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oracle.jbo
Class ScrollEvent

java.lang.Object
java.util.EventObject
oracle.jbo.JboEvent
oracle.jbo.RangeEvent
oracle.jbo.ScrollEvent

All Implemented Interfaces:

java.io.Serializable

public class ScrollEvent

extends RangeEvent

Generated by RowSetIterator to inform its listeners when a range of rows is scrolled.

Since:

JDeveloper 3.0

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

ScrollEvent(RowSetIterator source, int rangeStartBefore)
Creates a scroll event.

Method Summary

int	getFirstNewRowRangeIndex() Gets the index of the new first row of the range.
int	getNewRowCountInRange() Counts the number of rows exposed by the scroll.
int	getRangeStartBefore() Gets the index of the original first row of the range.
int	getScrollAmount() Gets the distance rows are displaced by the scroll.
java.lang.String	toString() Internal: For debugging only.

Methods inherited from class oracle.jbo.RangeEvent

getAllRowsInRange, getRangeStart, getRowCountInRange, toString

Methods inherited from class java.util.EventObject

getSource

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

ScrollEvent

public ScrollEvent(RowSetIterator source,
                   int rangeStartBefore)

Creates a scroll event.

Parameters:

source - the publisher of the event.

rangeStartBefore - the View Object index of the first row of the range, before scrolling.

Method Detail

getRangeStartBefore

public int getRangeStartBefore()

Gets the index of the original first row of the range.

Returns:

the View Object index of the first row of the range, before scrolling.

getScrollAmount

public int getScrollAmount()

Gets the distance rows are displaced by the scroll.

Returns:

the displacement as a number of rows. A negative value indicates scroll-up, and positive value scroll-down.

getFirstNewRowRangeIndex

public int getFirstNewRowRangeIndex()

Gets the index of the new first row of the range.

Returns:

the View Object index of the first row of the range, after scrolling.

getNewRowCountInRange

public int getNewRowCountInRange()

Counts the number of rows exposed by the scroll. Rows that were previously in the range are not counted.

Returns:

then number of newly visible rows.

toString

public java.lang.String toString()

Internal: For debugging only.

Overrides:

toString in class java.util.EventObject

Returns:

a diagnostic string.

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