While rendering data across multiple charts, you can better visualize the same by using Synchronized Charts - where tooltip, crosshair & axis range are synced across charts. For example, if you zoom/pan any one of the charts, it'll automatically zoom/pan other charts. Same goes for ToolTip & Crosshair as well. Below example shows a Synchronized JavaScript Chart along with source code that you can run on your machine.
window.onload = function () {
var charts = [];
var toolTip = {
shared: true
},
legend = {
cursor: "pointer",
itemclick: function (e) {
if (typeof (e.dataSeries.visible) === "undefined" || e.dataSeries.visible) {
e.dataSeries.visible = false;
} else {
e.dataSeries.visible = true;
}
e.chart.render();
}
};
var systemDps = [], userDps=[], waitDps = [], buffersDps = [], cacheDps = [], usedDps=[], inboundDps = [], outboundDps = [], writeDps = [], readDps = [];
var cpuChartOptions = {
animationEnabled: true,
theme: "light2", // "light1", "light2", "dark1", "dark2"
title:{
text: "CPU Utilization"
},
toolTip: toolTip,
axisY: {
valueFormatString: "#0.#%",
},
legend: legend,
data: [{
type: "splineArea",
showInLegend: "true",
name: "User",
yValueFormatString: "#0.#%",
color: "#64b5f6",
xValueType: "dateTime",
xValueFormatString: "DD MMM YY HH:mm",
legendMarkerType: "square",
dataPoints: userDps
},{
type: "splineArea",
showInLegend: "true",
name: "System",
yValueFormatString: "#0.#%",
color: "#2196f3",
xValueType: "dateTime",
xValueFormatString: "DD MMM YY HH:mm",
legendMarkerType: "square",
dataPoints: systemDps
},{
type: "splineArea",
showInLegend: "true",
name: "Wait",
yValueFormatString: "#0.#%",
color: "#1976d2",
xValueType: "dateTime",
xValueFormatString: "DD MMM YY HH:mm",
legendMarkerType: "square",
dataPoints: waitDps
}]
};
var memoryChartOptions = {
animationEnabled: true,
theme: "light2",
title:{
text: "Memory Usage"
},
axisY: {
suffix: " GB"
},
toolTip: toolTip,
legend: legend,
data: [{
type: "splineArea",
showInLegend: "true",
name: "Cache",
color: "#e57373",
xValueType: "dateTime",
xValueFormatString: "DD MMM YY HH:mm",
yValueFormatString: "#.## GB",
legendMarkerType: "square",
dataPoints: cacheDps
},{
type: "splineArea",
showInLegend: "true",
name: "Buffers",
color: "#f44336",
xValueType: "dateTime",
xValueFormatString: "DD MMM YY HH:mm",
yValueFormatString: "#.## GB",
legendMarkerType: "square",
dataPoints: buffersDps
},{
type: "splineArea",
showInLegend: "true",
name: "Used",
color: "#d32f2f",
xValueType: "dateTime",
xValueFormatString: "DD MMM YY HH:mm",
yValueFormatString: "#.## GB",
legendMarkerType: "square",
dataPoints: usedDps
}]
}
var networkChartOptions = {
animationEnabled: true,
theme: "light2",
title:{
text: "Network Traffic"
},
axisY: {
suffix: " Kb/s"
},
toolTip: toolTip,
legend: legend,
data: [{
type: "splineArea",
showInLegend: "true",
name: "Outbound",
color: "#81c784",
xValueType: "dateTime",
xValueFormatString: "DD MMM YY HH:mm",
yValueFormatString: "#.## Kb/s",
legendMarkerType: "square",
dataPoints: outboundDps
},{
type: "splineArea",
showInLegend: "true",
name: "Inbound",
color: "#388e3c",
xValueType: "dateTime",
xValueFormatString: "DD MMM YY HH:mm",
yValueFormatString: "#.## Kb/s",
legendMarkerType: "square",
dataPoints: inboundDps
}]
}
var diskChartOptions = {
animationEnabled: true,
theme: "light2",
title:{
text: "Disk I/O (IOPS)"
},
axisY: {},
toolTip: toolTip,
legend: legend,
data: [{
type: "splineArea",
showInLegend: "true",
name: "Write",
color: "#ffb74d",
xValueType: "dateTime",
xValueFormatString: "DD MMM YY HH:mm",
yValueFormatString: "#.## ops/second",
legendMarkerType: "square",
dataPoints: writeDps
},{
type: "splineArea",
showInLegend: "true",
name: "Read",
color: "#f57c00",
xValueType: "dateTime",
xValueFormatString: "DD MMM YY HH:mm",
yValueFormatString: "#.## ops/second",
legendMarkerType: "square",
dataPoints: readDps
}]
}
charts.push(new CanvasJS.Chart("chartContainer1", cpuChartOptions));
charts.push(new CanvasJS.Chart("chartContainer2", memoryChartOptions));
charts.push(new CanvasJS.Chart("chartContainer3", networkChartOptions));
charts.push(new CanvasJS.Chart("chartContainer4", diskChartOptions));
$.get("https://canvasjs.com/data/gallery/javascript/server-matrics.json", function(data) {
for (var i = 1; i < data.length; i++) {
systemDps.push({x: parseInt(data[i].time), y: parseFloat(data[i].system)});
userDps.push({x: parseInt(data[i].time), y: parseFloat(data[i].user)});
waitDps.push({x: parseInt(data[i].time), y: parseFloat(data[i].wait)});
buffersDps.push({x: parseInt(data[i].time), y: parseFloat(data[i].buffers)});
cacheDps.push({x: parseInt(data[i].time), y: parseFloat(data[i].cache)});
usedDps.push({x: parseInt(data[i].time), y: parseFloat(data[i].used)});
inboundDps.push({x: parseInt(data[i].time), y: parseFloat(data[i].inbound)});
outboundDps.push({x: parseInt(data[i].time), y: parseFloat(data[i].outbound)});
writeDps.push({x: parseInt(data[i].time), y: parseFloat(data[i].write)});
readDps.push({x: parseInt(data[i].time), y: parseFloat(data[i].read)});
}
for( var i = 0; i < charts.length; i++){
charts[i].options.axisX = {
labelAngle: 0,
crosshair: {
enabled: true,
snapToDataPoint: true,
valueFormatString: "HH:mm"
}
}
}
syncCharts(charts, true, true, true); // syncCharts(charts, syncToolTip, syncCrosshair, syncAxisXRange)
for( var i = 0; i < charts.length; i++){
charts[i].render();
}
});
function syncCharts(charts, syncToolTip, syncCrosshair, syncAxisXRange) {
if(!this.onToolTipUpdated){
this.onToolTipUpdated = function(e) {
for (var j = 0; j < charts.length; j++) {
if (charts[j] != e.chart)
charts[j].toolTip.showAtX(e.entries[0].xValue);
}
}
}
if(!this.onToolTipHidden){
this.onToolTipHidden = function(e) {
for( var j = 0; j < charts.length; j++){
if(charts[j] != e.chart)
charts[j].toolTip.hide();
}
}
}
if(!this.onCrosshairUpdated){
this.onCrosshairUpdated = function(e) {
for(var j = 0; j < charts.length; j++){
if(charts[j] != e.chart)
charts[j].axisX[0].crosshair.showAt(e.value);
}
}
}
if(!this.onCrosshairHidden){
this.onCrosshairHidden = function(e) {
for( var j = 0; j < charts.length; j++){
if(charts[j] != e.chart)
charts[j].axisX[0].crosshair.hide();
}
}
}
if(!this.onRangeChanged){
this.onRangeChanged = function(e) {
for (var j = 0; j < charts.length; j++) {
if (e.trigger === "reset") {
charts[j].options.axisX.viewportMinimum = charts[j].options.axisX.viewportMaximum = null;
charts[j].options.axisY.viewportMinimum = charts[j].options.axisY.viewportMaximum = null;
charts[j].render();
} else if (charts[j] !== e.chart) {
charts[j].options.axisX.viewportMinimum = e.axisX[0].viewportMinimum;
charts[j].options.axisX.viewportMaximum = e.axisX[0].viewportMaximum;
charts[j].render();
}
}
}
}
for(var i = 0; i < charts.length; i++) {
//Sync ToolTip
if(syncToolTip) {
if(!charts[i].options.toolTip)
charts[i].options.toolTip = {};
charts[i].options.toolTip.updated = this.onToolTipUpdated;
charts[i].options.toolTip.hidden = this.onToolTipHidden;
}
//Sync Crosshair
if(syncCrosshair) {
if(!charts[i].options.axisX)
charts[i].options.axisX = { crosshair: { enabled: true }};
charts[i].options.axisX.crosshair.updated = this.onCrosshairUpdated;
charts[i].options.axisX.crosshair.hidden = this.onCrosshairHidden;
}
//Sync Zoom / Pan
if(syncAxisXRange) {
charts[i].options.zoomEnabled = true;
charts[i].options.rangeChanged = this.onRangeChanged;
}
}
}
}
In the above example, we are using below events and methods.
Chart - rangeChanging, rangeChanged
ToolTip - updated, hidden, showAtX, hide
Crosshair - updated, hidden, showAt, hide