employeeeventhandler.java

Java程序设计技巧与开发实例附书源代码。

import javax.swing.event.*;
import java.awt.event.*;

public class EmployeeEventHandler
    extends WindowAdapter
    implements ActionListener, ListSelectionListener {
  private EmployeeLists master;

  public EmployeeEventHandler(EmployeeLists _master) {
    master = _master;
  }

  private void hire() {
    if (!master.name.getText().equals("")) {
      master.peopleData.addElement(master.name.getText());
      master.name.setText("");
      master.name.requestFocus();
    }
  }

  private void fire() {
    int indices[] = master.toFireList.getSelectedIndices();
    if (indices.length > 0) {
      for (int i = indices.length - 1; i >= 0; i--) {
        master.toFireData.remove(indices[i]);
      }
    }
  }

  private void restore() {
    int indices[] = master.toFireList.getSelectedIndices();
    if (indices.length > 0) {
      for (int i = indices.length - 1; i >= 0; i--) {
        master.peopleData.addElement(
            master.toFireData.get(indices[i]));
        master.toFireData.remove(indices[i]);
      }
    }
  }

  public void actionPerformed(ActionEvent ae) {
    if ( (ae.getSource() == master.hire) ||
        (ae.getSource() == master.name)) {
      hire();
    }
    else if (ae.getSource() == master.fire) {
      fire();
    }
    else if (ae.getSource() == master.restore) {
      restore();
    }
  }

  public void valueChanged(ListSelectionEvent lse) {
    if (!lse.getValueIsAdjusting()) {
      master.toFireData.addElement(
          master.peopleList.getSelectedValue());
      master.peopleData.remove(master.peopleList.getSelectedIndex());
      master.toFireList.ensureIndexIsVisible(
          master.toFireData.getSize() - 1);
      master.toFireList.setSelectedIndex(
          master.toFireData.getSize() - 1);
    }
  }

  public void windowClosing(WindowEvent we) {
    System.exit(0);
  }
}