Basic function to redraw a relation in a draw context. This has not b…

…een integrated with the undo mechanics yet.

js/draw.js

@@ -72,6 +72,20 @@ function draw_relation(draw_context, mei_graph, g_elem) {
 
 }
 
+function redraw_relation(draw_context,g_elem) {
+  var svg_g_elem = get_by_id(document, id_in_svg(draw_context, get_id(g_elem)));
+  if(!svg_g_elem){
+    console.log("Unable to redraw relation: ",g_elem," in draw context ", draw_context);
+    return;
+  }
+  unmark_secondaries(draw_context,mei_graph,g_elem);
+  svg_g_elem.parentElement.removeChild(svg_g_elem);
+  svg_g_elem = draw_relation(draw_context, mei_graph, g_elem);
+  mark_secondaries(draw_context,mei_graph,g_elem);
+  return svg_g_elem[0];
+}  
+
+
 
 // Essentially the same procedure as above, but for metarelations
 function draw_metarelation(draw_context, mei_graph, g_elem) {