如何在JTable的单元格上禁用鼠标单击事件?

时间:2012-12-11 09:40:17

标签: java swing jtable mouseevent tablecelleditor

我正在验证JTable的特定列。我的要求是该列的所有单元格应该只允许使用字母表。我已将keylistener添加到Jtable的对象中,并编写了如下逻辑:

public void keyTyped ( KeyEvent e ) {

    if(!(e.getKeyChar()>='a' &&e.getKeyChar()>='z')) {
        getToolkit.beep();
    } 
}

最初当焦点在单元格上并键入内容时,键事件被触发正常,但是当我单击相同的单元格并键入时,键事件不会被触发。所以我决定在JTable上禁用鼠标点击事件。如何禁用JTable单元格上的鼠标单击事件?

3 个答案:

答案 0 :(得分:2)

只需在该列上设置一个不允许输入错误字符的特定单元格编辑器。可以肯定的是,我还会通过正确覆盖TableModel验证setValueAt(Object, int, int)中的输入:

这是一个仅允许从A到Z和a到z的字符的示例:

import java.awt.BorderLayout;
import java.util.Vector;

import javax.swing.DefaultCellEditor;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableModel;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DocumentFilter;
import javax.swing.text.PlainDocument;

public class TestTable {

    private static final String ALPHA_ONLY_REGEXP = "\\p{Alpha}*";
    private static final String NONALPHA_REGEXP = "[^\\p{Alpha}]+";
    private int ALPHA_ONLY_COLUMN_INDEX = 2;

    protected String validateAndFixString(String string) {
        if (!string.matches(ALPHA_ONLY_REGEXP)) {
            string = string.replaceAll(NONALPHA_REGEXP, "");
        }
        return string;
    }

    protected void initUI() {
        final DefaultTableModel model = new DefaultTableModel() {
            @Override
            public void setValueAt(Object aValue, int row, int column) {
                if (column == ALPHA_ONLY_COLUMN_INDEX) {
                    if (aValue != null) {
                        aValue = validateAndFixString((String) aValue);
                    }
                }
                super.setValueAt(aValue, row, column);
            }
        };
        for (int i = 0; i < 5; i++) {
            model.addColumn("Col-" + (i + 1));
        }
        for (int i = 0; i < 200; i++) {
            Vector<Object> row = new Vector<Object>();
            for (int j = 0; j < 5; j++) {
                if (j == ALPHA_ONLY_COLUMN_INDEX) {
                    row.add("AlphabetOnly");
                }
                row.add("New cell - " + (j + 1));
            }
            model.addRow(row);
        }
        JTable table = new JTable(model);
        JTextField alphaOnly = new JTextField();
        ((PlainDocument) alphaOnly.getDocument()).setDocumentFilter(new DocumentFilter() {
            @Override
            public void insertString(FilterBypass fb, int offset, String string, AttributeSet attr) throws BadLocationException {
                string = validateAndFixString(string);
                super.insertString(fb, offset, string, attr);
            }

            @Override
            public void replace(FilterBypass fb, int offset, int length, String text, AttributeSet attrs) throws BadLocationException {
                text = validateAndFixString(text);
                super.replace(fb, offset, length, text, attrs);
            }
        });
        table.getColumnModel().getColumn(ALPHA_ONLY_COLUMN_INDEX).setCellEditor(new DefaultCellEditor(alphaOnly));
        JFrame frame = new JFrame(TestTable.class.getSimpleName());
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JScrollPane scrollpane = new JScrollPane(table);
        frame.add(scrollpane, BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) throws ClassNotFoundException, InstantiationException, IllegalAccessException,
            UnsupportedLookAndFeelException {
        UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new TestTable().initUI();
            }
        });
    }

}

答案 1 :(得分:1)

也许禁用鼠标事件并不是一个好主意。正如你没有明确说的那样,我不知道你想要达到什么目的;你可以尝试以下一些方法:

  1. 禁用表格本身:table.disable();

  2. 使单元格不可编辑(在表模型上):

    public boolean isCellEditable(int row,int col)  {
        返回false;
     }

  3. 如果你必须禁用鼠标事件,可能会尝试添加一个什么都不做的鼠标监听器:

    table.addMouseListener(java.awt.event.MouseAdapter  
      {  
        public void mouseClicked( java.awt.event.MouseEvent e)  
        {  
          // do nothing...  
        }  
      });
    

    希望有所帮助。

答案 2 :(得分:0)

你需要将keylistener添加到你的编辑器中。

一旦编辑,就会在该编辑器中开始关注,而不再是你的jtable。