Add jquery and flot to catapult/third_party.

third_party/flot/jquery.flot.pie.js

+/* Flot plugin for rendering pie charts.
+
+Copyright (c) 2007-2014 IOLA and Ole Laursen.
+Licensed under the MIT license.
+
+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.
+
+*/
+
+(function($) {
+
+        // Maximum redraw attempts when fitting labels within the plot
+
+        var REDRAW_ATTEMPTS = 10;
+
+        // Factor by which to shrink the pie when fitting labels within the plot
+
+        var REDRAW_SHRINK = 0.95;
+
+        function init(plot) {
+
+                var canvas = null,
+                        target = null,
+                        options = null,
+                        maxRadius = null,
+                        centerLeft = null,
+                        centerTop = null,
+                        processed = false,
+                        ctx = null;
+
+                // interactive variables
+
+                var highlights = [];
+
+                // add hook to determine if pie plugin in enabled, and then perform necessary operations
+
+                plot.hooks.processOptions.push(function(plot, options) {
+                        if (options.series.pie.show) {
+
+                                options.grid.show = false;
+
+                                // set labels.show
+
+                                if (options.series.pie.label.show == "auto") {
+                                        if (options.legend.show) {
+                                                options.series.pie.label.show = false;
+                                        } else {
+                                                options.series.pie.label.show = true;
+                                        }
+                                }
+
+                                // set radius
+
+                                if (options.series.pie.radius == "auto") {
+                                        if (options.series.pie.label.show) {
+                                                options.series.pie.radius = 3/4;
+                                        } else {
+                                                options.series.pie.radius = 1;
+                                        }
+                                }
+
+                                // ensure sane tilt
+
+                                if (options.series.pie.tilt > 1) {
+                                        options.series.pie.tilt = 1;
+                                } else if (options.series.pie.tilt < 0) {
+                                        options.series.pie.tilt = 0;
+                                }
+                        }
+                });
+
+                plot.hooks.bindEvents.push(function(plot, eventHolder) {
+                        var options = plot.getOptions();
+                        if (options.series.pie.show) {
+                                if (options.grid.hoverable) {
+                                        eventHolder.unbind("mousemove").mousemove(onMouseMove);
+                                }
+                                if (options.grid.clickable) {
+                                        eventHolder.unbind("click").click(onClick);
+                                }
+                        }
+                });
+
+                plot.hooks.processDatapoints.push(function(plot, series, data, datapoints) {
+                        var options = plot.getOptions();
+                        if (options.series.pie.show) {
+                                processDatapoints(plot, series, data, datapoints);
+                        }
+                });
+
+                plot.hooks.drawOverlay.push(function(plot, octx) {
+                        var options = plot.getOptions();
+                        if (options.series.pie.show) {
+                                drawOverlay(plot, octx);
+                        }
+                });
+
+                plot.hooks.draw.push(function(plot, newCtx) {
+                        var options = plot.getOptions();
+                        if (options.series.pie.show) {
+                                draw(plot, newCtx);
+                        }
+                });
+
+                function processDatapoints(plot, series, datapoints) {
+                        if (!processed) {
+                                processed = true;
+                                canvas = plot.getCanvas();
+                                target = $(canvas).parent();
+                                options = plot.getOptions();
+                                plot.setData(combine(plot.getData()));
+                        }
+                }
+
+                function combine(data) {
+
+                        var total = 0,
+                                combined = 0,
+                                numCombined = 0,
+                                color = options.series.pie.combine.color,
+                                newdata = [];
+
+                        // Fix up the raw data from Flot, ensuring the data is numeric
+
+                        for (var i = 0; i < data.length; ++i) {
+
+                                var value = data[i].data;
+
+                                // If the data is an array, we'll assume that it's a standard
+                                // Flot x-y pair, and are concerned only with the second value.
+
+                                // Note how we use the original array, rather than creating a
+                                // new one; this is more efficient and preserves any extra data
+                                // that the user may have stored in higher indexes.
+
+                                if ($.isArray(value) && value.length == 1) {
+                                value = value[0];
+                                }
+
+                                if ($.isArray(value)) {
+                                        // Equivalent to $.isNumeric() but compatible with jQuery < 1.7
+                                        if (!isNaN(parseFloat(value[1])) && isFinite(value[1])) {
+                                                value[1] = +value[1];
+                                        } else {
+                                                value[1] = 0;
+                                        }
+                                } else if (!isNaN(parseFloat(value)) && isFinite(value)) {
+                                        value = [1, +value];
+                                } else {
+                                        value = [1, 0];
+                                }
+
+                                data[i].data = [value];
+                        }
+
+                        // Sum up all the slices, so we can calculate percentages for each
+
+                        for (var i = 0; i < data.length; ++i) {
+                                total += data[i].data[0][1];
+                        }
+
+                        // Count the number of slices with percentages below the combine
+                        // threshold; if it turns out to be just one, we won't combine.
+
+                        for (var i = 0; i < data.length; ++i) {
+                                var value = data[i].data[0][1];
+                                if (value / total <= options.series.pie.combine.threshold) {
+                                        combined += value;
+                                        numCombined++;
+                                        if (!color) {
+                                                color = data[i].color;
+                                        }
+                                }
+                        }
+
+                        for (var i = 0; i < data.length; ++i) {
+                                var value = data[i].data[0][1];
+                                if (numCombined < 2 || value / total > options.series.pie.combine.threshold) {
+                                        newdata.push(
+                                                $.extend(data[i], {     /* extend to allow keeping all other original data values
+                                                                           and using them e.g. in labelFormatter. */
+                                                        data: [[1, value]],
+                                                        color: data[i].color,
+                                                        label: data[i].label,
+                                                        angle: value * Math.PI * 2 / total,
+                                                        percent: value / (total / 100)
+                                                })
+                                        );
+                                }
+                        }
+
+                        if (numCombined > 1) {
+                                newdata.push({
+                                        data: [[1, combined]],
+                                        color: color,
+                                        label: options.series.pie.combine.label,
+                                        angle: combined * Math.PI * 2 / total,
+                                        percent: combined / (total / 100)
+                                });
+                        }
+
+                        return newdata;
+                }
+
+                function draw(plot, newCtx) {
+
+                        if (!target) {
+                                return; // if no series were passed
+                        }
+
+                        var canvasWidth = plot.getPlaceholder().width(),
+                                canvasHeight = plot.getPlaceholder().height(),
+                                legendWidth = target.children().filter(".legend").children().width() || 0;
+
+                        ctx = newCtx;
+
+                        // WARNING: HACK! REWRITE THIS CODE AS SOON AS POSSIBLE!
+
+                        // When combining smaller slices into an 'other' slice, we need to
+                        // add a new series.  Since Flot gives plugins no way to modify the
+                        // list of series, the pie plugin uses a hack where the first call
+                        // to processDatapoints results in a call to setData with the new
+                        // list of series, then subsequent processDatapoints do nothing.
+
+                        // The plugin-global 'processed' flag is used to control this hack;
+                        // it starts out false, and is set to true after the first call to
+                        // processDatapoints.
+
+                        // Unfortunately this turns future setData calls into no-ops; they
+                        // call processDatapoints, the flag is true, and nothing happens.
+
+                        // To fix this we'll set the flag back to false here in draw, when
+                        // all series have been processed, so the next sequence of calls to
+                        // processDatapoints once again starts out with a slice-combine.
+                        // This is really a hack; in 0.9 we need to give plugins a proper
+                        // way to modify series before any processing begins.
+
+                        processed = false;
+
+                        // calculate maximum radius and center point
+
+                        maxRadius =  Math.min(canvasWidth, canvasHeight / options.series.pie.tilt) / 2;
+                        centerTop = canvasHeight / 2 + options.series.pie.offset.top;
+                        centerLeft = canvasWidth / 2;
+
+                        if (options.series.pie.offset.left == "auto") {
+                                if (options.legend.position.match("w")) {
+                                        centerLeft += legendWidth / 2;
+                                } else {
+                                        centerLeft -= legendWidth / 2;
+                                }
+                                if (centerLeft < maxRadius) {
+                                        centerLeft = maxRadius;
+                                } else if (centerLeft > canvasWidth - maxRadius) {
+                                        centerLeft = canvasWidth - maxRadius;
+                                }
+                        } else {
+                                centerLeft += options.series.pie.offset.left;
+                        }
+
+                        var slices = plot.getData(),
+                                attempts = 0;
+
+                        // Keep shrinking the pie's radius until drawPie returns true,
+                        // indicating that all the labels fit, or we try too many times.
+
+                        do {
+                                if (attempts > 0) {
+                                        maxRadius *= REDRAW_SHRINK;
+                                }
+                                attempts += 1;
+                                clear();
+                                if (options.series.pie.tilt <= 0.8) {
+                                        drawShadow();
+                                }
+                        } while (!drawPie() && attempts < REDRAW_ATTEMPTS)
+
+                        if (attempts >= REDRAW_ATTEMPTS) {
+                                clear();
+                                target.prepend("<div class='error'>Could not draw pie with labels contained inside canvas</div>");
+                        }
+
+                        if (plot.setSeries && plot.insertLegend) {
+                                plot.setSeries(slices);
+                                plot.insertLegend();
+                        }
+
+                        // we're actually done at this point, just defining internal functions at this point
+
+                        function clear() {
+                                ctx.clearRect(0, 0, canvasWidth, canvasHeight);
+                                target.children().filter(".pieLabel, .pieLabelBackground").remove();
+                        }
+
+                        function drawShadow() {
+
+                                var shadowLeft = options.series.pie.shadow.left;
+                                var shadowTop = options.series.pie.shadow.top;
+                                var edge = 10;
+                                var alpha = options.series.pie.shadow.alpha;
+                                var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
+
+                                if (radius >= canvasWidth / 2 - shadowLeft || radius * options.series.pie.tilt >= canvasHeight / 2 - shadowTop || radius <= edge) {
+                                        return; // shadow would be outside canvas, so don't draw it
+                                }
+
+                                ctx.save();
+                                ctx.translate(shadowLeft,shadowTop);
+                                ctx.globalAlpha = alpha;
+                                ctx.fillStyle = "#000";
+
+                                // center and rotate to starting position
+
+                                ctx.translate(centerLeft,centerTop);
+                                ctx.scale(1, options.series.pie.tilt);
+
+                                //radius -= edge;
+
+                                for (var i = 1; i <= edge; i++) {
+                                        ctx.beginPath();
+                                        ctx.arc(0, 0, radius, 0, Math.PI * 2, false);
+                                        ctx.fill();
+                                        radius -= i;
+                                }
+
+                                ctx.restore();
+                        }
+
+                        function drawPie() {
+
+                                var startAngle = Math.PI * options.series.pie.startAngle;
+                                var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
+
+                                // center and rotate to starting position
+
+                                ctx.save();
+                                ctx.translate(centerLeft,centerTop);
+                                ctx.scale(1, options.series.pie.tilt);
+                                //ctx.rotate(startAngle); // start at top; -- This doesn't work properly in Opera
+
+                                // draw slices
+
+                                ctx.save();
+                                var currentAngle = startAngle;
+                                for (var i = 0; i < slices.length; ++i) {
+                                        slices[i].startAngle = currentAngle;
+                                        drawSlice(slices[i].angle, slices[i].color, true);
+                                }
+                                ctx.restore();
+
+                                // draw slice outlines
+
+                                if (options.series.pie.stroke.width > 0) {
+                                        ctx.save();
+                                        ctx.lineWidth = options.series.pie.stroke.width;
+                                        currentAngle = startAngle;
+                                        for (var i = 0; i < slices.length; ++i) {
+                                                drawSlice(slices[i].angle, options.series.pie.stroke.color, false);
+                                        }
+                                        ctx.restore();
+                                }
+
+                                // draw donut hole
+
+                                drawDonutHole(ctx);
+
+                                ctx.restore();
+
+                                // Draw the labels, returning true if they fit within the plot
+
+                                if (options.series.pie.label.show) {
+                                        return drawLabels();
+                                } else return true;
+
+                                function drawSlice(angle, color, fill) {
+
+                                        if (angle <= 0 || isNaN(angle)) {
+                                                return;
+                                        }
+
+                                        if (fill) {
+                                                ctx.fillStyle = color;
+                                        } else {
+                                                ctx.strokeStyle = color;
+                                                ctx.lineJoin = "round";
+                                        }
+
+                                        ctx.beginPath();
+                                        if (Math.abs(angle - Math.PI * 2) > 0.000000001) {
+                                                ctx.moveTo(0, 0); // Center of the pie
+                                        }
+
+                                        //ctx.arc(0, 0, radius, 0, angle, false); // This doesn't work properly in Opera
+                                        ctx.arc(0, 0, radius,currentAngle, currentAngle + angle / 2, false);
+                                        ctx.arc(0, 0, radius,currentAngle + angle / 2, currentAngle + angle, false);
+                                        ctx.closePath();
+                                        //ctx.rotate(angle); // This doesn't work properly in Opera
+                                        currentAngle += angle;
+
+                                        if (fill) {
+                                                ctx.fill();
+                                        } else {
+                                                ctx.stroke();
+                                        }
+                                }
+
+                                function drawLabels() {
+
+                                        var currentAngle = startAngle;
+                                        var radius = options.series.pie.label.radius > 1 ? options.series.pie.label.radius : maxRadius * options.series.pie.label.radius;
+
+                                        for (var i = 0; i < slices.length; ++i) {
+                                                if (slices[i].percent >= options.series.pie.label.threshold * 100) {
+                                                        if (!drawLabel(slices[i], currentAngle, i)) {
+                                                                return false;
+                                                        }
+                                                }
+                                                currentAngle += slices[i].angle;
+                                        }
+
+                                        return true;
+
+                                        function drawLabel(slice, startAngle, index) {
+
+                                                if (slice.data[0][1] == 0) {
+                                                        return true;
+                                                }
+
+                                                // format label text
+
+                                                var lf = options.legend.labelFormatter, text, plf = options.series.pie.label.formatter;
+
+                                                if (lf) {
+                                                        text = lf(slice.label, slice);
+                                                } else {
+                                                        text = slice.label;
+                                                }
+
+                                                if (plf) {
+                                                        text = plf(text, slice);
+                                                }
+
+                                                var halfAngle = ((startAngle + slice.angle) + startAngle) / 2;
+                                                var x = centerLeft + Math.round(Math.cos(halfAngle) * radius);
+                                                var y = centerTop + Math.round(Math.sin(halfAngle) * radius) * options.series.pie.tilt;
+
+                                                var html = "<span class='pieLabel' id='pieLabel" + index + "' style='position:absolute;top:" + y + "px;left:" + x + "px;'>" + text + "</span>";
+                                                target.append(html);
+
+                                                var label = target.children("#pieLabel" + index);
+                                                var labelTop = (y - label.height() / 2);
+                                                var labelLeft = (x - label.width() / 2);
+
+                                                label.css("top", labelTop);
+                                                label.css("left", labelLeft);
+
+                                                // check to make sure that the label is not outside the canvas
+
+                                                if (0 - labelTop > 0 || 0 - labelLeft > 0 || canvasHeight - (labelTop + label.height()) < 0 || canvasWidth - (labelLeft + label.width()) < 0) {
+                                                        return false;
+                                                }
+
+                                                if (options.series.pie.label.background.opacity != 0) {
+
+                                                        // put in the transparent background separately to avoid blended labels and label boxes
+
+                                                        var c = options.series.pie.label.background.color;
+
+                                                        if (c == null) {
+                                                                c = slice.color;
+                                                        }
+
+                                                        var pos = "top:" + labelTop + "px;left:" + labelLeft + "px;";
+                                                        $("<div class='pieLabelBackground' style='position:absolute;width:" + label.width() + "px;height:" + label.height() + "px;" + pos + "background-color:" + c + ";'></div>")
+                                                                .css("opacity", options.series.pie.label.background.opacity)
+                                                                .insertBefore(label);
+                                                }
+
+                                                return true;
+                                        } // end individual label function
+                                } // end drawLabels function
+                        } // end drawPie function
+                } // end draw function
+
+                // Placed here because it needs to be accessed from multiple locations
+
+                function drawDonutHole(layer) {
+                        if (options.series.pie.innerRadius > 0) {
+
+                                // subtract the center
+
+                                layer.save();
+                                var innerRadius = options.series.pie.innerRadius > 1 ? options.series.pie.innerRadius : maxRadius * options.series.pie.innerRadius;
+                                layer.globalCompositeOperation = "destination-out"; // this does not work with excanvas, but it will fall back to using the stroke color
+                                layer.beginPath();
+                                layer.fillStyle = options.series.pie.stroke.color;
+                                layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
+                                layer.fill();
+                                layer.closePath();
+                                layer.restore();
+
+                                // add inner stroke
+
+                                layer.save();
+                                layer.beginPath();
+                                layer.strokeStyle = options.series.pie.stroke.color;
+                                layer.arc(0, 0, innerRadius, 0, Math.PI * 2, false);
+                                layer.stroke();
+                                layer.closePath();
+                                layer.restore();
+
+                                // TODO: add extra shadow inside hole (with a mask) if the pie is tilted.
+                        }
+                }
+
+                //-- Additional Interactive related functions --
+
+                function isPointInPoly(poly, pt) {
+                        for(var c = false, i = -1, l = poly.length, j = l - 1; ++i < l; j = i)
+                                ((poly[i][1] <= pt[1] && pt[1] < poly[j][1]) || (poly[j][1] <= pt[1] && pt[1]< poly[i][1]))
+                                && (pt[0] < (poly[j][0] - poly[i][0]) * (pt[1] - poly[i][1]) / (poly[j][1] - poly[i][1]) + poly[i][0])
+                                && (c = !c);
+                        return c;
+                }
+
+                function findNearbySlice(mouseX, mouseY) {
+
+                        var slices = plot.getData(),
+                                options = plot.getOptions(),
+                                radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius,
+                                x, y;
+
+                        for (var i = 0; i < slices.length; ++i) {
+
+                                var s = slices[i];
+
+                                if (s.pie.show) {
+
+                                        ctx.save();
+                                        ctx.beginPath();
+                                        ctx.moveTo(0, 0); // Center of the pie
+                                        //ctx.scale(1, options.series.pie.tilt);        // this actually seems to break everything when here.
+                                        ctx.arc(0, 0, radius, s.startAngle, s.startAngle + s.angle / 2, false);
+                                        ctx.arc(0, 0, radius, s.startAngle + s.angle / 2, s.startAngle + s.angle, false);
+                                        ctx.closePath();
+                                        x = mouseX - centerLeft;
+                                        y = mouseY - centerTop;
+
+                                        if (ctx.isPointInPath) {
+                                                if (ctx.isPointInPath(mouseX - centerLeft, mouseY - centerTop)) {
+                                                        ctx.restore();
+                                                        return {
+                                                                datapoint: [s.percent, s.data],
+                                                                dataIndex: 0,
+                                                                series: s,
+                                                                seriesIndex: i
+                                                        };
+                                                }
+                                        } else {
+
+                                                // excanvas for IE doesn;t support isPointInPath, this is a workaround.
+
+                                                var p1X = radius * Math.cos(s.startAngle),
+                                                        p1Y = radius * Math.sin(s.startAngle),
+                                                        p2X = radius * Math.cos(s.startAngle + s.angle / 4),
+                                                        p2Y = radius * Math.sin(s.startAngle + s.angle / 4),
+                                                        p3X = radius * Math.cos(s.startAngle + s.angle / 2),
+                                                        p3Y = radius * Math.sin(s.startAngle + s.angle / 2),
+                                                        p4X = radius * Math.cos(s.startAngle + s.angle / 1.5),
+                                                        p4Y = radius * Math.sin(s.startAngle + s.angle / 1.5),
+                                                        p5X = radius * Math.cos(s.startAngle + s.angle),
+                                                        p5Y = radius * Math.sin(s.startAngle + s.angle),
+                                                        arrPoly = [[0, 0], [p1X, p1Y], [p2X, p2Y], [p3X, p3Y], [p4X, p4Y], [p5X, p5Y]],
+                                                        arrPoint = [x, y];
+
+                                                // TODO: perhaps do some mathmatical trickery here with the Y-coordinate to compensate for pie tilt?
+
+                                                if (isPointInPoly(arrPoly, arrPoint)) {
+                                                        ctx.restore();
+                                                        return {
+                                                                datapoint: [s.percent, s.data],
+                                                                dataIndex: 0,
+                                                                series: s,
+                                                                seriesIndex: i
+                                                        };
+                                                }
+                                        }
+
+                                        ctx.restore();
+                                }
+                        }
+
+                        return null;
+                }
+
+                function onMouseMove(e) {
+                        triggerClickHoverEvent("plothover", e);
+                }
+
+                function onClick(e) {
+                        triggerClickHoverEvent("plotclick", e);
+                }
+
+                // trigger click or hover event (they send the same parameters so we share their code)
+
+                function triggerClickHoverEvent(eventname, e) {
+
+                        var offset = plot.offset();
+                        var canvasX = parseInt(e.pageX - offset.left);
+                        var canvasY =  parseInt(e.pageY - offset.top);
+                        var item = findNearbySlice(canvasX, canvasY);
+
+                        if (options.grid.autoHighlight) {
+
+                                // clear auto-highlights
+
+                                for (var i = 0; i < highlights.length; ++i) {
+                                        var h = highlights[i];
+                                        if (h.auto == eventname && !(item && h.series == item.series)) {
+                                                unhighlight(h.series);
+                                        }
+                                }
+                        }
+
+                        // highlight the slice
+
+                        if (item) {
+                                highlight(item.series, eventname);
+                        }
+
+                        // trigger any hover bind events
+
+                        var pos = { pageX: e.pageX, pageY: e.pageY };
+                        target.trigger(eventname, [pos, item]);
+                }
+
+                function highlight(s, auto) {
+                        //if (typeof s == "number") {
+                        //      s = series[s];
+                        //}
+
+                        var i = indexOfHighlight(s);
+
+                        if (i == -1) {
+                                highlights.push({ series: s, auto: auto });
+                                plot.triggerRedrawOverlay();
+                        } else if (!auto) {
+                                highlights[i].auto = false;
+                        }
+                }
+
+                function unhighlight(s) {
+                        if (s == null) {
+                                highlights = [];
+                                plot.triggerRedrawOverlay();
+                        }
+
+                        //if (typeof s == "number") {
+                        //      s = series[s];
+                        //}
+
+                        var i = indexOfHighlight(s);
+
+                        if (i != -1) {
+                                highlights.splice(i, 1);
+                                plot.triggerRedrawOverlay();
+                        }
+                }
+
+                function indexOfHighlight(s) {
+                        for (var i = 0; i < highlights.length; ++i) {
+                                var h = highlights[i];
+                                if (h.series == s)
+                                        return i;
+                        }
+                        return -1;
+                }
+
+                function drawOverlay(plot, octx) {
+
+                        var options = plot.getOptions();
+
+                        var radius = options.series.pie.radius > 1 ? options.series.pie.radius : maxRadius * options.series.pie.radius;
+
+                        octx.save();
+                        octx.translate(centerLeft, centerTop);
+                        octx.scale(1, options.series.pie.tilt);
+
+                        for (var i = 0; i < highlights.length; ++i) {
+                                drawHighlight(highlights[i].series);
+                        }
+
+                        drawDonutHole(octx);
+
+                        octx.restore();
+
+                        function drawHighlight(series) {
+
+                                if (series.angle <= 0 || isNaN(series.angle)) {
+                                        return;
+                                }
+
+                                //octx.fillStyle = parseColor(options.series.pie.highlight.color).scale(null, null, null, options.series.pie.highlight.opacity).toString();
+                                octx.fillStyle = "rgba(255, 255, 255, " + options.series.pie.highlight.opacity + ")"; // this is temporary until we have access to parseColor
+                                octx.beginPath();
+                                if (Math.abs(series.angle - Math.PI * 2) > 0.000000001) {
+                                        octx.moveTo(0, 0); // Center of the pie
+                                }
+                                octx.arc(0, 0, radius, series.startAngle, series.startAngle + series.angle / 2, false);
+                                octx.arc(0, 0, radius, series.startAngle + series.angle / 2, series.startAngle + series.angle, false);
+                                octx.closePath();
+                                octx.fill();
+                        }
+                }
+        } // end init (plugin body)
+
+        // define pie specific options and their default values
+
+        var options = {
+                series: {
+                        pie: {
+                                show: false,
+                                radius: "auto", // actual radius of the visible pie (based on full calculated radius if <=1, or hard pixel value)
+                                innerRadius: 0, /* for donut */
+                                startAngle: 3/2,
+                                tilt: 1,
+                                shadow: {
+                                        left: 5,        // shadow left offset
+                                        top: 15,        // shadow top offset
+                                        alpha: 0.02     // shadow alpha
+                                },
+                                offset: {
+                                        top: 0,
+                                        left: "auto"
+                                },
+                                stroke: {
+                                        color: "#fff",
+                                        width: 1
+                                },
+                                label: {
+                                        show: "auto",
+                                        formatter: function(label, slice) {
+                                                return "<div style='font-size:x-small;text-align:center;padding:2px;color:" + slice.color + ";'>" + label + "<br/>" + Math.round(slice.percent) + "%</div>";
+                                        },      // formatter function
+                                        radius: 1,      // radius at which to place the labels (based on full calculated radius if <=1, or hard pixel value)
+                                        background: {
+                                                color: null,
+                                                opacity: 0
+                                        },
+                                        threshold: 0    // percentage at which to hide the label (i.e. the slice is too narrow)
+                                },
+                                combine: {
+                                        threshold: -1,  // percentage at which to combine little slices into one larger slice
+                                        color: null,    // color to give the new slice (auto-generated if null)
+                                        label: "Other"  // label to give the new slice
+                                },
+                                highlight: {
+                                        //color: "#fff",                // will add this functionality once parseColor is available
+                                        opacity: 0.5
+                                }
+                        }
+                }
+        };
+
+        $.plot.plugins.push({
+                init: init,
+                options: options,
+                name: "pie",
+                version: "1.1"
+        });
+
+})(jQuery);