1 files changed, 79 insertions, 0 deletions
diff --git a/examples/opengl/threadedqopenglwidget/glwidget.py b/examples/opengl/threadedqopenglwidget/glwidget.py
new file mode 100644
index 000000000..edb88e77c
--- /dev/null
+++ b/examples/opengl/threadedqopenglwidget/glwidget.py
@@ -0,0 +1,79 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+
+from PySide6.QtOpenGLWidgets import QOpenGLWidget
+from PySide6.QtCore import QMutexLocker, QSize, QThread, Slot, Signal
+
+from renderer import Renderer
+
+
+class GLWidget(QOpenGLWidget):
+
+    render_requested = Signal()
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+
+        self.aboutToCompose.connect(self.on_about_to_compose)
+        self.frameSwapped.connect(self.on_frame_swapped)
+        self.aboutToResize.connect(self.on_about_to_resize)
+        self.resized.connect(self.on_resized)
+
+        self._thread = QThread()
+        self._renderer = Renderer(self)
+        self._renderer.moveToThread(self._thread)
+        self._thread.finished.connect(self._renderer.deleteLater)
+
+        self.render_requested.connect(self._renderer.render)
+        self._renderer.context_wanted.connect(self.grab_context)
+
+        self._thread.start()
+
+    def stop_rendering(self):
+        self._renderer.prepare_exit()
+        self._thread.quit()
+        self._thread.wait()
+        self._thread = None
+        self._renderer = None
+
+    def closeEvent(self, event):
+        self.stop_rendering()
+        event.accept()
+
+    def paintEvent(self, event):
+        pass
+
+    def sizeHint(self):
+        return QSize(200, 200)
+
+    @Slot()
+    def on_about_to_compose(self):
+        # We are on the gui thread here. Composition is about to
+        # begin. Wait until the render thread finishes.
+        self._renderer.lock_renderer()
+
+    @Slot()
+    def on_frame_swapped(self):
+        self._renderer.unlock_renderer()
+        # Assuming a blocking swap, our animation is driven purely by the
+        # vsync in self example.
+        self.render_requested.emit()
+
+    @Slot()
+    def on_about_to_resize(self):
+        self._renderer.lock_renderer()
+
+    @Slot()
+    def on_resized(self):
+        self._renderer.unlock_renderer()
+
+    @Slot()
+    def grab_context(self):
+        if not self._renderer:
+            return
+        self._renderer.lock_renderer()
+        with QMutexLocker(self._renderer.grab_mutex()):
+            self.context().moveToThread(self._thread)
+            self._renderer.grab_condition().wakeAll()
+            self._renderer.unlock_renderer()