Class PieChart

java.lang.Object

com.codename1.charts.views.AbstractChart

com.codename1.charts.views.RoundChart

com.codename1.charts.views.PieChart

public class PieChart
extends RoundChart

Shows each value from a CategorySeries as a slice of a circle.

Combine this chart with a DefaultRenderer to control colours, labels and gradients. The resulting PieChart can be embedded in a form via a com.codename1.charts.ChartComponent.

Field Summary

Fields inherited from class RoundChart

autoCalculateCenter, mCenterX, mCenterY, mDataset, mRenderer, NO_VALUE, SHAPE_WIDTH

Modifier and Type	Field	Description
protected boolean	autoCalculateCenter
protected int	mCenterX	The chart center X axis.
protected int	mCenterY	The chart center y axis.
protected CategorySeries	mDataset	The series dataset.
protected DefaultRenderer	mRenderer	The series renderer.
protected static final int	NO_VALUE	A no value constant.
protected static final int	SHAPE_WIDTH	The legend shape width.

Constructor Summary

Constructors

Constructor	Description
PieChart(CategorySeries dataset, DefaultRenderer renderer)	Builds a new pie chart instance.

Method Summary

Modifier and Type	Method	Description
void	draw(Canvas canvas, int x, int y, int width, int height, Paint paint)	The graphical representation of the pie chart.
Shape	getSegmentShape(int pointIndex)	Gets the shape of a pie segment given its point index.
SeriesSelection	getSeriesAndPointForScreenCoordinate(Point screenPoint)	Given screen coordinates, returns the series and point indexes of a chart element.

Methods inherited from class RoundChart

drawLegendShape, drawTitle, getCenterX, getCenterY, getLegendShapeWidth, getRenderer, isAutocalculateCenter, setAutocalculateCenter, setCenterX, setCenterY

Modifier and Type	Method	Description
void	drawLegendShape(Canvas canvas, SimpleSeriesRenderer renderer, float x, float y, int seriesIndex, Paint paint)	The graphical representation of the legend shape.
void	drawTitle(Canvas canvas, int x, int y, int width, Paint paint)	The graphical representation of the round chart title.
int	getCenterX()	Returns the center on X axis.
int	getCenterY()	Returns the center on Y axis.
int	getLegendShapeWidth(int seriesIndex)	Returns the legend shape width.
DefaultRenderer	getRenderer()	Returns the renderer.
boolean	isAutocalculateCenter()
void	setAutocalculateCenter(boolean a)
void	setCenterX(int centerX)	Sets a new center on X axis.
void	setCenterY(int centerY)	Sets a new center on Y axis.

Methods inherited from class AbstractChart

calculateDrawPoints, drawBackground, drawLabel, drawLegend, drawPath, drawPath, drawString, getExceed, getLabel, getLegendSize, isNullValue, isVertical

Modifier and Type	Method	Description
protected static float[]	calculateDrawPoints(float p1x, float p1y, float p2x, float p2y, int screenHeight, int screenWidth)
protected void	drawBackground(DefaultRenderer renderer, Canvas canvas, int x, int y, int width, int height, Paint paint, boolean newColor, int color)	Draws the chart background.
protected void	drawLabel(Canvas canvas, String labelText, DefaultRenderer renderer, List<Rectangle2D> prevLabelsBounds, int centerX, int centerY, float shortRadius, float longRadius, float currentAngle, float angle, int left, int right, int color, Paint paint, boolean line, boolean display)	Draws a text label.
protected int	drawLegend(Canvas canvas, DefaultRenderer renderer, String[] titles, int left, int right, int y, int width, int height, int legendSize, Paint paint, boolean calculate)	Draws the chart legend.
protected void	drawPath(Canvas canvas, float[] points, Paint paint, boolean circular)	The graphical representation of a path.
protected void	drawPath(Canvas canvas, List<Float> points, Paint paint, boolean circular)	The graphical representation of a path.
protected void	drawString(Canvas canvas, String text, float x, float y, Paint paint)	Draw a multiple lines string.
protected boolean	getExceed(float currentWidth, DefaultRenderer renderer, int right, int width)	Calculates if the current width exceeds the total width.
protected String	getLabel(NumberFormat format, double label)	Makes sure the fraction digit is not displayed, if not needed.
protected int	getLegendSize(DefaultRenderer renderer, int defaultHeight, float extraHeight)	Calculates the current legend size.
boolean	isNullValue(double value)
boolean	isVertical(DefaultRenderer renderer)	Checks if the current chart is rendered as vertical.

Methods inherited from class Object

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

Modifier and Type	Method	Description
protected Object	clone()
boolean	equals(Object obj)	Indicates whether some other object is "equal to" this one.
final Class	getClass()	Returns the runtime class of an object.
int	hashCode()	Returns a hash code value for the object.
final void	notify()	Wakes up a single thread that is waiting on this object's monitor.
final void	notifyAll()	Wakes up all threads that are waiting on this object's monitor.
String	toString()	Returns a string representation of the object.
final void	wait()	Causes current thread to wait until another thread invokes the method or the method for this object.
final void	wait(long timeout)	Causes current thread to wait until either another thread invokes the method or the method for this object, or a specified amount of time has elapsed.
final void	wait(long timeout, int nanos)	Causes current thread to wait until another thread invokes the method or the method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.

Constructor Details

PieChart

public PieChart(CategorySeries dataset,
 DefaultRenderer renderer)

Builds a new pie chart instance.

Parameters

• dataset: the series dataset

• renderer: the series renderer

Method Details

draw

public void draw(Canvas canvas,
 int x,
 int y,
 int width,
 int height,
 Paint paint)

The graphical representation of the pie chart.

Parameters

• canvas: the canvas to paint to

• x: the top left x value of the view to draw to

• y: the top left y value of the view to draw to

• width: the width of the view to draw to

• height: the height of the view to draw to

• paint: the paint

Specified by:

draw in class AbstractChart

getSeriesAndPointForScreenCoordinate

public SeriesSelection getSeriesAndPointForScreenCoordinate(Point screenPoint)

Description copied from class: AbstractChart

Given screen coordinates, returns the series and point indexes of a chart element. If there is no chart element (line, point, bar, etc) at those coordinates, null is returned.

Parameters

• screenPoint

Returns

the series and point indexes

Overrides:

getSeriesAndPointForScreenCoordinate in class AbstractChart

getSegmentShape

public Shape getSegmentShape(int pointIndex)

Gets the shape of a pie segment given its point index.

Parameters

• pointIndex: The point index representing the pie segment.

Returns

A shape of the outline of the segment.