o: ActiveSupport::Cache::Entry	:@compressedF:@expires_in0:@created_atf1379639354.38502:@value"{I"
class:EFI"ProcessedAsset; FI"logical_path; FI"&heart/flot/jquery.flot.symbols.js; FI"pathname; FI"g/Users/cwabbott/work/innovationtime/heart/app/assets/javascripts/heart/flot/jquery.flot.symbols.js; FI"content_type; FI"application/javascript; FI"
mtime; FI"2013-09-06T09:46:51+09:00; FI"length; FiŚI"digest; F"%be9e1419f7306f0d3fea306656d4cc72I"source; FI"Ś/*
Flot plugin that adds some extra symbols for plotting points.

The symbols are accessed as strings through the standard symbol
choice:

  series: {
      points: {
          symbol: "square" // or "diamond", "triangle", "cross"
      }
  }

*/


(function ($) {
    function processRawData(plot, series, datapoints) {
        // we normalize the area of each symbol so it is approximately the
        // same as a circle of the given radius

        var handlers = {
            square: function (ctx, x, y, radius, shadow) {
                // pi * r^2 = (2s)^2  =>  s = r * sqrt(pi)/2
                var size = radius * Math.sqrt(Math.PI) / 2;
                ctx.rect(x - size, y - size, size + size, size + size);
            },
            diamond: function (ctx, x, y, radius, shadow) {
                // pi * r^2 = 2s^2  =>  s = r * sqrt(pi/2)
                var size = radius * Math.sqrt(Math.PI / 2);
                ctx.moveTo(x - size, y);
                ctx.lineTo(x, y - size);
                ctx.lineTo(x + size, y);
                ctx.lineTo(x, y + size);
                ctx.lineTo(x - size, y);
            },
            triangle: function (ctx, x, y, radius, shadow) {
                // pi * r^2 = 1/2 * s^2 * sin (pi / 3)  =>  s = r * sqrt(2 * pi / sin(pi / 3))
                var size = radius * Math.sqrt(2 * Math.PI / Math.sin(Math.PI / 3));
                var height = size * Math.sin(Math.PI / 3);
                ctx.moveTo(x - size/2, y + height/2);
                ctx.lineTo(x + size/2, y + height/2);
                if (!shadow) {
                    ctx.lineTo(x, y - height/2);
                    ctx.lineTo(x - size/2, y + height/2);
                }
            },
            cross: function (ctx, x, y, radius, shadow) {
                // pi * r^2 = (2s)^2  =>  s = r * sqrt(pi)/2
                var size = radius * Math.sqrt(Math.PI) / 2;
                ctx.moveTo(x - size, y - size);
                ctx.lineTo(x + size, y + size);
                ctx.moveTo(x - size, y + size);
                ctx.lineTo(x + size, y - size);
            },
						heart: function (ctx, x, y, radius, shadow) {
                // pi * r^2 = 1/2 * s^2 * sin (pi / 3)  =>  s = r * sqrt(2 * pi / sin(pi / 3))
               	var size = 1.5 * radius * Math.sqrt(Math.PI / 2);
                ctx.moveTo(x + size, y);
                ctx.lineTo(x, y + size);//bottom-most point
                ctx.lineTo(x - size, y);//left-most middle point
                ctx.lineTo(x - size, y - size/2);//left-most top point
								ctx.lineTo(x - size + size/4, y - size);//top-most left point
								ctx.lineTo(x - size/3, y - size);//top-left middle point (starts descent into heart from top-left toward right-middle)
								ctx.lineTo(x, y - size/3);//middle point of heart from top
								ctx.lineTo(x + size/3, y - size);//top-right middle point (starts descent into heart from top-right toward left-middle)
								ctx.lineTo(x + size - size/4, y - size);//top-most right point
								ctx.lineTo(x + size, y - size/2);//right-most top point
                ctx.lineTo(x + size, y);//right-most middle point
						}
        }

        var s = series.points.symbol;
        if (handlers[s])
            series.points.symbol = handlers[s];
    }
    
    function init(plot) {
        plot.hooks.processDatapoints.push(processRawData);
    }
    
    $.plot.plugins.push({
        init: init,
        name: 'symbols',
        version: '1.0'
    });
})(jQuery);
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