invoicepopup.java

java编程开发技巧与实例的编译测试通过的所有例程

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

public class InvoicePopup extends MouseAdapter implements ActionListener
{
	private JPopupMenu	menu	=	new	JPopupMenu("Table option");
	private JMenuItem	add		=	new JMenuItem("add item");
	private JMenuItem	del		=	new JMenuItem("delete item");
	private JMenuItem	mod		=	new JMenuItem("modify item");
	private Invoicer parent		=	null;
	public InvoicePopup(Invoicer _parent)
	{
		parent	=	_parent;
		menu.add(add);
		add.addActionListener(this);
		menu.add(mod);
		add.addActionListener(this);
		menu.add(mod);
		add.addActionListener(this);
		menu.add(new JPopupMenu.Separator());
		menu.add(del);
		del.addActionListener(this);
	}
	public void mousePressed(MouseEvent me)
	{
		if (SwingUtilities.isRightMouseButton(me))
			menu.show(parent.table, me.getX(), me.getY());
	}
	public void actionPerformed(ActionEvent ae)
	{
		if (ae.getSource() == add)
			add();
		else if (ae.getSource() == del)
			delete();
		else if (ae.getSource() == mod)
			modify();
	}
	private void delete()
	{
		int row	=	parent.table.getSelectedRow();
		if (row >= 0)
		{
			String msg	=	"Delete '" + parent.data.getValueAt(row, 1) + "'?";
			if (JOptionPane.showConfirmDialog(parent, msg, "Confirm deletion",
					JOptionPane.OK_CANCEL_OPTION, JOptionPane.WARNING_MESSAGE) == JOptionPane.YES_OPTION)
			{
				parent.data.removeRow(row);
				parent.price.setText("$" + parent.total());
			}
		}
	}
	private void add()
	{
		InvoicePanel invoice	=	new InvoicePanel();
		if (JOptionPane.showOptionDialog(parent, invoice, "New invoice item",
				JOptionPane.OK_CANCEL_OPTION,
				JOptionPane.QUESTION_MESSAGE,
				null, null, null) == JOptionPane.YES_OPTION)
		{
			try
			{
				parent.data.addRow(invoice.getData());
				parent.price.setText("$" + parent.total());
			}
			catch	(NumberFormatException nfe)
			{
				JOptionPane.showMessageDialog(parent, "Invalid numeric format", "Error Message", JOptionPane.ERROR_MESSAGE);
			}
		}
	}
	private void modify()
	{
		InvoicePanel invoice	=	new InvoicePanel();
		int row	=	parent.table.getSelectedRow();
		if (row >= 0)
		{
			String data[] =	new String[4];
			for (int i = 0; i < data.length; i ++)
				data[i]	=	parent.data.getValueAt(row, 1).toString();
			invoice.setData(data);
			if (JOptionPane.showOptionDialog(parent, invoice, "Change item",
					JOptionPane.OK_CANCEL_OPTION,
					JOptionPane.WARNING_MESSAGE,
					null, null, null) == JOptionPane.YES_OPTION)
			{
				try
				{
					for (int i = 0; i < invoice.getData().length; i ++)
						parent.data.setValueAt(invoice.getData()[i], row, i);
					parent.price.setText("$" + parent.total());
				}
				catch	(NumberFormatException nfe)
				{
					JOptionPane.showMessageDialog(parent, "Invalid number",
							"Error message", JOptionPane.ERROR_MESSAGE);
				}
			}
		}
	}
}