64 lines
2.0 KiB
Python
64 lines
2.0 KiB
Python
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# Copyright 2019 miruka
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# This file is part of harmonyqml, licensed under GPLv3.
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import logging
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import os
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import sys
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from typing import Optional
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from PyQt5.QtCore import (
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QFileSystemWatcher, QMetaObject, QObject, QTimer, pyqtSlot
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)
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from PyQt5.QtGui import QGuiApplication
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from PyQt5.QtQml import QQmlApplicationEngine, qmlRegisterType
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from .__about__ import __doc__
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from .backend import DummyBackend
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# logging.basicConfig(level=logging.INFO)
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class Engine(QQmlApplicationEngine):
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def __init__(self, app: QGuiApplication, parent: Optional[QObject] = None
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) -> None:
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super().__init__(parent)
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self.app = app
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self.backend = DummyBackend()
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self.program_dir = os.path.dirname(os.path.realpath(sys.argv[0]))
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# Set QML properties
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self.rootContext().setContextProperty("Engine", self)
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self.rootContext().setContextProperty("Backend", self.backend)
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# Connect Qt signals
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self.quit.connect(self.app.quit)
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# Make SIGINT (ctrl-c) work
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self._sigint_timer = QTimer()
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self._sigint_timer.timeout.connect(lambda: None)
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self._sigint_timer.start(100)
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# Setup UI live-reloading when a file is edited
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self.file_watcher = QFileSystemWatcher()
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self.file_watcher.directoryChanged.connect(lambda _: self.reload_qml())
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self.file_watcher.addPath(self.program_dir)
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# Load QML page and show window
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self.load(os.path.join(self.program_dir, "Window.qml"))
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self.rootObjects()[0].show()
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sys.exit(self.app.exec())
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def reload_qml(self) -> None:
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self.clearComponentCache()
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loader = self.rootObjects()[0].findChild(QObject, "UILoader")
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source = loader.property("source")
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loader.setProperty("source", None)
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loader.setProperty("source", source)
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logging.info("Reloaded: %s", source)
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def run() -> None:
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app = QGuiApplication(sys.argv)
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_ = Engine(app) # need to keep a reference
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