Java tutorial
/* * * Copyright (C) 2008-2009 Yves Zoundi * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * under the License. */ package net.sf.vfsjfilechooser.accessories.connection; import net.sf.vfsjfilechooser.VFSJFileChooser; import net.sf.vfsjfilechooser.accessories.bookmarks.BookmarksDialog; import net.sf.vfsjfilechooser.accessories.bookmarks.TitledURLEntry; import net.sf.vfsjfilechooser.accessories.connection.Credentials.Builder; import net.sf.vfsjfilechooser.filechooser.PopupHandler; import net.sf.vfsjfilechooser.utils.VFSResources; import net.sf.vfsjfilechooser.utils.VFSUtils; import org.apache.commons.vfs.FileObject; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Component; import java.awt.Cursor; import java.awt.FlowLayout; import java.awt.Frame; import java.awt.GridBagConstraints; import java.awt.GridBagLayout; import java.awt.Insets; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.FocusAdapter; import java.awt.event.FocusEvent; import java.awt.event.ItemEvent; import java.awt.event.ItemListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.text.NumberFormat; import java.text.ParseException; import javax.swing.BorderFactory; import javax.swing.DefaultComboBoxModel; import javax.swing.JButton; import javax.swing.JComboBox; import javax.swing.JComponent; import javax.swing.JDialog; import javax.swing.JFormattedTextField; import javax.swing.JLabel; import javax.swing.JList; import javax.swing.JOptionPane; import javax.swing.JPanel; import javax.swing.JPasswordField; import javax.swing.JTextField; import javax.swing.plaf.basic.BasicComboBoxRenderer; /** * The connection dialog * @author Yves Zoundi <yveszoundi at users dot sf dot net> * @author Jojada Tirtowidjojo <jojada at users.sourceforge.net> * @version 0.0.1 */ @SuppressWarnings("serial") public final class ConnectionDialog extends JDialog { private static final String DIALOG_TITLE = VFSResources.getMessage("VFSJFileChooser.connectionButtonText"); private JLabel usernameLabel; private JLabel defaultRemotePathLabel; private JLabel passwordLabel; private JLabel protocolLabel; private JLabel portLabel; private JLabel hostnameLabel; private JTextField hostnameTextField; private JTextField defaultRemotePathTextField; private JTextField usernameTextField; private JPasswordField passwordTextField; private JFormattedTextField portTextField; private boolean isPortTextFieldDirty; private JComboBox protocolList; private JComponent buttonsPanel; private JButton connectButton; private DefaultComboBoxModel protocolModel; private JButton cancelButton; private JComponent centerPanel; private VFSJFileChooser fileChooser; private BookmarksDialog bookmarksDialog; private Thread currentWorker; /** * @param parent * @param m_dialog * @param chooser */ public ConnectionDialog(Frame parent, BookmarksDialog m_dialog, VFSJFileChooser chooser) { super(parent, DIALOG_TITLE, true); this.fileChooser = chooser; this.bookmarksDialog = m_dialog; initComponents(); initListeners(); } private void initComponents() { initCenterPanelComponents(); initBottomPanelComponents(); getContentPane().add(this.buttonsPanel, BorderLayout.SOUTH); getContentPane().add(this.centerPanel, BorderLayout.CENTER); pack(); } private void initCenterPanelComponents() { // create the panel this.centerPanel = new JPanel(new GridBagLayout()); this.centerPanel.setBorder(BorderFactory.createEmptyBorder(3, 3, 3, 3)); // create the components this.hostnameLabel = new JLabel(VFSResources.getMessage("VFSJFileChooser.hostnameLabelText")); this.hostnameLabel.setForeground(Color.RED); this.hostnameTextField = new JTextField(25); this.portLabel = new JLabel(VFSResources.getMessage("VFSJFileChooser.portLabelText")); this.portTextField = new JFormattedTextField(NumberFormat.getInstance()); this.isPortTextFieldDirty = false; this.protocolLabel = new JLabel(VFSResources.getMessage("VFSJFileChooser.protocolLabelText")); this.protocolModel = new DefaultComboBoxModel(Protocol.values()); this.protocolList = new JComboBox(protocolModel); this.protocolList.setRenderer(new ProtocolRenderer()); this.usernameLabel = new JLabel(VFSResources.getMessage("VFSJFileChooser.usernameLabelText")); this.usernameTextField = new JTextField(20); this.passwordLabel = new JLabel(VFSResources.getMessage("VFSJFileChooser.passwordLabelText")); this.passwordTextField = new JPasswordField(12); this.defaultRemotePathLabel = new JLabel(VFSResources.getMessage("VFSJFileChooser.pathLabelText")); this.defaultRemotePathTextField = new JTextField(20); // Add the components to the panel makeGridPanel(new Component[] { hostnameLabel, hostnameTextField, portLabel, portTextField, protocolLabel, protocolList, usernameLabel, usernameTextField, passwordLabel, passwordTextField, defaultRemotePathLabel, defaultRemotePathTextField }); } private void makeGridPanel(Component[] components) { final Insets insets = new Insets(5, 5, 5, 5); final GridBagConstraints gbc = new GridBagConstraints(); gbc.weightx = 1.0; gbc.weighty = 1.0; gbc.insets = insets; gbc.ipadx = 0; gbc.ipady = 0; gbc.anchor = GridBagConstraints.EAST; gbc.fill = GridBagConstraints.HORIZONTAL; int i = 0; int j = 0; for (Component component : components) { gbc.gridx = i; gbc.gridy = j; gbc.gridwidth = 1; gbc.gridheight = 1; centerPanel.add(component, gbc); i++; // 2 components per row if ((i % 2) == 0) { j++; i = 0; } } } private void initListeners() { this.portTextField.addKeyListener(new KeyAdapter() { @Override public void keyTyped(KeyEvent e) { char c = e.getKeyChar(); if (!((Character.isDigit(c) || (c == KeyEvent.VK_BACK_SPACE) || (c == KeyEvent.VK_DELETE)))) { getToolkit().beep(); e.consume(); } else { setPortTextFieldDirty(true); } } }); this.portTextField.addFocusListener(new FocusAdapter() { @Override public void focusLost(FocusEvent e) { JFormattedTextField f = (JFormattedTextField) e.getSource(); String text = f.getText(); if (text.length() == 0) { f.setValue(null); } try { f.commitEdit(); } catch (ParseException exc) { } } }); this.cancelButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { if (currentWorker != null) { if (currentWorker.isAlive()) { currentWorker.interrupt(); setCursor(Cursor.getDefaultCursor()); } } setVisible(false); } }); this.connectButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { currentWorker = new Thread() { @Override public void run() { StringBuilder error = new StringBuilder(); FileObject fo = null; setCursor(Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR)); try { String m_username = usernameTextField.getText(); String m_defaultRemotePath = defaultRemotePathTextField.getText(); char[] m_password = passwordTextField.getPassword(); String m_hostname = hostnameTextField.getText(); String m_protocol = protocolList.getSelectedItem().toString(); int m_port = -1; if (portTextField.isEditValid() && (portTextField.getValue() != null)) { String s = portTextField.getValue().toString(); m_port = Integer.valueOf(s); } Builder credentialsBuilder = Credentials.newBuilder(m_hostname) .defaultRemotePath(m_defaultRemotePath).username(m_username) .password(m_password).protocol(m_protocol).port(m_port); Credentials credentials = credentialsBuilder.build(); String uri = credentials.toFileObjectURL(); if (isInterrupted()) { setPortTextFieldDirty(false); return; } fo = VFSUtils.resolveFileObject(uri); if ((fo != null) && !fo.exists()) { fo = null; } } catch (Exception err) { error.append(err.getMessage()); setCursor(Cursor.getDefaultCursor()); } if ((error.length() > 0) || (fo == null)) { error.delete(0, error.length()); error.append("Failed to connect!"); error.append("\n"); error.append("Please check parameters and try again."); JOptionPane.showMessageDialog(ConnectionDialog.this, error, "Error", JOptionPane.ERROR_MESSAGE); setCursor(Cursor.getDefaultCursor()); return; } if (isInterrupted()) { return; } fileChooser.setCurrentDirectory(fo); setCursor(Cursor.getDefaultCursor()); resetFields(); if (bookmarksDialog != null) { String bTitle = fo.getName().getBaseName(); if (bTitle.trim().equals("")) { bTitle = fo.getName().toString(); } String bURL = fo.getName().getURI(); bookmarksDialog.getBookmarks().add(new TitledURLEntry(bTitle, bURL)); bookmarksDialog.getBookmarks().save(); } setVisible(false); } }; currentWorker.setPriority(Thread.MIN_PRIORITY); currentWorker.start(); } }); // add the usual right click popup menu(copy, paste, etc.) PopupHandler.installDefaultMouseListener(hostnameTextField); PopupHandler.installDefaultMouseListener(portTextField); PopupHandler.installDefaultMouseListener(usernameTextField); PopupHandler.installDefaultMouseListener(passwordTextField); PopupHandler.installDefaultMouseListener(defaultRemotePathTextField); this.protocolList.addItemListener(new ItemListener() { public void itemStateChanged(ItemEvent e) { if (e.getStateChange() == ItemEvent.SELECTED) { selectPortNumber(); } } }); this.protocolList.setSelectedItem(Protocol.FTP); } private void selectPortNumber() { //Go and get default port number according to the selected protocol Protocol protocol = (Protocol) protocolList.getSelectedItem(); if (protocol.toString().equals("FILE")) { enableFields(false); this.isPortTextFieldDirty = false; return; } else { enableFields(true); } //if user types in a port number //or empties port number field //then do not set protocol's default port number if (isPortTextFieldDirty() && portTextField.isEditValid()) { return; } portTextField.setValue(protocol.getPort()); } private void setPortTextFieldDirty(boolean b) { this.isPortTextFieldDirty = b; } private boolean isPortTextFieldDirty() { return this.isPortTextFieldDirty; } private void enableFields(boolean b) { Component[] components = { hostnameLabel, hostnameTextField, usernameLabel, usernameTextField, passwordLabel, passwordTextField, portLabel, portTextField }; for (Component component : components) { component.setVisible(b); } } private void resetFields() { this.isPortTextFieldDirty = false; hostnameTextField.setText(""); protocolList.setSelectedItem(Protocol.FTP); usernameTextField.setText(""); passwordTextField.setText(""); defaultRemotePathTextField.setText(""); } private void initBottomPanelComponents() { this.buttonsPanel = new JPanel(new FlowLayout(FlowLayout.CENTER)); this.cancelButton = new JButton(VFSResources.getMessage("VFSJFileChooser.cancelButtonText")); this.connectButton = new JButton(VFSResources.getMessage("VFSJFileChooser.connectionButtonText")); this.buttonsPanel.add(this.connectButton); this.buttonsPanel.add(this.cancelButton); } private static class ProtocolRenderer extends BasicComboBoxRenderer { @Override public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) { if (isSelected) { setBackground(list.getSelectionBackground()); setForeground(list.getSelectionForeground()); if (-1 < index) { Protocol aProtocol = (Protocol) value; list.setToolTipText(aProtocol.getDescription()); } } else { setBackground(list.getBackground()); setForeground(list.getForeground()); } setFont(list.getFont()); setText((value == null) ? "" : value.toString()); return this; } } }