Improvements to highlight animation phase applying

Author: danielgindi

Charts/Classes/Renderers/BarChartRenderer.swift

@@ -262,15 +262,15 @@ public class BarChartRenderer: ChartDataRendererBase
 
         let left = x - barWidth + barspacehalf
         let right = x + barWidth - barspacehalf
-        let top = CGFloat(y1) * CGFloat(_animator.phaseY)
-        let bottom = CGFloat(y2) * CGFloat(_animator.phaseY)
+        let top = CGFloat(y1)
+        let bottom = CGFloat(y2)
 
         rect.origin.x = left
         rect.origin.y = top
         rect.size.width = right - left
         rect.size.height = bottom - top
 
-        trans.rectValueToPixel(&rect)
+        trans.rectValueToPixel(&rect, phaseY: _animator.phaseY)
     }
 
     public override func drawValues(context context: CGContext?)

Charts/Classes/Renderers/HorizontalBarChartRenderer.swift

@@ -221,15 +221,15 @@ public class HorizontalBarChartRenderer: BarChartRenderer
 
         let top = x - barWidth + barspacehalf
         let bottom = x + barWidth - barspacehalf
-        let left = CGFloat(y1) * CGFloat(_animator.phaseY)
-        let right = CGFloat(y2) * CGFloat(_animator.phaseY)
+        let left = CGFloat(y1)
+        let right = CGFloat(y2)
 
         rect.origin.x = left
         rect.origin.y = top
         rect.size.width = right - left
         rect.size.height = bottom - top
 
-        trans.rectValueToPixelHorizontal(&rect)
+        trans.rectValueToPixelHorizontal(&rect, phaseY: _animator.phaseY)
     }
 
     public override func getTransformedValues(trans trans: ChartTransformer, entries: [BarChartDataEntry], dataSetIndex: Int) -> [CGPoint]

Charts/Classes/Utils/ChartTransformer.swift

@@ -205,16 +205,11 @@ public class ChartTransformer: NSObject
     public func rectValueToPixel(inout r: CGRect, phaseY: CGFloat)
     {
         // multiply the height of the rect with the phase
-        if (r.origin.y > 0.0)
-        {
-            r.origin.y *= phaseY
-        }
-        else
-        {
-            var bottom = r.origin.y + r.size.height
-            bottom *= phaseY
-            r.size.height = bottom - r.origin.y
-        }
+        var bottom = r.origin.y + r.size.height
+        bottom *= phaseY
+        let top = r.origin.y * phaseY
+        r.size.height = bottom - top
+        r.origin.y = top
 
         r = CGRectApplyAffineTransform(r, valueToPixelMatrix)
     }
@@ -229,16 +224,11 @@ public class ChartTransformer: NSObject
     public func rectValueToPixelHorizontal(inout r: CGRect, phaseY: CGFloat)
     {
         // multiply the height of the rect with the phase
-        if (r.origin.x > 0.0)
-        {
-            r.origin.x *= phaseY
-        }
-        else
-        {
-            var right = r.origin.x + r.size.width
-            right *= phaseY
-            r.size.width = right - r.origin.x
-        }
+        var right = r.origin.x + r.size.width
+        right *= phaseY
+        let left = r.origin.x * phaseY
+        r.size.width = right - left
+        r.origin.x = left
 
         r = CGRectApplyAffineTransform(r, valueToPixelMatrix)
     }