source: Dev/trunk/src/client/dojox/charting/plot2d/commonStacked.js

define([
        "dojo/_base/lang",
        "./common"
], function(lang, common){
        
        var commonStacked = lang.getObject("dojox.charting.plot2d.commonStacked", true);
        return lang.mixin(commonStacked, {
                collectStats: function(series){
                        var stats = lang.delegate(common.defaultStats);
                        for(var i = 0; i < series.length; ++i){
                                var run = series[i];
                                for(var j = 0; j < run.data.length; j++){
                                        var x, y;
                                        if(run.data[j] !== null){
                                                if(typeof run.data[j] == "number" || !run.data[j].hasOwnProperty("x")){
                                                        y = commonStacked.getIndexValue(series, i, j)[0];
                                                        x = j+1;
                                                }else{
                                                        x = run.data[j].x;
                                                        if(x !== null){
                                                                y = commonStacked.getValue(series, i, x)[0];
                                                                y = y != null && y.y ? y.y:null; 
                                                        }
                                                }
                                                stats.hmin = Math.min(stats.hmin, x);
                                                stats.hmax = Math.max(stats.hmax, x);
                                                stats.vmin = Math.min(stats.vmin, y);
                                                stats.vmax = Math.max(stats.vmax, y);
                                        }
                                }
                        }
                        return stats;
                },
                getIndexValue: function(series, i, index){
                        var value = 0, v, j, pvalue;
                        for(j = 0; j <= i; ++j){
                                pvalue = value;
                                v = series[j].data[index];
                                if(v != null){
                                        if(isNaN(v)){ v = v.y || 0; }
                                        value += v;
                                }
                        }
                        return [value , pvalue];
                },
                getValue: function(series, i, x){
                        var value = null, j, z, v, pvalue;
                        for(j = 0; j <= i; ++j){
                                for(z = 0; z < series[j].data.length; z++){
                                        pvalue = value;
                                        v = series[j].data[z];
                                        if(v !== null){
                                                if(v.x == x){
                                                        if(!value){
                                                                value = {x: x};
                                                        }
                                                        if(v.y != null){
                                                                if(value.y == null){
                                                                        value.y = 0;
                                                                }
                                                                value.y += v.y;
                                                        }
                                                        break;
                                                }else if(v.x > x){break;}
                                        }
                                }
                        }
                        return [value, pvalue];
                }
        });
});