Added labels to make sure those don't need minimum width constraints. They don't.

redo/osxaltest/label.m

@@ -0,0 +1,61 @@
+// 31 july 2015
+#import "osxaltest.h"
+
+@implementation tLabel {
+	NSTextField *t;
+	id<tControl> parent;
+	NSLayoutPriority horzpri, vertpri;
+}
+
+- (id)init
+{
+	self = [super init];
+	if (self) {
+		self->t = [[NSTextField alloc] initWithFrame:NSZeroRect];
+		[self->t setStringValue:@"Label"];
+		[self->t setEditable:NO];
+		[self->t setSelectable:NO];
+		[self->t setDrawsBackground:NO];
+		[self->t setFont:[NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:NSRegularControlSize]]];
+		[self->t setBordered:NO];
+		[self->t setBezelStyle:NSTextFieldSquareBezel];
+		[self->t setBezeled:NO];
+		[[self->t cell] setLineBreakMode:NSLineBreakByClipping];
+		[[self->t cell] setScrollable:YES];
+		[self->t setTranslatesAutoresizingMaskIntoConstraints:NO];
+
+		self->parent = nil;
+
+		self->horzpri = [self->t contentHuggingPriorityForOrientation:NSLayoutConstraintOrientationHorizontal];
+		self->vertpri = [self->t contentHuggingPriorityForOrientation:NSLayoutConstraintOrientationVertical];
+	}
+	return self;
+}
+
+- (void)tSetParent:(id<tControl>)p addToView:(NSView *)v relayout:(BOOL)relayout
+{
+	self->parent = p;
+	[v addSubview:self->t];
+	if (relayout)
+		[self tRelayout];
+}
+
+- (void)tFillAutoLayout:(tAutoLayoutParams *)p
+{
+	// reset the hugging priority
+	[self->t setContentHuggingPriority:self->horzpri forOrientation:NSLayoutConstraintOrientationHorizontal];
+	[self->t setContentHuggingPriority:self->vertpri forOrientation:NSLayoutConstraintOrientationVertical];
+	p->view = self->t;
+	p->attachLeft = YES;
+	p->attachTop = YES;
+	p->attachRight = YES;
+	p->attachBottom = YES;
+}
+
+- (void)tRelayout
+{
+	if (self->parent != nil)
+		[self->parent tRelayout];
+}
+
+@end

redo/osxaltest/main.m

@@ -18,6 +18,7 @@ BOOL firstvert = YES;
 	tButton *button;
 	tSpinbox *spinbox;
 	tEntry *entry;
+	tLabel *label;
 
 	mainwin = [[tWindow alloc] init];
 	[mainwin tSetMargined:spaced];
@@ -69,6 +70,11 @@ BOOL firstvert = YES;
 	[hbox tAddControl:entry stretchy:YES];
 	[box tAddControl:hbox stretchy:NO];
 
+	hbox = [[tBox alloc] tInitVertical:!firstvert spaced:spaced];
+	label = [[tLabel alloc] init];
+	[hbox tAddControl:label stretchy:NO];
+	[box tAddControl:hbox stretchy:NO];
+
 	[mainwin tShow];
 }
 

redo/osxaltest/osxaltest.h

@@ -41,6 +41,9 @@ struct tAutoLayoutParams {
 @interface tEntry : NSObject<tControl>
 @end
 
+@interface tLabel : NSObject<tControl>
+@end
+
 @interface tSpinbox : NSObject<tControl>
 @end
 

redo/osxaltest/window.m

@@ -55,7 +55,7 @@
 {
 	[self->w cascadeTopLeftFromPoint:NSMakePoint(20, 20)];
 	[self->w makeKeyAndOrderFront:self];
-//	[[self->w contentView] tIsAmbiguous:0];
+	[[self->w contentView] tIsAmbiguous:0];
 }
 
 - (void)tRelayout