/*=========================================================================================
    File Name: annotation.js
    Description: Flot annotation chart
    ----------------------------------------------------------------------------------------
    Item Name: Robust - Responsive Admin Theme
    Version: 1.2
    Author: PIXINVENT
    Author URL: http://www.themeforest.net/user/pixinvent
==========================================================================================*/

// Annotation chart
// ------------------------------
$(window).on("load", function(){

    var d1 = [];
    for (var i = 0; i < 20; ++i) {
        d1.push([i, Math.sin(i)]);
    }

    var data = [{ data: d1, label: "Pressure", color: "#3F51B5" }];

    var markings = [
        { color: "#f6f6f6", yaxis: { from: 1 } },
        { color: "#f6f6f6", yaxis: { to: -1 } },
        { color: "#000", lineWidth: 1, xaxis: { from: 2, to: 2 } },
        { color: "#000", lineWidth: 1, xaxis: { from: 8, to: 8 } }
    ];

    var placeholder = $("#annotation");

    var plot = $.plot(placeholder, data, {
        bars: { show: true, barWidth: 0.5, fill: true, lineWidth: 0, fillColor: { colors: [ { opacity: 0.5 }, { opacity: 0.8 } ] } },
        xaxis: { ticks: [], autoscaleMargin: 0.02 },
        yaxis: { min: -2, max: 2 },
        grid: {
            borderWidth: 1,
            borderColor: "#e9e9e9",
            color: '#999',
            minBorderMargin: 20,
            labelMargin: 10,
            margin: {
                top: 8,
                bottom: 20,
                left: 20
            },
            markings: markings
        },
    });

    var o = plot.pointOffset({ x: 2, y: -1.2});

    // Append it to the placeholder that Flot already uses for positioning

    placeholder.append("<div style='position:absolute;left:" + (o.left + 4) + "px;top:" + o.top + "px;color:#666;font-size:smaller'>Warming up</div>");

    o = plot.pointOffset({ x: 8, y: -1.2});
    placeholder.append("<div style='position:absolute;left:" + (o.left + 4) + "px;top:" + o.top + "px;color:#666;font-size:smaller'>Actual measurements</div>");

    // Draw a little arrow on top of the last label to demonstrate canvas
    // drawing

    var ctx = plot.getCanvas().getContext("2d");
    ctx.beginPath();
    o.left += 4;
    ctx.moveTo(o.left, o.top);
    ctx.lineTo(o.left, o.top - 10);
    ctx.lineTo(o.left + 10, o.top - 5);
    ctx.lineTo(o.left, o.top);
    ctx.fillStyle = "#000";
    ctx.fill();
});