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

.. only:: html

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

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

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

.. _sphx_glr__gallery_misc_simple_event.py:


Simple Event
============

Example showing how to add a simple callback event.

.. GENERATED FROM PYTHON SOURCE LINES 7-54



.. image-sg:: /_gallery/misc/images/sphx_glr_simple_event_001.webp
   :alt: simple event
   :srcset: /_gallery/misc/images/sphx_glr_simple_event_001.webp
   :class: sphx-glr-single-img


.. rst-class:: sphx-glr-script-out

 .. code-block:: none

    {'value': 'viridis'}







|

.. code-block:: Python


    # test_example = false

    import fastplotlib as fpl
    import imageio.v3 as iio

    data = iio.imread("imageio:camera.png")

    # Create a figure
    figure = fpl.Figure(size=(700, 560))

    # plot sine wave, use a single color
    image_graphic = figure[0,0].add_image(data=data)

    # show the plot
    figure.show()


    # define callback function to print the event data
    def callback_func(event_data):
        print(event_data.info)


    # Will print event data when the color changes
    image_graphic.add_event_handler(callback_func, "cmap")

    image_graphic.cmap = "viridis"


    # adding a click event, we can also use decorators to add event handlers
    @image_graphic.add_event_handler("click")
    def click_event(event_data):
        # get the click location in screen coordinates
        xy = (event_data.x, event_data.y)

        # map the screen coordinates to world coordinates
        xy = figure[0,0].map_screen_to_world(xy)[:-1]

        # print the click location
        print(xy)


    # NOTE: `if __name__ == "__main__"` is NOT how to use fastplotlib interactively
    # please see our docs for using fastplotlib interactively in ipython and jupyter
    if __name__ == "__main__":
        print(__doc__)
        fpl.run()


.. rst-class:: sphx-glr-timing

   **Total running time of the script:** (0 minutes 0.730 seconds)


.. _sphx_glr_download__gallery_misc_simple_event.py:

.. only:: html

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

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

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

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

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

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

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


.. only:: html

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

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