Python QtWidgets.QMessageBox类代码示例

 def copy_to_clipboard(self):
     img = self.get_selection()
     if img.isNull():
         QMessageBox.critical(self, self.tr('Error'), self.tr('No image was selected!'))
         return
     QApplication.clipboard().setPixmap(img)
     self.reject()

    def save_image_as(self):
        img = self.get_selection().toImage()
        if img.isNull():
            QMessageBox.critical(self, self.tr('Error'), self.tr('No image was selected!'))
            return

        self.hide()

        formats = {
            self.tr('Portable Network Graphics (*.png)'): 'png',
            self.tr('Joint Photographic Experts Group (*.jpg *.jpeg)'): 'jpg',
            self.tr('Graphics Interchange Format (*.gif)'): 'gif',
            self.tr('Bitmap (*.bmp)'): 'bmp',
            self.tr('All Images (*.png *.jpg *.gif *.bmp)'): 'all'
        }

        file_format = None
        destination = QFileDialog.getSaveFileName(self, 'Save image', '', ';;'.join(formats.keys()))
        if isinstance(destination, tuple):
            destination, file_format = destination
            file_format = formats[file_format]
            if file_format == 'all':
                file_format = None

        if not file_format:
            file_format = destination.rsplit('.', 1)[-1]

        if destination:
            if file_format not in formats.values():
                file_format = 'png'
            if not destination.endswith('.' + file_format):
                destination += '.' + file_format
            img.save(destination, file_format, 0 if file_format == 'png' else 90)
        self.reject()

def track_user_stats():

    reply = get_usage_track_conf()

    if reply=='ask later':

        m = QMessageBox(
            QMessageBox.Question,
            "User tracking",
            "Do you give us permission to track which country you are from and how many times you use this application? " \
            "This will contribute to the support of this software.",
            QMessageBox.Yes | QMessageBox.No | QMessageBox.NoRole
        )
        ask_later_btn = m.addButton("Ask me later", QMessageBox.NoRole)
        m.setEscapeButton(ask_later_btn)
        reply = m.exec_()

        if reply == QMessageBox.No:
            set_usage_track_conf('no-track')

        elif reply == QMessageBox.Yes:
            set_usage_track_conf('track')
            reply = 'track'

        elif reply == QMessageBox.NoButton:
            set_usage_track_conf('ask later')

    if reply=='track':
        register_access()

def save_plot(data, file_formats, filename=""):
    _LAST_DIR_KEY = "directories/last_graph_directory"
    _LAST_FILTER_KEY = "directories/last_graph_filter"
    settings = QSettings()
    start_dir = settings.value(_LAST_DIR_KEY, filename)
    if not start_dir or \
            (not os.path.exists(start_dir) and
             not os.path.exists(os.path.split(start_dir)[0])):
        start_dir = os.path.expanduser("~")
    last_filter = settings.value(_LAST_FILTER_KEY, "")
    filename, writer, filter = \
        filedialogs.open_filename_dialog_save(start_dir, last_filter, file_formats)
    if not filename:
        return
    try:
        writer.write(filename, data)
    except OSError as e:
        mb = QMessageBox(
            None,
            windowTitle="Error",
            text='Error occurred while saving file "{}": {}'.format(filename, e),
            detailedText=traceback.format_exc(),
            icon=QMessageBox.Critical)
        mb.exec_()
    else:
        settings.setValue(_LAST_DIR_KEY, os.path.split(filename)[0])
        settings.setValue(_LAST_FILTER_KEY, filter)

    def onDictyExpressLink(self, link):
        if not self.data:
            return

        selectedIndexes = self.treeWidget.selectedIndexes()
        if not len(selectedIndexes):
            QMessageBox.information(
                self, "No gene ids selected",
                "Please select some genes and try again."
            )
            return
        model = self.treeWidget.model()
        mapToSource = model.mapToSource
        selectedRows = self.treeWidget.selectedIndexes()
        selectedRows = [mapToSource(index).row() for index in selectedRows]
        model = model.sourceModel()

        selectedGeneids = [self.row2geneinfo[row] for row in selectedRows]
        selectedIds = [self.geneinfo[i][0] for i in selectedGeneids]
        selectedIds = set(selectedIds)

        def fix(ddb):
            if ddb.startswith("DDB"):
                if not ddb.startswith("DDB_G"):
                    ddb = ddb.replace("DDB", "DDB_G")
                return ddb
            return None

        genes = [fix(gene) for gene in selectedIds if fix(gene)]
        url = str(link) % " ".join(genes)
        QDesktopServices.openUrl(QUrl(url))

 def share_clipboard(self):
     mime = QApplication.clipboard().mimeData()
     try:
         wnd = ShareDialog(self, mime=mime)
     except ValueError as e:
         QMessageBox.critical(self, self.tr('Error'), str(e))
         return
     else:
         wnd.show()
         wnd.exec_()

    def save_project(self, project_path=None):
        try:
            if project_path is None:
                project_path = QFileDialog.getExistingDirectory(self, "Select the project directory")

            if project_path is not None and str(project_path)!='':
                project_path = str(project_path)
                self.save({}, project_path)
        except Exception as e:
            QMessageBox.critical(self, "Error", str(e))

def show_survey():
    # If run for the first time, open a browser tab with a survey
    settings = QSettings()
    show_survey = settings.value("startup/show-survey", True, type=bool)
    if show_survey:
        question = QMessageBox(
            QMessageBox.Question,
            'Orange Survey',
            'We would like to know more about how our software is used.\n\n'
            'Would you care to fill our short 1-minute survey?',
            QMessageBox.Yes | QMessageBox.No)
        question.setDefaultButton(QMessageBox.Yes)
        later = question.addButton('Ask again later', QMessageBox.NoRole)
        question.setEscapeButton(later)

        def handle_response(result):
            if result == QMessageBox.Yes:
                success = QDesktopServices.openUrl(
                    QUrl("https://orange.biolab.si/survey/short.html"))
                settings.setValue("startup/show-survey", not success)
            else:
                settings.setValue("startup/show-survey", result != QMessageBox.No)

        question.finished.connect(handle_response)
        question.show()
        return question

def message(icon, text, title=None, informative_text=None, details=None,
            buttons=None, default_button=None, exc_info=False, parent=None):
    """Show a message helper function.
    """
    if title is None:
        title = "Message"
    if not text:
        text = "I am neither a postman nor a doctor."

    if buttons is None:
        buttons = QMessageBox.Ok

    if details is None and exc_info:
        details = traceback.format_exc(limit=20)

    mbox = QMessageBox(icon, title, text, buttons, parent)

    if informative_text:
        mbox.setInformativeText(informative_text)

    if details:
        mbox.setDetailedText(details)

    if default_button is not None:
        mbox.setDefaultButton(default_button)

    return mbox.exec_()

        def get_save_filename(self):  # pragma: no cover
            if sys.platform == "darwin":
                def remove_star(filt):
                    return filt.replace(" (*.", " (.")
            else:
                def remove_star(filt):
                    return filt

            no_ext_filters = {remove_star(f): f for f in self._valid_filters()}
            filename = self._initial_start_dir()
            while True:
                dlg = QFileDialog(
                    None, "Save File", filename, ";;".join(no_ext_filters))
                dlg.setAcceptMode(dlg.AcceptSave)
                dlg.selectNameFilter(remove_star(self._default_valid_filter()))
                dlg.setOption(QFileDialog.DontConfirmOverwrite)
                if dlg.exec() == QFileDialog.Rejected:
                    return "", ""
                filename = dlg.selectedFiles()[0]
                selected_filter = no_ext_filters[dlg.selectedNameFilter()]
                filename = self._replace_extension(
                    filename, self._extension_from_filter(selected_filter))
                if not os.path.exists(filename) or QMessageBox.question(
                        self, "Overwrite file?",
                        f"File {os.path.split(filename)[1]} already exists.\n"
                        "Overwrite?") == QMessageBox.Yes:
                    return filename, selected_filter

    def browse_file(self, in_demos=False):
        if in_demos:
            start_file = get_sample_datasets_dir()
            if not os.path.exists(start_file):
                QMessageBox.information(
                    None, "File",
                    "Cannot find the directory with documentation data sets")
                return
        else:
            start_file = self.last_path() or os.path.expanduser("~/")

        filename, _ = QFileDialog.getOpenFileName(
            self, 'Open Distance File', start_file, "(*.dst)")
        if not filename:
            return
        self.add_path(filename)
        self.open_file()

    def browse_file(self, in_demos=False):
        if in_demos:
            start_file = get_sample_datasets_dir()
            if not os.path.exists(start_file):
                QMessageBox.information(
                    None, "File",
                    "Cannot find the directory with documentation data sets")
                return
        else:
            start_file = self.last_path() or os.path.expanduser("~/")

        filename, _ = QFileDialog.getOpenFileName(
            self, 'Open Orange Data File', start_file, dialog_formats())
        if not filename:
            return
        self.add_path(filename)
        self.source = self.LOCAL_FILE
        self.load_data()

 def register_hotkeys(self):
     if self._hotkey is not None:
         self.rebuild_menu()
         self._hotkey.unregister(winid=self.winId())
         hotkey_bindings = {
             settings['hotkey/clipboard']: (self.share_clipboard, self._action_clip),
             settings['hotkey/screenshot']: (self.capture_screen, self._action_screen)
         }
         for hotkey, (callback, action) in hotkey_bindings.items():
             if hotkey:
                 if self._hotkey.register(hotkey, callback, self.winId()):
                     sequence = QKeySequence(hotkey) if hotkey else QKeySequence()
                     action.setShortcut(sequence)
                 else:
                     QMessageBox.critical(self, 'Error', 'Could not bind {} hotkey!\n'
                                                         'Key combination {} is probably already in use.'
                                          .format(const.APP_NAME, hotkey))
     else:
         qDebug('Hotkeys are not supported on this platform')

        def message_restart(parent):
            icon = QMessageBox.Information
            buttons = QMessageBox.Ok | QMessageBox.Cancel
            title = 'Information'
            text = 'Orange needs to be restarted for the changes to take effect.'

            msg_box = QMessageBox(icon, title, text, buttons, parent)
            msg_box.setDefaultButton(QMessageBox.Ok)
            msg_box.setInformativeText('Press OK to close Orange now.')

            msg_box.button(QMessageBox.Cancel).setText('Close later')
            return msg_box.exec_()

def save_plot(data, file_formats, filename=""):
    _LAST_DIR_KEY = "directories/last_graph_directory"
    _LAST_FILTER_KEY = "directories/last_graph_filter"
    settings = QSettings()
    start_dir = settings.value(_LAST_DIR_KEY, filename)
    if not start_dir or \
            (not os.path.exists(start_dir) and
             not os.path.exists(os.path.split(start_dir)[0])):
        start_dir = os.path.expanduser("~")
    last_filter = settings.value(_LAST_FILTER_KEY, "")
    filename, writer, filter = \
        filedialogs.get_file_name(start_dir, last_filter, file_formats)
    if not filename:
        return
    try:
        writer.write(filename, data)
    except Exception as e:
        QMessageBox.critical(
            None, "Error", 'Error occurred while saving file "{}": {}'.format(filename, e))
    else:
        settings.setValue(_LAST_DIR_KEY, os.path.split(filename)[0])
        settings.setValue(_LAST_FILTER_KEY, filter)