Python progress_indicator.ProgressIndicator类代码示例

    def __init__(self, msg, args, db, ids, cc_widgets, s_r_func,
                 parent=None, window_title=_('Working')):
        QDialog.__init__(self, parent)

        self._layout = QVBoxLayout()
        self.setLayout(self._layout)
        self.msg_text = msg
        self.msg = QLabel(msg+'        ') # Ensure dialog is wide enough
        #self.msg.setWordWrap(True)
        self.font = QFont()
        self.font.setPointSize(self.font.pointSize() + 8)
        self.msg.setFont(self.font)
        self.pi = ProgressIndicator(self)
        self.pi.setDisplaySize(100)
        self._layout.addWidget(self.pi, 0, Qt.AlignHCenter)
        self._layout.addSpacing(15)
        self._layout.addWidget(self.msg, 0, Qt.AlignHCenter)
        self.setWindowTitle(window_title)
        self.resize(self.sizeHint())
        self.start()

        self.args = args
        self.series_start_value = None
        self.db = db
        self.ids = ids
        self.error = None
        self.cc_widgets = cc_widgets
        self.s_r_func = s_r_func
        self.do_one_signal.connect(self.do_one_safe, Qt.QueuedConnection)

    def __init__(self, args, ids, db, refresh_books, cc_widgets, s_r_func, do_sr, sr_calls, parent=None, window_title=_('Working')):
        QDialog.__init__(self, parent)

        self._layout =  l = QVBoxLayout()
        self.setLayout(l)

        self.msg = QLabel(_('Processing %d books, please wait...') % len(ids))
        self.font = QFont()
        self.font.setPointSize(self.font.pointSize() + 8)
        self.msg.setFont(self.font)
        self.pi = ProgressIndicator(self)
        self.pi.setDisplaySize(100)
        self._layout.addWidget(self.pi, 0, Qt.AlignHCenter)
        self._layout.addSpacing(15)
        self._layout.addWidget(self.msg, 0, Qt.AlignHCenter)
        self.setWindowTitle(window_title + '...')
        self.setMinimumWidth(200)
        self.resize(self.sizeHint())
        self.error = None
        self.all_done.connect(self.on_all_done, type=Qt.QueuedConnection)
        self.args, self.ids = args, ids
        self.db, self.cc_widgets = db, cc_widgets
        self.s_r_func = FunctionDispatcher(s_r_func)
        self.do_sr = do_sr
        self.sr_calls = sr_calls
        self.refresh_books = refresh_books

    def __init__(self, horizontal=False, size=48, parent=None):
        QFrame.__init__(self, parent)
        if horizontal:
            size = 24
        self.pi = ProgressIndicator(self, size)
        self._jobs = QLabel('<b>'+_('Jobs:')+' 0')
        self._jobs.mouseReleaseEvent = self.mouseReleaseEvent
        self.shortcut = _('Shift+Alt+J')

        if horizontal:
            self.setLayout(QHBoxLayout())
            self.layout().setDirection(self.layout().RightToLeft)
        else:
            self.setLayout(QVBoxLayout())
            self._jobs.setAlignment(Qt.AlignHCenter|Qt.AlignBottom)

        self.layout().addWidget(self.pi)
        self.layout().addWidget(self._jobs)
        if not horizontal:
            self.layout().setAlignment(self._jobs, Qt.AlignHCenter)
        self._jobs.setMargin(0)
        self.layout().setMargin(0)
        self._jobs.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum)
        self.setCursor(Qt.PointingHandCursor)
        b = _('Click to see list of jobs')
        self.setToolTip(b + u' (%s)'%self.shortcut)
        self.action_toggle = QAction(b, parent)
        parent.addAction(self.action_toggle)
        self.action_toggle.setShortcut(self.shortcut)
        self.action_toggle.triggered.connect(self.toggle)

 def __init__(self, parent=None):
     QWidget.__init__(self, parent)
     self.l = l = QHBoxLayout(self)
     self.setLayout(l)
     self.label = QLabel('')
     self.pi = ProgressIndicator(self, 24)
     l.addWidget(self.label)
     l.addWidget(self.pi)
     l.setContentsMargins(0, 0, 0, 0)
     self.pi.setVisible(False)
     self.stop()

class BlockingBusy(QDialog):

    def __init__(self, msg, parent=None, window_title=_('Working')):
        QDialog.__init__(self, parent)

        self._layout = QVBoxLayout()
        self.setLayout(self._layout)
        self.msg = QLabel(msg)
        # self.msg.setWordWrap(True)
        self.font = QFont()
        self.font.setPointSize(self.font.pointSize() + 8)
        self.msg.setFont(self.font)
        self.pi = ProgressIndicator(self)
        self.pi.setDisplaySize(100)
        self._layout.addWidget(self.pi, 0, Qt.AlignHCenter)
        self._layout.addSpacing(15)
        self._layout.addWidget(self.msg, 0, Qt.AlignHCenter)
        self.start()
        self.setWindowTitle(window_title)
        self.resize(self.sizeHint())

    def start(self):
        self.pi.startAnimation()

    def stop(self):
        self.pi.stopAnimation()

    def accept(self):
        self.stop()
        return QDialog.accept(self)

    def reject(self):
        pass  # Cannot cancel this dialog

 def __init__(self, parent):
     QWidget.__init__(self, parent)
     l = QVBoxLayout()
     self.setLayout(l)
     l.addStretch(10)
     self.pi = ProgressIndicator(self, 128)
     l.addWidget(self.pi, alignment=Qt.AlignHCenter)
     self.dummy = QLabel('<h2>\xa0')
     l.addSpacing(10)
     l.addWidget(self.dummy, alignment=Qt.AlignHCenter)
     l.addStretch(10)
     self.setVisible(False)
     self.text = ''

class SaveWidget(QWidget):

    def __init__(self, parent=None):
        QWidget.__init__(self, parent)
        self.l = l = QHBoxLayout(self)
        self.setLayout(l)
        self.label = QLabel('')
        self.pi = ProgressIndicator(self, 24)
        l.addWidget(self.label)
        l.addWidget(self.pi)
        l.setContentsMargins(0, 0, 0, 0)
        self.pi.setVisible(False)
        self.stop()

    def start(self):
        self.pi.setVisible(True)
        self.pi.startAnimation()
        self.label.setText(_('Saving...'))

    def stop(self):
        self.pi.setVisible(False)
        self.pi.stopAnimation()
        self.label.setText(_('Saved'))

    def __init__(self, msg, parent=None, window_title=_('Working')):
        QDialog.__init__(self, parent)

        self._layout = QVBoxLayout()
        self.setLayout(self._layout)
        self.msg = QLabel(msg)
        # self.msg.setWordWrap(True)
        self.font = QFont()
        self.font.setPointSize(self.font.pointSize() + 8)
        self.msg.setFont(self.font)
        self.pi = ProgressIndicator(self)
        self.pi.setDisplaySize(100)
        self._layout.addWidget(self.pi, 0, Qt.AlignHCenter)
        self._layout.addSpacing(15)
        self._layout.addWidget(self.msg, 0, Qt.AlignHCenter)
        self.start()
        self.setWindowTitle(window_title)
        self.resize(self.sizeHint())

    def __init__(self, gui, msg, size=100, window_title="Marvin XD", show_cancel=False, on_top=False):
        flags = Qt.FramelessWindowHint
        if on_top:
            flags = Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint
        QDialog.__init__(self, gui, flags)

        self._layout = QVBoxLayout()
        self.setLayout(self._layout)
        self.cancel_status = 0
        self.is_running = False

        # Add the spinner
        self.pi = ProgressIndicator(self)
        self.pi.setDisplaySize(size)
        self._layout.addSpacing(15)
        self._layout.addWidget(self.pi, 0, Qt.AlignHCenter)
        self._layout.addSpacing(15)

        # Fiddle with the message
        self.msg = QLabel(msg)
        # self.msg.setWordWrap(True)
        self.font = QFont()
        self.font.setPointSize(self.font.pointSize() + 2)
        self.msg.setFont(self.font)
        self._layout.addWidget(self.msg, 0, Qt.AlignHCenter)
        sp = QSizePolicy()
        sp.setHorizontalStretch(True)
        sp.setVerticalStretch(False)
        sp.setHeightForWidth(False)
        self.msg.setSizePolicy(sp)
        self.msg.setMinimumHeight(self.font.pointSize() + 8)

        self._layout.addSpacing(15)

        if show_cancel:
            self.bb = QDialogButtonBox()
            self.cancel_button = QPushButton(QIcon(I("window-close.png")), "Cancel")
            self.bb.addButton(self.cancel_button, self.bb.RejectRole)
            self.bb.clicked.connect(self.button_handler)
            self._layout.addWidget(self.bb)

        self.setWindowTitle(window_title)
        self.resize(self.sizeHint())

    def __init__(self, parent=None):
        QWidget.__init__(self, parent)
        self.mouse_over = False
        self.pi = ProgressIndicator(self, self.style().pixelMetric(QStyle.PM_ToolBarIconSize))
        self._jobs = QLabel('<b>'+_('Jobs:')+' 0 ')
        self._jobs.mouseReleaseEvent = self.mouseReleaseEvent
        self.shortcut = 'Alt+Shift+J'

        self.l = l = QHBoxLayout(self)
        l.setSpacing(3)
        l.addWidget(self.pi)
        l.addWidget(self._jobs)
        m = self.style().pixelMetric(QStyle.PM_DefaultFrameWidth)
        self.layout().setContentsMargins(m, m, m, m)
        self._jobs.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum)
        self.setCursor(Qt.PointingHandCursor)
        b = _('Click to see list of jobs')
        self.setToolTip(b + u' [%s]'%self.shortcut)
        self.action_toggle = QAction(b, parent)
        parent.addAction(self.action_toggle)
        self.action_toggle.triggered.connect(self.toggle)
        if hasattr(parent, 'keyboard'):
            parent.keyboard.register_shortcut('toggle jobs list', _('Show/hide the Jobs List'), default_keys=(self.shortcut,), action=self.action_toggle)

class BlockingJob(QWidget):

    def __init__(self, parent):
        QWidget.__init__(self, parent)
        l = QVBoxLayout()
        self.setLayout(l)
        l.addStretch(10)
        self.pi = ProgressIndicator(self, 128)
        l.addWidget(self.pi, alignment=Qt.AlignHCenter)
        self.dummy = QLabel('<h2>\xa0')
        l.addSpacing(10)
        l.addWidget(self.dummy, alignment=Qt.AlignHCenter)
        l.addStretch(10)
        self.setVisible(False)
        self.text = ''
        self.setFocusPolicy(Qt.NoFocus)

    def start(self):
        self.setGeometry(0, 0, self.parent().width(), self.parent().height())
        self.setVisible(True)
        # Prevent any actions from being triggerred by key presses
        self.parent().setEnabled(False)
        self.raise_()
        self.setFocus(Qt.OtherFocusReason)
        self.pi.startAnimation()
        QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))

    def stop(self):
        QApplication.restoreOverrideCursor()
        self.pi.stopAnimation()
        self.setVisible(False)
        self.parent().setEnabled(True)
        # The following line is needed on OS X, because of this bug:
        # https://bugreports.qt-project.org/browse/QTBUG-34371 it causes
        # keyboard events to no longer work
        self.parent().setFocus(Qt.OtherFocusReason)

    def job_done(self, callback, job):
        del job.callback
        self.stop()
        callback(job)

    def paintEvent(self, ev):
        br = ev.region().boundingRect()
        p = QPainter(self)
        p.setOpacity(0.2)
        p.fillRect(br, QBrush(self.palette().text()))
        p.end()
        QWidget.paintEvent(self, ev)
        p = QPainter(self)
        p.setClipRect(br)
        f = p.font()
        f.setBold(True)
        f.setPointSize(20)
        p.setFont(f)
        p.setPen(Qt.SolidLine)
        r = QRect(0, self.dummy.geometry().top() + 10, self.geometry().width(), 150)
        p.drawText(r, Qt.AlignHCenter | Qt.AlignTop | Qt.TextSingleLine, self.text)
        p.end()

    def set_msg(self, text):
        self.text = text

    def __call__(self, name, user_text, callback, function, *args, **kwargs):
        ' Run a job that blocks the GUI providing some feedback to the user '
        self.set_msg(user_text)
        job = LongJob(name, user_text, Dispatcher(partial(self.job_done, callback)), function, *args, **kwargs)
        job.start()
        self.start()

class JobsButton(QFrame):  # {{{

    tray_tooltip_updated = pyqtSignal(object)

    def __init__(self, horizontal=False, size=48, parent=None):
        QFrame.__init__(self, parent)
        if horizontal:
            size = 24
        self.pi = ProgressIndicator(self, size)
        self._jobs = QLabel('<b>'+_('Jobs:')+' 0')
        self._jobs.mouseReleaseEvent = self.mouseReleaseEvent
        self.shortcut = 'Shift+Alt+J'

        if horizontal:
            self.setLayout(QHBoxLayout())
            self.layout().setDirection(self.layout().RightToLeft)
        else:
            self.setLayout(QVBoxLayout())
            self._jobs.setAlignment(Qt.AlignHCenter|Qt.AlignBottom)

        self.layout().addWidget(self.pi)
        self.layout().addWidget(self._jobs)
        if not horizontal:
            self.layout().setAlignment(self._jobs, Qt.AlignHCenter)
        self._jobs.setMargin(0)
        self.layout().setContentsMargins(0, 0, 0, 0)
        self._jobs.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum)
        self.setCursor(Qt.PointingHandCursor)
        b = _('Click to see list of jobs')
        self.setToolTip(b + u' (%s)'%self.shortcut)
        self.action_toggle = QAction(b, parent)
        parent.addAction(self.action_toggle)
        self.action_toggle.triggered.connect(self.toggle)
        if hasattr(parent, 'keyboard'):
            parent.keyboard.register_shortcut('toggle jobs list', _('Show/hide the Jobs List'), default_keys=(self.shortcut,), action=self.action_toggle)

    def initialize(self, jobs_dialog, job_manager):
        self.jobs_dialog = jobs_dialog
        job_manager.job_added.connect(self.job_added)
        job_manager.job_done.connect(self.job_done)
        self.jobs_dialog.addAction(self.action_toggle)

    def mouseReleaseEvent(self, event):
        self.toggle()

    def toggle(self, *args):
        if self.jobs_dialog.isVisible():
            self.jobs_dialog.hide()
        else:
            self.jobs_dialog.show()

    @property
    def is_running(self):
        return self.pi.isAnimated()

    def start(self):
        self.pi.startAnimation()

    def stop(self):
        self.pi.stopAnimation()

    def jobs(self):
        src = unicode(self._jobs.text())
        return int(re.search(r'\d+', src).group())

    def tray_tooltip(self, num=0):
        if num == 0:
            text = _('No running jobs')
        elif num == 1:
            text = _('One running job')
        else:
            text = _('%d running jobs') % num
        if not (islinux or isbsd):
            text = 'calibre: ' + text
        return text

    def job_added(self, nnum):
        jobs = self._jobs
        src = unicode(jobs.text())
        num = self.jobs()
        text = src.replace(str(num), str(nnum))
        jobs.setText(text)
        self.start()
        self.tray_tooltip_updated.emit(self.tray_tooltip(nnum))

    def job_done(self, nnum):
        jobs = self._jobs
        src = unicode(jobs.text())
        num = self.jobs()
        text = src.replace(str(num), str(nnum))
        jobs.setText(text)
        if nnum == 0:
            self.no_more_jobs()
        self.tray_tooltip_updated.emit(self.tray_tooltip(nnum))

    def no_more_jobs(self):
        if self.is_running:
            self.stop()
            QCoreApplication.instance().alert(self, 5000)

class JobsButton(QWidget):  # {{{

    tray_tooltip_updated = pyqtSignal(object)

    def __init__(self, parent=None):
        QWidget.__init__(self, parent)
        self.mouse_over = False
        self.pi = ProgressIndicator(self, self.style().pixelMetric(QStyle.PM_ToolBarIconSize))
        self._jobs = QLabel('<b>'+_('Jobs:')+' 0 ')
        self._jobs.mouseReleaseEvent = self.mouseReleaseEvent
        self.shortcut = 'Alt+Shift+J'

        self.l = l = QHBoxLayout(self)
        l.setSpacing(3)
        l.addWidget(self.pi)
        l.addWidget(self._jobs)
        m = self.style().pixelMetric(QStyle.PM_DefaultFrameWidth)
        self.layout().setContentsMargins(m, m, m, m)
        self._jobs.setSizePolicy(QSizePolicy.Minimum, QSizePolicy.Minimum)
        self.setCursor(Qt.PointingHandCursor)
        b = _('Click to see list of jobs')
        self.setToolTip(b + u' [%s]'%self.shortcut)
        self.action_toggle = QAction(b, parent)
        parent.addAction(self.action_toggle)
        self.action_toggle.triggered.connect(self.toggle)
        if hasattr(parent, 'keyboard'):
            parent.keyboard.register_shortcut('toggle jobs list', _('Show/hide the Jobs List'), default_keys=(self.shortcut,), action=self.action_toggle)

    def event(self, ev):
        m = None
        et = ev.type()
        if et == ev.Enter:
            m = True
        elif et == ev.Leave:
            m = False
        if m is not None and m != self.mouse_over:
            self.mouse_over = m
            self.update()
        return QWidget.event(self, ev)

    def initialize(self, jobs_dialog, job_manager):
        self.jobs_dialog = jobs_dialog
        job_manager.job_added.connect(self.job_added)
        job_manager.job_done.connect(self.job_done)
        self.jobs_dialog.addAction(self.action_toggle)

    def mouseReleaseEvent(self, event):
        self.toggle()

    def toggle(self, *args):
        if self.jobs_dialog.isVisible():
            self.jobs_dialog.hide()
        else:
            self.jobs_dialog.show()

    @property
    def is_running(self):
        return self.pi.isAnimated()

    def start(self):
        self.pi.startAnimation()

    def stop(self):
        self.pi.stopAnimation()

    def jobs(self):
        src = unicode(self._jobs.text())
        return int(re.search(r'\d+', src).group())

    def tray_tooltip(self, num=0):
        if num == 0:
            text = _('No running jobs')
        elif num == 1:
            text = _('One running job')
        else:
            text = _('%d running jobs') % num
        if not (islinux or isbsd):
            text = 'calibre: ' + text
        return text

    def job_added(self, nnum):
        jobs = self._jobs
        src = unicode(jobs.text())
        num = self.jobs()
        text = src.replace(str(num), str(nnum))
        jobs.setText(text)
        self.start()
        self.tray_tooltip_updated.emit(self.tray_tooltip(nnum))

    def job_done(self, nnum):
        jobs = self._jobs
        src = unicode(jobs.text())
        num = self.jobs()
        text = src.replace(str(num), str(nnum))
        jobs.setText(text)
        if nnum == 0:
            self.no_more_jobs()
        self.tray_tooltip_updated.emit(self.tray_tooltip(nnum))

    def no_more_jobs(self):
#.........这里部分代码省略.........

class MyBlockingBusy(QDialog):  # {{{

    all_done = pyqtSignal()

    def __init__(self, args, ids, db, refresh_books, cc_widgets, s_r_func, do_sr, sr_calls, parent=None, window_title=_('Working')):
        QDialog.__init__(self, parent)

        self._layout =  l = QVBoxLayout()
        self.setLayout(l)

        self.msg = QLabel(_('Processing %d books, please wait...') % len(ids))
        self.font = QFont()
        self.font.setPointSize(self.font.pointSize() + 8)
        self.msg.setFont(self.font)
        self.pi = ProgressIndicator(self)
        self.pi.setDisplaySize(100)
        self._layout.addWidget(self.pi, 0, Qt.AlignHCenter)
        self._layout.addSpacing(15)
        self._layout.addWidget(self.msg, 0, Qt.AlignHCenter)
        self.setWindowTitle(window_title + '...')
        self.setMinimumWidth(200)
        self.resize(self.sizeHint())
        self.error = None
        self.all_done.connect(self.on_all_done, type=Qt.QueuedConnection)
        self.args, self.ids = args, ids
        self.db, self.cc_widgets = db, cc_widgets
        self.s_r_func = FunctionDispatcher(s_r_func)
        self.do_sr = do_sr
        self.sr_calls = sr_calls
        self.refresh_books = refresh_books

    def accept(self):
        pass

    def reject(self):
        pass

    def on_all_done(self):
        if not self.error:
            # The cc widgets can only be accessed in the GUI thread
            try:
                for w in self.cc_widgets:
                    w.commit(self.ids)
            except Exception as err:
                import traceback
                self.error = (err, traceback.format_exc())
        self.pi.stopAnimation()
        QDialog.accept(self)

    def exec_(self):
        self.thread = Thread(target=self.do_it)
        self.thread.start()
        self.pi.startAnimation()
        return QDialog.exec_(self)

    def do_it(self):
        try:
            self.do_all()
        except Exception as err:
            import traceback
            try:
                err = unicode(err)
            except:
                err = repr(err)
            self.error = (err, traceback.format_exc())

        self.all_done.emit()

    def do_all(self):
        cache = self.db.new_api
        args = self.args

        # Title and authors
        if args.do_swap_ta:
            title_map = cache.all_field_for('title', self.ids)
            authors_map = cache.all_field_for('authors', self.ids)
            def new_title(authors):
                ans = authors_to_string(authors)
                return titlecase(ans) if args.do_title_case else ans
            new_title_map = {bid:new_title(authors) for bid, authors in authors_map.iteritems()}
            new_authors_map = {bid:string_to_authors(title) for bid, title in title_map.iteritems()}
            cache.set_field('authors', new_authors_map)
            cache.set_field('title', new_title_map)

        if args.do_title_case and not args.do_swap_ta:
            title_map = cache.all_field_for('title', self.ids)
            cache.set_field('title', {bid:titlecase(title) for bid, title in title_map.iteritems()})

        if args.do_title_sort:
            lang_map = cache.all_field_for('languages', self.ids)
            title_map = cache.all_field_for('title', self.ids)
            def get_sort(book_id):
                if args.languages:
                    lang = args.languages[0]
                else:
                    try:
                        lang = lang_map[book_id][0]
                    except (KeyError, IndexError, TypeError, AttributeError):
                        lang = 'eng'
                return title_sort(title_map[book_id], lang=lang)
#.........这里部分代码省略.........

class MyBlockingBusy(QDialog):

    NORMAL = 0
    REQUESTED = 1
    ACKNOWLEDGED = 2

    def __init__(self, gui, msg, size=100, window_title="Marvin XD", show_cancel=False, on_top=False):
        flags = Qt.FramelessWindowHint
        if on_top:
            flags = Qt.FramelessWindowHint | Qt.WindowStaysOnTopHint
        QDialog.__init__(self, gui, flags)

        self._layout = QVBoxLayout()
        self.setLayout(self._layout)
        self.cancel_status = 0
        self.is_running = False

        # Add the spinner
        self.pi = ProgressIndicator(self)
        self.pi.setDisplaySize(size)
        self._layout.addSpacing(15)
        self._layout.addWidget(self.pi, 0, Qt.AlignHCenter)
        self._layout.addSpacing(15)

        # Fiddle with the message
        self.msg = QLabel(msg)
        # self.msg.setWordWrap(True)
        self.font = QFont()
        self.font.setPointSize(self.font.pointSize() + 2)
        self.msg.setFont(self.font)
        self._layout.addWidget(self.msg, 0, Qt.AlignHCenter)
        sp = QSizePolicy()
        sp.setHorizontalStretch(True)
        sp.setVerticalStretch(False)
        sp.setHeightForWidth(False)
        self.msg.setSizePolicy(sp)
        self.msg.setMinimumHeight(self.font.pointSize() + 8)

        self._layout.addSpacing(15)

        if show_cancel:
            self.bb = QDialogButtonBox()
            self.cancel_button = QPushButton(QIcon(I("window-close.png")), "Cancel")
            self.bb.addButton(self.cancel_button, self.bb.RejectRole)
            self.bb.clicked.connect(self.button_handler)
            self._layout.addWidget(self.bb)

        self.setWindowTitle(window_title)
        self.resize(self.sizeHint())

    def accept(self):
        self.stop()
        return QDialog.accept(self)

    def button_handler(self, button):
        """
        Only change cancel_status from NORMAL to REQUESTED
        """
        if self.bb.buttonRole(button) == QDialogButtonBox.RejectRole:
            if self.cancel_status == self.NORMAL:
                self.cancel_status = self.REQUESTED
                self.cancel_button.setEnabled(False)

    def reject(self):
        """
        Cannot cancel this dialog manually
        """
        pass

    def set_text(self, text):
        self.msg.setText(text)

    def start(self):
        self.is_running = True
        self.pi.startAnimation()

    def stop(self):
        self.is_running = False
        self.pi.stopAnimation()