how to make a window in the middle of the screen?

aria_aa

Hi everyone.
I want to make my window in the middle of the screen with half of the screen size, but it acts a little weird for me.
I don't know where is problem.
The code:

#include <QApplication>
#include <QtWidgets>

int main(int argc, char *argv[]){
    int screen_width = 1920, screen_height = 1080;
    int window_width = screen_width/2, window_height = screen_height/2;
    int wtp = (screen_width-window_width)/2; //width of top-left point of the window
    int htp = (screen_height-window_height)/2; //height of top-left point of the window
    int wbp = window_width; //width of bottom-right point of the window
    int hbp = window_height; //height of bottom-right point of the window
    QApplication app (argc, argv);
    QWidget window;
    window.setWindowTitle("Main Window");
    window.setGeometry(wtp, htp, wbp, hbp);
    window.show();
    return app.exec();
}

The location and size of the window :

Christian Ehrlicher

And are you sure your resolution is 1920x1080? Use QScreen to get your correct resolution.

aria_aa

@Christian-Ehrlicher said in how to make a window in the middle of the screen?:

And are you sure your resolution is 1920x1080? Use QScreen to get your correct resolution.

Yes, I'm totally sure about the screen resolution.
and I checked it now with python it works correctly with Qt5 but with Qt6 there is the same problem.

the code:

import sys
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QApplication, QMainWindow
#from PyQt6 import QtWidgets
#from PyQt6.QtWidgets import QApplication, QMainWindow

class window(QMainWindow):
    def __init__(self):
        super(window, self).__init__()
        self.screen_width = 1920
        self.screen_height = 1080
        self.window_width = self.screen_width / 2
        self.window_height = self.screen_height / 2
        self.wtp = (self.screen_width-self.window_width)/2; #width of top-left point of the window
        self.htp = (self.screen_height-self.window_height)/2; #height of top-left point of the window
        self.wbp = self.window_width; #width of bottom-right point of the window
        self.hbp = self.window_height; #height of bottom-right point of the window
        self.setGeometry(self.wtp, self.htp, self.wbp, self.hbp)
        
def My_app():
    app = QApplication(sys.argv)
    win = window()
    win.show()
    sys.exit(app.exec())

if __name__ == '__main__':
    My_app()

import sys
#from PyQt5 import QtWidgets
#from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt6 import QtWidgets
from PyQt6.QtWidgets import QApplication, QMainWindow

class window(QMainWindow):
    def __init__(self):
        super(window, self).__init__()
        self.screen_width = 1920
        self.screen_height = 1080
        self.window_width = self.screen_width / 2
        self.window_height = self.screen_height / 2
        self.wtp = (self.screen_width-self.window_width)/2; #width of top-left point of the window
        self.htp = (self.screen_height-self.window_height)/2; #height of top-left point of the window
        self.wbp = self.window_width; #width of bottom-right point of the window
        self.hbp = self.window_height; #height of bottom-right point of the window
        self.setGeometry(self.wtp, self.htp, self.wbp, self.hbp)
        
def My_app():
    app = QApplication(sys.argv)
    win = window()
    win.show()
    sys.exit(app.exec())

if __name__ == '__main__':
    My_app()

Christian Ehrlicher

All I can say it works fine for me with Qt6.dev on Linux.