Package org.pepstock.charba.client.impl.callbacks

Class DataLabelsSelectionHandler

java.lang.Object

org.pepstock.charba.client.datalabels.events.AbstractEventHandler

org.pepstock.charba.client.impl.callbacks.DataLabelsPointerHandler

org.pepstock.charba.client.impl.callbacks.DataLabelsSelectionHandler

All Implemented Interfaces:

ClickEventHandler, EnterEventHandler, LeaveEventHandler

public final class DataLabelsSelectionHandler
extends DataLabelsPointerHandler

DataLabelsPlugin event callbacks to invoke data set selection handlers if there were defined.
This can substitute the event handling at chart level.

Author:

Andrea "Stock" Stocchero

Field Summary

Fields inherited from class org.pepstock.charba.client.impl.callbacks.DataLabelsPointerHandler

DEFAULT_CURSOR

Constructor Summary

Constructors

Constructor	Description
DataLabelsSelectionHandler()	Creates a callback setting CursorType.POINTER as pointer.
DataLabelsSelectionHandler(CursorType cursor)	Creates a callback setting the pointer cursor what is passed as argument.

Method Summary

Modifier and Type	Method	Description
void	addDatasetSelectionEventHandler(DatasetSelectionEventHandler handler)	Adds a data set selection handler instance to be invoke at click event.
boolean	onClick(DataLabelsContext context, ChartEventContext event)	Invoked to manage CLICK events on labels.
boolean	removeDatasetSelectionEventHandler(DatasetSelectionEventHandler handler)	Removes a data set selection handler instance.

Methods inherited from class org.pepstock.charba.client.impl.callbacks.DataLabelsPointerHandler

getCursor, onEnter, onLeave

Methods inherited from class java.lang.Object

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

Constructor Detail

DataLabelsSelectionHandler

public DataLabelsSelectionHandler()

Creates a callback setting CursorType.POINTER as pointer.

DataLabelsSelectionHandler

public DataLabelsSelectionHandler(CursorType cursor)

Creates a callback setting the pointer cursor what is passed as argument.

Parameters:

cursor - the cursor type to use. If null, uses CursorType.POINTER as pointer

Method Detail

addDatasetSelectionEventHandler

public void addDatasetSelectionEventHandler(DatasetSelectionEventHandler handler)

Adds a data set selection handler instance to be invoke at click event.

Parameters:

handler - data set selection handler instance to be invoke at click event

removeDatasetSelectionEventHandler

public boolean removeDatasetSelectionEventHandler(DatasetSelectionEventHandler handler)

Removes a data set selection handler instance.

Parameters:

handler - data set selection handler instance

Returns:

true if the handler has been removed, otherwise false

onClick

public boolean onClick(DataLabelsContext context,
                       ChartEventContext event)

Description copied from interface: ClickEventHandler

Invoked to manage CLICK events on labels.

Specified by:

onClick in interface ClickEventHandler

Overrides:

onClick in class AbstractEventHandler

Parameters:

context - DataLabelsPlugin.ID plugin context instance

event - event instance

Returns:

If the callback explicitly returns true, the label is updated with the new context and the chart re-rendered.