Class DragGestureEvent
java.lang.Object
java.util.EventObject
java.awt.dnd.DragGestureEvent
- All Implemented Interfaces:
Serializable
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:
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Field Summary
Fields inherited from class java.util.EventObject
source
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Constructor Summary
ConstructorDescriptionDragGestureEvent
(DragGestureRecognizer dgr, int act, Point ori, List<? extends InputEvent> evs) Constructs aDragGestureEvent
object given by theDragGestureRecognizer
instance firing this event, anact
parameter representing the user's preferred action, anori
parameter indicating the origin of the drag, and aList
of events that comprise the gesture(evs
parameter). -
Method Summary
Modifier and TypeMethodDescriptionReturns theComponent
associated with thisDragGestureEvent
.int
Returns anint
representing the action selected by the user.Returns aPoint
in the coordinates of theComponent
over which the drag originated.Returns theDragSource
.Returns the source as aDragGestureRecognizer
.Returns the initial event that triggered the gesture.iterator()
Returns anIterator
for the events comprising the gesture.void
startDrag
(Cursor dragCursor, Transferable transferable) Starts the drag operation given theCursor
for this drag operation and theTransferable
representing the source data for this drag operation.void
startDrag
(Cursor dragCursor, Transferable transferable, DragSourceListener dsl) Starts the drag given the initialCursor
to display, theTransferable
object, and theDragSourceListener
to use.void
startDrag
(Cursor dragCursor, Image dragImage, Point imageOffset, Transferable transferable, DragSourceListener dsl) Start the drag given the initialCursor
to display, a dragImage
, the offset of theImage
, theTransferable
object, and theDragSourceListener
to use.Object[]
toArray()
Returns anObject
array of the events comprising the drag gesture.Object[]
Returns an array of the events comprising the drag gesture.Methods inherited from class java.util.EventObject
getSource, toString
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Constructor Details
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DragGestureEvent
public DragGestureEvent(DragGestureRecognizer dgr, int act, Point ori, List<? extends InputEvent> evs) Constructs aDragGestureEvent
object given by theDragGestureRecognizer
instance firing this event, anact
parameter representing the user's preferred action, anori
parameter indicating the origin of the drag, and aList
of events that comprise the gesture(evs
parameter).- Parameters:
dgr
- TheDragGestureRecognizer
firing this eventact
- The user's preferred action. For information on allowable values, see the class description forDragGestureEvent
ori
- The origin of the dragevs
- 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:
-
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Method Details
-
getSourceAsDragGestureRecognizer
Returns the source as aDragGestureRecognizer
.- Returns:
- the source as a
DragGestureRecognizer
-
getComponent
Returns theComponent
associated with thisDragGestureEvent
.- Returns:
- the Component
-
getDragSource
-
getDragOrigin
Returns aPoint
in the coordinates of theComponent
over which the drag originated.- Returns:
- the Point where the drag originated in Component coords.
-
iterator
Returns anIterator
for the events comprising the gesture.- Returns:
- an Iterator for the events comprising the gesture
-
toArray
Returns anObject
array of the events comprising the drag gesture.- Returns:
- an array of the events comprising the gesture
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toArray
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getDragAction
public int getDragAction()Returns anint
representing the action selected by the user.- Returns:
- the action selected by the user
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getTriggerEvent
Returns the initial event that triggered the gesture.- Returns:
- the first "triggering" event in the sequence of the gesture
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startDrag
public void startDrag(Cursor dragCursor, Transferable transferable) throws InvalidDnDOperationException Starts the drag operation given theCursor
for this drag operation and theTransferable
representing the source data for this drag operation.
If anull Cursor
is specified no exception will be thrown and default drag cursors will be used instead.
If anull Transferable
is specifiedNullPointerException
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 droptransferable
- 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
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startDrag
public void startDrag(Cursor dragCursor, Transferable transferable, DragSourceListener dsl) throws InvalidDnDOperationException Starts the drag given the initialCursor
to display, theTransferable
object, and theDragSourceListener
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 droptransferable
- The source's Transferabledsl
- 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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startDrag
public void startDrag(Cursor dragCursor, Image dragImage, Point imageOffset, Transferable transferable, DragSourceListener dsl) throws InvalidDnDOperationException Start the drag given the initialCursor
to display, a dragImage
, the offset of theImage
, theTransferable
object, and theDragSourceListener
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 dropdragImage
- The source's dragImageimageOffset
- The dragImage's offsettransferable
- The source's Transferabledsl
- 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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