JTable multiline

[iceT18]

Hi,

I want to make a new line in a cell when i press the ENTER key (multiline).

------------------
| line | a |
| line | a |
------------------
| b | b |
------------------

For a new table line i have a button.

this is my code:

private static class TextTableCellRenderer extends JTextArea implements TableCellRenderer {
 
        protected static Border noFocusBorder = new EmptyBorder(1, 1, 1, 1);
 
        public TextTableCellRenderer() {
            super();
            setWrapStyleWord(true);
            setLineWrap(true);
            setBorder(noFocusBorder);
        }
 
        public Component getTableCellRendererComponent(JTable table,
                Object value,
                boolean isSelected,
                boolean hasFocus,
                int row,
                int column) {
            if (isSelected) {
                super.setForeground(table.getSelectionForeground());
                super.setBackground(table.getSelectionBackground());
            } else {
                super.setForeground(table.getForeground());
                super.setBackground(table.getBackground());
            }
 
            setFont(table.getFont());
            if (hasFocus) {
                setBorder(UIManager.getBorder("Table.focusCellHighlightBorder"));
                if (!isSelected && table.isCellEditable(row, column)) {
                    Color col;
                    col = UIManager.getColor("Table.focusCellForeground");
                    if (col != null) {
                        super.setForeground(col);
                    }
                    col = UIManager.getColor("Table.focusCellBackground");
                    if (col != null) {
                        super.setBackground(col);
                    }
                }
            } else {
                setBorder(noFocusBorder);
            }
 
            setEnabled(table.isEnabled());
            setValue(table, row, column, value);
            return this;
        }
 
        protected void setValue(JTable table, int row, int column, Object value) {
            if (value != null) {
                String text = value.toString();
                setText(text);
 
                View view = getUI().getRootView(this);
                view.setSize((float) table.getColumnModel().getColumn(column).getWidth() - 3, -1);
                float y = view.getPreferredSpan(View.Y_AXIS);
                int h = (int) Math.ceil(y + 3);
 
                if (table.getRowHeight(row) != h) {
                    table.setRowHeight(row, h);
                }
            } else {
                setText("");
            }
        }
    }

thanks
iceT

[Steve11235]

If you look at the api for DefaultTableCellRenderer, you will see that it is a JLabel with certain methods stubbed out for performance reasons. You can make your own TableCellRenderer using any Component by stubbing out the same methods.TableCellEditor is a subclass of Renderer that allows user input with a little code to handle saving the contents when editing is stopped.

Look at the multi-line text JComponents offered by Swing. Try making your own Renderer from the interface (it only has the one method) by extending a JTextArea and implementing the interface. Check the api for the methods to stub off.