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/*
* --------------------------------------------------------------------
* jQuery inputToButton plugin
* Author: Scott Jehl, scott@filamentgroup.com
* Copyright (c) 2009 Filament Group
* licensed under MIT (filamentgroup.com/examples/mit-license.txt)
* --------------------------------------------------------------------
*/
(function($) {
$.fn.visualize = function(options, container){
return $(this).each(function(){
//configuration
var o = $.extend({
type: 'bar', //also available: area, pie, line
width: $(this).width(), //height of canvas - defaults to table height
height: $(this).height(), //height of canvas - defaults to table height
appendTitle: true, //table caption text is added to chart
title: null, //grabs from table caption if null
appendKey: true, //color key is added to chart
rowFilter: ' ',
colFilter: ' ',
colors: ['#be1e2d','#666699','#92d5ea','#ee8310','#8d10ee','#5a3b16','#26a4ed','#f45a90','#e9e744'],
textColors: [], //corresponds with colors array. null/undefined items will fall back to CSS
parseDirection: 'x', //which direction to parse the table data
pieMargin: 20, //pie charts only - spacing around pie
pieLabelsAsPercent: true,
pieLabelPos: 'inside',
lineWeight: 4, //for line and area - stroke weight
barGroupMargin: 10,
barMargin: 1, //space around bars in bar chart (added to both sides of bar)
yLabelInterval: 30 //distance between y labels
},options);
//reset width, height to numbers
o.width = parseFloat(o.width);
o.height = parseFloat(o.height);
var self = $(this);
//function to scrape data from html table
function scrapeTable(){
var colors = o.colors;
var textColors = o.textColors;
var tableData = {
dataGroups: function(){
var dataGroups = [];
if(o.parseDirection == 'x'){
self.find('tr:gt(0)').filter(o.rowFilter).each(function(i){
dataGroups[i] = {};
dataGroups[i].points = [];
dataGroups[i].color = colors[i];
if(textColors[i]){ dataGroups[i].textColor = textColors[i]; }
$(this).find('td').filter(o.colFilter).each(function(){
dataGroups[i].points.push( parseFloat($(this).text()) );
});
});
}
else {
var cols = self.find('tr:eq(1) td').filter(o.colFilter).size();
for(var i=0; i<cols; i++){
dataGroups[i] = {};
dataGroups[i].points = [];
dataGroups[i].color = colors[i];
if(textColors[i]){ dataGroups[i].textColor = textColors[i]; }
self.find('tr:gt(0)').filter(o.rowFilter).each(function(){
dataGroups[i].points.push( $(this).find('td').filter(o.colFilter).eq(i).text()*1 );
});
};
}
return dataGroups;
},
allData: function(){
var allData = [];
$(this.dataGroups()).each(function(){
allData.push(this.points);
});
return allData;
},
dataSum: function(){
var dataSum = 0;
var allData = this.allData().join(',').split(',');
$(allData).each(function(){
dataSum += parseFloat(this);
});
return dataSum
},
topValue: function(){
var topValue = 0;
var allData = this.allData().join(',').split(',');
$(allData).each(function(){
if(parseFloat(this,10)>topValue) topValue = parseFloat(this);
});
return topValue;
},
bottomValue: function(){
var bottomValue = 0;
var allData = this.allData().join(',').split(',');
$(allData).each(function(){
if(this<bottomValue) bottomValue = parseFloat(this);
});
return bottomValue;
},
memberTotals: function(){
var memberTotals = [];
var dataGroups = this.dataGroups();
$(dataGroups).each(function(l){
var count = 0;
$(dataGroups[l].points).each(function(m){
count +=dataGroups[l].points[m];
});
memberTotals.push(count);
});
return memberTotals;
},
yTotals: function(){
var yTotals = [];
var dataGroups = this.dataGroups();
var loopLength = this.xLabels().length;
for(var i = 0; i<loopLength; i++){
yTotals[i] =[];
var thisTotal = 0;
$(dataGroups).each(function(l){
yTotals[i].push(this.points[i]);
});
yTotals[i].join(',').split(',');
$(yTotals[i]).each(function(){
thisTotal += parseFloat(this);
});
yTotals[i] = thisTotal;
}
return yTotals;
},
topYtotal: function(){
var topYtotal = 0;
var yTotals = this.yTotals().join(',').split(',');
$(yTotals).each(function(){
if(parseFloat(this,10)>topYtotal) topYtotal = parseFloat(this);
});
return topYtotal;
},
totalYRange: function(){
return this.topValue() - this.bottomValue();
},
xLabels: function(){
var xLabels = [];
if(o.parseDirection == 'x'){
self.find('tr:eq(0) th').filter(o.colFilter).each(function(){
xLabels.push($(this).html());
});
}
else {
self.find('tr:gt(0) th').filter(o.rowFilter).each(function(){
xLabels.push($(this).html());
});
}
return xLabels;
},
yLabels: function(){
var yLabels = [];
yLabels.push(bottomValue);
var numLabels = Math.round(o.height / o.yLabelInterval);
var loopInterval = Math.ceil(totalYRange / numLabels) || 1;
while( yLabels[yLabels.length-1] < topValue - loopInterval){
yLabels.push(yLabels[yLabels.length-1] + loopInterval);
}
yLabels.push(topValue);
return yLabels;
}
};
return tableData;
};
//function to create a chart
var createChart = {
pie: function(){
canvasContain.addClass('visualize-pie');
if(o.pieLabelPos == 'outside'){ canvasContain.addClass('visualize-pie-outside'); }
var centerx = Math.round(canvas.width()/2);
var centery = Math.round(canvas.height()/2);
var radius = centery - o.pieMargin;
var counter = 0.0;
var toRad = function(integer){ return (Math.PI/180)*integer; };
var labels = $('<ul class="visualize-labels"></ul>')
.insertAfter(canvas);
//draw the pie pieces
$.each(memberTotals, function(i){
var fraction = (this <= 0 || isNaN(this))? 0 : this / dataSum;
ctx.beginPath();
ctx.moveTo(centerx, centery);
ctx.arc(centerx, centery, radius,
counter * Math.PI * 2 - Math.PI * 0.5,
(counter + fraction) * Math.PI * 2 - Math.PI * 0.5,
false);
ctx.lineTo(centerx, centery);
ctx.closePath();
ctx.fillStyle = dataGroups[i].color;
ctx.fill();
// draw labels
var sliceMiddle = (counter + fraction/2);
var distance = o.pieLabelPos == 'inside' ? radius/1.5 : radius + radius / 5;
var labelx = Math.round(centerx + Math.sin(sliceMiddle * Math.PI * 2) * (distance));
var labely = Math.round(centery - Math.cos(sliceMiddle * Math.PI * 2) * (distance));
var leftRight = (labelx > centerx) ? 'right' : 'left';
var topBottom = (labely > centery) ? 'bottom' : 'top';
var percentage = parseFloat((fraction*100).toFixed(2));
if(percentage){
var labelval = (o.pieLabelsAsPercent) ? percentage + '%' : this;
var labeltext = $('<span class="visualize-label">' + labelval +'</span>')
.css(leftRight, 0)
.css(topBottom, 0);
if(labeltext)
var label = $('<li class="visualize-label-pos"></li>')
.appendTo(labels)
.css({left: labelx, top: labely})
.append(labeltext);
labeltext
.css('font-size', radius / 8)
.css('margin-'+leftRight, -labeltext.width()/2)
.css('margin-'+topBottom, -labeltext.outerHeight()/2);
if(dataGroups[i].textColor){ labeltext.css('color', dataGroups[i].textColor); }
}
counter+=fraction;
});
},
line: function(area){
if(area){ canvasContain.addClass('visualize-area'); }
else{ canvasContain.addClass('visualize-line'); }
//write X labels
var xInterval = canvas.width() / (xLabels.length -1);
var xlabelsUL = $('<ul class="visualize-labels-x"></ul>')
.width(canvas.width())
.height(canvas.height())
.insertBefore(canvas);
$.each(xLabels, function(i){
var thisLi = $('<li><span>'+this+'</span></li>')
.prepend('<span class="line" />')
.css('left', xInterval * i)
.appendTo(xlabelsUL);
var label = thisLi.find('span:not(.line)');
var leftOffset = label.width()/-2;
if(i == 0){ leftOffset = 0; }
else if(i== xLabels.length-1){ leftOffset = -label.width(); }
label
.css('margin-left', leftOffset)
.addClass('label');
});
//write Y labels
var yScale = canvas.height() / totalYRange;
var liBottom = canvas.height() / (yLabels.length-1);
var ylabelsUL = $('<ul class="visualize-labels-y"></ul>')
.width(canvas.width())
.height(canvas.height())
.insertBefore(canvas);
$.each(yLabels, function(i){
var thisLi = $('<li><span>'+this+'</span></li>')
.prepend('<span class="line" />')
.css('bottom',liBottom*i)
.prependTo(ylabelsUL);
var label = thisLi.find('span:not(.line)');
var topOffset = label.height()/-2;
if(i == 0){ topOffset = -label.height(); }
else if(i== yLabels.length-1){ topOffset = 0; }
label
.css('margin-top', topOffset)
.addClass('label');
});
//start from the bottom left
ctx.translate(0,zeroLoc);
//iterate and draw
$.each(dataGroups,function(h){
ctx.beginPath();
ctx.lineWidth = o.lineWeight;
ctx.lineJoin = 'round';
var points = this.points;
var integer = 0;
ctx.moveTo(0,-(points[0]*yScale));
$.each(points, function(){
ctx.lineTo(integer,-(this*yScale));
integer+=xInterval;
});
ctx.strokeStyle = this.color;
ctx.stroke();
if(area){
ctx.lineTo(integer,0);
ctx.lineTo(0,0);
ctx.closePath();
ctx.fillStyle = this.color;
ctx.globalAlpha = .3;
ctx.fill();
ctx.globalAlpha = 1.0;
}
else {ctx.closePath();}
});
},
area: function(){
createChart.line(true);
},
bar: function(){
canvasContain.addClass('visualize-bar');
//write X labels
var xInterval = canvas.width() / (xLabels.length);
var xlabelsUL = $('<ul class="visualize-labels-x"></ul>')
.width(canvas.width())
.height(canvas.height())
.insertBefore(canvas);
$.each(xLabels, function(i){
var thisLi = $('<li><span class="label">'+this+'</span></li>')
.prepend('<span class="line" />')
.css('left', xInterval * i)
.width(xInterval)
.appendTo(xlabelsUL);
var label = thisLi.find('span.label');
label.addClass('label');
});
//write Y labels
var yScale = canvas.height() / totalYRange;
var liBottom = canvas.height() / (yLabels.length-1);
var ylabelsUL = $('<ul class="visualize-labels-y"></ul>')
.width(canvas.width())
.height(canvas.height())
.insertBefore(canvas);
$.each(yLabels, function(i){
var thisLi = $('<li><span>'+this+'</span></li>')
.prepend('<span class="line" />')
.css('bottom',liBottom*i)
.prependTo(ylabelsUL);
var label = thisLi.find('span:not(.line)');
var topOffset = label.height()/-2;
if(i == 0){ topOffset = -label.height(); }
else if(i== yLabels.length-1){ topOffset = 0; }
label
.css('margin-top', topOffset)
.addClass('label');
});
//start from the bottom left
ctx.translate(0,zeroLoc);
//iterate and draw
for(var h=0; h<dataGroups.length; h++){
ctx.beginPath();
var linewidth = (xInterval-o.barGroupMargin*2) / dataGroups.length; //removed +1
var strokeWidth = linewidth - (o.barMargin*2);
ctx.lineWidth = strokeWidth;
var points = dataGroups[h].points;
var integer = 0;
for(var i=0; i<points.length; i++){
var xVal = (integer-o.barGroupMargin)+(h*linewidth)+linewidth/2;
xVal += o.barGroupMargin*2;
ctx.moveTo(xVal, 0);
ctx.lineTo(xVal, Math.round(-points[i]*yScale));
integer+=xInterval;
}
ctx.strokeStyle = dataGroups[h].color;
ctx.stroke();
ctx.closePath();
}
}
};
//create new canvas, set w&h attrs (not inline styles)
var canvasNode = document.createElement("canvas");
canvasNode.setAttribute('height',o.height);
canvasNode.setAttribute('width',o.width);
var canvas = $(canvasNode);
//get title for chart
var title = o.title || self.find('caption').text();
//create canvas wrapper div, set inline w&h, append
var canvasContain = (container || $('<div class="visualize" role="img" aria-label="Chart representing data from the table: '+ title +'" />'))
.height(o.height)
.width(o.width)
.append(canvas);
//scrape table (this should be cleaned up into an obj)
var tableData = scrapeTable();
var dataGroups = tableData.dataGroups();
var allData = tableData.allData();
var dataSum = tableData.dataSum();
var topValue = tableData.topValue();
var bottomValue = tableData.bottomValue();
var memberTotals = tableData.memberTotals();
var totalYRange = tableData.totalYRange();
var zeroLoc = o.height * (topValue/totalYRange);
var xLabels = tableData.xLabels();
var yLabels = tableData.yLabels();
//title/key container
if(o.appendTitle || o.appendKey){
var infoContain = $('<div class="visualize-info"></div>')
.appendTo(canvasContain);
}
//append title
if(o.appendTitle){
$('<div class="visualize-title">'+ title +'</div>').appendTo(infoContain);
}
//append key
if(o.appendKey){
var newKey = $('<ul class="visualize-key"></ul>');
var selector;
if(o.parseDirection == 'x'){
selector = self.find('tr:gt(0) th').filter(o.rowFilter);
}
else{
selector = self.find('tr:eq(0) th').filter(o.colFilter);
}
selector.each(function(i){
$('<li><span class="visualize-key-color" style="background: '+dataGroups[i].color+'"></span><span class="visualize-key-label">'+ $(this).text() +'</span></li>')
.appendTo(newKey);
});
newKey.appendTo(infoContain);
};
//append new canvas to page
if(!container){canvasContain.insertAfter(this); }
if( typeof(G_vmlCanvasManager) != 'undefined' ){ G_vmlCanvasManager.init(); G_vmlCanvasManager.initElement(canvas[0]); }
//set up the drawing board
var ctx = canvas[0].getContext('2d');
//create chart
createChart[o.type]();
//clean up some doubled lines that sit on top of canvas borders (done via JS due to IE)
$('.visualize-line li:first-child span.line, .visualize-line li:last-child span.line, .visualize-area li:first-child span.line, .visualize-area li:last-child span.line, .visualize-bar li:first-child span.line,.visualize-bar .visualize-labels-y li:last-child span.line').css('border','none');
if(!container){
//add event for updating
canvasContain.bind('visualizeRefresh', function(){
self.visualize(o, $(this).empty());
});
}
}).next(); //returns canvas(es)
};
})(jQuery);