AssistiveExamplepublic class AssistiveExample extends JPanel implements ActionListener, GUIInitializedListener, MouseMotionListener
| Fields Summary |
|---|
| Timer | timer | | static JFrame | frame | | JLabel | nameLabel | | JLabel | descriptionLabel | | JCheckBox | selectionCheckBox | | JCheckBox | textCheckBox | | JCheckBox | valueCheckBox | | JCheckBox | componentCheckBox | | JCheckBox | actionCheckBox | | JCheckBox | hypertextCheckBox | | JButton | performAction |
| Constructors Summary |
|---|
public AssistiveExample()
frame = new JFrame("Assistive Example");
// Create and insert the appropriate labels and check boxes
nameLabel = new JLabel();
descriptionLabel = new JLabel();
selectionCheckBox = new JCheckBox("Selection", false);
textCheckBox = new JCheckBox("Text", false);
valueCheckBox = new JCheckBox("Value", false);
componentCheckBox = new JCheckBox("Component", false);
actionCheckBox = new JCheckBox("Action", false);
hypertextCheckBox = new JCheckBox("Hyperlink", false);
performAction = new JButton("Perform Action");
setLayout(new GridLayout(10,1));
add(nameLabel);
add(descriptionLabel);
add(new JSeparator());
add(selectionCheckBox);
add(textCheckBox);
add(valueCheckBox);
add(componentCheckBox);
add(hypertextCheckBox);
add(actionCheckBox);
add(performAction);
setBorder(new TitledBorder("Accessible Component"));
performAction.addActionListener(this);
frame.getContentPane().add("Center", this);
frame.pack();
frame.show();
// Check to see if the GUI subsystem is initialized
// correctly. (This is only needed in JDK 1.2). If it
// isn't, then we have to wait.
if (EventQueueMonitor.isGUIInitialized()) {
createGUI();
} else {
EventQueueMonitor.addGUIInitializedListener(this);
}
performAction.grabFocus();
|
| Methods Summary |
|---|
| public void | actionPerformed(java.awt.event.ActionEvent e)
// Find the component currently under the mouse.
Point currentPosition = EventQueueMonitor.getCurrentMousePosition();
Accessible comp = EventQueueMonitor.getAccessibleAt(currentPosition);
// If the user pressed the button, and the component
// has an accessible action, then execute it.
if (e.getActionCommand() == "Perform Action") {
AccessibleContext context = comp.getAccessibleContext();
AccessibleAction action = context.getAccessibleAction();
if (action != null)
action.doAccessibleAction(0);
else
System.out.println("No accessible action present!");
return;
}
// Otherwise, the timer has fired. Stop it and update the window.
timer.stop();
updateWindow(comp);
| | public void | createGUI()
// We want to track the mouse motions, so notify the
// Swing event monitor of this.
SwingEventMonitor.addMouseMotionListener(this);
// Start a Timer object to measure how long the mouse stays
// over a particular area.
timer = new Timer(500, this);
| | public void | guiInitialized()
createGUI();
| | public void | mouseDragged(java.awt.event.MouseEvent e)
// If the mouse is dragged, restart the timer.
timer.restart();
| | public void | mouseMoved(java.awt.event.MouseEvent e)
// If the mouse moves, restart the timer.
timer.restart();
| | private void | updateWindow(javax.accessibility.Accessible component)
// Reset the check boxes
actionCheckBox.setSelected(false);
selectionCheckBox.setSelected(false);
textCheckBox.setSelected(false);
componentCheckBox.setSelected(false);
valueCheckBox.setSelected(false);
hypertextCheckBox.setSelected(false);
// Get the accessibile context of the component in question
AccessibleContext context = component.getAccessibleContext();
nameLabel.setText("Name: " + context.getAccessibleName());
descriptionLabel.setText("Desc: " +
context.getAccessibleDescription());
// Check the context for each of the accessibility types
if (context.getAccessibleAction() != null)
actionCheckBox.setSelected(true);
if (context.getAccessibleSelection() != null)
selectionCheckBox.setSelected(true);
if (context.getAccessibleText() != null) {
textCheckBox.setSelected(true);
if (context.getAccessibleText() instanceof AccessibleHypertext)
hypertextCheckBox.setSelected(true);
}
if (context.getAccessibleComponent() != null)
componentCheckBox.setSelected(true);
if (context.getAccessibleValue() != null)
valueCheckBox.setSelected(true);
repaint();
|
|
