
.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "gallery/text_labels_and_annotations/line_with_text.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        Click :ref:`here <sphx_glr_download_gallery_text_labels_and_annotations_line_with_text.py>`
        to download the full example code

.. rst-class:: sphx-glr-example-title

.. _sphx_glr_gallery_text_labels_and_annotations_line_with_text.py:


=======================
Artist within an artist
=======================

Override basic methods so an artist can contain another
artist.  In this case, the line contains a Text instance to label it.

.. GENERATED FROM PYTHON SOURCE LINES 9-66

.. code-block:: default

    import numpy as np
    import matplotlib.pyplot as plt
    import matplotlib.lines as lines
    import matplotlib.transforms as mtransforms
    import matplotlib.text as mtext


    class MyLine(lines.Line2D):
        def __init__(self, *args, **kwargs):
            # we'll update the position when the line data is set
            self.text = mtext.Text(0, 0, '')
            lines.Line2D.__init__(self, *args, **kwargs)

            # we can't access the label attr until *after* the line is
            # initiated
            self.text.set_text(self.get_label())

        def set_figure(self, figure):
            self.text.set_figure(figure)
            lines.Line2D.set_figure(self, figure)

        def set_axes(self, axes):
            self.text.set_axes(axes)
            lines.Line2D.set_axes(self, axes)

        def set_transform(self, transform):
            # 2 pixel offset
            texttrans = transform + mtransforms.Affine2D().translate(2, 2)
            self.text.set_transform(texttrans)
            lines.Line2D.set_transform(self, transform)

        def set_data(self, x, y):
            if len(x):
                self.text.set_position((x[-1], y[-1]))

            lines.Line2D.set_data(self, x, y)

        def draw(self, renderer):
            # draw my label at the end of the line with 2 pixel offset
            lines.Line2D.draw(self, renderer)
            self.text.draw(renderer)

    # Fixing random state for reproducibility
    np.random.seed(19680801)


    fig, ax = plt.subplots()
    x, y = np.random.rand(2, 20)
    line = MyLine(x, y, mfc='red', ms=12, label='line label')
    #line.text.set_text('line label')
    line.text.set_color('red')
    line.text.set_fontsize(16)

    ax.add_line(line)

    plt.show()




.. image:: /gallery/text_labels_and_annotations/images/sphx_glr_line_with_text_001.png
    :alt: line with text
    :class: sphx-glr-single-img





.. GENERATED FROM PYTHON SOURCE LINES 67-74

------------

References
""""""""""

The use of the following functions, methods, classes and modules is shown
in this example:

.. GENERATED FROM PYTHON SOURCE LINES 75-92

.. code-block:: default


    import matplotlib
    matplotlib.lines
    matplotlib.lines.Line2D
    matplotlib.lines.Line2D.set_data
    matplotlib.artist
    matplotlib.artist.Artist
    matplotlib.artist.Artist.draw
    matplotlib.artist.Artist.set_transform
    matplotlib.text
    matplotlib.text.Text
    matplotlib.text.Text.set_color
    matplotlib.text.Text.set_fontsize
    matplotlib.text.Text.set_position
    matplotlib.axes.Axes.add_line
    matplotlib.transforms
    matplotlib.transforms.Affine2D








.. _sphx_glr_download_gallery_text_labels_and_annotations_line_with_text.py:


.. only :: html

 .. container:: sphx-glr-footer
    :class: sphx-glr-footer-example



  .. container:: sphx-glr-download sphx-glr-download-python

     :download:`Download Python source code: line_with_text.py <line_with_text.py>`



  .. container:: sphx-glr-download sphx-glr-download-jupyter

     :download:`Download Jupyter notebook: line_with_text.ipynb <line_with_text.ipynb>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    Keywords: matplotlib code example, codex, python plot, pyplot
    `Gallery generated by Sphinx-Gallery
    <https://sphinx-gallery.readthedocs.io>`_
