Package com.vaadin.client.ui.dd

Class DragAndDropHandler

java.lang.Object

com.vaadin.client.ui.dd.DragAndDropHandler

public class DragAndDropHandler
extends Object

A simple event handler for elements that can be drag and dropped. Properly handles drag start, cancel and end. For example, used in Grid column header reordering.

The showing of the dragged element, drag hints and reacting to drop/cancel is delegated to DragAndDropHandler.DragAndDropCallback implementation.

Since:

7.5.0

Author:

Vaadin Ltd

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	DragAndDropHandler.DragAndDropCallback	Callback interface for drag and drop.

Constructor Summary

Constructors

Constructor	Description
DragAndDropHandler()

Method Summary

Modifier and Type	Method	Description
void	onDragStartOnDraggableElement(com.google.gwt.dom.client.NativeEvent dragStartingEvent, DragAndDropHandler.DragAndDropCallback callback)	This method can be called to trigger drag and drop on any grid element that can be dragged and dropped.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DragAndDropHandler

public DragAndDropHandler()

Method Detail

onDragStartOnDraggableElement

public void onDragStartOnDraggableElement(com.google.gwt.dom.client.NativeEvent dragStartingEvent,
                                          DragAndDropHandler.DragAndDropCallback callback)

This method can be called to trigger drag and drop on any grid element that can be dragged and dropped.

Parameters:

dragStartingEvent - the drag triggering event, usually a Event.ONMOUSEDOWN or Event.ONTOUCHSTART event on the draggable element

callback - the callback that will handle actual drag and drop related operations