JTable:如何通过弹出输入对话框使用自定义编辑器更新单元格？

Question

我正在学习这个使用TableDialogEditDemo.java示例类的oracle教程

我为JTable编写了一个自定义单元格渲染器和编辑器.

我将它们注册到这个Oracle TableDialogEditDemo.java类

        ...
        ...
        //Set up renderer and editor for the Favorite Color column.
        table.setDefaultRenderer(Color.class,
                                 new ColorRenderer(true));
        table.setDefaultEditor(Color.class,
                               new ColorEditor());

        TableColumn c = table.getColumnModel().getColumn(2);
        c.setCellRenderer(new CellStringRenderer()); //My custom Renderer
        c.setCellEditor(new CellStringEditor()); // My custom Editor

        //Add the scroll pane to this panel.
        add(scrollPane);
        ...
        ...

(更新说明)当我单击一个单元格时,会弹出一个输入对话框,这是正常的,当我输入文本并单击"确定"时,JTable中的单元格会更新,但文本不会正确显示/呈现,I必须单击任何其他单元格才能使单元格中的文本内容正确显示.

我的代码有什么问题？

我的渲染器

import java.awt.Component;
import javax.swing.JLabel;
import javax.swing.JTable;
import javax.swing.table.TableCellRenderer;

public class CellStringRenderer extends JLabel implements TableCellRenderer
{

    public CellStringRenderer()
    {
        this.setOpaque(true);
    }


    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
    {
       String stringValue = (String) value;
       this.setText(stringValue);
       return this;
    }

}

我的编辑(更新)

import java.awt.Component;
import javax.swing.*;
import javax.swing.table.TableCellEditor;


public class CellStringEditor extends AbstractCellEditor
        implements TableCellEditor
{

    String input;

    @Override
    public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column)
    {
        if (isSelected)
        {
            JOptionPane dialog = new JOptionPane();
            input = dialog.showInputDialog(null, "new value");
            return dialog;   
        }
        return null;
    }

    @Override
    public Object getCellEditorValue()
    {
        return input;
    }
}

Answer 1

我是这个问题的作者,我解决了这个问题.我将提供解决方案,以便其他人可以从中获得帮助.

我正在尝试编写自定义渲染器和自定义编辑器以与JTable一起使用.渲染器只是使用JLabel来显示数据.它已经是JTable的标准组件.编辑器是一个对话框,在单击要编辑的单元格时出现.

这是解决方案:

保持不变的类是Oracle +我的自定义渲染器类中的三个类

1. TableDialogEditDemo.java.

2. ColorEditor.java

3. ColorRenderer.java

4.CellStringRenderer类在上面的问题体(我的类)中提供

将要更新的类是自定义编辑器类(我将其名称从"CellStringEditor"更改为"DialogStringEditor"

import java.awt.Color;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.AbstractCellEditor;
import javax.swing.JButton;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.table.TableCellEditor;

public class DialogStringEditor extends AbstractCellEditor
        implements TableCellEditor,
        ActionListener
{

    String newInput;
    String oldValue;
    JButton button;
    static final String EDIT = "edit";

    public DialogStringEditor()
    {
        button = new JButton();
        button.setBackground(Color.WHITE);
        button.setActionCommand(EDIT);
        button.addActionListener(this);
        button.setBorderPainted(false);
    }

    @Override
    public void actionPerformed(ActionEvent e)
    {
        if (EDIT.equals(e.getActionCommand()))
        {
            newInput = JOptionPane.showInputDialog("Edit", oldValue);
            if (newInput == null)
            {
                newInput = oldValue;
            }
            fireEditingStopped();
        }
    }

    @Override
    public Object getCellEditorValue()
    {
        return newInput;
    }

    @Override
    public Component getTableCellEditorComponent(JTable table,
            Object value,
            boolean isSelected,
            int row,
            int column)
    {
        newInput = (String) value;
        oldValue = (String) value;
        return button;
    }
}

这样可以

您还可以对渲染器类"CellStringRenderer"进行一些更新,以控制单元格的选择和非选择颜色的显示方式.

更新此方法:

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
    {
        String stringValue = (String) value;
        this.setText(stringValue);

        if (isSelected)
        {
            this.setBackground(table.getSelectionBackground());
            this.setForeground(table.getSelectionForeground());
        } else
        {
            this.setBackground(table.getBackground());
            this.setForeground(table.getForeground());
        }

        return this;
    }
}

问候.