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1019 lines
36 KiB
JavaScript
1019 lines
36 KiB
JavaScript
/*!
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* jquery.flot.gauge v1.1.0 *
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*
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* Flot plugin for rendering gauge charts.
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*
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* Copyright (c) 2015 @toyoty99.
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* Licensed under the MIT license.
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*/
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/**
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* @module flot.gauge
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*/
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(function($) {
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/**
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* Gauge class
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*
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* @class Gauge
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*/
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var Gauge = (function() {
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/**
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* context of canvas
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*
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* @property context
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* @type Object
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*/
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var context;
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/**
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* placeholder of canvas
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*
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* @property placeholder
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* @type Object
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*/
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var placeholder;
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/**
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* options of plot
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*
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* @property options
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* @type Object
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*/
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var options;
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/**
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* options of gauge
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*
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* @property gaugeOptions
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* @type Object
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*/
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var gaugeOptions;
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/**
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* data series
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*
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* @property series
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* @type Array
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*/
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var series;
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/**
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* logger
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*
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* @property logger
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* @type Object
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*/
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var logger;
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/**
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* constructor
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*
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* @class Gauge
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* @constructor
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* @param {Object} gaugeOptions gauge options
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*/
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var Gauge = function(plot, ctx) {
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context = ctx;
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placeholder = plot.getPlaceholder();
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options = plot.getOptions();
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gaugeOptions = options.series.gauges;
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series = plot.getData();
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logger = getLogger(gaugeOptions.debug);
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}
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/**
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* calculate layout
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*
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* @method calculateLayout
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* @return the calculated layout properties
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*/
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Gauge.prototype.calculateLayout = function() {
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var canvasWidth = placeholder.width();
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var canvasHeight = placeholder.height();
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// calculate cell size
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var columns = Math.min(series.length, gaugeOptions.layout.columns);
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var rows = Math.ceil(series.length / columns);
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var margin = gaugeOptions.layout.margin;
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var hMargin = gaugeOptions.layout.hMargin;
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var vMargin = gaugeOptions.layout.vMargin;
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var cellWidth = (canvasWidth - (margin * 2) - (hMargin * (columns - 1))) / columns;
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var cellHeight = (canvasHeight - (margin * 2) - (vMargin * (rows - 1))) / rows;
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if (gaugeOptions.layout.square) {
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var cell = Math.min(cellWidth, cellHeight);
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cellWidth = cell;
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cellHeight = cell;
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}
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// calculate 'auto' values
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calculateAutoValues(gaugeOptions, cellWidth);
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// calculate maximum radius
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var cellMargin = gaugeOptions.cell.margin;
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var labelMargin = 0;
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var labelFontSize = 0;
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if (gaugeOptions.label.show) {
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labelMargin = gaugeOptions.label.margin;
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labelFontSize = gaugeOptions.label.font.size;
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}
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var valueMargin = 0;
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var valueFontSize = 0;
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if (gaugeOptions.value.show) {
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valueMargin = gaugeOptions.value.margin;
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valueFontSize = gaugeOptions.value.font.size;
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}
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var thresholdWidth = 0;
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if (gaugeOptions.threshold.show) {
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thresholdWidth = gaugeOptions.threshold.width;
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}
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var thresholdLabelMargin = 0;
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var thresholdLabelFontSize = 0;
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if (gaugeOptions.threshold.label.show) {
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thresholdLabelMargin = gaugeOptions.threshold.label.margin;
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thresholdLabelFontSize = gaugeOptions.threshold.label.font.size;
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}
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var maxRadiusH = (cellWidth / 2) - cellMargin - thresholdWidth - (thresholdLabelMargin * 2) - thresholdLabelFontSize;
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var startAngle = gaugeOptions.gauge.startAngle;
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var endAngle = gaugeOptions.gauge.endAngle;
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var dAngle = (endAngle - startAngle) / 100;
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var heightRatioV = -1;
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for (var a = startAngle; a < endAngle; a += dAngle) {
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heightRatioV = Math.max(heightRatioV, Math.sin(toRad(a)));
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}
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heightRatioV = Math.max(heightRatioV, Math.sin(toRad(endAngle)));
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var outerRadiusV = (cellHeight - (cellMargin * 2) - (labelMargin * 2) - labelFontSize) / (1 + heightRatioV);
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if (outerRadiusV * heightRatioV < valueMargin + (valueFontSize / 2)) {
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outerRadiusV = cellHeight - (cellMargin * 2) - (labelMargin * 2) - labelFontSize - valueMargin - (valueFontSize / 2);
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}
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var maxRadiusV = outerRadiusV - (thresholdLabelMargin * 2) - thresholdLabelFontSize - thresholdWidth;
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var radius = Math.min(maxRadiusH, maxRadiusV);
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var width = gaugeOptions.gauge.width;
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if (width >= radius) {
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width = Math.max(3, radius / 3);
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}
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var outerRadius = (thresholdLabelMargin * 2) + thresholdLabelFontSize + thresholdWidth + radius;
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var gaugeOuterHeight = Math.max(outerRadius * (1 + heightRatioV), outerRadius + valueMargin + (valueFontSize / 2));
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return {
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canvasWidth: canvasWidth,
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canvasHeight: canvasHeight,
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margin: margin,
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hMargin: hMargin,
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vMargin: vMargin,
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columns: columns,
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rows: rows,
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cellWidth: cellWidth,
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cellHeight: cellHeight,
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cellMargin: cellMargin,
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labelMargin: labelMargin,
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labelFontSize: labelFontSize,
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valueMargin: valueMargin,
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valueFontSize: valueFontSize,
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width: width,
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radius: radius,
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thresholdWidth: thresholdWidth,
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thresholdLabelMargin: thresholdLabelMargin,
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thresholdLabelFontSize: thresholdLabelFontSize,
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gaugeOuterHeight: gaugeOuterHeight
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};
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}
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/**
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* calculate the values which are set as 'auto'
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*
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* @method calculateAutoValues
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* @param {Object} gaugeOptionsi the options of the gauge
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* @param {Number} cellWidth the width of cell
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*/
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function calculateAutoValues(gaugeOptionsi, cellWidth) {
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if (gaugeOptionsi.gauge.width === "auto") {
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gaugeOptionsi.gauge.width = Math.max(5, cellWidth / 8);
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}
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if (gaugeOptionsi.label.margin === "auto") {
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gaugeOptionsi.label.margin = Math.max(1, cellWidth / 20);
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}
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if (gaugeOptionsi.label.font.size === "auto") {
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gaugeOptionsi.label.font.size = Math.max(5, cellWidth / 8);
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}
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if (gaugeOptionsi.value.margin === "auto") {
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gaugeOptionsi.value.margin = Math.max(1, cellWidth / 30);
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}
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if (gaugeOptionsi.value.font.size === "auto") {
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gaugeOptionsi.value.font.size = Math.max(5, cellWidth / 9);
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}
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if (gaugeOptionsi.threshold.width === "auto") {
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gaugeOptionsi.threshold.width = Math.max(3, cellWidth / 100);
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}
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if (gaugeOptionsi.threshold.label.margin === "auto") {
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gaugeOptionsi.threshold.label.margin = Math.max(3, cellWidth / 40);
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}
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if (gaugeOptionsi.threshold.label.font.size === "auto") {
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gaugeOptionsi.threshold.label.font.size = Math.max(5, cellWidth / 15);
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}
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}
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Gauge.prototype.calculateAutoValues = calculateAutoValues;
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/**
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* calculate the layout of the cell inside
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*
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* @method calculateCellLayout
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* @param {Object} gaugeOptionsi the options of the gauge
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* @param {Number} cellWidth the width of cell
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* @param {Number} i the index of the series
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* @return the calculated cell layout properties
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*/
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Gauge.prototype.calculateCellLayout = function(gaugeOptionsi, layout, i) {
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// calculate top, left and center
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var c = col(layout.columns, i);
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var r = row(layout.columns, i);
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var x = layout.margin + (layout.cellWidth + layout.hMargin) * c;
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var y = layout.margin + (layout.cellHeight + layout.vMargin) * r;
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var cx = x + (layout.cellWidth / 2);
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var cy = y + layout.cellMargin + (layout.labelMargin * 2) + layout.labelFontSize + layout.thresholdWidth
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+ layout.thresholdLabelFontSize + (layout.thresholdLabelMargin * 2) + layout.radius;
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var blank = layout.cellHeight - (layout.cellMargin * 2) - (layout.labelMargin * 2) - layout.labelFontSize - layout.gaugeOuterHeight;
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var offsetY = 0;
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if (gaugeOptionsi.cell.vAlign === "middle") {
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offsetY = (blank / 2);
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} else if (gaugeOptionsi.cell.vAlign === "bottom") {
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offsetY = blank;
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}
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cy += offsetY;
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return {
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col: c,
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row: r,
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x: x,
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y: y,
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offsetY: offsetY,
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cellWidth: layout.cellWidth,
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cellHeight: layout.cellHeight,
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cellMargin: layout.cellMargin,
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cx: cx,
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cy: cy
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}
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}
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/**
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* draw the background of chart
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*
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* @method drawBackground
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* @param {Object} layout the layout properties
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*/
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Gauge.prototype.drawBackground = function(layout) {
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if (!gaugeOptions.frame.show) {
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return;
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}
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context.save();
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context.strokeStyle = options.grid.borderColor;
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context.lineWidth = options.grid.borderWidth;
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context.strokeRect(0, 0, layout.canvasWidth, layout.canvasHeight);
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if (options.grid.backgroundColor) {
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context.fillStyle = options.grid.backgroundColor;
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context.fillRect(0, 0, layout.canvasWidth, layout.canvasHeight);
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}
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context.restore();
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}
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/**
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* draw the background of cell
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*
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* @method drawCellBackground
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* @param {Object} gaugeOptionsi the options of the gauge
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* @param {Object} cellLayout the cell layout properties
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*/
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Gauge.prototype.drawCellBackground = function(gaugeOptionsi, cellLayout) {
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context.save();
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if (gaugeOptionsi.cell.border && gaugeOptionsi.cell.border.show && gaugeOptionsi.cell.border.color && gaugeOptionsi.cell.border.width) {
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context.strokeStyle = gaugeOptionsi.cell.border.color;
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context.lineWidth = gaugeOptionsi.cell.border.width;
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context.strokeRect(cellLayout.x, cellLayout.y, cellLayout.cellWidth, cellLayout.cellHeight);
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}
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if (gaugeOptionsi.cell.background && gaugeOptionsi.cell.background.color) {
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context.fillStyle = gaugeOptionsi.cell.background.color;
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context.fillRect(cellLayout.x, cellLayout.y, cellLayout.cellWidth, cellLayout.cellHeight);
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}
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context.restore();
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}
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/**
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* draw the gauge
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*
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* @method drawGauge
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* @param {Object} gaugeOptionsi the options of the gauge
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* @param {Object} layout the layout properties
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* @param {Object} cellLayout the cell layout properties
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* @param {String} label the label of data
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* @param {Number} data the value of the gauge
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*/
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Gauge.prototype.drawGauge = function(gaugeOptionsi, layout, cellLayout, label, data) {
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var blur = gaugeOptionsi.gauge.shadow.show ? gaugeOptionsi.gauge.shadow.blur : 0;
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var color = getColor(gaugeOptionsi, data);
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var angles = calculateAnglesForGauge(gaugeOptionsi, layout, data);
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// draw gauge frame
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drawArcWithShadow(
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cellLayout.cx, // center x
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cellLayout.cy, // center y
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layout.radius,
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layout.width,
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toRad(gaugeOptionsi.gauge.startAngle),
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toRad(gaugeOptionsi.gauge.endAngle),
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gaugeOptionsi.gauge.border.color, // line color
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gaugeOptionsi.gauge.border.width, // line width
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gaugeOptionsi.gauge.background.color, // fill color
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blur);
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// draw gauge
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drawArcWithShadow(
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cellLayout.cx, // center x
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cellLayout.cy, // center y
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layout.radius - 1,
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layout.width - 2,
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toRad(angles.a1),
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toRad(angles.a2),
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color,
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1, // line width
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color, // fill color
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blur);
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if(gaugeOptionsi.gauge.neutralValue != null) {
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drawZeroMarker(gaugeOptionsi, layout, cellLayout, color);
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}
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}
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/**
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* Calcualte the angles for the gauge, depending on if there are
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* negative numbers or not.
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*
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* @method calculateAnglesForGauge
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* @param {Object} gaugeOptionsi the options of the gauge
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* @param {Number} data the value of the gauge
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* @returns {Object}
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*/
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function calculateAnglesForGauge(gaugeOptionsi, layout, data) {
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let angles = {};
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var neutral = gaugeOptionsi.gauge.neutralValue;
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if (neutral != null) {
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if (data < neutral) {
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angles.a1 = calculateAngle(gaugeOptionsi, layout, data);
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angles.a2 = calculateAngle(gaugeOptionsi, layout, neutral);
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} else {
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angles.a1 = calculateAngle(gaugeOptionsi, layout, neutral);
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angles.a2 = calculateAngle(gaugeOptionsi, layout, data);
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}
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} else {
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angles.a1 = gaugeOptionsi.gauge.startAngle;
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angles.a2 = calculateAngle(gaugeOptionsi, layout, data);
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}
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return angles;
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}
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/**
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* Draw zero marker for Gauge with negative values
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*
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* @method drawZeroMarker
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* @param {Object} gaugeOptionsi the options of the gauge
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* @param {Object} layout the layout properties
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* @param {Object} cellLayout the cell layout properties
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* @param {String} color line color
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*/
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function drawZeroMarker(gaugeOptionsi, layout, cellLayout, color) {
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var diff = (gaugeOptionsi.gauge.max - gaugeOptionsi.gauge.min) / 600;
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drawArc(context,
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cellLayout.cx,
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cellLayout.cy,
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layout.radius - 2,
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layout.width - 4,
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toRad(calculateAngle(gaugeOptionsi, layout, gaugeOptionsi.gauge.neutralValue-diff)),
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toRad(calculateAngle(gaugeOptionsi, layout, gaugeOptionsi.gauge.neutralValue+diff)),
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color,
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2,
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gaugeOptionsi.gauge.background.color);
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}
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/**
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* decide the color of the data from the threshold options
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*
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* @method getColor
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* @private
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* @param {Object} gaugeOptionsi the options of the gauge
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* @param {Number} data the value of the gauge
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*/
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function getColor(gaugeOptionsi, data) {
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var color;
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for (var i = 0; i < gaugeOptionsi.threshold.values.length; i++) {
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var threshold = gaugeOptionsi.threshold.values[i];
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color = threshold.color;
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if (data < threshold.value) {
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break;
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}
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}
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return color;
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}
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/**
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* calculate the angle of the data
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*
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* @method calculateAngle
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* @private
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* @param {Object} gaugeOptionsi the options of the gauge
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* @param {Object} layout the layout properties
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* @param {Number} data the value of the gauge
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*/
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function calculateAngle(gaugeOptionsi, layout, data) {
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var a =
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gaugeOptionsi.gauge.startAngle
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+ (gaugeOptionsi.gauge.endAngle - gaugeOptionsi.gauge.startAngle)
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* ((data - gaugeOptionsi.gauge.min) / (gaugeOptionsi.gauge.max - gaugeOptionsi.gauge.min));
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if (a < gaugeOptionsi.gauge.startAngle) {
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a = gaugeOptionsi.gauge.startAngle;
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} else if (a > gaugeOptionsi.gauge.endAngle) {
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a = gaugeOptionsi.gauge.endAngle;
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}
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return a;
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}
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/**
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* draw the arc of the threshold
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*
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* @method drawThreshold
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* @param {Object} gaugeOptionsi the options of the gauge
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* @param {Object} layout the layout properties
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* @param {Object} cellLayout the cell layout properties
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*/
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Gauge.prototype.drawThreshold = function(gaugeOptionsi, layout, cellLayout) {
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var a1 = gaugeOptionsi.gauge.startAngle;
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for (var i = 0; i < gaugeOptionsi.threshold.values.length; i++) {
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var threshold = gaugeOptionsi.threshold.values[i];
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c1 = threshold.color;
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a2 = calculateAngle(gaugeOptionsi, layout, threshold.value);
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drawArc(
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context,
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cellLayout.cx, // center x
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cellLayout.cy, // center y
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layout.radius + layout.thresholdWidth,
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layout.thresholdWidth - 2,
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toRad(a1),
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toRad(a2),
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c1, // line color
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1, // line width
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c1); // fill color
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a1 = a2;
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}
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}
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/**
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* draw an arc with a shadow
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*
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* @method drawArcWithShadow
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* @private
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* @param {Number} cx the x position of the center
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* @param {Number} cy the y position of the center
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* @param {Number} r the radius of an arc
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* @param {Number} w the width of an arc
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* @param {Number} rd1 the start angle of an arc in radians
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* @param {Number} rd2 the end angle of an arc in radians
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* @param {String} lc the color of a line
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* @param {Number} lw the widht of a line
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* @param {String} fc the fill color of an arc
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* @param {Number} blur the shdow blur
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*/
|
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function drawArcWithShadow(cx, cy, r, w, rd1, rd2, lc, lw, fc, blur) {
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||
if (rd1 === rd2) {
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return;
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}
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context.save();
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drawArc(context, cx, cy, r, w, rd1, rd2, lc, lw, fc);
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|
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if (blur) {
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drawArc(context, cx, cy, r, w, rd1, rd2);
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context.clip();
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context.shadowOffsetX = 0;
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||
context.shadowOffsetY = 0;
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context.shadowBlur = 10;
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context.shadowColor = "gray";
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drawArc(context, cx, cy, r + 1, w + 2, rd1, rd2, lc, 1);
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}
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||
context.restore();
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||
}
|
||
|
||
/**
|
||
* draw the label of the gauge
|
||
*
|
||
* @method drawLable
|
||
* @param {Object} gaugeOptionsi the options of the gauge
|
||
* @param {Object} layout the layout properties
|
||
* @param {Object} cellLayout the cell layout properties
|
||
* @param {Number} i the index of the series
|
||
* @param {Object} item the item of the series
|
||
*/
|
||
Gauge.prototype.drawLable = function(gaugeOptionsi, layout, cellLayout, i, item) {
|
||
|
||
drawText(
|
||
cellLayout.cx,
|
||
cellLayout.y + cellLayout.cellMargin + layout.labelMargin + cellLayout.offsetY,
|
||
"flotGaugeLabel" + i,
|
||
gaugeOptionsi.label.formatter ? gaugeOptionsi.label.formatter(item.label, item.data[0][1]) : text,
|
||
gaugeOptionsi.label);
|
||
}
|
||
|
||
/**
|
||
* draw the value of the gauge
|
||
*
|
||
* @method drawValue
|
||
* @param {Object} gaugeOptionsi the options of the gauge
|
||
* @param {Object} layout the layout properties
|
||
* @param {Object} cellLayout the cell layout properties
|
||
* @param {Number} i the index of the series
|
||
* @param {Object} item the item of the series
|
||
*/
|
||
Gauge.prototype.drawValue = function(gaugeOptionsi, layout, cellLayout, i, item) {
|
||
|
||
drawText(
|
||
cellLayout.cx,
|
||
cellLayout.cy - (gaugeOptionsi.value.font.size / 2),
|
||
"flotGaugeValue" + i,
|
||
gaugeOptionsi.value.formatter ? gaugeOptionsi.value.formatter(item.label, item.data[0][1]) : text,
|
||
gaugeOptionsi.value);
|
||
}
|
||
|
||
/**
|
||
* draw the values of the threshold
|
||
*
|
||
* @method drawThresholdValues
|
||
* @param {Object} gaugeOptionsi the options of the gauge
|
||
* @param {Object} layout the layout properties
|
||
* @param {Object} cellLayout the cell layout properties
|
||
* @param {Number} i the index of the series
|
||
*/
|
||
Gauge.prototype.drawThresholdValues = function(gaugeOptionsi, layout, cellLayout, i) {
|
||
|
||
// min, max
|
||
drawThresholdValue(gaugeOptionsi, layout, cellLayout, "Min" + i, gaugeOptionsi.gauge.min, gaugeOptionsi.gauge.startAngle);
|
||
drawThresholdValue(gaugeOptionsi, layout, cellLayout, "Max" + i, gaugeOptionsi.gauge.max, gaugeOptionsi.gauge.endAngle);
|
||
// threshold values
|
||
for (var j = 0; j < gaugeOptionsi.threshold.values.length; j++) {
|
||
var threshold = gaugeOptionsi.threshold.values[j];
|
||
if (threshold.value > gaugeOptionsi.gauge.min && threshold.value < gaugeOptionsi.gauge.max) {
|
||
var a = calculateAngle(gaugeOptionsi, layout, threshold.value);
|
||
drawThresholdValue(gaugeOptionsi, layout, cellLayout, i + "_" + j, threshold.value, a);
|
||
}
|
||
}
|
||
|
||
var neutral = gaugeOptionsi.gauge.neutralValue;
|
||
if (neutral != null &&
|
||
neutral>gaugeOptionsi.gauge.min &&
|
||
neutral<gaugeOptionsi.gauge.max) {
|
||
drawThresholdValue(gaugeOptionsi, layout, cellLayout, "Neutral" + i, neutral, calculateAngle(gaugeOptionsi, layout, neutral));
|
||
}
|
||
}
|
||
|
||
/**
|
||
* draw the value of the threshold
|
||
*
|
||
* @method drawThresholdValue
|
||
* @param {Object} gaugeOptionsi the options of the gauge
|
||
* @param {Object} layout the layout properties
|
||
* @param {Object} cellLayout the cell layout properties
|
||
* @param {Number} i the index of the series
|
||
* @param {Number} value the value of the threshold
|
||
* @param {Number} a the angle of the value drawn
|
||
*/
|
||
function drawThresholdValue(gaugeOptionsi, layout, cellLayout, i, value, a) {
|
||
drawText(
|
||
cellLayout.cx
|
||
+ ((layout.thresholdLabelMargin + (layout.thresholdLabelFontSize / 2) + layout.radius)
|
||
* Math.cos(toRad(a))),
|
||
cellLayout.cy
|
||
+ ((layout.thresholdLabelMargin + (layout.thresholdLabelFontSize / 2) + layout.radius)
|
||
* Math.sin(toRad(a))),
|
||
"flotGaugeThresholdValue" + i,
|
||
gaugeOptionsi.threshold.label.formatter ? gaugeOptionsi.threshold.label.formatter(value) : value,
|
||
gaugeOptionsi.threshold.label,
|
||
a);
|
||
}
|
||
|
||
/**
|
||
* draw a text
|
||
*
|
||
* the textOptions is assumed as follows:
|
||
*
|
||
* textOptions: {
|
||
* background: {
|
||
* color: null,
|
||
* opacity: 0
|
||
* },
|
||
* font: {
|
||
* size: "auto"
|
||
* family: "\"ＭＳ ゴシック\",sans-serif"
|
||
* },
|
||
* color: null
|
||
* }
|
||
*
|
||
* @method drawText
|
||
* @private
|
||
* @param {Number} x the x position of the text drawn (left top)
|
||
* @param {Number} y the y position of the text drawn (left top)
|
||
* @param {String} id the id of the dom element
|
||
* @param {String} text the text drawn
|
||
* @param {Object} textOptions the option of the text
|
||
* @param {Number} [a] the angle of the value drawn
|
||
*/
|
||
function drawText(x, y, id, text, textOptions, a) {
|
||
var span = $(placeholder).find("#" + id);
|
||
var exists = span.length;
|
||
if (!exists) {
|
||
span = $("<span></span>")
|
||
span.attr("id", id);
|
||
span.attr("class", "flot-temp-elem");
|
||
placeholder.append(span);
|
||
}
|
||
|
||
span.css("position", "absolute");
|
||
span.css("top", y + "px");
|
||
span.css("white-space", "nowrap");
|
||
|
||
if (textOptions.font.size) {
|
||
span.css("font-size", textOptions.font.size + "px");
|
||
}
|
||
if (textOptions.font.family) {
|
||
span.css("font-family", textOptions.font.family);
|
||
}
|
||
if (textOptions.color) {
|
||
span.css("color", textOptions.color);
|
||
}
|
||
if (textOptions.background.color) {
|
||
span.css("background-color", textOptions.background.color);
|
||
}
|
||
if (textOptions.background.opacity) {
|
||
span.css("opacity", textOptions.background.opacity);
|
||
}
|
||
span.text(text);
|
||
// after append, readjust the left position
|
||
span.css("left", x + "px"); // for redraw, resetting the left position is needed here
|
||
span.css("left", (parseInt(span.css("left")) - (span.width()/ 2)) + "px");
|
||
|
||
// at last, set angle
|
||
if (!exists && a) {
|
||
span.css("top", (parseInt(span.css("top")) - (span.height()/ 2)) + "px");
|
||
span.css("transform", "rotate(" + ((180 * a) + 90) + "deg)"); // not supported for ie8
|
||
}
|
||
}
|
||
|
||
return Gauge;
|
||
})();
|
||
/**
|
||
* get a instance of Logger
|
||
*
|
||
* @method getLogger
|
||
* @for flot.gauge
|
||
* @private
|
||
* @param {Object} debugOptions the options of debug
|
||
*/
|
||
function getLogger(debugOptions) {
|
||
return typeof Logger !== "undefined" ? new Logger(debugOptions) : null;
|
||
}
|
||
|
||
/**
|
||
* calculate the index of columns for the specified data
|
||
*
|
||
* @method col
|
||
* @for flot.gauge
|
||
* @param {Number} columns the number of columns
|
||
* @param {Number} i the index of the series
|
||
* @return the index of columns
|
||
*/
|
||
function col(columns, i) {
|
||
return i % columns;
|
||
}
|
||
|
||
/**
|
||
* calculate the index of rows for the specified data
|
||
*
|
||
* @method row
|
||
* @for flot.gauge
|
||
* @param {Number} columns the number of rows
|
||
* @param {Number} i the index of the series
|
||
* @return the index of rows
|
||
*/
|
||
function row(columns, i) {
|
||
return Math.floor(i / columns);
|
||
}
|
||
|
||
/**
|
||
* calculate the angle in radians
|
||
*
|
||
* internally, use a number without PI (0 - 2).
|
||
* so, in this function, multiply PI
|
||
*
|
||
* @method toRad
|
||
* @for flot.gauge
|
||
* @param {Number} a the number of angle without PI
|
||
* @return the angle in radians
|
||
*/
|
||
function toRad(a) {
|
||
return a * Math.PI;
|
||
}
|
||
|
||
/**
|
||
* draw an arc
|
||
*
|
||
* @method drawArc
|
||
* @for flot.gauge
|
||
* @param {Object} context the context of canvas
|
||
* @param {Number} cx the x position of the center
|
||
* @param {Number} cy the y position of the center
|
||
* @param {Number} r the radius of an arc
|
||
* @param {Number} w the width of an arc
|
||
* @param {Number} rd1 the start angle of an arc in radians
|
||
* @param {Number} rd2 the end angle of an arc in radians
|
||
* @param {String} lc the color of a line
|
||
* @param {Number} lw the widht of a line
|
||
* @param {String} fc the fill color of an arc
|
||
*/
|
||
function drawArc(context, cx, cy, r, w, rd1, rd2, lc, lw, fc) {
|
||
if (rd1 === rd2) {
|
||
return;
|
||
}
|
||
var counterClockwise = false;
|
||
context.save();
|
||
context.beginPath();
|
||
context.arc(cx, cy, r, rd1, rd2, counterClockwise);
|
||
context.lineTo(cx + (r - w) * Math.cos(rd2),
|
||
cy + (r - w) * Math.sin(rd2));
|
||
context.arc(cx, cy, r - w, rd2, rd1, !counterClockwise);
|
||
context.closePath();
|
||
if (lw) {
|
||
context.lineWidth = lw;
|
||
}
|
||
if (lc) {
|
||
context.strokeStyle = lc;
|
||
context.stroke();
|
||
}
|
||
if (fc) {
|
||
context.fillStyle = fc;
|
||
context.fill();
|
||
}
|
||
context.restore();
|
||
}
|
||
|
||
/**
|
||
* initialize plugin
|
||
*
|
||
* @method init
|
||
* @for flot.gauge
|
||
* @private
|
||
* @param {Object} plot a instance of plot
|
||
*/
|
||
function init (plot) {
|
||
// add processOptions hook
|
||
plot.hooks.processOptions.push(function(plot, options) {
|
||
var logger = getLogger(options.series.gauges.debug);
|
||
|
||
|
||
|
||
|
||
// turn 'grid' and 'legend' off
|
||
if (options.series.gauges.show) {
|
||
options.grid.show = false;
|
||
options.legend.show = false;
|
||
}
|
||
|
||
// sort threshold
|
||
var thresholds = options.series.gauges.threshold.values;
|
||
|
||
thresholds.sort(function(a, b) {
|
||
if (a.value < b.value) {
|
||
return -1;
|
||
} else if (a.value > b.value) {
|
||
return 1;
|
||
} else {
|
||
return 0;
|
||
}
|
||
});
|
||
|
||
|
||
|
||
});
|
||
|
||
// add draw hook
|
||
plot.hooks.draw.push(function(plot, context) {
|
||
var options = plot.getOptions();
|
||
var gaugeOptions = options.series.gauges;
|
||
|
||
var logger = getLogger(gaugeOptions.debug);
|
||
|
||
|
||
if (!gaugeOptions.show) {
|
||
return;
|
||
}
|
||
|
||
var series = plot.getData();
|
||
|
||
if (!series || !series.length) {
|
||
return; // if no series were passed
|
||
}
|
||
|
||
var gauge = new Gauge(plot, context);
|
||
|
||
// calculate layout
|
||
var layout = gauge.calculateLayout();
|
||
|
||
// debug layout
|
||
if (gaugeOptions.debug.layout) {
|
||
|
||
}
|
||
|
||
// draw background
|
||
gauge.drawBackground(layout)
|
||
|
||
// draw cells (label, gauge, value, threshold)
|
||
for (var i = 0; i < series.length; i++) {
|
||
var item = series[i];
|
||
|
||
var gaugeOptionsi = $.extend({}, gaugeOptions, item.gauges);
|
||
if (item.gauges) {
|
||
// re-calculate 'auto' values
|
||
gauge.calculateAutoValues(gaugeOptionsi, layout.cellWidth);
|
||
}
|
||
|
||
// calculate cell layout
|
||
var cellLayout = gauge.calculateCellLayout(gaugeOptionsi, layout, i);
|
||
|
||
// draw cell background
|
||
gauge.drawCellBackground(gaugeOptionsi, cellLayout)
|
||
// debug layout
|
||
if (gaugeOptionsi.debug.layout) {
|
||
|
||
}
|
||
// draw label
|
||
if (gaugeOptionsi.label.show) {
|
||
gauge.drawLable(gaugeOptionsi, layout, cellLayout, i, item);
|
||
}
|
||
// draw gauge
|
||
gauge.drawGauge(gaugeOptionsi, layout, cellLayout, item.label, item.data[0][1]);
|
||
// draw threshold
|
||
if (gaugeOptionsi.threshold.show) {
|
||
gauge.drawThreshold(gaugeOptionsi, layout, cellLayout);
|
||
}
|
||
if (gaugeOptionsi.threshold.label.show) {
|
||
gauge.drawThresholdValues(gaugeOptionsi, layout, cellLayout, i)
|
||
}
|
||
// draw value
|
||
if (gaugeOptionsi.value.show) {
|
||
gauge.drawValue(gaugeOptionsi, layout, cellLayout, i, item);
|
||
}
|
||
}
|
||
});
|
||
}
|
||
|
||
/**
|
||
* [defaults description]
|
||
*
|
||
* @property defaults
|
||
* @type {Object}
|
||
*/
|
||
var defaults = {
|
||
series: {
|
||
gauges: {
|
||
debug: {
|
||
log: false,
|
||
layout: false,
|
||
alert: false
|
||
},
|
||
show: false,
|
||
layout: {
|
||
margin: 5,
|
||
columns: 3,
|
||
hMargin: 5,
|
||
vMargin: 5,
|
||
square: false
|
||
},
|
||
frame: {
|
||
show: true
|
||
},
|
||
cell: {
|
||
background: {
|
||
color: null
|
||
},
|
||
border: {
|
||
show: true,
|
||
color: "black",
|
||
width: 1
|
||
},
|
||
margin: 5,
|
||
vAlign: "middle" // 'top' or 'middle' or 'bottom'
|
||
},
|
||
gauge: {
|
||
width: "auto", // a specified number, or 'auto'
|
||
startAngle: 0.9, // 0 - 2 factor of the radians
|
||
endAngle: 2.1, // 0 - 2 factor of the radians
|
||
min: 0,
|
||
max: 100,
|
||
background: {
|
||
color: "white"
|
||
},
|
||
border: {
|
||
color: "lightgray",
|
||
width: 2
|
||
},
|
||
shadow: {
|
||
show: true,
|
||
blur: 5
|
||
}
|
||
},
|
||
label: {
|
||
show: true,
|
||
margin: "auto", // a specified number, or 'auto'
|
||
background: {
|
||
color: null,
|
||
opacity: 0
|
||
},
|
||
font: {
|
||
size: "auto", // a specified number, or 'auto'
|
||
family: "sans-serif"
|
||
},
|
||
color: null,
|
||
formatter: function(label, value) {
|
||
return label;
|
||
}
|
||
},
|
||
value: {
|
||
show: true,
|
||
margin: "auto", // a specified number, or 'auto'
|
||
background: {
|
||
color: null,
|
||
opacity: 0
|
||
},
|
||
font: {
|
||
size: "auto", // a specified number, or 'auto'
|
||
family: "sans-serif"
|
||
},
|
||
color: null,
|
||
formatter: function(label, value) {
|
||
return parseInt(value);
|
||
}
|
||
},
|
||
threshold: {
|
||
show: true,
|
||
width: "auto", // a specified number, or 'auto'
|
||
label: {
|
||
show: true,
|
||
margin: "auto", // a specified number, or 'auto'
|
||
background: {
|
||
color: null,
|
||
opacity: 0
|
||
},
|
||
font: {
|
||
size: "auto", // a specified number, or 'auto'
|
||
family: ",sans-serif"
|
||
},
|
||
color: null,
|
||
formatter: function(value) {
|
||
return value;
|
||
}
|
||
},
|
||
values: [
|
||
|
||
]
|
||
}
|
||
}
|
||
}
|
||
};
|
||
|
||
// register the gauge plugin
|
||
$.plot.plugins.push({
|
||
init: init,
|
||
options: defaults,
|
||
name: "gauge",
|
||
version: "1.1.0"
|
||
});
|
||
|
||
})(jQuery);
|
||
|