EnterEventHandler (Charba - J2CL and GWT charts library based on CHART.JS)

All Known Implementing Classes:

AbstractEventHandler, DataLabelsPointerHandler, DataLabelsSelectionHandler
```
public interface EnterEventHandler
```
Callback interface of DataLabelsPlugin.ID plugin to manage ENTER events on labels.
Charba events need to be enabled in order to get the associated label event working.
If the callback explicitly returns true, the label is updated with the new context and the chart re-rendered. This allows to implement visual interactions with labels such as highlight, selection, etc.

Author:

Andrea "Stock" Stocchero

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`onEnter(DataLabelsContext context, ChartEventContext event)`	Invoked to manage ENTER events on labels.

- Method Detail
  - onEnter
```
boolean onEnter(DataLabelsContext context,
                ChartEventContext event)
```
    Invoked to manage ENTER events on labels.
    
    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.