How can I add a minimize / maximize buttons in GUI made with Qt Designer?

Question

I've create a GUI in "Qt Designer". Now I'd like to open a simple window with a minimize/maximize buttons in the top right corner.

from PyQt5 import uic
window = uic.loadUi("Video_Player.ui") # Video_Player.ui is the name of my GUI main file.
window.show()

should be something like this:

window.setWindowFlag(Qt.WindowMinimizeButtonHint , True)

But I don't know how to set/define my Qt to make it work...?

Answer 1

I think you should firstly hide the Windows bar in this way:

self.setWindowFlag(Qt.FramelessWindowHint)

And then add your own Minimize, Maximize and Close botton on QtDesigner. Finally for example you can make them work as follows in your code:

self.maxBtn = self.findChild(QPushButton,'Maximize_btn')
self.maxBtn.clicked.connect(lambda: self.showMaximized())

self.minBtn = self.findChild(QPushButton,'Minimize_btn')
self.minBtn.clicked.connect(lambda: self.showMinimized())

self.closeBtn = self.findChild(QPushButton,'Close_btn')
self.closeBtn.clicked.connect(lambda: self.close())

Answer 2

self.setWindowFlags(_qt.FramelessWindowHint)
This hides standard window's titlebar

Before

After