Is there a way to customize the CSS style of the grid line when the value is zero on my chart?
I'm looking to achieve something similar to this chart:
https://i.sstatic.net/vf5wO.png
Is there a way to customize the CSS style of the grid line when the value is zero on my chart?
I'm looking to achieve something similar to this chart:
https://i.sstatic.net/vf5wO.png
If you want to easily adjust the Marker color based on the value of the point, consider setting the color/background/border color property of the series markers to a function instead of a string:
$("#chart").kendoChart({
series: [ {
type: "line",
color: "#82D225",
markers: {
visible: true,
border: {
color: function(point){return point.value<=0 ? "red" : "#82D225"; }
}
},
data: [3300, 3200, 0, -300, -100, 200],
}]
});
Check out this DEMO for reference.
Changing the color of the line is more complex. You can use a gradient with different colors for values above and below 0:
Create an SVG gradient anywhere on your page:
<div style="height: 0px;">
<svg>
<defs>
<linearGradient id="theGrad" x1="0" x2="0" y1="0" y2="1">
<stop stop-color="#82D225" offset="0%"></stop>
<stop id="stop1" stop-color="#82D225" offset="40%"></stop>
<stop id="stop2" stop-color="red" offset="40%"></stop>
<stop stop-color="red" offset="100%"></stop>
</linearGradient>
</defs>
</svg>
</div>
Then, in the script, find the min and max of your dataset and update the gradient stop offsets:
var data = [3300, 3200, 0, -300, -100, 200];
var max = Math.max(...data);
var min = Math.min(...data);
var color = "url(#theGrad)";
var NeedGradient = max > 0 && min <= 0;
if (NeedGradient){
var range = max - min;
var stop = (max - 0) * 100 / range;
stop = Math.round(stop);
$("#stop1, #stop2").attr("offset", stop + "%");
} else {
max <=0 ? color = "red" : color = "#82D225";
}
Finally, apply the gradient to the line on chart render:
$("#chart").kendoChart({
series: [ {
type: "line",
color: function(point){return point.value<=0 ? "red" : "#82D225"; },
data: data,
}],
render: function(e) {
$('#chart svg g [clip-path="url(#kdef2)"] path').css("stroke", color);
}
});
For another example, take a look at this DEMO.
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