Organize project files

Put QML components into folders, remove unused ones, split __init__.py
with engine.py.

harmonyqml/engine.py

@@ -0,0 +1,59 @@
+# Copyright 2019 miruka
+# This file is part of harmonyqml, licensed under GPLv3.
+
+import logging
+import sys
+from pathlib import Path
+from typing import Optional
+
+from PyQt5.QtCore import QFileSystemWatcher, QObject, QTimer
+from PyQt5.QtGui import QGuiApplication
+from PyQt5.QtQml import QQmlApplicationEngine
+
+from .__about__ import __doc__
+from .backend import DummyBackend
+
+# logging.basicConfig(level=logging.INFO)
+
+
+class Engine(QQmlApplicationEngine):
+    def __init__(self, app: QGuiApplication, parent: Optional[QObject] = None
+                ) -> None:
+        super().__init__(parent)
+        self.app     = app
+        self.backend = DummyBackend()
+        self.app_dir = Path(sys.argv[0]).resolve().parent
+
+        # Set QML properties
+        self.rootContext().setContextProperty("Engine", self)
+        self.rootContext().setContextProperty("Backend", self.backend)
+
+        # Connect Qt signals
+        self.quit.connect(self.app.quit)
+
+        # Make SIGINT (ctrl-c) work
+        self._sigint_timer = QTimer()
+        self._sigint_timer.timeout.connect(lambda: None)
+        self._sigint_timer.start(100)
+
+        # Setup UI live-reloading when a file is edited
+        self.file_watcher = QFileSystemWatcher()
+        self.file_watcher.directoryChanged.connect(lambda _: self.reload_qml())
+        self.file_watcher.addPath(str(self.app_dir / "components"))
+
+        # Load QML page and show window
+        self.load(str(self.app_dir / "components" / "Window.qml"))
+
+
+    def show_window(self) -> None:
+        self.rootObjects()[0].show()
+        sys.exit(self.app.exec())
+
+
+    def reload_qml(self) -> None:
+        self.clearComponentCache()
+        loader = self.rootObjects()[0].findChild(QObject, "UILoader")
+        source = loader.property("source")
+        loader.setProperty("source", None)
+        loader.setProperty("source", source)
+        logging.info("Reloaded: %s", source)