Ticket #4991: simulate-drop-accepts-dropTarget-arg.patch

Index: tests/jquery.simulate.js
===================================================================
--- tests/jquery.simulate.js	(revision 3486)
+++ tests/jquery.simulate.js	(working copy)
@@ -107,20 +107,30 @@
 		}
 		return evt;
 	},
-
+	
 	drag: function(el) {
-		var self = this, center = this.findCenter(this.target), 
-			options = this.options,	x = Math.floor(center.x), y = Math.floor(center.y), 
-			dx = options.dx || 0, dy = options.dy || 0, target = this.target;
+		var center = this.findCenter(this.target);
+		var x = Math.floor(center.x), y = Math.floor(center.y);
+		if (this.options.dropTarget) {
+			var offset = this.fixedOffsetOfElement(this.options.dropTarget);
+			console.log('offset before dragstart', offset.dx, offset.dy);
+			var dx = offset.dx, dy = offset.dy;
+		}
+		else {
+			var dx = this.options.dx || 0, dy = this.options.dy || 0;
+		}
+		
 		var coord = { clientX: x, clientY: y };
-		this.simulateEvent(target, "mousedown", coord);
+		this.simulateEvent(this.target, "mousedown", coord);
 		coord = { clientX: x + 1, clientY: y + 1 };
 		this.simulateEvent(document, "mousemove", coord);
 		coord = { clientX: x + dx, clientY: y + dy };
 		this.simulateEvent(document, "mousemove", coord);
 		this.simulateEvent(document, "mousemove", coord);
-		this.simulateEvent(target, "mouseup", coord);
+		coord = { clientX: x + dx, clientY: y + dy };
+		this.simulateEvent(this.target, "mouseup", coord);
 	},
+	
 	findCenter: function(el) {
 		var el = $(this.target), o = el.offset();
 		return {