jsrrdgraph: CGP.js: split draw(id) into prepare_draw(id) and draw(id)

1 files changed, 7 insertions, 1 deletions

diff --git a/js/CGP.js b/js/CGP.js
index 3c9ea90..add1a20 100644
--- a/js/CGP.js
+++ b/js/CGP.js
@@ -62,7 +62,7 @@ var mouse_scroll = function (e) {
         return false;
 };
 
-function draw(id) {
+function prepare_draw(id) {
         RrdGraph.prototype.mousex = 0;
         RrdGraph.prototype.mousedown = false;
 
@@ -104,6 +104,12 @@ function draw(id) {
         if (i === gfx.canvas.stlen) gfx.canvas.stidx = gfx.canvas.stlen-1;
         else gfx.canvas.stidx = i;
 
+        return rrdgraph;
+}
+
+function draw(id) {
+        var rrdgraph = prepare_draw(id);
+
         try {
                 rrdgraph.graph_paint();
         } catch (e) {