如何使一个JTable列含有不JTextField的，但JTextAreas？ [英] How to make a JTable column to contain not JTextFields, but JTextAreas?

问题描述

请告诉我，怎样才能让一个JTable列包含JTextAreas，
所以电池的身高会增加，当用户输入大量的文字和
我们可以看到多行（元得以扩大;作为结果，行将太展开）

Please tell me, how to make a JTable column to contain JTextAreas, so the cell's height will increase when user types a lot of text and we can see more than one line (cell gets expanded; as result, row will expand too)

推荐答案

您需要编写自己的基础上的JTextArea单元格渲染器和编辑器：

You need to write your own cell renderer and editor based on JTextArea:

    public class Start
{
    public static class JTextPaneCellEditor extends AbstractCellEditor implements TableCellEditor, KeyListener
    {
        private JViewport viewport;
        private JTable table;
        private int row;
        private JTextPane pane;

        public JTextPaneCellEditor(){
            viewport = new JViewport();
            pane = new JTextPane();
            viewport.add(pane);
            pane.addKeyListener(this);
        }

        @Override public Object getCellEditorValue(){
            return pane.getText();
        }

        @Override public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column){
            this.table = table;
            this.row = row;
            pane.setText(value.toString());
            int newHeight = (int)pane.getPreferredSize().getHeight();
            if(table.getRowHeight(row) < newHeight){
                table.setRowHeight(row, newHeight);
            }
            return pane;
        }

        @Override public boolean isCellEditable(EventObject e){
            if (e instanceof MouseEvent) {
                return ((MouseEvent)e).getClickCount() >= 2;
            }
            return true;
        }

        @Override public void keyTyped(KeyEvent e){
            table.setRowHeight(row, (int)pane.getPreferredSize().getHeight());
        }

        @Override public void keyPressed(KeyEvent e){
            if(e.getKeyCode() == KeyEvent.VK_ENTER){
                stopCellEditing();
            }
        }

        @Override public void keyReleased(KeyEvent e){
        }
    }

    private static class JTextPaneCellRenderer extends JViewport implements TableCellRenderer
    {
        JTextPane pane;
        JTextPaneCellRenderer(){
            pane = new JTextPane();
            add(pane);
        }

        @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column){
            pane.setText(value.toString());
            table.setRowHeight(row, (int)pane.getPreferredSize().getHeight());
            return this;
        }
    }

    public static void main(String[] args){
        JTable table = new JTable(new String[][]{{"String String String String StringString String String String StringString String String String StringString String String String StringString String String String String"}, {"String 2"}}, new String[]{"Column"});
        table.setDefaultRenderer(Object.class, new JTextPaneCellRenderer());
        table.setDefaultEditor(Object.class, new JTextPaneCellEditor());

        JFrame test = new JFrame();
        test.add(new JScrollPane(table));
        test.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        test.setSize(300, 300);
        test.setLocationRelativeTo(null);
        test.setVisible(true);
    }
}

编辑：添加视口更好的大小。但该行依然没有扩大了第一次编辑。没有人有任何想法？

add viewports for better sizing. But the row is still not expanded on first edit. Does anyone have any ideas?

EDIT2：我同意的意见。你想要的东西是可能的，但你需要未经检验的，hackish的自定义实现。你将被关闭，如果你重新设计你的布局，以排除这样的JTable巫术更好。

I agree with the comments. The thing you want is possible, but you need untested, hackish custom implementation. You will be better off if you redesigned your layout to exclude such JTable sorcery.

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