Java tutorial
/* * jMemorize - Learning made easy (and fun) - A Leitner flashcards tool * Copyright(C) 2004-2008 Riad Djemili and contributors * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 1, or (at your option) * any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ package jmemorize.gui.swing.dialogs; import java.awt.BorderLayout; import java.awt.Dimension; import java.awt.Frame; import java.awt.Toolkit; import java.awt.datatransfer.Clipboard; import java.awt.datatransfer.ClipboardOwner; import java.awt.datatransfer.StringSelection; import java.awt.datatransfer.Transferable; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.PrintWriter; import java.io.StringWriter; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JDialog; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JScrollPane; import javax.swing.JTextArea; import javax.swing.border.EmptyBorder; import javax.swing.border.EtchedBorder; import jmemorize.core.Main; import jmemorize.gui.LC; import jmemorize.gui.Localization; import com.jgoodies.forms.builder.ButtonBarBuilder; import com.jgoodies.forms.builder.DefaultFormBuilder; import com.jgoodies.forms.layout.CellConstraints; import com.jgoodies.forms.layout.FormLayout; /** * A dialog that can be displayed when an exception occurs. * * @author djemili */ public class ErrorDialog extends JDialog { private JButton m_okayButton = new JButton(); private JButton m_moreButton = new JButton(); private JButton m_copyButton = new JButton(); private Exception m_exception; private JTextArea m_stacktraceArea; private JScrollPane m_scrollPane; private boolean m_extended = false; private String m_message; private String m_debugText; private JPanel m_placeholderPanel; /** * Creates a new modal error dialog that shows given the message associated * with given exception and also the stack trace if extended. */ public ErrorDialog(Frame owner, Exception cause) { this(owner, cause.getMessage(), cause); } /** * Creates a new modal error dialog that shows given message and if extended * also the stack trace of given exception. * * @param message the message that should appear instead of the message * given by the exception. */ public ErrorDialog(Frame owner, String message, Exception cause) { super(owner, Localization.get("MainFrame.ERROR_TITLE"), true); m_message = message; m_exception = cause; Main.logThrowable(message, cause); Main.clearLastThrowable(); initComponents(); pack(); setLocationRelativeTo(owner); } private static String getDebugText(Exception e) { String java = System.getProperty("java.version"); //$NON-NLS-1$ String os = System.getProperty("os.name"); //$NON-NLS-1$ String version = Main.PROPERTIES.getProperty("project.version"); //$NON-NLS-1$ // String revision = Main.PROPERTIES.getProperty("project.revision"); //$NON-NLS-1$ String revision = ""; // HACK String buildId = Main.PROPERTIES.getProperty("buildId");//$NON-NLS-1$ String txt = String.format("Ver %s %s (%s) - Java %s , OS %s%n", version, revision, buildId, java, os); txt += getStackTrace(e); return txt; } private static String getStackTrace(Exception e) { StringWriter sw = new StringWriter(); e.printStackTrace(new PrintWriter(sw)); return sw.toString(); } private void initComponents() { getContentPane().add(buildMainPanel(), BorderLayout.CENTER); getContentPane().add(buildButtonBar(), BorderLayout.SOUTH); } private JPanel buildMainPanel() { // build button bar FormLayout layout = new FormLayout("3dlu, p:grow, 3dlu", // columns //$NON-NLS-1$ "p, 3dlu, fill:p:grow, 3dlu"); // rows //$NON-NLS-1$ CellConstraints cc = new CellConstraints(); DefaultFormBuilder builder = new DefaultFormBuilder(layout); builder.setBorder(new EmptyBorder(4, 5, 2, 5)); JLabel textLabel = builder.addLabel("<html>" + m_message + "</html>", cc.xy(2, 1)); textLabel.setIcon(new ImageIcon(getClass().getResource("/resource/icons/warn.gif"))); //$NON-NLS-1$ textLabel.setBorder(new EmptyBorder(20, 10, 20, 10)); textLabel.setPreferredSize(new Dimension(500, 90)); textLabel.setFont(textLabel.getFont().deriveFont(16.0f)); m_debugText = getDebugText(m_exception); m_stacktraceArea = new JTextArea(m_debugText); m_stacktraceArea.setEditable(false); m_scrollPane = new JScrollPane(m_stacktraceArea); m_scrollPane.setPreferredSize(new Dimension(500, 300)); m_placeholderPanel = new JPanel(new BorderLayout()); builder.add(m_placeholderPanel, cc.xy(2, 3)); builder.setBorder(new EtchedBorder()); return builder.getPanel(); } private JPanel buildButtonBar() { // buttons m_okayButton = new JButton(Localization.get(LC.OKAY)); m_okayButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { dispose(); } }); m_moreButton = new JButton("Show debug information"); m_moreButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { extendDialog(); } }); m_copyButton = new JButton("Copy to clipboard"); m_copyButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { copyDebugTextToClipboard(); } }); ButtonBarBuilder builder = new ButtonBarBuilder(); builder.addFixed(m_moreButton); builder.addRelatedGap(); builder.addGridded(m_copyButton); builder.addRelatedGap(); builder.addGlue(); builder.addUnrelatedGap(); builder.addGridded(m_okayButton); builder.setBorder(new EmptyBorder(3, 3, 3, 3)); return builder.getPanel(); } private void extendDialog() { if (!m_extended) m_placeholderPanel.add(m_scrollPane, BorderLayout.CENTER); else m_placeholderPanel.remove(m_scrollPane); m_extended = !m_extended; m_moreButton.setSelected(m_extended); pack(); } private void copyDebugTextToClipboard() { Toolkit toolkit = Toolkit.getDefaultToolkit(); Clipboard clipboard = toolkit.getSystemClipboard(); StringSelection ss = new StringSelection(m_debugText); clipboard.setContents(ss, new ClipboardOwner() { public void lostOwnership(Clipboard clipboard, Transferable contents) { // ignore } }); } }