diff --git a/redo/osxaltest/box.m b/redo/osxaltest/box.m
index b3d604ce..d17e3440 100644
--- a/redo/osxaltest/box.m
+++ b/redo/osxaltest/box.m
@@ -37,20 +37,23 @@
 	}];
 }
 
-- (uintmax_t)tAddToAutoLayoutDictionary:(NSMutableDictionary *)views keyNumber:(uintmax_t)n
+- (uintmax_t)tAddToAutoLayoutDictionary:(NSMutableDictionary *)views keyNumber:(uintmax_t)nn
 {
-	[self->children enumerateObjectsUsingBlock:^(id obj, NSUInteger index, BOOL *stop) {
-		NSObject<tControl> *c;
+	__block uintmax_t n = nn;
 
-		c = (NSObject<tControl> *) obj;
+	[self->children enumerateObjectsUsingBlock:^(id obj, NSUInteger index, BOOL *stop) {
+		id<tControl> c;
+
+		c = (id<tControl>) obj;
 		n = [c tAddToAutoLayoutDictionary:views keyNumber:n];
 	}];
 	return n;
 }
 
-- (NSString *)tBuildAutoLayoutConstraintsKeyNumber:(uintmax_t)n
+- (NSString *)tBuildAutoLayoutConstraintsKeyNumber:(uintmax_t)nn
 {
 	NSMutableString *constraints;
+	__block uintmax_t n = nn;
 
 	if (self->vertical)
 		constraints = [NSMutableString stringWithString:@"V:"];
diff --git a/redo/osxaltest/main.m b/redo/osxaltest/main.m
index c1d1a65c..49c5e6a5 100644
--- a/redo/osxaltest/main.m
+++ b/redo/osxaltest/main.m
@@ -1,6 +1,8 @@
 // 31 july 2015
 #import "osxaltest.h"
 
+// #qo LDFLAGS: -framework Foundation -framework AppKit
+
 @interface appDelegate : NSObject<NSApplicationDelegate>
 @end
 
@@ -8,6 +10,20 @@
 
 - (void)applicationDidFinishLaunching:(NSNotification *)note
 {
+	NSWindow *mainwin;
+	tWindowDelegate *delegate;
+
+	mainwin = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 320, 240)
+		styleMask:(NSTitledWindowMask | NSClosableWindowMask | NSMiniaturizableWindowMask | NSResizableWindowMask)
+		backing:NSBackingStoreBuffered
+		defer:YES];
+	[mainwin setTitle:@"Auto Layout Test"];
+
+	delegate = [tWindowDelegate new];
+	[mainwin setDelegate:delegate];
+
+	[mainwin cascadeTopLeftFromPoint:NSMakePoint(20, 20)];
+	[mainwin makeKeyAndOrderFront:self];
 }
 
 - (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication *)a
diff --git a/redo/osxaltest/osxaltest b/redo/osxaltest/osxaltest
new file mode 100755
index 00000000..f20c5c9c
Binary files /dev/null and b/redo/osxaltest/osxaltest differ
diff --git a/redo/osxaltest/osxaltest.h b/redo/osxaltest/osxaltest.h
index 6049d056..dd56a4c7 100644
--- a/redo/osxaltest/osxaltest.h
+++ b/redo/osxaltest/osxaltest.h
@@ -8,4 +8,9 @@
 - (uintmax_t)tAddToAutoLayoutDictionary:(NSMutableDictionary *)views keyNumber:(uintmax_t)n;
 @end
 
+@interface tWindowDelegate : NSObject<NSWindowDelegate>
+- (void)tSetControl:(NSObject<tControl> *)cc;
+- (void)tRelayout;
+@end
+
 extern NSString *tAutoLayoutKey(uintmax_t);
diff --git a/redo/osxaltest/util.m b/redo/osxaltest/util.m
new file mode 100644
index 00000000..c5ab8ea2
--- /dev/null
+++ b/redo/osxaltest/util.m
@@ -0,0 +1,7 @@
+// 1 august 2015
+#import "osxaltest.h"
+
+NSString *tAutoLayoutKey(uintmax_t n)
+{
+	return [NSString stringWithFormat:@"[view%ju]", n];
+}
diff --git a/redo/osxaltest/windelegate.m b/redo/osxaltest/windelegate.m
new file mode 100644
index 00000000..c7dd2f58
--- /dev/null
+++ b/redo/osxaltest/windelegate.m
@@ -0,0 +1,28 @@
+// 1 august 2015
+#import "osxaltest.h"
+
+@implementation tWindowDelegate {
+	NSObject<tControl> *c;
+}
+
+- (id)init
+{
+	self = [super init];
+	if (self)
+		self->c = NULL;
+	return self;
+}
+
+- (void)tSetControl:(NSObject<tControl> *)cc
+{
+	self->c = cc;
+}
+
+- (void)tRelayout
+{
+	if (self->c == NULL)
+		return;
+	// TODO
+}
+
+@end