1 files changed, 19 insertions, 6 deletions

diff --git a/env.js b/env.js
index 30d3dfa..04fb6fb 100644
--- a/env.js
+++ b/env.js
@@ -7,6 +7,7 @@ var environment = (function(){
   var strided_wires = [], wires = []
   var scale = [], root, tet, interval, duration
   var dot_color = "#333"
+  var drawing = true
 
   var palette = [
     "#ff0000",
@@ -87,7 +88,6 @@ var environment = (function(){
   environment.bind = function(){
     $(window).focus(environment.focus)
     $(window).blur(environment.blur)
-    $(window).mousemove(environment.mousemove)
     window.addEventListener("keydown", environment.keydown, true)
     $("#waveform").on("input", environment.setWaveform)
     $("#x").on("keydown", environment.stride)
@@ -98,8 +98,17 @@ var environment = (function(){
     $("#interval").on("input", environment.scale)
     $("#duration").on("input", environment.duration)
     $("#use_scale").on("change", environment.use_scale)
-    $(snap.node).on("mousedown", dot_grid.mousedown.bind(dot_grid))
-    $(window).on("mouseup", dot_grid.mouseup.bind(dot_grid))
+    if (is_mobile) {
+      snap.node.addEventListener("touchstart", getFirstTouch( dot_grid.mousedown.bind(dot_grid) ))
+      document.addEventListener("touchmove", getFirstTouch( environment.mousemove))
+      document.addEventListener("touchend", dot_grid.mouseup.bind(dot_grid) )
+      $("#draw").on("change", environment.check_drawing)
+    }
+    else {
+      $(snap.node).on("mousedown", dot_grid.mousedown.bind(dot_grid))
+      $(window).mousemove(environment.mousemove)
+      $(window).on("mouseup", dot_grid.mouseup.bind(dot_grid))
+    }
   }
   environment.blur = function(){
     last_p = null
@@ -109,6 +118,9 @@ var environment = (function(){
   environment.use_scale = function(){
     use_scale = $("#use_scale").get(0).checked
   }
+  environment.check_drawing = function(){
+    drawing = $("#draw").get(0).checked
+  }
   environment.duration = function(){
     duration = parseInt( $("#duration").val() ) || 1000
     duration /= 1000
@@ -314,8 +326,9 @@ var environment = (function(){
       }
     }
   }
-  DotGrid.prototype.mousedown = function(e){
-    var p = environment.positionFromEvent(e)
+  DotGrid.prototype.mousedown = function(touch, e){
+    if (! drawing) return
+    var p = environment.positionFromEvent(touch)
     var q = this.quantize(p)
     if (! this.active) {
       this.active = new Wire ({
@@ -326,7 +339,7 @@ var environment = (function(){
       return
     }
     else if (this.active) {
-      e.preventDefault()
+      (e || touch).preventDefault()
       this.active.setTail(q)
       this.active = null
     }