| /* 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); |