second example gives NullPointerException javax.swing.ImageIcon.loadImage

[trevor]

user=> (use 'rhizome.viz)
nil
user=> (def g
  #_=>     {:a [:b :c]
  #_=>      :b [:c]
  #_=>      :c [:a]})
#'user/g
user=> (view-graph (keys g) g
  #_=>     :node->descriptor (fn [n] {:label n}))
nil
user=> (view-graph (keys g) g
  #_=>     :cluster->descriptor (fn [n] {:label n})
  #_=>     :node->cluster identity
  #_=>     :cluster->parent {:b :c, :a :c})

NullPointerException   javax.swing.ImageIcon.loadImage (ImageIcon.java:309)
user=> (pst)
NullPointerException
  javax.swing.ImageIcon.loadImage (ImageIcon.java:309)
  javax.swing.ImageIcon.setImage (ImageIcon.java:369)
  rhizome.viz/view-image (viz.clj:53)
  rhizome.viz/view-image (viz.clj:50)
  clojure.core/comp/fn--4156 (core.clj:2341)
  user/eval2474 (NO_SOURCE_FILE:1)
  clojure.lang.Compiler.eval (Compiler.java:6619)
  clojure.lang.Compiler.eval (Compiler.java:6582)
  clojure.core/eval (core.clj:2852)
  clojure.main/repl/read-eval-print--6588/fn--6591 (main.clj:259)
  clojure.main/repl/read-eval-print--6588 (main.clj:259)
  clojure.main/repl/fn--6597 (main.clj:277)
nil
user=> (System/getProperty "java.runtime.version")
"1.8.0-ea-b94"

[ztellman]

Is graphviz installed? When it's not, you get a similar message. If it is, which version?

[trevor]

Yes, and the other examples generate without error.

% dot -version
dot - graphviz version 2.30.1 (20130712.1559)
libdir = "/usr/local/Cellar/graphviz/2.30.1/lib/graphviz"
Activated plugin library: libgvplugin_quartz.6.dylib
Using textlayout: textlayout:quartz
Activated plugin library: libgvplugin_dot_layout.6.dylib
Using layout: dot:dot_layout
Activated plugin library: libgvplugin_core.6.dylib
Using render: dot:core
Using device: dot:dot:core
The plugin configuration file:
    /usr/local/Cellar/graphviz/2.30.1/lib/graphviz/config6
        was successfully loaded.
    render  :  dot fig gd map pic pov ps quartz svg tk vml vrml xdot
    layout  :  circo dot fdp neato nop nop1 nop2 osage patchwork sfdp twopi
    textlayout  :  textlayout
    device  :  bmp canon cgimage cmap cmapx cmapx_np dot eps exr fig gd gd2 gif gv imap imap_np ismap jp2 jpe jpeg jpg pct pdf pic pict plain plain-ext png pov ps ps2 psd sgi svg svgz tga tif tiff tk vml vmlz vrml wbmp xdot
    loadimage   :  (lib) bmp eps gd gd2 gif jpe jpeg jpg pdf png ps svg

[ztellman]

Okay, apparently whenever there's a syntax error, it just wouldn't return an image. I've made it so there's a much less mysterious exception, and also fixed the syntax error (which apparently only appeared between 2.28 and 2.30, so I wasn't seeing it on my machine until I upgraded).

This is fixed in the new release, 0.1.9.

[trevor]

looks great, thanks!