Updated NSOutlineView example

[Sherm Pendley]

I've updated the NSOutlineView example at <http://www.dot-
app.org/OutlineSample.tgz>.

What's new:

The bug reported by Rich Morin has been fixed, as he suggested.

In controlTextDidEndEditing:, which I'd copied from the earlier NSBrowser example, a variable that referred to the outline view widget was misleadingly named $browser. It's been changed to $outline. (Thanks to Rich for pointing this one out, as well.)

The data source method outlineView:isItemExpandable: was incorrectly exported as returning an int ('i'), but a BOOL in Cocoa is a char ('c').

Added an outlineView:shouldExpandItem: delegate method, so that unreadable directories - the ones that were causing problems - cannot be expanded.

Added code to outlineView:objectValueForTableColumn:byItem: to display unreadable directories in red text, instead of the default black.

sherm--

Welcome to Rivendell, Mr. Anderson.