No connection¶

In the beginning of a script or a module that is never intended to connect to X11 display, add this:

  use Prima::noX11;
  use Prima;

It will be possible to connect to X11 server later on manually.

Manual connect to X11¶

If connection to X11 is optional, use this code after "use Prima::noX11" was invoked:

   my $error = Prima::XOpenDisplay();
   if ( defined $error) {
        print "not connected to display: $error\n";
   } else {
        print "connected to display\n";
   }

Checking if GUI functionality is accesiible.¶

Without X11 connection, no GUI 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 $::application.

Therefore, if $::application is defined, then all GUI functions can be safely used. If, on the contrary, it is not defined, initiate it as this:

        unless ( $::application) {
                my $error = Prima::XOpenDisplay();
                die $error if defined $error;
                require Prima::Application;
                import Prima::Application;
        }