Python PyQt4.QtGui 模块，QActionGroup() 实例源码

def init_menu (self):
        """Add menu entries for bookmark file checking."""
        self.urlinput.addMenuEntries(self.menuEdit)
        self.menuLang = self.menuEdit.addMenu(_('Languages'))
        self.menuLang.setTitle(_("&Language"))
        # ensure only one action is checked
        langActionGroup = QtGui.QActionGroup(self)
        langActionGroup.triggered.connect(self.switch_language)
        for i, lang in enumerate(sorted(i18n.supported_languages)):
            action = self.menuLang.addAction("&%d %s" % (i, lang))
            action.setCheckable(True)
            action.setData(lang)
            if lang == i18n.default_language:
                action.setChecked(True)
            langActionGroup.addAction(action)

def init_UI(self):
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.setWindowTitle('Dragonfly Frame Viewer')
        window = QtWidgets.QWidget()

        self.hbox = QtWidgets.QHBoxLayout()
        self.frame_panel = frame_panel.Frame_panel(self, powder=self.do_powder, compare=self.do_compare)
        self.hbox.addWidget(self.frame_panel)

        # Menu items
        menubar = self.menuBar()
        menubar.setNativeMenuBar(False)
        # Theme picker
        thememenu = menubar.addMenu('&Theme')
        self.theme = QtWidgets.QActionGroup(self, exclusive=True)
        for i, s in enumerate(map(str, list(QtWidgets.QStyleFactory.keys()))):
            a = self.theme.addAction(QtWidgets.QAction(s, self, checkable=True))
            if i == 0:
                a.setChecked(True)
            a.triggered.connect(self.theme_changed)
            thememenu.addAction(a)
        # Color map picker
        cmapmenu = menubar.addMenu('&Color Map')
        self.color_map = QtWidgets.QActionGroup(self, exclusive=True)
        for i, s in enumerate(['cubehelix', 'CMRmap', 'gray', 'gray_r', 'jet']):
            a = self.color_map.addAction(QtWidgets.QAction(s, self, checkable=True))
            if i == 0:
                a.setChecked(True)
            a.triggered.connect(self.cmap_changed)
            cmapmenu.addAction(a)

        window.setLayout(self.hbox)
        self.setCentralWidget(window)
        self.show()

def _buildMenu(self):
        self.framelessCheck = QtGui.QAction("Frameless Window", self, checkable=True)
        self.connect(self.framelessCheck, SIGNAL("triggered()"), self.trayIcon.changeFrameless)
        self.addAction(self.framelessCheck)
        self.addSeparator()
        self.requestCheck = QtGui.QAction("Show status request notifications", self, checkable=True)
        self.requestCheck.setChecked(True)
        self.addAction(self.requestCheck)
        self.connect(self.requestCheck, SIGNAL("triggered()"), self.trayIcon.switchRequest)
        self.alarmCheck = QtGui.QAction("Show alarm notifications", self, checkable=True)
        self.alarmCheck.setChecked(True)
        self.connect(self.alarmCheck, SIGNAL("triggered()"), self.trayIcon.switchAlarm)
        self.addAction(self.alarmCheck)
        distanceMenu = self.addMenu("Alarm Distance")
        self.distanceGroup = QActionGroup(self)
        for i in range(0, 6):
            action = QAction("{0} Jumps".format(i), None, checkable=True)
            if i == 0:
                action.setChecked(True)
            action.alarmDistance = i
            self.connect(action, SIGNAL("triggered()"), self.changeAlarmDistance)
            self.distanceGroup.addAction(action)
            distanceMenu.addAction(action)
        self.addMenu(distanceMenu)
        self.addSeparator()
        self.quitAction = QAction("Quit", self)
        self.connect(self.quitAction, SIGNAL("triggered()"), self.trayIcon.quit)
        self.addAction(self.quitAction)

def init_UI(self):
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.setWindowTitle('Dragonfly Classifier')
        self.setGeometry(0,0,1100,900)
        window = QtWidgets.QWidget()
        hbox = QtWidgets.QHBoxLayout()
        hbox.setSpacing(0)

        self.frame_panel = frame_panel.Frame_panel(self)
        hbox.addWidget(self.frame_panel)

        window.setLayout(hbox)
        self.setCentralWidget(window)
        self.show()

        self.manual_panel = manual.Manual_panel(self)
        self.conversion_panel = conversion.Conversion_panel(self)
        self.embedding_panel = embedding.Embedding_panel(self)
        self.mlp_panel = mlp.MLP_panel(self)

        # Menu items
        menubar = self.menuBar()
        menubar.setNativeMenuBar(False)
        # Theme picker
        thememenu = menubar.addMenu('&Theme')
        self.theme = QtWidgets.QActionGroup(self, exclusive=True)
        for i, s in enumerate(map(str, list(QtWidgets.QStyleFactory.keys()))):
            a = self.theme.addAction(QtWidgets.QAction(s, self, checkable=True))
            if i == 0:
                a.setChecked(True)
            a.triggered.connect(self.theme_changed)
            thememenu.addAction(a)
        # Color map picker
        cmapmenu = menubar.addMenu('&Color Map')
        self.color_map = QtWidgets.QActionGroup(self, exclusive=True)
        for i, s in enumerate(['cubehelix', 'CMRmap', 'gray', 'gray_r', 'jet']):
            a = self.color_map.addAction(QtWidgets.QAction(s, self, checkable=True))
            if i == 0:
                a.setChecked(True)
            a.triggered.connect(self.cmap_changed)
            cmapmenu.addAction(a)

        toolbox = QtWidgets.QToolBox(self)
        hbox.addWidget(toolbox)
        toolbox.setFixedWidth(300)
        toolbox.addItem(QtWidgets.QWidget(self), '&Display')
        toolbox.addItem(self.manual_panel, '&Manual')
        toolbox.addItem(self.conversion_panel, '&Conversion')
        toolbox.addItem(self.embedding_panel, '&Embedding')
        toolbox.addItem(self.mlp_panel, 'M&LP')
        toolbox.currentChanged.connect(self.tab_changed)