.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "11_demos\itom\embeddedMatplotlib\demo_matplotlibGuiFastAutoUpdate.py"
.. LINE NUMBERS ARE GIVEN BELOW.

.. only:: html

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

        :ref:`Go to the end <sphx_glr_download_11_demos_itom_embeddedMatplotlib_demo_matplotlibGuiFastAutoUpdate.py>`
        to download the full example code.

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

.. _sphx_glr_11_demos_itom_embeddedMatplotlib_demo_matplotlibGuiFastAutoUpdate.py:

Matplotlib fast auto update
==============================

.. GENERATED FROM PYTHON SOURCE LINES 5-112

.. code-block:: Python


    import matplotlib
    import matplotlib.pyplot as plt
    from itomUi import ItomUi
    from itom import ui

    matplotlib.use("module://mpl_itom.backend_itomagg")


    class MatplotGuiAutoUpdate(ItomUi):
        def __init__(self):
            ItomUi.__init__(
                self,
                "matplotlibGuiAutoUpdate.ui",
                ui.TYPEWINDOW,
                childOfMainWindow=True,
                deleteOnClose=True,
            )
            # the deleteOnClose = True argument will not only hide the figure if the close-button is pressed,
            # but also destroy it. Then, the destroyed signal is emitted, caught by the slot self.on_mainWindow_destroyed.
            # This can be used, to delete certain things.

            self.gui.btnStop["enabled"] = False
            self.timerID = None
            self.counter = 1
            self.fignum = (
                max(
                    [
                        0,
                    ]
                    + plt.get_fignums()
                )
                + 1
            )  # guarantee to get a new matplotlib figure number
            self.axisImage = None

            if not "__version__" in ItomUi.__dict__ or ItomUi.__version__ < "2.1":
                # in earlier versions of itom, an auto-connection to methods of the gui itself was not possible.
                # From ItomUi.__version__ >= 2.1 on, the dialog or window itself can be auto-connected by its
                # object name.
                self.gui.connect("destroyed()", self.on_mainWindow_destroyed)

        @ItomUi.autoslot("")
        def on_btnStart_clicked(self):
            if self.timerID is None:
                # start the timer that calls the method 'timeout' every 2 seconds
                self.timerID = timer(500, self.timeout)
                self.timeout()
            self.gui.btnStart["enabled"] = False
            self.gui.btnStop["enabled"] = True

        @ItomUi.autoslot("")
        def on_btnStop_clicked(self):
            if not self.timerID is None:
                # stop and delete the timer, if started
                self.timerID.stop()
                self.timerID = None
            self.gui.btnStart["enabled"] = True
            self.gui.btnStop["enabled"] = False

        # for itom <= 2.1, this auto-slot will raise a runtime error, however it is manually connected in the constructor of this class.
        @ItomUi.autoslot("")
        def on_mainWindow_destroyed(self):
            """The windows was closed and destroyed. Stop the timer and tell matplotlib to close the figure"""
            if not self.timerID is None:
                self.timerID.stop()
                self.timerID = None
            plt.close(self.fignum)

        def timeout(self):
            print("update plot")

            canvas = self.gui.matplotlibPlot  # Reference to matplotlibPlot widget
            fig = plt.figure(num=self.fignum, canvas=canvas)
            if self.axisImage is None:
                # first time call, a new AxesImage object is created
                ax = fig.add_subplot(111)
                self.axisImage = ax.imshow(
                    dataObject.randN([100, 100], "uint8"), cmap=plt.cm.gray
                )
                ax.set_title("title of plot [%i]" % self.counter)
                self.counter += 1
                # Move left and bottom spines outward by 10 points
                ax.spines["left"].set_position(("outward", 10))
                ax.spines["bottom"].set_position(("outward", 10))
                # Hide the right and top spines
                ax.spines["right"].set_visible(False)
                ax.spines["top"].set_visible(False)
                # Only show ticks on the left and bottom spines
                ax.yaxis.set_ticks_position("left")
                ax.xaxis.set_ticks_position("bottom")
                plt.show()
            else:
                # subsequent calls: the existing AxesImage object is updated, this is much faster than replotting a new object
                self.axisImage.set_data(dataObject.randN([200, 200], "uint8"))
                self.axisImage.set_extent([0, 200, 0, 200])  # update the new size
                fig.canvas.draw()

        def show(self):
            self.gui.show()


    if __name__ == "__main__":
        gui = MatplotGuiAutoUpdate()
        gui.show()









.. GENERATED FROM PYTHON SOURCE LINES 114-116

.. image:: ../../_static/demoMatplotlibFastAutoUpdate_1.png
   :width: 75%


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

   **Total running time of the script:** (0 minutes 0.052 seconds)


.. _sphx_glr_download_11_demos_itom_embeddedMatplotlib_demo_matplotlibGuiFastAutoUpdate.py:

.. only:: html

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

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

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

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

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

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

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