Last post show "Apply Animaton in JavaFX Charts with Timeline", and mentioned the BarChart show wrong graph if setAnimated(true). In order to show the behavior, the example is modified to create two BarCharts to show the same data. The BarChart on left side with setAnimated(false) show the correct graph, on the right side setAnimated(true) show the wrong graph.
package javafx_histogram;
import java.util.Random;
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.scene.Scene;
import javafx.scene.chart.BarChart;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.scene.control.Label;
import javafx.scene.layout.HBox;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Duration;
/**
* @web http://java-buddy.blogspot.com
*/
public class JavaFX_Histogram extends Application {
int group[] = new int[10];
@Override
public void start(Stage primaryStage) {
prepareData();
Label labelInfo = new Label();
labelInfo.setText(
"java.version: " + System.getProperty("java.version") + "\n"
+ "javafx.runtime.version: " + System.getProperty("javafx.runtime.version")
);
//barChart1 with setAnimated(false)
VBox vBoxBarChart1 = new VBox();
final CategoryAxis xAxis1 = new CategoryAxis();
final NumberAxis yAxis1 = new NumberAxis();
final BarChart<String, Number> barChart1
= new BarChart<>(xAxis1, yAxis1);
barChart1.setCategoryGap(0);
barChart1.setBarGap(0);
barChart1.setMaxSize(500, 450);
XYChart.Series series1 = new XYChart.Series();
series1.setName("Animated = false");
series1.getData().add(new XYChart.Data("0-10", group[0]));
series1.getData().add(new XYChart.Data("10-20", group[1]));
series1.getData().add(new XYChart.Data("20-30", group[2]));
series1.getData().add(new XYChart.Data("30-40", group[3]));
series1.getData().add(new XYChart.Data("40-50", group[4]));
series1.getData().add(new XYChart.Data("50-60", group[5]));
series1.getData().add(new XYChart.Data("60-70", group[6]));
series1.getData().add(new XYChart.Data("70-80", group[7]));
series1.getData().add(new XYChart.Data("80-90", group[8]));
series1.getData().add(new XYChart.Data("90-100", group[9]));
barChart1.getData().addAll(series1);
Label labelAnimated1 = new Label();
barChart1.setAnimated(false);
vBoxBarChart1.getChildren().addAll(barChart1, labelAnimated1);
//- End of barChart1
//barChart2 with setAnimated(true)
VBox vBoxBarChart2 = new VBox();
final CategoryAxis xAxis2 = new CategoryAxis();
final NumberAxis yAxis2 = new NumberAxis();
final BarChart<String, Number> barChart2
= new BarChart<>(xAxis2, yAxis2);
barChart2.setCategoryGap(0);
barChart2.setBarGap(0);
barChart2.setMaxSize(500, 450);
XYChart.Series series2 = new XYChart.Series();
series2.setName("Animated = true");
series2.getData().add(new XYChart.Data("0-10", group[0]));
series2.getData().add(new XYChart.Data("10-20", group[1]));
series2.getData().add(new XYChart.Data("20-30", group[2]));
series2.getData().add(new XYChart.Data("30-40", group[3]));
series2.getData().add(new XYChart.Data("40-50", group[4]));
series2.getData().add(new XYChart.Data("50-60", group[5]));
series2.getData().add(new XYChart.Data("60-70", group[6]));
series2.getData().add(new XYChart.Data("70-80", group[7]));
series2.getData().add(new XYChart.Data("80-90", group[8]));
series2.getData().add(new XYChart.Data("90-100", group[9]));
barChart2.getData().addAll(series2);
Label labelAnimated2 = new Label();
barChart2.setAnimated(true);
vBoxBarChart2.getChildren().addAll(barChart2, labelAnimated2);
//- End of barChart2
HBox hBoxCharts = new HBox();
hBoxCharts.getChildren().addAll(vBoxBarChart1, vBoxBarChart2);
Label labelCnt = new Label();
VBox vBox = new VBox();
vBox.getChildren().addAll(labelInfo, hBoxCharts, labelCnt);
StackPane root = new StackPane();
root.getChildren().add(vBox);
Scene scene = new Scene(root, 1000, 500);
primaryStage.setTitle("java-buddy.blogspot.com");
primaryStage.setScene(scene);
primaryStage.show();
Random random = new Random();
//Apply Animating Data in Charts
//ref: http://docs.oracle.com/javafx/2/charts/bar-chart.htm
//"Animating Data in Charts" section
Timeline timeline = new Timeline();
timeline.getKeyFrames().add(
new KeyFrame(Duration.millis(200), (ActionEvent actionEvent) -> {
//int data = random.nextInt(100);
final int mean = 50;
final int standardDeviation = 10;
int data = mean + (int)(random.nextGaussian() * standardDeviation);
if (data <= 10) {
group[0]++;
series1.getData().set(0, new XYChart.Data("0-10", group[0]));
series2.getData().set(0, new XYChart.Data("0-10", group[0]));
} else if (data <= 20) {
group[1]++;
series1.getData().set(1, new XYChart.Data("10-20", group[1]));
series2.getData().set(1, new XYChart.Data("10-20", group[1]));
} else if (data <= 30) {
group[2]++;
series1.getData().set(2, new XYChart.Data("20-30", group[2]));
series2.getData().set(2, new XYChart.Data("20-30", group[2]));
} else if (data <= 40) {
group[3]++;
series1.getData().set(3, new XYChart.Data("30-40", group[3]));
series2.getData().set(3, new XYChart.Data("30-40", group[3]));
} else if (data <= 50) {
group[4]++;
series1.getData().set(4, new XYChart.Data("40-50", group[4]));
series2.getData().set(4, new XYChart.Data("40-50", group[4]));
} else if (data <= 60) {
group[5]++;
series1.getData().set(5, new XYChart.Data("50-60", group[5]));
series2.getData().set(5, new XYChart.Data("50-60", group[5]));
} else if (data <= 70) {
group[6]++;
series1.getData().set(6, new XYChart.Data("60-70", group[6]));
series2.getData().set(6, new XYChart.Data("60-70", group[6]));
} else if (data <= 80) {
group[7]++;
series1.getData().set(7, new XYChart.Data("70-80", group[7]));
series2.getData().set(7, new XYChart.Data("70-80", group[7]));
} else if (data <= 90) {
group[8]++;
series1.getData().set(8, new XYChart.Data("80-90", group[8]));
series2.getData().set(8, new XYChart.Data("80-90", group[8]));
} else if (data <= 100) {
group[9]++;
series1.getData().set(9, new XYChart.Data("10-100", group[9]));
series2.getData().set(9, new XYChart.Data("10-100", group[9]));
}
labelAnimated1.setText(
"barChart1.getAnimated() = " + barChart1.getAnimated());
labelAnimated2.setText(
"barChart2.getAnimated() = " + barChart2.getAnimated());
String s = "";
for(int i=0; i<10; i++){
s+= " " + group[i];
}
labelCnt.setText(s);
}));
timeline.setCycleCount(1000);
timeline.setAutoReverse(true); //!?
timeline.play();
}
public static void main(String[] args) {
launch(args);
}
//generate dummy random data
private void prepareData() {
for (int i = 0; i < 10; i++) {
group[i] = 0;
}
}
}
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