KeymapExample.javaAPI DocExample3058Thu Oct 24 20:14:26 BST 2002None


public class KeymapExample extends Object

Fields Summary
Constructors Summary
Methods Summary
public static voidmain(java.lang.String[] args)

    // start with a simple JTextArea, get its Keymap to use as our parent,
    // and create a new map called "KeymapExampleMap"
    JTextArea area = new JTextArea(6, 32);
    Keymap parent = area.getKeymap();
    Keymap newmap = JTextComponent.addKeymap("KeymapExampleMap", parent);

    // add CTRL-U: change current word to upper case (our own action)
    KeyStroke u = KeyStroke.getKeyStroke(KeyEvent.VK_U, InputEvent.CTRL_MASK);
    Action actionU = new UpWord(); // an inner class (defined below)
    newmap.addActionForKeyStroke(u, actionU);

    // get all the actions JTextArea provides for us
    Action actionList[] = area.getActions();
    // put them in a Hashtable so we can retreive them by Action.NAME
    Hashtable lookup = new Hashtable();
    for (int j=0; j < actionList.length; j+=1)
      lookup.put(actionList[j].getValue(Action.NAME), actionList[j]);

    // add CTRL-L: select current line (action provided for us)
    KeyStroke L = KeyStroke.getKeyStroke(KeyEvent.VK_L, InputEvent.CTRL_MASK);
    Action actionL = (Action)lookup.get(DefaultEditorKit.selectLineAction);
    newmap.addActionForKeyStroke(L, actionL);

    // add CTRL-W: select current word (action provided for us)
    KeyStroke W = KeyStroke.getKeyStroke(KeyEvent.VK_W, InputEvent.CTRL_MASK);
    Action actionW = (Action)lookup.get(DefaultEditorKit.selectWordAction);
    newmap.addActionForKeyStroke(W, actionW);

    // set the JTextArea's Keymap to be our new map

    // show the TextPane
    JFrame f = new JFrame("KeymapExample");
    f.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);
    area.setText("This is the story\nof the hare who\nlost his spectacles.");