feat(slider): support control over change trigger

This PR adds a new option to the set value or set rangeValue behavior to optionally avoid the onChange callback

The change is backward compatible, because when the new parameter is omitted, it behaves like before (triggering the callback)

.slider('set value',10,false)

src/definitions/modules/slider.js

@@ -861,11 +861,12 @@ $.fn.slider = function(parameters) {
         },
 
         set: {
-          value: function(newValue) {
+          value: function(newValue, fireChange) {
+            fireChange = fireChange !== false;
             var toReset = previousValue === undefined;
             previousValue = previousValue === undefined ? module.get.value() : previousValue;
             module.update.value(newValue, function(value, thumbVal, secondThumbVal) {
-              if (!initialLoad || settings.fireOnInit){
+              if ((!initialLoad || settings.fireOnInit) && fireChange){
                 if (newValue !== previousValue) {
                   settings.onChange.call(element, value, thumbVal, secondThumbVal);
                 }
@@ -876,7 +877,8 @@ $.fn.slider = function(parameters) {
               }
             });
           },
-          rangeValue: function(first, second) {
+          rangeValue: function(first, second, fireChange) {
+            fireChange = fireChange !== false;
             if(module.is.range()) {
               var
                 min = module.get.min(),
@@ -899,7 +901,7 @@ $.fn.slider = function(parameters) {
               value = Math.abs(module.thumbVal - module.secondThumbVal);
               module.update.position(module.thumbVal, $thumb);
               module.update.position(module.secondThumbVal, $secondThumb);
-              if (!initialLoad || settings.fireOnInit) {
+              if ((!initialLoad || settings.fireOnInit) && fireChange) {
                 if (value !== previousValue) {
                   settings.onChange.call(element, value, module.thumbVal, module.secondThumbVal);
                 }