JavaTM 2 Platform Std. Ed. v1.4.2
java.awt.dnd
Interface Autoscroll
- public interface Autoscroll
During DnD operations it is possible that a user may wish to drop the
subject of the operation on a region of a scrollable GUI control that is
not currently visible to the user.
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 |
void |
autoscroll(Point cursorLocn)
notify the Component to autoscroll
|
Insets |
getAutoscrollInsets()
This method returns the Insets describing
the autoscrolling region or border relative
to the geometry of the implementing Component. |
getAutoscrollInsets
public Insets getAutoscrollInsets()
- This method returns the
Insets 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 drag Cursor
into the associated Component .
- Returns:
- the Insets
autoscroll
public void autoscroll(Point cursorLocn)
- notify the
Component to autoscroll
- Parameters:
cursorLocn - A Point indicating the
location of the cursor that triggered this operation.
Copyright 2003 Sun Microsystems, Inc. All rights reserved
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