How make my pyqt5 frameless application which maximizes to Max according to different resolutions

Question

I already have a custom frameless window application in Pyqt5. I just want the application to be once opened, get to full size depending upon the different resolutions of different PC's.

I want only _ and X buttons and not a [] (maximize) button, because I want it to maximize automatically. Is there any way to do that??

Answer 1

The best approach to achieve that is to use a combination of showMaximized() and the disabled WindowMaximizeButtonHint window flag :

class MyWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()
        self.setWindowFlags(
            self.windowFlags() & ~QtCore.Qt.WindowMaximizeButtonHint)

# ...
myWindow = MyWindow()
myWindow.showMaximized()

The only problem with this is that (at least on Windows) as soon as you disable the maximize button, the window becomes movable.

Answer 2

I just found that solution. We can do that by :

from PySide import QtGui
app = QtGui.QApplication([])
screen_resolution = app.desktop().screenGeometry()
width, height = screen_resolution.width(), screen_resolution.height()