)

Adds a property change listener to this object

Parameters:

listener - a property change listener

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener listener)

Remove the supplied property change listener from this object

Parameters:

listener - the property change listener to remove

renderLine

public Shape renderLine(Graphics2D g2d,
                        ChartModel m,
                        double[] xPoints,
                        double[] yPoints,
                        ChartStyle style)

Render lines using the supplied arrays of x and y pixel coordinates onto the supplied Graphics context.

Specified by:

renderLine in interface LineRenderer2D

Parameters:

g2d - the Graphics context

m - the ChartModel from which the points originated

xPoints - an array of x coordinates

yPoints - an array of y coordinates

style - the suggested style for rendering (a custom renderer may choose to ignore this)

renderLine

public Shape renderLine(Graphics g,
                        ChartModel m,
                        int[] xPoints,
                        int[] yPoints,
                        ChartStyle style)

Description copied from interface: LineRenderer

Render lines using the supplied arrays of x and y pixel coordinates onto the supplied Graphics context.

Specified by:

renderLine in interface LineRenderer

Parameters:

g - the Graphics context

m - the ChartModel from which the points originated

xPoints - an array of x coordinates

yPoints - an array of y coordinates

style - the suggested style for rendering (a custom renderer may choose to ignore this)