如何在JTable单元中单击JButton？ [英] How to make a JButton in a JTable cell click-able?

问题描述

我有一个带有自定义单元格渲染器的JTable。该单元格是一个包含JTextField和JButton的JPanel。 JTextField包含一个整数，当用户点击JButton时，整数应该增加。

I have a JTable with a custom cell renderer. The cell is a JPanel that contains a JTextField and a JButton. The JTextField contains an integer, and when the user clicks on the JButton the integer should be increased.

问题是当我拥有它时不能点击JButton在JTable单元格中。如何点击它？

The problem is that the JButton can't be clicked when I have it in a JTable cell. How can I make it click-able?

这是我的测试代码：

public class ActiveTable extends JFrame {

    public ActiveTable() {
        RecordModel model = new RecordModel();
        model.addRecord(new Record());
        JTable table = new JTable(model);
        EditorAndRenderer editorAndRenderer = new EditorAndRenderer();
        table.setDefaultRenderer(Object.class, editorAndRenderer);
        table.setDefaultEditor(Object.class, editorAndRenderer);
        table.setRowHeight(38);

        add(new JScrollPane(table));
        setPreferredSize(new Dimension(600, 400));
        pack();
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setTitle("Active Table");
        setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new ActiveTable();
            }
        });
    }

    class RecordModel extends AbstractTableModel {

        private final List<Record> records = new ArrayList<Record>();

        @Override
        public int getColumnCount() {
            return 1;
        }

        @Override
        public int getRowCount() {
            return records.size();
        }

        @Override
        public Object getValueAt(int rowIndex, int columnIndex) {
            return records.get(rowIndex);
        }

        public void addRecord(Record r) {
            records.add(r);
            fireTableRowsInserted(records.size()-1, records.size()-1);
        }

    }

    class Record {
        private int count = 1;
        public int getCount() { return count; }
        public void increase() { count = count + 1; }
    }

    class CellPanel extends JPanel {
        private Record record;
        private final JTextField field = new JTextField(8);
        private final Action increaseAction = new AbstractAction("+") {
            public void actionPerformed(ActionEvent e) {
                record.increase();
                field.setText(record.getCount()+"");
                JTable table = (JTable) SwingUtilities.getAncestorOfClass(JTable.class, (Component) e.getSource());
                table.getCellEditor().stopCellEditing();
            }
        };
        private final JButton button = new JButton(increaseAction);

        public CellPanel() {
            add(field);
            add(button);
        }

        public void setRecord(Record r) {
            record = r;
            field.setText(record.getCount()+"");
        }

        public Record getRecord() {
            return record;
        }
    }

    class EditorAndRenderer extends AbstractCellEditor implements TableCellEditor, TableCellRenderer {

        private final CellPanel renderer = new CellPanel();
        private final CellPanel editor = new CellPanel();

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value,
                boolean isSelected, boolean hasFocus, int row, int column) {
            renderer.setRecord((Record) value);
            return renderer;
        }

        @Override
        public Component getTableCellEditorComponent(JTable table, Object value,
                boolean isSelected, int row, int column) {
            editor.setRecord((Record) value);
            return editor;
        }

        @Override
        public Object getCellEditorValue() {
            return editor.getRecord();
        }

        @Override
        public boolean isCellEditable(EventObject ev) {
            return true;
        }

        @Override
        public boolean shouldSelectCell(EventObject ev) {
            return false;
        }
    }
}

推荐答案

我的最后一个例子是基于mKrobels提供的代码，回答了如何实现动态GUI的摆动

I based my last example on the code provided by mKrobels answer to How to implement dynamic GUI in swing

他和我在问题中的例子的主要区别在于他使用 DefaultTableModel 而我使用 AbstractTableModel上。他的例子确实有效，但不是我的。

The main difference between his and my example in the question is that he use DefaultTableModel and I use AbstractTableModel. His example does work, but not mine.

我发现的解决方案是我必须实现 isCellEditable（）在TableModel中，所以添加了这个方法，我的例子有效：

The solution I found was that I had to implement isCellEditable() in the TableModel, so with this method added, my example works:

@Override
public boolean isCellEditable(int rowIndex, int columnIndex) {
    return true;
}

这篇关于如何在JTable单元中单击JButton？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！