Made Listboxes non-editable in Mac OS X; also more TODOs.

listbox_darwin.go

@@ -150,6 +150,8 @@ func listboxArrayController(tableColumn C.id) C.id {
 Now with all that done, we're ready to creat a table column.
 
 Columns need string identifiers; we'll just reuse the item key.
+
+Editability is also handled here, as opposed to in NSTableView itself.
 */
 
 var (
@@ -157,11 +159,13 @@ var (
 
 	_initWithIdentifier = sel_getUid("initWithIdentifier:")
 	_tableColumnWithIdentifier = sel_getUid("tableColumnWithIdentifier:")
+	// _setEditable in sysdata_darwin.go
 )
 
 func newListboxTableColumn() C.id {
 	column := objc_alloc(_NSTableColumn)
 	column = C.objc_msgSend_id(column, _initWithIdentifier, listboxItemKey)
+	C.objc_msgSend_bool(column, _setEditable, C.BOOL(C.NO))
 	// TODO other properties?
 	bindListboxArray(column, newListboxArray())
 	return column

todo.md

@@ -27,11 +27,11 @@ so I don't forget:
 	- Index(n) is the name used by reflect.Value; use a different one?
 
 important things:
-- Cocoa Listboxes should not be editable
 - because the main event loop is not called if initialization fails, it is presently impossible for MsgBoxError() to work if UI initialization fails; this basically means we cannot allow initializiation to fail on Mac OS X if we want to be able to report UI init failures to the user with one
 - figure out where to auto-place windows in Cocoa (also window coordinates are still not flipped properly so (0,0) on screen is the bottom-left)
 	- also provide a method to center windows; Cocoa provides one for us but
 - I think Cocoa NSButton text is not vertically aligned properly...?
+	- and listbox item text is too low?
 - NSPopUpButton does allow no initial selection ([b setSelectedIndex:-1]); use it
 	- need to use it /after/ adding initial items, otherwise it won't work
 	- find out if I can do the same with the ListBoxes