ch.zhaw.init.walj.projectmanagement.util.chart.GanttChart.java Source code

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Here is the source code for ch.zhaw.init.walj.projectmanagement.util.chart.GanttChart.java

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/*
Copyright 2016-2017 Zuercher Hochschule fuer Angewandte Wissenschaften
All Rights Reserved.
    
   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.
 */

package ch.zhaw.init.walj.projectmanagement.util.chart;

import java.awt.Color;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartUtilities;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.CategoryPlot;
import org.jfree.chart.renderer.category.CategoryItemRenderer;
import org.jfree.data.category.IntervalCategoryDataset;
import org.jfree.data.gantt.TaskSeries;
import org.jfree.data.gantt.TaskSeriesCollection;
import org.jfree.data.time.SimpleTimePeriod;

import ch.zhaw.init.walj.projectmanagement.util.dbclasses.Project;
import ch.zhaw.init.walj.projectmanagement.util.dbclasses.Workpackage;

/**
 * creates a gantt chart with data from a given project
 * 
 * @author Janine Walther, ZHAW
 *
 */
public class GanttChart {

    // variable declaration
    private final Project project;
    private final ArrayList<Workpackage> workpackages;
    private final ArrayList<ch.zhaw.init.walj.projectmanagement.util.dbclasses.Task> tasks;
    private final String path;
    private int nbrOfObjects;

    /**
     * Constructor of the GanttChart class
     * @param project the project for which the chart should be created
     * @param path path where PMSaaS is located
     */
    public GanttChart(Project project, String path) {
        this.project = project;
        workpackages = project.getWorkpackages();
        tasks = project.getTasks();
        this.path = path;
        nbrOfObjects = 0;
    }

    /**
     * create a dataset with all tasks and workpackages
     * @return dataset with dates from tasks and workpackages
     */
    private IntervalCategoryDataset createDataset() {
        // create new task series
        TaskSeries taskSeries = new TaskSeries("Scheduled");

        // add a new task to the task series for every workpackage and every project task
        for (Workpackage w : workpackages) {
            taskSeries.add(new org.jfree.data.gantt.Task(w.getName(),
                    new SimpleTimePeriod(w.getStartAsDate(), w.getEndAsDate())));
            nbrOfObjects++;
            for (ch.zhaw.init.walj.projectmanagement.util.dbclasses.Task t : tasks) {
                if (t.getWorkpackageID() == w.getID()) {
                    taskSeries.add(new org.jfree.data.gantt.Task(t.getName(),
                            new SimpleTimePeriod(t.getStartAsDate(), t.getEndAsDate())));
                    nbrOfObjects++;
                }
            }
        }

        // add task series to collection
        TaskSeriesCollection collection = new TaskSeriesCollection();
        collection.add(taskSeries);
        return collection;
    }

    /**
     * creates a gantt chart with all workpackages and tasks
     * @throws NumberFormatException
     */
    public void createChart() throws NumberFormatException, IOException {

        // get data
        IntervalCategoryDataset dataset = createDataset();

        // create chart
        JFreeChart chart = ChartFactory.createGanttChart("", // chart title
                "", // domain axis label
                "", // range axis label
                dataset, // data
                false, // include legend
                false, // tooltips
                false // urls
        );

        // set white background
        chart.setBackgroundPaint(new Color(255, 255, 255));

        // set color of bars
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        CategoryItemRenderer renderer = plot.getRenderer();
        renderer.setSeriesPaint(0, new Color(0, 62, 102));

        // set size of the chart
        int width = 1200;
        int height = (40 * nbrOfObjects) + 200;

        // save picture as JPEG
        File gantChart = new File(path + "/Charts/GanttProject" + project.getID() + ".jpg");
        ChartUtilities.saveChartAsJPEG(gantChart, chart, width, height);
    }

}