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

java.lang.Object
- org.pepstock.charba.client.impl.callbacks.AtLeastOneDatasetHandler

All Implemented Interfaces:

ChartEventHandler, EventHandler, LegendClickEventHandler
```
public class AtLeastOneDatasetHandler
extends Object
implements LegendClickEventHandler
```
Implementation of legend click handler which disable the capability to hide the last visible dataset.
In this way, always a dataset is showed.

Author:

Andrea "Stock" Stocchero

- Constructor Summary
  
  Constructors
  Constructor Description
  
  AtLeastOneDatasetHandler()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  void onClick(LegendClickEvent event)
  Invoked when the user clicks on the chart legend.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AtLeastOneDatasetHandler
```
public AtLeastOneDatasetHandler()
```
- Method Detail
  - onClick
```
public void onClick(LegendClickEvent event)
```
    Description copied from interface: LegendClickEventHandler
    
    Invoked when the user clicks on the chart legend.
    
    Specified by:
    
    onClick in interface LegendClickEventHandler
    
    Parameters:
    
    event - legend click event