回答編集履歴
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検証してみた。
test
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@@ -55,3 +55,157 @@
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(余談：こう見ると、シグナルのスレッド処理はGTK+よりQtの方が優秀だなぁ)
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---
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検証してみました。
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(linuxmint19.1/python3.6.7、PyQt5でなくPySide2です。)
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```python
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# coding: utf-8
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import sys, threading
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from PySide2.QtWidgets import *
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from PySide2.QtCore import *
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from PySide2.QtGui import *
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def debugOutput(s):
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sys.stdout.write(s + '\n')
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sys.stdout.flush()
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class Notifier(QObject):
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notify = Signal()
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class Thread(QThread):
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def __init__(self, notifier):
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super().__init__()
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self.notifier = notifier
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def run(self):
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debugOutput('start thread %#x.' % threading.get_ident())
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self.notifier.notify.emit()
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class MainWindow(QWidget):
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def __init__(self):
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super().__init__()
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layout = QVBoxLayout()
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self.setLayout(layout)
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button = QPushButton('Start')
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button.clicked.connect(self.onClicked)
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layout.addWidget(button)
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def onClicked(self):
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self.notifier = Notifier()
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self.thread = Thread(self.notifier)
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self.notifier.moveToThread(self.thread)
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#self.notifier.notify.connect(self.onNotify)
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self.notifier.notify.connect(self.onNotify, type=Qt.DirectConnection)
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self.thread.start()
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def onNotify(self):
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debugOutput('received notify signal %#x.' % threading.get_ident())
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if __name__ == '__main__':
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debugOutput('main thread %#x.' % threading.get_ident())
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app = QApplication(sys.argv)
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window = MainWindow()
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window.show()
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sys.exit(app.exec_())
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```
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Qt.DirectConnectionを指定しない場合。
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```
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main thread 0x7f2f8fd6f740.
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start thread 0x7f2f67f02700.
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received notify signal 0x7f2f8fd6f740.
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```
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Qt.DirectConnectionを指定した場合。
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```
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main thread 0x7ff207af9740.
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start thread 0x7ff1dfbea700.
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received notify signal 0x7ff1dfbea700.
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```
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