PieChart: Setting a single slice to have a gradient color

[slickorange]

I can set the gradient of the PieChart's slices by doing:

Shader shader = new RadialGradient(80, 80, 80, new int[]{ContextCompat.getColor(this, R.color.colorBronze), Color.parseColor("#FFFFFF")}, null, Shader.TileMode.MIRROR); chart.getRenderer().getPaintRender().setShader(shader);

The problem is that ALL slices then have this gradient.
Is it possible to set only one slice to have the gradient?

[iamdamjanmiloshevski]

I have resolved this issue by editing the library.

My approach:
Create an array of the colors for the gradient, then add that array as a parameter to the data set of the pie chart.

Then in the PieChartRenderer class in the drawDataSet method, comment or delete the part of the code mRenderPaint.setColor(dataSet.getColor(i) in that same method before drawing the slice draw the gradient like this
mRenderPaint.setShader(
new RadialGradient(center.x, center.y, radius, dataSet.getColor(j * 2), dataSet.getColor(j * 2 + 1),
Shader.TileMode.MIRROR));
add this code just above the last line in the method which is mBitmapCanvas.drawPath(mPathBuffer.,mRenderPaint)

Output:

Piece of code:
` int startColor1 = ContextCompat.getColor(context, R.color.start_color1);
int startColor2 = ContextCompat.getColor(context, R.color.start_color2);
int startColor3 = ContextCompat.getColor(context, R.color.start_color3);
int startColor4 = ContextCompat.getColor(context, R.color.start_color4);
int startColor5 = ContextCompat.getColor(context, R.color.start_color5);
int endColor1 = ContextCompat.getColor(context, R.color.end_color1);
int endColor2 = ContextCompat.getColor(context, R.color.end_color2);
int endColor3 = ContextCompat.getColor(context, R.color.end_color3);
int endColor4 = ContextCompat.getColor(context, R.color.end_color4);
int endColor5 = ContextCompat.getColor(context, R.color.end_color5);
int startColor6 = ContextCompat.getColor(context, R.color.brown_start);
int endColor6 = ContextCompat.getColor(context, R.color.brown_end);

List<Integer> colors = new ArrayList<>();
colors.add(endColor1);
colors.add(startColor1);
colors.add(startColor2);
colors.add(endColor2);
colors.add(startColor3);
colors.add(endColor3);
colors.add(endColor4);
colors.add(startColor4);
colors.add(startColor5);
colors.add(endColor5);
colors.add(endColor6);
colors.add(startColor6);

dataSet.setColors(colors);`

PieChartRenderer.java piece of code:
` protected void drawDataSet(Canvas c, IPieDataSet dataSet) {
//rest of code
//mRenderPaint.setColor(dataSet.getColor(j)); -- comment or delete this line
// rest of the code
//added piece of code below
mRenderPaint.setShader(
new RadialGradient(center.x, center.y, radius, dataSet.getColor(j * 2), dataSet.getColor(j * 2 + 1),
Shader.TileMode.MIRROR));
//end of added code
mBitmapCanvas.drawPath(mPathBuffer, mRenderPaint);

  angle += sliceAngle * phaseX;
}

MPPointF.recycleInstance(center);

}`

Hope it helps, cheers!