DropIndexCalculator (vaadin-all 8.28.1 API)

Type Parameters:

T - the bean type

All Superinterfaces:

Serializable

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface DropIndexCalculator<T>
extends Serializable
```
A handler for calculating the index of the dropped items on the drop target grid.

Since:

8.2

Author:

Vaadin Ltd

See Also:

GridRowDragger

Method Summary

All Methods Static Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`static <T> DropIndexCalculator<T>`	`alwaysDropToEnd()`	Returns a calculator for always dropping items to the end of the target grid, regardless of drop position.
`int`	`calculateDropIndex(GridDropEvent<T> event)`	Called when Items are dropped onto a target grid.

- Method Detail
  - alwaysDropToEnd
```
static <T> DropIndexCalculator<T> alwaysDropToEnd()
```
    Returns a calculator for always dropping items to the end of the target grid, regardless of drop position.
    
    Returns:
    
    the created drop index calculator
  - calculateDropIndex
```
int calculateDropIndex(GridDropEvent<T> event)
```
    Called when Items are dropped onto a target grid.
    
    Parameters:
    
    event - the GridDropEvent.
    
    Returns:
    
    index the target index, use Integer.MAX_VALUE for always dropping to end