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

.. only:: html

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

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

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

.. _sphx_glr_gallery_qt_app_asyncio.py:


Qt app with asyncio
-------------------

An example demonstrating a qt app with a wgpu viz inside.

This is the same as the ``qt_app.py`` example, except this uses
the asyncio compatible mode that was introduced in Pyside 6.6.

For more info see:

* https://doc.qt.io/qtforpython-6/PySide6/QtAsyncio/index.html
* https://www.qt.io/blog/introducing-qtasyncio-in-technical-preview

.. GENERATED FROM PYTHON SOURCE LINES 16-90

.. code-block:: Python


    # ruff: noqa: N802

    import time
    import asyncio

    from PySide6 import QtWidgets, QtAsyncio
    from rendercanvas.qt import QRenderWidget
    from rendercanvas.utils.cube import setup_drawing_sync


    def async_connect(signal, async_function):
        # Unfortunately, the signal.connect() methods don't detect
        # coroutine functions, so we have to wrap it in a function that creates
        # a Future for the coroutine (which will then run in the current event-loop).
        #
        # The docs on QtAsyncio do something like
        #
        #     self.button.clicked.connect(
        #         lambda: asyncio.ensure_future(self.whenButtonClicked()
        #     )
        #
        # But that's ugly, so we create a little convenience function
        def proxy():
            return asyncio.ensure_future(async_function())

        signal.connect(proxy)


    class ExampleWidget(QtWidgets.QWidget):
        def __init__(self):
            super().__init__()
            self.resize(640, 480)
            self.setWindowTitle("Rendering in Qt with asyncio")

            splitter = QtWidgets.QSplitter()

            self.button = QtWidgets.QPushButton("Hello world", self)
            self.canvas = QRenderWidget(splitter, update_mode="continuous")
            self.output = QtWidgets.QTextEdit(splitter)

            # self.button.clicked.connect(self.whenButtonClicked)  # see above :(
            async_connect(self.button.clicked, self.whenButtonClicked)

            splitter.addWidget(self.canvas)
            splitter.addWidget(self.output)
            splitter.setSizes([400, 300])

            layout = QtWidgets.QHBoxLayout()
            layout.addWidget(self.button, 0)
            layout.addWidget(splitter, 1)
            self.setLayout(layout)

            self.show()

        def addLine(self, line):
            t = self.output.toPlainText()
            t += "\n" + line
            self.output.setPlainText(t)

        async def whenButtonClicked(self):
            self.addLine("Waiting 1 sec ...")
            await asyncio.sleep(1)
            self.addLine(f"Clicked at {time.time():0.1f}")


    app = QtWidgets.QApplication([])
    example = ExampleWidget()

    draw_frame = setup_drawing_sync(example.canvas)
    example.canvas.request_draw(draw_frame)

    # Enter Qt event-loop the asyncio-compatible way
    QtAsyncio.run()


.. _sphx_glr_download_gallery_qt_app_asyncio.py:

.. only:: html

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

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

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

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

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

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

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


.. only:: html

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

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