Check for updates on startup (configurable)

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-over/trunk@506 174cde9d-5d70-4d2a-aa98-46368bc2aaf7

13 files changed, 232 insertions, 33 deletions

diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/Constants.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/Constants.java
index aae15703..3b848647 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/Constants.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/Constants.java
@@ -77,6 +77,15 @@ public class Constants {
 	/** PDF-Over User Agent string */
 	public static final String USER_AGENT_STRING = "PDF-Over " + (APP_VERSION == null ? "4.0" : APP_VERSION); //$NON-NLS-1$ //$NON-NLS-2$
 
+	/** Current release file */
+	public static final String CURRENT_RELEASE_URL = "http://webstart.buergerkarte.at/PDF-Over/Release.txt"; //$NON-NLS-1$
+
+	/** Update URL */
+	public static final String UPDATE_URL = "http://webstart.buergerkarte.at/PDF-Over/"; //$NON-NLS-1$
+
+	/** False */
+	public static final String FALSE = "false"; //$NON-NLS-1$
+
 
 	/* Configuration parameters */
 
@@ -118,6 +127,9 @@ public class Constants {
 	/** The signature locale config parameter */
 	public static final String CFG_SIGN_LOCALE = "SIGNLOCALE"; //$NON-NLS-1$
 
+	/** The update check config parameter */
+	public static final String CFG_UPDATE_CHECK = "UPDATE_CHECK"; //$NON-NLS-1$
+
 	/** The proxy host config parameter */
 	public static final String CFG_PROXY_HOST = "PROXY_HOST"; //$NON-NLS-1$
 
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/AdvancedConfigurationComposite.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/AdvancedConfigurationComposite.java
index d7870f6a..548d5767 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/AdvancedConfigurationComposite.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/AdvancedConfigurationComposite.java
@@ -70,21 +70,28 @@ public class AdvancedConfigurationComposite extends BaseConfigurationComposite {
 	 **/
 	private static final Logger log = LoggerFactory
 			.getLogger(AdvancedConfigurationComposite.class);
-	Text txtOutputFolder;
-	Combo cmbBKUAuswahl;
-	Combo cmbLocaleAuswahl;
-	String[] bkuStrings;
+
+	private Group grpSignatur;
 	Button btnAutomatischePositionierung;
+	private Label lblTransparenz;
+	private Label lblTransparenzLinks;
+	private Label lblTransparenzRechts;
 	Scale sclTransparenz;
-	private Group grpSignatur;
-	private Group grpLocaleAuswahl;
-	private Button btnBrowse;
-	private Label lblDefaultOutputFolder;
-	private Group grpSpeicherort;
+
 	private Group grpBkuAuswahl;
-	private Label lblTransparenzRechts;
-	private Label lblTransparenzLinks;
-	private Label lblTransparenz;
+	Combo cmbBKUAuswahl;
+	String[] bkuStrings;
+
+	private Group grpSpeicherort;
+	private Label lblDefaultOutputFolder;
+	Text txtOutputFolder;
+	private Button btnBrowse;
+
+	private Group grpLocaleAuswahl;
+	Combo cmbLocaleAuswahl;
+
+	private Group grpUpdateCheck;
+	Button btnUpdateCheck;
 
 	private Group grpProxy;
 	private Label lblProxyHost;
@@ -147,7 +154,6 @@ public class AdvancedConfigurationComposite extends BaseConfigurationComposite {
 
 		this.btnAutomatischePositionierung
 				.addSelectionListener(new SelectionAdapter() {
-
 					@Override
 					public void widgetSelected(SelectionEvent e) {
 						AdvancedConfigurationComposite.this
@@ -155,7 +161,6 @@ public class AdvancedConfigurationComposite extends BaseConfigurationComposite {
 										.getSelection());
 					}
 				});
-		log.debug(this.btnAutomatischePositionierung.getBounds().toString());
 
 		this.lblTransparenz = new Label(this.grpSignatur, SWT.HORIZONTAL);
 		FormData fd_lblTransparenz = new FormData();
@@ -403,10 +408,51 @@ public class AdvancedConfigurationComposite extends BaseConfigurationComposite {
 			}
 		});
 
+		this.grpUpdateCheck = new Group(this, SWT.NONE);
+		FormLayout layout_grpUpdateCheck = new FormLayout();
+		layout_grpUpdateCheck.marginHeight = 10;
+		layout_grpUpdateCheck.marginWidth = 5;
+		this.grpUpdateCheck.setLayout(layout_grpUpdateCheck);
+		FormData fd_grpUpdateCheck = new FormData();
+		fd_grpUpdateCheck.top = new FormAttachment(this.grpLocaleAuswahl, 5);
+		fd_grpUpdateCheck.left = new FormAttachment(0, 5);
+		fd_grpUpdateCheck.right = new FormAttachment(100, -5);
+		this.grpUpdateCheck.setLayoutData(fd_grpUpdateCheck);
+
+		FontData[] fD_grpUpdateCheck = this.grpUpdateCheck.getFont().getFontData();
+		fD_grpUpdateCheck[0].setHeight(Constants.TEXT_SIZE_NORMAL);
+		this.grpUpdateCheck.setFont(new Font(Display.getCurrent(),
+				fD_grpUpdateCheck[0]));
+
+		this.btnUpdateCheck = new Button(this.grpUpdateCheck, SWT.CHECK);
+		FormData fd_btnUpdateCheck = new FormData();
+		fd_btnUpdateCheck.right = new FormAttachment(100, -5);
+		fd_btnUpdateCheck.top = new FormAttachment(0);
+		fd_btnUpdateCheck.left = new FormAttachment(0, 5);
+		this.btnUpdateCheck
+				.setLayoutData(fd_btnUpdateCheck);
+
+		FontData[] fD_btnUpdateCheck = this.btnUpdateCheck
+				.getFont().getFontData();
+		fD_btnUpdateCheck[0]
+				.setHeight(Constants.TEXT_SIZE_BUTTON);
+		this.btnUpdateCheck.setFont(new Font(Display
+				.getCurrent(), fD_btnUpdateCheck[0]));
+
+		this.btnUpdateCheck
+				.addSelectionListener(new SelectionAdapter() {
+					@Override
+					public void widgetSelected(SelectionEvent e) {
+						AdvancedConfigurationComposite.this
+								.performUpdateCheckSelection(AdvancedConfigurationComposite.this.btnUpdateCheck
+										.getSelection());
+					}
+				});
+
 		this.grpProxy = new Group(this, SWT.NONE);
 		FormData fd_grpProxy = new FormData();
 		fd_grpProxy.right = new FormAttachment(100, -5);
-		fd_grpProxy.top = new FormAttachment(this.grpLocaleAuswahl, 5);
+		fd_grpProxy.top = new FormAttachment(this.grpUpdateCheck, 5);
 		fd_grpProxy.left = new FormAttachment(0, 5);
 		this.grpProxy.setLayoutData(fd_grpProxy);
 		this.grpProxy.setLayout(new GridLayout(2, false));
@@ -733,6 +779,11 @@ public class AdvancedConfigurationComposite extends BaseConfigurationComposite {
 		this.configurationContainer.setPlaceholderTransparency(transparency);
 	}
 
+	void performUpdateCheckSelection(boolean checkUpdate) {
+		this.configurationContainer.setUpdateCheck(checkUpdate);
+		this.btnUpdateCheck.setSelection(checkUpdate);
+	}
+
 	void processProxyHostChanged() {
 		try {
 			this.proxyHostErrorMarker.setVisible(false);
@@ -851,6 +902,7 @@ public class AdvancedConfigurationComposite extends BaseConfigurationComposite {
 		this.sclTransparenz.setSelection(this.configurationContainer
 				.getPlaceholderTransparency());
 		this.performLocaleSelectionChanged(this.configurationContainer.getLocale());
+		this.performUpdateCheckSelection(this.configurationContainer.getUpdateCheck());
 
 		int port = this.configurationContainer.getProxyPort();
 		if (port > 0) {
@@ -949,6 +1001,13 @@ public class AdvancedConfigurationComposite extends BaseConfigurationComposite {
 		this.cmbLocaleAuswahl.setToolTipText(Messages
 				.getString("advanced_config.LocaleSelection_ToolTip")); //$NON-NLS-1$
 
+		this.grpUpdateCheck.setText(Messages
+				.getString("advanced_config.UpdateCheck_Title")); //$NON-NLS-1$
+		this.btnUpdateCheck.setText(Messages
+				.getString("advanced_config.UpdateCheck")); //$NON-NLS-1$
+		this.btnUpdateCheck.setToolTipText(Messages
+				.getString("advanced_config.UpdateCheck_ToolTip")); //$NON-NLS-1$
+
 		this.grpProxy.setText(Messages.getString("advanced_config.Proxy_Title")); //$NON-NLS-1$
 		this.lblProxyHost.setText(Messages.getString("advanced_config.ProxyHost")); //$NON-NLS-1$
 		this.txtProxyHost.setToolTipText(Messages
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/BaseConfigurationComposite.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/BaseConfigurationComposite.java
index 21520a4f..d341a9d3 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/BaseConfigurationComposite.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/BaseConfigurationComposite.java
@@ -67,12 +67,12 @@ public abstract class BaseConfigurationComposite extends StateComposite {
 		super(parent, style, state);
 		this.configurationContainer = configuration;
 	}
-	
+
 	/**
 	 * Load configuration from ConfigurationContainer
 	 */
 	public abstract void loadConfiguration();
-	
+
 	/**
 	 * Called before exit.
 	 * The method validates every setting in the configuration before exit
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/ConfigurationComposite.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/ConfigurationComposite.java
index e7b3d1c6..2f8abadb 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/ConfigurationComposite.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/composites/ConfigurationComposite.java
@@ -277,7 +277,6 @@ public class ConfigurationComposite extends StateComposite {
 	public void setConfigProvider(PersistentConfigProvider provider) {
 		this.configProvider = provider;
 		if (this.configProvider != null) {
-
 			// Initialize Configuration Container
 			this.configurationContainer
 						.setDefaultSignaturePosition(this.configProvider
@@ -312,6 +311,9 @@ public class ConfigurationComposite extends StateComposite {
 			this.configurationContainer.setOutputFolder(this.configProvider
 					.getDefaultOutputFolderPersistent());
 
+			this.configurationContainer.setUpdateCheck(this.configProvider.
+					getUpdateCheck());
+
 			this.configurationContainer.setProxyHost(this.configProvider
 					.getProxyHostPersistent());
 			try {
@@ -421,6 +423,9 @@ public class ConfigurationComposite extends StateComposite {
 		this.configManipulator.setSignatureNote(this.configurationContainer
 				.getSignatureNote());
 
+		this.configManipulator.setUpdateCheck(this.configurationContainer
+				.getUpdateCheck());
+
 		String hostOld = this.configProvider.getProxyHostPersistent();
 		String hostNew = this.configurationContainer.getProxyHost();
 		if (hostOld != null && !hostOld.isEmpty() &&
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigManipulator.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigManipulator.java
index 68b48242..d04d59c1 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigManipulator.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigManipulator.java
@@ -112,6 +112,12 @@ public interface ConfigManipulator {
 	public void setSignLocale(Locale locale);
 
 	/**
+	 * Sets whether to automatically check for application updates
+	 * @param checkUpdate whether to automatically check for application updates
+	 */
+	public void setUpdateCheck(boolean checkUpdate);
+
+	/**
 	 * Sets the default main window size
 	 * @param size a Point describing the size
 	 */
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigProvider.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigProvider.java
index 91bd5ecf..0e3bda77 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigProvider.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigProvider.java
@@ -151,6 +151,12 @@ public interface ConfigProvider {
 	public Locale getSignLocale();
 
 	/**
+	 * Gets whether to automatically check for application updates
+	 * @return whether to automatically check for application updates
+	 */
+	public boolean getUpdateCheck();
+
+	/**
 	 * Gets the configured MainWindow size
 	 * @return the configured MainWindow size
 	 */
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigProviderImpl.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigProviderImpl.java
index 3010868b..0d860ea0 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigProviderImpl.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigProviderImpl.java
@@ -86,45 +86,45 @@ public class ConfigProviderImpl implements ConfigProvider, ConfigManipulator,
 		config.load(configSource);
 
 		// Set Emblem
-		this.setDefaultEmblem(config
+		setDefaultEmblem(config
 				.getProperty(Constants.CFG_EMBLEM));
 
 		// Set Mobile Phone Number
-		this.setDefaultMobileNumber(config
+		setDefaultMobileNumber(config
 				.getProperty(Constants.CFG_MOBILE_NUMBER));
 
 		// Set signature note
-		this.setSignatureNote(config
+		setSignatureNote(config
 				.getProperty(Constants.CFG_SIGNATURE_NOTE));
 
 		// Set Proxy Host
-		this.setProxyHost(config
+		setProxyHost(config
 				.getProperty(Constants.CFG_PROXY_HOST));
 
 		// Set Proxy User
-		this.setProxyUser(config
+		setProxyUser(config
 				.getProperty(Constants.CFG_PROXY_USER));
 
 		// Set Proxy Password
-		this.setProxyPass(config
+		setProxyPass(config
 				.getProperty(Constants.CFG_PROXY_PASS));
 
 		// Set Output Folder
-		this.setDefaultOutputFolder(config
+		setDefaultOutputFolder(config
 				.getProperty(Constants.CFG_OUTPUT_FOLDER));
 
 		String localeString = config.getProperty(Constants.CFG_LOCALE);
 		
 		Locale targetLocale = LocaleSerializer.parseFromString(localeString);
 		if (targetLocale != null) {
-			this.setLocale(targetLocale);
+			setLocale(targetLocale);
 		}
 		
 		String signlocalString = config.getProperty(Constants.CFG_SIGN_LOCALE);
 		
 		Locale signtargetLocale = LocaleSerializer.parseFromString(signlocalString);
 		if (signtargetLocale != null) {
-			this.setSignLocale(signtargetLocale);
+			setSignLocale(signtargetLocale);
 		}
  		
 		String bkuUrl = config
@@ -155,7 +155,7 @@ public class ConfigProviderImpl implements ConfigProvider, ConfigManipulator,
 			int port = Integer.parseInt(proxyPortString);
 
 			if (port > 0 && port <= 0xFFFF) {
-				this.setProxyPort(port);
+				setProxyPort(port);
 			} else {
 				log.warn("Proxy port is out of range!: " + port); //$NON-NLS-1$
 			}
@@ -175,7 +175,7 @@ public class ConfigProviderImpl implements ConfigProvider, ConfigManipulator,
 				defaultBKU = BKUs.NONE;
 			}
 		}
-		this.setDefaultBKU(defaultBKU);
+		setDefaultBKU(defaultBKU);
 
 		// Set Signature placeholder transparency
 		int transparency = Constants.DEFAULT_SIGNATURE_PLACEHOLDER_TRANSPARENCY;
@@ -188,7 +188,7 @@ public class ConfigProviderImpl implements ConfigProvider, ConfigManipulator,
 				// ignore parsing exception
 			}
 		}
-		this.setPlaceholderTransparency(transparency);
+		setPlaceholderTransparency(transparency);
 
 		// Set MainWindow size
 		int width = Constants.DEFAULT_MAINWINDOW_WIDTH;
@@ -264,7 +264,12 @@ public class ConfigProviderImpl implements ConfigProvider, ConfigManipulator,
 				log.error("Signature Position read from config failed: not matching string"); //$NON-NLS-1$
 			}
 		}
-		this.setDefaultSignaturePosition(position);
+		setDefaultSignaturePosition(position);
+
+		// Set update check
+		String updateCheck = config.getProperty(Constants.CFG_UPDATE_CHECK);
+		if (updateCheck != null)
+			setUpdateCheck(!updateCheck.equalsIgnoreCase(Constants.FALSE));
 	}
 
 	/*
@@ -332,6 +337,9 @@ public class ConfigProviderImpl implements ConfigProvider, ConfigManipulator,
 		if (Constants.THEME != Constants.Themes.DEFAULT)
 			props.setProperty(Constants.CFG_THEME, Constants.THEME.name());
 
+		if (!getUpdateCheck())
+			props.setProperty(Constants.CFG_UPDATE_CHECK, Constants.FALSE);
+
 		FileOutputStream outputstream = new FileOutputStream(configFile, false);
 
 		props.store(outputstream, "Configuration file was generated!"); //$NON-NLS-1$
@@ -1014,6 +1022,22 @@ public class ConfigProviderImpl implements ConfigProvider, ConfigManipulator,
 	}
 
 	/* (non-Javadoc)
+	 * @see at.asit.pdfover.gui.workflow.config.ConfigManipulator#setUpdateCheck(boolean)
+	 */
+	@Override
+	public void setUpdateCheck(boolean checkUpdate) {
+		this.configuration.setUpdateCheck(checkUpdate);
+	}
+
+	/* (non-Javadoc)
+	 * @see at.asit.pdfover.gui.workflow.config.ConfigProvider#getUpdateCheck()
+	 */
+	@Override
+	public boolean getUpdateCheck() {
+		return this.configuration.getUpdateCheck();
+	}
+
+	/* (non-Javadoc)
 	 * @see at.asit.pdfover.gui.workflow.ConfigManipulator#setMainWindowSize(org.eclipse.swt.graphics.Point)
 	 */
 	@Override
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigurationContainer.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigurationContainer.java
index 486647cc..46ae32c6 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigurationContainer.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigurationContainer.java
@@ -232,6 +232,18 @@ public interface ConfigurationContainer {
 	public void setDefaultSignaturePosition(SignaturePosition signaturePosition);
 
 	/**
+	 * Gets whether to automatically check for application updates
+	 * @return whether to automatically check for application updates
+	 */
+	public boolean getUpdateCheck();
+
+	/**
+	 * Sets whether to automatically check for application updates
+	 * @param checkUpdate whether to automatically check for application updates
+	 */
+	public void setUpdateCheck(boolean checkUpdate);
+
+	/**
 	 * Gets the main window size
 	 * @return the main window size
 	 */
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigurationContainerImpl.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigurationContainerImpl.java
index ec79b403..630b22e9 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigurationContainerImpl.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/ConfigurationContainerImpl.java
@@ -103,6 +103,9 @@ public class ConfigurationContainerImpl implements ConfigurationContainer {
 	/** Holds the default signature position */
 	protected SignaturePosition defaultSignaturePosition = null;
 
+	/** Whether to automatically check for updates */
+	protected boolean updateCheck = true;
+
 	/** Whether to skip the output state */
 	protected boolean skipFinish = false;
 
@@ -429,6 +432,23 @@ public class ConfigurationContainerImpl implements ConfigurationContainer {
 
 
 	/* (non-Javadoc)
+	 * @see at.asit.pdfover.gui.workflow.config.ConfigurationContainer#getUpdateCheck()
+	 */
+	@Override
+	public boolean getUpdateCheck() {
+		return this.updateCheck;
+	}
+
+	/* (non-Javadoc)
+	 * @see at.asit.pdfover.gui.workflow.config.ConfigurationContainer#setUpdateCheck(boolean)
+	 */
+	@Override
+	public void setUpdateCheck(boolean checkUpdate) {
+		this.updateCheck = checkUpdate;
+	}
+
+
+	/* (non-Javadoc)
 	 * @see at.asit.pdfover.gui.workflow.ConfigurationContainer#getMainWindowSize()
 	 */
 	@Override
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/PersistentConfigProvider.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/PersistentConfigProvider.java
index fe4fceb3..9dcb38e5 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/PersistentConfigProvider.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/config/PersistentConfigProvider.java
@@ -128,6 +128,12 @@ public interface PersistentConfigProvider {
 	public Locale getSignLocale();
 
 	/**
+	 * Gets whether to automatically check for application updates
+	 * @return whether to automatically check for application updates
+	 */
+	public boolean getUpdateCheck();
+
+	/**
 	 * Gets the configured MainWindow size
 	 * @return the configured MainWindow size
 	 */
diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/states/PrepareConfigurationState.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/states/PrepareConfigurationState.java
index bb715712..63c54c71 100644
--- a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/states/PrepareConfigurationState.java
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/states/PrepareConfigurationState.java
@@ -16,14 +16,20 @@
 package at.asit.pdfover.gui.workflow.states;
 
 //Imports
+import java.awt.Desktop;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.net.URI;
 
+import org.apache.commons.httpclient.HttpClient;
+import org.apache.commons.httpclient.methods.GetMethod;
 import org.apache.log4j.PropertyConfigurator;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.program.Program;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -43,12 +49,16 @@ import at.asit.pdfover.gui.cliarguments.ProxyPassArgument;
 import at.asit.pdfover.gui.cliarguments.ProxyPortArgument;
 import at.asit.pdfover.gui.cliarguments.ProxyUserArgument;
 import at.asit.pdfover.gui.cliarguments.SkipFinishArgument;
-import at.asit.pdfover.gui.controls.ErrorDialog;
+import at.asit.pdfover.gui.controls.Dialog;
 import at.asit.pdfover.gui.controls.Dialog.BUTTONS;
+import at.asit.pdfover.gui.controls.Dialog.ICON;
+import at.asit.pdfover.gui.controls.ErrorDialog;
 import at.asit.pdfover.gui.exceptions.InitializationException;
 import at.asit.pdfover.gui.utils.Messages;
 import at.asit.pdfover.gui.utils.Unzipper;
+import at.asit.pdfover.gui.utils.VersionComparator;
 import at.asit.pdfover.gui.workflow.StateMachine;
+import at.asit.pdfover.gui.workflow.states.mobilebku.MobileBKUHelper;
 import at.asit.pdfover.signator.Signator;
 
 /**
@@ -104,7 +114,6 @@ public class PrepareConfigurationState extends State {
 								getStateMachine().getConfigProvider().getConfigurationDirectory() + FILE_SEPARATOR + filename));
 
 				log.info("Loaded config from file : " + filename); //$NON-NLS-1$
-
 			} catch (FileNotFoundException ex) {
 				if (filename.equals(Constants.DEFAULT_CONFIG_FILENAME)) {
 					// we only check for resource config file if it is the
@@ -329,6 +338,36 @@ public class PrepareConfigurationState extends State {
 				getStateMachine().exit();
 			}
 
+			// Check for updates
+			if (getStateMachine().getConfigProvider().getUpdateCheck() && Constants.APP_VERSION != null) {
+				HttpClient client = MobileBKUHelper.getHttpClient();
+				GetMethod method = new GetMethod(Constants.CURRENT_RELEASE_URL);
+				try {
+					client.executeMethod(method);
+					String version = method.getResponseBodyAsString().trim();
+
+					if (VersionComparator.before(Constants.APP_VERSION, version)) {
+						Dialog info = new Dialog(getStateMachine()
+							.getGUIProvider().getMainShell(),
+							Messages.getString("version_check.UpdateTitle"), //$NON-NLS-1$
+							String.format(Messages.getString("version_check.UpdateText"), //$NON-NLS-1$
+									version),
+							BUTTONS.OK_CANCEL, ICON.INFORMATION);
+						if (info.open() == SWT.OK)
+						{
+							if (Desktop.isDesktopSupported()) {
+								Desktop.getDesktop().browse(new URI(Constants.UPDATE_URL));
+							} else {
+								log.info("SWT Desktop is not supported on this platform"); //$NON-NLS-1$
+								Program.launch(Constants.UPDATE_URL);
+							}
+						}
+					}
+				} catch (Exception e) {
+					log.error("Error downloading update information: ", e); //$NON-NLS-1$
+				}
+			}
+
 			// Set usedSignerLib ...
 			getStateMachine().getPDFSigner().setUsedPDFSignerLibrary(
 					Signator.Signers.PDFAS);
diff --git a/pdf-over-gui/src/main/resources/at/asit/pdfover/gui/messages.properties b/pdf-over-gui/src/main/resources/at/asit/pdfover/gui/messages.properties
index f109bfac..740fe99b 100644
--- a/pdf-over-gui/src/main/resources/at/asit/pdfover/gui/messages.properties
+++ b/pdf-over-gui/src/main/resources/at/asit/pdfover/gui/messages.properties
@@ -34,6 +34,9 @@ advanced_config.SigPHTransparency=Signature placeholder transparency
 advanced_config.SigPHTransparencyMax=Opaque
 advanced_config.SigPHTransparencyMin=Invisible
 advanced_config.SigPHTransparencyTooltip=Set the transparency of the signature placeholder in the positioning step
+advanced_config.UpdateCheck_Title=Updates
+advanced_config.UpdateCheck=Automatically check for updates
+advanced_config.UpdateCheck_ToolTip=Shows a notification when a new version is available
 argument.error.output=is not a directory
 argument.help.autopos=Enables automatic signature positioning
 argument.help.bku=Select the CCE to use. Values are: LOCAL, MOBILE. Example: -b MOBILE
@@ -155,4 +158,6 @@ tanEnter.ReferenceValue=Reference value:
 tanEnter.TAN=TAN:
 tanEnter.tries=%d tries left!
 tanEnter.try=Only 1 try left!
+version_check.UpdateTitle=New version available!
+version_check.UpdateText=Version %s is available.\nOpen download page now?
 waiting.message=Signature creation in progress...
diff --git a/pdf-over-gui/src/main/resources/at/asit/pdfover/gui/messages_de.properties b/pdf-over-gui/src/main/resources/at/asit/pdfover/gui/messages_de.properties
index 103f89ae..38c053cc 100644
--- a/pdf-over-gui/src/main/resources/at/asit/pdfover/gui/messages_de.properties
+++ b/pdf-over-gui/src/main/resources/at/asit/pdfover/gui/messages_de.properties
@@ -34,6 +34,9 @@ advanced_config.SigPHTransparency=Signaturplatzhalter-Transparenz
 advanced_config.SigPHTransparencyMax=Undurchsichtig
 advanced_config.SigPHTransparencyMin=Unsichtbar
 advanced_config.SigPHTransparencyTooltip=Wählt die Transparenz des Signaturplatzhalters im Schritt "Positionierung"
+advanced_config.UpdateCheck_Title=Updates
+advanced_config.UpdateCheck=Automatisch auf Updates überprüfen
+advanced_config.UpdateCheck_ToolTip=Zeigt eine Benachrichtigung, wenn eine neue Version verfügbar ist
 argument.error.output=ist kein Ordner
 argument.help.autopos=Aktiviert automatische Positionierung der Signatur
 argument.help.bku=Wählen Sie die BKU. Gültige Werte: LOCAL, MOBILE. Bsp.: -b MOBILE
@@ -155,4 +158,6 @@ tanEnter.ReferenceValue=Vergleichswert:
 tanEnter.TAN=TAN:
 tanEnter.tries=%d Versuche übrig!
 tanEnter.try=Nur noch 1 Versuch übrig!
+version_check.UpdateTitle=Neue Version verfügbar!
+version_check.UpdateText=Version %s ist verfügbar\nJetzt Download-Seite öffnen?
 waiting.message=Signaturerstellung läuft...