Added Mac OS X Labels and a bunch of TODOs. Now for Listboxes... oh boy...

sysdata_darwin.go

@@ -67,6 +67,9 @@ var (
 	_indexOfSelectedItem = sel_getUid("indexOfSelectedItem")
 	_addItemWithObjectValue = sel_getUid("addItemWithObjectValue:")
 	_insertItemWithObjectValueAtIndex = sel_getUid("insertItemWithObjectValue:atIndex:")
+	_setEditable = sel_getUid("setEditable:")
+	_setBordered = sel_getUid("setBordered:")
+	_setDrawsBackground = sel_getUid("setDrawsBackground:")
 )
 
 func controlShow(what C.id) {
@@ -211,6 +214,22 @@ var classTypes = [nctypes]*classData{
 		alttextsel:		_stringValue,
 	},
 	c_label:			&classData{
+		make:		func(parentWindow C.id, alternate bool) C.id {
+			label := objc_alloc(_NSTextField)
+			label = objc_msgSend_rect(label, _initWithFrame,
+				0, 0, 100, 100)
+			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))
+			// TODO others?
+			windowView := C.objc_msgSend_noargs(parentWindow, _contentView)
+			C.objc_msgSend_id(windowView, _addSubview, label)
+			return label
+		},
+		show:		controlShow,
+		hide:			controlHide,
+		settextsel:		_setStringValue,
+		textsel:		_stringValue,
 	},
 	c_listbox:			&classData{
 	},

todo.md

@@ -21,6 +21,8 @@ so I don't forget:
 - have Combobox.InsertBefore, Listbox.InsertBefore, Combobox.Delete, and Listbox.Delete return an error on invalid index before creation
 - make the Windows implementation of message boxes run on uitask
 	- ensure MsgBoxError can run if initialization failed if things change ever
+- should Labels be selectable?
+	- should message box text be selectable on all platforms or only on those that make it the default?
 
 important things:
 - ui.Go() should exit when the main() you pass in exits
@@ -29,6 +31,7 @@ important things:
 - I think Cocoa NSButton text is not vertically aligned properly...?
 - 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)
 - figure out what to do about deleting a nonexistent item; each backend responds differently by default
+- some Cocoa controls don't seem to resize correctly: Buttons have space around the edges and don't satisfy stretchiness; Labels in the grid test window get cropped
 - there's no GTK+ error handling whatsoever; we need to figure out how it works
 - make sure GTK+ documentation point differences don't matter
 - button sizes and LineEdit sizes on Windows seem too big; Comboboxes have margins