PyQt5 - How to put two QWidgets side by side in the screen?

[Patitotective]

I have two windows (QWidgets) and i want them to be resized and positioned side by side.
Like this:

[Patitotective]

This seems to be working:

...
screen_size = QGuiApplication.primaryScreen().size()

self.parent.move(0, 0)
self.parent.resize(screen_size.width() // 2, screen_size.height())

second_widget.move(screen_size.width() // 2, 0)
second_widget.resize(screen_size.width() // 2, screen_size.height())	

Where self is the main QWidget, self.parent the QMainWindow and the second_widget another QWidget.

---

For anyone who is interested, here is a minimal example:

import sys

from PyQt5.QtWidgets import QMainWindow, QWidget, QApplication, QPushButton, QVBoxLayout
from PyQt5.QtGui import QGuiApplication

class MainWindow(QMainWindow):
	def __init__(self, *args, **kwargs):
		super().__init__(*args, **kwargs)

		self.main_widget = MainWidget(self)
		self.setCentralWidget(self.main_widget)

		self.show()

class MainWidget(QWidget):
	def __init__(self, parent=None):
		super().__init__(parent=parent)

		self.parent = parent
		
		self.setWindowTitle("Main widget")
		self.setLayout(QVBoxLayout())
		
		side_by_side_button = QPushButton("Make windows side by side")
		side_by_side_button.clicked.connect(self.make_window_side_by_side)

		self.layout().addWidget(side_by_side_button)

		self.second_window = QWidget()
		self.second_window.setWindowTitle("Second window")
		self.second_window.setStyleSheet("background-color: #1F75A6;") # To difference between windows

		self.second_window.show()

	def make_window_side_by_side(self):
		screen_size = QGuiApplication.primaryScreen().size() # Get screen size

		self.parent.showNormal() # Unmaximize and unminimize
		self.parent.move(0, 0) # Move to the top left corner
		self.parent.resize(screen_size.width() // 2, screen_size.height()) # Set the width to the half of the screen width and the height to the screen height

		self.second_window.showNormal() # Unmaximize and unminimize
		self.second_window.move(screen_size.width() // 2, 0) # Move X to the middle of the screen and Y to the top
		self.second_window.resize(screen_size.width() // 2, screen_size.height()) # Set the width to the half of the screen width and the height to the screen height


if __name__ == "__main__":
	app = QApplication(sys.argv)

	main_window = MainWindow()

	sys.exit(app.exec_())

[eyllanesc]

@Patitotective Why don't you use a QHBoxLayout to place both QWidget inside a new window?

[Patitotective]

@eyllanesc I want the user to be able to manipulate the second window as he wants. I'm asking how to position two windows side by side.

[Patitotective]

This seems to be working:

...
screen_size = QGuiApplication.primaryScreen().size()

self.parent.move(0, 0)
self.parent.resize(screen_size.width() // 2, screen_size.height())

second_widget.move(screen_size.width() // 2, 0)
second_widget.resize(screen_size.width() // 2, screen_size.height())	

Where self is the main QWidget, self.parent the QMainWindow and the second_widget another QWidget.

---

For anyone who is interested, here is a minimal example:

import sys

from PyQt5.QtWidgets import QMainWindow, QWidget, QApplication, QPushButton, QVBoxLayout
from PyQt5.QtGui import QGuiApplication

class MainWindow(QMainWindow):
	def __init__(self, *args, **kwargs):
		super().__init__(*args, **kwargs)

		self.main_widget = MainWidget(self)
		self.setCentralWidget(self.main_widget)

		self.show()

class MainWidget(QWidget):
	def __init__(self, parent=None):
		super().__init__(parent=parent)

		self.parent = parent
		
		self.setWindowTitle("Main widget")
		self.setLayout(QVBoxLayout())
		
		side_by_side_button = QPushButton("Make windows side by side")
		side_by_side_button.clicked.connect(self.make_window_side_by_side)

		self.layout().addWidget(side_by_side_button)

		self.second_window = QWidget()
		self.second_window.setWindowTitle("Second window")
		self.second_window.setStyleSheet("background-color: #1F75A6;") # To difference between windows

		self.second_window.show()

	def make_window_side_by_side(self):
		screen_size = QGuiApplication.primaryScreen().size() # Get screen size

		self.parent.showNormal() # Unmaximize and unminimize
		self.parent.move(0, 0) # Move to the top left corner
		self.parent.resize(screen_size.width() // 2, screen_size.height()) # Set the width to the half of the screen width and the height to the screen height

		self.second_window.showNormal() # Unmaximize and unminimize
		self.second_window.move(screen_size.width() // 2, 0) # Move X to the middle of the screen and Y to the top
		self.second_window.resize(screen_size.width() // 2, screen_size.height()) # Set the width to the half of the screen width and the height to the screen height


if __name__ == "__main__":
	app = QApplication(sys.argv)

	main_window = MainWindow()

	sys.exit(app.exec_())

[eyllanesc]

@Patitotective I think I misunderstood what you want. On the other hand don't use QDesktopWidget which is deprecated, instead use QScreen:

screen_size = QGuiApplication.primaryScreen().size()