com.vaadin.ui.components.grid

Class TreeGridDropTarget<T>

java.lang.Object

com.vaadin.server.AbstractClientConnector

com.vaadin.server.AbstractExtension

com.vaadin.ui.dnd.DropTargetExtension<Grid<T>>

com.vaadin.ui.components.grid.GridDropTarget<T>

com.vaadin.ui.components.grid.TreeGridDropTarget<T>

Type Parameters:

T - Type of the TreeGrid bean.

All Implemented Interfaces:

MethodEventSource, ClientConnector, Extension, Connector, Serializable

public class TreeGridDropTarget<T>
extends GridDropTarget<T>

Makes the rows of a TreeGrid HTML5 drop targets. This is the server side counterpart of GridDropTargetExtensionConnector.

Since:

8.1

Author:

Vaadin Ltd

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.vaadin.server.ClientConnector

ClientConnector.AttachEvent, ClientConnector.AttachListener, ClientConnector.ConnectorErrorEvent, ClientConnector.DetachEvent, ClientConnector.DetachListener

Constructor Summary

Constructors

Constructor and Description
TreeGridDropTarget(TreeGrid<T> target, DropMode dropMode) Extends a TreeGrid and makes it's rows drop targets for HTML5 drag and drop.

Method Summary

Modifier and Type	Method and Description
Registration	addTreeGridDropListener(TreeGridDropListener<T> listener) Attaches drop listener for the current drop target.
TreeGrid<T>	getParent() Returns the component this extension is attached to.
protected TreeGridDropTargetState	getState() Returns the shared state for this connector.
protected TreeGridDropTargetState	getState(boolean markAsDirty) Returns the shared state for this connector.
protected void	registerDropTargetRpc() Registers the server side RPC methods invoked from client side on drop event.

Methods inherited from class com.vaadin.ui.components.grid.GridDropTarget

addGridDropListener, getDropMode, getDropThreshold, getGrid, isDropAllowedOnRowsWhenSorted, remove, setDropAllowedOnRowsWhenSorted, setDropMode, setDropThreshold

Methods inherited from class com.vaadin.ui.dnd.DropTargetExtension

addDropListener, attach, getDropCriteriaScript, getDropEffect, onDrop, setDropCriteria, setDropCriteriaScript, setDropCriterion, setDropCriterion, setDropCriterion, setDropEffect

Methods inherited from class com.vaadin.server.AbstractExtension

extend, getSupportedParentType, setParent

Methods inherited from class com.vaadin.server.AbstractClientConnector

addAttachListener, addDetachListener, addExtension, addListener, addListener, addListener, addMethodInvocationToQueue, beforeClientResponse, createState, detach, encodeState, equals, fireEvent, getAllChildrenIterable, getConnectorId, getErrorHandler, getExtensions, getListeners, getResource, getRpcManager, getRpcProxy, getSession, getStateType, getUI, handleConnectorRequest, hashCode, hasListeners, isAttached, isConnectorEnabled, isThis, markAsDirty, markAsDirtyRecursive, registerRpc, registerRpc, removeAttachListener, removeDetachListener, removeExtension, removeListener, removeListener, removeListener, removeListener, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setErrorHandler, setResource, updateDiffstate

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.vaadin.server.ClientConnector

addAttachListener, addDetachListener, beforeClientResponse, detach, encodeState, getErrorHandler, getExtensions, getRpcManager, getStateType, getUI, handleConnectorRequest, isAttached, isConnectorEnabled, markAsDirty, markAsDirtyRecursive, removeAttachListener, removeDetachListener, removeExtension, requestRepaint, requestRepaintAll, retrievePendingRpcCalls, setErrorHandler

Methods inherited from interface com.vaadin.shared.Connector

getConnectorId

Constructor Detail

TreeGridDropTarget

public TreeGridDropTarget(TreeGrid<T> target,
                          DropMode dropMode)

Extends a TreeGrid and makes it's rows drop targets for HTML5 drag and drop.

Parameters:

target - TreeGrid to be extended.

dropMode - Drop mode that describes the allowed drop locations within the TreeGrid's row.

Method Detail

addTreeGridDropListener

public Registration addTreeGridDropListener(TreeGridDropListener<T> listener)

Attaches drop listener for the current drop target. TreeGridDropListener.drop(TreeGridDropEvent) is called when drop event happens on the client side.

Parameters:

listener - Listener to handle drop event.

Returns:

Handle to be used to remove this listener.

registerDropTargetRpc

protected void registerDropTargetRpc()

Description copied from class: DropTargetExtension

Registers the server side RPC methods invoked from client side on drop event.

Override this method if you need to have a custom RPC interface for transmitting the drop event with more data. If just need to do additional things before firing the drop event, then you should override DropTargetExtension.onDrop(List, Map, DropEffect, MouseEventDetails) instead.

Overrides:

registerDropTargetRpc in class GridDropTarget<T>

getParent

public TreeGrid<T> getParent()

Description copied from class: DropTargetExtension

Returns the component this extension is attached to.

Specified by:

getParent in interface ClientConnector

Specified by:

getParent in interface Connector

Overrides:

getParent in class DropTargetExtension<Grid<T>>

Returns:

Extended component.

getState

protected TreeGridDropTargetState getState()

Description copied from class: AbstractClientConnector

Returns the shared state for this connector. The shared state object is shared between the server connector and the client connector. Changes are only communicated from the server to the client and not in the other direction.

As a side effect, marks the connector dirty so any changes done to the state will be sent to the client. Use getState(false) to avoid marking the connector as dirty.

Overrides:

getState in class GridDropTarget<T>

Returns:

The shared state for this connector. Never null.

getState

protected TreeGridDropTargetState getState(boolean markAsDirty)

Description copied from class: AbstractClientConnector

Returns the shared state for this connector.

Overrides:

getState in class GridDropTarget<T>

Parameters:

markAsDirty - true if the connector should automatically be marked dirty, false otherwise

Returns:

The shared state for this connector. Never null.

See Also:

AbstractClientConnector.getState()