def change_font(self):
     """Change console font"""
     font, valid = QFontDialog.getFont(get_font(self.CONF_SECTION), self,
                                   _("Select a new font"))
     if valid:
         self.set_plain_text_font(font)
         set_font(font, self.CONF_SECTION)

 def data(self, index, role=Qt.DisplayRole):
     """Cell content"""
     if not index.isValid():
         return to_qvariant()
     value = self.get_value(index)
     if is_binary_string(value):
         try:
             value = to_text_string(value, 'utf8')
         except:
             pass
     if role == Qt.DisplayRole:
         if value is np.ma.masked:
             return ''
         else:
             return to_qvariant(self._format % value)
     elif role == Qt.TextAlignmentRole:
         return to_qvariant(int(Qt.AlignCenter|Qt.AlignVCenter))
     elif role == Qt.BackgroundColorRole and self.bgcolor_enabled \
       and value is not np.ma.masked:
         hue = self.hue0+\
               self.dhue*(self.vmax-self.color_func(value)) \
               /(self.vmax-self.vmin)
         hue = float(np.abs(hue))
         color = QColor.fromHsvF(hue, self.sat, self.val, self.alp)
         return to_qvariant(color)
     elif role == Qt.FontRole:
         return to_qvariant(get_font('arrayeditor'))
     return to_qvariant()

    def __init__(self, parent, statusbar):
        QWidget.__init__(self, parent)

        self.label_font = font = get_font('editor')
        font.setPointSize(self.font().pointSize())
        font.setBold(True)
        
        layout = QHBoxLayout()
        layout.setContentsMargins(0, 0, 0, 0)
        self.setLayout(layout)

        statusbar.addPermanentWidget(self)

    def __init__(self, text, title='', font=None, parent=None,
                 readonly=False, size=(400, 300)):
        QDialog.__init__(self, parent)
        
        # Destroying the C++ object right after closing the dialog box,
        # otherwise it may be garbage-collected in another QThread
        # (e.g. the editor's analysis thread in Spyder), thus leading to
        # a segmentation fault on UNIX or an application crash on Windows
        self.setAttribute(Qt.WA_DeleteOnClose)
        
        self.text = None
        
        # Display text as unicode if it comes as bytes, so users see 
        # its right representation
        if is_binary_string(text):
            self.is_binary = True
            text = to_text_string(text, 'utf8')
        else:
            self.is_binary = False
        
        self.layout = QVBoxLayout()
        self.setLayout(self.layout)

        # Text edit
        self.edit = QTextEdit(parent)
        self.edit.textChanged.connect(self.text_changed)
        self.edit.setReadOnly(readonly)
        self.edit.setPlainText(text)
        if font is None:
            font = get_font()
        self.edit.setFont(font)
        self.layout.addWidget(self.edit)

        # Buttons configuration
        buttons = QDialogButtonBox.Ok
        if not readonly:
            buttons = buttons | QDialogButtonBox.Cancel
        bbox = QDialogButtonBox(buttons)
        bbox.accepted.connect(self.accept)
        bbox.rejected.connect(self.reject)
        self.layout.addWidget(bbox)
        
        # Make the dialog act as a window
        self.setWindowFlags(Qt.Window)
        
        self.setWindowIcon(ima.icon('edit'))
        self.setWindowTitle(_("Text editor") + \
                            "%s" % (" - "+str(title) if str(title) else ""))
        self.resize(size[0], size[1])

 def createEditor(self, parent, option, index):
     """Create editor widget"""
     model = index.model()
     value = model.get_value(index)
     if model._data.dtype.name == "bool":
         value = not value
         model.setData(index, to_qvariant(value))
         return
     elif value is not np.ma.masked:
         editor = QLineEdit(parent)
         editor.setFont(get_font('arrayeditor'))
         editor.setAlignment(Qt.AlignCenter)
         if is_number(self.dtype):
             editor.setValidator(QDoubleValidator(editor))
         editor.returnPressed.connect(self.commitAndCloseEditor)
         return editor

    def get_plugin_font(self, rich_text=False):
        """
        Return plugin font option.

        All plugins in Spyder use a global font. This is a convenience method
        in case some plugins will have a delta size based on the default size.
        """

        if rich_text:
            option = 'rich_font'
            font_size_delta = self.RICH_FONT_SIZE_DELTA
        else:
            option = 'font'
            font_size_delta = self.FONT_SIZE_DELTA

        return get_font(option=option, font_size_delta=font_size_delta)

    def __init__(self, parent, history_filename, profile=False):
        """
        parent : specifies the parent widget
        """
        ConsoleBaseWidget.__init__(self, parent)
        SaveHistoryMixin.__init__(self)
                
        # Prompt position: tuple (line, index)
        self.current_prompt_pos = None
        self.new_input_line = True
        
        # History
        self.histidx = None
        self.hist_wholeline = False
        assert is_text_string(history_filename)
        self.history_filename = history_filename
        self.history = self.load_history()
        
        # Session
        self.historylog_filename = CONF.get('main', 'historylog_filename',
                                            get_conf_path('history.log'))
        
        # Context menu
        self.menu = None
        self.setup_context_menu()

        # Simple profiling test
        self.profile = profile
        
        # Buffer to increase performance of write/flush operations
        self.__buffer = []
        self.__timestamp = 0.0
        self.__flushtimer = QTimer(self)
        self.__flushtimer.setSingleShot(True)
        self.__flushtimer.timeout.connect(self.flush)

        # Give focus to widget
        self.setFocus()
        
        # Completion
        completion_size = CONF.get('shell_appearance', 'completion/size')
        completion_font = get_font('console')
        self.completion_widget.setup_appearance(completion_size,
                                                completion_font)
        # Cursor width
        self.setCursorWidth( CONF.get('shell_appearance', 'cursor/width') )

 def data(self, index, role=Qt.DisplayRole):
     """Cell content"""
     if not index.isValid():
         return to_qvariant()
     if role == Qt.DisplayRole or role == Qt.EditRole:
         column = index.column()
         row = index.row()
         if column == 0:
             return to_qvariant(to_text_string(self.df_index[row]))
         else:
             value = self.get_value(row, column-1)
             if isinstance(value, float):
                 return to_qvariant(self._format % value)
             else:
                 try:
                     return to_qvariant(to_text_string(value))
                 except UnicodeDecodeError:
                     return to_qvariant(encoding.to_unicode(value))
     elif role == Qt.BackgroundColorRole:
         return to_qvariant(self.get_bgcolor(index))
     elif role == Qt.FontRole:
         return to_qvariant(get_font('arrayeditor'))
     return to_qvariant()

def test():
    from spyderlib.utils.qthelpers import qapplication
    app = qapplication()

    from spyderlib.plugins.variableexplorer import VariableExplorer
    settings = VariableExplorer.get_settings()

    shell = ExternalPythonShell(pythonexecutable=sys.executable,
                                interact=True,
                                stand_alone=settings,
                                wdir=osp.dirname(__file__),
                                mpl_backend=0,
                                light_background=False)

    from spyderlib.config.gui import get_font
    
    font = get_font()
    shell.shell.set_font(font)

    shell.shell.toggle_wrap_mode(True)
    shell.start_shell(False)
    shell.show()
    sys.exit(app.exec_())

 def set_infowidget_font(self):
     """Set font for infowidget"""
     font = get_font('inspector', 'rich_text')
     self.infowidget.set_font(font)

 def set_infowidget_font(self):
     """Set font for infowidget"""
     font = get_font(option='rich_font')
     self.infowidget.set_font(font)

 def get_plugin_font(self, option=None):
     """Return plugin font option"""
     return get_font(self.CONF_SECTION, option)