使用自定义TableModel使得isCellEditable为按钮单击时的特定行的true

Question

我有一张像上面这样的桌子.最初除按钮列以外的所有单元格都不可编辑.我使用自定义创建了表TableModel.我isCellEditable的自定义TableModel看起来像这样:

public boolean isCellEditable(int rowIndex, int columnIndex) { 
    //System.out.println("isCellEditable: " + rowIndex + " " + columnIndex);
    if(getColumnClass(columnIndex) == JButton.class)
        return true;
    else
        return false;
}

但是,当我单击每行的"编辑"按钮时,JDialog将弹出该行(通过JTable在此对话框中仅构建一行来构建一个.)我可以更新此JDialog表中的单元格值.然后在该行的相应单元格中更新它们.

只有当我的isCellEditable返回为true时,我才能在此处更新后成功更新主表的行.但这不应该发生.只有当我点击它然后我应该能够isCellEditable将行更改为可编辑和更新,然后使其不可编辑.

我看过以下帖子但无法实现.

Answer 1

XxxTableModel存储String.class用于JButton作为Renderer/ Editor对JTable

• 表按钮列

并为您的代码(基于)

• 按钮表示例

编辑

的DefaultTableModel

import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;

public class TableButton3 extends JFrame {

    private static final long serialVersionUID = 1L;
    private JTable table;

    public TableButton3() {
        String[] columnNames = {"Date", "String", "Decimal", "Remove"};
        Object[][] data = {
            {new Date(), "A", new Double(5.1), "Remove"}, {new Date(), "B", new Double(6.2), "Remove"},
            {new Date(), "C", new Double(7.3), "Remove"}, {new Date(), "D", new Double(8.4), "Remove"},
            {new Date(), "A", new Double(5.1), "Remove"}, {new Date(), "B", new Double(6.2), "Remove"},};
        DefaultTableModel model = new DefaultTableModel(data, columnNames){

            private static final long serialVersionUID = 1L;

            @Override//  Returning the Class of each column will allow different renderers to be used based on Class
            public Class getColumnClass(int column) {
                switch (column) {
                    case 0:
                        return Date.class;
                    case 2:
                        return Double.class;
                    default:
                        return String.class;
                }
                //return getValueAt(0, column).getClass();
            }
        };
        table = new JTable(model) ;
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        JScrollPane scrollPane = new JScrollPane(table);
        getContentPane().add(scrollPane);
        ButtonColumn buttonColumn = new ButtonColumn(table, delete, 3);
        buttonColumn.setMnemonic(KeyEvent.VK_D);
    }

    public static void main(String[] args) {
        TableButton3 frame = new TableButton3();
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }
    //
    private Action delete = new AbstractAction() {

        private static final long serialVersionUID = 1L;

        public void actionPerformed(ActionEvent e) {
            JTable table = (JTable) e.getSource();
            int modelRow = Integer.valueOf(e.getActionCommand());
            ((DefaultTableModel) table.getModel()).removeRow(modelRow);
            table.clearSelection();
        }
    };
}

AbstractTableModel上

import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.table.*;

public class TableButton3 extends JFrame {

    private static final long serialVersionUID = 1L;
    private JTable table;
    private MyTableModel myModel = new MyTableModel();

    public TableButton3() {
        String[] columnNames = {"Date", "String", "Decimal", "Remove"};
        Object[][] data = {
            {new Date(), "A", new Double(5.1), "Remove"}, {new Date(), "B", new Double(6.2), "Remove"},
            {new Date(), "C", new Double(7.3), "Remove"}, {new Date(), "D", new Double(8.4), "Remove"},
            {new Date(), "A", new Double(5.1), "Remove"}, {new Date(), "B", new Double(6.2), "Remove"},};
        DefaultTableModel model = new DefaultTableModel(data, columnNames){

            private static final long serialVersionUID = 1L;

            @Override//  Returning the Class of each column will allow different renderers to be used based on Class
            public Class getColumnClass(int column) {
                switch (column) {
                    case 0:
                        return Date.class;
                    case 2:
                        return Double.class;
                    default:
                        return String.class;
                }
                //return getValueAt(0, column).getClass();
            }
        };
        table = new JTable(model);
        table = new JTable(myModel);
        addTableDatas();
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane);
        ButtonColumn buttonColumn = new ButtonColumn(table, delete, 3);
        buttonColumn.setMnemonic(KeyEvent.VK_D);
    }

    public static void main(String[] args) {
        TableButton3 frame = new TableButton3();
        frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
        frame.pack();
        frame.setVisible(true);
    }

    private void addTableDatas() {
        Vector<String> columnNameS = new Vector<String>();
        columnNameS.add("Date");
        columnNameS.add("String");
        columnNameS.add("Decimal");
        columnNameS.add("Remove");
        myModel.setColumnNames(columnNameS);

        Vector<Object> row1 = new Vector<Object>();
        row1.add(new Date());
        row1.add("A");
        row1.add(new Double(5.1));
        row1.add("Remove");
        myModel.addRow(row1);

        row1 = new Vector<Object>();
        row1.add(new Date());
        row1.add("B");
        row1.add(new Double(6.2));
        row1.add("Remove");
        myModel.addRow(row1);

        row1 = new Vector<Object>();
        row1.add(new Date());
        row1.add("B");
        row1.add(new Double(8.4));
        row1.add("Remove");
        myModel.addRow(row1);

        row1 = new Vector<Object>();
        row1.add(new Date());
        row1.add("B");
        row1.add(new Double(5.1));
        row1.add("Remove");
        myModel.addRow(row1);

        row1 = new Vector<Object>();
        row1.add(new Date());
        row1.add("B");
        row1.add(new Double(6.2));
        row1.add("Remove");
        myModel.addRow(row1);
    }

    private class MyTableModel extends AbstractTableModel {

        private static final long serialVersionUID = 1L;
        private Vector<Vector<Object>> data;
        private Vector<String> colNames;
        private boolean[] _columnsVisible = {true, true, true, true};

        public MyTableModel() {
            this.colNames = new Vector<String>();
            this.data = new Vector<Vector<Object>>();
        }

        public MyTableModel(Vector<String> colnames) {
            this.colNames = colnames;
            this.data = new Vector<Vector<Object>>();
        }

        public void resetTable() {
            this.colNames.removeAllElements();
            this.data.removeAllElements();
        }

        public void setColumnNames(Vector<String> colNames) {
            this.colNames = colNames;
            this.fireTableStructureChanged();
        }

        public void addRow(Vector<Object> data) {
            this.data.add(data);
            this.fireTableRowsInserted(data.size() - 1, data.size() - 1);
        }

        public void removeRowAt(int row) {
            this.data.removeElementAt(row);
            this.fireTableRowsDeleted(row - 1, data.size() - 1);
        }

        @Override
        public int getColumnCount() {
            return this.colNames.size();
        }

        @Override
        public Class<?> getColumnClass(int colNum) {
            switch (colNum) {
                case 0:
                    return Date.class;
                case 2:
                    return Double.class;
                default:
                    return String.class;
            }
        }

        @Override
        public boolean isCellEditable(int row, int colNum) {
            switch (colNum) {
                default:
                    return true;
            }
        }

        @Override
        public String getColumnName(int colNum) {
            return this.colNames.get(colNum);
        }

        @Override
        public int getRowCount() {
            return this.data.size();
        }

        @Override
        public Object getValueAt(int row, int col) {
            Vector<Object> value = this.data.get(row);
            return value.get(col);
        }

        @Override
        public void setValueAt(Object newVal, int row, int col) {
            Vector<Object> aRow = data.elementAt(row);
            aRow.remove(col);
            aRow.insertElementAt(newVal, col);
            fireTableCellUpdated(row, col);
        }

        public void setColumnVisible(int index, boolean visible) {
            this._columnsVisible[index] = visible;
            this.fireTableStructureChanged();
        }
    }
    //
    private Action delete = new AbstractAction() {

        private static final long serialVersionUID = 1L;

        public void actionPerformed(ActionEvent e) {
            JTable table = (JTable) e.getSource();
            int modelRow = Integer.valueOf(e.getActionCommand());
            ((DefaultTableModel) table.getModel()).removeRow(modelRow);
            table.clearSelection();
        }
    };
}

两者都返回相同的GUI,具有相同的...