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Java example source code file (ChartStackedArea.ts)

This example Java source code file (ChartStackedArea.ts) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

chartstackedarea, jquery, margin, ordinal, renderable, stylechart, styletext

The ChartStackedArea.ts Java example source code

/*
 *
 *  * Copyright 2016 Skymind,Inc.
 *  *
 *  *    Licensed under the Apache License, Version 2.0 (the "License");
 *  *    you may not use this file except in compliance with the License.
 *  *    You may obtain a copy of the License at
 *  *
 *  *        http://www.apache.org/licenses/LICENSE-2.0
 *  *
 *  *    Unless required by applicable law or agreed to in writing, software
 *  *    distributed under the License is distributed on an "AS IS" BASIS,
 *  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  *    See the License for the specific language governing permissions and
 *  *    limitations under the License.
 *
 */
/// <reference path="../../api/Component.ts" />
/// <reference path="../../api/Renderable.ts" />
/// <reference path="../../typedefs/d3.d.ts" />
/// <reference path="../../util/TSUtils.ts" />
/// <reference path="Chart.ts" />
/// <reference path="Legend.ts" />


class ChartStackedArea extends Chart implements Renderable {
    private xData: number[];
    private yData: number[][];
    private labels: string[];

    constructor(jsonStr: string){
        super(ComponentType.ChartStackedArea, jsonStr);

        var json = JSON.parse(jsonStr);
        if(!json["componentType"]) json = json[ComponentType[ComponentType.ChartStackedArea]];


        this.xData = json['x'];
        this.yData = json['y'];
        this.labels = json['labels'];
    }


    render = (appendToObject: JQuery) => {

        var nSeries: number = (!this.xData ? 0 : this.xData.length);
        var s: StyleChart = this.getStyle();
        var margin: Margin = Style.getMargins(s);

        // Set the ranges
        var xScale: d3.scale.Linear<number,number> = d3.scale.linear().range([0, margin.widthExMargins]);
        var yScale: d3.scale.Linear<number,number> = d3.scale.linear().range([margin.heightExMargins, 0]);

        // Define the axes
        var xAxis = d3.svg.axis().scale(xScale)
            .orient("bottom").ticks(5);
        if(this.gridVerticalStrokeWidth != null && this.gridVerticalStrokeWidth > 0){
            xAxis.innerTickSize(-margin.heightExMargins);     //used as grid line
        }


        var yAxis = d3.svg.axis().scale(yScale)
            .orient("left").ticks(5);
        if(this.gridHorizontalStrokeWidth != null && this.gridHorizontalStrokeWidth > 0){
            yAxis.innerTickSize(-margin.widthExMargins);      //used as grid line
        }

        if(this.suppressAxisHorizontal === true) xAxis.tickValues([]);

        if(this.suppressAxisVertical === true) yAxis.tickValues([]);

        var data: any[] = [];
        for(var i=0; i<this.xData.length; i++ ){
            var obj = {};
            for( var j=0; j<this.labels.length; j++ ){
                obj[this.labels[j]] = this.yData[j][i];
                obj['xValue'] = this.xData[i];
            }
            data.push(obj);
        }

        var area = d3.svg.area()
            .x(function(d: any) { return xScale(d.xValue); })
            .y0(function(d: any) { return yScale(d.y0); })
            .y1(function(d: any) { return yScale(d.y0 + d.y); });

        var stack = d3.layout.stack()
            .values(function(d: any) { return d.values; });

        var svg = d3.select("#" + appendToObject.attr("id")).append("svg")
            .attr("width", margin.widthExMargins + margin.left + margin.right)
            .attr("height", margin.heightExMargins + margin.top + margin.bottom)
            .append("g")
            .attr("transform", "translate(" + margin.left + "," + margin.top + ")");

        var color: any = d3.scale.category20();
        color.domain(d3.keys(data[0]).filter(function (key) {
            return key !== "xValue";
        }));

        var browsers = stack(color.domain().map(function (name) {
            return {
                name: name,
                values: data.map(function (d) {
                    return {xValue: d.xValue, y: d[name] * 1};
                })
            };
        }));

        // Find the value of the day with highest total value
        var maxX = d3.max(data, function (d) {
            var vals = d3.keys(d).map(function (key) {
                return key !== "xValue" ? d[key] : 0
            });
            return d3.sum(vals);
        });

        // Set domains for axes
        xScale.domain(d3.extent(data, function (d) {
            return d.xValue;
        }));

        yScale.domain([0, maxX]);

        var browser = svg.selectAll(".browser")
            .data(browsers)
            .enter().append("g")
            .attr("class", "browser");

        var tempLabels = this.labels;

        var defaultColor: Ordinal<string,string> = d3.scale.category20();
        browser.append("path")
            .attr("class", "area")
            .attr("data-legend",function(d: any) { return d.name})
            .attr("d", function (d: any) {
                return area(d.values);
            })
            .style("fill", function(d: any){
                if(s && s.getSeriesColor(tempLabels.indexOf(d.name))){
                    return s.getSeriesColor(tempLabels.indexOf(d.name));
                } else{
                    return defaultColor(String(tempLabels.indexOf(d.name)))
                }
            })
            .style({"stroke-width": "0px"});

        //Add the x axis:
        var xAxisNode = svg.append("g")
            .attr("class", "x axis")
            .style("stroke","#000")
            .style("stroke-width", (s != null && s.getAxisStrokeWidth() != null ? s.getAxisStrokeWidth() : ChartConstants.DEFAULT_AXIS_STROKE_WIDTH))
            .style("fill","none")
            .attr("transform", "translate(0," + margin.heightExMargins + ")")
            .call(xAxis);
        xAxisNode.selectAll('text').style("stroke-width",0).style("fill","#000000");

        //Add the y axis
        var yAxisNode = svg.append("g")
            .attr("class", "y axis")
            .style("stroke","#000")
            .style("stroke-width", (s != null && s.getAxisStrokeWidth() != null ? s.getAxisStrokeWidth() : ChartConstants.DEFAULT_AXIS_STROKE_WIDTH))
            .style("fill","none")
            .call(yAxis);
        yAxisNode.selectAll('text').style("stroke-width",0).style("fill","#000000");

        //Add title (if present)
        if (this.title) {
            var titleStyle: StyleText;
            if(this.style) titleStyle = this.style.getTitleStyle();
            Chart.appendTitle(svg, this.title, margin, titleStyle);
        }

        //Append the legend
        var legend: any = svg.append("g")
            .attr("class","legend")
            .attr("transform","translate(40,40)")
            .style("font-size","12px")
            .call(Legend.legendFn);
    }
}

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