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# Source code for tecplot.plot.font

    from builtins import super

    from .. import constant, session
    from ..tecutil import sv

    class Font(session.Style):
        """Style of text objects such as titles and labels.

        This class controls the typeface and size of various text objects found
        in plots and axes:

        .. code-block:: python
            :emphasize-lines: 26-30

            from os import path
            import tecplot as tp
            from tecplot.constant import PlotType, Units, AxisTitleMode

            examples_dir = tp.session.tecplot_examples_directory()
            infile = path.join(examples_dir, 'OneraM6wing', 'OneraM6_SU2_RANS.plt')
            dataset = tp.data.load_tecplot(infile)

            frame = tp.active_frame()
            plot = frame.plot(PlotType.Cartesian2D)
            plot.activate()

            plot.show_contour = True

            xaxis = plot.axes.x_axis
            xaxis.title.title_mode = AxisTitleMode.UseText
            xaxis.title.text = 'Longitudinal (m)'
            xaxis.min, xaxis.max = 0, 1.2

            yaxis = plot.axes.y_axis
            yaxis.title.title_mode = AxisTitleMode.UseText
            yaxis.title.text = 'Transverse (m)'
            yaxis.min, yaxis.max = 0, 1.3

            for ax in [xaxis, yaxis]:
                ax.title.font.typeface = 'Times'
                ax.title.font.bold = False
                ax.title.font.italic = True
                ax.title.font.size_units = Units.Frame
                ax.title.font.size = 7

            tp.export.save_png('font.png', 600)

        ..  figure:: /_static/images/font.png
            :width: 300px
            :figwidth: 300px
        """
        def __init__(self, parent):
            self.parent = parent
            super().__init__(parent._sv, sv.TEXTSHAPE, **parent._style_attrs)

        @property
        def bold(self):
            """Use the bold version of the current typeface.

            :type: `boolean <bool>`

            Example::

                >>> axis.title.font.bold = True
            """
            return self._get_style(bool, sv.ISBOLD)

        @bold.setter
        def bold(self, value):
            self._set_style(bool(value), sv.ISBOLD)

        @property
        def italic(self):
            """Use the italic version of the current typeface.

            :type: `boolean <bool>`

            Example::

                >>> axis.title.font.italic = True
            """
            return self._get_style(bool, sv.ISITALIC)

        @italic.setter
        def italic(self, value):
            self._set_style(bool(value), sv.ISITALIC)

        @property
        def size(self):
            """Height of the font.

            :type: `float` in units of `Font.size_units`

            Example usage::

                >>> axis.title.font.size = 10
            """
            return self._get_style(float, sv.HEIGHT)

        @size.setter
        def size(self, value):
            self._set_style(float(value), sv.HEIGHT)

        @property
        def size_units(self):
            """Units used by the size attribute.

            :type: `Units <constant.Units>`

            Possible values: `Units.Point`, `Units.Frame` (percentage of frame
            height). This example sets the axis title to 10% of the frame height::

                >>> from tecplot.constant import Units
                >>> axis.title.font.size_units = Units.Frame
                >>> axis.title.font.size = 10
            """
            constant.Units.AxisPercentage
            return self._get_style(constant.Units, sv.SIZEUNITS)

        @size_units.setter
        def size_units(self, value):
            size = self.size
            self._set_style(constant.Units(value), sv.SIZEUNITS)
            self.size = size

        @property
        def typeface(self):
            """Specific font (or typeface) to use for text.

            :type: `string <str>`

            This can be any font installed on the current system. If the font is
            not found, Times or Helvetica will be used when rendering the text.
            Example usage::

                >>> axis.title.font.typeface = 'Times'
            """
            return self._get_style(str, sv.FONTFAMILY)

        @typeface.setter
        def typeface(self, value):
            self._set_style(str(value), sv.FONTFAMILY)

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