1 files changed, 53 insertions, 0 deletions
diff --git a/iemlib2/src/parentdollarzero.c b/iemlib2/src/parentdollarzero.c
new file mode 100644
index 0000000..85b79e9
--- /dev/null
+++ b/iemlib2/src/parentdollarzero.c
@@ -0,0 +1,53 @@
+/* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.
+
+iemlib2 written by Thomas Musil, Copyright (c) IEM KUG Graz Austria 2000 - 2006 */
+
+
+#include "m_pd.h"
+#include "g_canvas.h"
+#include "iemlib.h"
+
+
+/* -------------- parentdollarzero --------------- */
+/* -- receives the $0 value of the parent canvas --*/
+
+static t_class *parentdollarzero_class;
+
+typedef struct _parentdollarzero
+{
+  t_object     x_obj;
+  t_symbol     *s_parent_unique;
+  unsigned int x_is_there_a_parent;
+} t_parentdollarzero;
+
+static void parentdollarzero_bang(t_parentdollarzero *x)
+{
+  if(x->x_is_there_a_parent)
+    outlet_symbol(x->x_obj.ob_outlet, x->s_parent_unique);
+}
+
+static void *parentdollarzero_new(void)
+{
+  t_parentdollarzero *x = (t_parentdollarzero *)pd_new(parentdollarzero_class);
+  t_glist *glist = (t_glist *)canvas_getcurrent();
+  t_canvas *this_canvas = glist_getcanvas(glist);
+
+  x->x_is_there_a_parent = (unsigned int)(0!=this_canvas->gl_owner);
+
+  if(x->x_is_there_a_parent)
+    x->s_parent_unique = canvas_realizedollar((t_canvas *)this_canvas->gl_owner, gensym("$0"));
+  else
+    x->s_parent_unique = gensym("");
+  outlet_new(&x->x_obj, &s_symbol);
+  return (x);
+}
+
+void parentdollarzero_setup(void)
+{
+  parentdollarzero_class = class_new(gensym("parentdollarzero"), (t_newmethod)parentdollarzero_new,
+           0, sizeof(t_parentdollarzero), 0, 0);
+  class_addcreator((t_newmethod)parentdollarzero_new, gensym("parent$0"), 0);
+  class_addbang(parentdollarzero_class, (t_method)parentdollarzero_bang);
+//  class_sethelpsymbol(parentdollarzero_class, gensym("iemhelp/help-parentdollarzero"));
+}