Java Swing Tips

2011/02/28

Highlight entire JTree row on selection

Code

class RowSelectionTree extends JTree {
  private static final Color SELC = new Color(100, 150, 200);
  private Handler handler;

  @Override protected void paintComponent(Graphics g) {
    g.setColor(getBackground());
    g.fillRect(0, 0, getWidth(), getHeight());
    if (getSelectionCount() > 0) {
      g.setColor(SELC);
      for (int i : getSelectionRows()) {
        Rectangle r = getRowBounds(i);
        g.fillRect(0, r.y, getWidth(), r.height);
      }
    }
    super.paintComponent(g);
    if (getLeadSelectionPath() != null) {
      Rectangle r = getRowBounds(getRowForPath(getLeadSelectionPath()));
      g.setColor(hasFocus() ? SELC.darker() : SELC);
      g.drawRect(0, r.y, getWidth() - 1, r.height - 1);
    }
  }

  @Override public void updateUI() {
    removeFocusListener(handler);
    super.updateUI();
    setUI(new BasicTreeUI() {
      @Override public Rectangle getPathBounds(JTree tree, TreePath path) {
        if (tree != null && treeState != null) {
          return getPathBounds(path, tree.getInsets(), new Rectangle());
        }
        return null;
      }

      private Rectangle getPathBounds(
          TreePath path, Insets insets, Rectangle bounds) {
        Rectangle rect = treeState.getBounds(path, bounds);
        if (rect != null) {
          rect.width = tree.getWidth();
          rect.y += insets.top;
        }
        return rect;
      }
    });
    handler = new Handler();
    addFocusListener(handler);
    setCellRenderer(handler);
    setOpaque(false);
  }

  static class Handler extends DefaultTreeCellRenderer implements FocusListener {
    @Override public Component getTreeCellRendererComponent(
        JTree tree, Object value, boolean selected, boolean expanded,
        boolean leaf, int row, boolean hasFocus) {
      JLabel l = (JLabel) super.getTreeCellRendererComponent(
          tree, value, selected, expanded, leaf, row, hasFocus);
      l.setBackground(selected ? SELC : tree.getBackground());
      l.setOpaque(true);
      return l;
    }

    @Override public void focusGained(FocusEvent e) {
      e.getComponent().repaint();
    }

    @Override public void focusLost(FocusEvent e) {
      e.getComponent().repaint();
    }
  }
}

References

TreeRowSelection(Japanese)

2011/02/03

Translucent JInternalFrame (Nimbus)

Code

JPanel p1 = new JPanel();
p1.setOpaque(false);

JPanel p2 = new JPanel() {
  @Override protected void paintComponent(Graphics g) {
    // super.paintComponent(g);
    g.setColor(new Color(100, 50, 50, 100));
    g.fillRect(0, 0, getWidth(), getHeight());
  }
};

JPanel p3 = new JPanel() {
  @Override protected void paintComponent(Graphics g) {
    Graphics2D g2 = (Graphics2D) g;
    // g2.setPaint(new Color(100, 120, 100, 100));
    g2.setPaint(texture);
    g2.fillRect(0, 0, getWidth(), getHeight());
  }
};

protected JInternalFrame createFrame(JPanel panel) {
  MyInternalFrame frame = new MyInternalFrame();
  if (panel != null) {
    frame.setContentPane(panel);
    // JButton button = new JButton("button");
    // button.setOpaque(false);
    panel.add(new JLabel("label"));
    panel.add(new JButton("button"));
  }
  desktop.add(frame);
  frame.setOpaque(false);
  frame.setVisible(true);
  // ...

References

2011/01/20

JTable RowHeader

Code

class RowHeaderList<E> extends JList<E> {
  private final JTable table;
  private final ListSelectionModel tableSelection;
  private final ListSelectionModel rListSelection;
  private int rollOverRowIndex = -1;
  private int pressedRowIndex  = -1;

  public RowHeaderList(ListModel<E> model, JTable table) {
    super(model);
    this.table = table;
    setFixedCellHeight(table.getRowHeight());
    setCellRenderer(new RowHeaderRenderer<E>(table.getTableHeader()));
    RollOverListener rol = new RollOverListener();
    addMouseListener(rol);
    addMouseMotionListener(rol);

    tableSelection = table.getSelectionModel();
    rListSelection = getSelectionModel();
  }

  class RowHeaderRenderer<E> extends JLabel
                             implements ListCellRenderer<E> {
    private final JTableHeader header; // = table.getTableHeader();
    public RowHeaderRenderer(JTableHeader header) {
      super();
      this.header = header;
      this.setOpaque(true);
      // this.setBorder(UIManager.getBorder("TableHeader.cellBorder"));
      this.setBorder(BorderFactory.createMatteBorder(
          0, 0, 1, 2, Color.GRAY.brighter()));
      this.setHorizontalAlignment(CENTER);
      this.setForeground(header.getForeground());
      this.setBackground(header.getBackground());
      this.setFont(header.getFont());
    }

    @Override public Component getListCellRendererComponent(
        JList<? extends E> list, E value, int index,
        boolean isSelected, boolean cellHasFocus) {
      if (index == pressedRowIndex) {
        setBackground(Color.GRAY);
      } else if (index == rollOverRowIndex) {
        setBackground(Color.WHITE);
      } else if (isSelected) {
        setBackground(Color.GRAY.brighter());
      } else {
        setForeground(header.getForeground());
        setBackground(header.getBackground());
      }
      setText(Objects.toString(value, ""));
      return this;
    }
  }
  // ...
}

References

JTable RowHeader(Japanese)

2010/11/30

JTable CellEditor PopupMenu

Code

public static JPopupMenu installTextComponentPopupMenu(final JTextComponent tc) {
  final UndoManager manager = new UndoManager();
  final Action undoAction   = new UndoAction(manager);
  final Action redoAction   = new RedoAction(manager);
  final Action cutAction    = new DefaultEditorKit.CutAction();
  final Action copyAction   = new DefaultEditorKit.CopyAction();
  final Action pasteAction  = new DefaultEditorKit.PasteAction();
  final Action deleteAction = new AbstractAction("delete") {
    public void actionPerformed(ActionEvent e) {
      JPopupMenu pop = (JPopupMenu)e.getSource();
      ((JTextComponent)pop.getInvoker()).replaceSelection(null);
    }
  };
  tc.addAncestorListener(new AncestorListener() {
    public void ancestorAdded(AncestorEvent e) {
      manager.discardAllEdits();
      tc.requestFocusInWindow();
    }
    public void ancestorMoved(AncestorEvent e) {}
    public void ancestorRemoved(AncestorEvent e) {}
  });
  tc.getDocument().addUndoableEditListener(manager);
  tc.getActionMap().put("undo", undoAction);
  tc.getActionMap().put("redo", redoAction);
  InputMap imap = tc.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
  imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_Z, Event.CTRL_MASK), "undo");
  imap.put(KeyStroke.getKeyStroke(KeyEvent.VK_Y, Event.CTRL_MASK), "redo");

  JPopupMenu popup = new JPopupMenu();
  popup.add(cutAction);
  popup.add(copyAction);
  popup.add(pasteAction);
  popup.add(deleteAction);
  popup.addSeparator();
  popup.add(undoAction);
  popup.add(redoAction);

  popup.addPopupMenuListener(new PopupMenuListener() {
    public void popupMenuCanceled(PopupMenuEvent e) {}
    public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
      undoAction.setEnabled(true);
      redoAction.setEnabled(true);
    }
    public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
      JPopupMenu pop = (JPopupMenu)e.getSource();
      JTextField field = (JTextField)pop.getInvoker();
      boolean flg = field.getSelectedText()!=null;
      cutAction.setEnabled(flg);
      copyAction.setEnabled(flg);
      deleteAction.setEnabled(flg);
      undoAction.setEnabled(manager.canUndo());
      redoAction.setEnabled(manager.canRedo());
    }
  });
  tc.setComponentPopupMenu(popup);
  return popup;
}

References

JTable CellEditor PopupMenu(Japanese)

2010/10/26

JTree node highlight search

Code

class HighlightTreeCellRenderer extends DefaultTreeCellRenderer {
  private static final Color rollOverRowColor = new Color(220, 240, 255);
  private final TreeCellRenderer renderer;
  public String q;
  public HighlightTreeCellRenderer(TreeCellRenderer renderer) {
    this.renderer = renderer;
  }

  @Override public Component getTreeCellRendererComponent(JTree tree, Object value,
        boolean isSelected, boolean expanded,
        boolean leaf, int row, boolean hasFocus) {
    JComponent c = (JComponent) renderer.getTreeCellRendererComponent(
        tree, value, isSelected, expanded, leaf, row, hasFocus);
    if (isSelected) {
      c.setOpaque(false);
      c.setForeground(getTextSelectionColor());
      // c.setBackground(Color.BLUE); // getBackgroundSelectionColor());
    } else {
      c.setOpaque(true);
      if (q != null && !q.isEmpty() && value.toString().startsWith(q)) {
        c.setForeground(getTextNonSelectionColor());
        c.setBackground(rollOverRowColor);
      } else {
        c.setForeground(getTextNonSelectionColor());
        c.setBackground(getBackgroundNonSelectionColor());
      }
    }
    return c;
  }
}

References

JTree node highlight search(Japanese)

Google Tag Manager

2011/02/28

Highlight entire JTree row on selection

Code

References

2011/02/03

Translucent JInternalFrame (Nimbus)

Code

References

2011/01/20

JTable RowHeader

Code

References

2010/11/30

JTable CellEditor PopupMenu

Code

References

2010/10/26

JTree node highlight search

Code

References