Interface Autoscroll
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public interface AutoscrollDuring 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
DropTargetand 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 theComponentuntil the dragCursorresumes its motion.- Since:
- 1.2
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method and Description voidautoscroll(Point cursorLocn)notify theComponentto autoscrollInsetsgetAutoscrollInsets()This method returns theInsetsdescribing the autoscrolling region or border relative to the geometry of the implementing Component.
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Method Detail
getAutoscrollInsets
Insets getAutoscrollInsets()
This method returns theInsetsdescribing the autoscrolling region or border relative to the geometry of the implementing Component.This value is read once by the
DropTargetupon entry of the dragCursorinto the associatedComponent.- Returns:
- the Insets
autoscroll
void autoscroll(Point cursorLocn)
notify theComponentto autoscroll- Parameters:
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cursorLocn- APointindicating the location of the cursor that triggered this operation.
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