PyQt5 drawing lines that have mouse events

I have an application where I draw 2 custom widgets and then draw a line between them. I want to add a mousePressEvent to the line.

What would be the best way to do this?

I suppose I could create a QWidget of x pixel thickness and y length and then fill in the whole widget with the colour I want the line to have. Then the QWidget has the mousePressEvent that I can override. This doesn't seem like the most elegant solution and feels more like a workaround. Is there a better way?

import sys

from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPaintEvent, QPainter, QPen, QFont
from PyQt5.QtWidgets import QApplication, QMainWindow, QWidget, QLabel


class MyWidget(QWidget):
    def __init__(self, name, parent):
        super().__init__(parent)
        self.setAutoFillBackground(True)
        self.setFixedSize(300, 100)
        p = self.palette()
        p.setColor(self.backgroundRole(), Qt.white)
        self.setPalette(p)

        lbl_name = QLabel(name, self)
        lbl_name.setFont(QFont('Arial', 16))
        lbl_name.move((self.width() - lbl_name.width()) / 2, self.height()/2 - lbl_name.height()/2)


class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.main_widget = QWidget(self)

        self.widget_1 = MyWidget("Widget 1", self)
        self.widget_1.move(50, 50)
        self.widget_2 = MyWidget("Widget 2", self)
        self.widget_2.move(700, 600)

        self.resize(1200, 800)
        self.setCentralWidget(self.main_widget)

    def paintEvent(self, a0: QPaintEvent) -> None:
        super().paintEvent(a0)
        painter = QPainter(self)
        painter.setPen(QPen(Qt.red, 3, Qt.SolidLine))

        widget_1_x = self.widget_1.pos().x() + self.widget_1.size().width()
        widget_1_y = self.widget_1.pos().y() + self.widget_1.size().height() / 2
        widget_2_x = self.widget_2.pos().x()
        widget_2_y = self.widget_2.pos().y() + self.widget_2.size().height() / 2
        halfway_x = widget_1_x + (widget_2_x - widget_1_x) / 2

        # add mousePressEvents to these lines:
        painter.drawLine(widget_1_x, widget_1_y, halfway_x, widget_1_y)
        painter.drawLine(halfway_x, widget_1_y, halfway_x, widget_2_y)
        painter.drawLine(halfway_x, widget_2_y, widget_2_x, widget_2_y)


if __name__ == "__main__":
    app = QApplication(sys.argv)
    myapp = MainWindow()
    myapp.show()
    sys.exit(app.exec_())

How the above code looks like when run

source https://stackoverflow.com/questions/71959812/pyqt5-drawing-lines-that-have-mouse-events