How to add labels into Chart.js canvas plugin?

Question

I\'m using the awesome plugin Chart.js, and I\'m trying to find the way of display labels within each percentage. So I googled it, and I found this pull: https://github.com/

Answer 1

I have figured out a way so that we can display the values for each region out side the graph.

Also I removed the rotation of the values and I referred to here

Add the following lines of code inside the Doughnut function. ( I have pasted the modified lines from the Chart.js file).

    var Doughnut = function(data,config,ctx){

    var segmentTotal = 0;

    //In case we have a canvas that is not a square. Minus 10 pixels as padding round the edge.
    var doughnutRadius = Min([height/2,width/2]) - 15;
    var cutoutRadius = doughnutRadius * (config.percentageInnerCutout/100);
    //Modified for setting the label values out side the arc
    var outRadius= doughnutRadius + cutoutRadius/3;
    var outRadiustop= doughnutRadius + cutoutRadius/5;
    ......
    ......
    ......

    function drawPieSegments (animationDecimal){
    :
    :



       if (config.scaleShowValues) {
                ctx.save();                
                ctx.translate(width / 2, height / 2);
                ctx.font = config.scaleFontStyle + ' ' + config.scaleFontSize + 'px ' + config.scaleFontFamily;
                ctx.textBaselne = 'middle';
                var a = (cumulativeAngle + cumulativeAngle + segmentAngle) / 2,
                    w = ctx.measureText(data[i].value).width,
                    b = Math.PI / 2 < a && a < Math.PI * 3 / 2;
                var c  = 0 < a && a < Math.PI;
                if(b){
                    ctx.textAlign = 'right';
                }
                else{
                    ctx.textAlign = 'left';
                }
                if(c){
                    ctx.translate(Math.cos(a) * outRadius +1 , Math.sin(a) * outRadius+1);

                }
                else{
                    ctx.translate(Math.cos(a) * outRadiustop, Math.sin(a) * outRadiustop);      
                }

                ctx.fillStyle = config.scaleFontColor;
                //If the segment angle less than 0.2, then the lables will overlap, so hiding it.
                if(segmentAngle > 0.2){
                    ctx.fillText(data[i].value,0,0);

                }
                ctx.restore();
     }

     ......
     ...... 

Now the values will be displayed out side each sections and it will not be rotated.