DragGestureEvent
Class DragGestureEvent
- java.lang.Object
-
- java.util.EventObject
-
- java.awt.dnd.DragGestureEvent
- All Implemented Interfaces:
- Serializable
public class DragGestureEvent extends EventObject
A DragGestureEvent
is passed to DragGestureListener
's dragGestureRecognized() method when a particular DragGestureRecognizer
detects that a platform dependent drag initiating gesture has occurred on the Component
that it is tracking. The action
field of any DragGestureEvent
instance should take one of the following values:
-
DnDConstants.ACTION_COPY
-
DnDConstants.ACTION_MOVE
-
DnDConstants.ACTION_LINK
- See Also:
-
DragGestureRecognizer
,DragGestureListener
,DragSource
,DnDConstants
, Serialized Form
Fields
Fields inherited from class java.util.EventObject
source
Constructors
DragGestureEvent
public DragGestureEvent(DragGestureRecognizer dgr, int act, Point ori, List<? extends InputEvent> evs)
Constructs a DragGestureEvent
object given by the DragGestureRecognizer
instance firing this event, an act
parameter representing the user's preferred action, an ori
parameter indicating the origin of the drag, and a List
of events that comprise the gesture(evs
parameter).
- Parameters:
-
dgr
- TheDragGestureRecognizer
firing this event -
act
- The user's preferred action. For information on allowable values, see the class description forDragGestureEvent
-
ori
- The origin of the drag -
evs
- TheList
of events that comprise the gesture - Throws:
-
IllegalArgumentException
- if any parameter equalsnull
-
IllegalArgumentException
- if the act parameter does not comply with the values given in the class description forDragGestureEvent
- See Also:
DnDConstants
Methods
getSourceAsDragGestureRecognizer
public DragGestureRecognizer getSourceAsDragGestureRecognizer()
Returns the source as a DragGestureRecognizer
.
- Returns:
- the source as a
DragGestureRecognizer
getComponent
public Component getComponent()
Returns the Component
associated with this DragGestureEvent
.
- Returns:
- the Component
getDragSource
public DragSource getDragSource()
Returns the DragSource
.
- Returns:
- the
DragSource
getDragOrigin
public Point getDragOrigin()
Returns a Point
in the coordinates of the Component
over which the drag originated.
- Returns:
- the Point where the drag originated in Component coords.
iterator
public Iterator<InputEvent> iterator()
Returns an Iterator
for the events comprising the gesture.
- Returns:
- an Iterator for the events comprising the gesture
toArray
public Object[] toArray()
Returns an Object
array of the events comprising the drag gesture.
- Returns:
- an array of the events comprising the gesture
toArray
public Object[] toArray(Object[] array)
Returns an array of the events comprising the drag gesture.
- Parameters:
-
array
- the array ofEventObject
sub(types) - Returns:
- an array of the events comprising the gesture
getDragAction
public int getDragAction()
Returns an int
representing the action selected by the user.
- Returns:
- the action selected by the user
getTriggerEvent
public InputEvent getTriggerEvent()
Returns the initial event that triggered the gesture.
- Returns:
- the first "triggering" event in the sequence of the gesture
startDrag
public void startDrag(Cursor dragCursor, Transferable transferable) throws InvalidDnDOperationException
Starts the drag operation given the Cursor
for this drag operation and the Transferable
representing the source data for this drag operation.
If a null
Cursor
is specified no exception will be thrown and default drag cursors will be used instead.
If a null
Transferable
is specified NullPointerException
will be thrown.
- Parameters:
-
dragCursor
- The initialCursor
for this drag operation ornull
for the default cursor handling; see DragSourceContext for more details on the cursor handling mechanism during drag and drop -
transferable
- TheTransferable
representing the source data for this drag operation. - Throws:
-
InvalidDnDOperationException
- if the Drag and Drop system is unable to initiate a drag operation, or if the user attempts to start a drag while an existing drag operation is still executing. -
NullPointerException
- if theTransferable
isnull
- Since:
- 1.4
startDrag
public void startDrag(Cursor dragCursor, Transferable transferable, DragSourceListener dsl) throws InvalidDnDOperationException
Starts the drag given the initial Cursor
to display, the Transferable
object, and the DragSourceListener
to use.
- Parameters:
-
dragCursor
- The initialCursor
for this drag operation ornull
for the default cursor handling; see DragSourceContext for more details on the cursor handling mechanism during drag and drop -
transferable
- The source's Transferable -
dsl
- The source's DragSourceListener - Throws:
-
InvalidDnDOperationException
- if the Drag and Drop system is unable to initiate a drag operation, or if the user attempts to start a drag while an existing drag operation is still executing.
startDrag
public void startDrag(Cursor dragCursor, Image dragImage, Point imageOffset, Transferable transferable, DragSourceListener dsl) throws InvalidDnDOperationException
Start the drag given the initial Cursor
to display, a drag Image
, the offset of the Image
, the Transferable
object, and the DragSourceListener
to use.
- Parameters:
-
dragCursor
- The initialCursor
for this drag operation ornull
for the default cursor handling; see DragSourceContext for more details on the cursor handling mechanism during drag and drop -
dragImage
- The source's dragImage -
imageOffset
- The dragImage's offset -
transferable
- The source's Transferable -
dsl
- The source's DragSourceListener - Throws:
-
InvalidDnDOperationException
- if the Drag and Drop system is unable to initiate a drag operation, or if the user attempts to start a drag while an existing drag operation is still executing.
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