fix: added useColorsForLine for LineChartDataSet

Author: farfromrefug

src/charting/data/LineDataSet.ts

@@ -64,7 +64,9 @@ export class LineDataSet extends LineRadarDataSet<Entry> implements ILineDataSet
 
     private mDrawCircleHole = true;
 
-    private mUserColorsFoFill = false;
+    private mUserColorsForFill = false;
+
+    public useColorsForLine = false;
 
     /**
      * the max number allowed point before filtering. <= O means disabled
@@ -368,10 +370,10 @@ export class LineDataSet extends LineRadarDataSet<Entry> implements ILineDataSet
     }
 
     getUseColorsForFill() {
-        return this.mUserColorsFoFill;
+        return this.mUserColorsForFill;
     }
 
     setUseColorsForFill(value: boolean) {
-        this.mUserColorsFoFill = value;
+        this.mUserColorsForFill = value;
     }
 }

src/charting/renderer/LineChartRenderer.ts

@@ -560,7 +560,6 @@ export class LineChartRenderer extends LineRadarRenderer {
         const colors = dataSet.getColors() as any as { color: string | Color; [k: string]: any }[];
         const nbColors = colors.length;
         const xKey = dataSet.xProperty;
-        const useColorsForFill = dataSet.getUseColorsForFill();
         const renderPaint = this.renderPaint;
         let paintColorsShader;
         if (nbColors > 1) {
@@ -570,6 +569,7 @@ export class LineChartRenderer extends LineRadarRenderer {
 
         let oldShader;
         if (drawFilled) {
+            const useColorsForFill = dataSet.getUseColorsForFill();
             if (paintColorsShader && useColorsForFill) {
                 oldShader = renderPaint.getShader();
                 renderPaint.setShader(paintColorsShader);
@@ -587,13 +587,14 @@ export class LineChartRenderer extends LineRadarRenderer {
         }
 
         if (drawLine) {
-            if (paintColorsShader) {
+            const useColorsForLine = dataSet.useColorsForLine;
+            if (paintColorsShader && useColorsForLine) {
                 oldShader = renderPaint.getShader();
                 renderPaint.setShader(paintColorsShader);
             }
             trans.pathValueToPixel(linePath);
             this.drawPath(c, linePath, renderPaint);
-            if (paintColorsShader) {
+            if (paintColorsShader && useColorsForLine) {
                 renderPaint.setShader(oldShader);
                 oldShader = null;
             }