get the index of the containing abstraction (cool for connecting)

svn path=/trunk/externals/iem/iemguts/; revision=9761

1 files changed, 84 insertions, 0 deletions

diff --git a/src/canvasindex.c b/src/canvasindex.c
new file mode 100644
index 0000000..e352d02
--- /dev/null
+++ b/src/canvasindex.c
@@ -0,0 +1,84 @@
+
+/******************************************************
+ *
+ * canvasindex - implementation file
+ *
+ * copyleft (c) IOhannes m zmölnig
+ *
+ *   2007:forum::für::umläute:2007
+ *
+ *   institute of electronic music and acoustics (iem)
+ *
+ ******************************************************
+ *
+ * license: GNU General Public License v.2
+ *
+ ******************************************************/
+
+
+/* 
+ * this object provides a way to get the position of the containing abstraction
+ * within the parent-patch
+ * this makes it easy to (dis)connect this abstraction to others
+ */
+
+#include "m_pd.h"
+#include "g_canvas.h"
+
+int glist_getindex(t_glist *x, t_gobj *y);
+
+/* ------------------------- canvasindex ---------------------------- */
+
+static t_class *canvasindex_class;
+
+typedef struct _canvasindex
+{
+  t_object  x_obj;
+  t_canvas  *x_canvas;
+
+  t_outlet*xoutlet, *youtlet;
+} t_canvasindex;
+
+static void canvasindex_bang(t_canvasindex *x)
+{
+  t_canvas*c=x->x_canvas;
+  t_canvas*c0=0;
+
+  //  int index=-1;
+
+  if(!c) return;
+  c0=c->gl_owner;
+  if(!c0)return;
+
+  //  index=glist_getindex(c0, c);
+  //  index=glist_getindex(c0, (t_gobj*)c);
+  outlet_float(x->xoutlet, (t_float)(glist_getindex(c0, 0)));
+  outlet_float(x->xoutlet, (t_float)(glist_getindex(c0, (t_gobj*)c)));
+}
+
+static void canvasindex_free(t_canvasindex *x)
+{
+  outlet_free(x->xoutlet);
+  outlet_free(x->youtlet);
+}
+
+static void *canvasindex_new(void)
+{
+  t_canvasindex *x = (t_canvasindex *)pd_new(canvasindex_class);
+  t_glist *glist=(t_glist *)canvas_getcurrent();
+  t_canvas *canvas=(t_canvas*)glist_getcanvas(glist);
+
+  x->x_canvas = canvas;
+
+  x->xoutlet=outlet_new(&x->x_obj, &s_float);
+  x->youtlet=outlet_new(&x->x_obj, &s_float);
+
+  return (x);
+}
+
+void canvasindex_setup(void)
+{
+  canvasindex_class = class_new(gensym("canvasindex"), (t_newmethod)canvasindex_new,
+    (t_method)canvasindex_free, sizeof(t_canvasindex), 0, 0);
+  class_addbang(canvasindex_class, (t_method)canvasindex_bang);
+}