Added feature to disable zooming the chart via double-tap (issue #96).
diff --git a/MPChartLib/src/com/github/mikephil/charting/charts/BarLineChartBase.java b/MPChartLib/src/com/github/mikephil/charting/charts/BarLineChartBase.java
index 0808527..ee744ed 100644
--- a/MPChartLib/src/com/github/mikephil/charting/charts/BarLineChartBase.java
+++ b/MPChartLib/src/com/github/mikephil/charting/charts/BarLineChartBase.java
@@ -79,6 +79,9 @@
      */
     protected boolean mPinchZoomEnabled = false;
 
+    /** flat that indicates if double tap zoom is enabled or not */
+    protected boolean mDoubleTapToZoomEnabled = true;
+
     /** if true, dragging / scaling is enabled for the chart */
     protected boolean mDragScaleEnabled = true;
 
@@ -279,7 +282,7 @@
     public void notifyDataSetChanged() {
         if (!mFixedYValues) {
             prepare();
-//            prepareContentRect();
+            // prepareContentRect();
             prepareMatrixValuePx();
         } else {
             calcMinMax(mFixedYValues);
@@ -399,17 +402,19 @@
         mLegend.setOffsetLeft(mOffsetLeft);
 
         prepareContentRect();
-        
+
         prepareMatrixValuePx();
 
-//        float scaleX = (float) ((getWidth() - mOffsetLeft - mOffsetRight) / mDeltaX);
-//        float scaleY = (float) ((getHeight() - mOffsetBottom - mOffsetTop) / mDeltaY);
-//
-//        Matrix val = new Matrix();
-//        val.postTranslate(0, -mYChartMin);
-//        val.postScale(scaleX, -scaleY);
-//
-//        mMatrixValueToPx.set(val);
+        // float scaleX = (float) ((getWidth() - mOffsetLeft - mOffsetRight) /
+        // mDeltaX);
+        // float scaleY = (float) ((getHeight() - mOffsetBottom - mOffsetTop) /
+        // mDeltaY);
+        //
+        // Matrix val = new Matrix();
+        // val.postTranslate(0, -mYChartMin);
+        // val.postScale(scaleX, -scaleY);
+        //
+        // mMatrixValueToPx.set(val);
 
         Matrix offset = new Matrix();
         // offset.postTranslate(mOffsetLeft, getHeight() - mOffsetBottom);
@@ -640,14 +645,14 @@
 
             drawXLabels(getHeight() - mOffsetBottom + mXLabels.mLabelHeight + yoffset * 1.5f);
 
-        } else if(mXLabels.getPosition() == XLabelPosition.BOTTOM_INSIDE) { 
-            
+        } else if (mXLabels.getPosition() == XLabelPosition.BOTTOM_INSIDE) {
+
             drawXLabels(getHeight() - getOffsetBottom() - yoffset);
-            
-        } else if(mXLabels.getPosition() == XLabelPosition.TOP_INSIDE) { 
-            
+
+        } else if (mXLabels.getPosition() == XLabelPosition.TOP_INSIDE) {
+
             drawXLabels(getOffsetTop() + yoffset + mXLabels.mLabelHeight);
-            
+
         } else { // BOTH SIDED
 
             drawXLabels(getOffsetTop() - 7);
@@ -1092,15 +1097,15 @@
         save.set(mMatrixTouch);
 
         float[] vals = new float[9];
-        
+
         save.getValues(vals);
-        
+
         // reset all translations and scaling
         vals[Matrix.MTRANS_X] = 0f;
         vals[Matrix.MTRANS_Y] = 0f;
         vals[Matrix.MSCALE_X] = 1f;
         vals[Matrix.MSCALE_Y] = 1f;
-        
+
         save.setValues(vals);
 
         refreshTouch(save);
@@ -1475,6 +1480,25 @@
     }
 
     /**
+     * Set this to true to enable zooming in by double-tap on the chart.
+     * Default: enabled
+     * 
+     * @param enabled
+     */
+    public void setDoubleTapToZoomEnabled(boolean enabled) {
+        mDoubleTapToZoomEnabled = enabled;
+    }
+
+    /**
+     * Returns true if zooming via double-tap is enabled false if not.
+     * 
+     * @return
+     */
+    public boolean isDoubleTapToZoomEnabled() {
+        return mDoubleTapToZoomEnabled;
+    }
+
+    /**
      * if set to true, the vertical grid will be drawn, default: true
      * 
      * @param enabled
diff --git a/MPChartLib/src/com/github/mikephil/charting/data/BarLineScatterCandleRadarData.java b/MPChartLib/src/com/github/mikephil/charting/data/BarLineScatterCandleRadarData.java
index 6366819..aa3397b 100644
--- a/MPChartLib/src/com/github/mikephil/charting/data/BarLineScatterCandleRadarData.java
+++ b/MPChartLib/src/com/github/mikephil/charting/data/BarLineScatterCandleRadarData.java
@@ -6,11 +6,12 @@
 import java.util.ArrayList;
 
 /**
- * Baseclass for all Line, Bar and ScatterData.
+ * Baseclass for all Line, Bar and ScatterData. Supports LimitLines.
  * 
  * @author Philipp Jahoda
  */
-public abstract class BarLineScatterCandleRadarData<T extends BarLineScatterCandleRadarDataSet<? extends Entry>> extends ChartData<T> {
+public abstract class BarLineScatterCandleRadarData<T extends BarLineScatterCandleRadarDataSet<? extends Entry>>
+        extends ChartData<T> {
 
     /** array of limit-lines that are set for this data object */
     private ArrayList<LimitLine> mLimitLines;
@@ -24,7 +25,7 @@
     }
 
     /**
-     * Adds a new limit line to the data.
+     * Adds a new LimitLine to the data.
      * 
      * @param limitLine
      */
@@ -51,10 +52,11 @@
      */
     public void resetLimitLines() {
         mLimitLines = null;
+        calcMinMax(mDataSets);
     }
 
     /**
-     * Returns the limitline array of this data object.
+     * Returns the LimitLine array of this data object.
      * 
      * @return
      */
@@ -63,10 +65,26 @@
     }
 
     /**
+     * Returns the LimitLine from the limitlines array at the specified index.
+     * 
+     * @param index
+     * @return
+     */
+    public LimitLine getLimitLine(int index) {
+        if (mLimitLines == null || mLimitLines.size() <= index)
+            return null;
+        else
+            return mLimitLines.get(index);
+    }
+
+    /**
      * Updates the min and max y-value according to the set limits.
      */
     private void updateMinMax() {
 
+        if (mLimitLines == null)
+            return;
+
         for (int i = 0; i < mLimitLines.size(); i++) {
 
             LimitLine l = mLimitLines.get(i);
diff --git a/MPChartLib/src/com/github/mikephil/charting/listener/BarLineChartTouchListener.java b/MPChartLib/src/com/github/mikephil/charting/listener/BarLineChartTouchListener.java
index 2236da3..f47a487 100644
--- a/MPChartLib/src/com/github/mikephil/charting/listener/BarLineChartTouchListener.java
+++ b/MPChartLib/src/com/github/mikephil/charting/listener/BarLineChartTouchListener.java
@@ -397,24 +397,30 @@
 
     @Override
     public boolean onDoubleTap(MotionEvent e) {
+        
+        // check if double-tap zooming is enabled
+        if(mChart.isDoubleTapToZoomEnabled()) {
+         
+            PointF trans = getTrans(e.getX(), e.getY());
 
-        PointF trans = getTrans(e.getX(), e.getY());
+            mChart.zoomIn(trans.x, trans.y);
 
-        mChart.zoomIn(trans.x, trans.y);
-
-        Log.i("BarlineChartTouch", "Double-Tap, Zooming In, x: " + trans.x + ", y: " + trans.y);
+            Log.i("BarlineChartTouch", "Double-Tap, Zooming In, x: " + trans.x + ", y: " + trans.y);
+        }
 
         return super.onDoubleTap(e);
     }
 
     @Override
     public void onLongPress(MotionEvent e) {
+        
+        mChart.fitScreen();
 
-        PointF trans = getTrans(e.getX(), e.getY());
-
-        mChart.zoomOut(trans.x, trans.y);
-
-        Log.i("BarlineChartTouch", "Longpress, Zooming Out, x: " + trans.x + ", y: " + trans.y);
+//        PointF trans = getTrans(e.getX(), e.getY());
+//
+//        mChart.zoomOut(trans.x, trans.y);
+//
+//        Log.i("BarlineChartTouch", "Longpress, Zooming Out, x: " + trans.x + ", y: " + trans.y);
     };
 
     @Override
diff --git a/MPChartLib/src/com/github/mikephil/charting/utils/LimitLine.java b/MPChartLib/src/com/github/mikephil/charting/utils/LimitLine.java
index a3d2396..f60ecb7 100644
--- a/MPChartLib/src/com/github/mikephil/charting/utils/LimitLine.java
+++ b/MPChartLib/src/com/github/mikephil/charting/utils/LimitLine.java
@@ -52,7 +52,7 @@
     public void setLineWidth(float width) {
 
         if (width < 0.2f)
-            width = 0.5f;
+            width = 0.2f;
         if (width > 12.0f)
             width = 12.0f;
         mLineWidth = Utils.convertDpToPixel(width);