Highchart export server prevent 0 value in the pdf - highcharts

Question

I am using highchart export server for exporting the highchart as psd in itextsharp.
I have created a handler that will give me the highchart as png image this image is rendered into the itext pdf.
So my rendering is: Convert the highchart to image using json file that will be used for rendering it into the pdf.
Expected: http://jsfiddle.net/9owxLgm9/1/
The problem is I am not able to add the code that will prevent the rendering of 0 values in the highchart pdf
formatter: function () {
if (this.y != 0) {
return Highcharts.numberFormat(this.percentage, 0) + ' %';
}
},
so my pdf images render something like this
http://jsfiddle.net/9owxLgm9/2/
ie it also shows the 0 values.
Is there any way i can remove the 0 based values in the json file

Answer 1

I don't know if it's really the result you want, but you can remove empty values / stats labels from the pie chart with this simple formatter:
formatter: function() {
if (this.y != 0) {
return this.y +'%';
} else {
return null;
}
}
Your updated demo here.
The above code will output the percentages as label value, so if you want to keep the names as label, you simply need to replace return this.y +'%'; by return this.point.name;
Here's another example with names as label (also following your fiddle).

Answer 2

The solution was to add a formatter function
"pie": {
"allowPointSelect": true,
"cursor": "pointer",
"dataLabels": {
"enabled": true,
"formatter": "function () {if (this.y != 0) { return Highcharts.numberFormat(this.percentage, 0) + ' %';} }",
"format": "{point.percentage:.2f} %",
"distance": 4,
"filter": { "property": "percentage", "operator": ">", "value": 1}
},
"showInLegend": true
}