Added tRelayout to all controls. Also changed the order of stretchy controls in main.m because Auto Layout's defaults aren't optimal.

redo/osxaltest/box.m

@@ -26,6 +26,7 @@
 		[c tSetParent:self->parent addToView:self->sv];
 	[self->children addObject:c];
 	// TODO mark as needing relayout
+	[self tRelayout];
 }
 
 - (void)tSetParent:(id<tControl>)p addToView:(NSView *)v
@@ -38,6 +39,7 @@
 		c = (id<tControl>) obj;
 		[c tSetParent:self->parent addToView:self->sv];
 	}];
+	[self tRelayout];
 }
 
 - (void)tFillAutoLayoutHorz:(NSMutableArray *)horz
@@ -84,4 +86,10 @@
 // - lateral dimension: for each view of n+1, make other dimension next to first n
 // 	this way, subelement views get positioned right
 
+- (void)tRelayout
+{
+	if (self->parent != nil)
+		[self->parent tRelayout];
+}
+
 @end

redo/osxaltest/button.m

@@ -27,6 +27,7 @@
 {
 	self->parent = p;
 	[v addSubview:self->b];
+	[self tRelayout];
 }
 
 - (void)tFillAutoLayoutHorz:(NSMutableArray *)horz
@@ -45,4 +46,10 @@
 	[views setObject:self->b forKey:key];
 }
 
+- (void)tRelayout
+{
+	if (self->parent != nil)
+		[self->parent tRelayout];
+}
+
 @end

redo/osxaltest/main.m

@@ -23,12 +23,12 @@ BOOL margined = NO;
 	box = [[tBox alloc] tInitVertical:NO];
 
 	button = [[tButton alloc] tInitWithText:@"Button"];
-	[box tAddControl:button stretchy:NO];
+	[box tAddControl:button stretchy:YES];
 
 	[mainwin tSetControl:box];
 
 	spinbox = [[tSpinbox alloc] init];
-	[box tAddControl:spinbox stretchy:YES];
+	[box tAddControl:spinbox stretchy:NO];
 
 	[mainwin tShow];
 }

redo/osxaltest/osxaltest.h

@@ -11,14 +11,13 @@
 	extraVert:(NSMutableArray *)extraVert
 	views:(NSMutableDictionary *)views
 	first:(uintmax_t *)n;
+- (void)tRelayout;
 @end
 
 @interface tWindow : NSObject<tControl>
 - (void)tSetControl:(id<tControl>)cc;
 - (void)tSetMargined:(BOOL)m;
 - (void)tShow;
-// TODO this should probably in tControl
-- (void)tRelayout;
 @end
 
 @interface tBox : NSObject<tControl>

redo/osxaltest/spinbox.m

@@ -59,4 +59,10 @@
 	[views setObject:self->s forKey:keys];
 }
 
+- (void)tRelayout
+{
+	if (self->parent != nil)
+		[self->parent tRelayout];
+}
+
 @end