Standalone - no negative step values

wangmiaoduan · Apr 21, 2014 · 70866fa · 70866fa
1 parent 35e53d5
commit 70866fa
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Showing 2 changed files with 16 additions and 2 deletions.
diff --git a/dist/powerange.js b/dist/powerange.js
@@ -1464,7 +1464,7 @@ Powerange.prototype.setValue = function (offset, size) {
 
 Powerange.prototype.step = function(sliderSize, handleSize) {
   var dimension = sliderSize - handleSize
-    , part = percentage.from(this.options.step, this.options.max - this.options.min)
+    , part = percentage.from(this.checkStep(this.options.step), this.options.max - this.options.min)
     , interval = percentage.of(part, dimension)
     , steps = [];
 
@@ -1490,6 +1490,20 @@ Powerange.prototype.checkValues = function(start) {
   if (this.options.min >= this.options.max) this.options.min = this.options.max;
 };
 
+/**
+ * Make sure `step` is positive.
+ *
+ * @param {Number} value
+ * @returns {Number} this.options.step
+ * @api private
+ */
+
+Powerange.prototype.checkStep = function(value) {
+  if (value < 0) value = Math.abs(value);
+  this.options.step = value;
+  return this.options.step;
+};
+
 /**
  * Disable range slider.
  *