Fix decimal value #107

Author: aterrien

index.html

@@ -156,14 +156,15 @@ <h1>jQuery Knob</h1>
             <input class="knob" data-angleOffset=-125 data-angleArc=250 data-fgColor="#66EE66" data-rotation="anticlockwise" value="35">
         </div>
         <div class="demo" >
-            <p>&#215; 5-digit values, step 1000</p>
+            <p>&#215; 4-digit, step 0.1</p>
             <pre>
-data-step="1000"
-data-min="-15000"
-data-max="15000"
+data-step=".1"
+data-min="-10000"
+data-max="10000"
+value="0"
 data-displayPrevious=true
             </pre>
-            <input class="knob" data-min="-15000" data-displayPrevious=true data-max="15000" data-step="1000" value="-11000">
+            <input class="knob" data-min="-10000" data-displayPrevious=true data-max="10000" data-step=".1" value="0">
         </div>
         <div style="clear:both"></div>
         <div style="text-align: center">

js/jquery.knob.js

@@ -156,7 +156,7 @@
                         function () {
                             var val = {};
                             val[k] = $this.val();
-                            s.val(val);
+                            s.val(s._validate(val));
                         }
                     );
                 });
@@ -452,7 +452,8 @@
         };
 
         this._validate = function (v) {
-            return (~~ (((v < 0) ? -0.5 : 0.5) + (v/this.o.step))) * this.o.step;
+            var val = (~~ (((v < 0) ? -0.5 : 0.5) + (v/this.o.step))) * this.o.step;
+            return Math.round(val * 100) / 100;
         };
 
         // Abstract methods
@@ -549,7 +550,7 @@
                 a += this.PI2;
             }
 
-            ret = ~~ (0.5 + (a * (this.o.max - this.o.min) / this.angleArc)) + this.o.min;
+            ret = (a * (this.o.max - this.o.min) / this.angleArc) + this.o.min;
 
             this.o.stopper && (ret = max(min(ret, this.o.max), this.o.min));
 
@@ -635,7 +636,7 @@
                                 var v = s.o.parse(s.$.val()) + kv[kc] * m;
                                 s.o.stopper && (v = max(min(v, s.o.max), s.o.min));
 
-                                s.change(v);
+                                s.change(s._validate(v));
                                 s._draw();
 
                                 // long time keydown speed-up