source: Dev/trunk/src/client/dojox/dgauges/components/default/HorizontalLinearGauge.js

define([
                "dojo/_base/lang", 
                "dojo/_base/declare",
                "dojo/_base/Color", 
                "../utils",
                "../../RectangularGauge", 
                "../../LinearScaler", 
                "../../RectangularScale", 
                "../../RectangularValueIndicator", 
                "../../TextIndicator",
                "../DefaultPropertiesMixin"
        ], 
        function(lang, declare, Color, utils, RectangularGauge, LinearScaler, RectangularScale, RectangularValueIndicator, TextIndicator, DefaultPropertiesMixin){
        return declare("dojox.dgauges.components.default.HorizontalLinearGauge", [RectangularGauge, DefaultPropertiesMixin], {
                // summary:
                //              A horizontal gauge widget.

                // 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 RectangularScale();
                        scale.set("scaler", scaler);
                        scale.set("labelPosition", "trailing");
                        scale.set("paddingTop", 15);
                        scale.set("paddingRight", 23);
                        
                        this.addElement("scale", scale);
                        
                        // Value indicator
                        var indicator = new RectangularValueIndicator();                        
                        indicator.indicatorShapeFunc = lang.hitch(this, function(group){
                                var indic = group.createPolyline([0, 0, 10, 0, 0, 10, -10, 0, 0, 0]).setStroke({
                                        color: "blue",
                                        width: 0.25
                                }).setFill(this.indicatorColor);
                                
                                return indic;
                        });
                        indicator.set("paddingTop", 5);
                        indicator.set("interactionArea", "gauge");
                        scale.addIndicator("indicator", indicator);
                        
                        // Indicator Text Border
                        this.addElement("indicatorTextBorder", lang.hitch(this, this.drawTextBorder), "leading");
                        
                        // Indicator Text
                        var indicatorText = new TextIndicator();
                        indicatorText.set("indicator", indicator);
                        indicatorText.set("x", 32.5);
                        indicatorText.set("y", 30);
                        this.addElement("indicatorText", indicatorText);

                },
                
                drawBackground: function(g, w, h){
                        // summary:
                        //              Draws the background shape of the gauge.
                        // g: dojox/gfx/Group
                        //              The group used to draw the background. 
                        // w: Number
                        //              The width of the gauge.
                        // h: Number
                        //              The height of the gauge.
                        // tags:
                        //              protected
                        h = 49;
                        var gap = 0;
                        var cr = 3;
                        var entries = utils.createGradient([0, utils.brightness(this.borderColor, -20), 0.1, utils.brightness(this.borderColor, -40)]);
                        g.createRect({
                                x: 0,
                                y: 0,
                                width: w,
                                height: h,
                                r: cr
                        }).setFill(lang.mixin({
                                type: "linear",
                                x1: 0,
                                y1: 0,
                                x2: w,
                                y2: h
                        }, entries)).setStroke({
                                color: "#A5A5A5",
                                width: 0.2
                        });
                        entries = utils.createGradient([0, utils.brightness(this.borderColor, 70), 1, utils.brightness(this.borderColor, -50)]);
                        gap = 4;
                        cr = 2
                        g.createRect({
                                x: gap,
                                y: gap,
                                width: w - 2 * gap,
                                height: h - 2 * gap,
                                r: cr
                        }).setFill(lang.mixin({
                                type: "linear",
                                x1: 0,
                                y1: 0,
                                x2: w,
                                y2: h
                        }, entries));
                        gap = 6;
                        cr = 1
                        entries = utils.createGradient([0, utils.brightness(this.borderColor, 60), 1, utils.brightness(this.borderColor, -40)]);
                        g.createRect({
                                x: gap,
                                y: gap,
                                width: w - 2 * gap,
                                height: h - 2 * gap,
                                r: cr
                        }).setFill(lang.mixin({
                                type: "linear",
                                x1: 0,
                                y1: 0,
                                x2: w,
                                y2: h
                        }, entries));
                        
                        gap = 7;
                        cr = 0
                        entries = utils.createGradient([0, utils.brightness(this.borderColor, 70), 1, utils.brightness(this.borderColor, -40)]);
                        g.createRect({
                                x: gap,
                                y: gap,
                                width: w - 2 * gap,
                                height: h - 2 * gap,
                                r: cr
                        }).setFill(lang.mixin({
                                type: "linear",
                                x1: w,
                                y1: 0,
                                x2: 0,
                                y2: h
                        }, entries));
                        gap = 5;
                        cr = 0
                        entries = utils.createGradient([0, [255, 255, 255, 220], 0.8, utils.brightness(this.fillColor, -5), 1, utils.brightness(this.fillColor, -30)]);
                        g.createRect({
                                x: gap,
                                y: gap,
                                width: w - 2 * gap,
                                height: h - 2 * gap,
                                r: cr
                        }).setFill(lang.mixin({
                                type: "radial",
                                cx: w / 2,
                                cy: 0,
                                r: w
                        }, entries)).setStroke({
                                color: utils.brightness(this.fillColor, -40),
                                width: 0.4
                        });
                        
                },
                drawTextBorder: function(g){
                        // summary:
                        //              Internal method.
                        // tags:
                        //              private
                        return g.createRect({
                                x: 5,
                                y: 5,
                                width: 60,
                                height: 39
                        }).setStroke({
                                color: "#CECECE",
                                width: 1
                        });
                }
        });
});