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<title>Flot Examples: Interacting with axes</title>
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$(function() {
function generate(start, end, fn) {
var res = [];
for (var i = 0; i <= 40; ++i) {
var x = start + i / 40 * (end - start);
res.push([x, fn(x)]);
}
return res;
}
var data = [
{ data: generate(0, 10, function (x) { return Math.sqrt(x);}), xaxis: 1, yaxis:1, lines: { show: true, fill: true }},
{ data: generate(0, 10, function (x) { return Math.sin(x);}), xaxis: 1, yaxis:2, points: { show: true }},
{ data: generate(0, 10, function (x) { return (x < 3 || x > 5) ? Math.cos(x) : null;}), xaxis: 1, yaxis:3 },
{ data: generate(2, 10, function (x) { return Math.tan(x);}), xaxis: 2, yaxis: 4, lines: { show: true, steps: true }},
{ data: generate(5, 15, function (x) { return 30 * Math.sin(x/2+3);}), xaxis: 3, yaxis: 5, bars: {show: true, fill: true, barWidth:0.1, align: "center"}}
];
var plot = $.plot("#placeholder", data, {
xaxes: [
{ position: 'bottom' },
{ position: 'bottom'},
{ position: 'top'}
],
yaxes: [
{ position: 'left' },
{ position: 'left' },
{ position: 'right' },
{ position: 'left' },
{ position: 'right' }
]
});
// Create a div for each axis
$.each(plot.getAxes(), function (i, axis) {
if (!axis.show)
return;
var box = axis.box;
$("<div class='axisTarget' style='position:absolute; left:" + box.left + "px; top:" + box.top + "px; width:" + box.width + "px; height:" + box.height + "px'></div>")
.data("axis.direction", axis.direction)
.data("axis.n", axis.n)
.css({ backgroundColor: "#f00", opacity: 0, cursor: "pointer" })
.appendTo(plot.getPlaceholder())
.hover(
function () { $(this).css({ opacity: 0.10 }) },
function () { $(this).css({ opacity: 0 }) }
)
.click(function () {
$("#click").text("You clicked the " + axis.direction + axis.n + "axis!")
});
});
// Add the Flot version string to the footer
$("#footer").prepend("Flot " + $.plot.version + " – ");
});
</script>
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<h2>Interacting with axes</h2>
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<div id="content">
<div class="demo-container">
<div id="placeholder" class="demo-placeholder"></div>
</div>
<p>With multiple axes, you sometimes need to interact with them. A simple way to do this is to draw the plot, deduce the axis placements and insert a couple of divs on top to catch events.</p>
<p>Try clicking an axis.</p>
<p id="click"></p>
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Copyright © 2007 - 2014 IOLA and Ole Laursen
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