java - Jtable 单元格上的 Jbutton 只能工作一次

Question

我对 Java Swing 还很陌生，并且在 Jtable 单元格上使用 Jbutton 时遇到一些问题。

问题是 Jbutton 只能工作一次，然后就无法正常工作。第一次之后，当我再次单击时没有任何反应， getTableCellEditorComponent 仅被调用一次。我希望它像普通按钮一样工作。

我的按钮编辑器和按钮渲染器类如下:

package buttonontable;

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.EventObject;
import java.util.HashMap;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.event.CellEditorListener;
import javax.swing.event.ChangeEvent;
import javax.swing.table.TableCellEditor;


 public class MyButtonEditor extends JButton implements TableCellEditor {
  protected JButton button;
  ButtonOnJtableAction buttonOnJtableAction;

  String labelStr;




  public MyButtonEditor(String buttonStr,ButtonOnJtableAction _buttonOnJtableAction) {
    super(buttonStr);
    buttonOnJtableAction = _buttonOnJtableAction;
    button = new JButton();
    button.setOpaque(true);
    System.out.println("MyButtonEditor constructed");

     }

    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {


        System.out.println("getTableCellEditorComponent");
        JOptionPane.showMessageDialog(table, "Pressed at " + row + "x" + column);
        buttonOnJtableAction.buttonPressed(table,row,column);
        return this;
    }

    public void cancelCellEditing() {
        System.out.println("cancelCellEditing");
        System.out.println("Cancel");
    }

    public boolean stopCellEditing() {
        System.out.println("stopCellEditing");
        return true;
    }

    public Object getCellEditorValue() {
        System.out.println("getCellEditorValue");
        return null;
    }

    public boolean isCellEditable(EventObject anEvent) {
        return true;
    }

    public boolean shouldSelectCell(EventObject anEvent) {
        return true;
    }

    public void addCellEditorListener(CellEditorListener l) {
    }

    public void removeCellEditorListener(CellEditorListener l) {
    }

    protected void fireCellEditing(ChangeEvent e){

    }

}



    package buttonontable;

    import java.awt.Component;
    import javax.swing.JButton;
    import javax.swing.JTable;
    import javax.swing.UIManager;
    import javax.swing.table.TableCellRenderer;


        public class MyButtonRenderer extends JButton implements TableCellRenderer {

          String buttonStr;
          public MyButtonRenderer(String _buttonStr) {
            setOpaque(true);
            buttonStr = _buttonStr;
            setText(buttonStr);
          }

          public Component getTableCellRendererComponent(JTable table, Object value,boolean isSelected, boolean hasFocus, int row, int column) {

           System.out.println("getTableCellRendererComponent");

            if (isSelected) {
              setForeground(table.getSelectionForeground());
              setBackground(table.getSelectionBackground());
            } else{
              setForeground(table.getForeground());
              setBackground(UIManager.getColor("Button.background"));
            }
            setText( (value ==null) ? buttonStr : value.toString() );
            return this;
          }
        }

Answer 1

通常，当我必须这样做时，我会引用 http://download.oracle.com/javase/6/docs/api/然后转到页面左侧的 JTable，在 JTable javadoc 页面的开头有一个指向“如何使用表”的链接。靠近底部的是如何在 JTable 中放置按钮的示例。看起来该页面中的部分是“使用其他编辑器”。我通常遵循SUN指定的内容。希望这会有所帮助...