Re: [Java-gnome-developer] Having problem with IconTheme

[Ismael J. <ml...@ju...>]

Manuel Ledesma wrote:
> Here is my code ...
> 
> IconTheme theme = IconTheme.getDefault();
> Pixbuf icon = theme.loadIcon("gnome-fs-directory", 16,
> IconLookupFlags.USE_BUILTIN);
> 
> Here is the exception that I'm always getting:
> java.lang.Exception: file gtkicontheme.c: line 1244
> (gtk_icon_theme_load_icon): assertion `error == NULL || *error == NULL'
> failed
> 	at org.gnu.glib.GObject.printStackTrace(GObject.java:644)
> 	at org.gnu.gtk.IconTheme.gtk_icon_theme_load_icon(Native Method)
> 	at org.gnu.gtk.IconTheme.loadIcon(IconTheme.java:70)
> 	at org.mels.TreeHelper.addRow(TreeHelper.java:128)
> 	at org.mels.TreeHelper.getTree(TreeHelper.java:79)
> 	at org.mels.GCvs.createTree(GCvs.java:68)
> 	at org.mels.GCvs.<init>(GCvs.java:52)
> 	at org.mels.GCvs.main(GCvs.java:116)
> 
> (java-gnome:10069): GLib-GObject-CRITICAL **: file gobject.c: line 1667
> (g_object_set_data_full): assertion `G_IS_OBJECT (object)' failed
> 
> Any help or suggestion would be greatly appreciated.
> 
> Thanks in advance.
> 

Hi,

I had a quick look and it seems like it is a bug in libgtk-java. In
IconTheme.java, the native method gtk_icon_theme_load_icon has one
incorrect parameter. The signature should be
gtk_icon_theme_load_icon(Handle, String, int, int, Handle), but it is
gtk_icon_theme_load_icon(Handle, String, int, int, int[]).

In addition there is also a problem with loadIcon(String, int,
IconLookupFlags). It calls the Pixbuf constructor without checking if
the Handle received from gtk_icon_theme_load_icon is null. However,
according to the javadoc for GTK, null is returned if no icon is found.

Anyways, I am not very familiar with the java-gnome codebase, so I might
be wrong. :)

Regards,
Ismael