Merge pull request #62 from ncarrillo/fix-progressbar

Fixed a bug in ProgressBar

Perspex.Controls/ProgressBar.cs

@@ -8,6 +8,7 @@ namespace Perspex.Controls
 {
     using Perspex.Controls.Primitives;
     using Perspex.Controls.Templates;
+    using System;
 
     /// <summary>
     /// A control used to indicate the progress of an operation.
@@ -15,13 +16,15 @@ namespace Perspex.Controls
     public class ProgressBar : RangeBase
     {
         /// <inheritdoc/>
+        /// 
+        private Border indicator;
         protected override Size ArrangeOverride(Size finalSize)
         {
             var size = base.ArrangeOverride(finalSize);
-            var b = this.Bounds;
+            this.indicator = this.indicator ?? this.GetTemplateChild<Border>("PART_Indicator");
-
+            
-            var indicator = this.GetTemplateChild<Border>("PART_Indicator");
+            double percent = this.Maximum == this.Minimum ? 1.0 : (this.Value - this.Minimum) / (this.Maximum - this.Minimum);
-            indicator.Width = finalSize.Width * (this.Value / 100);
+            indicator.Width = finalSize.Width * percent;
 
             return size;
         }