# HG changeset patch
# User Ben Abbott <bpabbott@mac.com>
# Date 1237655083 14400
# Node ID 5cc15e4b4e5c499672c66697d04eb766b98cfb62
# Parent  b3268a0458f23fa19ec384773bee12b4724305c1
gnuplot_drawnow.m: Verify the gnuplot terminal is supported.

diff -r b3268a0458f2 -r 5cc15e4b4e5c scripts/ChangeLog
--- a/scripts/ChangeLog	Sat Mar 21 12:49:58 2009 -0400
+++ b/scripts/ChangeLog	Sat Mar 21 13:04:43 2009 -0400
@@ -1,5 +1,6 @@
 2009-03-21  Ben Abbott <bpabbott@mac.com>
 
+	* plot/gnuplot_drawnow.m: Verify the gnuplot terminal is supported.
 	* plot/__gnuplot_get_var__.m: Add function to get gnuplot variables.
 	* plot/print.m: Restore the behavior for option -S<num>,<num>.
 
diff -r b3268a0458f2 -r 5cc15e4b4e5c scripts/plot/gnuplot_drawnow.m
--- a/scripts/plot/gnuplot_drawnow.m	Sat Mar 21 12:49:58 2009 -0400
+++ b/scripts/plot/gnuplot_drawnow.m	Sat Mar 21 13:04:43 2009 -0400
@@ -40,13 +40,20 @@
     fid = [];
     printing = ! output_to_screen (gnuplot_trim_term (term));
     unwind_protect
-      plot_stream = open_gnuplot_stream (1, []);
-      [enhanced, implicit_margin] = gnuplot_set_term (plot_stream (1), true, h, term, file);
-      __go_draw_figure__ (h, plot_stream, enhanced, mono, printing, implicit_margin);
-      if (nargin == 5)
-        fid = fopen (debug_file, "wb");
-        enhanced = gnuplot_set_term (fid, true, h, term, file);
-        __go_draw_figure__ (h, fid, enhanced, mono, printing, implicit_margin);
+      plot_stream = open_gnuplot_stream (2, []);
+      available_terminals = __gnuplot_get_var__ (plot_stream, "GPVAL_TERMINALS");
+      available_terminals = regexp (available_terminals, "\\b\\w+\\b", "match");
+      if (any (strcmpi (available_terminals, gnuplot_trim_term (term))))
+        [enhanced, implicit_margin] = gnuplot_set_term (plot_stream (1), true, h, term, file);
+        __go_draw_figure__ (h, plot_stream, enhanced, mono, printing, implicit_margin);
+        if (nargin == 5)
+          fid = fopen (debug_file, "wb");
+          [enhanced, implicit_margin] = gnuplot_set_term (fid, true, h, term, file);
+          __go_draw_figure__ (h, fid, enhanced, mono, printing, implicit_margin);
+        endif
+      else
+        error ("gnuplot_drawnow: the gnuplot terminal, \"%s\", is not available.",
+               gnuplot_trim_term (term))
       endif
     unwind_protect_cleanup
       if (! isempty (plot_stream))