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/* Flot plugin for rendering pie charts.

The plugin assumes that each series has a single data value, and that each
value is a positive integer or zero.  Negative numbers don't make sense for a
pie chart, and have unpredictable results.  The values do NOT need to be
passed in as percentages; the plugin will calculate the total and per-slice
percentages internally.

* Created by Brian Medendorp

* Updated with contributions from btburnett3, Anthony Aragues and Xavi Ivars

The plugin supports these options:

series: {
		pie: {
			show: true/false
			radius: 0-1 for percentage of fullsize, or a specified pixel length, or 'auto'
			innerRadius: 0-1 for percentage of fullsize or a specified pixel length, for creating a donut effect
			startAngle: 0-2 factor of PI used for starting angle (in radians) i.e 3/2 starts at the top, 0 and 2 have the same result
			tilt: 0-1 for percentage to tilt the pie, where 1 is no tilt, and 0 is completely flat (nothing will show)
			offset: {
				top: integer value to move the pie up or down
				left: integer value to move the pie left or right, or 'auto'
			},
			stroke: {
				color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#FFF')
				width: integer pixel width of the stroke
			},
			label: {
				show: true/false, or 'auto'
				formatter:  a user-defined function that modifies the text/style of the label text
				radius: 0-1 for percentage of fullsize, or a specified pixel length
				background: {
					color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#000')
					opacity: 0-1
				},
				threshold: 0-1 for the percentage value at which to hide labels (if they're too small)
			},
			combine: {
				threshold: 0-1 for the percentage value at which to combine slices (if they're too small)
				color: any hexidecimal color value (other formats may or may not work, so best to stick with something like '#CCC'), if null, the plugin will automatically use the color of the first slice to be combined
				label: any text value of what the combined slice should be labeled
			}
			highlight: {
				opacity: 0-1
			}
		}
	}

More detail and specific examples can be found in the included HTML file.

*/
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d=Math.PI*t.series.pie.startAngle,e=t.series.pie.radius>1?t.series.pie.radius:u*t.series.pie.radius;y.save(),y.translate(v,w),y.scale(1,t.series.pie.tilt),y.save();for(var f=d,g=0;g<m.length;++g)m[g].startAngle=f,b(m[g].angle,m[g].color,!0);if(y.restore(),t.series.pie.stroke.width>0){y.save(),y.lineWidth=t.series.pie.stroke.width,f=d;for(var g=0;g<m.length;++g)b(m[g].angle,t.series.pie.stroke.color,!1);y.restore()}return h(y),y.restore(),t.series.pie.label.show?c():!0}if(s){var j=b.getPlaceholder().width(),k=b.getPlaceholder().height(),l=s.children().filter(".legend").children().width()||0;y=e,x=!1,u=Math.min(j,k/t.series.pie.tilt)/2,w=k/2+t.series.pie.offset.top,v=j/2,"auto"==t.series.pie.offset.left?(t.legend.position.match("w")?v+=l/2:v-=l/2,u>v?v=u:v>j-u&&(v=j-u)):v+=t.series.pie.offset.left;var m=b.getData(),n=0;do n>0&&(u*=d),n+=1,f(),t.series.pie.tilt<=.8&&g();while(!i()&&c>n);n>=c&&(f(),s.prepend("<div class='error'>Could not draw pie with labels contained inside 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d=b.offset(),e=parseInt(c.pageX-d.left),f=parseInt(c.pageY-d.top),g=j(e,f);if(t.grid.autoHighlight)for(var h=0;h<z.length;++h){var i=z[h];i.auto!=a||g&&i.series==g.series||o(i.series)}g&&n(g.series,a);var k={pageX:c.pageX,pageY:c.pageY};s.trigger(a,[k,g])}function n(a,c){var d=p(a);-1==d?(z.push({series:a,auto:c}),b.triggerRedrawOverlay()):c||(z[d].auto=!1)}function o(a){null==a&&(z=[],b.triggerRedrawOverlay());var c=p(a);-1!=c&&(z.splice(c,1),b.triggerRedrawOverlay())}function p(a){for(var b=0;b<z.length;++b){var c=z[b];if(c.series==a)return b}return-1}function q(a,b){function c(a){a.angle<=0||isNaN(a.angle)||(b.fillStyle="rgba(255, 255, 255, "+d.series.pie.highlight.opacity+")",b.beginPath(),Math.abs(a.angle-2*Math.PI)>1e-9&&b.moveTo(0,0),b.arc(0,0,e,a.startAngle,a.startAngle+a.angle/2,!1),b.arc(0,0,e,a.startAngle+a.angle/2,a.startAngle+a.angle,!1),b.closePath(),b.fill())}var 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