be.lassi.ui.util
Class ScrollHelper
java.lang.Object
be.lassi.ui.util.ScrollHelper
- All Implemented Interfaces:
- java.lang.Runnable, java.util.EventListener, javax.swing.event.ChangeListener
public class ScrollHelper
- extends java.lang.Object
- implements javax.swing.event.ChangeListener, java.lang.Runnable
Helps to keep the vertical scrolling position of the row header
view port and the main view port of a JScrollPane in sync.
In principle it should not have been necessary to implement
this class, but it overcomes a problem with vertical scrolling
position of the two views becoming out of sync when using the
arrow up and down buttons to scroll through the cells. Perhaps
in a future release of Swing, this class should be removed again.
|
Constructor Summary |
ScrollHelper(javax.swing.JScrollPane scrollPane)
Constructs a new helper. |
|
Method Summary |
void |
dispose()
Cleans up after use. |
void |
run()
Implements the Runable interface to adjust the
vertical scrolling position of the main viewport, if it is
different from the vertical position of the row header
viewport. |
void |
stateChanged(javax.swing.event.ChangeEvent e)
Implements the ChangeListener interface to monitor the
vertical scrolling position. |
| Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
ScrollHelper
public ScrollHelper(javax.swing.JScrollPane scrollPane)
- Constructs a new helper.
- Parameters:
scrollPane - the scroll pane for which vertical scrolling position
is monitored, and adjustments are made when necessary
dispose
public void dispose()
- Cleans up after use.
run
public void run()
- Implements the
Runable interface to adjust the
vertical scrolling position of the main viewport, if it is
different from the vertical position of the row header
viewport.
- Specified by:
run in interface java.lang.Runnable
stateChanged
public void stateChanged(javax.swing.event.ChangeEvent e)
- Implements the
ChangeListener interface to monitor the
vertical scrolling position.
- Specified by:
stateChanged in interface javax.swing.event.ChangeListener
