XTrestle checks for X-style ``-display'' and ``-geometry'' command-line switches and installs a top-level window accordingly. If your application install more than one top-level window, you may find the routines in the XParam interface helpful.
INTERFACE XTrestle; IMPORT TrestleComm, VBT; EXCEPTION Error; PROCEDURE Install (v : VBT.T; applName : TEXT := NIL; inst : TEXT := NIL; windowTitle: TEXT := NIL; iconTitle : TEXT := NIL; bgColorR : REAL := -1.0; bgColorG : REAL := -1.0; bgColorB : REAL := -1.0; iconWindow : VBT.T := NIL ) RAISES {TrestleComm.Failure, Error}; <* LL.sup = VBT.mu *>
END XTrestle.
The syntax of these switches is described in the X manpage and in The X Window System [XWindowSystem] .
If there is a -display argument, it will be made the default Trestle connection for those procedures in the Trestle interface that take a Trestle.T as a parameter.
The TrestleComm.Failure exception is raised if a call to Trestle raises that exception. The Error exception is raised if the parameter following -display or -geometry contains any syntax errors (or is missing).
This is like Trestle.Install except that the locking level is different and the command line is parsed for X-style -display and -geometry options.