package org.openslx.dozmod.gui;
import java.lang.reflect.Constructor;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
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.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
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.Shell;
import org.openslx.dozmod.App;
import org.openslx.dozmod.Config;
import org.openslx.dozmod.gui.Gui.GuiCallable;
import org.openslx.dozmod.gui.helper.CompositePage;
import org.openslx.dozmod.gui.helper.MessageType;
import org.openslx.dozmod.gui.window.DisclaimerWindow;
import org.openslx.dozmod.gui.window.ImageListWindow;
import org.openslx.dozmod.gui.window.LectureListWindow;
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;
import org.openslx.util.QuickTimer;
public abstract class MainWindow {
private final static Logger LOGGER = Logger.getLogger(MainWindow.class);
private static final Shell mainShell;
private static CompositePage currentPage;
private static final Map<Class<? extends CompositePage>, CompositePage> pages = new ConcurrentHashMap<>();
private static final String THRIFT_CONNECTION_ERROR = "Lost connection to the masterserver. Do you want to retry?";
/**
* Set the visible page of the main window.
*
* @param clazz
*/
public static void showPage(Class<? extends CompositePage> clazz) {
if (currentPage != null && currentPage.getLayoutData() != null) {
if (!currentPage.hide()) {
return; // Canceled by currently shown page
}
((GridData) currentPage.getLayoutData()).exclude = true;
currentPage.setVisible(false);
}
currentPage = pages.get(clazz);
if (currentPage == null) {
showMessageBox("Tried to show unknown page " + clazz.getSimpleName(), MessageType.ERROR, LOGGER,
null);
Gui.exit(1);
return;
}
// sets the starting preferred size.
currentPage.show();
((GridData) currentPage.getLayoutData()).exclude = false;
currentPage.setVisible(true);
mainShell.layout();
}
/**
*
* @param clazz Class to open as a popup over the main window.
* MUST be a subclass of Composite.
* @param modal modal mode - other windows will be blocked until this popup
* is closed
* @param noclose don't allow closing the popup via the (X) in the title bar
*/
public static void openPopup(Class<? extends Composite> clazz, boolean modal, boolean noclose) {
int style = SWT.TITLE | SWT.BORDER | SWT.RESIZE;
if (modal)
style |= SWT.APPLICATION_MODAL;
if (!noclose)
style |= SWT.CLOSE;
Shell dialogShell = Gui.newShell(mainShell, style);
// populate dialogShell
dialogShell.setLayout(new GridLayout(1, false));
Constructor<?> con = null;
try {
con = clazz.getConstructor(Shell.class);
con.newInstance(dialogShell);
} catch (Exception e1) {
Gui.showMessageBox(mainShell, "Cannot show popup " + clazz.getName(), MessageType.DEBUG, LOGGER,
e1);
return;
}
if (noclose) {
// Add listener that will cancel a close request via the X.
// (Some platforms don't allow disabling it via style, so this is used to be safe)
dialogShell.addListener(SWT.Close, new Listener() {
@Override
public void handleEvent(Event event) {
event.doit = false;
}
});
}
dialogShell.layout();
dialogShell.pack();
Gui.limitShellSize(dialogShell);
dialogShell.open();
}
/**
* Initializes 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.
*/
static {
// init SWT stuff
mainShell = Gui.newShell(SWT.SHELL_TRIM | SWT.CENTER);
// Catch the close button (X)
mainShell.addListener(SWT.Close, new Listener() {
public void handleEvent(Event event) {
MainWindow.askApplicationQuit();
event.doit = false;
}
});
// Set up thrift error message displaying
ThriftManager.setErrorCallback(new ErrorCallback() {
@Override
public boolean thriftError(int failCount, String method, final Throwable t) {
// if it's the first fail, retry immediately
if (failCount == 1)
return true;
// Otherwise, ask user if we should retry
return Gui.syncExec(new GuiCallable<Boolean>() {
@Override
public Boolean run() {
return Gui.showMessageBox(mainShell, THRIFT_CONNECTION_ERROR,
MessageType.ERROR_RETRY, LOGGER, t);
}
});
}
});
// Same for config errors
Config.setErrorCallback(new Config.ErrorCallback() {
@Override
public void writeError(final Throwable t) {
Gui.asyncExec(new Runnable() {
@Override
public void run() {
showMessageBox("Konnte Programmeinstellungen nicht speichern", MessageType.WARNING,
LOGGER, t);
}
});
}
});
// Global key listener
Gui.display.addFilter(SWT.KeyDown, new Listener() {
@Override
public void handleEvent(Event event) {
if (event.character == 17) { // Ctrl-Q = Quit
askApplicationQuit();
event.doit = false;
}
}
});
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);
// register all pages of the main window
registerPage(new MainMenuWindow(mainShell));
registerPage(new ImageListWindow(mainShell));
registerPage(new LectureListWindow(mainShell));
// Show main menu by default
showPage(MainMenuWindow.class);
// center the window on the primary monitor
Gui.centerShell(mainShell);
Gui.limitShellSize(mainShell);
mainShell.open();
// here we can check for Session information
if (Session.getSatelliteToken() != null) {
// Wait for proxy server init
App.waitForInit();
// TODO: Try to resume session
}
// Session resume probably failed, show login window
if (Session.getSatelliteToken() == null) {
// User did not login, show the login mask
openPopup(LoginWindow.class, true, true);
}
}
/**
* Request application quit. Will show a message box asking the user for
* confirmation.
*/
protected static void askApplicationQuit() {
// TODO: Only ask if an upload or download is running,, wizard is open etc..
if (showMessageBox("Are you sure you want to quit?", MessageType.QUESTION_YESNO, null, null)) {
QuickTimer.cancel();
Gui.exit(0);
}
}
/**
* Register a page that can be displayed in the main window.
*
* @param window
*/
private static synchronized void registerPage(CompositePage window) {
Class<? extends CompositePage> clazz = window.getClass();
if (pages.containsKey(clazz))
throw new IllegalArgumentException("Page " + clazz.getSimpleName() + " already registered!");
pages.put(clazz, window);
GridData gd = new GridData(GridData.FILL, GridData.FILL, true, true);
gd.exclude = true;
window.setLayoutData(gd);
window.setVisible(false);
}
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) {
askApplicationQuit();
}
});
// 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, 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, false);
}
});
mainShell.setMenuBar(menuBar);
}
/**
* Generic helper to show a message box to the user, and optionally log the
* message to the log file. The main window will be the parent of the
* message box.
*
* @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(String message, MessageType messageType, Logger logger,
Throwable exception) {
return Gui.showMessageBox(mainShell, message, messageType, logger, exception);
}
public static void open() {
mainShell.open();
}
}
