Fixed Area test time label weirdness by making Labels truncate their text instead of word-wrapping on all platforms. This doesn't explain GTK+/Wayland, alas.

gtkcalls_unix.go

@@ -203,7 +203,11 @@ var _emptystring = [1]C.gchar{0}
 var emptystring = &_emptystring[0]
 
 func gtk_label_new() *C.GtkWidget {
-	return C.gtk_label_new(emptystring)
+	label := C.gtk_label_new(emptystring)
+	C.gtk_label_set_line_wrap(togtklabel(label), C.FALSE)
+	// TODO explicitly set line wrap mode as well?
+	// TODO explicitly disable ellipsizing
+	return label
 	// TODO left-justify?
 }
 

label.go

@@ -7,6 +7,7 @@ import (
 )
 
 // A Label is a static line of text used to mark other controls.
+// Label text is drawn on a single line; text that does not fit is truncated.
 type Label struct {
 	lock		sync.Mutex
 	created	bool

sysdata_darwin.go

@@ -79,6 +79,8 @@ var (
 	_setEditable = sel_getUid("setEditable:")
 	_setBordered = sel_getUid("setBordered:")
 	_setDrawsBackground = sel_getUid("setDrawsBackground:")
+	_cell = sel_getUid("cell")
+	_setLineBreakMode = sel_getUid("setLineBreakMode:")
 	_setStyle = sel_getUid("setStyle:")
 	_setControlSize = sel_getUid("setControlSize:")
 	_setIndeterminate = sel_getUid("setIndeterminate:")
@@ -281,11 +283,25 @@ var classTypes = [nctypes]*classData{
 	},
 	c_label:			&classData{
 		make:		func(parentWindow C.id, alternate bool) C.id {
+			const (
+				_NSLineBreakByWordWrapping = iota
+				_NSLineBreakByCharWrapping
+				_NSLineBreakByClipping
+				_NSLineBreakByTruncatingHead
+				_NSLineBreakByTruncatingTail
+				_NSLineBreakByTruncatingMiddle
+			)
+
 			label := C.objc_msgSend_noargs(_NSTextField, _alloc)
 			label = initWithDummyFrame(label)
 			C.objc_msgSend_bool(label, _setEditable, C.BOOL(C.NO))
 			C.objc_msgSend_bool(label, _setBordered, C.BOOL(C.NO))
 			C.objc_msgSend_bool(label, _setDrawsBackground, C.BOOL(C.NO))
+			// this disables both word wrap AND ellipsizing in one fell swoop
+			// we have to send to the control's cell for this
+			C.objc_msgSend_uint(C.objc_msgSend_noargs(label, _cell),
+				_setLineBreakMode, _NSLineBreakByClipping)
+			// for a multiline label, we either use WordWrapping and send setTruncatesLastVisibleLine: to disable ellipsizing OR use one of those ellipsizing styles
 			applyStandardControlFont(label)
 			addControl(parentWindow, label)
 			return label

sysdata_windows.go

@@ -82,7 +82,8 @@ var classTypes = [nctypes]*classData{
 	},
 	c_label:			&classData{
 		name:			"STATIC",
-		style:			_SS_NOPREFIX | controlstyle,
+		// TODO add no-ellipsizing flags if I didn't do so already
+		style:			_SS_NOPREFIX | _SS_LEFTNOWORDWRAP | controlstyle,
 		xstyle:			0 | controlxstyle,
 	},
 	c_listbox:			&classData{

todo.md

@@ -1,10 +1,6 @@
 important things:
 - NSComboBox scans the entered text to see if it matches one of the items and returns the index of that item if it does; find out how to suppress this so that it returns -1 unless the item was chosen from the list (like the other platforms)
 - make sure mouse events trigger when we move the mouse over an Area with a button held on OS X
-- area test time label weirdness - this indicates bugs in Stack
-	- does not show full time initally on Windows; it does after you resize the window
-	- does not show initially on OS X; it shows up once you resize, and even shows up after you resize back to the original size
-		- I think both bugs and the GTK+ Wayland bug below are related...
 
 super ultra important things:
 - window sizes are inconsistent and wrong: we need to see on which platforms the titlebars/borders/etc. count...