Class DoughnutChart

java.lang.Object

com.codename1.charts.views.AbstractChart

com.codename1.charts.views.RoundChart

com.codename1.charts.views.DoughnutChart

public class DoughnutChart
extends RoundChart

Visualises a MultipleCategorySeries as concentric rings that share a common centre (also known as a doughnut chart).

Each category in the dataset is drawn as a separate ring, making it suitable for representing hierarchical proportions. Construct the chart with the dataset and a DefaultRenderer and wrap it in a com.codename1.charts.ChartComponent to place it on screen.

Field Summary

Fields inherited from class RoundChart

autoCalculateCenter, mCenterX, mCenterY, mRenderer, NO_VALUE, SHAPE_WIDTH

Constructor Summary

Constructors

Constructor	Description
DoughnutChart(MultipleCategorySeries dataset, DefaultRenderer renderer)	Builds a new doughnut 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 doughnut chart.
void	drawLegendShape(Canvas canvas, SimpleSeriesRenderer renderer, float x, float y, int seriesIndex, Paint paint)	The graphical representation of the legend shape.
int	getLegendShapeWidth(int seriesIndex)	Returns the legend shape width.

Methods inherited from class RoundChart

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

Methods inherited from class AbstractChart

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

Methods inherited from class Object

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

Constructor Details

DoughnutChart

public DoughnutChart(MultipleCategorySeries dataset,
 DefaultRenderer renderer)

Builds a new doughnut 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 doughnut 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

getLegendShapeWidth

public int getLegendShapeWidth(int seriesIndex)

Returns the legend shape width.

Parameters

• seriesIndex: the series index

Returns

the legend shape width

Overrides:

getLegendShapeWidth in class RoundChart

drawLegendShape

public void drawLegendShape(Canvas canvas,
 SimpleSeriesRenderer renderer,
 float x,
 float y,
 int seriesIndex,
 Paint paint)

The graphical representation of the legend shape.

Parameters

• canvas: the canvas to paint to

• renderer: the series renderer

• x: the x value of the point the shape should be drawn at

• y: the y value of the point the shape should be drawn at

• seriesIndex: the series index

• paint: the paint to be used for drawing

Overrides:

drawLegendShape in class RoundChart