.. DO NOT EDIT.
.. THIS FILE WAS AUTOMATICALLY GENERATED BY SPHINX-GALLERY.
.. TO MAKE CHANGES, EDIT THE SOURCE PYTHON FILE:
.. "gallery/qt_app.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.py>`
        to download the full example code.

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

.. _sphx_glr_gallery_qt_app.py:


Qt app
------

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

Note how the ``rendercanvas.qt.loop`` object is not even imported;
you can simply run ``app.exec()`` the Qt way.

.. GENERATED FROM PYTHON SOURCE LINES 10-74

.. code-block:: Python


    # ruff: noqa: N802, E402

    import time
    import importlib


    # Normally you'd just write e.g.
    # from PySide6 import QtWidgets

    # For the sake of making this example Just Work, we try multiple QT libs
    for lib in ("PySide6", "PyQt6", "PySide2", "PyQt5"):
        try:
            QtWidgets = importlib.import_module(".QtWidgets", lib)
            break
        except ModuleNotFoundError:
            pass

    from rendercanvas.qt import QRenderWidget
    from rendercanvas.utils.cube import setup_drawing_sync


    class ExampleWidget(QtWidgets.QWidget):
        def __init__(self):
            super().__init__()
            self.resize(640, 480)
            self.setWindowTitle("Rendering to a canvas embedded in a qt app")

            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)

            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)

        def whenButtonClicked(self):
            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 (compatible with qt5/qt6)
    app.exec() if hasattr(app, "exec") else app.exec_()


.. _sphx_glr_download_gallery_qt_app.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.ipynb <qt_app.ipynb>`

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

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

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

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


.. only:: html

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

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