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.\" ========================================================================
.\"
.IX Title "Prima::noX11 3"
.TH Prima::noX11 3 "2009-02-24" "perl v5.20.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
Prima::noX11 \- Use Prima without X11
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&   use Prima::noX11;
\&   use Prima;
\&
\&   my $error = Prima::XOpenDisplay();
\&   if ( defined $error) {
\&        print "not connected to display: $error\en";
\&   } else {
\&        print "connected to display\en";
\&   }
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Prima will by default connect to X11 server on unix. To use
Prima functionality in modules or programs where this default
behavior is undesired, please follow the guidelines below.
.SS "No connection"
.IX Subsection "No connection"
In the beginning of a script or a module that is never intended to connect to
X11 display, add this:
.PP
.Vb 2
\&  use Prima::noX11;
\&  use Prima;
.Ve
.PP
It will be possible to connect to X11 server later on manually.
.SS "Manual connect to X11"
.IX Subsection "Manual connect to X11"
If connection to X11 is optional, use this code after \f(CW\*(C`use Prima::noX11\*(C'\fR
was invoked:
.PP
.Vb 6
\&   my $error = Prima::XOpenDisplay();
\&   if ( defined $error) {
\&        print "not connected to display: $error\en";
\&   } else {
\&        print "connected to display\en";
\&   }
.Ve
.SS "Checking if \s-1GUI\s0 functionality is accesiible."
.IX Subsection "Checking if GUI functionality is accesiible."
Without X11 connection, no \s-1GUI\s0 functionality such as screen grabbing will be
accessible. In addition to that functionality, windowing functions will only
become accessible after Prima::Application creates a single instance
\&\f(CW$::application\fR.
.PP
Therefore, if \f(CW$::application\fR is defined, then all \s-1GUI\s0 functions can be
safely used. If, on the contrary, it is not defined, initiate it as this:
.PP
.Vb 6
\&        unless ( $::application) {
\&                my $error = Prima::XOpenDisplay();
\&                die $error if defined $error;
\&                require Prima::Application;
\&                import Prima::Application;
\&        }
.Ve
.SH "AUTHOR"
.IX Header "AUTHOR"
Dmitry Karasik, <dmitry@karasik.eu.org>.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
Prima::X11