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-/*
-Flot plugin for rendering pie charts. The plugin assumes the data is
-coming is as a single data value for each series, and each of those
-values is a positive value or zero (negative numbers don't make
-any sense and will cause strange effects). The data values do
-NOT need to be passed in as percentage values because it
-internally calculates the total and percentages.
-
-* Created by Brian Medendorp, June 2009
-* Updated November 2009 with contributions from: btburnett3, Anthony Aragues and Xavi Ivars
-
-* Changes:
- 2009-10-22: lineJoin set to round
- 2009-10-23: IE full circle fix, donut
- 2009-11-11: Added basic hover from btburnett3 - does not work in IE, and center is off in Chrome and Opera
- 2009-11-17: Added IE hover capability submitted by Anthony Aragues
- 2009-11-18: Added bug fix submitted by Xavi Ivars (issues with arrays when other JS libraries are included as well)
-
-
-Available options are:
-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 ($)
-{
- function init(plot) // this is the "body" of the plugin
- {
- var canvas = null;
- var target = null;
- var maxRadius = null;
- var centerLeft = null;
- var centerTop = null;
- var total = 0;
- var redraw = true;
- var redrawAttempts = 10;
- var shrink = 0.95;
- var legendWidth = 0;
- var processed = false;
- var raw = false;
-
- // interactive variables
- var highlights = [];
-
- // add hook to determine if pie plugin in enabled, and then perform necessary operations
- plot.hooks.processOptions.push(checkPieEnabled);
- plot.hooks.bindEvents.push(bindEvents);
-
- // check to see if the pie plugin is enabled
- function checkPieEnabled(plot, options)
- {
- if (options.series.pie.show)
- {
- //disable grid
- 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;
- if (options.series.pie.tilt<0)
- options.series.pie.tilt=0;
-
- // add processData hook to do transformations on the data
- plot.hooks.processDatapoints.push(processDatapoints);
- plot.hooks.drawOverlay.push(drawOverlay);
-
- // add draw hook
- plot.hooks.draw.push(draw);
- }
- }
-
- // bind hoverable events
- function bindEvents(plot, eventHolder)
- {
- var options = plot.getOptions();
-
- if (options.series.pie.show && options.grid.hoverable)
- eventHolder.unbind('mousemove').mousemove(onMouseMove);
-
- if (options.series.pie.show && options.grid.clickable)
- eventHolder.unbind('click').click(onClick);
- }
-
-
- // debugging function that prints out an object
- function alertObject(obj)
- {
- var msg = '';
- function traverse(obj, depth)
- {
- if (!depth)
- depth = 0;
- for (var i = 0; i < obj.length; ++i)
- {
- for (var j=0; j<depth; j++)
- msg += '\t';
-
- if( typeof obj[i] == "object")
- { // its an object
- msg += ''+i+':\n';
- traverse(obj[i], depth+1);
- }
- else
- { // its a value
- msg += ''+i+': '+obj[i]+'\n';
- }
- }
- }
- traverse(obj);
- alert(msg);
- }
-
- function calcTotal(data)
- {
- for (var i = 0; i < data.length; ++i)
- {
- var item = parseFloat(data[i].data[0][1]);
- if (item)
- total += item;
- }
- }
-
- function processDatapoints(plot, series, data, datapoints)
- {
- if (!processed)
- {
- processed = true;
-
- canvas = plot.getCanvas();
- target = $(canvas).parent();
- options = plot.getOptions();
-
- plot.setData(combine(plot.getData()));
- }
- }
-
- function setupPie()
- {
- legendWidth = target.children().filter('.legend').children().width();
-
- // calculate maximum radius and center point
- maxRadius = Math.min(canvas.width,(canvas.height/options.series.pie.tilt))/2;
- centerTop = (canvas.height/2)+options.series.pie.offset.top;
- centerLeft = (canvas.width/2);
-
- if (options.series.pie.offset.left=='auto')
- if (options.legend.position.match('w'))
- centerLeft += legendWidth/2;
- else
- centerLeft -= legendWidth/2;
- else
- centerLeft += options.series.pie.offset.left;
-
- if (centerLeft<maxRadius)
- centerLeft = maxRadius;
- else if (centerLeft>canvas.width-maxRadius)
- centerLeft = canvas.width-maxRadius;
- }
-
- function fixData(data)
- {
- for (var i = 0; i < data.length; ++i)
- {
- if (typeof(data[i].data)=='number')
- data[i].data = [[1,data[i].data]];
- else if (typeof(data[i].data)=='undefined' || typeof(data[i].data[0])=='undefined')
- {
- if (typeof(data[i].data)!='undefined' && typeof(data[i].data.label)!='undefined')
- data[i].label = data[i].data.label; // fix weirdness coming from flot
- data[i].data = [[1,0]];
-
- }
- }
- return data;
- }
-
- function combine(data)
- {
- data = fixData(data);
- calcTotal(data);
- var combined = 0;
- var numCombined = 0;
- var color = options.series.pie.combine.color;
-
- var newdata = [];
- for (var i = 0; i < data.length; ++i)
- {
- // make sure its a number
- data[i].data[0][1] = parseFloat(data[i].data[0][1]);
- if (!data[i].data[0][1])
- data[i].data[0][1] = 0;
-
- if (data[i].data[0][1]/total<=options.series.pie.combine.threshold)
- {
- combined += data[i].data[0][1];
- numCombined++;
- if (!color)
- color = data[i].color;
- }
- else
- {
- newdata.push({
- data: [[1,data[i].data[0][1]]],
- color: data[i].color,
- label: data[i].label,
- angle: (data[i].data[0][1]*(Math.PI*2))/total,
- percent: (data[i].data[0][1]/total*100)
- });
- }
- }
- if (numCombined>0)
- 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
- ctx = newCtx;
-
- setupPie();
- var slices = plot.getData();
-
- var attempts = 0;
- while (redraw && attempts<redrawAttempts)
- {
- redraw = false;
- if (attempts>0)
- maxRadius *= shrink;
- attempts += 1;
- clear();
- if (options.series.pie.tilt<=0.8)
- drawShadow();
- drawPie();
- }
- if (attempts >= redrawAttempts) {
- 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,canvas.width,canvas.height);
- target.children().filter('.pieLabel, .pieLabelBackground').remove();
- }
-
- function drawShadow()
- {
- var shadowLeft = 5;
- var shadowTop = 15;
- var edge = 10;
- var alpha = 0.02;
-
- // set radius
- if (options.series.pie.radius>1)
- var radius = options.series.pie.radius;
- else
- var radius = maxRadius * options.series.pie.radius;
-
- if (radius>=(canvas.width/2)-shadowLeft || radius*options.series.pie.tilt>=(canvas.height/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()
- {
- startAngle = Math.PI*options.series.pie.startAngle;
-
- // set radius
- if (options.series.pie.radius>1)
- var radius = options.series.pie.radius;
- else
- var 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
- 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);
-
- // draw labels
- if (options.series.pie.label.show)
- drawLabels();
-
- // restore to original state
- ctx.restore();
-
- function drawSlice(angle, color, fill)
- {
- if (angle<=0)
- 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
- else if ($.browser.msie)
- angle -= 0.0001;
- //ctx.arc(0,0,radius,0,angle,false); // This doesn't work properly in Opera
- ctx.arc(0,0,radius,currentAngle,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;
-
- // set radius
- if (options.series.pie.label.radius>1)
- var radius = options.series.pie.label.radius;
- else
- var 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)
- drawLabel(slices[i], currentAngle, i);
- currentAngle += slices[i].angle;
- }
-
- function drawLabel(slice, startAngle, index)
- {
- if (slice.data[0][1]==0)
- return;
-
- // 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 || canvas.height-(labelTop+label.height())<0 || canvas.width-(labelLeft+label.width())<0)
- redraw = true;
-
- 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>').insertBefore(label).css('opacity', options.series.pie.label.background.opacity);
- }
- } // 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)
- {
- // draw donut hole
- if(options.series.pie.innerRadius > 0)
- {
- // subtract the center
- layer.save();
- 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;
-
- 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,false);
- ctx.closePath();
- x = mouseX-centerLeft;
- y = mouseY-centerTop;
- if(ctx.isPointInPath)
- {
- if (ctx.isPointInPath(mouseX-centerLeft, mouseY-centerTop))
- {
- //alert('found slice!');
- 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.
- 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(),
- canvasX = parseInt(e.pageX - offset.left),
- canvasY = parseInt(e.pageY - offset.top),
- 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)
- {
- //alert(options.series.pie.radius);
- var options = plot.getOptions();
- //alert(options.series.pie.radius);
-
- 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 (i = 0; i < highlights.length; ++i)
- drawHighlight(highlights[i].series);
-
- drawDonutHole(octx);
-
- octx.restore();
-
- function drawHighlight(series)
- {
- if (series.angle < 0) 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,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,
- 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: "1.0"
- });
-})(jQuery);
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-13 19:58:16 +0000