Swing/WaitCursor のバックアップの現在との差分(No.12)

Cursorを砂時計に変更

サンプルコード

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* サンプルコード [#sourcecode]
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#code(link){{
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frame.setGlassPane(new LockingGlassPane());
frame.getGlassPane().setVisible(false);
button.addActionListener(new ActionListener() {
  @Override public void actionPerformed(ActionEvent e) {
    frame.getGlassPane().setVisible(true);
    button.setEnabled(false);
    new SwingWorker() {
      @Override public Object doInBackground() {
        dummyLongTask();
        doSomeLongTask();
        return "Done";
      }
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      @Override public void done() {
        frame.getGlassPane().setVisible(false);
        button.setEnabled(true);
      }
  }.execute();
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}
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    }.execute();
  }
});
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// ...
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class LockingGlassPane extends JComponent {
  public LockingGlassPane() {
    setOpaque(false);
    setFocusTraversalPolicy(new DefaultFocusTraversalPolicy() {
      @Override public boolean accept(Component c) {return false;}
      @Override public boolean accept(Component c) {
        return false;
      }
    });
    addKeyListener(new KeyAdapter() {});
    addMouseListener(new MouseAdapter() {});
    requestFocusInWindow();
    setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
  }
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  @Override public void setVisible(boolean flag) {
    super.setVisible(flag);
    setFocusTraversalPolicyProvider(flag);
  }
}

• どのコンポーネントにもフォーカス移動できないFocusTraversalPolicyを設定する Tabキーなどによるフォーカス移動を禁止する場合は、GlassPaneに以下のような設定を行います。

• どのコンポーネントにもフォーカス移動できないFocusTraversalPolicyを設定する

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import java.awt.*;
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import java.awt.event.*;
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import java.beans.PropertyChangeEvent;
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import javax.swing.*;
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import javax.swing.plaf.LayerUI;
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public class DisableInputLayerUITest {
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  public JComponent makeUI() {
    final JPanel p = new JPanel();
    final DisableInputLayerUI layerUI = new DisableInputLayerUI();
    final JLayer<JPanel> jlayer = new JLayer<JPanel>(p, layerUI);
    final Timer stopper = new Timer(4000, new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        layerUI.stop();
      }
    });
    p.add(new JCheckBox());
    p.add(new JTextField(10));
    p.add(new JButton(new AbstractAction("button") {
      public void actionPerformed(ActionEvent e) {
        layerUI.start();
        if (!stopper.isRunning()) {
          stopper.start();
        }
      }
    }));
    stopper.setRepeats(false);
    return jlayer;
  }
  public static void main(String[] args) {
    EventQueue.invokeLater(new Runnable() {
      @Override public void run() { createAndShowGUI(); }
    });
  }
  public static void createAndShowGUI() {
    JComponent c = new DisableInputLayerUITest().makeUI();
    JFrame f = new JFrame();
    f.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    f.getContentPane().add(c, BorderLayout.NORTH);
    f.getContentPane().add(new JScrollPane(new JTextArea()));
    f.setSize(320, 240);
    f.setLocationRelativeTo(null);
    f.setVisible(true);
  }
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}
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- `JDK 1.7.0`の場合、`JLayer`を使用して特定のコンポーネントだけ入力不可、かつカーソルを砂時計に変更するなどの設定が可能になった
-- [[JLayerで指定したコンポーネントへの入力を禁止>Swing/DisableInputLayer]] に移動

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class DisableInputLayerUI extends LayerUI<JPanel> {
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  private boolean isRunning = false;
  @Override public void paint(Graphics g, JComponent c) {
    super.paint(g, c);
    if(!isRunning) return;
    Graphics2D g2 = (Graphics2D) g.create();
    g2.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, .5f));
    g2.setPaint(Color.GRAY);
    g2.fillRect(0, 0, c.getWidth(), c.getHeight());
    g2.dispose();
  }
  @Override public void installUI(JComponent c) {
    super.installUI(c);
    JLayer jlayer = (JLayer)c;
    jlayer.getGlassPane().setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
    jlayer.setLayerEventMask(
      AWTEvent.MOUSE_EVENT_MASK |
      AWTEvent.MOUSE_MOTION_EVENT_MASK |
      AWTEvent.KEY_EVENT_MASK);
  }
  @Override public void uninstallUI(JComponent c) {
    JLayer jlayer = (JLayer)c;
    jlayer.setLayerEventMask(0);
    super.uninstallUI(c);
  }
  @Override public void eventDispatched(AWTEvent e, JLayer l) {
    if(isRunning && e instanceof InputEvent) {
        ((InputEvent)e).consume();
    }
  }
  private static final String CMD_REPAINT = "repaint";
  public void start() {
    if (isRunning) return;
    isRunning = true;
    firePropertyChange(CMD_REPAINT,false,true);
  }
  public void stop() {
    isRunning = false;
    firePropertyChange(CMD_REPAINT,true,false);
  }
  @Override public void applyPropertyChange(PropertyChangeEvent pce, JLayer l) {
    String cmd = pce.getPropertyName();
    if(CMD_REPAINT.equals(cmd)) {
      l.getGlassPane().setVisible((Boolean)pce.getNewValue());
      l.repaint();
    }
  }
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}
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