KeyStroke Sample : Various Event Listener « Event « Java






  1. Java
  2. Event
  3. Various Event Listener

KeyStroke Sample

KeyStroke Sample
  
import java.awt.Container;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;

import javax.swing.AbstractAction;
import javax.swing.Action;
import javax.swing.ActionMap;
import javax.swing.InputMap;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;

public class KeyStrokeSample {
  private static final String ACTION_KEY = "theAction";

  public static void main(String args[]) {
    JFrame frame = new JFrame("KeyStroke Sample");

    JButton buttonA = new JButton("<html><center>FOCUSED<br>control alt 7");
    JButton buttonB = new JButton("<html><center>FOCUS/RELEASE<br>VK_ENTER");
    JButton buttonC = new JButton(
        "<html><center>ANCESTOR<br>VK_F4+SHIFT_MASK");
    JButton buttonD = new JButton("<html><center>WINDOW<br>' '");

    // Define ActionListener
    Action actionListener = new AbstractAction() {
      public void actionPerformed(ActionEvent actionEvent) {
        JButton source = (JButton) actionEvent.getSource();
        System.out.println("Activated: " + source.getText());
      }
    };

    KeyStroke controlAlt7 = KeyStroke.getKeyStroke("control alt 7");
    InputMap inputMap = buttonA.getInputMap();
    inputMap.put(controlAlt7, ACTION_KEY);
    ActionMap actionMap = buttonA.getActionMap();
    actionMap.put(ACTION_KEY, actionListener);

    KeyStroke enter = KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0, true);
    inputMap = buttonB.getInputMap();
    inputMap.put(enter, ACTION_KEY);
    buttonB.setActionMap(actionMap);

    KeyStroke shiftF4 = KeyStroke.getKeyStroke(KeyEvent.VK_F4,InputEvent.SHIFT_MASK);
    inputMap = buttonC.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
    inputMap.put(shiftF4, ACTION_KEY);
    buttonC.setActionMap(actionMap);

    KeyStroke space = KeyStroke.getKeyStroke(' ');
    inputMap = buttonD.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
    inputMap.put(space, ACTION_KEY);
    buttonD.setActionMap(actionMap);

    Container contentPane = frame.getContentPane();
    contentPane.setLayout(new GridLayout(2, 2));
    contentPane.add(buttonA);
    contentPane.add(buttonB);
    contentPane.add(buttonC);
    contentPane.add(buttonD);

    frame.setSize(400, 200);
    frame.setVisible(true);
  }
}








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