+++ /dev/null
-/* Flot plugin for rendering pie charts.
-
-Copyright (c) 2007-2013 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({
- 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);
Code Review / stor4nfv.git / blobdiff