突出显示 jtable 单元格的文本

Question

我正在尝试突出显示 jtable 单元格的文本。 这是我的代码： 当我在 testingHighlighter 方法中获取指定单元格的编辑器并尝试突出显示该编辑器组件中的文本时。请帮助我哪里错了。

public class test extends JFrame
{
    DefaultTableModel model;
    JTable table;
    String col[] = {"Name","Address","Phone","test"};

    public static void main(String args[])
    {
        test t = new test();
        t.start();
        t.testingHightligher();

    }

    public void start()
    {

         model = new DefaultTableModel(col,2); 
         table=new JTable(model){@Override
         public boolean isCellEditable(int arg0, int arg1) {

                return true;
            }};

        JScrollPane pane = new JScrollPane(table);

        setColumnEditor( table.getColumnModel().getColumn( 0 ), new Object[] { "AND",
            "OR" }, "Logical Operator" );


        Object[] objs = new Object[] { "==", "=" };
        setColumnEditor( table.getColumnModel().getColumn( 2 ), objs, "Logical Operator");

        JTextField field = new JTextField();
        DefaultCellEditor editor = new DefaultCellEditor( field );

        editor.setClickCountToStart( 1 );
        TableColumn col = table.getColumnModel().getColumn( 3 );

        col.setCellEditor( editor );

        DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();
        renderer.setToolTipText( "click to edit" );
        col.setCellRenderer( renderer );

        table.getColumnModel().getColumn( 0 ).setPreferredWidth( 25 );
        table.getColumnModel().getColumn( 1 ).setPreferredWidth( 120 );
        table.getColumnModel().getColumn( 2 ).setPreferredWidth( 25 );
        table.getColumnModel().getColumn( 3 ).setPreferredWidth( 100 );

        table.getTableHeader().setReorderingAllowed( false );

        table.setValueAt("csanuragjain",0,3);

        add(pane);
        setVisible(true);
        setSize(500,400);
        setLayout(new FlowLayout());
        setDefaultCloseOperation(EXIT_ON_CLOSE);
    }

    private void setColumnEditor( TableColumn col, Object[] editValues, String renderTip )
    {
        JComboBox comboBox = null;
        if( editValues != null )
        {
            comboBox = new JComboBox( editValues );
        }
        else
        {
            comboBox = new JComboBox();
        }

        comboBox.setMaximumRowCount( 6 );

        DefaultCellEditor editor = new DefaultCellEditor( comboBox );
        editor.setClickCountToStart( 2 );
        col.setCellEditor( editor );

        DefaultTableCellRenderer renderer = new DefaultTableCellRenderer();

        renderer.setToolTipText( renderTip );
        col.setCellRenderer( renderer );


        TableCellRenderer headerRenderer = col.getHeaderRenderer();
        if( headerRenderer instanceof DefaultTableCellRenderer )
        {
            ( (DefaultTableCellRenderer) headerRenderer ).setToolTipText( "test" );
        }
    }

    void testingHightligher()
    {
        Object value = table.getValueAt(0, 3);
        JTextField field = (JTextField) table.getColumnModel().getColumn( 3 ).getCellEditor().getTableCellEditorComponent(table, value, true, 0, 3);

        try
        {

            field.getHighlighter().addHighlight(0, 3, new javax.swing.text.DefaultHighlighter.DefaultHighlightPainter( Color.RED ));

        }
        catch(BadLocationException ex)
        {
            ex.printStackTrace();
        }
    }
}



Please help me where i am wrong..

Answer 1

接下来的问题是，您尝试在 TableCellEditor 中突出显示文本，您在编辑 JTable 的单元格时会看到该文本，但在那一刻您只看到 CellRenderer，您可以通过在开头添加 table.editCellAt(0, 3); 来修复您的代码testingHightligher() 方法。还可以像 main() 中的下一个代码一样调用您的测试：

SwingUtilities.invokeLater(new Runnable() {

        @Override
        public void run() {
              t.testingHightligher();
        }
});

如果您想在JTable 中突出显示未编辑的文本，则需要使用TableCellRenderer。 Here 是这个教程。

例子：

TableCellRenderer r = new TableCellRenderer() {
        JTextField f = new JTextField();

        @Override
        public Component getTableCellRendererComponent(JTable arg0, Object arg1, boolean arg2, boolean arg3, int arg4, int arg5) {
            if(arg1 != null){
                f.setText(arg1.toString());
                try {
                    f.getHighlighter().addHighlight(0,3,new javax.swing.text.DefaultHighlighter.DefaultHighlightPainter(Color.RED));
                } catch (BadLocationException e) {
                    e.printStackTrace();
                }
            } else {
                f.setText("");
                f.getHighlighter().removeAllHighlights();
            }
            return f;
        }
    };

你需要这样的东西，我也建议你在这里用JLabel替换JTextField，然后像written here一样高亮它

编辑：

这是给你的完整例子，它可以工作，观察和检查它：

 public class Form extends JFrame {

    private String textForSearch = "";
    private JTable t;

    public Form() {
        DefaultTableModel model;
        t = new JTable(model = new DefaultTableModel(new Object[][]{},new Object[]{1}));
        for(int i =0;i<10;i++){
            model.addRow(new Object[]{i});
        }
        for(int i =0;i<t.getColumnCount();i++){
            t.getColumnModel().getColumn(i).setCellRenderer(getRenderer());
        }

        JScrollPane jsp = new JScrollPane(t);
        final RightPanel right = new RightPanel();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        add(jsp, BorderLayout.CENTER);
        add(right, BorderLayout.EAST);
        pack();
        setLocationRelativeTo(null);
    }

    private TableCellRenderer getRenderer() {
        return new TableCellRenderer() {
            JTextField f = new JTextField();

            @Override
            public Component getTableCellRendererComponent(JTable arg0, Object arg1, boolean arg2, boolean arg3, int arg4, int arg5) {
                if(arg1 != null){
                    f.setText(arg1.toString());
                    String string = arg1.toString();
                    if(string.contains(textForSearch)){
                        int indexOf = string.indexOf(textForSearch);
                        try {
                            f.getHighlighter().addHighlight(indexOf,indexOf+textForSearch.length(),new javax.swing.text.DefaultHighlighter.DefaultHighlightPainter(Color.RED));
                        } catch (BadLocationException e) {
                            e.printStackTrace();
                        }
                    }
                } else {
                    f.setText("");
                    f.getHighlighter().removeAllHighlights();
                }
                return f;
            }
        };
    }

    public static void main(String[] args) throws Exception {
        SwingUtilities.invokeLater(new Runnable() {

            public void run() {
                new Form().setVisible(true);
            }
        });
    }

    class RightPanel extends JPanel{


        public RightPanel(){
            setLayout(new GridBagLayout());
            GridBagConstraints c = new GridBagConstraints();
            c.insets = new Insets(5, 5, 5, 5);
            c.gridy = 0;
            final JTextField f = new JTextField(5);
            add(f,c);
            JButton b = new JButton("search");
            b.addActionListener(new ActionListener() {

                @Override
                public void actionPerformed(ActionEvent arg0) {
                    textForSearch = f.getText();
                    t.repaint();
                }
            });
            c.gridy++;
            add(b,c);
        }
    }

}