edu.umd.cs.piccolox.swing
Class PScrollPane.PScrollAction
java.lang.Object
javax.swing.AbstractAction
edu.umd.cs.piccolox.swing.PScrollPane.PScrollAction
- All Implemented Interfaces:
- java.awt.event.ActionListener, java.io.Serializable, java.lang.Cloneable, java.util.EventListener, javax.swing.Action
- Enclosing class:
- PScrollPane
protected static class PScrollPane.PScrollAction
- extends javax.swing.AbstractAction
Action to scroll left/right/up/down. Modified from
javax.swing.plaf.basic.BasicScrollPaneUI.ScrollAction.
Gets the view parameters (position and size) from the Viewport rather
than directly from the view - also only performs its actions when the
relevant scrollbar is visible.
- See Also:
- Serialized Form
Field Summary |
protected int |
direction
1 indicates scroll down, -1 up. |
protected int |
orientation
Direction to scroll. |
Fields inherited from class javax.swing.AbstractAction |
changeSupport, enabled |
Fields inherited from interface javax.swing.Action |
ACCELERATOR_KEY, ACTION_COMMAND_KEY, DEFAULT, DISPLAYED_MNEMONIC_INDEX_KEY, LARGE_ICON_KEY, LONG_DESCRIPTION, MNEMONIC_KEY, NAME, SELECTED_KEY, SHORT_DESCRIPTION, SMALL_ICON |
Constructor Summary |
protected |
PScrollPane.PScrollAction(java.lang.String name,
int orientation,
int direction,
boolean block)
Constructs a scroll action with the given name in the given
orientiation stated and in the direction provided. |
Method Summary |
void |
actionPerformed(java.awt.event.ActionEvent event)
Performs the scroll action if the action was performed on visible
scrollbars and if the viewport is valid. |
Methods inherited from class javax.swing.AbstractAction |
addPropertyChangeListener, clone, firePropertyChange, getKeys, getPropertyChangeListeners, getValue, isEnabled, putValue, removePropertyChangeListener, setEnabled |
Methods inherited from class java.lang.Object |
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
orientation
protected int orientation
- Direction to scroll.
direction
protected int direction
- 1 indicates scroll down, -1 up.
PScrollPane.PScrollAction
protected PScrollPane.PScrollAction(java.lang.String name,
int orientation,
int direction,
boolean block)
- Constructs a scroll action with the given name in the given
orientiation stated and in the direction provided.
- Parameters:
name
- arbitrary name of actionorientation
- horizontal or verticaldirection
- 1 indicates scroll down, -1 upblock
- true if block scroll as opposed to unit
actionPerformed
public void actionPerformed(java.awt.event.ActionEvent event)
- Performs the scroll action if the action was performed on visible
scrollbars and if the viewport is valid.
- Parameters:
event
- the event responsible for this action being performed
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