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QChart.js
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QChart.js
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// QChart.js ---
//
// Author: Julien Wintz
// Created: Thu Feb 13 14:37:26 2014 (+0100)
// Version:
// Last-Updated:
// By:
// Update #: 92
//
// Change Log:
//
//
var ChartType = {
BAR: 1,
DOUGHNUT: 2,
LINE: 3,
PIE: 4,
POLAR: 5,
RADAR: 6
};
var Chart = function(canvas, context) {
var chart = this;
var width = context.canvas.width;
var height = context.canvas.height;
// /////////////////////////////////////////////////////////////////
// Polar area helper
// /////////////////////////////////////////////////////////////////
this.PolarArea = function(data, options) {
chart.PolarArea.defaults = {
scaleOverlay: true,
scaleOverride: false,
scaleSteps: null,
scaleStepWidth: null,
scaleStartValue: null,
scaleShowLine: true,
scaleLineColor: "rgba(0,0,0,.1)",
scaleLineWidth: 1,
scaleShowLabels: true,
scaleLabel: "<%=value%>",
scaleFontFamily: "'Arial'",
scaleFontSize: 12,
scaleFontStyle: "normal",
scaleFontColor: "#666",
scaleShowLabelBackdrop: true,
scaleBackdropColor: "rgba(255,255,255,0.75)",
scaleBackdropPaddingY: 2,
scaleBackdropPaddingX: 2,
segmentShowStroke: true,
segmentStrokeColor: "#fff",
segmentStrokeWidth: 2,
animation: true,
animationSteps: 100,
animationEasing: "easeOutBounce",
animateRotate: true,
animateScale: false,
onAnimationComplete: null
};
var config = (options) ? mergeChartConfig(chart.PolarArea.defaults,options) : chart.PolarArea.defaults;
return new PolarArea(data,config,context);
};
// /////////////////////////////////////////////////////////////////
// Radar helper
// /////////////////////////////////////////////////////////////////
this.Radar = function(data,options) {
chart.Radar.defaults = {
scaleOverlay: false,
scaleOverride: false,
scaleSteps: null,
scaleStepWidth: null,
scaleStartValue: null,
scaleShowLine: true,
scaleLineColor: "rgba(0,0,0,.1)",
scaleLineWidth: 1,
scaleShowLabels: false,
scaleLabel: "<%=value%>",
scaleFontFamily: "'Arial'",
scaleFontSize: 12,
scaleFontStyle: "normal",
scaleFontColor: "#666",
scaleShowLabelBackdrop: true,
scaleBackdropColor: "rgba(255,255,255,0.75)",
scaleBackdropPaddingY: 2,
scaleBackdropPaddingX: 2,
angleShowLineOut: true,
angleLineColor: "rgba(0,0,0,.1)",
angleLineWidth: 1,
pointLabelFontFamily: "'Arial'",
pointLabelFontStyle: "normal",
pointLabelFontSize: 12,
pointLabelFontColor: "#666",
pointDot: true,
pointDotRadius: 3,
pointDotStrokeWidth: 1,
datasetStroke: true,
datasetStrokeWidth: 2,
datasetFill: true,
animation: true,
animationSteps: 60,
animationEasing: "easeOutQuart",
onAnimationComplete: null
};
var config = (options)? mergeChartConfig(chart.Radar.defaults,options) : chart.Radar.defaults;
return new Radar(data,config,context);
};
// /////////////////////////////////////////////////////////////////
// Pie helper
// /////////////////////////////////////////////////////////////////
this.Pie = function(data,options) {
chart.Pie.defaults = {
segmentShowStroke: true,
segmentStrokeColor: "#fff",
segmentStrokeWidth: 2,
animation: true,
animationSteps: 100,
animationEasing: "easeOutBounce",
animateRotate: true,
animateScale: false,
onAnimationComplete: null
};
var config = (options)? mergeChartConfig(chart.Pie.defaults,options) : chart.Pie.defaults;
return new Pie(data,config,context);
};
// /////////////////////////////////////////////////////////////////
// Doughnut helper
// /////////////////////////////////////////////////////////////////
this.Doughnut = function(data,options) {
chart.Doughnut.defaults = {
segmentShowStroke: true,
segmentStrokeColor: "#fff",
segmentStrokeWidth: 2,
percentageInnerCutout: 50,
animation: true,
animationSteps: 100,
animationEasing: "easeOutBounce",
animateRotate: true,
animateScale: false,
onAnimationComplete: null
};
var config = (options)? mergeChartConfig(chart.Doughnut.defaults,options) : chart.Doughnut.defaults;
return new Doughnut(data,config,context);
};
// /////////////////////////////////////////////////////////////////
// Line helper
// /////////////////////////////////////////////////////////////////
this.Line = function(data,options) {
chart.Line.defaults = {
scaleOverlay: false,
scaleOverride: false,
scaleSteps: null,
scaleStepWidth: null,
scaleStartValue: null,
scaleLineColor: "rgba(0,0,0,.1)",
scaleLineWidth: 1,
scaleShowLabels: true,
scaleLabel: "<%=value%>",
scaleFontFamily: "'Arial'",
scaleFontSize: 12,
scaleFontStyle: "normal",
scaleFontColor: "#666",
scaleShowGridLines: true,
scaleGridLineColor: "rgba(0,0,0,.05)",
scaleGridLineWidth: 1,
bezierCurve: true,
pointDot: true,
pointDotRadius: 4,
pointDotStrokeWidth: 2,
datasetStroke: true,
datasetStrokeWidth: 2,
datasetFill: true,
animation: true,
animationSteps: 60,
animationEasing: "easeOutQuart",
onAnimationComplete: null
};
var config = (options) ? mergeChartConfig(chart.Line.defaults,options) : chart.Line.defaults;
return new Line(data,config,context);
}
// /////////////////////////////////////////////////////////////////
// Bar helper
// /////////////////////////////////////////////////////////////////
this.Bar = function(data,options) {
chart.Bar.defaults = {
scaleOverlay: false,
scaleOverride: false,
scaleSteps: null,
scaleStepWidth: null,
scaleStartValue: null,
scaleLineColor: "rgba(0,0,0,.1)",
scaleLineWidth: 1,
scaleShowLabels: true,
scaleLabel: "<%=value%>",
scaleFontFamily: "'Arial'",
scaleFontSize: 12,
scaleFontStyle: "normal",
scaleFontColor: "#666",
scaleShowGridLines: true,
scaleGridLineColor: "rgba(0,0,0,.05)",
scaleGridLineWidth: 1,
barShowStroke: true,
barStrokeWidth: 2,
barValueSpacing: 5,
barDatasetSpacing: 1,
animation: true,
animationSteps: 60,
animationEasing: "easeOutQuart",
onAnimationComplete: null
};
var config = (options) ? mergeChartConfig(chart.Bar.defaults,options) : chart.Bar.defaults;
return new Bar(data,config,context);
}
// /////////////////////////////////////////////////////////////////
// Polar Area implementation
// /////////////////////////////////////////////////////////////////
var PolarArea = function(data,config,ctx) {
var maxSize;
var scaleHop;
var calculatedScale;
var labelHeight;
var scaleHeight;
var valueBounds;
var labelTemplateString;
// /////////////////////////////////////////////////////////////////
// initialisation
// /////////////////////////////////////////////////////////////////
this.init = function() {
calculateDrawingSizes();
valueBounds = getValueBounds();
labelTemplateString = (config.scaleShowLabels)? config.scaleLabel : null;
if (!config.scaleOverride) {
calculatedScale = calculateScale(scaleHeight,valueBounds.maxSteps,valueBounds.minSteps,valueBounds.maxValue,valueBounds.minValue,labelTemplateString);
} else {
calculatedScale = {
steps: config.scaleSteps,
stepValue: config.scaleStepWidth,
graphMin: config.scaleStartValue,
labels: []
}
populateLabels(labelTemplateString, calculatedScale.labels,calculatedScale.steps,config.scaleStartValue,config.scaleStepWidth);
}
scaleHop = maxSize/(calculatedScale.steps);
}
// /////////////////////////////////////////////////////////////////
// drawing
// /////////////////////////////////////////////////////////////////
this.draw = function(progress) {
clear(ctx);
if(config.scaleOverlay) {
drawAllSegments(progress);
drawScale();
} else {
drawScale();
drawAllSegments(progress);
}
}
// ///////////////////////////////////////////////////////////////
function calculateDrawingSizes() {
maxSize = (Min([width,height])/2);
maxSize -= Max([config.scaleFontSize*0.5,config.scaleLineWidth*0.5]);
labelHeight = config.scaleFontSize*2;
if (config.scaleShowLabelBackdrop) {
labelHeight += (2 * config.scaleBackdropPaddingY);
maxSize -= config.scaleBackdropPaddingY*1.5;
}
scaleHeight = maxSize;
labelHeight = Default(labelHeight,5);
}
function drawScale() {
for (var i=0; i<calculatedScale.steps; i++) {
if (config.scaleShowLine) {
ctx.beginPath();
ctx.arc(width/2, height/2, scaleHop * (i + 1), 0, (Math.PI * 2), true);
ctx.strokeStyle = config.scaleLineColor;
ctx.lineWidth = config.scaleLineWidth;
ctx.stroke();
}
if (config.scaleShowLabels) {
ctx.textAlign = "center";
ctx.font = config.scaleFontStyle + " " + config.scaleFontSize + "px " + config.scaleFontFamily;
var label = calculatedScale.labels[i];
if (config.scaleShowLabelBackdrop) {
var textWidth = ctx.measureText(label).width;
ctx.fillStyle = config.scaleBackdropColor;
ctx.beginPath();
ctx.rect(
Math.round(width/2 - textWidth/2 - config.scaleBackdropPaddingX),
Math.round(height/2 - (scaleHop * (i + 1)) - config.scaleFontSize*0.5 - config.scaleBackdropPaddingY),
Math.round(textWidth + (config.scaleBackdropPaddingX*2)),
Math.round(config.scaleFontSize + (config.scaleBackdropPaddingY*2))
);
ctx.fill();
}
ctx.textBaseline = "middle";
ctx.fillStyle = config.scaleFontColor;
ctx.fillText(label,width/2,height/2 - (scaleHop * (i + 1)));
}
}
}
function drawAllSegments(animationDecimal) {
var startAngle = -Math.PI/2,
angleStep = (Math.PI*2)/data.length,
scaleAnimation = 1,
rotateAnimation = 1;
if (config.animation) {
if (config.animateScale) {
scaleAnimation = animationDecimal;
}
if (config.animateRotate) {
rotateAnimation = animationDecimal;
}
}
for (var i=0; i<data.length; i++) {
ctx.beginPath();
ctx.arc(width/2,height/2,scaleAnimation * calculateOffset(data[i].value,calculatedScale,scaleHop),startAngle, startAngle + rotateAnimation*angleStep, false);
ctx.lineTo(width/2,height/2);
ctx.closePath();
ctx.fillStyle = data[i].color;
ctx.fill();
if(config.segmentShowStroke) {
ctx.strokeStyle = config.segmentStrokeColor;
ctx.lineWidth = config.segmentStrokeWidth;
ctx.stroke();
}
startAngle += rotateAnimation*angleStep;
}
}
function getValueBounds() {
var upperValue = Number.MIN_VALUE;
var lowerValue = Number.MAX_VALUE;
for (var i=0; i<data.length; i++) {
if (data[i].value > upperValue) {upperValue = data[i].value;}
if (data[i].value < lowerValue) {lowerValue = data[i].value;}
};
var maxSteps = Math.floor((scaleHeight / (labelHeight*0.66)));
var minSteps = Math.floor((scaleHeight / labelHeight*0.5));
return {
maxValue: upperValue,
minValue: lowerValue,
maxSteps: maxSteps,
minSteps: minSteps
};
}
}
// /////////////////////////////////////////////////////////////////
// Radar implementation
// /////////////////////////////////////////////////////////////////
var Radar = function (data, config, ctx) {
var maxSize;
var scaleHop;
var calculatedScale;
var labelHeight;
var scaleHeight;
var valueBounds;
var labelTemplateString;
// /////////////////////////////////////////////////////////////////
// initialisation
// /////////////////////////////////////////////////////////////////
this.init = function () {
if (!data.labels) data.labels = [];
calculateDrawingSizes();
var valueBounds = getValueBounds();
labelTemplateString = (config.scaleShowLabels)? config.scaleLabel : null;
if (!config.scaleOverride) {
calculatedScale = calculateScale(scaleHeight,valueBounds.maxSteps,valueBounds.minSteps,valueBounds.maxValue,valueBounds.minValue,labelTemplateString);
} else {
calculatedScale = {
steps: config.scaleSteps,
stepValue: config.scaleStepWidth,
graphMin: config.scaleStartValue,
labels: []
}
populateLabels(labelTemplateString, calculatedScale.labels,calculatedScale.steps,config.scaleStartValue,config.scaleStepWidth);
}
scaleHop = maxSize/(calculatedScale.steps);
}
// /////////////////////////////////////////////////////////////////
// drawing
// /////////////////////////////////////////////////////////////////
this.draw = function(progress) {
clear(ctx);
if(config.scaleOverlay) {
drawAllDataPoints(progress);
drawScale();
} else {
drawScale();
drawAllDataPoints(progress);
}
}
// ///////////////////////////////////////////////////////////////
function drawAllDataPoints(animationDecimal) {
var rotationDegree = (2*Math.PI)/data.datasets[0].data.length;
ctx.save();
ctx.translate(width/2,height/2);
for (var i=0; i<data.datasets.length; i++) {
ctx.beginPath();
ctx.moveTo(0,animationDecimal*(-1*calculateOffset(data.datasets[i].data[0],calculatedScale,scaleHop)));
for (var j=1; j<data.datasets[i].data.length; j++) {
ctx.rotate(rotationDegree);
ctx.lineTo(0,animationDecimal*(-1*calculateOffset(data.datasets[i].data[j],calculatedScale,scaleHop)));
}
ctx.closePath();
ctx.fillStyle = data.datasets[i].fillColor;
ctx.strokeStyle = data.datasets[i].strokeColor;
ctx.lineWidth = config.datasetStrokeWidth;
ctx.fill();
ctx.stroke();
if (config.pointDot) {
ctx.fillStyle = data.datasets[i].pointColor;
ctx.strokeStyle = data.datasets[i].pointStrokeColor;
ctx.lineWidth = config.pointDotStrokeWidth;
for (var k=0; k<data.datasets[i].data.length; k++) {
ctx.rotate(rotationDegree);
ctx.beginPath();
ctx.arc(0,animationDecimal*(-1*calculateOffset(data.datasets[i].data[k],calculatedScale,scaleHop)),config.pointDotRadius,2*Math.PI,false);
ctx.fill();
ctx.stroke();
}
}
ctx.rotate(rotationDegree);
}
ctx.restore();
}
function drawScale() {
var rotationDegree = (2*Math.PI)/data.datasets[0].data.length;
ctx.save();
ctx.translate(width/2, height/2);
if (config.angleShowLineOut) {
ctx.strokeStyle = config.angleLineColor;
ctx.lineWidth = config.angleLineWidth;
for (var h=0; h<data.datasets[0].data.length; h++) {
ctx.rotate(rotationDegree);
ctx.beginPath();
ctx.moveTo(0,0);
ctx.lineTo(0,-maxSize);
ctx.stroke();
}
}
for (var i=0; i<calculatedScale.steps; i++) {
ctx.beginPath();
if(config.scaleShowLine) {
ctx.strokeStyle = config.scaleLineColor;
ctx.lineWidth = config.scaleLineWidth;
ctx.moveTo(0,-scaleHop * (i+1));
for (var j=0; j<data.datasets[0].data.length; j++) {
ctx.rotate(rotationDegree);
ctx.lineTo(0,-scaleHop * (i+1));
}
ctx.closePath();
ctx.stroke();
}
if (config.scaleShowLabels) {
ctx.textAlign = 'center';
ctx.font = config.scaleFontStyle + " " + config.scaleFontSize+"px " + config.scaleFontFamily;
ctx.textBaseline = "middle";
if (config.scaleShowLabelBackdrop) {
var textWidth = ctx.measureText(calculatedScale.labels[i]).width;
ctx.fillStyle = config.scaleBackdropColor;
ctx.beginPath();
ctx.rect(
Math.round(- textWidth/2 - config.scaleBackdropPaddingX), //X
Math.round((-scaleHop * (i + 1)) - config.scaleFontSize*0.5 - config.scaleBackdropPaddingY),//Y
Math.round(textWidth + (config.scaleBackdropPaddingX*2)), //Width
Math.round(config.scaleFontSize + (config.scaleBackdropPaddingY*2)) //Height
);
ctx.fill();
}
ctx.fillStyle = config.scaleFontColor;
ctx.fillText(calculatedScale.labels[i],0,-scaleHop*(i+1));
}
}
for (var k=0; k<data.labels.length; k++) {
ctx.font = config.pointLabelFontStyle + " " + config.pointLabelFontSize+"px " + config.pointLabelFontFamily;
ctx.fillStyle = config.pointLabelFontColor;
var opposite = Math.sin(rotationDegree*k) * (maxSize + config.pointLabelFontSize);
var adjacent = Math.cos(rotationDegree*k) * (maxSize + config.pointLabelFontSize);
if(rotationDegree*k == Math.PI || rotationDegree*k == 0) {
ctx.textAlign = "center";
} else if(rotationDegree*k > Math.PI) {
ctx.textAlign = "right";
} else {
ctx.textAlign = "left";
}
ctx.textBaseline = "middle";
ctx.fillText(data.labels[k],opposite,-adjacent);
}
ctx.restore();
};
function calculateDrawingSizes() {
maxSize = (Min([width,height])/2);
labelHeight = config.scaleFontSize*2;
var labelLength = 0;
for (var i=0; i<data.labels.length; i++) {
ctx.font = config.pointLabelFontStyle + " " + config.pointLabelFontSize+"px " + config.pointLabelFontFamily;
var textMeasurement = ctx.measureText(data.labels[i]).width;
if(textMeasurement>labelLength) labelLength = textMeasurement;
}
maxSize -= Max([labelLength,((config.pointLabelFontSize/2)*1.5)]);
maxSize -= config.pointLabelFontSize;
maxSize = CapValue(maxSize, null, 0);
scaleHeight = maxSize;
labelHeight = Default(labelHeight,5);
};
function getValueBounds() {
var upperValue = Number.MIN_VALUE;
var lowerValue = Number.MAX_VALUE;
for (var i=0; i<data.datasets.length; i++) {
for (var j=0; j<data.datasets[i].data.length; j++) {
if (data.datasets[i].data[j] > upperValue) {upperValue = data.datasets[i].data[j]}
if (data.datasets[i].data[j] < lowerValue) {lowerValue = data.datasets[i].data[j]}
}
}
var maxSteps = Math.floor((scaleHeight / (labelHeight*0.66)));
var minSteps = Math.floor((scaleHeight / labelHeight*0.5));
return {
maxValue: upperValue,
minValue: lowerValue,
maxSteps: maxSteps,
minSteps: minSteps
};
}
}
// /////////////////////////////////////////////////////////////////
// Pie implementation
// /////////////////////////////////////////////////////////////////
var Pie = function(data,config,ctx) {
var segmentTotal = 0;
var pieRadius = Min([height/2,width/2]) - 5;
// /////////////////////////////////////////////////////////////////
// initialisation
// /////////////////////////////////////////////////////////////////
this.init = function () {
for (var i=0; i<data.length; i++) {
segmentTotal += data[i].value;
}
}
// /////////////////////////////////////////////////////////////////
// drawing
// /////////////////////////////////////////////////////////////////
this.draw = function (progress) {
clear(ctx);
drawPieSegments(progress);
}
// ///////////////////////////////////////////////////////////////
function drawPieSegments (animationDecimal) {
var cumulativeAngle = -Math.PI/2,
scaleAnimation = 1,
rotateAnimation = 1;
if (config.animation) {
if (config.animateScale) {
scaleAnimation = animationDecimal;
}
if (config.animateRotate) {
rotateAnimation = animationDecimal;
}
}
for (var i=0; i<data.length; i++) {
var segmentAngle = rotateAnimation * ((data[i].value/segmentTotal) * (Math.PI*2));
ctx.beginPath();
ctx.arc(width/2,height/2,scaleAnimation * pieRadius,cumulativeAngle,cumulativeAngle + segmentAngle);
ctx.lineTo(width/2,height/2);
ctx.closePath();
ctx.fillStyle = data[i].color;
ctx.fill();
if(config.segmentShowStroke) {
ctx.lineWidth = config.segmentStrokeWidth;
ctx.strokeStyle = config.segmentStrokeColor;
ctx.stroke();
}
cumulativeAngle += segmentAngle;
}
}
}
// /////////////////////////////////////////////////////////////////
// Doughnut implementation
// /////////////////////////////////////////////////////////////////
var Doughnut = function(data,config,ctx) {
var segmentTotal = 0;
var doughnutRadius = Min([height/2,width/2]) - 5;
var cutoutRadius = doughnutRadius * (config.percentageInnerCutout/100);
// /////////////////////////////////////////////////////////////////
// initialisation
// /////////////////////////////////////////////////////////////////
this.init = function () {
for (var i=0; i<data.length; i++) {
segmentTotal += data[i].value;
}
}
// /////////////////////////////////////////////////////////////////
// drawing
// /////////////////////////////////////////////////////////////////
this.draw = function (progress) {
clear(ctx);
drawDoughnutSegments(progress);
}
// ///////////////////////////////////////////////////////////////
function drawDoughnutSegments (animationDecimal) {
var cumulativeAngle = -Math.PI/2,
scaleAnimation = 1,
rotateAnimation = 1;
if (config.animation) {
if (config.animateScale) {
scaleAnimation = animationDecimal;
}
if (config.animateRotate) {
rotateAnimation = animationDecimal;
}
}
for (var i=0; i<data.length; i++) {
var segmentAngle = rotateAnimation * ((data[i].value/segmentTotal) * (Math.PI*2));
ctx.beginPath();
ctx.arc(width/2,height/2,scaleAnimation * doughnutRadius,cumulativeAngle,cumulativeAngle + segmentAngle,false);
ctx.arc(width/2,height/2,scaleAnimation * cutoutRadius,cumulativeAngle + segmentAngle,cumulativeAngle,true);
ctx.closePath();
ctx.fillStyle = data[i].color;
ctx.fill();
if(config.segmentShowStroke) {
ctx.lineWidth = config.segmentStrokeWidth;
ctx.strokeStyle = config.segmentStrokeColor;
ctx.stroke();
}
cumulativeAngle += segmentAngle;
}
}
}
// /////////////////////////////////////////////////////////////////
// Line implementation
// /////////////////////////////////////////////////////////////////
var Line = function(data,config,ctx) {
var maxSize;
var scaleHop;
var calculatedScale;
var labelHeight;
var scaleHeight;
var valueBounds;
var labelTemplateString;
var valueHop;
var widestXLabel;
var xAxisLength;
var yAxisPosX;
var xAxisPosY;
var rotateLabels = 0;
// /////////////////////////////////////////////////////////////////
// initialisation
// /////////////////////////////////////////////////////////////////
this.init = function () {
calculateDrawingSizes();
valueBounds = getValueBounds();
labelTemplateString = (config.scaleShowLabels)? config.scaleLabel : "";
if (!config.scaleOverride) {
calculatedScale = calculateScale(scaleHeight,valueBounds.maxSteps,valueBounds.minSteps,valueBounds.maxValue,valueBounds.minValue,labelTemplateString);
} else {
calculatedScale = {
steps: config.scaleSteps,
stepValue: config.scaleStepWidth,
graphMin: config.scaleStartValue,
labels: []
}
populateLabels(labelTemplateString, calculatedScale.labels,calculatedScale.steps,config.scaleStartValue,config.scaleStepWidth);
}
scaleHop = Math.floor(scaleHeight/calculatedScale.steps);
calculateXAxisSize();
}
// /////////////////////////////////////////////////////////////////
// drawing
// /////////////////////////////////////////////////////////////////
this.draw = function (progress) {
clear(ctx);
if(config.scaleOverlay) {
drawLines(progress);
drawScale();
} else {
drawScale();
drawLines(progress);
}
}
// ///////////////////////////////////////////////////////////////
function drawLines(animPc) {
for (var i=0; i<data.datasets.length; i++) {
ctx.strokeStyle = data.datasets[i].strokeColor;
ctx.lineWidth = config.datasetStrokeWidth;
ctx.beginPath();
ctx.moveTo(yAxisPosX, xAxisPosY - animPc*(calculateOffset(data.datasets[i].data[0],calculatedScale,scaleHop)))
for (var j=1; j<data.datasets[i].data.length; j++) {
if (config.bezierCurve) {
ctx.bezierCurveTo(xPos(j-0.5),yPos(i,j-1),xPos(j-0.5),yPos(i,j),xPos(j),yPos(i,j));
} else{
ctx.lineTo(xPos(j),yPos(i,j));
}
}
ctx.stroke();
if (config.datasetFill) {
ctx.lineTo(yAxisPosX + (valueHop*(data.datasets[i].data.length-1)),xAxisPosY);
ctx.lineTo(yAxisPosX,xAxisPosY);
ctx.closePath();
ctx.fillStyle = data.datasets[i].fillColor;
ctx.fill();
} else {
ctx.closePath();
}
if (config.pointDot) {
ctx.fillStyle = data.datasets[i].pointColor;
ctx.strokeStyle = data.datasets[i].pointStrokeColor;
ctx.lineWidth = config.pointDotStrokeWidth;
for (var k=0; k<data.datasets[i].data.length; k++) {
ctx.beginPath();
ctx.arc(yAxisPosX + (valueHop *k),xAxisPosY - animPc*(calculateOffset(data.datasets[i].data[k],calculatedScale,scaleHop)),config.pointDotRadius,0,Math.PI*2,true);
ctx.fill();
ctx.stroke();
}
}
}
function yPos(dataSet,iteration) {
return xAxisPosY - animPc*(calculateOffset(data.datasets[dataSet].data[iteration],calculatedScale,scaleHop));
}
function xPos(iteration) {
return yAxisPosX + (valueHop * iteration);
}
}
function drawScale() {
ctx.lineWidth = config.scaleLineWidth;
ctx.strokeStyle = config.scaleLineColor;
ctx.beginPath();
ctx.moveTo(width-widestXLabel/2+5,xAxisPosY);
ctx.lineTo(width-(widestXLabel/2)-xAxisLength-5,xAxisPosY);
ctx.stroke();
if (rotateLabels > 0) {
ctx.save();
ctx.textAlign = "right";
} else{
ctx.textAlign = "center";
}
ctx.fillStyle = config.scaleFontColor;
for (var i=0; i<data.labels.length; i++) {
ctx.save();
if (rotateLabels > 0) {
ctx.translate(yAxisPosX + i*valueHop,xAxisPosY + config.scaleFontSize);
ctx.rotate(-(rotateLabels * (Math.PI/180)));
ctx.fillText(data.labels[i], 0,0);
ctx.restore();
} else {
ctx.fillText(data.labels[i], yAxisPosX + i*valueHop,xAxisPosY + config.scaleFontSize+3);
}
ctx.beginPath();
ctx.moveTo(yAxisPosX + i * valueHop, xAxisPosY+3);
if(config.scaleShowGridLines && i>0) {
ctx.lineWidth = config.scaleGridLineWidth;
ctx.strokeStyle = config.scaleGridLineColor;
ctx.lineTo(yAxisPosX + i * valueHop, 5);
} else{
ctx.lineTo(yAxisPosX + i * valueHop, xAxisPosY+3);
}
ctx.stroke();
}
ctx.lineWidth = config.scaleLineWidth;
ctx.strokeStyle = config.scaleLineColor;
ctx.beginPath();
ctx.moveTo(yAxisPosX,xAxisPosY+5);
ctx.lineTo(yAxisPosX,5);
ctx.stroke();
ctx.textAlign = "right";
ctx.textBaseline = "middle";
for (var j=0; j<calculatedScale.steps; j++) {
ctx.beginPath();
ctx.moveTo(yAxisPosX-3,xAxisPosY - ((j+1) * scaleHop));
if (config.scaleShowGridLines) {
ctx.lineWidth = config.scaleGridLineWidth;
ctx.strokeStyle = config.scaleGridLineColor;
ctx.lineTo(yAxisPosX + xAxisLength + 5,xAxisPosY - ((j+1) * scaleHop));
} else {
ctx.lineTo(yAxisPosX-0.5,xAxisPosY - ((j+1) * scaleHop));
}
ctx.stroke();
if (config.scaleShowLabels) {
ctx.fillText(calculatedScale.labels[j],yAxisPosX-8,xAxisPosY - ((j+1) * scaleHop));
}
}
}
function calculateXAxisSize() {
var longestText = 1;
if (config.scaleShowLabels) {
ctx.font = config.scaleFontStyle + " " + config.scaleFontSize+"px " + config.scaleFontFamily;
for (var i=0; i<calculatedScale.labels.length; i++) {
var measuredText = ctx.measureText(calculatedScale.labels[i]).width;
longestText = (measuredText > longestText)? measuredText : longestText;
}
longestText +=10;
}
xAxisLength = width - longestText - widestXLabel;
valueHop = Math.floor(xAxisLength/(data.labels.length-1));
yAxisPosX = width-widestXLabel/2-xAxisLength;
xAxisPosY = scaleHeight + config.scaleFontSize/2;
}
function calculateDrawingSizes() {
maxSize = height;
ctx.font = config.scaleFontStyle + " " + config.scaleFontSize+"px " + config.scaleFontFamily;
widestXLabel = 1;
for (var i=0; i<data.labels.length; i++) {
var textLength = ctx.measureText(data.labels[i]).width;
widestXLabel = (textLength > widestXLabel)? textLength : widestXLabel;
}
if (width/data.labels.length < widestXLabel) {
rotateLabels = 45;
if (width/data.labels.length < Math.cos(rotateLabels) * widestXLabel) {