Java Swing Tips: TableCellEditor

Showing posts with label TableCellEditor. Show all posts

2023/07/01

Click on the JCheckBox placed in the JTable cell to expand and collapss the row height

Code

int defaultHeight = 20;
JTable table = new JTable(model) {
  @Override public void updateUI() {
    super.updateUI();
    setAutoCreateRowSorter(true);
    setSurrendersFocusOnKeystroke(true);
    setRowHeight(defaultHeight);
    setDefaultRenderer(RowHeader.class, new RowHeaderRenderer());
    setDefaultEditor(RowHeader.class, new RowHeaderEditor());
    TableColumn column = getColumnModel().getColumn(1);
    column.setCellRenderer(new TextAreaCellRenderer());
    column.setPreferredWidth(160);
  }
};
table.getModel().addTableModelListener(e -> {
  int mc = e.getColumn();
  int mr = e.getFirstRow();
  int vc = table.convertColumnIndexToView(mc);
  int vr = table.convertRowIndexToView(mr);
  Object o = table.getValueAt(vr, vc);
  if (mc == 0 && o instanceof RowHeader) {
    RowHeader rh = (RowHeader) o;
    int vc1 = table.convertColumnIndexToView(1);
    TableCellRenderer r = table.getColumnModel().getColumn(vc1)
                               .getCellRenderer();
    Object v = table.getValueAt(vr, vc1);
    Component c = r.getTableCellRendererComponent(
        table, v, true, true, vr, vc1);
    int h = rh.isSelected() ? c.getPreferredSize().height
                            : defaultHeight;
    table.setRowHeight(vr, h);
  }
});

References

Click on the JCheckBox placed in the JTable cell to expand and collapss the row height(Japanese)

2019/07/30

Enable focus move by tab key in cell editor of JTable

Code

JTable table = makeTable();
ActionMap am = table.getActionMap();
Action sncc = am.get("selectNextColumnCell");
Action action = new AbstractAction() {
  @Override public void actionPerformed(ActionEvent e) {
    if (!table.isEditing() || !isEditorFocusCycle(table.getEditorComponent())) {
      // System.out.println("Exit editor");
      sncc.actionPerformed(e);
    }
  }
};
am.put("selectNextColumnCell2", action);

InputMap im = table.getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT);
im.put(KeyStroke.getKeyStroke(KeyEvent.VK_TAB, 0), "selectNextColumnCell2");
// ...
protected boolean isEditorFocusCycle(Component editor) {
  Component child = CheckBoxesEditor.getEditorFocusCycleAfter(editor);
  if (child != null) {
    child.requestFocus();
    return true;
  }
  return false;
}
// ...
public static Component getEditorFocusCycleAfter(Component editor) {
  Component fo = KeyboardFocusManager.getCurrentKeyboardFocusManager().getFocusOwner();
  if (fo == null || !(editor instanceof Container)) {
    return null;
  }
  Container root = (Container) editor;
  if (!root.isFocusCycleRoot()) {
    root = root.getFocusCycleRootAncestor();
  }
  if (root == null) {
    return null;
  }
  // System.out.println("FocusCycleRoot: " + root.getClass().getName());
  FocusTraversalPolicy ftp = root.getFocusTraversalPolicy();
  Component child = ftp.getComponentAfter(root, fo);
  if (child != null && SwingUtilities.isDescendingFrom(child, editor)) {
    // System.out.println("requestFocus: " + child.getClass().getName());
    // child.requestFocus();
    return child;
  }
  return null;
}

References

Enable focus move by tab key in cell editor of JTable(Japanese)

2016/08/26

Use an editable JComboBox as a TableCellEditor

Code

class ComboCellEditor extends AbstractCellEditor implements TableCellEditor {
  private final JComboBox<String> combo = new JComboBox<>();
  protected ComboCellEditor() {
    super();
    combo.setEditable(true);
    combo.addActionListener(e -> {
      fireEditingStopped();
    });
  }
  @Override public Component getTableCellEditorComponent(
      JTable table, Object value, boolean isSelected, int row, int column) {
    if (value instanceof ComboBoxModel) {
      @SuppressWarnings("unchecked")
      ComboBoxModel<String> m = (ComboBoxModel<String>) value;
      combo.setModel(m);
    }
    return combo;
  }
  @Override public Object getCellEditorValue() {
    @SuppressWarnings("unchecked")
    DefaultComboBoxModel<String> m = (DefaultComboBoxModel<String>) combo.getModel();
    if (combo.isEditable()) {
      String str = Objects.toString(combo.getEditor().getItem(), "");
      if (!str.isEmpty() && m.getIndexOf(str) < 0) {
        m.insertElementAt(str, 0);
        combo.setSelectedIndex(0);
      }
    }
    return m;
  }
}

References

Use an editable JComboBox as a TableCellEditor(Japanese)

2011/04/19

Transparent JTableHeader

Code

class TransparentHeader extends JLabel implements TableCellRenderer {
  private final Border b = BorderFactory.createCompoundBorder(
      BorderFactory.createMatteBorder(0, 0, 1, 0, Color.BLACK),
      BorderFactory.createEmptyBorder(2, 2, 1, 2));
  private final Color alphaZero = new Color(0x0, true);
  @Override public Component getTableCellRendererComponent(
      JTable table, Object value, boolean isSelected, boolean hasFocus,
      int row, int column) {
    this.setText(Objects.toString(value, ""));
    this.setHorizontalAlignment(SwingConstants.CENTER);
    this.setOpaque(false);
    this.setBackground(alphaZero);
    this.setForeground(Color.BLACK);
    this.setBorder(b);
    return this;
  }
}

References

2011/03/10

CheckBoxes in JTable Cell

Code

class CheckBoxesPanel extends JPanel {
  private static final String OSNAME = System.getProperty("os.name");
  protected final String[] title = {"r", "w", "x"};
  public JCheckBox[] buttons;
  public CheckBoxesPanel() {
    super();
    setOpaque(false);
    setBackground(new Color(0x0, true));
    setLayout(new BoxLayout(this, BoxLayout.X_AXIS));
    initButtons();
  }

  protected void initButtons() {
    buttons = new JCheckBox[title.length];
    for (int i = 0; i < buttons.length; i++) {
      JCheckBox b = new JCheckBox(title[i]);
      b.setOpaque(false);
      b.setFocusable(false);
      b.setRolloverEnabled(false);
      b.setBackground(new Color(0x0, true));
      buttons[i] = b;
      add(b);
      add(Box.createHorizontalStrut(5));
    }
  }

  protected void updateButtons(Object v) {
    if ("Windows 7".equals(OSNAME)) { //Windows aero?
      removeAll();
      initButtons();
    }
    Integer i = (Integer) (v == null ? 0 : v);
    buttons[0].setSelected((i & (1 << 2)) != 0);
    buttons[1].setSelected((i & (1 << 1)) != 0);
    buttons[2].setSelected((i & (1 << 0)) != 0);
  }
}

class CheckBoxesRenderer extends CheckBoxesPanel
                         implements TableCellRenderer, Serializable {
  public CheckBoxesRenderer() {
    super();
    setName("Table.cellRenderer");
  }

  @Override public Component getTableCellRendererComponent(JTable table,
      Object value, boolean isSelected, boolean hasFocus, int row, int column) {
    updateButtons(value);
    return this;
  }

  public static class UIResource extends CheckBoxesRenderer implements UIResource {}
}

class CheckBoxesEditor extends CheckBoxesPanel
                       implements TableCellEditor, Serializable {
  public CheckBoxesEditor() {
    ActionListener al = new ActionListener() {
      @Override public void actionPerformed(ActionEvent e) {
        fireEditingStopped();
      }
    };
    ActionMap am = getActionMap();
    for (int i = 0; i < buttons.length; i++) {
      final JCheckBox b = buttons[i];
      b.addActionListener(al);
      am.put(title[i], new AbstractAction(title[i]) {
        @Override public void actionPerformed(ActionEvent e) {
          b.setSelected(!b.isSelected());
          fireEditingStopped();
        }
      });
    }
    InputMap im = getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
    im.put(KeyStroke.getKeyStroke(KeyEvent.VK_R, 0), title[0]);
    im.put(KeyStroke.getKeyStroke(KeyEvent.VK_W, 0), title[1]);
    im.put(KeyStroke.getKeyStroke(KeyEvent.VK_X, 0), title[2]);
  }

  @Override public Component getTableCellEditorComponent(JTable table,
        Object value, boolean isSelected, int row, int column) {
    updateButtons(value);
    return this;
  }

  @Override public Object getCellEditorValue() {
    int i = 0;
    if (buttons[0].isSelected()) i |= 1 << 2;
    if (buttons[1].isSelected()) i |= 1 << 1;
    if (buttons[2].isSelected()) i |= 1 << 0;
    return i;
  }

  // Copied from AbstractCellEditor
  protected EventListenerList listenerList = new EventListenerList();
  transient protected ChangeEvent changeEvent = null;
  // ...

References

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)

2010/08/02

Transparent, Translucent JTable

Code

JScrollPane scroll = new JScrollPane(table) {
  private final TexturePaint texture = makeImageTexture();
  @Override protected JViewport createViewport() {
    return new JViewport() {
      @Override protected void paintComponent(Graphics g) {
        if (texture != null) {
          Graphics2D g2 = (Graphics2D) g;
          g2.setPaint(texture);
          g2.fillRect(0, 0, getWidth(), getHeight());
        }
        super.paintComponent(g);
      }
    };
  }
};
Color alphaZero = new Color(0x0, true);
table.setOpaque(false);
table.setBackground(alphaZero);
scroll.getViewport().setOpaque(false);
scroll.getViewport().setBackground(alphaZero);

References

2009/10/06

Multiple JButtons in a JTable cell

Code

class ButtonsPanel extends JPanel {
  public final List<JButton> buttons =
    Arrays.asList(new JButton("view"), new JButton("edit"));
  public ButtonsPanel() {
    super();
    setOpaque(true);
    for (JButton b: buttons) {
      b.setFocusable(false);
      b.setRolloverEnabled(false);
      add(b);
    }
  }
}

class ButtonsRenderer extends ButtonsPanel
                      implements TableCellRenderer {
  public ButtonsRenderer() {
    super();
    setName("Table.cellRenderer");
  }

  @Override public Component getTableCellRendererComponent(
      JTable table, Object value, boolean isSelected,
      boolean hasFocus, int row, int column) {
    Color bgc = isSelected ? table.getSelectionBackground()
                           : table.getBackground()
    setBackground(bgc);
    return this;
  }
}

class ButtonsEditor extends ButtonsPanel
                    implements TableCellEditor {
  public ButtonsEditor(final JTable table) {
    super();
    // ---->
    // DEBUG: view button click
    //   -> control key down + edit button(same cell) press
    //   -> remain selection color
    MouseListener ml = new MouseAdapter() {
      @Override public void mousePressed(MouseEvent e) {
        ButtonModel m = ((JButton) e.getSource()).getModel();
        if (m.isPressed() && table.isRowSelected(table.getEditingRow())
                          && e.isControlDown()) {
          setBackground(table.getBackground());
        }
      }
    };
    buttons.get(0).addMouseListener(ml);
    buttons.get(1).addMouseListener(ml);
    // <----

    buttons.get(0).addActionListener(new ActionListener() {
      @Override public void actionPerformed(ActionEvent e) {
        fireEditingStopped();
        JOptionPane.showMessageDialog(table, "Viewing");
      }
    });

    buttons.get(1).addActionListener(new ActionListener() {
      @Override public void actionPerformed(ActionEvent e) {
        int row = table.convertRowIndexToModel(table.getEditingRow());
        Object o = table.getModel().getValueAt(row, 0);
        fireEditingStopped();
        JOptionPane.showMessageDialog(table, "Editing: " + o);
      }
    });

    addMouseListener(new MouseAdapter() {
      @Override public void mousePressed(MouseEvent e) {
        fireEditingStopped();
      }
    });
  }

  @Override public Component getTableCellEditorComponent(JTable table,
        Object value, boolean isSelected, int row, int column) {
    this.setBackground(table.getSelectionBackground());
    return this;
  }

  @Override public Object getCellEditorValue() {
    return "";
  }

  // Copied from AbstractCellEditor
  // protected EventListenerList listenerList = new EventListenerList();
  transient protected ChangeEvent changeEvent = null;
  @Override public boolean isCellEditable(java.util.EventObject e) {
    return true;
  }
// ...

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2023/07/01

Code

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2019/07/30

Code

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2016/08/26

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2011/04/19

Code

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2011/03/10

Code

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2010/11/30

Code

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2010/08/02

Code

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2009/10/06

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