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javax.swing
protected class: JScrollPane.AccessibleJScrollPane [javadoc | source]

java.lang.Object
   AccessibleJComponent
      javax.swing.JScrollPane$AccessibleJScrollPane

All Implemented Interfaces:
    PropertyChangeListener, ChangeListener

This class implements accessibility support for the JScrollPane class. It provides an implementation of the Java Accessibility API appropriate to scroll pane user-interface elements.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeans^TM has been added to the java.beans package. Please see java.beans.XMLEncoder .

Field Summary
protected  JViewport	viewPort

Constructor:
public AccessibleJScrollPane() { super(); resetViewPort(); // initialize the AccessibleRelationSets for the JScrollPane // and JScrollBar(s) JScrollBar scrollBar = getHorizontalScrollBar(); if (scrollBar != null) { setScrollBarRelations(scrollBar); } scrollBar = getVerticalScrollBar(); if (scrollBar != null) { setScrollBarRelations(scrollBar); } } AccessibleJScrollPane constructor

Method from javax.swing.JScrollPane$AccessibleJScrollPane Summary:
getAccessibleRole,   propertyChange,   resetViewPort,   setScrollBarRelations,   stateChanged

Methods from java.lang.Object:
clone,   equals,   finalize,   getClass,   hashCode,   notify,   notifyAll,   toString,   wait,   wait,   wait

Method from javax.swing.JScrollPane$AccessibleJScrollPane Detail:
public AccessibleRole getAccessibleRole() { return AccessibleRole.SCROLL_PANE; } Get the role of this object.
public void propertyChange(PropertyChangeEvent e) { String propertyName = e.getPropertyName(); if (propertyName == "horizontalScrollBar" || propertyName == "verticalScrollBar") { if (e.getNewValue() instanceof JScrollBar) { setScrollBarRelations((JScrollBar)e.getNewValue()); } } } This method gets called when a bound property is changed.
public void resetViewPort() { /* * Resets the viewport ChangeListener and PropertyChangeListener */ if (viewPort != null) { viewPort.removeChangeListener(this); viewPort.removePropertyChangeListener(this); } viewPort = JScrollPane.this.getViewport(); if (viewPort != null) { viewPort.addChangeListener(this); viewPort.addPropertyChangeListener(this); } }
void setScrollBarRelations(JScrollBar scrollBar) { /* * The JScrollBar is a CONTROLLER_FOR the JScrollPane. * The JScrollPane is CONTROLLED_BY the JScrollBar. */ AccessibleRelation controlledBy = new AccessibleRelation(AccessibleRelation.CONTROLLED_BY, scrollBar); AccessibleRelation controllerFor = new AccessibleRelation(AccessibleRelation.CONTROLLER_FOR, JScrollPane.this); // set the relation set for the scroll bar AccessibleContext ac = scrollBar.getAccessibleContext(); ac.getAccessibleRelationSet().add(controllerFor); // set the relation set for the scroll pane getAccessibleRelationSet().add(controlledBy); }
public void stateChanged(ChangeEvent e) { if (e == null) { throw new NullPointerException(); } firePropertyChange(ACCESSIBLE_VISIBLE_DATA_PROPERTY, Boolean.valueOf(false), Boolean.valueOf(true)); } Invoked when the target of the listener has changed its state.