Don't show a stale download link while running

diff --git a/nt3d.js b/nt3d.js
index 4cec096683d971b7c95b0b390c3e88725bad6a0e..5f7fad750de86a8064f433ab44d049e86f278a9b 100644 (file)
--- a/nt3d.js
+++ b/nt3d.js
@@ -197,6 +197,16 @@ nt3d = {
                        center);
        },
        go: function() {
+               // Remove any previous download links
+               var old_download_link = document.getElementById("nt3d_download");
+               if (old_download_link) {
+                       old_download_link.parentNode.removeChild(old_download_link);
+               }
+
+               // Continue in a callback, so that there's not a stale download
+               // link hanging around while we process.
+               setTimeout(function(the_this) { (function() {
+
                // Get params from form
                var params = [];
                for (var i = 0; i < this.user_params.length; i++) {
@@ -229,11 +239,6 @@ nt3d = {
                }
                this.stl += "endsolid " + this.user_function.name + "\n";
 
-               // Remove any previous download links
-               var old_download_link = document.getElementById("nt3d_download");
-               if (old_download_link) {
-                       old_download_link.parentNode.removeChild(old_download_link);
-               }
 
                // Offer result as download
                var download_link = document.createElement("a");
@@ -244,6 +249,8 @@ nt3d = {
                download_link.setAttribute("href", "data:application/sla," + encodeURIComponent(this.stl));
                this.ui.appendChild(download_link);
                setTimeout(function() { download_link.setAttribute("style", "-webkit-transition: background-color 0.4s; -moz-transition: background-color 0.4s; -o-transition: background-color 0.4s; -ms-transition: background-color 0.4s; transition: background-color 0.4s; background-color: inherit"); }, 0);
+
+               }).call(the_this); }, 0, this); // (We were in a callback this whole time, remember?)
        },
        framework: function (f, params) {
                this.user_function = f;