com.davisor.graphics.chart
Class PieFactory.PieMetrics

java.lang.Object
  com.davisor.graphics.chart.ChartFactory.ChartMetrics
      com.davisor.graphics.chart.PieFactory.PieMetrics

Enclosing class:

PieFactory

public class PieFactory.PieMetrics

extends ChartFactory.ChartMetrics

PieMetrics contains calculated values for size variables needed when drawing the pie.

Unlike typical metrics, pie metrics need to remember the context they we created with so that they can reread values from there if the metrics ever needs to be recalculated.

See Also:

PieFactory.PieMetrics

Field Summary

float	centerX Pie center.
float	centerY Pie center.
protected PieFactory.PieContext	context Reference to the context this metrics was created with.
java.awt.Font	font Value label font
float	offset Horizontal offset between slice and label
float	r radius
java.util.List	slices Pie slices with exact coordinates and render information.

Fields inherited from class com.davisor.graphics.chart.ChartFactory.ChartMetrics

M_height, M_width

Constructor Summary

PieFactory.PieMetrics(PieFactory.PieContext context)
Creates new pie metrics.

Method Summary

void	scale(float xFactor, float yFactor) Apply linear scaling to the image.
void	scaleToSize(java.lang.Number width, java.lang.Number height) Scales the metrics to make the chart meet given new size.

Methods inherited from class com.davisor.graphics.chart.ChartFactory.ChartMetrics

add, getHeight, getSize, getWidth, scale, setHeight, setSize, setWidth

Methods inherited from class java.lang.Object

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

Field Detail

context

protected PieFactory.PieContext context

Reference to the context this metrics was created with.

font

public java.awt.Font font

Value label font

centerX

public float centerX

Pie center.

centerY

public float centerY

Pie center.

r

public float r

radius

offset

public float offset

Horizontal offset between slice and label

slices

public java.util.List slices

Pie slices with exact coordinates and render information.

Constructor Detail

PieFactory.PieMetrics

public PieFactory.PieMetrics(PieFactory.PieContext context)

Creates new pie metrics.

Parameters:

context - the context this metrics was created with

Method Detail

scale

public void scale(float xFactor,
                  float yFactor)

Apply linear scaling to the image. Affects to all measurements.

Overrides:

scale in class ChartFactory.ChartMetrics

Parameters:

xFactor - horizontal scaling factor

yFactor - vertical scaling factor

scaleToSize

public void scaleToSize(java.lang.Number width,
                        java.lang.Number height)

Scales the metrics to make the chart meet given new size. The old width or height is kept if if a coresponding new value is not given.

Rescaling a pie is a troublesome operation, in particular because pie labels do not scale linearly. Instead, we have to recompute the entire metrics again agains the given new chart size constrains.

Overrides:

scaleToSize in class ChartFactory.ChartMetrics

Parameters:

width - new chart width (may be null = keep the old width)

height - new chart height (may be null = keep the old height)

See Also:

ChartFactory.ChartMetrics.getSize(int), PieFactory.createMetrics(PieFactory.PieContext,Number,Number)