Example #1
0
class MainWindow(QMainWindow):
    max_recent = 5

    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        QApplication.setApplicationName('Sherloq')
        QApplication.setOrganizationName('Guido Bartoli')
        QApplication.setOrganizationDomain('www.guidobartoli.com')
        QApplication.setApplicationVersion(ToolTree().version)
        QApplication.setWindowIcon(QIcon('icons/sherloq_white.png'))
        self.setWindowTitle('{} {}'.format(QApplication.applicationName(),
                                           QApplication.applicationVersion()))
        self.mdi_area = QMdiArea()
        self.setCentralWidget(self.mdi_area)
        self.filename = None
        self.image = None
        modify_font(self.statusBar(), bold=True)

        tree_dock = QDockWidget(self.tr('TOOLS'), self)
        tree_dock.setObjectName('tree_dock')
        tree_dock.setAllowedAreas(Qt.LeftDockWidgetArea
                                  | Qt.RightDockWidgetArea)
        self.addDockWidget(Qt.LeftDockWidgetArea, tree_dock)
        self.tree_widget = ToolTree()
        self.tree_widget.setObjectName('tree_widget')
        self.tree_widget.itemDoubleClicked.connect(self.open_tool)
        tree_dock.setWidget(self.tree_widget)

        tools_action = tree_dock.toggleViewAction()
        tools_action.setText(self.tr('Show tools'))
        tools_action.setToolTip(self.tr('Toggle toolset visibility'))
        tools_action.setShortcut(QKeySequence(Qt.Key_Tab))
        tools_action.setObjectName('tools_action')
        tools_action.setIcon(QIcon('icons/tools.svg'))

        help_action = QAction(self.tr('Show help'), self)
        help_action.setToolTip(self.tr('Toggle online help'))
        help_action.setShortcut(QKeySequence.HelpContents)
        help_action.setObjectName('help_action')
        help_action.setIcon(QIcon('icons/help.svg'))
        help_action.setCheckable(True)
        help_action.setEnabled(False)

        load_action = QAction(self.tr('&Load image...'), self)
        load_action.setToolTip(self.tr('Load an image to analyze'))
        load_action.setShortcut(QKeySequence.Open)
        load_action.triggered.connect(self.load_file)
        load_action.setObjectName('load_action')
        load_action.setIcon(QIcon('icons/load.svg'))

        quit_action = QAction(self.tr('&Quit'), self)
        quit_action.setToolTip(self.tr('Exit from Sherloq'))
        quit_action.setShortcut(QKeySequence.Quit)
        quit_action.triggered.connect(self.close)
        quit_action.setObjectName('quit_action')
        quit_action.setIcon(QIcon('icons/quit.svg'))

        tabbed_action = QAction(self.tr('&Tabbed'), self)
        tabbed_action.setToolTip(self.tr('Toggle tabbed view for window area'))
        tabbed_action.setShortcut(QKeySequence(Qt.Key_F10))
        tabbed_action.setCheckable(True)
        tabbed_action.triggered.connect(self.toggle_view)
        tabbed_action.setObjectName('tabbed_action')
        tabbed_action.setIcon(QIcon('icons/tabbed.svg'))

        prev_action = QAction(self.tr('&Previous'), self)
        prev_action.setToolTip(self.tr('Select the previous tool window'))
        prev_action.setShortcut(QKeySequence.PreviousChild)
        prev_action.triggered.connect(self.mdi_area.activatePreviousSubWindow)
        prev_action.setObjectName('prev_action')
        prev_action.setIcon(QIcon('icons/previous.svg'))

        next_action = QAction(self.tr('&Next'), self)
        next_action.setToolTip(self.tr('Select the next tool window'))
        next_action.setShortcut(QKeySequence.NextChild)
        next_action.triggered.connect(self.mdi_area.activateNextSubWindow)
        next_action.setObjectName('next_action')
        next_action.setIcon(QIcon('icons/next.svg'))

        tile_action = QAction(self.tr('&Tile'), self)
        tile_action.setToolTip(
            self.tr('Arrange windows into non-overlapping views'))
        tile_action.setShortcut(QKeySequence(Qt.Key_F11))
        tile_action.triggered.connect(self.mdi_area.tileSubWindows)
        tile_action.setObjectName('tile_action')
        tile_action.setIcon(QIcon('icons/tile.svg'))

        cascade_action = QAction(self.tr('&Cascade'), self)
        cascade_action.setToolTip(
            self.tr('Arrange windows into overlapping views'))
        cascade_action.setShortcut(QKeySequence(Qt.Key_F12))
        cascade_action.triggered.connect(self.mdi_area.cascadeSubWindows)
        cascade_action.setObjectName('cascade_action')
        cascade_action.setIcon(QIcon('icons/cascade.svg'))

        close_action = QAction(self.tr('Close &All'), self)
        close_action.setToolTip(self.tr('Close all open tool windows'))
        close_action.setShortcut(QKeySequence(Qt.CTRL + Qt.SHIFT + Qt.Key_W))
        close_action.triggered.connect(self.mdi_area.closeAllSubWindows)
        close_action.setObjectName('close_action')
        close_action.setIcon(QIcon('icons/close.svg'))

        self.full_action = QAction(self.tr('Full screen'), self)
        self.full_action.setToolTip(self.tr('Switch to full screen mode'))
        self.full_action.setShortcut(QKeySequence.FullScreen)
        self.full_action.triggered.connect(self.change_view)
        self.full_action.setObjectName('full_action')
        self.full_action.setIcon(QIcon('icons/full.svg'))

        self.normal_action = QAction(self.tr('Normal view'), self)
        self.normal_action.setToolTip(self.tr('Back to normal view mode'))
        self.normal_action.setShortcut(QKeySequence(Qt.CTRL + Qt.Key_F12))
        self.normal_action.triggered.connect(self.change_view)
        self.normal_action.setObjectName('normal_action')
        self.normal_action.setIcon(QIcon('icons/normal.svg'))

        about_action = QAction(self.tr('&About...'), self)
        about_action.setToolTip(self.tr('Information about this program'))
        about_action.triggered.connect(self.show_about)
        about_action.setObjectName('about_action')
        about_action.setIcon(QIcon('icons/sherloq_alpha.png'))

        about_qt_action = QAction(self.tr('About &Qt'), self)
        about_qt_action.setToolTip(
            self.tr('Information about the Qt Framework'))
        about_qt_action.triggered.connect(QApplication.aboutQt)
        about_qt_action.setIcon(QIcon('icons/Qt.svg'))

        file_menu = self.menuBar().addMenu(self.tr('&File'))
        file_menu.addAction(load_action)
        file_menu.addSeparator()
        self.recent_actions = [None] * self.max_recent
        for i in range(len(self.recent_actions)):
            self.recent_actions[i] = QAction(self)
            self.recent_actions[i].setVisible(False)
            self.recent_actions[i].triggered.connect(self.open_recent)
            file_menu.addAction(self.recent_actions[i])
        file_menu.addSeparator()
        file_menu.addAction(quit_action)

        view_menu = self.menuBar().addMenu(self.tr('&View'))
        view_menu.addAction(tools_action)
        view_menu.addAction(help_action)
        view_menu.addSeparator()
        view_menu.addAction(self.full_action)
        view_menu.addAction(self.normal_action)

        window_menu = self.menuBar().addMenu(self.tr('&Window'))
        window_menu.addAction(prev_action)
        window_menu.addAction(next_action)
        window_menu.addSeparator()
        window_menu.addAction(tile_action)
        window_menu.addAction(cascade_action)
        window_menu.addAction(tabbed_action)
        window_menu.addSeparator()
        window_menu.addAction(close_action)

        help_menu = self.menuBar().addMenu(self.tr('&Help'))
        help_menu.addAction(help_action)
        help_menu.addSeparator()
        help_menu.addAction(about_action)
        help_menu.addAction(about_qt_action)

        main_toolbar = self.addToolBar(self.tr('&Toolbar'))
        main_toolbar.setToolButtonStyle(Qt.ToolButtonTextBesideIcon)
        main_toolbar.addAction(load_action)
        main_toolbar.addSeparator()
        main_toolbar.addAction(tools_action)
        main_toolbar.addAction(help_action)
        main_toolbar.addSeparator()
        main_toolbar.addAction(prev_action)
        main_toolbar.addAction(next_action)
        main_toolbar.addSeparator()
        main_toolbar.addAction(tile_action)
        main_toolbar.addAction(cascade_action)
        main_toolbar.addAction(tabbed_action)
        main_toolbar.addAction(close_action)
        # main_toolbar.addSeparator()
        # main_toolbar.addAction(self.normal_action)
        # main_toolbar.addAction(self.full_action)
        main_toolbar.setAllowedAreas(Qt.TopToolBarArea | Qt.BottomToolBarArea)
        main_toolbar.setObjectName('main_toolbar')

        settings = QSettings()
        settings.beginGroup('main_window')
        self.restoreGeometry(settings.value('geometry'))
        self.restoreState(settings.value('state'))
        self.recent_files = settings.value('recent_files')
        if self.recent_files is None:
            self.recent_files = []
        elif not isinstance(self.recent_files, list):
            self.recent_files = [self.recent_files]
        self.update_recent()
        settings.endGroup()

        prev_action.setEnabled(False)
        next_action.setEnabled(False)
        tile_action.setEnabled(False)
        cascade_action.setEnabled(False)
        close_action.setEnabled(False)
        tabbed_action.setEnabled(False)
        self.tree_widget.setEnabled(False)
        self.showNormal()
        self.normal_action.setEnabled(False)
        self.show_message(self.tr('Ready'))

    def change_view(self):
        if self.isFullScreen():
            self.showNormal()
            self.showMaximized()
            self.full_action.setEnabled(True)
            self.normal_action.setEnabled(False)
        else:
            self.showFullScreen()
            self.full_action.setEnabled(False)
            self.normal_action.setEnabled(True)

    def closeEvent(self, event):
        settings = QSettings()
        settings.beginGroup('main_window')
        settings.setValue('geometry', self.saveGeometry())
        settings.setValue('state', self.saveState())
        settings.setValue('recent_files', self.recent_files)
        settings.endGroup()
        super(MainWindow, self).closeEvent(event)

    def update_recent(self):
        if not self.recent_files:
            return
        self.recent_files = [f for f in self.recent_files if os.path.isfile(f)]
        for i in range(len(self.recent_actions)):
            if i < len(self.recent_files):
                text = '&{} {}'.format(i + 1,
                                       os.path.basename(self.recent_files[i]))
                self.recent_actions[i].setText(text)
                self.recent_actions[i].setData(self.recent_files[i])
                self.recent_actions[i].setVisible(True)
            else:
                self.recent_actions[i].setVisible(False)

    def open_recent(self):
        action = self.sender()
        if action:
            filename, basename, image = load_image(self, action.data())
            self.initialize(filename, basename, image)

    def initialize(self, filename, basename, image):
        self.filename = filename
        self.image = image
        self.findChild(ToolTree, 'tree_widget').setEnabled(True)
        self.findChild(QAction, 'prev_action').setEnabled(True)
        self.findChild(QAction, 'next_action').setEnabled(True)
        self.findChild(QAction, 'tile_action').setEnabled(True)
        self.findChild(QAction, 'cascade_action').setEnabled(True)
        self.findChild(QAction, 'close_action').setEnabled(True)
        self.findChild(QAction, 'tabbed_action').setEnabled(True)
        self.setWindowTitle('[{}] - {} {}'.format(
            basename, QApplication.applicationName(),
            QApplication.applicationVersion()))
        if filename not in self.recent_files:
            self.recent_files.insert(0, filename)
            if len(self.recent_files) > self.max_recent:
                self.recent_files = self.recent_files[:self.max_recent]
            self.update_recent()
        self.show_message(
            self.tr('Image "{}" successfully loaded'.format(basename)))

        # FIXME: disable_bold della chiusura viene chiamato DOPO open_tool e nell'albero la voce NON diventa neretto
        self.mdi_area.closeAllSubWindows()
        self.open_tool(self.tree_widget.topLevelItem(0).child(0), None)

    def load_file(self):
        filename, basename, image = load_image(self)
        if filename is None:
            return
        self.initialize(filename, basename, image)

    def open_tool(self, item, _):
        if not item.data(0, Qt.UserRole):
            return
        group = item.data(0, Qt.UserRole + 1)
        tool = item.data(0, Qt.UserRole + 2)
        for sub_window in self.mdi_area.subWindowList():
            if sub_window.windowTitle() == item.text(0):
                sub_window.setWindowState(Qt.WindowActive)
                sub_window.setFocus()
                return

        if group == 0:
            if tool == 0:
                tool_widget = OriginalWidget(self.image)
            elif tool == 1:
                tool_widget = DigestWidget(self.filename, self.image)
            elif tool == 2:
                tool_widget = EditorWidget()
            elif tool == 3:
                tool_widget = ReverseWidget()
            else:
                return
        elif group == 1:
            if tool == 0:
                tool_widget = HeaderWidget(self.filename)
            elif tool == 1:
                tool_widget = ExifWidget(self.filename)
            elif tool == 2:
                tool_widget = ThumbWidget(self.filename, self.image)
            elif tool == 3:
                tool_widget = LocationWidget(self.filename)
            else:
                return
        elif group == 2:
            if tool == 0:
                tool_widget = MagnifierWidget(self.image)
            elif tool == 1:
                tool_widget = HistWidget(self.image)
            elif tool == 2:
                tool_widget = AdjustWidget(self.image)
            elif tool == 3:
                tool_widget = ComparisonWidget(self.filename, self.image)
            else:
                return
        elif group == 3:
            if tool == 0:
                tool_widget = GradientWidget(self.image)
            elif tool == 1:
                tool_widget = EchoWidget(self.image)
            elif tool == 2:
                tool_widget = WaveletWidget(self.image)
            else:
                return
        elif group == 4:
            if tool == 0:
                tool_widget = PlotsWidget(self.image)
            elif tool == 1:
                tool_widget = SpaceWidget(self.image)
            elif tool == 2:
                tool_widget = PcaWidget(self.image)
            elif tool == 3:
                tool_widget = StatsWidget(self.image)
            else:
                return
        elif group == 5:
            if tool == 0:
                tool_widget = NoiseWidget(self.image)
            elif tool == 1:
                tool_widget = MinMaxWidget(self.image)
            elif tool == 2:
                tool_widget = FrequencyWidget(self.image)
            elif tool == 3:
                tool_widget = PlanesWidget(self.image)
            else:
                return
        elif group == 6:
            if tool == 0:
                tool_widget = ElaWidget(self.image)
            elif tool == 1:
                tool_widget = QualityWidget(self.filename)
            elif tool == 2:
                tool_widget = MultipleWidget(self.image)
            else:
                return
        elif group == 7:
            if tool == 0:
                tool_widget = ContrastWidget(self.image)
            elif tool == 1:
                tool_widget = CloningWidget(self.image)
            elif tool == 2:
                # tool_widget = ResamplingWidget(self.image)
                pass
            else:
                return
        elif group == 8:
            if tool == 3:
                tool_widget = StereoWidget(self.image)
            else:
                return
        else:
            return

        # FIXME: Aggiungere un metodo init e dopo fare il connect, sennò i messaggi inviati nel costruttore non si vedono
        tool_widget.info_message.connect(self.show_message)

        sub_window = QMdiSubWindow()
        sub_window.setWidget(tool_widget)
        sub_window.setWindowTitle(item.text(0))
        sub_window.setObjectName(item.text(0))
        sub_window.setAttribute(Qt.WA_DeleteOnClose)
        sub_window.setWindowIcon(QIcon('icons/{}.svg'.format(group)))
        self.mdi_area.addSubWindow(sub_window)
        sub_window.show()
        sub_window.destroyed.connect(self.disable_bold)
        self.tree_widget.set_bold(item.text(0), enabled=True)

    def disable_bold(self, item):
        self.tree_widget.set_bold(item.windowTitle(), enabled=False)

    def toggle_view(self, tabbed):
        if tabbed:
            self.mdi_area.setViewMode(QMdiArea.TabbedView)
            self.mdi_area.setTabsClosable(True)
            self.mdi_area.setTabsMovable(True)
        else:
            self.mdi_area.setViewMode(QMdiArea.SubWindowView)
        self.findChild(QAction, 'tile_action').setEnabled(not tabbed)
        self.findChild(QAction, 'cascade_action').setEnabled(not tabbed)

    def show_about(self):
        message = '<h2>{} {}</h2>'.format(QApplication.applicationName(),
                                          QApplication.applicationVersion())
        message += '<h3>A digital image forensic toolkit</h3>'
        message += '<p>author: <a href="{}">{}</a></p>'.format(
            QApplication.organizationDomain(), QApplication.organizationName())
        message += '<p>source: <a href="https://github.com/GuidoBartoli/sherloq">GitHub repository</a></p>'
        QMessageBox.about(self, self.tr('About'), message)

    def show_message(self, message):
        self.statusBar().showMessage(message, 10000)
Example #2
0
class Window(QMainWindow, EditActions.Mixin, FileActions.Mixin,
             HelpActions.Mixin, ItemsTreeView.Mixin, OptionsActions.Mixin,
             PragmaView.Mixin, ViewActions.Mixin, SaveRestoreUi.Mixin):
    def __init__(self, filename):
        super().__init__()
        self.setWindowTitle(f'{APPNAME} {VERSION}')
        self.make_variables()
        self.make_widgets()
        self.make_actions()
        self.make_connections()
        qApp.commitDataRequest.connect(self.close)
        options = self.load_options(filename)
        self.update_ui()
        QTimer.singleShot(0, lambda: self.initalize_toggle_actions(options))

    def closeEvent(self, event):
        self.closing = True
        options = Config.MainWindowOptions(
            state=self.saveState(),
            geometry=self.saveGeometry(),
            last_filename=str(self.db.filename or ''),
            recent_files=list(self.recent_files),
            show_items_tree=self.itemsTreeDock.isVisible(),
            show_pragmas=self.pragmasDock.isVisible(),
            show_as_tabs=self.mdiArea.viewMode() == QMdiArea.TabbedView)
        Config.write_main_window_options(options)
        self.clear()
        event.accept()

    def make_variables(self):
        self.db = Db.Db()
        self.path = self.export_path = QStandardPaths.writableLocation(
            QStandardPaths.DocumentsLocation)
        self.recent_files = RecentFiles.get(RECENT_FILES_MAX)
        self.closing = False

    def make_widgets(self):
        self.mdiArea = QMdiArea()
        self.mdiArea.setVerticalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        self.mdiArea.setHorizontalScrollBarPolicy(Qt.ScrollBarAsNeeded)
        self.mdiArea.setTabsClosable(True)
        self.mdiArea.setTabsMovable(True)
        self.setCentralWidget(self.mdiArea)
        allowedAreas = Qt.LeftDockWidgetArea | Qt.RightDockWidgetArea
        view = ItemsTreeView.View(self.db)
        self.itemsTreeDock = make_dock_widget(self, 'Items Tree', view,
                                              Qt.LeftDockWidgetArea,
                                              allowedAreas)
        view = PragmaView.View(self.db)
        self.pragmasDock = make_dock_widget(self, 'Pragmas', view,
                                            Qt.RightDockWidgetArea,
                                            allowedAreas)
        # TODO Calendar dock widget

    def make_actions(self):
        self.make_file_actions()
        self.file_menu = self.menuBar().addMenu('&File')
        add_actions(self.file_menu, self.file_actions_for_menu)
        self.file_toolbar = self.addToolBar('File')
        self.file_toolbar.setObjectName('File')
        add_actions(self.file_toolbar, self.file_actions_for_toolbar)

        self.make_edit_actions()
        self.edit_menu = self.menuBar().addMenu('&Edit')
        add_actions(self.edit_menu, self.edit_actions_for_menu)
        self.edit_toolbar = self.addToolBar('Edit')
        self.edit_toolbar.setObjectName('Edit')
        add_actions(self.edit_toolbar, self.edit_actions_for_toolbar)

        self.make_view_actions()
        self.view_menu = self.menuBar().addMenu('&View')
        add_actions(self.view_menu, self.view_actions_for_menu)
        self.view_toolbar = self.addToolBar('View')
        self.view_toolbar.setObjectName('View')
        add_actions(self.view_toolbar, self.view_actions_for_toolbar)

        # TODO record actions & database actions & (sdi) window actions +
        # update OptionsActions options_restore_toolbars()

        self.make_options_actions()
        self.options_menu = self.menuBar().addMenu('&Options')
        add_actions(self.options_menu, self.options_actions_for_menu)
        # self.options_toolbar = self.addToolBar('Options')
        # self.options_toolbar.setObjectName('Options')
        # add_actions(self.options_toolbar, self.options_actions_for_toolbar)

        self.make_help_actions()
        self.help_menu = self.menuBar().addMenu('&Help')
        add_actions(self.help_menu, self.help_actions_for_menu)

    def make_connections(self):
        widget = self.itemsTreeDock.widget()
        widget.itemDoubleClicked.connect(self.maybe_show_item)
        widget.itemSelectionChanged.connect(self.view_update_ui)
        # TODO

    def load_options(self, filename):
        options = Config.read_main_window_options()
        if options.state is not None:
            self.restoreState(options.state)
        if options.geometry is not None:
            self.restoreGeometry(options.geometry)
        self.recent_files.load(options.recent_files)
        if (not filename and options.last_filename
                and pathlib.Path(options.last_filename).exists()):
            filename = options.last_filename
        if filename and not pathlib.Path(filename).exists():
            filename = None
        if filename:
            if options.last_filename:
                self.recent_files.add(options.last_filename)
            self.file_load(filename)
        else:
            self.statusBar().showMessage(
                'Click File→New or File→Open to open or create a database',
                TIMEOUT_LONG)
        return options

    def initalize_toggle_actions(self, options):
        self.itemsTreeDock.setVisible(options.show_items_tree)
        self.view_update_toggle_action(options.show_items_tree)
        show_pragmas = bool(self.db) and options.show_pragmas
        self.pragmasDock.setVisible(show_pragmas)
        self.view_pragmas_update_toggle_action(show_pragmas)
        self.mdiArea.setViewMode(
            QMdiArea.SubWindowView if options.show_as_tabs else
            QMdiArea.TabbedView)  # Start with the opposite
        self.view_items_tree_toggle_tabs()  # Toggle to correct & set action

    def update_ui(self):
        self.file_update_ui()
        self.edit_update_ui()
        self.view_update_ui()
        # TODO record & database & (sdi) window actions
        self.options_update_ui()

    def clear(self):
        self.maybe_save_ui()
        widget = self.pragmasDock.widget()
        widget.save(closing=self.closing)
        widget.clear()
        for widget in self.mdiArea.subWindowList():
            widget.close()  # Will save if dirty

    def findSubWindow(self, name):
        for widget in self.mdiArea.subWindowList():
            if widget.windowTitle() == name:
                return widget
Example #3
0
class MainWindow(QMainWindow):

    def __init__(self, parent=None):
        super().__init__(parent)

        self.setWindowIcon(QIcon(":/icons/apps/16/tabulator.svg"))

        self._recentDocuments = []
        self._actionRecentDocuments = []
        self._keyboardShortcutsDialog = None

        self._preferences = Preferences()
        self._preferences.loadSettings()

        self._createActions()
        self._createMenus()
        self._createToolBars()

        self._loadSettings()

        self._updateActions()
        self._updateActionFullScreen()
        self._updateMenuOpenRecent()

        # Central widget
        self._documentArea = QMdiArea()
        self._documentArea.setViewMode(QMdiArea.TabbedView)
        self._documentArea.setTabsMovable(True)
        self._documentArea.setTabsClosable(True)
        self.setCentralWidget(self._documentArea)
        self._documentArea.subWindowActivated.connect(self._onDocumentWindowActivated)


    def closeEvent(self, event):

        if True:
            # Store application properties and preferences
            self._saveSettings()
            self._preferences.saveSettings()

            event.accept()
        else:
            event.ignore()


    def _loadSettings(self):

        settings = QSettings()

        # Recent documents
        size = settings.beginReadArray("RecentDocuments")
        for idx in range(size-1, -1, -1):
            settings.setArrayIndex(idx)
            canonicalName = QFileInfo(settings.value("Document")).canonicalFilePath()
            self._updateRecentDocuments(canonicalName)
        settings.endArray()

        # Application properties: Geometry
        geometry = settings.value("Application/Geometry", QByteArray()) if self._preferences.restoreApplicationGeometry() else QByteArray()
        if not geometry.isEmpty():
            self.restoreGeometry(geometry)
        else:
            availableGeometry = self.screen().availableGeometry()
            self.resize(availableGeometry.width() * 2/3, availableGeometry.height() * 2/3)
            self.move((availableGeometry.width() - self.width()) / 2, (availableGeometry.height() - self.height()) / 2)

        # Application properties: State
        state = settings.value("Application/State", QByteArray()) if self._preferences.restoreApplicationState() else QByteArray()
        if not state.isEmpty():
            self.restoreState(state)
        else:
            self._toolbarApplication.setVisible(True)
            self._toolbarDocument.setVisible(True)
            self._toolbarEdit.setVisible(True)
            self._toolbarTools.setVisible(True)
            self._toolbarView.setVisible(False)
            self._toolbarHelp.setVisible(False)


    def _saveSettings(self):

        settings = QSettings()

        # Recent documents
        if not self._preferences.restoreRecentDocuments():
            self._recentDocuments.clear()
        settings.remove("RecentDocuments")
        settings.beginWriteArray("RecentDocuments")
        for idx in range(len(self._recentDocuments)):
            settings.setArrayIndex(idx)
            settings.setValue("Document", self._recentDocuments[idx])
        settings.endArray()

        # Application properties: Geometry
        geometry = self.saveGeometry() if self._preferences.restoreApplicationGeometry() else QByteArray()
        settings.setValue("Application/Geometry", geometry)

        # Application properties: State
        state = self.saveState() if self._preferences.restoreApplicationState() else QByteArray()
        settings.setValue("Application/State", state)


    def _createActions(self):

        #
        # Actions: Application

        self._actionAbout = QAction(self.tr("About {0}").format(QApplication.applicationName()), self)
        self._actionAbout.setObjectName("actionAbout")
        self._actionAbout.setIcon(QIcon(":/icons/apps/16/tabulator.svg"))
        self._actionAbout.setIconText(self.tr("About"))
        self._actionAbout.setToolTip(self.tr("Brief description of the application"))
        self._actionAbout.triggered.connect(self._onActionAboutTriggered)

        self._actionColophon = QAction(self.tr("Colophon"), self)
        self._actionColophon.setObjectName("actionColophon")
        self._actionColophon.setToolTip(self.tr("Lengthy description of the application"))
        self._actionColophon.triggered.connect(self._onActionColophonTriggered)

        self._actionPreferences = QAction(self.tr("Preferences…"), self)
        self._actionPreferences.setObjectName("actionPreferences")
        self._actionPreferences.setIcon(QIcon.fromTheme("configure", QIcon(":/icons/actions/16/application-configure.svg")))
        self._actionPreferences.setToolTip(self.tr("Customize the appearance and behavior of the application"))
        self._actionPreferences.triggered.connect(self._onActionPreferencesTriggered)

        self._actionQuit = QAction(self.tr("Quit"), self)
        self._actionQuit.setObjectName("actionQuit")
        self._actionQuit.setIcon(QIcon.fromTheme("application-exit", QIcon(":/icons/actions/16/application-exit.svg")))
        self._actionQuit.setShortcut(QKeySequence.Quit)
        self._actionQuit.setToolTip(self.tr("Quit the application"))
        self._actionQuit.triggered.connect(self.close)

        #
        # Actions: Document

        self._actionNew = QAction(self.tr("New"), self)
        self._actionNew.setObjectName("actionNew")
        self._actionNew.setIcon(QIcon.fromTheme("document-new", QIcon(":/icons/actions/16/document-new.svg")))
        self._actionNew.setShortcut(QKeySequence.New)
        self._actionNew.setToolTip(self.tr("Create new document"))
        self._actionNew.triggered.connect(self._onActionNewTriggered)

        self._actionOpen = QAction(self.tr("Open…"), self)
        self._actionOpen.setObjectName("actionOpen")
        self._actionOpen.setIcon(QIcon.fromTheme("document-open", QIcon(":/icons/actions/16/document-open.svg")))
        self._actionOpen.setShortcut(QKeySequence.Open)
        self._actionOpen.setToolTip(self.tr("Open an existing document"))
        self._actionOpen.triggered.connect(self._onActionOpenTriggered)

        self._actionOpenRecentClear = QAction(self.tr("Clear List"), self)
        self._actionOpenRecentClear.setObjectName("actionOpenRecentClear")
        self._actionOpenRecentClear.setToolTip(self.tr("Clear document list"))
        self._actionOpenRecentClear.triggered.connect(self._onActionOpenRecentClearTriggered)

        self._actionSave = QAction(self.tr("Save"), self)
        self._actionSave.setObjectName("actionSave")
        self._actionSave.setIcon(QIcon.fromTheme("document-save", QIcon(":/icons/actions/16/document-save.svg")))
        self._actionSave.setShortcut(QKeySequence.Save)
        self._actionSave.setToolTip(self.tr("Save document"))
        self._actionSave.triggered.connect(self._onActionSaveTriggered)

        self._actionSaveAs = QAction(self.tr("Save As…"), self)
        self._actionSaveAs.setObjectName("actionSaveAs")
        self._actionSaveAs.setIcon(QIcon.fromTheme("document-save-as", QIcon(":/icons/actions/16/document-save-as.svg")))
        self._actionSaveAs.setShortcut(QKeySequence.SaveAs)
        self._actionSaveAs.setToolTip(self.tr("Save document under a new name"))
        self._actionSaveAs.triggered.connect(self._onActionSaveAsTriggered)

        self._actionSaveAsDelimiterColon = QAction(self.tr("Colon"), self)
        self._actionSaveAsDelimiterColon.setObjectName("actionSaveAsDelimiterColon")
        self._actionSaveAsDelimiterColon.setCheckable(True)
        self._actionSaveAsDelimiterColon.setToolTip(self.tr("Save document with colon as delimiter under a new name"))
        self._actionSaveAsDelimiterColon.setData("colon")
        self._actionSaveAsDelimiterColon.triggered.connect(lambda: self._onActionSaveAsDelimiterTriggered("colon") )

        self._actionSaveAsDelimiterComma = QAction(self.tr("Comma"), self)
        self._actionSaveAsDelimiterComma.setObjectName("actionSaveAsDelimiterComma")
        self._actionSaveAsDelimiterComma.setCheckable(True)
        self._actionSaveAsDelimiterComma.setToolTip(self.tr("Save document with comma as delimiter under a new name"))
        self._actionSaveAsDelimiterComma.setData("comma")
        self._actionSaveAsDelimiterComma.triggered.connect(lambda: self._onActionSaveAsDelimiterTriggered("comma") )

        self._actionSaveAsDelimiterSemicolon = QAction(self.tr("Semicolon"), self)
        self._actionSaveAsDelimiterSemicolon.setObjectName("actionSaveAsDelimiterSemicolon")
        self._actionSaveAsDelimiterSemicolon.setCheckable(True)
        self._actionSaveAsDelimiterSemicolon.setToolTip(self.tr("Save document with semicolon as delimiter under a new name"))
        self._actionSaveAsDelimiterSemicolon.setData("semicolon")
        self._actionSaveAsDelimiterSemicolon.triggered.connect(lambda: self._onActionSaveAsDelimiterTriggered("semicolon") )

        self._actionSaveAsDelimiterTab = QAction(self.tr("Tab"), self)
        self._actionSaveAsDelimiterTab.setObjectName("actionSaveAsDelimiterTab")
        self._actionSaveAsDelimiterTab.setCheckable(True)
        self._actionSaveAsDelimiterTab.setToolTip(self.tr("Save document with tab as delimiter under a new name"))
        self._actionSaveAsDelimiterTab.setData("tab")
        self._actionSaveAsDelimiterTab.triggered.connect(lambda: self._onActionSaveAsDelimiterTriggered("tab") )

        self._actionSaveAsDelimiter = QActionGroup(self)
        self._actionSaveAsDelimiter.setObjectName("actionSaveAsDelimiter")
        self._actionSaveAsDelimiter.addAction(self._actionSaveAsDelimiterColon)
        self._actionSaveAsDelimiter.addAction(self._actionSaveAsDelimiterComma)
        self._actionSaveAsDelimiter.addAction(self._actionSaveAsDelimiterSemicolon)
        self._actionSaveAsDelimiter.addAction(self._actionSaveAsDelimiterTab)

        self._actionSaveCopyAs = QAction(self.tr("Save Copy As…"), self)
        self._actionSaveCopyAs.setObjectName("actionSaveCopyAs")
        self._actionSaveCopyAs.setIcon(QIcon.fromTheme("document-save-as", QIcon(":/icons/actions/16/document-save-as.svg")))
        self._actionSaveCopyAs.setToolTip(self.tr("Save copy of document under a new name"))
        self._actionSaveCopyAs.triggered.connect(self._onActionSaveCopyAsTriggered)

        self._actionSaveAll = QAction(self.tr("Save All"), self)
        self._actionSaveAll.setObjectName("actionSaveAll")
        self._actionSaveAll.setIcon(QIcon.fromTheme("document-save-all", QIcon(":/icons/actions/16/document-save-all.svg")))
        self._actionSaveAll.setShortcut(QKeySequence(Qt.CTRL + Qt.Key_L))
        self._actionSaveAll.setToolTip(self.tr("Save all documents"))
        self._actionSaveAll.triggered.connect(self._onActionSaveAllTriggered)

        self._actionClose = QAction(self.tr("Close"), self)
        self._actionClose.setObjectName("actionClose")
        self._actionClose.setIcon(QIcon.fromTheme("document-close", QIcon(":/icons/actions/16/document-close.svg")))
        self._actionClose.setShortcut(QKeySequence.Close)
        self._actionClose.setToolTip(self.tr("Close document"))
        self._actionClose.triggered.connect(self._onActionCloseTriggered)

        self._actionCloseOther = QAction(self.tr("Close Other"), self)
        self._actionCloseOther.setObjectName("actionCloseOther")
        self._actionCloseOther.setToolTip(self.tr("Close all other documents"))
        self._actionCloseOther.triggered.connect(self._onActionCloseOtherTriggered)

        self._actionCloseAll = QAction(self.tr("Close All"), self)
        self._actionCloseAll.setObjectName("actionCloseAll")
        self._actionCloseAll.setShortcut(QKeySequence(Qt.CTRL + Qt.SHIFT + Qt.Key_W))
        self._actionCloseAll.setToolTip(self.tr("Close all documents"))
        self._actionCloseAll.triggered.connect(self._onActionCloseAllTriggered)

        #
        # Actions: View

        self._actionFullScreen = QAction(self)
        self._actionFullScreen.setObjectName("actionFullScreen")
        self._actionFullScreen.setIconText(self.tr("Full Screen"))
        self._actionFullScreen.setCheckable(True)
        self._actionFullScreen.setShortcuts([QKeySequence(Qt.Key_F11), QKeySequence.FullScreen])
        self._actionFullScreen.triggered.connect(self._onActionFullScreenTriggered)

        self._actionTitlebarFullPath = QAction(self.tr("Show Path in Titlebar"), self)
        self._actionTitlebarFullPath.setObjectName("actionTitlebarFullPath")
        self._actionTitlebarFullPath.setCheckable(True)
        self._actionTitlebarFullPath.setChecked(True)
        self._actionTitlebarFullPath.setToolTip(self.tr("Display the full path of the document in the titlebar"))
        self._actionTitlebarFullPath.triggered.connect(self._onActionTitlebarFullPathTriggered)

        self._actionToolbarApplication = QAction(self.tr("Show Application Toolbar"), self)
        self._actionToolbarApplication.setObjectName("actionToolbarApplication")
        self._actionToolbarApplication.setCheckable(True)
        self._actionToolbarApplication.setToolTip(self.tr("Display the Application toolbar"))
        self._actionToolbarApplication.toggled.connect(lambda checked: self._toolbarApplication.setVisible(checked))

        self._actionToolbarDocument = QAction(self.tr("Show Document Toolbar"), self)
        self._actionToolbarDocument.setObjectName("actionToolbarDocument")
        self._actionToolbarDocument.setCheckable(True)
        self._actionToolbarDocument.setToolTip(self.tr("Display the Document toolbar"))
        self._actionToolbarDocument.toggled.connect(lambda checked: self._toolbarDocument.setVisible(checked))

        self._actionToolbarEdit = QAction(self.tr("Show Edit Toolbar"), self)
        self._actionToolbarEdit.setObjectName("actionToolbarEdit")
        self._actionToolbarEdit.setCheckable(True)
        self._actionToolbarEdit.setToolTip(self.tr("Display the Edit toolbar"))
        self._actionToolbarEdit.toggled.connect(lambda checked: self._toolbarEdit.setVisible(checked))

        self._actionToolbarTools = QAction(self.tr("Show Tools Toolbar"), self)
        self._actionToolbarTools.setObjectName("actionToolbarTools")
        self._actionToolbarTools.setCheckable(True)
        self._actionToolbarTools.setToolTip(self.tr("Display the Tools toolbar"))
        self._actionToolbarTools.toggled.connect(lambda checked: self._toolbarTools.setVisible(checked))

        self._actionToolbarView = QAction(self.tr("Show View Toolbar"), self)
        self._actionToolbarView.setObjectName("actionToolbarView")
        self._actionToolbarView.setCheckable(True)
        self._actionToolbarView.setToolTip(self.tr("Display the View toolbar"))
        self._actionToolbarView.toggled.connect(lambda checked: self._toolbarView.setVisible(checked))

        self._actionToolbarHelp = QAction(self.tr("Show Help Toolbar"), self)
        self._actionToolbarHelp.setObjectName("actionToolbarHelp")
        self._actionToolbarHelp.setCheckable(True)
        self._actionToolbarHelp.setToolTip(self.tr("Display the Help toolbar"))
        self._actionToolbarHelp.toggled.connect(lambda checked: self._toolbarHelp.setVisible(checked))

        #
        # Actions: Help

        self._actionKeyboardShortcuts = QAction(self.tr("Keyboard Shortcuts"), self)
        self._actionKeyboardShortcuts.setObjectName("actionKeyboardShortcuts")
        self._actionKeyboardShortcuts.setIcon(QIcon.fromTheme("help-keyboard-shortcuts", QIcon(":/icons/actions/16/help-keyboard-shortcuts.svg")))
        self._actionKeyboardShortcuts.setIconText(self.tr("Shortcuts"))
        self._actionKeyboardShortcuts.setToolTip(self.tr("List of all keyboard shortcuts"))
        self._actionKeyboardShortcuts.triggered.connect(self._onActionKeyboardShortcutsTriggered)


    def _createMenus(self):

        # Menu: Application
        menuApplication = self.menuBar().addMenu(self.tr("Application"))
        menuApplication.setObjectName("menuApplication")
        menuApplication.addAction(self._actionAbout)
        menuApplication.addAction(self._actionColophon)
        menuApplication.addSeparator()
        menuApplication.addAction(self._actionPreferences)
        menuApplication.addSeparator()
        menuApplication.addAction(self._actionQuit)

        #
        # Menu: Document

        self._menuOpenRecent = QMenu(self.tr("Open Recent"), self)
        self._menuOpenRecent.setObjectName("menuOpenRecent")
        self._menuOpenRecent.setIcon(QIcon.fromTheme("document-open-recent", QIcon(":/icons/actions/16/document-open-recent.svg")))
        self._menuOpenRecent.setToolTip(self.tr("Open a document which was recently opened"))

        self._menuSaveAsDelimiter = QMenu(self.tr("Save As with Delimiter…"), self)
        self._menuSaveAsDelimiter.setObjectName("menuSaveAsDelimiter")
        self._menuSaveAsDelimiter.setIcon(QIcon.fromTheme("document-save-as", QIcon(":/icons/actions/16/document-save-as.svg")))
        self._menuSaveAsDelimiter.setToolTip(self.tr("Save document with specific delimiter under a new name"))
        self._menuSaveAsDelimiter.addActions(self._actionSaveAsDelimiter.actions())

        menuDocument = self.menuBar().addMenu(self.tr("Document"))
        menuDocument.setObjectName("menuDocument")
        menuDocument.addAction(self._actionNew)
        menuDocument.addSeparator()
        menuDocument.addAction(self._actionOpen)
        menuDocument.addMenu(self._menuOpenRecent)
        menuDocument.addSeparator()
        menuDocument.addAction(self._actionSave)
        menuDocument.addAction(self._actionSaveAs)
        menuDocument.addMenu(self._menuSaveAsDelimiter)
        menuDocument.addAction(self._actionSaveCopyAs)
        menuDocument.addAction(self._actionSaveAll)
        menuDocument.addSeparator()
        menuDocument.addAction(self._actionClose)
        menuDocument.addAction(self._actionCloseOther)
        menuDocument.addAction(self._actionCloseAll)

        # Menu: Edit
        menuEdit = self.menuBar().addMenu(self.tr("Edit"))
        menuEdit.setObjectName("menuEdit")

        # Menu: Tools
        menuTools = self.menuBar().addMenu(self.tr("Tools"))
        menuTools.setObjectName("menuTools")

        # Menu: View
        menuView = self.menuBar().addMenu(self.tr("View"))
        menuView.setObjectName("menuView")
        menuView.addAction(self._actionFullScreen)
        menuView.addSeparator()
        menuView.addAction(self._actionTitlebarFullPath)
        menuView.addSeparator()
        menuView.addAction(self._actionToolbarApplication)
        menuView.addAction(self._actionToolbarDocument)
        menuView.addAction(self._actionToolbarEdit)
        menuView.addAction(self._actionToolbarTools)
        menuView.addAction(self._actionToolbarView)
        menuView.addAction(self._actionToolbarHelp)

        # Menu: Help
        menuHelp = self.menuBar().addMenu(self.tr("Help"))
        menuHelp.setObjectName("menuHelp")
        menuHelp.addAction(self._actionKeyboardShortcuts)


    def _createToolBars(self):

        # Toolbar: Application
        self._toolbarApplication = self.addToolBar(self.tr("Application Toolbar"))
        self._toolbarApplication.setObjectName("toolbarApplication")
        self._toolbarApplication.addAction(self._actionAbout)
        self._toolbarApplication.addAction(self._actionPreferences)
        self._toolbarApplication.addSeparator()
        self._toolbarApplication.addAction(self._actionQuit)
        self._toolbarApplication.visibilityChanged.connect(lambda visible: self._actionToolbarApplication.setChecked(visible))

        # Toolbar: Document
        self._toolbarDocument = self.addToolBar(self.tr("Document Toolbar"))
        self._toolbarDocument.setObjectName("toolbarDocument")
        self._toolbarDocument.addAction(self._actionNew)
        self._toolbarDocument.addAction(self._actionOpen)
        self._toolbarDocument.addSeparator()
        self._toolbarDocument.addAction(self._actionSave)
        self._toolbarDocument.addAction(self._actionSaveAs)
        self._toolbarDocument.addSeparator()
        self._toolbarDocument.addAction(self._actionClose)
        self._toolbarDocument.visibilityChanged.connect(lambda visible: self._actionToolbarDocument.setChecked(visible))

        # Toolbar: Edit
        self._toolbarEdit = self.addToolBar(self.tr("Edit Toolbar"))
        self._toolbarEdit.setObjectName("toolbarEdit")
        self._toolbarEdit.visibilityChanged.connect(lambda visible: self._actionToolbarEdit.setChecked(visible))

        # Toolbar: Tools
        self._toolbarTools = self.addToolBar(self.tr("Tools Toolbar"))
        self._toolbarTools.setObjectName("toolbarTools")
        self._toolbarTools.visibilityChanged.connect(lambda visible: self._actionToolbarTools.setChecked(visible))

        # Toolbar: View
        self._toolbarView = self.addToolBar(self.tr("View Toolbar"))
        self._toolbarView.setObjectName("toolbarView")
        self._toolbarView.addAction(self._actionFullScreen)
        self._toolbarView.visibilityChanged.connect(lambda visible: self._actionToolbarView.setChecked(visible))

        # Toolbar: Help
        self._toolbarHelp = self.addToolBar(self.tr("Help Toolbar"))
        self._toolbarHelp.setObjectName("toolbarHelp")
        self._toolbarHelp.addAction(self._actionKeyboardShortcuts)
        self._toolbarHelp.visibilityChanged.connect(lambda visible: self._actionToolbarHelp.setChecked(visible))


    def _updateActions(self, subWindowCount=0):

        hasDocument = subWindowCount >= 1
        hasDocuments = subWindowCount >= 2

        # Actions: Document
        self._actionSave.setEnabled(hasDocument)
        self._actionSaveAs.setEnabled(hasDocument)
        self._menuSaveAsDelimiter.setEnabled(hasDocument)
        self._actionSaveCopyAs.setEnabled(hasDocument)
        self._actionSaveAll.setEnabled(hasDocument)
        self._actionClose.setEnabled(hasDocument)
        self._actionCloseOther.setEnabled(hasDocuments)
        self._actionCloseAll.setEnabled(hasDocument)


    def _updateActionFullScreen(self):

        if not self.isFullScreen():
            self._actionFullScreen.setText(self.tr("Full Screen Mode"))
            self._actionFullScreen.setIcon(QIcon.fromTheme("view-fullscreen", QIcon(":/icons/actions/16/view-fullscreen.svg")))
            self._actionFullScreen.setChecked(False)
            self._actionFullScreen.setToolTip(self.tr("Display the window in full screen"))
        else:
            self._actionFullScreen.setText(self.tr("Exit Full Screen Mode"))
            self._actionFullScreen.setIcon(QIcon.fromTheme("view-restore", QIcon(":/icons/actions/16/view-restore.svg")))
            self._actionFullScreen.setChecked(True)
            self._actionFullScreen.setToolTip(self.tr("Exit the full screen mode"))


    def _updateActionRecentDocuments(self):

        # Add items to the list, if necessary
        for idx in range(len(self._actionRecentDocuments)+1, self._preferences.maximumRecentDocuments()+1):

            actionRecentDocument = QAction(self)
            actionRecentDocument.setObjectName(f"actionRecentDocument_{idx}")
            actionRecentDocument.triggered.connect(lambda data=actionRecentDocument.data(): self._onActionOpenRecentDocumentTriggered(data))

            self._actionRecentDocuments.append(actionRecentDocument)

        # Remove items from the list, if necessary
        while len(self._actionRecentDocuments) > self._preferences.maximumRecentDocuments():
            self._actionRecentDocuments.pop()

        # Update items
        for idx in range(len(self._actionRecentDocuments)):
            text = None
            data = None
            show = False

            if idx < len(self._recentDocuments):
                text = self.tr("{0} [{1}]").format(QFileInfo(self._recentDocuments[idx]).fileName(), self._recentDocuments[idx])
                data = self._recentDocuments[idx]
                show = True

            self._actionRecentDocuments[idx].setText(text)
            self._actionRecentDocuments[idx].setData(data)
            self._actionRecentDocuments[idx].setVisible(show)


    def _updateMenuOpenRecent(self):

        self._menuOpenRecent.clear()

        if self._preferences.maximumRecentDocuments() > 0:
            # Document list wanted; show the menu
            self._menuOpenRecent.menuAction().setVisible(True)

            if len(self._recentDocuments) > 0:
                # Document list has items; enable the menu
                self._menuOpenRecent.setEnabled(True)

                self._menuOpenRecent.addActions(self._actionRecentDocuments)
                self._menuOpenRecent.addSeparator()
                self._menuOpenRecent.addAction(self._actionOpenRecentClear)
            else:
                # Document list is empty; disable the menu
                self._menuOpenRecent.setEnabled(False)
        else:
            # No document list wanted; hide the menu
            self._menuOpenRecent.menuAction().setVisible(False)


    def _updateTitleBar(self):

        title = None

        document = self._activeDocument()
        if document:
            title = document.canonicalName() if self._actionTitlebarFullPath.isChecked() and document.canonicalName() else document.documentTitle()

        self.setWindowTitle(title)


    def _onActionAboutTriggered(self):

        dialog = AboutDialog(self)
        dialog.exec_()


    def _onActionColophonTriggered(self):

        dialog = ColophonDialog(self)
        dialog.exec_()


    def _onActionPreferencesTriggered(self):

        dialog = PreferencesDialog(self)
        dialog.setPreferences(self._preferences)
        dialog.exec_()

        self._preferences = dialog.preferences()

        self._updateRecentDocuments(None)
        self._updateMenuOpenRecent()


    def _onActionNewTriggered(self):

        self._loadDocument("")


    def _onActionOpenTriggered(self):

        fileNames = QFileDialog.getOpenFileNames(self, self.tr("Open Document"),
                        QStandardPaths.writableLocation(QStandardPaths.HomeLocation),
                        self.tr("CSV Files (*.csv);;All Files (*.*)"))[0]

        for fileName in fileNames:
            self._openDocument(fileName)


    def _onActionOpenRecentDocumentTriggered(self, canonicalName):
        pass

#        self.openDocument(canonicalName)


    def _onActionOpenRecentClearTriggered(self):

        self._recentDocuments.clear()

        self._updateRecentDocuments(None)
        self._updateMenuOpenRecent()


    def _onActionSaveTriggered(self):
        pass


    def _onActionSaveAsTriggered(self):
        pass


    def _onActionSaveAsDelimiterTriggered(self, delimiter):
        pass


    def _onActionSaveCopyAsTriggered(self):
        pass


    def _onActionSaveAllTriggered(self):
        pass


    def _onActionCloseTriggered(self):

        self._documentArea.closeActiveSubWindow()


    def _onActionCloseOtherTriggered(self):

        for subWindow in self._documentArea.subWindowList():
            if subWindow != self._documentArea.activeSubWindow():
                subWindow.close()


    def _onActionCloseAllTriggered(self):

        self._documentArea.closeAllSubWindows()


    def _onActionFullScreenTriggered(self):

        if not self.isFullScreen():
            self.setWindowState(self.windowState() | Qt.WindowFullScreen)
        else:
            self.setWindowState(self.windowState() & ~Qt.WindowFullScreen)

        self._updateActionFullScreen()


    def _onActionTitlebarFullPathTriggered(self):

        self._updateTitleBar()


    def _onActionKeyboardShortcutsTriggered(self):

        if not self._keyboardShortcutsDialog:
            self._keyboardShortcutsDialog = KeyboardShortcutsDialog(self)

        self._keyboardShortcutsDialog.show()
        self._keyboardShortcutsDialog.raise_()
        self._keyboardShortcutsDialog.activateWindow()


    def _onDocumentWindowActivated(self, subWindow):

        # Update the application window
        self._updateActions(len(self._documentArea.subWindowList()))
        self._updateTitleBar()

        if not subWindow:
            return


    def _onDocumentAboutToClose(self, canonicalName):

        # Workaround to show subwindows always maximized
        for subWindow in self._documentArea.subWindowList():
            if not subWindow.isMaximized():
                subWindow.showMaximized()

        # Update menu items without the emitter
        self._updateActions(len(self._documentArea.subWindowList()) - 1)


    def _createDocument(self):

        document = Document()
        document.setPreferences(self._preferences)
        document.aboutToClose.connect(self._onDocumentAboutToClose)

        subWindow = self._documentArea.addSubWindow(document)
        subWindow.setWindowIcon(QIcon())
        subWindow.showMaximized()

        return document


    def _createDocumentIndex(self, canonicalName):

        fileName = QFileInfo(canonicalName).fileName()
        canonicalIndex = 0

        for subWindow in self._documentArea.subWindowList():
            if QFileInfo(subWindow.widget().canonicalName()).fileName() == fileName:
                if subWindow.widget().canonicalIndex() > canonicalIndex:
                    canonicalIndex = subWindow.widget().canonicalIndex()

        return canonicalIndex + 1


    def _findDocumentWindow(self, canonicalName):

        for subWindow in self._documentArea.subWindowList():
            if subWindow.widget().canonicalName() == canonicalName:
                return subWindow

        return None


    def _activeDocument(self):

        subWindow = self._documentArea.activeSubWindow()

        return subWindow.widget() if subWindow else None


    def _openDocument(self, fileName):

        canonicalName = QFileInfo(fileName).canonicalFilePath()

        subWindow = self._findDocumentWindow(canonicalName)
        if subWindow:
            # Given document is already loaded; activate the subwindow
            self._documentArea.setActiveSubWindow(subWindow)

            # Update list of recent documents
            self._updateRecentDocuments(canonicalName)
            self._updateMenuOpenRecent()
            return True

        return self._loadDocument(canonicalName);


    def _loadDocument(self, canonicalName):

        document = self._createDocument()

        succeeded = document.load(canonicalName)
        if succeeded:
            document.setCanonicalIndex(self._createDocumentIndex(canonicalName))
            document.updateDocumentTitle()
            document.show()

            # Update list of recent documents
            self._updateRecentDocuments(canonicalName)
            self._updateMenuOpenRecent()

            # Update the application window
            self._updateActions(len(self._documentArea.subWindowList()))
            self._updateTitleBar()
        else:
            document.close()

        return succeeded


    def _updateRecentDocuments(self, canonicalName):

        if canonicalName:
            while canonicalName in self._recentDocuments:
                self._recentDocuments.remove(canonicalName)
            self._recentDocuments.insert(0, canonicalName)

        # Remove items from the list, if necessary
        while len(self._recentDocuments) > self._preferences.maximumRecentDocuments():
            self._recentDocuments.pop()

        self._updateActionRecentDocuments()