Package com._1c.g5.v8.dt.form.service.dnd

Class DragAndDropSelectionListener

java.lang.Object

com._1c.g5.v8.dt.form.service.dnd.DragAndDropSelectionListener

All Implemented Interfaces:

IDragAndDropListener

public abstract class DragAndDropSelectionListener
extends Object
implements IDragAndDropListener

Listener of drag-and-drop events when some IStructuredSelection is being dragged.

Constructor Summary

Constructors

Constructor	Description
DragAndDropSelectionListener(Form sourceForm, List<IDropDelegate> delegates)	Creates new listener instance.

Method Summary

Modifier and Type	Method	Description
protected IDropDelegate	findDropDelegate(Collection<TransferObject<?>> transferObjects, DropEvent event)	Returns drop delegate which supports the given selection.
protected Form	getSourceForm()	Returns source form.
FormElementTransfer	getTransfer()	Returns transfer object associated with this listener.
protected abstract Collection<TransferObject<?>>	getTransferObjectsToDrag(org.eclipse.swt.dnd.DragSourceEvent event)	Returns collection of the TransferObject to be dragged.
protected Collection<TransferObject<?>>	getTransferSelection()	Returns current transfer objects.
boolean	isTransferDataSupported(org.eclipse.swt.dnd.TransferData transferData)	Returns whether specified transfer data is supported by this listener.
void	onDragEnter(org.eclipse.swt.dnd.DropTargetEvent event)	Called when dragEnter event is being initiated.
void	onDragLeave(org.eclipse.swt.dnd.DropTargetEvent event)	Called when dragLeave event is being initiated.
void	onDragOver(org.eclipse.swt.dnd.DropTargetEvent event)	Called when dragOver event is being initiated.
void	onDragStart(org.eclipse.swt.dnd.DragSourceEvent event)	Called when dragStart event is being initiated.
void	onDrop(org.eclipse.swt.dnd.DropTargetEvent event)	Called when drop event is being initiated.
void	setSourceForm(Form form)

Methods inherited from class java.lang.Object

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

Constructor Detail

DragAndDropSelectionListener

public DragAndDropSelectionListener(Form sourceForm,
                                    List<IDropDelegate> delegates)

Creates new listener instance.

Parameters:

delegates - the drop delegates which will process the drop events

Method Detail

isTransferDataSupported

public boolean isTransferDataSupported(org.eclipse.swt.dnd.TransferData transferData)

Returns whether specified transfer data is supported by this listener.

Parameters:

transferData - transfer data to check

Returns:

true if transfer data is supported, false otherwise

getTransfer

public FormElementTransfer getTransfer()

Returns transfer object associated with this listener.

Returns:

transfer object

setSourceForm

public void setSourceForm(Form form)

onDragStart

public void onDragStart(org.eclipse.swt.dnd.DragSourceEvent event)

Description copied from interface: IDragAndDropListener

Called when dragStart event is being initiated.

Specified by:

onDragStart in interface IDragAndDropListener

Parameters:

event - the drag source event, cannot be null

onDragEnter

public void onDragEnter(org.eclipse.swt.dnd.DropTargetEvent event)

Description copied from interface: IDragAndDropListener

Called when dragEnter event is being initiated.

Specified by:

onDragEnter in interface IDragAndDropListener

Parameters:

event - the drop target event, cannot be null

onDragLeave

public void onDragLeave(org.eclipse.swt.dnd.DropTargetEvent event)

Description copied from interface: IDragAndDropListener

Called when dragLeave event is being initiated.

Specified by:

onDragLeave in interface IDragAndDropListener

Parameters:

event - the drop target event, cannot be null

onDragOver

public void onDragOver(org.eclipse.swt.dnd.DropTargetEvent event)

Description copied from interface: IDragAndDropListener

Called when dragOver event is being initiated.

Specified by:

onDragOver in interface IDragAndDropListener

Parameters:

event - the drop target event, cannot be null

onDrop

public void onDrop(org.eclipse.swt.dnd.DropTargetEvent event)

Description copied from interface: IDragAndDropListener

Called when drop event is being initiated.

Specified by:

onDrop in interface IDragAndDropListener

Parameters:

event - the drop target event, cannot be null

getTransferObjectsToDrag

protected abstract Collection<TransferObject<?>> getTransferObjectsToDrag(org.eclipse.swt.dnd.DragSourceEvent event)

Returns collection of the TransferObject to be dragged. Called when dragStart event is being initiated.

Parameters:

event - the drag source event

Returns:

collection of the TransferObject to be dragged or null if nothing to drag

findDropDelegate

protected IDropDelegate findDropDelegate(Collection<TransferObject<?>> transferObjects,
                                         DropEvent event)

Returns drop delegate which supports the given selection.

Parameters:

transferObjects - the TransferObject for which to find supported drop delegate

event - drop target event

Returns:

the drop delegate found or null

getTransferSelection

protected Collection<TransferObject<?>> getTransferSelection()

Returns current transfer objects.

Returns:

collection of the TransferObject

getSourceForm

protected Form getSourceForm()

Returns source form.

Returns:

source form