WasteInformationServer/resources/wwwroot/lib/AdminLTE/plugins/sparklines/sparkline.js

211 lines
7.0 KiB
JavaScript

(function (root, factory) {
if (typeof define === 'function' && define.amd) {
// AMD. Register as an anonymous module.
define(factory);
} else if (typeof exports === 'object') {
// Node. Does not work with strict CommonJS, but
// only CommonJS-like enviroments that support module.exports,
// like Node.
module.exports = factory();
} else {
// Browser globals (root is window)
root.Sparkline = factory();
}
}(window, function () {
function extend(specific, general) {
var obj = {};
for (var key in general) {
obj[key] = key in specific ? specific[key] : general[key];
}
return obj;
}
function Sparkline(element, options) {
this.element = element;
this.options = extend(options || {}, Sparkline.options);
init: {
this.element.innerHTML = "<canvas></canvas>";
this.canvas = this.element.firstChild;
this.context = this.canvas.getContext("2d");
this.ratio = window.devicePixelRatio || 1;
if (this.options.tooltip) {
this.canvas.style.position = "relative";
this.canvas.onmousemove = showTooltip.bind(this);
}
}
}
Sparkline.options = {
width: 100,
height: null,
lineColor: "black",
lineWidth: 1.5,
startColor: "transparent",
endColor: "black",
maxColor: "transparent",
minColor: "transparent",
minValue: null,
maxValue: null,
minMaxValue: null,
maxMinValue: null,
dotRadius: 2.5,
tooltip: null,
fillBelow: true,
fillLighten: 0.5,
startLine: false,
endLine: false,
minLine: false,
maxLine: false,
bottomLine: false,
topLine: false,
averageLine: false
};
Sparkline.init = function (element, options) {
return new Sparkline(element, options);
};
Sparkline.draw = function (element, points, options) {
var sparkline = new Sparkline(element, options);
sparkline.draw(points);
return sparkline;
}
function getY(minValue, maxValue, offsetY, height, index) {
var range = maxValue - minValue;
if (range == 0) {
return offsetY + height / 2;
} else {
return (offsetY + height) - ((this[index] - minValue) / range) * height;
}
}
function drawDot(radius, x1, x2, color, line, x, y) {
this.context.beginPath();
this.context.fillStyle = color;
this.context.arc(x, y, radius, 0, Math.PI * 2, false);
this.context.fill();
drawLine.call(this, x1, x2, line, x, y);
}
function drawLine(x1, x2, style, x, y){
if(!style) return;
this.context.save();
this.context.strokeStyle = style.color || 'black';
this.context.lineWidth = (style.width || 1) * this.ratio;
this.context.globalAlpha = style.alpha || 1;
this.context.beginPath();
this.context.moveTo(style.direction != 'right' ? x1 : x, y);
this.context.lineTo(style.direction != 'left' ? x2 : x, y);
this.context.stroke();
this.context.restore();
}
function showTooltip(e) {
var x = e.offsetX || e.layerX || 0;
var delta = ((this.options.width - this.options.dotRadius * 2) / (this.points.length - 1));
var index = minmax(0, Math.round((x - this.options.dotRadius) / delta), this.points.length - 1);
this.canvas.title = this.options.tooltip(this.points[index], index, this.points);
}
Sparkline.prototype.draw = function (points) {
points = points || [];
this.points = points;
this.canvas.width = this.options.width * this.ratio;
this.canvas.style.width = this.options.width + 'px';
var pxHeight = this.options.height || this.element.offsetHeight;
this.canvas.height = pxHeight * this.ratio;
this.canvas.style.height = pxHeight + 'px';
var lineWidth = this.options.lineWidth * this.ratio;
var offsetX = Math.max(this.options.dotRadius * this.ratio, lineWidth/2);
var offsetY = Math.max(this.options.dotRadius * this.ratio, lineWidth/2);
var width = this.canvas.width - offsetX * 2;
var height = this.canvas.height - offsetY * 2;
var minValue = Math.min.apply(Math, points);
var maxValue = Math.max.apply(Math, points);
var bottomValue = this.options.minValue != undefined ? this.options.minValue : Math.min(minValue, this.options.maxMinValue != undefined ? this.options.maxMinValue : minValue);
var topValue = this.options.maxValue != undefined ? this.options.maxValue : Math.max(maxValue, this.options.minMaxValue != undefined ? this.options.minMaxValue : maxValue);
var minX = offsetX;
var maxX = offsetX;
var x = offsetX;
var y = getY.bind(points, bottomValue, topValue, offsetY, height);
var delta = width / (points.length - 1);
var dot = drawDot.bind(this, this.options.dotRadius * this.ratio, offsetX, width + offsetX);
var line = drawLine.bind(this, offsetX, width + offsetX);
this.context.save();
this.context.strokeStyle = this.options.lineColor;
this.context.fillStyle = this.options.lineColor;
this.context.lineWidth = lineWidth;
this.context.lineCap = 'round';
this.context.lineJoin = 'round';
if(this.options.fillBelow && points.length > 1){
this.context.save();
this.context.beginPath();
this.context.moveTo(x, y(0));
for (var i = 1; i < points.length; i++) {
x += delta;
minX = points[i] == minValue ? x : minX;
maxX = points[i] == maxValue ? x : maxX;
this.context.lineTo(x, y(i));
}
this.context.lineTo(width+offsetX, height + offsetY + lineWidth/2);
this.context.lineTo(offsetX, height + offsetY + lineWidth/2);
this.context.fill();
if(this.options.fillLighten > 0){
this.context.fillStyle = 'white';
this.context.globalAlpha = this.options.fillLighten;
this.context.fill();
this.context.globalAlpha = 1;
}else if(this.options.fillLighten < 0){
this.context.fillStyle = 'black';
this.context.globalAlpha = -this.options.fillLighten;
this.context.fill();
}
this.context.restore();
}
x = offsetX;
this.context.beginPath();
this.context.moveTo(x, y(0));
for (var i = 1; i < points.length; i++) {
x += delta;
this.context.lineTo(x, y(i));
}
this.context.stroke();
this.context.restore();
line(this.options.bottomLine, 0, offsetY);
line(this.options.topLine, 0, height + offsetY+lineWidth/2);
dot(this.options.startColor, this.options.startLine, offsetX + (points.length == 1 ? width / 2 : 0), y(0));
dot(this.options.endColor, this.options.endLine, offsetX + (points.length == 1 ? width / 2 : width), y(points.length-1));
dot(this.options.minColor, this.options.minLine, minX + (points.length == 1 ? width / 2 : 0), y(points.indexOf(minValue)));
dot(this.options.maxColor, this.options.maxLine, maxX + (points.length == 1 ? width / 2 : 0), y(points.indexOf(maxValue)));
//line(this.options.averageLine, )
}
function minmax(a, b, c) {
return Math.max(a, Math.min(b, c));
}
return Sparkline;
}));