interacting.html

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    <title>Flot Examples</title>
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    <!--[if IE]><script language="javascript" type="text/javascript" src="../excanvas.pack.js"></script><![endif]-->
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    <body>
    <h1>Flot Examples</h1>

    <div id="placeholder" style="width:600px;height:300px"></div>

    <p>One of the goals of Flot is to support user interactions intelligently.
    Try hovering over the graph above and clicking on the points. A
    tooltip is easy to build with a bit of jQuery code and the data returned
    from the plot. Note that support for highlighting the points is
    currently missing.</p>

    <p id="clickdata"></p>

    <p id="hoverdata" style="display:none">Mouse hovers at
    (<span id="x"></span>, <span id="y"></span>).</p>

<script id="source" language="javascript" type="text/javascript">
$(function () {
    var sin = [], cos = [];
    for (var i = 0; i < 14; i += 0.5) {
        sin.push([i, Math.sin(i)]);
        cos.push([i, Math.cos(i)]);
    }

    $.plot($("#placeholder"),
           [ { data: sin, label: "sin(x)"}, { data: cos, label: "cos(x)" } ],
           { lines: { show: true },
             points: { show: true },
             grid: { hoverable: true, clickable: true } });

    function showTooltip(x, y, contents) {
        $('<div id="tooltip">' + contents + '</div>').css( {
            position: 'absolute',
            display: 'none',
            top: y + 5,
            left: x + 5,
            border: '1 px solid #fdd',
            padding: '2px',
            'background-color': '#fee',
            opacity: 0.80
        }).appendTo("body").fadeIn(200);
    }

    var previousPoint = null;
    $("#placeholder").bind("plothover", function (event, pos, item) {
        $("#x").text(pos.x.toFixed(2));
        $("#y").text(pos.y.toFixed(2));
        $("#hoverdata").show();

        if (item) {
            if (previousPoint != item.datapoint) {
                previousPoint = item.datapoint;
                
                $("#tooltip").remove();
                var x = item.datapoint[0].toFixed(2),
                    y = item.datapoint[1].toFixed(2);
                
                showTooltip(item.pageX, item.pageY,
                            item.series.label + " of " + x + " = " + y);
            }
        }
        else {
            $("#tooltip").remove();
            previousPoint = null;            
        }
    });

    $("#placeholder").bind("plotclick", function (event, pos, item) {
        if (item) {
            $("#clickdata").text("You clicked point " + item.dataIndex + " in " + item.series.label);
        }
    });
});
</script>

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