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Chart.Line.js

(function(){
	"use strict";

var root = this,
		Chart = root.Chart,
		helpers = Chart.helpers;

var defaultConfig = {

///Boolean - Whether grid lines are shown across the chart
		scaleShowGridLines : true,

//String - Colour of the grid lines
		scaleGridLineColor : "rgba(0,0,0,.05)",

//Number - Width of the grid lines
		scaleGridLineWidth : 1,

//Boolean - Whether the line is curved between points
		bezierCurve : true,

//Number - Tension of the bezier curve between points
		bezierCurveTension : 0.4,

//Boolean - Whether to show a dot for each point
		pointDot : true,

//Number - Radius of each point dot in pixels
		pointDotRadius : 4,

//Number - Pixel width of point dot stroke
		pointDotStrokeWidth : 1,

//Number - amount extra to add to the radius to cater for hit detection outside the drawn point
		pointHitDetectionRadius : 20,

//Boolean - Whether to show a stroke for datasets
		datasetStroke : true,

//Number - Pixel width of dataset stroke
		datasetStrokeWidth : 2,

//Boolean - Whether to fill the dataset with a colour
		datasetFill : true,

//String - A legend template
		legendTemplate : "<ul class=\"<%=name.toLowerCase()%>-legend\"><% for (var i=0; i<datasets.length; i++){%><li><span style=\"background-color:<%=datasets[i].strokeColor%>\"></span><%if(datasets[i].label){%><%=datasets[i].label%><%}%></li><%}%></ul>"

};

Chart.Type.extend({
		name: "Line",
		defaults : defaultConfig,
		initialize:  function(data){
			//Declare the extension of the default point, to cater for the options passed in to the constructor
			this.PointClass = Chart.Point.extend({
				strokeWidth : this.options.pointDotStrokeWidth,
				radius : this.options.pointDotRadius,
				display: this.options.pointDot,
				hitDetectionRadius : this.options.pointHitDetectionRadius,
				ctx : this.chart.ctx,
				inRange : function(mouseX){
					return (Math.pow(mouseX-this.x, 2) < Math.pow(this.radius + this.hitDetectionRadius,2));
				}
			});

this.datasets = [];

//Set up tooltip events on the chart
			if (this.options.showTooltips){
				helpers.bindEvents(this, this.options.tooltipEvents, function(evt){
					var activePoints = (evt.type !== 'mouseout') ? this.getPointsAtEvent(evt) : [];
					this.eachPoints(function(point){
						point.restore(['fillColor', 'strokeColor']);
					});
					helpers.each(activePoints, function(activePoint){
						activePoint.fillColor = activePoint.highlightFill;
						activePoint.strokeColor = activePoint.highlightStroke;
					});
					this.showTooltip(activePoints);
				});
			}

//Iterate through each of the datasets, and build this into a property of the chart
			helpers.each(data.datasets,function(dataset){

var datasetObject = {
					label : dataset.label || null,
					fillColor : dataset.fillColor,
					strokeColor : dataset.strokeColor,
					pointColor : dataset.pointColor,
					pointStrokeColor : dataset.pointStrokeColor,
					points : []
				};

this.datasets.push(datasetObject);

helpers.each(dataset.data,function(dataPoint,index){
					//Add a new point for each piece of data, passing any required data to draw.
					datasetObject.points.push(new this.PointClass({
						value : dataPoint,
						label : data.labels[index],
						datasetLabel: dataset.label,
						strokeColor : dataset.pointStrokeColor,
						fillColor : dataset.pointColor,
						highlightFill : dataset.pointHighlightFill || dataset.pointColor,
						highlightStroke : dataset.pointHighlightStroke || dataset.pointStrokeColor
					}));
				},this);

this.buildScale(data.labels);

this.eachPoints(function(point, index){
					helpers.extend(point, {
						x: this.scale.calculateX(index),
						y: this.scale.endPoint
					});
					point.save();
				}, this);

},this);

this.render();
		},
		update : function(){
			this.scale.update();
			// Reset any highlight colours before updating.
			helpers.each(this.activeElements, function(activeElement){
				activeElement.restore(['fillColor', 'strokeColor']);
			});
			this.eachPoints(function(point){
				point.save();
			});
			this.render();
		},
		eachPoints : function(callback){
			helpers.each(this.datasets,function(dataset){
				helpers.each(dataset.points,callback,this);
			},this);
		},
		getPointsAtEvent : function(e){
			var pointsArray = [],
				eventPosition = helpers.getRelativePosition(e);
			helpers.each(this.datasets,function(dataset){
				helpers.each(dataset.points,function(point){
					if (point.inRange(eventPosition.x,eventPosition.y)) pointsArray.push(point);
				});
			},this);
			return pointsArray;
		},
		buildScale : function(labels){
			var self = this;

var dataTotal = function(){
				var values = [];
				self.eachPoints(function(point){
					values.push(point.value);
				});

return values;
			};

var scaleOptions = {
				templateString : this.options.scaleLabel,
				height : this.chart.height,
				width : this.chart.width,
				ctx : this.chart.ctx,
				textColor : this.options.scaleFontColor,
				fontSize : this.options.scaleFontSize,
				fontStyle : this.options.scaleFontStyle,
				fontFamily : this.options.scaleFontFamily,
				valuesCount : labels.length,
				beginAtZero : this.options.scaleBeginAtZero,
				integersOnly : this.options.scaleIntegersOnly,
				calculateYRange : function(currentHeight){
					var updatedRanges = helpers.calculateScaleRange(
						dataTotal(),
						currentHeight,
						this.fontSize,
						this.beginAtZero,
						this.integersOnly
					);
					helpers.extend(this, updatedRanges);
				},
				xLabels : labels,
				font : helpers.fontString(this.options.scaleFontSize, this.options.scaleFontStyle, this.options.scaleFontFamily),
				lineWidth : this.options.scaleLineWidth,
				lineColor : this.options.scaleLineColor,
				gridLineWidth : (this.options.scaleShowGridLines) ? this.options.scaleGridLineWidth : 0,
				gridLineColor : (this.options.scaleShowGridLines) ? this.options.scaleGridLineColor : "rgba(0,0,0,0)",
				padding: (this.options.showScale) ? 0 : this.options.pointDotRadius + this.options.pointDotStrokeWidth,
				showLabels : this.options.scaleShowLabels,
				display : this.options.showScale
			};

if (this.options.scaleOverride){
				helpers.extend(scaleOptions, {
					calculateYRange: helpers.noop,
					steps: this.options.scaleSteps,
					stepValue: this.options.scaleStepWidth,
					min: this.options.scaleStartValue,
					max: this.options.scaleStartValue + (this.options.scaleSteps * this.options.scaleStepWidth)
				});
			}

this.scale = new Chart.Scale(scaleOptions);
		},
		addData : function(valuesArray,label){
			//Map the values array for each of the datasets

helpers.each(valuesArray,function(value,datasetIndex){
				//Add a new point for each piece of data, passing any required data to draw.
				this.datasets[datasetIndex].points.push(new this.PointClass({
					value : value,
					label : label,
					x: this.scale.calculateX(this.scale.valuesCount+1),
					y: this.scale.endPoint,
					strokeColor : this.datasets[datasetIndex].pointStrokeColor,
					fillColor : this.datasets[datasetIndex].pointColor
				}));
			},this);

this.scale.addXLabel(label);
			//Then re-render the chart.
			this.update();
		},
		removeData : function(){
			this.scale.removeXLabel();
			//Then re-render the chart.
			helpers.each(this.datasets,function(dataset){
				dataset.points.shift();
			},this);
			this.update();
		},
		reflow : function(){
			var newScaleProps = helpers.extend({
				height : this.chart.height,
				width : this.chart.width
			});
			this.scale.update(newScaleProps);
		},
		draw : function(ease){
			var easingDecimal = ease || 1;
			this.clear();

var ctx = this.chart.ctx;

// Some helper methods for getting the next/prev points
			var hasValue = function(item){
				return item.value !== null;
			},
			nextPoint = function(point, collection, index){
				return helpers.findNextWhere(collection, hasValue, index) || point;
			},
			previousPoint = function(point, collection, index){
				return helpers.findPreviousWhere(collection, hasValue, index) || point;
			};

this.scale.draw(easingDecimal);

helpers.each(this.datasets,function(dataset){
				var pointsWithValues = helpers.where(dataset.points, hasValue);

//Transition each point first so that the line and point drawing isn't out of sync
				//We can use this extra loop to calculate the control points of this dataset also in this loop

helpers.each(dataset.points, function(point, index){
					if (point.hasValue()){
						point.transition({
							y : this.scale.calculateY(point.value),
							x : this.scale.calculateX(index)
						}, easingDecimal);
					}
				},this);

// Control points need to be calculated in a seperate loop, because we need to know the current x/y of the point
				// This would cause issues when there is no animation, because the y of the next point would be 0, so beziers would be skewed
				if (this.options.bezierCurve){
					helpers.each(pointsWithValues, function(point, index){
						var tension = (index > 0 && index < pointsWithValues.length - 1) ? this.options.bezierCurveTension : 0;
						point.controlPoints = helpers.splineCurve(
							previousPoint(point, pointsWithValues, index),
							point,
							nextPoint(point, pointsWithValues, index),
							tension
						);

// Prevent the bezier going outside of the bounds of the graph

// Cap puter bezier handles to the upper/lower scale bounds
						if (point.controlPoints.outer.y > this.scale.endPoint){
							point.controlPoints.outer.y = this.scale.endPoint;
						}
						else if (point.controlPoints.outer.y < this.scale.startPoint){
							point.controlPoints.outer.y = this.scale.startPoint;
						}

// Cap inner bezier handles to the upper/lower scale bounds
						if (point.controlPoints.inner.y > this.scale.endPoint){
							point.controlPoints.inner.y = this.scale.endPoint;
						}
						else if (point.controlPoints.inner.y < this.scale.startPoint){
							point.controlPoints.inner.y = this.scale.startPoint;
						}
					},this);
				}

//Draw the line between all the points
				ctx.lineWidth = this.options.datasetStrokeWidth;
				ctx.strokeStyle = dataset.strokeColor;
				ctx.beginPath();

helpers.each(pointsWithValues, function(point, index){
					if (index === 0){
						ctx.moveTo(point.x, point.y);
					}
					else{
						if(this.options.bezierCurve){
							var previous = previousPoint(point, pointsWithValues, index);

ctx.bezierCurveTo(
								previous.controlPoints.outer.x,
								previous.controlPoints.outer.y,
								point.controlPoints.inner.x,
								point.controlPoints.inner.y,
								point.x,
								point.y
							);
						}
						else{
							ctx.lineTo(point.x,point.y);
						}
					}
				}, this);

ctx.stroke();

if (this.options.datasetFill && pointsWithValues.length > 0){
					//Round off the line by going to the base of the chart, back to the start, then fill.
					ctx.lineTo(pointsWithValues[pointsWithValues.length - 1].x, this.scale.endPoint);
					ctx.lineTo(pointsWithValues[0].x, this.scale.endPoint);
					ctx.fillStyle = dataset.fillColor;
					ctx.closePath();
					ctx.fill();
				}

//Now draw the points over the line
				//A little inefficient double looping, but better than the line
				//lagging behind the point positions
				helpers.each(pointsWithValues,function(point){
					point.draw();
				});
			},this);
		}
	});

}).call(this);

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	www-data/www-data	drwxr-sr-x	2023-12-30 01:12:43
..	dir	-	www-data/www-data	drwxr-sr-x	2023-12-30 01:12:43
Chart.Bar.js	text/plain	9.15 KB	www-data/www-data	-rwxr-xr-x	2023-12-30 01:12:43
Chart.Core.js	text/plain	61.19 KB	www-data/www-data	-rwxr-xr-x	2023-12-30 01:12:43
Chart.Doughnut.js	text/plain	5.68 KB	www-data/www-data	-rwxr-xr-x	2023-12-30 01:12:43
Chart.Line.js	text/plain	11.2 KB	www-data/www-data	-rwxr-xr-x	2023-12-30 01:12:43
Chart.PolarArea.js	text/plain	7.44 KB	www-data/www-data	-rwxr-xr-x	2023-12-30 01:12:43
Chart.Radar.js	text/plain	9.85 KB	www-data/www-data	-rwxr-xr-x	2023-12-30 01:12:43