Popobject.mui

Select a public-screen name through a Listview popup. Construction

creates List/Listview, installs embedded conversion hooks after

superclass construction and registers double-click acceptance. Supply

the inherited Popstring button and a live String-compatible object. No

screen is opened, selected as the application's screen, or retained by

this class.

Before each normal opening, clear the list, lock the public-screen list,

append each node name in enumeration order and unlock. Select the first

case-insensitive match with String_Contents. If no match exists, a

nonempty string selects Active_Off; an empty string requests entry zero.

Return success regardless of insertion failures. There is no live

refresh while the popup stays open.

An accepted deferred close sets String_Contents from the active entry if

one exists. It does not set String_Acknowledge. Double-click requests

Close(TRUE); cancellation does not copy a selection. Window and

queued-hook lifetimes follow Popobject/Popstring.

The List has no string construct/destruct hooks: inserted names remain

borrowed pointers into public-screen nodes after UnlockPubScreenList. No

individual public screen is locked for the popup lifetime. A screen

disappearing can invalidate its displayed name; this implementation does

not provide a stable copied snapshot. Selection of a name does not

ensure that screen still exists afterward.

Preserve the built-in popup arrangement; overriding Popobject_Object can

invalidate internal list assumptions. Constructor conversion hooks are

replaced by internal hooks. String_Contents must be readable and

non-NULL for comparison and the empty-string test.