DragAndDropHandler.DragAndDropCallback (vaadin-client 8.28-SNAPSHOT API)

Enclosing class:

DragAndDropHandler
```
public static interface DragAndDropHandler.DragAndDropCallback
```
Callback interface for drag and drop.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onDragCancel()`	Called when the drag has been canceled.
`void`	`onDragEnd()`	Called after the has ended on a drop or cancel.
`boolean`	`onDragStart(com.google.gwt.user.client.Event e)`	Called when the drag has started.
`void`	`onDragUpdate(com.google.gwt.user.client.Event e)`	Called on drag.
`void`	`onDrop()`	Called when the drag has ended on a drop.

- Method Detail
  - onDragStart
```
boolean onDragStart(com.google.gwt.user.client.Event e)
```
    Called when the drag has started. The drag can be canceled by returning false.
    
    Parameters:
    
    e - the original event that started the drag
    
    Returns:
    
    true if the drag is OK to start, false to cancel
  - onDragUpdate
```
void onDragUpdate(com.google.gwt.user.client.Event e)
```
    Called on drag.
    
    Parameters:
    
    e - the event related to the drag
  - onDragEnd
```
void onDragEnd()
```
    Called after the has ended on a drop or cancel.
  - onDrop
```
void onDrop()
```
    Called when the drag has ended on a drop.
  - onDragCancel
```
void onDragCancel()
```
    Called when the drag has been canceled.