passworddialog.java

Java生成PDF Java生成PDF Java生成PDF

// $Id: PasswordDialog.java,v 1.1 2006/08/03 11:35:43 mike Exp $

package org.faceless.pdf2.viewer;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import java.io.File;
import java.io.IOException;
import org.faceless.pdf2.PDFReader;

/**
 * Dialog to login to the specified PDF document.
 *
 * <p><i>
 * This code is copyright the Big Faceless Organization. You're welcome to
 * use, modify and distribute it in any form in your own projects, provided
 * those projects continue to make use of the Big Faceless PDF library.
 * </i></p>
 */
class PasswordDialog extends JDialog {

    private boolean isvalid = false;
    private JPasswordField passwordField;
    private PDFReader reader;
    private String password;

    public PasswordDialog(Frame parent, final File pdf) {
        super(parent, "Password", true);

        JPanel passwordPanel = new JPanel();
        passwordPanel.setBorder(new CompoundBorder(new EtchedBorder(EtchedBorder.RAISED),
                                               new EmptyBorder(5,5,5,5)));
        passwordPanel.add(new JLabel("Password:"));
        passwordField = new JPasswordField(16);
        passwordPanel.add(passwordField);

        JPanel p = new JPanel(new FlowLayout(FlowLayout.CENTER));
        p.setBorder(new EmptyBorder(10, 10, 10, 10));
        p.add(passwordPanel);

        ActionListener lst = new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                password = new String(passwordField.getPassword());
                try {
                    reader = new PDFReader(pdf,password);
                } catch(IOException e) {
                    JOptionPane.showMessageDialog(PasswordDialog.this,
                                "Invalid password", "Password Error",
                                JOptionPane.ERROR_MESSAGE);
                    passwordField.setText("");
                    return;		// Try one more time
                }
                isvalid = true;         // If we get here, login was successful
                dispose();
            }
        };

        JButton saveButton = new JButton("Password");
        saveButton.addActionListener(lst);
        getRootPane().setDefaultButton(saveButton);
        getRootPane().registerKeyboardAction(lst, KeyStroke.getKeyStroke(KeyEvent.VK_ENTER, 0),
                                             JComponent.WHEN_IN_FOCUSED_WINDOW);
        p.add(saveButton);

        JButton cancelButton = new JButton("Cancel");
        lst = new ActionListener() {
            public void actionPerformed(ActionEvent evt) {
                dispose();
            }
        };
        cancelButton.addActionListener(lst);
        getRootPane().registerKeyboardAction(lst, KeyStroke.getKeyStroke(KeyEvent.VK_ESCAPE, 0),
                                             JComponent.WHEN_IN_FOCUSED_WINDOW);
        p.add(cancelButton);

        getContentPane().add(p, BorderLayout.CENTER);

        setSize(new Dimension(300,135));
        setResizable(false);
        setLocationRelativeTo(parent);
        setVisible(true);
        pack();
    }

    boolean isValidPassword() {
        return isvalid;
    }

    PDFReader getReader() {
        return reader;
    }
}