[client] Minor refactoring

1 files changed, 223 insertions, 0 deletions

diff --git a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/MainWindow.java b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/MainWindow.java
new file mode 100644
index 00000000..72b19293
--- /dev/null
+++ b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/MainWindow.java
@@ -0,0 +1,223 @@
+package org.openslx.dozmod.gui;
+
+import java.lang.reflect.Constructor;
+
+import org.apache.log4j.Logger;
+import org.eclipse.swt.SWT;
+import org.eclipse.swt.events.SelectionAdapter;
+import org.eclipse.swt.events.SelectionEvent;
+import org.eclipse.swt.graphics.Rectangle;
+import org.eclipse.swt.layout.GridData;
+import org.eclipse.swt.layout.GridLayout;
+import org.eclipse.swt.widgets.Composite;
+import org.eclipse.swt.widgets.Display;
+import org.eclipse.swt.widgets.Event;
+import org.eclipse.swt.widgets.Listener;
+import org.eclipse.swt.widgets.Menu;
+import org.eclipse.swt.widgets.MenuItem;
+import org.eclipse.swt.widgets.MessageBox;
+import org.eclipse.swt.widgets.Monitor;
+import org.eclipse.swt.widgets.Shell;
+import org.openslx.dozmod.gui.helper.MessageType;
+import org.openslx.dozmod.gui.window.DisclaimerWindow;
+import org.openslx.dozmod.gui.window.LoginWindow;
+import org.openslx.dozmod.gui.window.MainMenuWindow;
+import org.openslx.dozmod.gui.window.VirtualizerNoticeWindow;
+import org.openslx.dozmod.thrift.Session;
+import org.openslx.thrifthelper.ThriftManager;
+import org.openslx.thrifthelper.ThriftManager.ErrorCallback;
+
+public abstract class MainWindow {
+
+	private final static Logger LOGGER = Logger.getLogger(MainWindow.class);
+
+	private static final Shell mainShell;
+	private static Composite contentComposite;
+	private static final Display display;
+
+	private static final String THRIFT_CONNECTION_ERROR = "Lost connection to the masterserver. Do you want to retry?";
+
+	/**
+	 * Add a new composite with content to the main Shell
+	 * 
+	 * @param The composite to add, should be a GUI
+	 */
+	public static void setContent(Composite contentComposite) {
+
+		if (contentComposite == null) return;
+		if (MainWindow.contentComposite != null)
+			MainWindow.contentComposite.dispose();
+
+		MainWindow.contentComposite = contentComposite;
+
+		// sets the starting preferred size.
+		contentComposite.setLayoutData(new GridData(GridData.FILL, GridData.FILL, true, true));
+		mainShell.layout();
+	}
+
+	/**
+	 * @param clazz Class to open as a popup over the main window.
+	 * MUST be a subclass of Composite.
+	 */
+	public static void openPopup(Class<? extends Composite> clazz, boolean modal) {
+		Shell dialogShell = new Shell(mainShell, SWT.DIALOG_TRIM | (modal ? SWT.APPLICATION_MODAL : 0));
+		// populate dialogShell
+		dialogShell.setLayout(new GridLayout(1, false));
+		LOGGER.debug(clazz.getDeclaredClasses());
+		Constructor<?> con = null;
+		try {
+			con = clazz.getConstructor(Shell.class);
+			con.newInstance(dialogShell);
+		} catch (Exception e1) {
+			showMessageBox(mainShell, "Cannot show popup " + clazz.getName(), MessageType.DEBUG, LOGGER, e1);
+			return;
+		}
+
+		dialogShell.layout();
+		dialogShell.pack();
+		dialogShell.open();
+	}
+
+	/**
+	 * @return The instance of SWT display currently in use
+	 */
+	public static Display getDisplay() {
+		return display;
+	}
+	
+	static {
+		// init SWT stuff
+		display = new Display();
+		mainShell = new Shell(display, SWT.SHELL_TRIM | SWT.CENTER);
+
+		// Set up thrift error message displaying
+		ThriftManager.setErrorCallback(new ErrorCallback() {
+
+			@Override
+			public boolean thriftError(int failCount, String method, Throwable t) {
+				// Ask user if we should retry
+				return showMessageBox(mainShell, THRIFT_CONNECTION_ERROR, MessageType.ERROR_RETRY, LOGGER, t);
+			}
+		});
+
+		// Global key listener
+		display.addFilter(SWT.KeyDown, new Listener() {
+			@Override
+			public void handleEvent(Event event) {
+				if (event.character == 17) // Ctrl-Q = Quit
+					System.exit(0);
+			}
+		});
+
+		createMenu();
+
+		mainShell.setText("bwSuite");
+
+		// Set layout for the mainshell, items added to the shell should get a gridData
+		mainShell.setLayout(new GridLayout(1, true));
+		mainShell.setMinimumSize(850, 650);
+
+		// always show the main menu
+		setContent(new MainMenuWindow(mainShell));
+
+		// center the window on the primary monitor
+		Monitor primary = display.getPrimaryMonitor();
+		Rectangle bounds = primary.getBounds();
+		Rectangle rect = mainShell.getBounds();
+
+		int x = bounds.x + (bounds.width - rect.width) / 2;
+		int y = bounds.y + (bounds.height - rect.height) / 2;
+
+		mainShell.setLocation(x, y);
+		mainShell.open();
+
+		// here we can check for Session information
+		if (Session.getSatelliteToken() == null) {
+			// User did not login, show the login mask
+			openPopup(LoginWindow.class, true);
+		}
+	}
+
+	/**
+	 * Initialises the GUI by creating the main window, adding the menu and
+	 * creating the login mask as the first content window.
+	 * Further sets up the global thrift error callback to catch any
+	 * connection errors during the communication with the servers.
+	 */
+	public static void mainloop() {
+		while (!mainShell.isDisposed()) {
+			if (!display.readAndDispatch())
+				display.sleep();
+		}
+	}
+
+	private static void createMenu() {
+		// the File menu button
+		Menu menuBar = new Menu(mainShell, SWT.BAR);
+		MenuItem cascadeFileMenu = new MenuItem(menuBar, SWT.CASCADE);
+		cascadeFileMenu.setText("&File");
+
+		Menu fileMenu = new Menu(mainShell, SWT.DROP_DOWN);
+		cascadeFileMenu.setMenu(fileMenu);
+
+		MenuItem exitItem = new MenuItem(fileMenu, SWT.PUSH);
+		exitItem.setText("&Exit");
+		exitItem.addSelectionListener(new SelectionAdapter() {
+			@Override
+			public void widgetSelected(SelectionEvent e) {
+				System.exit(0);
+			}
+		});
+
+		// the About menu button
+		MenuItem cascadeAboutMenu = new MenuItem(menuBar, SWT.CASCADE);
+		cascadeAboutMenu.setText("&About");
+
+		Menu aboutMenu = new Menu(mainShell, SWT.DROP_DOWN);
+		cascadeAboutMenu.setMenu(aboutMenu);
+
+		MenuItem disclaimerItem = new MenuItem(aboutMenu, SWT.PUSH);
+		disclaimerItem.setText("&Disclaimer");
+		disclaimerItem.addSelectionListener(new SelectionAdapter() {
+			@Override
+			public void widgetSelected(SelectionEvent e) {
+				MainWindow.openPopup(DisclaimerWindow.class, false);
+			}
+		});
+
+		MenuItem virtualizerNoticeItem = new MenuItem(aboutMenu, SWT.PUSH);
+		virtualizerNoticeItem.setText("&Virtualizer");
+		virtualizerNoticeItem.addSelectionListener(new SelectionAdapter() {
+			@Override
+			public void widgetSelected(SelectionEvent e) {
+				MainWindow.openPopup(VirtualizerNoticeWindow.class, false);
+			}
+		});
+		mainShell.setMenuBar(menuBar);
+	}
+
+	/**
+	 * Generic helper to show a message box to the user, and optionally log the
+	 * message to the log file.
+	 * 
+	 * @param parent parent shell this message box belongs to
+	 * @param message Message to display. Can be multiline.
+	 * @param messageType Type of message (warning, information)
+	 * @param logger Logger instance to log to. Can be null.
+	 * @param exception Exception related to this message. Can be null.
+	 * @return true if OK, YES or RETRY was clicked, false for CANCEL or NO
+	 */
+	public static boolean showMessageBox(Shell parent, String message, MessageType messageType,
+			Logger logger, Throwable exception) {
+		if (logger != null)
+			logger.log(messageType.logPriority, message, exception);
+		if (exception != null)
+			message += "\n\n" + exception.getClass().getSimpleName() + " (Siehe Logdatei)";
+		MessageBox box = new MessageBox(parent, messageType.style);
+		box.setMessage(message);
+		box.setText(messageType.title);
+		int ret = box.open();
+		return ret == SWT.OK || ret == SWT.RETRY || ret == SWT.YES;
+	}
+
+}