WIP qapp POC

bec_widgets/examples/qapp_custom/bec_qapp.py

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+from qtpy.QtWidgets import QApplication
+
+
+class BECQApplication(QApplication):
+    def setup_bec_features(self):
+        self.bec_props = {}
+        self.is_bec_app = True
+        print("[BECQApplication]: Features initialized.")
+
+    def inject_property(self, name, value):
+        self.bec_props[name] = value
+        print(f"[BECQApplication]: Injected property '{name}' = {value}")
+
+
+def upgrade_to_becqapp():
+    app = QApplication.instance()
+    if app is None:
+        raise RuntimeError("No QApplication instance found!")
+
+    if getattr(app, "is_bec_app", False):
+        print("[BECQApplication]: Already upgraded.")
+        return app
+
+    # Only inject your explicitly defined Python methods
+    methods_to_inject = ["setup_bec_features", "inject_property"]
+
+    for method_name in methods_to_inject:
+        method = getattr(BECQApplication, method_name)
+        setattr(app, method_name, method.__get__(app, QApplication))
+
+    app.setup_bec_features()
+    print("[BECQApplication]: QApplication upgraded to BECQApplication.")
+    return app

bec_widgets/examples/qapp_custom/bec_widget.py

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+from qtpy.QtWidgets import QWidget, QLabel, QVBoxLayout, QApplication
+from bec_qapp import upgrade_to_becqapp
+
+
+class BECWidget(QWidget):
+    def __init__(self, parent=None):
+        super().__init__(parent)
+
+        # Upgrade qApp if necessary
+        app = QApplication.instance()
+        if not getattr(app, "is_bec_app", False):
+            print("[BECWidget]: Upgrading QApplication instance to BECQApplication.")
+            app = upgrade_to_becqapp()
+        else:
+            print("[BECWidget]: BECQApplication already active.")
+
+        app.inject_property("widget_initialized", True)
+
+        self.setup_ui()
+
+    def setup_ui(self):
+        layout = QVBoxLayout()
+        label = QLabel("BECWidget is running with BECQApplication features.")
+        layout.addWidget(label)
+        self.setLayout(layout)

bec_widgets/examples/qapp_custom/launch.py

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+import sys
+import os
+
+from PySide6.QtWidgets import QMainWindow, QWidget, QVBoxLayout
+
+# Set this early!
+# os.environ["PYSIDE_DISABLE_INTERNAL_QT_WARNINGS"] = "1"
+
+from qtpy.QtWidgets import QApplication
+from bec_widget import BECWidget
+
+
+class DemoApp(QMainWindow):
+    def __init__(self):
+        super().__init__()
+        self.setWindowTitle("Demo Application")
+        self.setGeometry(100, 100, 600, 400)
+
+        # Create an instance of BECWidget
+        self.main_widget = QWidget(self)
+
+        self.setCentralWidget(self.main_widget)
+        self.main_widget.layout = QVBoxLayout(self.main_widget)
+        self.bec_widget_1 = BECWidget()
+        self.bec_widget_2 = BECWidget()
+
+        # Set up the UI for the BECWidget
+        self.bec_widget_1.setup_ui()
+        self.bec_widget_2.setup_ui()
+
+        self.main_widget.layout.addWidget(self.bec_widget_1)
+        self.main_widget.layout.addWidget(self.bec_widget_2)
+
+
+def main():
+    app = QApplication(sys.argv)
+    widget = DemoApp()
+    widget.resize(400, 200)
+    widget.show()
+    sys.exit(app.exec())
+
+
+if __name__ == "__main__":
+    main()