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1242 lines
44 KiB
JavaScript
1242 lines
44 KiB
JavaScript
// version: 2015-11-02
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/**
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* o--------------------------------------------------------------------------------o
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* | This file is part of the RGraph package - you can learn more at: |
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* | |
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* | http://www.rgraph.net |
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* | |
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* | RGraph is dual licensed under the Open Source GPL (General Public License) |
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* | v2.0 license and a commercial license which means that you're not bound by |
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* | the terms of the GPL. The commercial license is just £99 (GBP) and you can |
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* | read about it here: |
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* | http://www.rgraph.net/license |
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* o--------------------------------------------------------------------------------o
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*/
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RGraph = window.RGraph || {isRGraph: true};
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/**
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* The bar chart constructor
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*
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* @param string canvas The canvas ID
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* @param min integer The minimum value
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* @param max integer The maximum value
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* @param value integer The indicated value
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*/
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RGraph.Meter = function (conf)
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{
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/**
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* Allow for object config style
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*/
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if ( typeof conf === 'object'
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&& typeof conf.min === 'number'
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&& typeof conf.max === 'number'
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&& typeof conf.value !== 'undefined'
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&& typeof conf.id === 'string') {
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var id = conf.id
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var canvas = document.getElementById(id);
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var min = conf.min;
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var max = conf.max;
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var value = conf.value;
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var parseConfObjectForOptions = true; // Set this so the config is parsed (at the end of the constructor)
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} else {
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var id = conf;
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var canvas = document.getElementById(id);
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var min = arguments[1];
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var max = arguments[2];
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var value = arguments[3];
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}
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// id, min, max, value
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// Get the canvas and context objects
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this.id = id;
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this.canvas = canvas;
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this.context = this.canvas.getContext ? this.canvas.getContext("2d", {alpha: (typeof id === 'object' && id.alpha === false) ? false : true}) : null;
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this.canvas.__object__ = this;
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this.type = 'meter';
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this.min = min;
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this.max = max;
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this.value = RGraph.stringsToNumbers(value);
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this.centerx = null;
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this.centery = null;
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this.radius = null;
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this.isRGraph = true;
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this.currentValue = null;
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this.uid = RGraph.CreateUID();
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this.canvas.uid = this.canvas.uid ? this.canvas.uid : RGraph.CreateUID();
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this.colorsParsed = false;
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this.coordsText = [];
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this.original_colors = [];
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this.firstDraw = true; // After the first draw this will be false
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/**
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* Compatibility with older browsers
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*/
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//RGraph.OldBrowserCompat(this.context);
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// Various config type stuff
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this.properties =
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{
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'chart.background.image.url': null,
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'chart.background.image.offsetx': 0,
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'chart.background.image.offsety': 0,
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'chart.background.image.stretch': true,
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'chart.background.color': 'white',
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'chart.gutter.left': 15,
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'chart.gutter.right': 15,
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'chart.gutter.top': 15,
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'chart.gutter.bottom': 20,
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'chart.linewidth': 1,
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'chart.linewidth.segments': 0,
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'chart.strokestyle': null,
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'chart.border': true,
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'chart.border.color': 'black',
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'chart.text.font': 'Arial',
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'chart.text.size': 12,
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'chart.text.color': 'black',
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'chart.text.valign': 'center',
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'chart.value.text.decimals': 0,
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'chart.value.text.units.pre': '',
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'chart.value.text.units.post': '',
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'chart.title': '',
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'chart.title.background': null,
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'chart.title.hpos': null,
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'chart.title.vpos': null,
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'chart.title.color': 'black',
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'chart.title.bold': true,
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'chart.title.font': null,
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'chart.title.x': null,
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'chart.title.y': null,
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'chart.title.halign': null,
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'chart.title.valign': null,
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'chart.green.start': ((this.max - this.min) * 0.35) + this.min,
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'chart.green.end': this.max,
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'chart.green.color': '#207A20',
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'chart.yellow.start': ((this.max - this.min) * 0.1) + this.min,
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'chart.yellow.end': ((this.max - this.min) * 0.35) + this.min,
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'chart.yellow.color': '#D0AC41',
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'chart.red.start': this.min,
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'chart.red.end': ((this.max - this.min) * 0.1) + this.min,
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'chart.red.color': '#9E1E1E',
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'chart.colors.ranges': null,
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'chart.units.pre': '',
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'chart.units.post': '',
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'chart.contextmenu': null,
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'chart.zoom.factor': 1.5,
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'chart.zoom.fade.in': true,
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'chart.zoom.fade.out': true,
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'chart.zoom.hdir': 'right',
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'chart.zoom.vdir': 'down',
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'chart.zoom.frames': 25,
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'chart.zoom.delay': 16.666,
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'chart.zoom.shadow': true,
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'chart.zoom.background': true,
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'chart.zoom.action': 'zoom',
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'chart.annotatable': false,
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'chart.annotate.color': 'black',
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'chart.shadow': false,
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'chart.shadow.color': 'rgba(0,0,0,0.5)',
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'chart.shadow.blur': 3,
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'chart.shadow.offsetx': 3,
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'chart.shadow.offsety': 3,
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'chart.resizable': false,
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'chart.resize.handle.adjust': [0,0],
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'chart.resize.handle.background': null,
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'chart.tickmarks.small.num': 100,
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'chart.tickmarks.big.num': 10,
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'chart.tickmarks.small.color': '#bbb',
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'chart.tickmarks.big.color': 'black',
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'chart.scale.decimals': 0,
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'chart.scale.point': '.',
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'chart.scale.thousand': ',',
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'chart.radius': null,
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'chart.centerx': null,
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'chart.centery': null,
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'chart.labels': true,
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'chart.labels.count': 10,
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'chart.segment.radius.start': 0,
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'chart.needle.radius': null,
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'chart.needle.tail': false,
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'chart.needle.head': true,
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'chart.needle.color': 'black',
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'chart.needle.image.url': null,
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'chart.needle.image.offsetx': 0,
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'chart.needle.image.offsety': 0,
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'chart.adjustable': false,
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'chart.angles.start': RGraph.PI,
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'chart.angles.end': RGraph.TWOPI,
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'chart.centerpin.stroke': 'black',
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'chart.centerpin.fill': 'white'
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}
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// Check for support
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if (!this.canvas) {
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alert('[METER] No canvas support');
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return;
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}
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/*
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* Translate half a pixel for antialiasing purposes - but only if it hasn't beeen
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* done already
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*/
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if (!this.canvas.__rgraph_aa_translated__) {
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this.context.translate(0.5,0.5);
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this.canvas.__rgraph_aa_translated__ = true;
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}
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// Short variable names
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var RG = RGraph,
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ca = this.canvas,
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co = ca.getContext('2d'),
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prop = this.properties,
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pa = RG.Path,
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pa2 = RG.path2,
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win = window,
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doc = document,
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ma = Math
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/**
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* "Decorate" the object with the generic effects if the effects library has been included
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*/
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if (RG.Effects && typeof RG.Effects.decorate === 'function') {
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RG.Effects.decorate(this);
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}
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/**
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* A setter
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*
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* @param name string The name of the property to set
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* @param value mixed The value of the property
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*/
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this.set =
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this.Set = function (name)
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{
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var value = arguments[1] || null;
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/**
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* the number of arguments is only one and it's an
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* object - parse it for configuration data and return.
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*/
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if (arguments.length === 1 && typeof name === 'object') {
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RG.parseObjectStyleConfig(this, name);
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return this;
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}
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/**
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* This should be done first - prepend the propertyy name with "chart." if necessary
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*/
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if (name.substr(0,6) != 'chart.') {
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name = 'chart.' + name;
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}
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// Convert uppercase letters to dot+lower case letter
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name = name.replace(/([A-Z])/g, function (str)
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{
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return '.' + String(RegExp.$1).toLowerCase();
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});
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if (name == 'chart.value') {
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this.value = value;
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return;
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}
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prop[name] = value;
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return this;
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};
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/**
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* A getter
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*
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* @param name string The name of the property to get
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*/
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this.get =
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this.Get = function (name)
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{
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/**
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* This should be done first - prepend the property name with "chart." if necessary
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*/
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if (name.substr(0,6) != 'chart.') {
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name = 'chart.' + name;
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}
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// Convert uppercase letters to dot+lower case letter
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name = name.replace(/([A-Z])/g, function (str)
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{
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return '.' + String(RegExp.$1).toLowerCase()
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});
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if (name == 'chart.value') {
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return this.value;
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}
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return prop[name];
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};
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/**
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* The function you call to draw the bar chart
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*/
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this.draw =
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this.Draw = function ()
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{
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/**
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* Fire the onbeforedraw event
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*/
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RG.FireCustomEvent(this, 'onbeforedraw');
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/**
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* Constrain the value to be within the min and max
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*/
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if (this.value > this.max) this.value = this.max;
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if (this.value < this.min) this.value = this.min;
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/**
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* Set the current value
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*/
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this.currentValue = this.value;
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/**
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* This is new in May 2011 and facilitates indiviual gutter settings,
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* eg chart.gutter.left
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*/
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this.gutterLeft = prop['chart.gutter.left'];
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this.gutterRight = prop['chart.gutter.right'];
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this.gutterTop = prop['chart.gutter.top'];
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this.gutterBottom = prop['chart.gutter.bottom'];
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this.centerx = ((ca.width - this.gutterLeft - this.gutterRight) / 2) + this.gutterLeft;
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this.centery = ca.height - this.gutterBottom;
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this.radius = Math.min(
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(ca.width - this.gutterLeft - this.gutterRight) / 2,
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(ca.height - this.gutterTop - this.gutterBottom)
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);
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/**
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* Stop this growing uncontrollably
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*/
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this.coordsText = [];
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/**
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* Custom centerx, centery and radius
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*/
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if (typeof(prop['chart.centerx']) == 'number') this.centerx = prop['chart.centerx'];
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if (typeof(prop['chart.centery']) == 'number') this.centery = prop['chart.centery'];
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if (typeof(prop['chart.radius']) == 'number') this.radius = prop['chart.radius'];
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/**
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* Parse the colors for gradients. Its down here so that the center X/Y can be used
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*/
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if (!this.colorsParsed) {
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this.parseColors();
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// Don't want to do this again
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this.colorsParsed = true;
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}
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this.drawBackground();
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this.drawLabels();
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this.drawNeedle();
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this.drawReadout();
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/**
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* Draw the title
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*/
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RG.DrawTitle(this, prop['chart.title'], this.gutterTop, null, prop['chart.title.size'] ? prop['chart.title.size'] : prop['chart.text.size'] + 2);
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/**
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* Setup the context menu if required
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*/
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if (prop['chart.contextmenu']) {
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RG.ShowContext(this);
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}
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/**
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* This function enables resizing
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*/
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if (prop['chart.resizable']) {
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RG.AllowResizing(this);
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}
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/**
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* This installs the event listeners
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*/
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RG.InstallEventListeners(this);
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/**
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* Fire the onfirstdraw event
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*/
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if (this.firstDraw) {
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RG.fireCustomEvent(this, 'onfirstdraw');
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this.firstDraw = false;
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this.firstDrawFunc();
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}
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/**
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* Fire the RGraph ondraw event
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*/
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RG.FireCustomEvent(this, 'ondraw');
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return this;
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};
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/**
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* Used in chaining. Runs a function there and then - not waiting for
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* the events to fire (eg the onbeforedraw event)
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*
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* @param function func The function to execute
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*/
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this.exec = function (func)
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{
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func(this);
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return this;
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};
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/**
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* Draws the background of the chart
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*/
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this.drawBackground =
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this.DrawBackground = function ()
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{
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/**
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* First draw the background image if it's defined
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*/
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if (typeof prop['chart.background.image.url'] === 'string' && !this.__background_image__) {
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var x = 0 + prop['chart.background.image.offsetx'];
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var y = 0 + prop['chart.background.image.offsety'];
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var img = new Image();
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this.__background_image__ = img;
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img.src = prop['chart.background.image.url'];
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img.onload = function ()
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{
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if (prop['chart.background.image.stretch']) {
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co.drawImage(this, x,y,ca.width, ca.height);
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} else {
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co.drawImage(this, x,y);
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}
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RG.redraw();
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}
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} else if (this.__background_image__) {
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var x = 0 + prop['chart.background.image.offsetx'];
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var y = 0 + prop['chart.background.image.offsety'];
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if (prop['chart.background.image.stretch']) {
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co.drawImage(this.__background_image__, x,y,ca.width, ca.height);
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} else {
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co.drawImage(this.__background_image__, x,y);
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}
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}
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/**
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* Draw the white background
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*/
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co.beginPath();
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co.fillStyle = prop['chart.background.color'];
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if (prop['chart.shadow']) {
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RG.SetShadow(this, prop['chart.shadow.color'],prop['chart.shadow.offsetx'],prop['chart.shadow.offsety'], prop['chart.shadow.blur']);
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}
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co.moveTo(this.centerx,this.centery);
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co.arc(this.centerx,
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this.centery,
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this.radius,
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prop['chart.angles.start'],
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prop['chart.angles.end'],
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false);
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co.fill();
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RG.NoShadow(this);
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// Draw the shadow
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if (prop['chart.shadow']) {
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co.beginPath();
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var r = (this.radius * 0.06) > 40 ? 40 : (this.radius * 0.06);
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co.arc(this.centerx, this.centery, r, 0, RG.TWOPI, 0);
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co.fill();
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RG.NoShadow(this);
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}
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// First, draw the grey tickmarks
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if (prop['chart.tickmarks.small.num']) {
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for (var i=0; i<(prop['chart.angles.end'] - prop['chart.angles.start']); i+=(RG.PI / prop['chart.tickmarks.small.num'])) {
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co.beginPath();
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co.strokeStyle = prop['chart.tickmarks.small.color'];
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co.arc(this.centerx, this.centery, this.radius, prop['chart.angles.start'] + i, prop['chart.angles.start'] + i + 0.00001, 0);
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co.arc(this.centerx, this.centery, this.radius - 5, prop['chart.angles.start'] + i, prop['chart.angles.start'] + i + 0.00001, 0);
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co.stroke();
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}
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// Draw the semi-circle that makes the tickmarks
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co.beginPath();
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co.fillStyle = prop['chart.background.color'];
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co.arc(this.centerx, this.centery, this.radius - 4, prop['chart.angles.start'], prop['chart.angles.end'], false);
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co.closePath();
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co.fill();
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}
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// Second, draw the darker tickmarks. First run draws them in white to get rid of the existing tickmark,
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// then the second run draws them in the requested color
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if (prop['chart.tickmarks.big.num']) {
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var colors = ['white','white',prop['chart.tickmarks.big.color']];
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for (var j=0; j<colors.length; ++j) {
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for (var i=0; i<(prop['chart.angles.end'] - prop['chart.angles.start']); i+=((prop['chart.angles.end'] - prop['chart.angles.start']) / prop['chart.tickmarks.big.num'])) {
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co.beginPath();
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co.strokeStyle = colors[j];
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co.arc(this.centerx, this.centery, this.radius, prop['chart.angles.start'] + i, prop['chart.angles.start'] + i + 0.001, 0);
|
|
co.arc(this.centerx, this.centery, this.radius - 5, prop['chart.angles.start'] + i, prop['chart.angles.start'] + i + 0.0001, 0);
|
|
co.stroke();
|
|
}
|
|
}
|
|
}
|
|
|
|
// Draw the white circle that makes the tickmarks
|
|
co.beginPath();
|
|
co.fillStyle = prop['chart.background.color'];
|
|
co.moveTo(this.centerx, this.centery);
|
|
co.arc(this.centerx, this.centery, this.radius - 7, prop['chart.angles.start'], prop['chart.angles.end'], false);
|
|
co.closePath();
|
|
co.fill();
|
|
|
|
/**
|
|
* Color ranges - either green/yellow/red or an arbitrary number of ranges
|
|
*/
|
|
var ranges = prop['chart.colors.ranges'];
|
|
|
|
if (RG.is_array(prop['chart.colors.ranges'])) {
|
|
|
|
var ranges = prop['chart.colors.ranges'];
|
|
|
|
for (var i=0; i<ranges.length; ++i) {
|
|
|
|
co.strokeStyle = prop['chart.strokestyle'] ? prop['chart.strokestyle'] : ranges[i][2];
|
|
co.fillStyle = ranges[i][2];
|
|
co.lineWidth = prop['chart.linewidth.segments'];
|
|
|
|
co.beginPath();
|
|
co.arc(this.centerx,
|
|
this.centery,
|
|
this.radius * 0.85,
|
|
(((ranges[i][0] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
(((ranges[i][1] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
false);
|
|
|
|
if (prop['chart.segment.radius.start'] > 0) {
|
|
co.arc(this.centerx,
|
|
this.centery,
|
|
prop['chart.segment.radius.start'],
|
|
(((ranges[i][1] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
(((ranges[i][0] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
true);
|
|
} else {
|
|
co.lineTo(this.centerx, this.centery);
|
|
}
|
|
|
|
co.closePath();
|
|
co.stroke();
|
|
co.fill();
|
|
}
|
|
|
|
// Stops the last line from being changed to a big linewidth.
|
|
co.beginPath();
|
|
|
|
} else {
|
|
co.lineWidth = prop['chart.linewidth'];
|
|
|
|
// Draw the green area
|
|
co.strokeStyle = prop['chart.strokestyle'] ? prop['chart.strokestyle'] : prop['chart.green.color'];
|
|
co.fillStyle = prop['chart.green.color'];
|
|
co.lineWidth = prop['chart.linewidth.segments'];
|
|
|
|
co.beginPath();
|
|
co.arc(this.centerx,
|
|
this.centery,
|
|
this.radius * 0.85,
|
|
(((prop['chart.green.start'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - this.properties['chart.angles.start'])) + prop['chart.angles.start'],
|
|
(((prop['chart.green.end'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
false);
|
|
|
|
if (prop['chart.segment.radius.start'] > 0) {
|
|
|
|
co.arc(this.centerx,
|
|
this.centery,
|
|
prop['chart.segment.radius.start'],
|
|
(((prop['chart.green.end'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
(((prop['chart.green.start'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
true);
|
|
} else {
|
|
co.lineTo(this.centerx, this.centery);
|
|
}
|
|
|
|
co.closePath();
|
|
co.stroke();
|
|
co.fill();
|
|
|
|
// Draw the yellow area
|
|
co.strokeStyle = prop['chart.strokestyle'] ? prop['chart.strokestyle'] : prop['chart.yellow.color'];
|
|
co.fillStyle = prop['chart.yellow.color'];
|
|
co.lineWidth = prop['chart.linewidth.segments'];
|
|
co.beginPath();
|
|
co.arc(this.centerx,
|
|
this.centery,
|
|
this.radius * 0.85,
|
|
(((prop['chart.yellow.start'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
(((prop['chart.yellow.end'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
false);
|
|
|
|
if (prop['chart.segment.radius.start'] > 0) {
|
|
co.arc(this.centerx,
|
|
this.centery,
|
|
prop['chart.segment.radius.start'],
|
|
(((prop['chart.yellow.end'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
(((prop['chart.yellow.start'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
true);
|
|
} else {
|
|
co.lineTo(this.centerx, this.centery);
|
|
}
|
|
|
|
co.closePath();
|
|
co.stroke();
|
|
co.fill();
|
|
|
|
// Draw the red area
|
|
co.strokeStyle = prop['chart.strokestyle'] ? prop['chart.strokestyle'] : prop['chart.red.color'];
|
|
co.fillStyle = prop['chart.red.color'];
|
|
co.lineWidth = prop['chart.linewidth.segments'];
|
|
|
|
co.beginPath();
|
|
co.arc(this.centerx,
|
|
this.centery,this.radius * 0.85,
|
|
(((prop['chart.red.start'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
(((prop['chart.red.end'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
false);
|
|
|
|
if (prop['chart.segment.radius.start'] > 0) {
|
|
co.arc(this.centerx,
|
|
this.centery,
|
|
prop['chart.segment.radius.start'],
|
|
(((prop['chart.red.end'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
(((prop['chart.red.start'] - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'],
|
|
true);
|
|
} else {
|
|
co.lineTo(this.centerx, this.centery);
|
|
}
|
|
|
|
co.closePath();
|
|
co.stroke();
|
|
co.fill();
|
|
|
|
// Revert the linewidth
|
|
co.lineWidth = 1;
|
|
}
|
|
|
|
// Draw the outline
|
|
if (prop['chart.border']) {
|
|
co.strokeStyle = prop['chart.border.color'];
|
|
co.lineWidth = prop['chart.linewidth'];
|
|
|
|
co.beginPath();
|
|
co.moveTo(this.centerx, this.centery);
|
|
co.arc(this.centerx,
|
|
this.centery,
|
|
this.radius,
|
|
prop['chart.angles.start'],
|
|
prop['chart.angles.end'],
|
|
false);
|
|
co.closePath();
|
|
}
|
|
|
|
co.stroke();
|
|
|
|
// Reset the linewidth back to 1
|
|
co.lineWidth = 1;
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Draws the pointer
|
|
*/
|
|
this.drawNeedle =
|
|
this.DrawNeedle = function ()
|
|
{
|
|
/**
|
|
* The angle that the needle is at
|
|
*/
|
|
var a = (((this.value - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'];
|
|
|
|
/**
|
|
* First draw the background image if it's defined
|
|
*/
|
|
if (typeof prop['chart.needle.image.url'] === 'string' && !this.__needle_image__) {
|
|
|
|
var img = new Image();
|
|
|
|
this.__needle_image__ = img;
|
|
img.src = prop['chart.needle.image.url'];
|
|
|
|
img.onload = function ()
|
|
{
|
|
co.save();
|
|
RG.rotateCanvas(ca, this.centerx, this.centery, a);
|
|
co.drawImage(this,
|
|
this.centerx + prop['chart.needle.image.offsetx'],
|
|
this.centery + prop['chart.needle.image.offsety']);
|
|
co.restore();
|
|
|
|
RG.redraw();
|
|
}
|
|
|
|
} else if (this.__needle_image__) {
|
|
|
|
co.save();
|
|
RG.rotateCanvas(ca, this.centerx, this.centery, a);
|
|
co.drawImage(this.__needle_image__,
|
|
this.centerx + prop['chart.needle.image.offsetx'],
|
|
this.centery + prop['chart.needle.image.offsety']);
|
|
//pa(co, ['b', 'r', this.centerx, this.centery, 1, 1, 'f', 'red']);
|
|
co.restore();
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Allow customising the needle radius
|
|
var needleRadius = typeof(prop['chart.needle.radius']) == 'number' ? prop['chart.needle.radius'] : this.radius * 0.7;
|
|
|
|
// First draw the circle at the bottom
|
|
co.fillStyle = 'black';
|
|
co.lineWidth = this.radius >= 200 ? 7 : 3;
|
|
co.lineCap = 'round';
|
|
|
|
// Now, draw the arm of the needle
|
|
co.beginPath();
|
|
co.strokeStyle = prop['chart.needle.color'];
|
|
if (typeof(prop['chart.needle.linewidth']) == 'number') co.lineWidth = prop['chart.needle.linewidth'];
|
|
|
|
|
|
co.arc(this.centerx, this.centery, needleRadius, a, a + 0.001, false);
|
|
co.lineTo(this.centerx, this.centery);
|
|
co.stroke();
|
|
|
|
// Draw the triangular needle head
|
|
if (prop['chart.needle.head']) {
|
|
|
|
co.fillStyle = prop['chart.needle.color'];
|
|
co.beginPath();
|
|
co.lineWidth = 1;
|
|
//co.moveTo(this.centerx, this.centery);
|
|
co.arc(this.centerx, this.centery, needleRadius + 15, a, a + 0.001, 0);
|
|
co.arc(this.centerx, this.centery, needleRadius - 15, a + 0.087, a + 0.087999, 0);
|
|
co.arc(this.centerx, this.centery, needleRadius - 15, a - 0.087, a - 0.087999, 1);
|
|
co.fill();
|
|
}
|
|
|
|
// Draw the tail if requested
|
|
if (prop['chart.needle.tail']) {
|
|
co.beginPath();
|
|
co.strokeStyle = prop['chart.needle.color'];
|
|
if (typeof(prop['chart.needle.linewidth']) == 'number') co.lineWidth = prop['chart.needle.linewidth'];
|
|
|
|
var a = ((this.value - this.min) / (this.max - this.min) * (this.properties['chart.angles.end'] - this.properties['chart.angles.start'])) + this.properties['chart.angles.start'] + RG.PI;
|
|
co.arc(this.centerx, this.centery, 25, a, a + 0.001, false);
|
|
co.lineTo(this.centerx, this.centery);
|
|
co.stroke();
|
|
}
|
|
|
|
// Draw the center circle (the stroke)
|
|
var r = (this.radius * 0.06) > 40 ? 40 : (this.radius * 0.06);
|
|
|
|
co.beginPath();
|
|
co.fillStyle = prop['chart.centerpin.stroke'];
|
|
co.arc(this.centerx, this.centery, r, 0 + 0.001, RG.TWOPI, 0);
|
|
co.fill();
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
// Draw the centre bit of the circle (the fill)
|
|
co.fillStyle = prop['chart.centerpin.fill'];
|
|
co.beginPath();
|
|
co.arc(this.centerx, this.centery, r - 2, 0 + 0.001, RG.TWOPI, 0);
|
|
co.fill();
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Draws the labels
|
|
*/
|
|
this.drawLabels =
|
|
this.DrawLabels = function ()
|
|
{
|
|
if (!prop['chart.labels']) {
|
|
return;
|
|
}
|
|
|
|
var radius = this.radius;
|
|
var text_size = prop['chart.text.size'];
|
|
var text_font = prop['chart.text.font'];
|
|
var units_post = prop['chart.units.post'];
|
|
var units_pre = prop['chart.units.pre'];
|
|
var centerx = this.centerx;
|
|
var centery = this.centery;
|
|
var min = this.min;
|
|
var max = this.max;
|
|
var decimals = prop['chart.scale.decimals'];
|
|
var numLabels = prop['chart.labels.count'];
|
|
|
|
co.fillStyle = prop['chart.text.color'];
|
|
co.lineWidth = 1;
|
|
|
|
co.beginPath();
|
|
|
|
for (var i=0; i<=numLabels; ++i) {
|
|
|
|
var angle = ((prop['chart.angles.end'] - prop['chart.angles.start']) * (i / numLabels)) + prop['chart.angles.start'];
|
|
var coords = RG.getRadiusEndPoint(centerx, centery, angle + (((i == 0 || i == numLabels) && prop['chart.border']) ? (i == 0 ? 0.05 : -0.05) : 0), (this.radius * 0.925) - (prop['chart.text.valign'] === 'bottom' ? 15 : 0));
|
|
|
|
var angleStart = prop['chart.angles.start'];
|
|
var angleEnd = prop['chart.angles.end'];
|
|
var angleRange = angleEnd - angleStart;
|
|
|
|
var angleStart_degrees = angleStart * (180 / RG.PI);
|
|
var angleEnd_degrees = angleEnd * (180 / RG.PI);
|
|
var angleRange_degrees = angleRange * (180 / RG.PI);
|
|
|
|
// Vertical alignment
|
|
valign = prop['chart.text.valign'];
|
|
|
|
// Horizontal alignment
|
|
if (prop['chart.border']) {
|
|
if (i == 0) {
|
|
halign = 'left';
|
|
} else if (i == numLabels) {
|
|
halign = 'right';
|
|
} else {
|
|
halign = 'center'
|
|
}
|
|
} else {
|
|
halign = 'center';
|
|
}
|
|
|
|
RG.Text2(this, {'font':text_font,
|
|
'size':text_size,
|
|
'x':coords[0],
|
|
'y':coords[1],
|
|
'text':RG.numberFormat(this, (((this.max - this.min) * (i / numLabels)) + this.min).toFixed(decimals),units_pre,units_post),
|
|
'halign':halign,
|
|
'valign':valign,
|
|
'angle':((angleRange_degrees * (1 / numLabels) * i) + angleStart_degrees) - 270,
|
|
'bounding':false,
|
|
'boundingFill':(i == 0 || i == numLabels) ? 'white': null,
|
|
'tag': 'scale'
|
|
});
|
|
}
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* This function draws the text readout if specified
|
|
*/
|
|
this.drawReadout =
|
|
this.DrawReadout = function ()
|
|
{
|
|
if (prop['chart.value.text']) {
|
|
co.beginPath();
|
|
co.fillStyle = prop['chart.text.color'];
|
|
RG.Text2(this, {'font':prop['chart.text.font'],
|
|
'size':prop['chart.text.size'],
|
|
'x':this.centerx,
|
|
'y':this.centery - prop['chart.text.size'] - 15,
|
|
'text': prop['chart.value.text.units.pre'] + (this.value).toFixed(prop['chart.value.text.decimals']) + prop['chart.value.text.units.post'],
|
|
'halign':'center',
|
|
'valign':'bottom',
|
|
'bounding':true,
|
|
'boundingFill':'white',
|
|
'tag': 'value.text'
|
|
});
|
|
|
|
co.stroke();
|
|
co.fill();
|
|
}
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* A placeholder function
|
|
*
|
|
* @param object The event object
|
|
*/
|
|
this.getShape = function (e) {};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* This function returns the pertinent value for a particular click (or other mouse event)
|
|
*
|
|
* @param obj e The event object
|
|
*/
|
|
this.getValue = function (e)
|
|
{
|
|
var mouseXY = RG.getMouseXY(e);
|
|
var angle = RG.getAngleByXY(this.centerx, this.centery, mouseXY[0], mouseXY[1]);
|
|
|
|
// Work out the radius
|
|
var radius = RG.getHypLength(this.centerx, this.centery, mouseXY[0], mouseXY[1]);
|
|
if (radius > this.radius) {
|
|
return null;
|
|
}
|
|
|
|
|
|
if (angle < RG.HALFPI) {
|
|
angle += RG.TWOPI;
|
|
}
|
|
|
|
var value = (((angle - prop['chart.angles.start']) / (prop['chart.angles.end'] - prop['chart.angles.start'])) * (this.max - this.min)) + this.min;
|
|
|
|
value = Math.max(value, this.min);
|
|
value = Math.min(value, this.max);
|
|
|
|
return value;
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* The getObjectByXY() worker method. Don't call this call:
|
|
*
|
|
* RGraph.ObjectRegistry.getObjectByXY(e)
|
|
*
|
|
* @param object e The event object
|
|
*/
|
|
this.getObjectByXY = function (e)
|
|
{
|
|
var mouseXY = RGraph.getMouseXY(e);
|
|
|
|
// Work out the radius
|
|
var radius = RG.getHypLength(this.centerx, this.centery, mouseXY[0], mouseXY[1]);
|
|
|
|
if (
|
|
mouseXY[0] > (this.centerx - this.radius)
|
|
&& mouseXY[0] < (this.centerx + this.radius)
|
|
&& mouseXY[1] > (this.centery - this.radius)
|
|
&& mouseXY[1] < (this.centery + this.radius)
|
|
&& radius <= this.radius
|
|
) {
|
|
|
|
return this;
|
|
}
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* This method handles the adjusting calculation for when the mouse is moved
|
|
*
|
|
* @param object e The event object
|
|
*/
|
|
this.adjusting_mousemove =
|
|
this.Adjusting_mousemove = function (e)
|
|
{
|
|
/**
|
|
* Handle adjusting for the Bar
|
|
*/
|
|
if (prop['chart.adjustable'] && RG.Registry.Get('chart.adjusting') && RG.Registry.Get('chart.adjusting').uid == this.uid) {
|
|
this.value = this.getValue(e);
|
|
RG.clear(this.canvas);
|
|
RG.redrawCanvas(this.canvas);
|
|
RG.fireCustomEvent(this, 'onadjust');
|
|
}
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* This method returns the appropriate angle for a value
|
|
*
|
|
* @param number value The value
|
|
*/
|
|
this.getAngle = function (value)
|
|
{
|
|
// Higher than max
|
|
if (value > this.max || value < this.min) {
|
|
return null;
|
|
}
|
|
|
|
var angle = (((value - this.min) / (this.max - this.min)) * (prop['chart.angles.end'] - prop['chart.angles.start'])) + prop['chart.angles.start'];
|
|
|
|
return angle;
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* This allows for easy specification of gradients
|
|
*/
|
|
this.parseColors = function ()
|
|
{
|
|
// Save the original colors so that they can be restored when the canvas is reset
|
|
if (this.original_colors.length === 0) {
|
|
this.original_colors['chart.green.color'] = RG.array_clone(prop['chart.green.color']);
|
|
this.original_colors['chart.yellow.color'] = RG.array_clone(prop['chart.yellow.color']);
|
|
this.original_colors['chart.red.color'] = RG.array_clone(prop['chart.red.color']);
|
|
this.original_colors['chart.colors.ranges'] = RG.array_clone(prop['chart.colors.ranges']);
|
|
}
|
|
|
|
// Parse the basic colors
|
|
prop['chart.green.color'] = this.parseSingleColorForGradient(prop['chart.green.color']);
|
|
prop['chart.yellow.color'] = this.parseSingleColorForGradient(prop['chart.yellow.color']);
|
|
prop['chart.red.color'] = this.parseSingleColorForGradient(prop['chart.red.color']);
|
|
|
|
// Parse chart.colors.ranges
|
|
var ranges = prop['chart.colors.ranges'];
|
|
if (ranges && ranges.length) {
|
|
for (var i=0; i<ranges.length; ++i) {
|
|
ranges[i][2] = this.parseSingleColorForGradient(ranges[i][2]);
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Use this function to reset the object to the post-constructor state. Eg reset colors if
|
|
* need be etc
|
|
*/
|
|
this.reset = function ()
|
|
{
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* This parses a single color value
|
|
*/
|
|
this.parseSingleColorForGradient = function (color)
|
|
{
|
|
if (!color || typeof(color) != 'string') {
|
|
return color;
|
|
}
|
|
|
|
if (color.match(/^gradient\((.*)\)$/i)) {
|
|
|
|
var parts = RegExp.$1.split(':');
|
|
|
|
// Create the gradient
|
|
var grad = co.createRadialGradient(this.centerx, this.centery, prop['chart.segment.radius.start'], this.centerx, this.centery, this.radius * 0.85);
|
|
|
|
var diff = 1 / (parts.length - 1);
|
|
|
|
for (var j=0; j<parts.length; ++j) {
|
|
grad.addColorStop(j * diff, RG.trim(parts[j]));
|
|
}
|
|
}
|
|
|
|
return grad ? grad : color;
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Using a function to add events makes it easier to facilitate method chaining
|
|
*
|
|
* @param string type The type of even to add
|
|
* @param function func
|
|
*/
|
|
this.on = function (type, func)
|
|
{
|
|
if (type.substr(0,2) !== 'on') {
|
|
type = 'on' + type;
|
|
}
|
|
|
|
this[type] = func;
|
|
|
|
return this;
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* This function runs once only
|
|
* (put at the end of the file (before any effects))
|
|
*/
|
|
this.firstDrawFunc = function ()
|
|
{
|
|
};
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Meter Grow
|
|
*
|
|
* This effect gradually increases the represented value
|
|
*
|
|
* @param An object of options - eg: {frames: 60}
|
|
* @param function An optional callback function
|
|
*/
|
|
this.grow = function ()
|
|
{
|
|
var obj = this;
|
|
|
|
obj.currentValue = obj.currentValue || obj.min;
|
|
|
|
var opt = arguments[0] || {};
|
|
var frames = opt.frames || 30;
|
|
var frame = 0;
|
|
var diff = obj.value - obj.currentValue;
|
|
var step = diff / frames;
|
|
var callback = arguments[1] || function () {};
|
|
var initial = obj.currentValue;
|
|
|
|
|
|
|
|
function iterator ()
|
|
{
|
|
obj.value = initial + (frame++ * step);
|
|
|
|
RG.clear(obj.canvas);
|
|
RG.redrawCanvas(obj.canvas);
|
|
|
|
if (frame <= frames) {
|
|
RG.Effects.updateCanvas(iterator);
|
|
} else {
|
|
callback(obj);
|
|
}
|
|
}
|
|
|
|
iterator();
|
|
|
|
return this;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
RG.att(ca);
|
|
|
|
|
|
|
|
|
|
/**
|
|
* Register the object
|
|
*/
|
|
RG.register(this);
|
|
|
|
|
|
|
|
|
|
/**
|
|
* This is the 'end' of the constructor so if the first argument
|
|
* contains configuration data - handle that.
|
|
*/
|
|
if (parseConfObjectForOptions) {
|
|
RG.parseObjectStyleConfig(this, conf.options);
|
|
}
|
|
}; |