Additional windows not opening on correct monitor

fvez_demtroys

Hi JonB,

Here is my additional window.

class HelperWindow(QMainWindow):
    def __init__(self, mainWindow):
        super().__init__()
        self.mainWindow = mainWindow
        self.setMinimumSize(900, 700)
        self.setWindowTitle('Helper')
        self.initialPosition()

    def initialPosition(self):
        geometry = self.frameGeometry()
        centerPoint = QApplication.desktop().availableGeometry(self.mainPage.mainWindow).center()
        centerPoint.setY(self.mainPage.tabWidget.y())
        geometry.moveCenter(centerPoint)
        self.move(geometry.topRight())
        self.setScreen(self.mainPage.mainWindow.screen())

I get :
AttributeError: 'HelperWindow' object has no attribute 'setScreen'

Any idea if I have an error in my code?
It should inherit all methods from QMainWindow...

FVez

jsulm

@JonB I think setScreen is not present in Qt5 but in in Qt6

fvez_demtroys

Is there no simple way to align both windows?
I want the top of the second window to be aligned with the top of the main window. Nothing more.

Thanks!
FVez

fvez_demtroys

When I try to simply self.move(self.mainWindow.pos())
I get the following error.
qt.qpa.window: Window position QRect(0,-22 900x700) outside any known screen, using primary screen

Not sure why self.mainWindow.pos() returns a position outside the screen, I've been using only one monitor today to simplify the issue.

JonB

@jsulm said in Additional windows not opening on correct monitor:

@JonB I think setScreen is not present in Qt5 but in in Qt6

All I know is @fvez_demtroys wrote

QWidget does have a setScreen function.

However this function is not present for QMainWindow.

I don't know whether Qt 5 or 6, I just don't see how QWidget can have a method which QMainWindow does not.

fvez_demtroys

Hi JonB,

As I mentioned in my original post, I am using PyQt5 5.15.4.
PyQt5 documentation does not mention a setScreen function for the QWidget class.
https://doc.qt.io/qt-5/qwidget.html

FVez

JonB

@fvez_demtroys
Earlier you wrote

QWidget does have a setScreen function.

but now you agree it does not. I was confused. Anyway @jsulm has explained it's only Qt6.

fvez_demtroys

Hi JonB,

Yes my error, I was looking at the PyQt6 Doc!
Sorry for the confusion.

I'm still having no luck in achieving what I want though.

Is there no way to tell the new window to open at the same Y position as the main window and be centered on the main window?
Could this issue be caused by the OSX environment?

I don't understand why I can't use mainWindow.pos().y() and mainWindow.geometry().center().x() to properly display my new window where I want it to be...

Thanks,
FVez

fvez_demtroys

For those interested, I got it to work.

The main issue was that I was trying to set the position in the __init__ method of my widget.
I changed my approach and decided to override the show() method of the widget.

I think the initial position of my mainWindow wasn't correct when the __init__ method was called and thus my widget couldn't center properly.
Here is the code for anyone interested in my solution.

    def show(self):
        geo = self.frameGeometry()
        geo.moveCenter(self.mainWindow.geometry().center())
        geo.moveTop(self.mainWindow.geometry().top())
        self.move(geo.topLeft())
        super().show()

Had to take a break to figure out what I was doing wrong.
Thanks for the help!

FVez

SGaist

Indeed !

Until shown, the widget has no "physical presence" hence doing geometry manipulation will not generate the expected result.