Merge pull request #1061 from danielgindi/highlight-animation-fix

Fix highlight animation bug in stacked bar chart

Author: PhilJay

MPChartLib/src/com/github/mikephil/charting/renderer/BarChartRenderer.java

@@ -346,7 +346,7 @@ public void drawHighlighted(Canvas c, Highlight[] indices) {
 
                 if (isStack) {
                     y1 = h.getRange().from;
-                    y2 = h.getRange().to * mAnimator.getPhaseY();
+                    y2 = h.getRange().to;
                 } else {
                     y1 = e.getVal();
                     y2 = 0.f;
@@ -370,7 +370,7 @@ public void drawHighlighted(Canvas c, Highlight[] indices) {
                     final float arrowWidth = set.getBarSpace() / 2.f;
                     final float arrowHeight = arrowWidth * xToYRel;
 
-                    final float yArrow = y1 > -y2 ? y1 : y1;
+                    final float yArrow = (y1 > -y2 ? y1 : y1) * mAnimator.getPhaseY();
 
                     Path arrow = new Path();
                     arrow.moveTo(x + 0.4f, yArrow + offsetY);

MPChartLib/src/com/github/mikephil/charting/utils/Transformer.java

@@ -334,10 +334,21 @@ public void rectValueToPixel(RectF r) {
     public void rectValueToPixel(RectF r, float phaseY) {
 
         // multiply the height of the rect with the phase
-        if (r.top > 0)
-            r.top *= phaseY;
-        else
-            r.bottom *= phaseY;
+        r.top *= phaseY;
+        r.bottom *= phaseY;
+
+        mMatrixValueToPx.mapRect(r);
+        mViewPortHandler.getMatrixTouch().mapRect(r);
+        mMatrixOffset.mapRect(r);
+    }
+
+    /**
+     * Transform a rectangle with all matrices with potential animation phases.
+     *
+     * @param r
+
+     */
+    public void rectValueToPixelHorizontal(RectF r) {
 
         mMatrixValueToPx.mapRect(r);
         mViewPortHandler.getMatrixTouch().mapRect(r);
@@ -353,10 +364,8 @@ public void rectValueToPixel(RectF r, float phaseY) {
     public void rectValueToPixelHorizontal(RectF r, float phaseY) {
 
         // multiply the height of the rect with the phase
-        if (r.left > 0)
-            r.left *= phaseY;
-        else
-            r.right *= phaseY;
+        r.left *= phaseY;
+        r.right *= phaseY;
 
         mMatrixValueToPx.mapRect(r);
         mViewPortHandler.getMatrixTouch().mapRect(r);