Example of building an AppKit app, complete with UI and AppDelegate

examples/appkit.js

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+'use strict';
+
+const objc = require('../src/index');
+
+objc.import('AppKit');
+
+const {
+  NSApplication,
+  NSColor,
+  NSTextView,
+  NSWindow,
+} = objc;
+
+// For app lifecycle, refer to:
+// https://github.com/TooTallNate/NodObjC/blob/master/examples/NodeCocoaHelloWorld.app/Contents/MacOS/app.js
+
+const AppDelegate = objc.createClass('AppDelegate', 'NSObject', {
+  'applicationWillBecomeActive:': (self, cmd, notification) => {
+    console.log('-[UIApplicationDelegate applicationWillBecomeActive:]');
+  },
+  'applicationDidFinishLaunching:': (self, cmd, notification) => {
+    console.log('-[UIApplicationDelegate application:didFinishLaunchingWithOptions:]');
+    return 1;
+  },
+  'application:willFinishLaunchingWithOptions:': (self, cmd, application, options) => {
+    console.log('-[UIApplicationDelegate application:willFinishLaunchingWithOptions:]');
+  },
+  'application:didFinishLaunchingWithOptions:': (self, cmd, application, options) => {
+    console.log('-[UIApplicationDelegate application:didFinishLaunchingWithOptions:]');
+    return 1;
+  },
+
+  _encodings: {
+    'applicationWillBecomeActive:': ['v', ['@', ':', '@']],
+    'applicationDidFinishLaunching:': ['v', ['@', ':', '@']],
+    'application:willFinishLaunchingWithOptions:': ['v', ['@', ':', '@', '@']],
+    'application:didFinishLaunchingWithOptions:': ['c', ['@', ':', '@', '@']],
+  }
+});
+const delegate = AppDelegate.new();
+
+const app = NSApplication.sharedApplication();
+
+// I can't get the symbol 'NSApplicationActivationPolicyRegular', somehow...
+// app.setActivationPolicy(objc.NSApplicationActivationPolicyRegular);
+app.setActivationPolicy(0);
+
+// Until get/set is implemented, we can achieve the same using setDelegate().
+app.setDelegate_(delegate);
+
+// TODO: convert this NSArray<NSString*> to char*[] and pass it into
+// NSApplicationMain. We might need ref-array-napi for this.
+// https://github.com/Janealter/ref-array-napi
+// const argv = objc.NSProcessInfo.new().arguments();
+
+// Not sure why I can't get NSApplicationMain via objc.NSApplicationMain...
+// const lib = new ffi.Library(null, {
+//   NSApplicationMain: ['int', ['int', 'string']],
+// });
+
+// Run the app. For now, we effectively pass no args. We have to read
+// NSApplicationMain from our dynamicLib because it's a method, not a class, so
+// won't be found by objc_getClass (which the objc library calls internally).
+// lib.NSApplicationMain(0, '');
+
+// FIXME: as various symbol lookups are failing, maybe best to refer back to how
+// NodObjC does it:
+// https://github.com/TooTallNate/NodObjC/blob/e4710fb8b73d3a2860de1e959e335a6de3e2191c/lib/import.js#L147
+
+const CGFloat = objc.types.double;
+const CGPoint = objc.defineStruct('CGPoint', {
+  x: CGFloat,
+  y: CGFloat
+});
+
+const CGSize = objc.defineStruct('CGSize', {
+  width: CGFloat,
+  height: CGFloat
+});
+
+const CGRect = objc.defineStruct('CGRect', {
+  origin: CGPoint,
+  size: CGSize
+});
+
+const win = NSWindow.alloc().initWithContentRect_styleMask_backing_defer_(
+  CGRect.new(
+    CGPoint.new(0, 0),
+    CGSize.new(200, 200),
+  ),
+  // Failing to look up these symbols.
+  // objc.NSTitledWindowMask | objc.NSResizableWindowMask | objc.NSClosableWindowMask
+  1 << 0 | 1 << 3 | 1 << 1,
+  // objc.NSBackingStoreBuffered
+  2,
+  false,
+);
+win.setAlphaValue_(0);
+win.cascadeTopLeftFromPoint_(CGPoint.new(20, 20));
+win.setTitle_('Hello, World');
+win.makeKeyAndOrderFront_(win);
+win.center();
+win.setBackgroundColor_(NSColor.greenColor());
+win.animator().setAlphaValue_(1);
+
+const textV = NSTextView.alloc().initWithFrame_(
+  CGRect.new(
+    CGPoint.new(0, 100),
+    CGSize.new(100, 100),
+  )
+);
+
+// textV.setAutoresizingMask(objc.NSViewWidthSizable | objc.NSViewMinYMargin);
+textV.setAutoresizingMask_(2 | 8);
+win.contentView().addSubview(textV);
+
+// NSApplicationMain doesn't seem to result in the application launch methods
+// getting called, so we'll use this run method instead (sadly ignoring the CLI
+// args passed in). We can refer to the CLI args by closing over them, anyway.
+app.activateIgnoringOtherApps_(true);
+app.run();