java - JTable 按键事件未触发

Question

我正在为我的列(ButtonColumns)使用 TableCellEditor，如下所示。当我输入向下键时，与 Jtable 关联的按键事件未触发。请指导我解决这个障碍，提前谢谢。下面的SSCCE如下

class ButtonEditor_Utility extends DefaultCellEditor {

protected JButton button;



public ButtonEditor_Utility() {
button.setActionCommand(tableName);
button.addActionListener(new ActionListener() {

        public void actionPerformed(ActionEvent e) {
            fireEditingStopped();
        }
    });
}

public Component getTableCellEditorComponent(JTable table, Object value,
        boolean isSelected, int row, int column) {
    if (isSelected) {
        button.setForeground(table.getSelectionForeground());
        button.setBackground(table.getSelectionBackground());
    } else {
        button.setForeground(table.getForeground());
        button.setBackground(table.getBackground());
    }

    label = (value == null) ? "" : value.toString();
    button.setText(label);
    isPushed = true;
    return button;
}



public boolean stopCellEditing() {
    isPushed = false;
    return super.stopCellEditing();
}

protected void fireEditingStopped() {
    super.fireEditingStopped();
}

}

 Class Test extent JFframe{

  public void    AddButtonColumn(){
 tblDetailInfo.getColumn(1).setCellEditor(
 new ButtonEditor_Utility(new JCheckBox(), this, 1, selectedRow,    this,null, "TestDB"));}

//下面的事件没有响应向下键//其 key 代码是40

    private void tblDetailInfoKeyPressed(java.awt.event.KeyEvent evt){                                         
    // TODO add your handling code here:
    if (evt.getKeyCode() == 40) {

        int rowId = tblDetailInfo.getRowCount() - 1;

        setSelectedRow(rowId);
        tblDetailInfo.setCellSelectionEnabled(true);
        tblDetailInfo.changeSelection(rowId, 0, false, false);
        tblDetailInfo.requestFocus();
        tblDetailInfo.scrollRectToVisible(new Rectangle(tblDetailInfo.getCellRect(rowId, 0, true)));
        AddDetailRow();

    }
}  

   private void formWindowOpened(java.awt.event.WindowEvent evt){                      AddButtonColumn(); }

public static void main(String args[]) {
    java.awt.EventQueue.invokeLater(new Runnable() {

        public void run() {

            Test test = new Test();


            test.setVisible(true);
        }
    });
} }

}

Answer 1

不要尝试强制使用 JLabel 和 KeyEvent 作为表格单元格编辑器，而是使用实际的 TableCellEditor，例如 @camickr 的 ButtonColumn 。这个TableTest说明了一种使用 ButtonColumn 的方法在 JTable 中。优点是您可以获得所有熟悉的key bindings用于导航(箭头键)和激活(空格键)。