And we now have a window in the darwin test! You can't really do much with it since the Cocoa event loop isn't running, but it can be moved around!

darwintest/runtimetest.go

@@ -6,14 +6,21 @@ import (
 	"unsafe"
 )
 
-// #cgo LDFLAGS: -lobjc -framework Foundation
+// #cgo LDFLAGS: -lobjc -framework Foundation -framework AppKit
 // #include <stdlib.h>
 // #include <objc/message.h>
 // #include <objc/objc.h>
 // #include <objc/runtime.h>
+// /* TODO <objc/NSObjCRuntime.h not found?!?! */
+// /* TODO this HAS to be unsafe */
+// typedef unsigned long NSUInteger;
+// /* avoid depending on Objective-C */
+// #include <CoreGraphics/CGGeometry.h>
 // /* cgo doesn't handle ... */
 // id objc_msgSend_noargs(id obj, SEL sel) { return objc_msgSend(obj, sel); }
 // id objc_msgSend_strarg(id obj, SEL sel, char *a) { return objc_msgSend(obj, sel, a); }
+// id objc_msgSend_NSRect_uint_uint_bool(id obj, SEL sel, CGRect a, NSUInteger b, NSUInteger c, BOOL d) { return objc_msgSend(obj, sel, a, b, c, d); }
+// id objc_msgSend_id(id obj, SEL sel, id a) { return objc_msgSend(obj, sel, a); }
 import "C"
 
 func objc_getClass(class string) C.id {
@@ -30,7 +37,48 @@ func sel_getUid(sel string) C.SEL {
 	return C.sel_getUid(csel)
 }
 
+const (
+	NSBorderlessWindowMask = 0
+	NSTitledWindowMask = 1 << 0
+	NSClosableWindowMask = 1 << 1
+	NSMiniaturizableWindowMask = 1 << 2
+	NSResizableWindowMask = 1 << 3
+	NSTexturedBackgroundWindowMask = 1 << 8
+)
+
+const (
+//	NSBackingStoreRetained = 0			// "You should not use this mode."
+//	NSBackingStoreNonretained = 1		// "You should not use this mode."
+	NSBackingStoreBuffered = 2
+)
+
+var alloc = sel_getUid("alloc")
+
 func main() {
+	NSWindow := objc_getClass("NSWindow")
+	NSWindowinit :=
+		sel_getUid("initWithContentRect:styleMask:backing:defer:")
+	makeKeyAndOrderFront := sel_getUid("makeKeyAndOrderFront:")
+
+	// need an NSApplication first - see https://github.com/TooTallNate/NodObjC/issues/21
+	NSApplication := objc_getClass("NSApplication")
+	sharedApplication := sel_getUid("sharedApplication")
+	C.objc_msgSend_noargs(NSApplication, sharedApplication)
+
+	rect := C.CGRect{
+		origin:	C.CGPoint{100, 100},
+		size:		C.CGSize{320, 240},
+	}
+	style := C.NSUInteger(NSTitledWindowMask | NSClosableWindowMask)
+	backing := C.NSUInteger(NSBackingStoreBuffered)
+	deferx := C.BOOL(C.YES)
+	window := C.objc_msgSend_noargs(NSWindow, alloc)
+	window = C.objc_msgSend_NSRect_uint_uint_bool(window, NSWindowinit, rect, style, backing, deferx)
+	C.objc_msgSend_id(window, makeKeyAndOrderFront, window)
+	select{}
+}
+
+func helloworld() {
 	_hello := C.CString("hello, world\n")
 	defer C.free(unsafe.Pointer(_hello))