1 /*
   2  * Copyright (c) 2008, 2014, Oracle and/or its affiliates.
   3  * All rights reserved. Use is subject to license terms.
   4  *
   5  * This file is available and licensed under the following license:
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  *  - Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *  - Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the distribution.
  16  *  - Neither the name of Oracle Corporation nor the names of its
  17  *    contributors may be used to endorse or promote products derived
  18  *    from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32 package ensemble.samples.charts.line.stock;
  33 
  34 
  35 import javafx.animation.Animation;
  36 import javafx.animation.KeyFrame;
  37 import javafx.animation.Timeline;
  38 import javafx.application.Application;
  39 import javafx.event.ActionEvent;
  40 import javafx.event.EventHandler;
  41 import javafx.scene.Parent;
  42 import javafx.scene.Scene;
  43 import javafx.scene.chart.LineChart;
  44 import javafx.scene.chart.NumberAxis;
  45 import javafx.scene.chart.XYChart;
  46 import javafx.stage.Stage;
  47 import javafx.util.Duration;
  48 
  49 
  50 /**
  51  * A simulated stock line chart.
  52  *
  53  * @sampleName Stock Line Chart
  54  * @preview preview.png
  55  * @see javafx.scene.chart.LineChart
  56  * @see javafx.scene.chart.NumberAxis
  57  * @docUrl https://docs.oracle.com/javafx/2/charts/jfxpub-charts.htm Using JavaFX Charts Tutorial
  58  */
  59 public class StockLineChartApp extends Application {
  60 
  61     private LineChart<Number, Number> chart;
  62     private XYChart.Series<Number, Number> hourDataSeries;
  63     private XYChart.Series<Number, Number> minuteDataSeries;
  64     private NumberAxis xAxis;
  65     private Timeline animation;
  66     private double hours = 0;
  67     private double minutes = 0;
  68     private double timeInHours = 0;
  69     private double prevY = 10;
  70     private double y = 10;
  71 
  72     public StockLineChartApp() {
  73         // create timeline to add new data every 60th of second
  74         animation = new Timeline();
  75         animation.getKeyFrames()
  76                 .add(new KeyFrame(Duration.millis(1000 / 60), (ActionEvent actionEvent) -> {
  77                      // 6 minutes data per frame
  78                     for (int count = 0; count < 6; count++) {
  79                         nextTime();
  80                         plotTime();
  81                     }
  82         }));
  83         animation.setCycleCount(Animation.INDEFINITE);
  84     }
  85 
  86     public Parent createContent() {
  87         xAxis = new NumberAxis(0, 24, 3);
  88         final NumberAxis yAxis = new NumberAxis(0, 100, 10);
  89         chart = new LineChart<>(xAxis, yAxis);
  90         // setup chart
  91         chart.getStylesheets().add(StockLineChartApp.class.getResource("StockLineChart.css").toExternalForm());
  92         chart.setCreateSymbols(false);
  93         chart.setAnimated(false);
  94         chart.setLegendVisible(false);
  95         chart.setTitle("ACME Company Stock");
  96         xAxis.setLabel("Time");
  97         xAxis.setForceZeroInRange(false);
  98         yAxis.setLabel("Share Price");
  99         yAxis
 100                 .setTickLabelFormatter(new NumberAxis.DefaultFormatter(yAxis, "$", null));
 101         // add starting data
 102         hourDataSeries = new XYChart.Series<>();
 103         hourDataSeries.setName("Hourly Data");
 104         minuteDataSeries = new XYChart.Series<>();
 105         minuteDataSeries.setName("Minute Data");
 106         // create some starting data
 107         hourDataSeries.getData()
 108                 .add(new XYChart.Data<Number, Number>(timeInHours, prevY));
 109         minuteDataSeries.getData()
 110                 .add(new XYChart.Data<Number, Number>(timeInHours, prevY));
 111         for (double m = 0; m < (60); m++) {
 112             nextTime();
 113             plotTime();
 114         }
 115         chart.getData().add(minuteDataSeries);
 116         chart.getData().add(hourDataSeries);
 117         return chart;
 118     }
 119 
 120     private void nextTime() {
 121         if (minutes == 59) {
 122             hours++;
 123             minutes = 0;
 124         } else {
 125             minutes++;
 126         }
 127         timeInHours = hours + ((1d / 60d) * minutes);
 128     }
 129 
 130     private void plotTime() {
 131         if ((timeInHours % 1) == 0) {
 132             // change of hour
 133             double oldY = y;
 134             y = prevY - 10 + (Math.random() * 20);
 135             prevY = oldY;
 136             while (y < 10 || y > 90) {
 137                 y = y - 10 + (Math.random() * 20);
 138             }
 139             hourDataSeries.getData()
 140                     .add(new XYChart.Data<Number, Number>(timeInHours, prevY));
 141             // after 25hours delete old data
 142             if (timeInHours > 25) {
 143                 hourDataSeries.getData().remove(0);
 144             }
 145             // every hour after 24 move range 1 hour
 146             if (timeInHours > 24) {
 147                 xAxis.setLowerBound(xAxis.getLowerBound() + 1);
 148                 xAxis.setUpperBound(xAxis.getUpperBound() + 1);
 149             }
 150         }
 151         double min = (timeInHours % 1);
 152         double randomPickVariance = Math.random();
 153         if (randomPickVariance < 0.3) {
 154             double minY = prevY + ((y - prevY) * min) - 4 + (Math.random() * 8);
 155             minuteDataSeries.getData().add(new XYChart.Data<Number, Number>(timeInHours, minY));
 156         } else if (randomPickVariance < 0.7) {
 157             double minY = prevY + ((y - prevY) * min) - 6 + (Math.random() * 12);
 158             minuteDataSeries.getData().add(new XYChart.Data<Number, Number>(timeInHours, minY));
 159         } else if (randomPickVariance < 0.95) {
 160             double minY = prevY + ((y - prevY) * min) - 10 + (Math.random() * 20);
 161             minuteDataSeries.getData().add(new XYChart.Data<Number, Number>(timeInHours, minY));
 162         } else {
 163             double minY = prevY + ((y - prevY) * min) - 15 + (Math.random() * 30);
 164             minuteDataSeries.getData().add(new XYChart.Data<Number, Number>(timeInHours, minY));
 165         }
 166         // after 25hours delete old data
 167         if (timeInHours > 25) {
 168             minuteDataSeries.getData().remove(0);
 169         }
 170     }
 171 
 172     public void play() {
 173         animation.play();
 174     }
 175 
 176     @Override
 177     public void stop() {
 178         animation.pause();
 179     }
 180 
 181     @Override public void start(Stage primaryStage) throws Exception {
 182         primaryStage.setScene(new Scene(createContent()));
 183         primaryStage.show();
 184         play();
 185     }
 186 
 187     /**
 188      * Java main for when running without JavaFX launcher
 189      * @param args command line arguments
 190      */
 191     public static void main(String[] args) {
 192         launch(args);
 193     }    
 194 }