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

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_examples_bar.py>`
        to download the full example code.

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

.. _sphx_glr_examples_bar.py:


Display a bar's height and name on top of it upon hovering
==========================================================

Using an event handler to change the annotation text and position.

.. GENERATED FROM PYTHON SOURCE LINES 7-29



.. image-sg:: /examples/images/sphx_glr_bar_001.png
   :alt: Hover over a bar
   :srcset: /examples/images/sphx_glr_bar_001.png
   :class: sphx-glr-single-img





.. code-block:: Python


    import string
    import matplotlib.pyplot as plt
    import mplcursors

    fig, ax = plt.subplots()
    ax.bar(range(9), range(1, 10), align="center")
    labels = string.ascii_uppercase[:9]
    ax.set(xticks=range(9), xticklabels=labels, title="Hover over a bar")

    # With HoverMode.Transient, the annotation is removed as soon as the mouse
    # leaves the artist.  Alternatively, one can use HoverMode.Persistent (or True)
    # which keeps the annotation until another artist gets selected.
    cursor = mplcursors.cursor(hover=mplcursors.HoverMode.Transient)
    @cursor.connect("add")
    def on_add(sel):
        x, y, width, height = sel.artist[sel.index].get_bbox().bounds
        sel.annotation.set(text=f"{x+width/2}: {height}",
                           position=(0, 20), anncoords="offset points")
        sel.annotation.xy = (x + width / 2, y + height)

    plt.show()


.. _sphx_glr_download_examples_bar.py:

.. only:: html

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

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

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

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

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

    .. container:: sphx-glr-download sphx-glr-download-zip

      :download:`Download zipped: bar.zip <bar.zip>`


.. only:: html

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

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_
