You can use a QProcess to send the commands, and in those commands pass the window id to it:
import sys
from functools import cached_property
from PyQt5 import QtCore, QtWidgets
class GnuPlotManager(QtCore.QObject):
@cached_property
def process(self):
qprocess = QtCore.QProcess()
qprocess.setProgram("gnuplot")
return qprocess
def start(self):
self.process.start()
def send_command(self, command):
self.process.write((command + "\n").encode())
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super().__init__(parent)
central_widget = QtWidgets.QWidget()
self.setCentralWidget(central_widget)
button = QtWidgets.QPushButton("Send Command")
lay = QtWidgets.QVBoxLayout(central_widget)
lay.addWidget(self.command_le)
lay.addWidget(button)
lay.addWidget(self.container)
button.clicked.connect(self.handle_clicked)
self.gnuplot_manager.start()
self.gnuplot_manager.send_command("set terminal qt")
wid = int(self.container.winId())
self.gnuplot_manager.send_command(f"set term x11 window '{wid:x}'")
self.gnuplot_manager.send_command("clear")
self.command_le.setText("pl sin(x)")
self.resize(640, 480)
@cached_property
def container(self):
return QtWidgets.QWidget()
@cached_property
def command_le(self):
return QtWidgets.QLineEdit()
@cached_property
def gnuplot_manager(self):
return GnuPlotManager()
def handle_clicked(self):
self.gnuplot_manager.send_command(self.command_le.text())
self.updateGeometry()
def main(args):
app = QtWidgets.QApplication(args)
w = MainWindow()
w.show()
ret = app.exec_()
sys.exit(ret)
if __name__ == "__main__":
main(sys.argv)
