similar to [canvasposition] this object returns the position of an arbitrary object on a certain canvas (and let's you manipulate it)

svn path=/trunk/externals/iem/iemguts/; revision=11810

1 files changed, 198 insertions, 0 deletions

diff --git a/src/canvasobjectposition.c b/src/canvasobjectposition.c
new file mode 100644
index 0000000..e51d894
--- /dev/null
+++ b/src/canvasobjectposition.c
@@ -0,0 +1,198 @@
+
+/******************************************************
+ *
+ * canvasposition - 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 and set the position of the containing
+ * abstraction within the parent-patch
+ *
+ * by default the position of the containing abstraction within the parent-patch is 
+ * queried
+ * you can give the "depth" as argument;
+ * e.g. [canvasobjectposition 1] will set/get the position of the abstraction containing the
+ * abstraction within its canvas.
+ */
+
+#include "m_pd.h"
+
+#include "g_canvas.h"
+#include "m_imp.h"
+
+/* ------------------------- canvasobjectposition ---------------------------- */
+
+static t_class *canvasobjectposition_class;
+
+typedef struct _canvasobjectposition
+{
+  t_object  x_obj;
+  t_canvas *x_parent;   // the canvas we are acting on
+  t_canvas *x_canvas; // an object in the x_canvas selected via the 2nd inlet (index)
+
+  t_outlet*xoutlet, *youtlet;
+
+} t_canvasobjectposition;
+
+static void canvasobjectposition_object(t_canvasobjectposition *x, t_float f);
+
+static void canvasobjectposition_bang(t_canvasobjectposition *x)
+{
+  t_canvas*c=x->x_canvas;
+  t_canvas*c0=x->x_parent;
+
+  int x1=0, y1=0, width=0, height=0;
+  t_atom alist[2];
+
+  if(!c) return;
+
+  x1=c->gl_obj.te_xpix;
+  y1=c->gl_obj.te_ypix;
+
+  if(NULL!=c0) {
+    width= (int)(c0->gl_screenx2 - c0->gl_screenx1);
+    height=(int)(c0->gl_screeny2 - c0->gl_screeny1);
+  }
+
+  SETFLOAT(alist, (t_float)width);
+  SETFLOAT(alist+1, (t_float)height);
+  outlet_list(x->youtlet, 0, 2, alist);
+
+  //  outlet_float(x->youtlet, y1);
+  SETFLOAT(alist, (t_float)x1);
+  SETFLOAT(alist+1, (t_float)y1);
+  outlet_list(x->xoutlet, 0, 2, alist);
+}
+
+static void canvasobjectposition_list(t_canvasobjectposition *x, t_symbol*s, int argc, t_atom*argv)
+{
+  t_canvas*c =x->x_canvas;
+  t_canvas*c0=x->x_parent;
+  int dx, dy;
+
+  if(!c) return;
+  //  c0=c->gl_owner;
+
+  if(argc==0){
+    canvasobjectposition_bang(x);
+    return;
+  }
+
+  if(argc!=2 || (A_FLOAT != (argv+0)->a_type) || (A_FLOAT != (argv+1)->a_type)) {
+    pd_error(x, "expected <x> <y> as new position");
+    return;
+  }
+  dx = atom_getint(argv+0) - c->gl_obj.te_xpix;
+  dy = atom_getint(argv+1) - c->gl_obj.te_ypix;
+
+  
+  if(c0&&glist_isvisible(c0))  {
+    gobj_displace((t_gobj*)c, c0, dx, dy);
+    canvas_fixlinesfor(c0, (t_text*)c);
+  } else {
+    c->gl_obj.te_xpix+=dx;
+    c->gl_obj.te_ypix+=dy;
+  }
+}
+
+static void canvasobjectposition_free(t_canvasobjectposition *x)
+{
+  outlet_free(x->xoutlet);
+  outlet_free(x->youtlet);
+}
+
+static void *canvasobjectposition_new(t_symbol*s, int argc, t_atom*argv)
+{
+  if(argc>2) {
+    error("syntax: canvasobjectposition <canvasdepth> [<objectindex>]");
+    return NULL;
+  } else {
+    t_canvasobjectposition *x = (t_canvasobjectposition *)pd_new(canvasobjectposition_class);
+    t_glist *glist=(t_glist *)canvas_getcurrent();
+    t_canvas *canvas=(t_canvas*)glist_getcanvas(glist);
+    int index=-1;
+    int depth=0;
+    
+    switch(argc) {
+    case 2:
+      index=atom_getint(argv+1);
+    case 1:
+      depth=atom_getint(argv);
+    default:
+      break;
+    }
+
+    if(depth<0)depth=0;
+
+    post("depth=%d\tindex=%d", depth, index);
+
+    while(depth && canvas) {
+      canvas=canvas->gl_owner;
+      depth--;
+    }
+    
+    x->x_parent = canvas;
+    x->x_canvas=NULL;
+    
+    x->xoutlet=outlet_new(&x->x_obj, &s_list);
+    x->youtlet=outlet_new(&x->x_obj, &s_list);
+    
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("object"));
+
+    if(index>=0)
+      canvasobjectposition_object(x, index);
+
+    return (x);
+  }
+  return NULL;
+}
+
+
+static void canvasobjectposition_object(t_canvasobjectposition *x, t_float f)
+{
+  t_gobj*obj=NULL;
+  int index=(int)f;
+  int i=index;
+  t_glist*glist=x->x_parent;
+
+  if(x->x_parent==NULL) return;
+
+  if(index<0) return;
+
+  if(NULL==glist) return;
+
+  obj=glist->gl_list;
+  while(i-- && obj) {
+    obj=obj->g_next;
+  }
+
+  x->x_canvas=NULL;
+  if(obj) {
+    x->x_canvas=(t_canvas*)obj;
+  }
+}
+
+void canvasobjectposition_setup(void)
+{
+  canvasobjectposition_class = class_new(gensym("canvasobjectposition"), 
+                                   (t_newmethod)canvasobjectposition_new, (t_method)canvasobjectposition_free, 
+                                   sizeof(t_canvasobjectposition), 0,
+                                   A_GIMME, 0);
+  class_addbang(canvasobjectposition_class, (t_method)canvasobjectposition_bang);
+  class_addlist(canvasobjectposition_class, (t_method)canvasobjectposition_list);
+
+  class_addmethod(canvasobjectposition_class, (t_method)canvasobjectposition_object, gensym("object"), A_FLOAT, 0);
+
+}