Class CubicLineChart

java.lang.Object

com.codename1.charts.views.AbstractChart

com.codename1.charts.views.XYChart

com.codename1.charts.views.LineChart

com.codename1.charts.views.CubicLineChart

public class CubicLineChart
extends LineChart

Draws smooth curves through XY series values using cubic interpolation.

Use this chart when you want to emphasise the trend between points rather than the raw straight-line segments of LineChart. Supply the XYMultipleSeriesDataset and XYMultipleSeriesRenderer as usual and pass an optional smoothness factor to control how tightly the curve follows the provided data points.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	TYPE	The chart type.

Fields inherited from class XYChart

mDataset, mRenderer

Constructor Summary

Constructors

Constructor	Description
CubicLineChart()
CubicLineChart(XYMultipleSeriesDataset dataset, XYMultipleSeriesRenderer renderer, float smoothness)	Builds a cubic line chart.

Method Summary

Modifier and Type	Method	Description
protected void	drawPath(Canvas canvas, List<Float> points, Paint paint, boolean circular)	The graphical representation of a path.
protected void	drawPoints(Canvas canvas, Paint paint, List<Float> pointsList, XYSeriesRenderer seriesRenderer, float yAxisValue, int seriesIndex, int startIndex)	Draws the series points.
String	getChartType()	Returns the chart type identifier.

Methods inherited from class LineChart

clickableAreasForPoints, drawLegendShape, drawSeries, getLegendShapeWidth, getPointsChart, isRenderPoints, setDatasetRenderer

Methods inherited from class XYChart

draw, drawChartValuesText, drawSeries, drawText, drawXLabels, drawXTextLabels, drawYLabels, getCalcRange, getDataset, getDefaultMinimum, getRenderer, getScreenR, getSeriesAndPointForScreenCoordinate, getXLabels, getYLabels, isRenderNullValues, setCalcRange, setScreenR, toRealPoint, toRealPoint, toScreenPoint, toScreenPoint

Methods inherited from class AbstractChart

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

Methods inherited from class Object

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

Field Details

TYPE

public static final String TYPE

The chart type.

See Also:

• Constant Field Values

Constructor Details

CubicLineChart

public CubicLineChart()

CubicLineChart

public CubicLineChart(XYMultipleSeriesDataset dataset,
 XYMultipleSeriesRenderer renderer,
 float smoothness)

Builds a cubic line chart.

Parameters

• dataset: the dataset

• renderer: the renderer

• smoothness: @param smoothness smoothness determines how smooth the curve should be, range [0->0.5] super smooth, 0.5, means that it might not get close to control points if you have random data // less smooth, (close to 0) means that it will most likely touch all control // points

Method Details

drawPath

protected void drawPath(Canvas canvas,
 List<Float> points,
 Paint paint,
 boolean circular)

Description copied from class: AbstractChart

The graphical representation of a path.

Parameters

• canvas: the canvas to paint to

• points: the points that are contained in the path to paint

• paint: the paint to be used for painting

• circular: if the path ends with the start point

Overrides:

drawPath in class AbstractChart

drawPoints

protected void drawPoints(Canvas canvas,
 Paint paint,
 List<Float> pointsList,
 XYSeriesRenderer seriesRenderer,
 float yAxisValue,
 int seriesIndex,
 int startIndex)

Draws the series points.

Parameters

• canvas: the canvas

• paint: the paint object

• pointsList: the points to be rendered

• seriesRenderer: the series renderer

• yAxisValue: the y axis value in pixels

• seriesIndex: the series index

• startIndex: the start index of the rendering points

Overrides:

drawPoints in class XYChart

getChartType

public String getChartType()

Returns the chart type identifier.

Returns

the chart type

Overrides:

getChartType in class LineChart