Adds callback with ability to cancel event. Moves mouseup listener re…

jquery.tiny-draggable.js

@@ -1,5 +1,5 @@
-/*
-	jQuery tinyDraggable v1.0.2
+/*;
+	jQuery tinyDraggable v1.0.3
     Copyright (c) 2014 Simon Steinberger / Pixabay
     GitHub: https://github.com/Pixabay/jQuery-tinyDraggable
     More info: http://pixabay.com/blog/posts/p-52/
@@ -10,16 +10,29 @@
     $.fn.tinyDraggable = function(options){
         var settings = $.extend({ handle: 0, exclude: 0 }, options);
         return this.each(function(){
-            var dx, dy, el = $(this), handle = settings.handle ? $(settings.handle, el) : el;
+            var dx, dy, el = $(this), doc = $(document), handle = settings.handle ? $(settings.handle, el) : el;
             handle.on({
                 mousedown: function(e){
                     if (settings.exclude && ~$.inArray(e.target, $(settings.exclude, el))) return;
+                    if (settings.callback && settings.callback('start', e.pageX, e.pageY) === false) return;
+
                     e.preventDefault();
                     var os = el.offset(); dx = e.pageX-os.left, dy = e.pageY-os.top;
-                    $(document).on('mousemove.drag', function(e){ el.offset({top: e.pageY-dy, left: e.pageX-dx}); });
-                },
-                mouseup: function(e){ $(document).off('mousemove.drag'); }
+
+                    function onDrag(e){
+                      var x = e.pageX-dx, y = e.pageY-dy;
+                      if (!settings.callback || settings.callback('drag', x, y) !== false) {
+                        el.offset({top: y, left: x});
+                      }
+                    }
+                    function onStop(e){
+                      if (settings.callback && settings.callback('stop', e.pageX, e.pageY) === false) return;
+                      doc.off('mousemove.drag', onDrag).off('mouseup', onStop);
+                    }
+
+                    doc.on('mousemove.drag', onDrag).on('mouseup', onStop);
+                }
             });
         });
-    }
+    };
 }(jQuery));