File jaxodraw-set-default-viewers.patch of Package jaxodraw

--- jaxodraw-2.1-0/src/main/java/net/sf/jaxodraw/util/JaxoPrefs.java.orig	2015-07-05 03:07:23.968000000 -0700
+++ jaxodraw-2.1-0/src/main/java/net/sf/jaxodraw/util/JaxoPrefs.java	2015-07-05 03:08:29.538000000 -0700
@@ -170,9 +170,9 @@
 
         PREFERENCES =
             new Preference[]{
-                new Preference(PREF_BROWSER, ""),
+                new Preference(PREF_BROWSER, "xdg-open"),
                 new Preference(PREF_EDITOR, ""),
-                new Preference(PREF_PSVIEWER, ""),
+                new Preference(PREF_PSVIEWER, "xdg-open"),
                 new Preference(PREF_LOOKNFEEL,
                     "javax.swing.plaf.metal.MetalLookAndFeel"),
                 new Preference(PREF_LANGUAGE, "english"),