Java – displays the pop-up JFrame under the JTable cell?

In the past few months, I have gained a lot of experience in jtables, and I have mastered actionlisteners and creative implementation But there's one thing I can't figure out

When you click a cell to edit a column, I want to pop up a small JFrame to manipulate the cell value, like JCombo@R_870_2419 @Same I've done everything, but I can't position the table completely below the JTable cell (technically, I want the lower left corner of the cell to be the upper left corner of the pop-up window. I try to use "getcellrect (..) "But it doesn't let me get the correct coordinates of the results or corners

So now I'm using mousepoint Getmouseponterinfo() to display a pop-up window with a mouse click in the cell But it's not ideal because I want it to be fixed under the cell instead of following the cursor

Any suggestions on how to do this?

Solution

Do not use JFrame The child window should be jdialog

Create a custom editor For example:

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

/*
 * The editor button that brings up the dialog.
 */
//public class TablePopupEditor extends AbstractCellEditor
public class TablePopupEditor extends DefaultCellEditor
    implements TableCellEditor
{
    private PopupDialog popup;
    private String currentText = "";
    private JButton editorComponent;

    public TablePopupEditor()
    {
        super(new JTextField());

        setClickCountToStart(1);

        //  Use a JButton as the editor component

        editorComponent = new JButton();
        editorComponent.setBackground(Color.white);
        editorComponent.setBorderPainted(false);
        editorComponent.setContentAreaFilled( false );

        // Make sure focus goes back to the table when the dialog is closed
        editorComponent.setFocusable( false );

        //  Set up the dialog where we do the actual editing

        popup = new PopupDialog();
    }

    public Object getCellEditorValue()
    {
        return currentText;
    }

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

        SwingUtilities.invokelater(new Runnable()
        {
            public void run()
            {
                popup.setText( currentText );
//              popup.setLocationRelativeTo( editorComponent );
                Point p = editorComponent.getLocationOnScreen();
                popup.setLocation(p.x,p.y + editorComponent.getSize().height);
                popup.show();
                fireEditingStopped();
            }
        });

        currentText = value.toString();
        editorComponent.setText( currentText );
        return editorComponent;
    }

    /*
    *   Simple dialog containing the actual editing component
    */
    class PopupDialog extends JDialog implements ActionListener
    {
        private JTextArea textArea;

        public PopupDialog()
        {
            super((Frame)null,"Change Description",true);

            textArea = new JTextArea(5,20);
            textArea.setLineWrap( true );
            textArea.setWrapStyleWord( true );
            Keystroke keystroke = Keystroke.getKeystroke("ENTER");
            textArea.getInputMap().put(keystroke,"none");
            JScrollPane scrollPane = new JScrollPane( textArea );
            getContentPane().add( scrollPane );

            JButton cancel = new JButton("Cancel");
            cancel.addActionListener( this );
            JButton ok = new JButton("Ok");
            ok.setPreferredSize( cancel.getPreferredSize() );
            ok.addActionListener( this );

            JPanel buttons = new JPanel();
            buttons.add( ok );
            buttons.add( cancel );
            getContentPane().add(buttons,BorderLayout.soUTH);
            pack();

            getRootPane().setDefaultButton( ok );
        }

        public void setText(String text)
        {
            textArea.setText( text );
        }

        /*
        *   Save the changed text before hiding the popup
        */
        public void actionPerformed(ActionEvent e)
        {
            if ("Ok".equals( e.getActionCommand() ) )
            {
                currentText = textArea.getText();
            }

            textArea.requestFocusInWindow();
            setVisible( false );
        }
    }

    private static void createAndShowUI()
    {
        String[] columnNames = {"Item","Description"};
        Object[][] data =
        {
            {"Item 1","Description of Item 1"},{"Item 2","Description of Item 2"},{"Item 3","Description of Item 3"}
        };

        JTable table = new JTable(data,columnNames);
        table.getColumnModel().getColumn(1).setPreferredWidth(300);
        table.setPreferredScrollableViewportSize(table.getPreferredSize());
        JScrollPane scrollPane = new JScrollPane(table);

        // Use the popup editor on the second column

        TablePopupEditor popupEditor = new TablePopupEditor();
        table.getColumnModel().getColumn(1).setCellEditor( popupEditor );

        JFrame frame = new JFrame("Popup Editor Test");
        frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
        frame.add(new JTextField(),BorderLayout.NORTH);
        frame.add( scrollPane );
        frame.pack();
        frame.setLocationRelativeTo( null );
        frame.setVisible(true);
    }

    public static void main(String[] args)
    {
        EventQueue.invokelater(new Runnable()
        {
            public void run()
            {
                createAndShowUI();
            }
        });
    }

}