In such situations it is desirable that the GUI control detect this and institute a scroll operation in order to make obscured region(s) visible to the user. This feature is known as autoscrolling.
If a GUI control is both an active DropTarget
and is also scrollable, it
can receive notifications of autoscrolling gestures by the user from
the DnD system by implementing this interface.
An autoscrolling gesture is initiated by the user by keeping the drag
cursor motionless with a border region of the Component
,
referred to as
the "autoscrolling region", for a predefined period of time, this will
result in repeated scroll requests to the Component
until the drag Cursor
resumes its motion.
- Since:
- 1.2
-
Method Summary
Modifier and TypeMethodDescriptionvoid
autoscroll
(Point cursorLocn) notify theComponent
to autoscrollThis method returns theInsets
describing the autoscrolling region or border relative to the geometry of the implementing Component.
-
Method Details
-
getAutoscrollInsets
Insets getAutoscrollInsets()This method returns theInsets
describing the autoscrolling region or border relative to the geometry of the implementing Component.This value is read once by the
DropTarget
upon entry of the dragCursor
into the associatedComponent
.- Returns:
- the Insets
-
autoscroll
notify theComponent
to autoscroll- Parameters:
cursorLocn
- APoint
indicating the location of the cursor that triggered this operation.
-