dojox/dgauges/components/default/CircularLinearGauge.js

Dojo eXtensions, a rollup of many useful sub-projects and varying states of maturity – from very stable and robust, to alpha and experimental. See individual projects contain README files for details.

define([
		"dojo/_base/lang", 
		"dojo/_base/declare", 
		"dojo/_base/Color", 
		"../utils",
		"../../CircularGauge", 
		"../../LinearScaler", 
		"../../CircularScale", 
		"../../CircularValueIndicator",
		"../../TextIndicator",
		"../DefaultPropertiesMixin"
	], 
	function(lang, declare, Color, utils, CircularGauge, LinearScaler, CircularScale, CircularValueIndicator, TextIndicator, DefaultPropertiesMixin){
	return declare("dojox.dgauges.components.default.CircularLinearGauge", [CircularGauge, DefaultPropertiesMixin], {
		// summary:
		//		A circular gauge widget.

		// _radius: Number
		_radius: 100,
		// borderColor: Object|Array|int
		//		The border color. Default is "#C9DFF2".
		borderColor: "#C9DFF2",
		// fillColor: Object|Array|int
		//		The background color. Default is "#FCFCFF".
		fillColor: "#FCFCFF",
		// indicatorColor: Object|Array|int
		//		The indicator fill color. Default is "#F01E28".
		indicatorColor: "#F01E28",
		constructor: function(){
			
			// Base colors
			this.borderColor = new Color(this.borderColor);
			this.fillColor = new Color(this.fillColor);
			this.indicatorColor = new Color(this.indicatorColor);

			// Draw background
			this.addElement("background", lang.hitch(this, this.drawBackground));
			
			// Scaler
			var scaler = new LinearScaler();
			
			// Scale
			var scale = new CircularScale();
			scale.set("scaler", scaler);
			this.addElement("scale", scale);
			
			// Value indicator
			var indicator = new CircularValueIndicator();
			scale.addIndicator("indicator", indicator);
			
			// Gauge Foreground (needle cap)
			this.addElement("foreground", lang.hitch(this, this.drawForeground));
			
			// Indicator Text
			var indicatorText = new TextIndicator();
			indicatorText.set("indicator", indicator);
			indicatorText.set("x", 100);
			indicatorText.set("y", 150);
			this.addElement("indicatorText", indicatorText);
			
			utils.genericCircularGauge(scale, indicator, this._radius, this._radius, 0.65 * this._radius, 130, 50, null, null, "outside");
		},
		
		drawBackground: function(g){
			// summary:
			//		Draws the background shape of the gauge.
			// g: dojox/gfx/Group
			//		The group used to draw the background. 
			// tags:
			//		protected
			var r = this._radius;
			var w = 2 * r;
			var h = w;
			var entries = utils.createGradient([0, utils.brightness(this.borderColor, 70), 1, utils.brightness(this.borderColor, -40)]);
			g.createEllipse({
				cx: r,
				cy: r,
				rx: r,
				ry: r
			}).setFill(lang.mixin({
				type: "linear",
				x1: w,
				y1: 0,
				x2: 0,
				y2: h
			}, entries)).setStroke({
				color: "#A5A5A5",
				width: 0.2
			});
			
			entries = utils.createGradient([0, utils.brightness(this.borderColor, 70), 1, utils.brightness(this.borderColor, -50)]);
			g.createEllipse({
				cx: r,
				cy: r,
				rx: r * 0.99,
				ry: r * 0.99
			}).setFill(lang.mixin({
				type: "linear",
				x1: 0,
				y1: 0,
				x2: w,
				y2: h
			}, entries));
			
			entries = utils.createGradient([0, utils.brightness(this.borderColor, 60), 1, utils.brightness(this.borderColor, -40)]);
			g.createEllipse({
				cx: r,
				cy: r,
				rx: r * 0.92,
				ry: r * 0.92
			}).setFill(lang.mixin({
				type: "linear",
				x1: 0,
				y1: 0,
				x2: w,
				y2: h
			}, entries));
			
			entries = utils.createGradient([0, utils.brightness(this.borderColor, 70), 1, utils.brightness(this.borderColor, -40)]);
			g.createEllipse({
				cx: r,
				cy: r,
				rx: r * 0.9,
				ry: r * 0.9
			}).setFill(lang.mixin({
				type: "linear",
				x1: w,
				y1: 0,
				x2: 0,
				y2: h
			}, entries));
			
			entries = utils.createGradient([0, [255, 255, 255, 220], 0.8, utils.brightness(this.fillColor, -5), 1, utils.brightness(this.fillColor, -30)]);
			g.createEllipse({
				cx: r,
				cy: r,
				rx: r * 0.9,
				ry: r * 0.9
			}).setFill(lang.mixin({
				type: "radial",
				cx: r,
				cy: r,
				r: r
			}, entries)).setStroke({
				color: utils.brightness(this.fillColor, -40),
				width: 0.4
			});
			
		},
		
		drawForeground: function(g){
			// summary:
			//		Draws the foreground shape of the gauge.
			// g: dojox/gfx/Group
			//		The group used to draw the foreground. 
			// tags:
			//		protected
			var r = 0.07 * this._radius;
			var entries = utils.createGradient([0, this.borderColor, 1, utils.brightness(this.borderColor, -20)]);
			g.createEllipse({
				cx: this._radius,
				cy: this._radius,
				rx: r,
				ry: r
			}).setFill(lang.mixin({
				type: "radial",
				cx: 0.96 * this._radius,
				cy: 0.96 * this._radius,
				r: r
			}, entries)).setStroke({
				color: utils.brightness(this.fillColor, -50),
				width: 0.4
			});
		}
	});
});