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

.. only:: html

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

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

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

.. _sphx_glr__gallery_guis_image_widget_imgui.py:


ImGUI with ImageWidget
======================

Example showing how to write a custom GUI with imgui and use it with ImageWidget

.. GENERATED FROM PYTHON SOURCE LINES 7-82



.. image-sg:: /_gallery/guis/images/sphx_glr_image_widget_imgui_001.webp
   :alt: image widget imgui
   :srcset: /_gallery/guis/images/sphx_glr_image_widget_imgui_001.webp
   :class: sphx-glr-single-img


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

 .. code-block:: none

    /home/runner/work/fastplotlib/fastplotlib/fastplotlib/graphics/_features/_base.py:18: UserWarning: casting float64 array to float32
      warn(f"casting {array.dtype} array to float32")







|

.. code-block:: Python


    # test_example = true

    # some simple image processing functions
    from scipy.ndimage import gaussian_filter
    import imageio.v3 as iio

    import fastplotlib as fpl

    # subclass from EdgeWindow to make a custom ImGUI Window to place inside the figure!
    from fastplotlib.ui import EdgeWindow
    from imgui_bundle import imgui

    a = iio.imread("imageio:camera.png")
    iw = fpl.ImageWidget(data=a, cmap="viridis", figure_kwargs={"size": (700, 560)})
    iw.show()


    # GUI for some basic image processing
    class ImageProcessingWindow(EdgeWindow):
        def __init__(self, figure, size, location, title):
            super().__init__(figure=figure, size=size, location=location, title=title)

            self.sigma = 0.0
            self.order_x, self.order_y = 0, 0

        def update(self):
            # implement the GUI within the update function
            # you do not need to call imgui.new_frame(), this is handled by Figure

            # window creation is handled by the base EdgeWindow.draw_window()
            # if you want to customize the imgui window, you can override EdgeWindow.draw_window()

            something_changed = False

            # slider for gaussian filter sigma value
            changed, value = imgui.slider_float(label="sigma", v=self.sigma, v_min=0.0, v_max=20.0)
            if changed:
                self.sigma = value
                something_changed = True

            # int entries for gaussian filter order
            for axis in ["x", "y"]:
                changed, value = imgui.input_int(f"order {axis}", v=getattr(self, f"order_{axis}"))
                if changed:
                    if value < 0:
                        value = 0
                    setattr(self, f"order_{axis}", value)
                    something_changed = True

            if something_changed:
                self.process_image()

            # imgui.end() is handled by EdgeWindow.draw_window()

            # do not call imgui.end_frame(), this is handled by Figure

        def process_image(self):
            processed = gaussian_filter(a, sigma=self.sigma, order=(self.order_y, self.order_x))
            iw.set_data(processed)


    gui = ImageProcessingWindow(iw.figure, size=200, location="right", title="Gaussian Filter")


    iw.figure.add_gui(gui)

    figure = iw.figure


    # 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 0.753 seconds)


.. _sphx_glr_download__gallery_guis_image_widget_imgui.py:

.. only:: html

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

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

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

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

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

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

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


.. only:: html

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

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