将 jRadioButton 添加到 jTable [英] Adding jRadioButton into jTable

问题描述

我正在尝试将 jRadioButton 添加到 jTable 中.我使用了给定的代码

I am trying to add jRadioButton into jTable. I used the given code

 private class CustomCellRenderer extends DefaultTableCellRenderer {

  /* (non-Javadoc)
   * @see javax.swing.table.DefaultTableCellRenderer#getTableCellRendererComponent(javax.swing.JTable, java.lang.Object, boolean, boolean, int, int)
   */

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


    return new javax.swing.JRadioButton();
  }

 }

但是当我运行它时，我得到了不同颜色的 jTable 列，当我点击单选按钮时没有任何反应.我正在使用 netbeans.如果我尝试自定义 jTable，那么 jTable 中将不会出现任何内容.给我适当的指导.

But when I run this I am getting jTable column in a different color and when I click on radio Button nothing happens. I am using netbeans. If I try to Customize the jTable then nothing will appear in jTable. Give me a proper guidance.

推荐答案

1. 如果要编辑表格单元格的值，必须设置一个TableCellEditor.
2. 您应该在渲染器中创建一个 JRadioButton 并在任何地方重用它，这就是 TableCellRenderer 的目的.
3. 如果不调用super.getTableCellRendererComponent，则不需要扩展DefaultTableCellRenderer，只需实现TableCellRenderer.

1. If you want to edit the value of a table cell, you must set a TableCellEditor.
2. You should create a single JRadioButton in your renderer and reuse it everywhere, that is the purpose of TableCellRenderer.
3. If you are not calling super.getTableCellRendererComponent, it is not need to extend DefaultTableCellRenderer, simply implement TableCellRenderer.

考虑阅读 JTable 教程以更好地理解概念渲染器和编辑器.

Consider reading the JTable tutorial to understand better the concepts of renderers and editors.

这里有一个示例，说明如何进行这项工作.当然，您必须适应您的模型，但您应该了解要点:

Here is an example on how you can make this work. Of course, you'll have to adapt to your model but you should get the gist:

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
import java.util.ArrayList;
import java.util.List;

import javax.swing.AbstractCellEditor;
import javax.swing.JFrame;
import javax.swing.JRadioButton;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableColumn;

public class TestTable {

    public class RadioButtonCellEditorRenderer extends AbstractCellEditor implements TableCellRenderer, TableCellEditor, ActionListener {

        private JRadioButton radioButton;

        public RadioButtonCellEditorRenderer() {
            this.radioButton = new JRadioButton();
            radioButton.addActionListener(this);
            radioButton.setOpaque(false);
        }

        @Override
        public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
            radioButton.setSelected(Boolean.TRUE.equals(value));
            return radioButton;
        }

        @Override
        public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
            radioButton.setSelected(Boolean.TRUE.equals(value));
            return radioButton;
        }

        @Override
        public void actionPerformed(ActionEvent e) {
            stopCellEditing();
        }

        @Override
        public Object getCellEditorValue() {
            return radioButton.isSelected();
        }

    }

    private JFrame f;
    private JTable table;

    private class MyObjectManager {
        private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(this);
        private List<MyObject> objects = new ArrayList<TestTable.MyObject>();

        public void addObject(MyObject object) {
            objects.add(object);
            object.setManager(this);
            propertyChangeSupport.firePropertyChange("objects", null, object);
        }

        public List<MyObject> getObjects() {
            return objects;
        }

        public void setAsSelected(MyObject myObject) {
            for (MyObject o : objects) {
                o.setSelected(myObject == o);
            }
        }
    }

    private class MyObject {
        private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(this);

        private MyObjectManager manager;

        private String value;

        private boolean selected;

        public MyObject(String value) {
            this.value = value;
        }

        public PropertyChangeSupport getPropertyChangeSupport() {
            return propertyChangeSupport;
        }

        public String getValue() {
            return value;
        }

        public void setValue(String value) {
            this.value = value;
            propertyChangeSupport.firePropertyChange("value", null, value);
        }

        public MyObjectManager getManager() {
            return manager;
        }

        public void setManager(MyObjectManager manager) {
            this.manager = manager;
            propertyChangeSupport.firePropertyChange("manager", null, manager);
        }

        public boolean isSelected() {
            return selected;
        }

        public void setSelected(boolean selected) {
            if (this.selected != selected) {
                this.selected = selected;
                if (selected) {
                    manager.setAsSelected(this);
                }
                propertyChangeSupport.firePropertyChange("selected", !selected, selected);
            }
        }

    }

    protected void initUI() {
        MyObjectManager manager = new MyObjectManager();
        for (int i = 0; i < 200; i++) {
            MyObject object = new MyObject("Row " + (i + 1));
            manager.addObject(object);
        }
        table = new JTable(new MyTableModel(manager));
        table.setRowHeight(20);
        TableColumn column = table.getColumnModel().getColumn(1);
        column.setCellEditor(new RadioButtonCellEditorRenderer());
        column.setCellRenderer(new RadioButtonCellEditorRenderer());
        f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.add(new JScrollPane(table), BorderLayout.CENTER);
        f.pack();
        f.setVisible(true);

    }

    public class MyTableModel extends AbstractTableModel implements PropertyChangeListener {

        private final MyObjectManager manager;

        public MyTableModel(MyObjectManager manager) {
            super();
            this.manager = manager;
            manager.propertyChangeSupport.addPropertyChangeListener(this);
            for (MyObject object : manager.getObjects()) {
                object.getPropertyChangeSupport().addPropertyChangeListener(this);
            }
        }

        @Override
        public void propertyChange(PropertyChangeEvent evt) {
            if (evt.getSource() == manager) {
                // OK, not the cleanest thing, just to get the gist of it.
                if (evt.getPropertyName().equals("objects")) {
                    ((MyObject) evt.getNewValue()).getPropertyChangeSupport().addPropertyChangeListener(this);
                }
                fireTableDataChanged();
            } else if (evt.getSource() instanceof MyObject) {
                int index = manager.getObjects().indexOf(evt.getSource());
                fireTableRowsUpdated(index, index);
            }
        }

        @Override
        public int getColumnCount() {
            return 2;
        }

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

        public MyObject getValueAt(int row) {
            return manager.getObjects().get(row);
        }

        @Override
        public Object getValueAt(int rowIndex, int columnIndex) {
            switch (columnIndex) {
            case 0:
                return getValueAt(rowIndex).getValue();
            case 1:
                return getValueAt(rowIndex).isSelected();
            }
            return null;
        }

        @Override
        public void setValueAt(Object value, int rowIndex, int columnIndex) {
            if (columnIndex == 1) {
                getValueAt(rowIndex).setSelected(Boolean.TRUE.equals(value));
            }
        }

        @Override
        public boolean isCellEditable(int rowIndex, int columnIndex) {
            return columnIndex == 1;
        }

        @Override
        public Class<?> getColumnClass(int column) {
            switch (column) {
            case 0:
                return String.class;
            case 1:
                return Boolean.class;
            }
            return Object.class;
        }

        @Override
        public String getColumnName(int column) {
            switch (column) {
            case 0:
                return "Value";
            case 1:
                return "Selected";
            }
            return null;
        }

    }

    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();
            }
        });
    }

}

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