Began making the spaced property per-container.

container.go

@@ -32,11 +32,9 @@ type controlSizing interface {
 // All containers must embed containerbase.
 type containerbase struct {
 	child Control
+	spaced bool
 }
 
-// set to true to apply spacing to all windows
-var spaced bool = false
-
 func (c *container) resize(x, y, width, height int) {
 	if c.child == nil { // no children; nothing to do
 		return

container_darwin.go

@@ -49,7 +49,7 @@ const (
 
 func (c *container) beginResize() (d *sizing) {
 	d = new(sizing)
-	if spaced {
+	if c.spaced {
 		d.xmargin = macXMargin
 		d.ymargintop = macYMargin
 		d.ymarginbottom = d.ymargintop

container_unix.go

@@ -56,7 +56,7 @@ const (
 
 func (c *container) beginResize() (d *sizing) {
 	d = new(sizing)
-	if spaced {
+	if c.spaced {
 		d.xmargin = gtkXMargin
 		d.ymargintop = gtkYMargin
 		d.ymarginbottom = d.ymargintop

container_windows.go

@@ -122,7 +122,7 @@ func (c *container) beginResize() (d *sizing) {
 	d.baseY = baseY
 	d.internalLeading = internalLeading
 
-	if spaced {
+	if c.spaced {
 		d.xmargin = fromdlgunitsX(marginDialogUnits, d)
 		d.ymargintop = fromdlgunitsY(marginDialogUnits, d)
 		d.ymarginbottom = d.ymargintop

zz_test.go

@@ -18,6 +18,7 @@ import (
 
 var closeOnClick = flag.Bool("close", false, "close on click")
 var smallWindow = flag.Bool("small", false, "open a small window (test Mac OS X initial control sizing)")
+var spaced = flag.Bool("spaced", false, "enable spacing")
 
 type dtype struct {
 	Name    string
@@ -262,7 +263,6 @@ var tw *testwin
 
 // because Cocoa hates being run off the main thread, even if it's run exclusively off the main thread
 func init() {
-	flag.BoolVar(&spaced, "spaced", false, "enable spacing")
 	flag.Parse()
 	go func() {
 		tw = new(testwin)