!!! Listings zum Artikel "Schoener wohnen"
!!! von Thomas Kuenneth in iX 11/09, S. 140

!!! Listing 1: SubstanceDemo.java

package com.thomaskuenneth.articles.ix;

// diverse import-Statements

public class SubstanceDemo extends JFrame {

  private JTextField textfield;
  private JCheckBox checkbox;

  public SubstanceDemo() {
    super("Substance-Demo");
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JPasswordField password = new JPasswordField(10);
    password.putClientProperty(LafWidget.PASSWORD_STRENGTH_CHECKER,
        new PasswordStrengthChecker() {
          public PasswordStrength getStrength(char[] password) {
            if (password == null)
              return PasswordStrength.WEAK;
            int length = password.length;
            if (length < 3)
              return PasswordStrength.WEAK;
            if (length < 6)
              return PasswordStrength.MEDIUM;
            return PasswordStrength.STRONG;
          }

          public String getDescription(PasswordStrength strength) {
            if (strength == PasswordStrength.WEAK)
              return "Das Passwort ist zu schwach.";
            if (strength == PasswordStrength.MEDIUM)
              return "Das Passwort ist akzeptabel.";
            if (strength == PasswordStrength.STRONG)
              return "Das Passwort ist gut.";
            return null;
          }
        });
    textfield = new JTextField("Hallo, iX", 10);
    textfield.putClientProperty(LafWidget.TEXT_EDIT_CONTEXT_MENU,
        Boolean.TRUE);
    textfield.putClientProperty(LafWidget.TEXT_SELECT_ON_FOCUS,
        Boolean.TRUE);
    checkbox = new JCheckBox("editierbar");
    checkbox.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        updateTextfield();
      }
    });
    updateTextfield();
    JPanel p = new JPanel(new FlowLayout(FlowLayout.LEADING, 10, 10));
    p.add(password);
    p.add(checkbox);
    p.add(textfield);
    setContentPane(p);
    pack();
  }

  private void updateTextfield() {
    boolean selected = checkbox.isSelected();
    textfield.setEditable(selected);
    if (selected) {
      textfield.requestFocus();
    }
  }

  public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        JFrame.setDefaultLookAndFeelDecorated(true);
        try {
          UIManager
              .setLookAndFeel("org.jvnet.substance.skin.SubstanceBusinessBlackSteelLookAndFeel");
        } catch (Throwable thr) {
          thr.printStackTrace();
        }
        UIManager.put(SubstanceLookAndFeel.SHOW_EXTRA_WIDGETS,
            Boolean.TRUE);
        new SubstanceDemo().setVisible(true);
      }
    });
  }
}

!!! Listing 2: Erweitertes main()

public static void main(String[] args) {
  SwingUtilities.invokeLater(new Runnable() {
    public void run() {
      LAFAdapter.startWidget();
      new LAFWidgetDemo().setVisible(true);
    }
  });
}

!!! Listing 3: DemoWidget.java

package com.thomaskuenneth.articles.ix;

// diverse import-Statements

public class DemoWidget extends LafWidgetAdapter<JTextComponent> implements
    KeyListener {

  protected JTextComponent textComp;

  public boolean requiresCustomLafSupport() {
    return false;
  }

  @Override
  public void setComponent(JTextComponent jcomp) {
    super.setComponent(jcomp);
    this.textComp = jcomp;
  }

  @Override
  public void installListeners() {
    textComp.addKeyListener(this);
    textComp.setOpaque(true);
  }

  @Override
  public void uninstallListeners() {
    textComp.removeKeyListener(this);
  }

  public void keyPressed(KeyEvent e) {
  }

  public void keyReleased(KeyEvent e) {
  }

  public void keyTyped(KeyEvent e) {
    Toolkit.getDefaultToolkit().beep();
  }
}

!!! Listing 4: Erweitertes AbstractLayerUI

private JXLayer<JTextField> createTextfield() {
  JTextField textfield = new JTextField(20);
  return new JXLayer<JTextField>(textfield,
      new AbstractLayerUI<JTextField>() {

        @Override
        protected void processMouseEvent(MouseEvent e,
            JXLayer<? extends JTextField> l) {
          JTextComponent c = l.getView();
          if ((c != null) && e.isPopupTrigger()) {
            c.requestFocus(true);
            JPopupMenu editMenu = new JPopupMenu();
            editMenu.add(new CutAction());
            editMenu.add(new CopyAction());
            editMenu.add(new PasteAction());
            Point pt = SwingUtilities.convertPoint(e
                .getComponent(), e.getPoint(), c);
            editMenu.show(c, pt.x, pt.y);
            e.consume();
          }
        }
      });
}

!!! Listing 5: CopyAction

private class CopyAction extends AbstractAction {

  private final JTextComponent c;

  public CopyAction() {
    super("Kopieren");
    c = textfield.getView();
  }

  public void actionPerformed(ActionEvent e) {
    c.copy();
  }

  @Override
  public boolean isEnabled() {
    return c.isEnabled() && (c.getSelectedText() != null);
  }
}

!!! Listing 6: Anonyme innere Klasse für Listing 4

@Override
protected void paintLayer(Graphics2D g2,
    JXLayer<? extends JTextField> l) {
  super.paintLayer(g2, l);
  String text = l.getView().getText().toLowerCase();
  Color col = g2.getColor();
  if ("rot".equals(text)) {
    g2.setColor(Color.red);
  } else if ("gelb".equals(text)) {
    g2.setColor(Color.yellow);
  } else if ("grün".equals(text)) {
    g2.setColor(Color.green);
  }
  g2.setComposite(AlphaComposite.getInstance(
      AlphaComposite.SRC_OVER, .3f));
  g2.fillRect(0, 0, l.getWidth(), l.getHeight());
  g2.setColor(col);
}