fix #1404

api/redraw.js

@@ -0,0 +1,26 @@
+"use strict"
+
+var coreRenderer = require("../render/render")
+
+module.exports = function($window) {
+	var renderService = coreRenderer($window)
+	renderService.setEventCallback(function(e) {
+		if (e.redraw !== false) redraw()
+	})
+	
+	var callbacks = []
+	function subscribe(key, callback) {
+		unsubscribe(key)
+		callbacks.push(key, callback)
+	}
+	function unsubscribe(key) {
+		var index = callbacks.indexOf(key)
+		if (index > -1) callbacks.splice(index, 2)
+	}
+    function redraw() {
+        for (var i = 1; i < callbacks.length; i += 2) {
+            callbacks[i]()
+        }
+    }
+	return {subscribe: subscribe, unsubscribe: unsubscribe, redraw: redraw, render: renderService.render}
+}