Escalator.AriaGridHelper (vaadin-all 8.28.1 API)

java.lang.Object
- com.vaadin.client.widgets.Escalator.AriaGridHelper

Enclosing class:

Escalator
```
public class Escalator.AriaGridHelper
extends Object
```
Helper class that helps to implement the WAI-ARIA functionality for the Grid and TreeGrid component.
The following WAI-ARIA attributes are added through this class:
- aria-rowcount (since 8.2)
- roles provided by Escalator.AriaGridRole (since 8.2)
Since:

8.2

Constructor Summary

Constructors
Constructor Description

AriaGridHelper()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addRows(int numberOfRows)`	Adds the given numberOfRows to allRows and calls `updateAriaRowCount()`.
`void`	`removeRows(int numberOfRows)`	Removes the given numberOfRows from allRows and calls `updateAriaRowCount()`.
`void`	`updateAriaRowCount()`	Sets the aria-rowcount attribute with the current value of `allRows` if the grid is attached and `allRows` > 0.
`void`	`updateRole(com.google.gwt.dom.client.Element element, Escalator.AriaGridRole role)`	Sets the `role` attribute to the given element.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - AriaGridHelper
```
public AriaGridHelper()
```
- Method Detail
  - addRows
```
public void addRows(int numberOfRows)
```
    Adds the given numberOfRows to allRows and calls updateAriaRowCount().
    
    Parameters:
    
    numberOfRows - number of rows that were added to the grid
    
    Since:
    
    8.2
  - removeRows
```
public void removeRows(int numberOfRows)
```
    Removes the given numberOfRows from allRows and calls updateAriaRowCount().
    
    Parameters:
    
    numberOfRows - number of rows that were removed from the grid
    
    Since:
    
    8.2
  - updateAriaRowCount
```
public void updateAriaRowCount()
```
    Sets the aria-rowcount attribute with the current value of allRows if the grid is attached and allRows > 0.
    
    Since:
    
    8.2
  - updateRole
```
public void updateRole(com.google.gwt.dom.client.Element element,
                       Escalator.AriaGridRole role)
```
    Sets the role attribute to the given element.
    
    Parameters:
    
    element - element that should get the role attribute
    
    role - role to be added
    
    Since:
    
    8.2