pyobjc_pencilkit_pkcanvasview_macos_window_quickstart.py

1import PencilKit
2from AppKit import NSWindow, NSApplication, NSApp, NSRect, NSBackingStoreBuffered
3from PyObjCTools import AppHelper
4
5class AppDelegate(NSObject):
6    def applicationDidFinishLaunching_(self, notification):
7        # Create a window to host the PencilKit canvas
8        rect = NSRect((100, 100), (600, 400))
9        self.window = NSWindow.alloc().initWithContentRect_styleMask_backing_defer_(
10            rect, 1 | 2 | 4, NSBackingStoreBuffered, False
11        )
12        
13        # Initialize a PKCanvasView (The core class of PencilKit)
14        # Note: PencilKit requires macOS 10.15 or later
15        canvas_view = PencilKit.PKCanvasView.alloc().init()
16        canvas_view.setFrame_(self.window.contentView().bounds())
17        canvas_view.setAutoresizingMask_(18) # Flexible width and height
18        
19        self.window.contentView().addSubview_(canvas_view)
20        self.window.makeKeyAndOrderFront_(None)
21        print("PencilKit Canvas Initialized successfully.")
22
23def main():
24    app = NSApplication.sharedApplication()
25    delegate = AppDelegate.alloc().init()
26    app.setDelegate_(delegate)
27    AppHelper.runEventLoop()
28
29if __name__ == "__main__":
30    main()