Volume 6A: Motif Programming Manual

/* trivial.uil −− Illustrate a minimal widget declaration. */

module trivial

object root : XmPushButton { };

end module;

The widget definition in the source code consists of three parts, not including the object keyword. The definition

begins with the widget name, which is a programmer−defined identifier. The name of the widget in this example is

root. The type of widget follows the name; a colon separates the name and the type. Legal widget types include all

of the standard Motif widgets as well as the names of specific instances of Motif widgets, such as XmMenuBar (a

RowColumn) or XmQuestionDialog (a MessageBox). You can find a complete list of widget type names in

Appendix D, Table of UIL Objects, of Volume Six B, Motif Reference Manual. UIL also supports non−Motif

widgets with the user_defined type, which we explain later in Chapter 26, Advanced UIL Programming. The

last, and usually largest, part of a widget definition is made up of the widget attributes. In our simple definition, we do

not specify any attributes, but even so, we must include the curly braces that would surround them. Widget definitions

always end with a semicolon.

After compiling the module, we can display its output with the showuid program. The following two commands

accomplish these steps:

uil −o trivial.uid trivial.uil

showuid trivial

You don't need to use the −root option because the PushButton uses the default ...