com.day.cq.graphics.chart

Class PieChart

java.lang.Object

com.day.cq.graphics.chart.Chart

com.day.cq.graphics.chart.PieChart

public class PieChart
extends Chart

The PieChart class implements drawing a pie chart from data samples. From each data row only the first sample is taken to draw the pie. The slices are drawn counter clock wise, last row to first starting at the start angle as defined with setStart(double).

As a side effect the the ticksample data in the Y axis of the graph is set to the percentage of the sum of sample values. See draw(Graph, boolean) for more information.

Field Summary

Fields inherited from class com.day.cq.graphics.chart.Chart

chartTypes

Constructor Summary

Constructors

Constructor and Description
PieChart()

Method Summary

Modifier and Type	Method and Description
Layer	draw(Graph graph, boolean doDraw) Draws the pie chart into a new layer of the defined height and width.
static java.lang.String	getName()
void	setHeight(int height) Sets the height of the pie chart, if it has not been set yet.
void	setStart(double start) Sets the starting angle of the first pie piece, if it has not been set yet.
void	setWidth(int width) Sets the width of the pie chart, if it has not been set yet.

Methods inherited from class com.day.cq.graphics.chart.Chart

getInstance

Methods inherited from class java.lang.Object

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

Constructor Detail

PieChart

public PieChart()

Method Detail

getName

public static java.lang.String getName()

draw

public Layer draw(Graph graph,
                  boolean doDraw)

Draws the pie chart into a new layer of the defined height and width. As noted in the above class comment, this method sets the ticksample value of the graph's Y axis as the chart is drawn. This method can thus be used to simply calculate this data.

Specified by:

draw in class Chart

Parameters:

graph - The graph the chart belongs to

doDraw - Indicates whether to draw or only calculate

Returns:

The layer into which the pie chart has been drawn or null if no drawing has been requested.

setWidth

public void setWidth(int width)

Sets the width of the pie chart, if it has not been set yet.

Parameters:

width - The width of the pie chart.

setHeight

public void setHeight(int height)

Sets the height of the pie chart, if it has not been set yet.

Parameters:

height - The height of the pie chart.

setStart

public void setStart(double start)

Sets the starting angle of the first pie piece, if it has not been set yet. This angle is considered to be in degrees, to rotate counter clockwise for positive values. Zero degrees is at 3 o'clock.

Parameters:

start -