HOWTO: Create a bank of Gauge charts
- The original Gauge charts
- The Gauge charts now that they're adjustable
- Making the Gauge charts animated
Now that RGraph supports multiple charts on a single canvas
creating a
bank of Gauge charts or other meters is a simple matter
and allows you to create powerful responsive
control panels.
This example uses the Gauge chart though the principle is the same for all types of RGraph meter.
The original Gauge charts
These are the original Gauge charts before they have been made adjustable.
<script> new RGraph.Gauge({ id: 'cvs', min: 0, max: 100, value:67, options: { centerx: 100, marginLeft: 15, marginRight: 15, marginTop: 15, marginBottom: 15 } }).draw() new RGraph.Gauge({ id: 'cvs', min: 0, max: 100, value:45, options: { centerx: 300 marginLeft: 15, marginRight: 15, marginTop: 15, marginBottom: 15 } }).draw() new RGraph.Gauge({ id: 'cvs', min: 0, max: 100, value:13, options: { centerx: 500 marginLeft: 15, marginRight: 15, marginTop: 15, marginBottom: 15 } }).draw() </script>
The Gauge charts now that they're adjustable
These are the Gauge charts now that they have been made adjustable.
<script> new RGraph.Gauge({ id: 'cvs', min: 0, max: 100, value:67, options: { centerx: 100, adjustable: true, marginLeft: 15, marginRight: 15, marginTop: 15, marginBottom: 15 } }).draw() new RGraph.Gauge({ id: 'cvs', min: 0, max: 100, value:45, options: { centerx: 300, adjustable: true, marginLeft: 15, marginRight: 15, marginTop: 15, marginBottom: 15 } }).draw() new RGraph.Gauge({ id: 'cvs', min: 0, max: 100, value:13, options: { centerx: 500, adjustable: true, marginLeft: 15, marginRight: 15, marginTop: 15, marginBottom: 15 } }).draw() </script>
Making the Gauge charts animated
By default, the gauge charts aren't animated when they're adjustable, however, this is a simple addition and involves handling the adjusting yourself.
<script>
myGauge1 = new RGraph.Gauge({
id: 'cvs',
min: 0,
max: 100,
value:67,
options: {
centerx: 100,
marginLeft: 15,
marginRight: 15,
marginTop: 15,
marginBottom: 15
}
}).draw();
myGauge2 = new RGraph.Gauge({
id: 'cvs',
min: 0,
max: 100,
value:45,
options: {
centerx: 300,
marginLeft: 15,
marginRight: 15,
marginTop: 15,
marginBottom: 15
}
}).draw();
myGauge3 = new RGraph.Gauge({
id: 'cvs',
min: 0,
max: 100,
value:13,
options: {
centerx: 500,
marginLeft: 15,
marginRight: 15,
marginTop: 15,
marginBottom: 15
}
}).draw()
// You only need to add the custom event listener once
myGauge1.canvas.onmousedown = function (e)
{
var obj = RGraph.ObjectRegistry.getFirstObjectByXY(e);
if (obj) {
obj.value = obj.getValue(e);
obj.grow();
}
}
</script>