Added a copy of the spinbox code with just one view containing the two controls. This is going to hurt is it...

redo/osxaltest/spinbox.m_

@@ -0,0 +1,81 @@
+// 31 july 2015
+#import "osxaltest.h"
+
+// leave a whole lot of space around the alignment rect, just to be safe
+@interface tSpinboxContainer : NSView
+@end
+
+@implementation tSpinboxContainer
+
+- (NSEdgeInsets)alignmentRectInsets
+{
+	return NSEdgeInsetsMake(50, 50, 50, 50);
+}
+
+@end
+
+@implementation tSpinbox {
+	tSpinboxContainer *c;
+	NSTextField *t;
+	NSStepper *s;
+	id<tControl> parent;
+}
+
+- (id)init
+{
+	self = [super init];
+	if (self) {
+		self->c = [[tSpinboxContainer alloc] initWithFrame:NSZeroRect];
+
+		self->t = [[NSTextField alloc] initWithFrame:NSZeroRect];
+		[self->t setSelectable:YES];
+		[self->t setFont:[NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSRegularControlSize]]];
+		[self->t setBordered:NO];
+		[self->t setBezelStyle:NSTextFieldSquareBezel];
+		[self->t setBezeled:YES];
+		[[self->t cell] setLineBreakMode:NSLineBreakByClipping];
+		[[self->t cell] setScrollable:YES];
+		[self->t setTranslatesAutoresizingMaskIntoConstraints:NO];
+		[self->c addSubview:self->t];
+
+		self->s = [[NSStepper alloc] initWithFrame:NSZeroRect];
+		[self->s setIncrement:1];
+		[self->s setValueWraps:NO];
+		[self->s setAutorepeat:YES];
+		[self->s setTranslatesAutoresizingMaskIntoConstraints:NO];
+		[self->c addSubview:self->s];
+
+		self->parent = nil;
+	}
+	return self;
+}
+
+- (void)tSetParent:(id<tControl>)p addToView:(NSView *)v
+{
+	self->parent = p;
+	[v addSubview:self->c];
+}
+
+- (void)tFillAutoLayoutHorz:(NSMutableArray *)horz
+	vert:(NSMutableArray *)vert
+	extra:(NSMutableArray *)extra
+	extraVert:(NSMutableArray *)extraVert
+	views:(NSMutableDictionary *)views
+	first:(uintmax_t *)n
+{
+	NSString *key;
+
+	key = tAutoLayoutKey(*n);
+	(*n)++;
+	[horz addObject:[NSString stringWithFormat:@"[%@]", key]];
+	[vert addObject:[NSString stringWithFormat:@"[%@]", key]];
+	[views setObject:self->c forKey:key];
+}
+
+- (void)tRelayout
+{
+	if (self->parent != nil)
+		[self->parent tRelayout];
+}
+
+@end