GUI for finger v1

examples/gui/app.py

@@ -0,0 +1,34 @@
+"""Qt application bootstrap for Orisys example dashboards."""
+
+from __future__ import annotations
+
+import os
+import sys
+
+
+def fix_qt_plugin_path() -> None:
+    """OpenCV redirects Qt to cv2/qt/plugins; use PyQt5's plugins instead."""
+    try:
+        from PyQt5.QtCore import QLibraryInfo
+
+        os.environ["QT_QPA_PLATFORM_PLUGIN_PATH"] = QLibraryInfo.location(
+            QLibraryInfo.PluginsPath
+        )
+    except Exception:
+        path = os.environ.get("QT_QPA_PLATFORM_PLUGIN_PATH", "")
+        if "cv2" in path.replace("\\", "/"):
+            os.environ.pop("QT_QPA_PLATFORM_PLUGIN_PATH", None)
+
+
+def get_or_create_qapp(app_name: str = "Orisys Finger Dashboard"):
+    fix_qt_plugin_path()
+    from PyQt5.QtCore import Qt
+    from PyQt5.QtWidgets import QApplication
+
+    QApplication.setAttribute(Qt.AA_EnableHighDpiScaling, True)
+    QApplication.setAttribute(Qt.AA_UseHighDpiPixmaps, True)
+    app = QApplication.instance()
+    if app is None:
+        app = QApplication(sys.argv)
+    app.setApplicationName(app_name)
+    return app