I am having problems getting a gnome_canvas_item working. In an
initialization routine, I create a new line canvas item by doing:
line = gnome_canvas_item_new (gnome_canvas_root (root),
gnome_canvas_line_get_type(), NULL);
I get the following error when I execute this line:
Gtk-CRITICAL **: file gtkobject.c: line 939 (gtk_object_add_arg_type): assertion
`arg_type > GTK_TYPE_NONE' failed.
I assume I'm getting this because I haven't specified any points to draw
the line. This is by design, because I do the actual drawing later in a
draw routine by doing:
gnome_canvas_item_set (line,
"points", cp,
"fill_color", "orange",
NULL);
This line causes a segfault and I get the following error:
GnomeUI-WARNING **: gnome_canvas_item_set(): could not find argument
"points" in the `GnomeCanvasLine' class ancestry
I'm doing the exact same thing for a rectangle and it works fine for it.
I create the rectangle with no dimensions, and then I 'set' the
dimensions when I call the draw routine. Why doesn't this work for
lines?
Thanks
Jason
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