from PyQt-Frameless-Window

macosAcrylic.py

# coding:utf-8
import sys
import objc
import Cocoa
from ctypes import c_void_p
from PyQt6.QtWidgets import QApplication, QMainWindow, QWidget, QVBoxLayout, QLabel
from PyQt6.QtCore import Qt, QTimer

def getNSWindow(winId):
    """ Convert window handle to NSWindow """
    view = objc.objc_object(c_void_p=c_void_p(int(winId)))
    return view.window()

class MacWindowEffect:
    """ Mac OS window effect """
    def __init__(self, window):
        self.window = window

    def setAcrylicEffect(self):
        """ Set acrylic effect for window """
        # Get window dimensions
        frame = Cocoa.NSMakeRect(0, 0, self.window.width(), self.window.height())
        
        # Create visual effect view
        visualEffectView = Cocoa.NSVisualEffectView.alloc().initWithFrame_(frame)
        visualEffectView.setAutoresizingMask_(
            Cocoa.NSViewWidthSizable | Cocoa.NSViewHeightSizable)
        visualEffectView.setFrame_(frame)
        visualEffectView.setState_(Cocoa.NSVisualEffectStateActive)
        
        # Set material and blending mode (using Popover material for a nice acrylic look)
        visualEffectView.setMaterial_(Cocoa.NSVisualEffectMaterialPopover)
        visualEffectView.setBlendingMode_(Cocoa.NSVisualEffectBlendingModeBehindWindow)
        
        # Get NSWindow and content view
        nsWindow = getNSWindow(self.window.winId())
        
        # Enable shadow
        nsWindow.setHasShadow_(True)
        
        # Make window background transparent
        nsWindow.setBackgroundColor_(Cocoa.NSColor.clearColor())
        nsWindow.setOpaque_(False)
        
        # Add the visual effect view to the content view
        contentView = nsWindow.contentView()
        contentView.addSubview_positioned_relativeTo_(
            visualEffectView, Cocoa.NSWindowBelow, None)

class AcrylicWindow(QMainWindow):
    def __init__(self):
        super().__init__()
        
        # Set window properties
        self.setWindowTitle('PyQt6 Acrylic Window')
        self.setGeometry(100, 100, 500, 300)
        self.setAttribute(Qt.WidgetAttribute.WA_TranslucentBackground)
        
        # Create layout and widgets
        central_widget = QWidget()
        self.setCentralWidget(central_widget)
        
        layout = QVBoxLayout(central_widget)
        layout.setContentsMargins(20, 20, 20, 20)
        
        # Add content
        label = QLabel('PyQt6 Window with Acrylic Effect on macOS')
        label.setStyleSheet('color: black; font-size: 18px;')
        label.setAlignment(Qt.AlignmentFlag.AlignCenter)
        layout.addWidget(label)

    def showEvent(self, event):
        """ Apply acrylic effect when window is shown """
        super().showEvent(event)
        # Use a timer to ensure the window is fully rendered before applying effect
        QTimer.singleShot(100, self.applyEffect)
    
    def applyEffect(self):
        """ Apply the acrylic effect """
        effect = MacWindowEffect(self)
        effect.setAcrylicEffect()

def main():
    app = QApplication(sys.argv)
    window = AcrylicWindow()
    window.show()
    sys.exit(app.exec())

if __name__ == '__main__':
    main()