Class VDragAndDropWrapper.CustomDropHandler

Constructor Detail

• CustomDropHandler

  public CustomDropHandler()

Method Detail

• dragEnter

  public void dragEnter​(VDragEvent drag)

  Description copied from class: VAbstractDropHandler

  The default implementation in VAbstractDropHandler checks if the Transferable is accepted.

  If transferable is accepted (either via server visit or client side rules) the default implementation calls abstract VAbstractDropHandler.dragAccepted(VDragEvent) method.

  If drop handler has distinct places where some parts may accept the Transferable and others don't, one should use similar validation logic in dragOver method and replace this method with empty implementation.

  Specified by:

  dragEnter in interface VDropHandler

  Overrides:

  dragEnter in class VAbstractDropHandler

  Parameters:

  drag - DragEvent which contains the transferable and other information for the operation

• dragLeave

  public void dragLeave​(VDragEvent drag)

  Description copied from class: VAbstractDropHandler

  Default implementation does nothing. Implementors should clean possible emphasis or drag icons here.

  Specified by:

  dragLeave in interface VDropHandler

  Overrides:

  dragLeave in class VAbstractDropHandler

  Parameters:

  drag - DragEvent which contains the transferable and other information for the operation

• dragOver

  public void dragOver​(VDragEvent drag)

  Description copied from class: VAbstractDropHandler

  Default implementation does nothing.

  Specified by:

  dragOver in interface VDropHandler

  Overrides:

  dragOver in class VAbstractDropHandler

• drop

  public boolean drop​(VDragEvent drag)

  Description copied from class: VAbstractDropHandler

  The default implemmentation visits server if AcceptCriterion can't be verified on client or if AcceptCriterion are met on client.

  Specified by:

  drop in interface VDropHandler

  Overrides:

  drop in class VAbstractDropHandler

  Returns:

  true if the Tranferrable of this drag event needs to be sent to the server, false if drop is rejected or no server side event should be sent

• dragAccepted

  protected void dragAccepted​(VDragEvent drag)

  Description copied from class: VAbstractDropHandler

  This method is called when a valid drop location was found with AcceptCriterion either via client or server side check.

  Implementations can set some hints for users here to highlight that the drag is on a valid drop location.

  Specified by:

  dragAccepted in class VAbstractDropHandler

• getConnector

  public ComponentConnector getConnector()

  Description copied from class: VAbstractDropHandler

  Returns the Paintable who owns this VAbstractDropHandler. Server side counterpart of the Paintable is expected to implement DropTarget interface.

  Specified by:

  getConnector in interface VDropHandler

  Specified by:

  getConnector in class VAbstractDropHandler

• getApplicationConnection

  public ApplicationConnection getApplicationConnection()

  Description copied from interface: VDropHandler

  Returns the application connection to which this VDropHandler belongs to. DragAndDropManager uses this fucction to send Transferable to server side.