37. PyQt6 QBrush

import sys
from PyQt6.QtWidgets import QApplication, QWidget
from PyQt6.QtGui import QGuiApplication, QPainter, QBrush
from PyQt6.QtCore import Qt


class App(QWidget):

    def __init__(self):
        super().__init__()
        self.text = None
        self.setMinimumSize(50, 50)
        self.initUI()

    def initUI(self):
        self.setWindowTitle("PyQt6 QBrush")

        self.setGeometry(100, 100, 400, 300)
        self.center()

    def paintEvent(self, event):
        qp = QPainter()
        qp.begin(self)
        self.drawBrushes(qp)
        qp.end()

    def drawBrushes(self, qp):
        brush = QBrush(Qt.BrushStyle.SolidPattern)

        qp.setBrush(brush)
        qp.drawRect(10, 15, 90, 60)

        brush.setStyle(Qt.BrushStyle.SolidPattern)

        qp.setBrush(brush)
        qp.drawRect(130, 15, 90, 60)

        brush.setStyle(Qt.BrushStyle.Dense1Pattern)
        qp.setBrush(brush)
        qp.drawRect(250, 15, 90, 60)

        brush.setStyle(Qt.BrushStyle.Dense2Pattern)
        qp.setBrush(brush)
        qp.drawRect(10, 105, 90, 60)

        brush.setStyle(Qt.BrushStyle.DiagCrossPattern)
        qp.setBrush(brush)
        qp.drawRect(130, 105, 90, 60)

        brush.setStyle(Qt.BrushStyle.Dense2Pattern)
        qp.setBrush(brush)
        qp.drawRect(250, 105, 90, 60)

        brush.setStyle(Qt.BrushStyle.Dense5Pattern)
        qp.setBrush(brush)
        qp.drawRect(250, 195, 90, 60)

        brush.setStyle(Qt.BrushStyle.VerPattern)
        qp.setBrush(brush)
        qp.drawRect(130, 195, 90, 60)

        brush.setStyle(Qt.BrushStyle.HorPattern)
        qp.setBrush(brush)
        qp.drawRect(10, 195, 90, 60)

    def center(self):
        qr = self.frameGeometry()
        cp = QGuiApplication.primaryScreen().availableGeometry().center()
        qr.moveCenter(cp)
        self.move(qr.topLeft())


if __name__ == "__main__":
    app = QApplication(sys.argv)
    cls_app = App()
    cls_app.show()
    sys.exit(app.exec())