MouseReleaseEvent gets called twice

[Thomas Stein]

Hey,

So I have this minimal example reproducing my problem:

from PyQt5 import QtWidgets as qtw

class Scene(qtw.QGraphicsScene):
    def mousePressEvent(self, event: qtw.QGraphicsSceneMouseEvent) -> None:
        print("pressed")
    def mouseReleaseEvent(self, event: qtw.QGraphicsSceneMouseEvent) -> None:
        print("released")

class MainWindow(qtw.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        scene = Scene()
        view = qtw.QGraphicsView(scene)
        centralWidget = qtw.QWidget()
        centralLayout = qtw.QHBoxLayout(centralWidget)
        centralWidget.setLayout(centralLayout)
        centralLayout.addWidget(view)
        self.setCentralWidget(centralWidget)
        self.show()

if __name__ == '__main__':
    import sys
    app = qtw.QApplication(sys.argv)
    mainWindow = MainWindow()
    sys.exit(app.exec())

When I run the programm, and doubletap the left mouse button fast, I get the output

pressed
released
released

Which is not what I expect it to do. It should rather print pressed, released, pressed, released.
Any idea? Im kinda stuck on this one

[SGaist]

Hi,

You should add:

• the PyQt5 version you are using
• the Qt version
• the OS
• the hardware for your double tap

[Thomas Stein]

@SGaist
Hi,

• 5.14.0
• That should be 5.14.0 aswell
• Windows 10 Education
• Steelseries rival 100

A quick fix I found was to call the mousePressEvent in the mouseDoubleClickEvent method, but Im not sure if thats supposed to be like that

[Pl45m4]

@Thomas-Stein said in MouseReleaseEvent gets called twice:

Steelseries rival 100

So it's actually just a "normal" doubleClick instead of tap?
"Tap" suggests, that you are using a touchscreen, which isn't the case :)

Do you face the same behavior, when you use a standard mouse?

[Thomas Stein]

@Pl45m4

Hey,

Yes sorry, my bad. I shouldve used click instead of tap, you are right. And yes, I do face the same behaviour

[Pl45m4]

@Thomas-Stein said in MouseReleaseEvent gets called twice:

And yes, I do face the same behaviour

My idea was, that your (gaming) mouse has some software or special double click behavior which causes your weird debug output...

[Thomas Stein]

@Pl45m4
Well I tried double tapping my laptops touchpad, and it still get the same output