org.pepstock.charba.client.data

Class DatasetCanvasObjectFactory

java.lang.Object

org.pepstock.charba.client.colors.CanvasObjectFactory

org.pepstock.charba.client.data.DatasetCanvasObjectFactory

public final class DatasetCanvasObjectFactory
extends CanvasObjectFactory

Utility class which creates a canvas gradient and pattern java script objects using a Charba gradient or pattern.
A Charba gradient or pattern describes how a GWT canvas gradient or pattern must be created.

Author:

Andrea "Stock" Stocchero

See Also:

Gradient, Pattern, CanvasGradient, CanvasPattern

Method Summary

Modifier and Type	Method and Description
static DatasetCanvasObjectFactory	get() Singleton method to get instance.
protected Area	getArea(IsChart chart, Gradient gradient) Returns an area object used to define the area of LINEAR gradient.
protected Center	getCenter(IsChart chart, Gradient gradient, int datasetIndex, int index) Returns the coordinates of a center of arc for RADIAL gradient.
protected Radius	getRadius(IsChart chart, Gradient gradient, int datasetIndex, int index) Returns the inner and outer radius of arc for RADIAL gradient.

Methods inherited from class org.pepstock.charba.client.colors.CanvasObjectFactory

clear, createGradient, createPattern, resetGradients

Methods inherited from class java.lang.Object

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

Method Detail

get

public static DatasetCanvasObjectFactory get()

Singleton method to get instance.

Returns:

signleton instance

getArea

protected Area getArea(IsChart chart,
                       Gradient gradient)

Description copied from class: CanvasObjectFactory

Returns an area object used to define the area of LINEAR gradient.

Specified by:

getArea in class CanvasObjectFactory

Parameters:

chart - chart instance

gradient - gradient instance

Returns:

an area object used to define the area of LINEAR gradient

getCenter

protected Center getCenter(IsChart chart,
                           Gradient gradient,
                           int datasetIndex,
                           int index)

Description copied from class: CanvasObjectFactory

Returns the coordinates of a center of arc for RADIAL gradient.

Specified by:

getCenter in class CanvasObjectFactory

Parameters:

chart - chart instance

gradient - gradient instance

datasetIndex - dataset index

index - data index

Returns:

the coordinates of a center of arc

getRadius

protected Radius getRadius(IsChart chart,
                           Gradient gradient,
                           int datasetIndex,
                           int index)

Description copied from class: CanvasObjectFactory

Returns the inner and outer radius of arc for RADIAL gradient.

Specified by:

getRadius in class CanvasObjectFactory

Parameters:

chart - chart instance

gradient - gradient instance

datasetIndex - dataset index

index - data index

Returns:

the inner and outer radius of arc