Vertical ProgressBar JavaFX - javafx-2

Question

I have a StackPane with the size of (15px width, 400px height). I want to but a "Vertical ProgressBar" to that StackPane. What I was doing is to rotate the progressbar by 90 degree. However, the progressBar cannot fit in the stackpane with that rotation. It just shows as a small squared progressbar at the center of StackPane.
How can I fixed that?

Answer 1

Sample vertical progress bar.
class UpwardProgress {
private ProgressBar progressBar = new ProgressBar();
private Group progressHolder = new Group(progressBar);
public UpwardProgress(double width, double height) {
progressBar.setMinSize(StackPane.USE_PREF_SIZE, StackPane.USE_PREF_SIZE);
progressBar.setPrefSize(height, width);
progressBar.setMaxSize(StackPane.USE_PREF_SIZE, StackPane.USE_PREF_SIZE);
progressBar.getTransforms().setAll(
new Translate(0, height),
new Rotate(-90, 0, 0)
);
}
public ProgressBar getProgressBar() {
return progressBar;
}
public Group getProgressHolder() {
return progressHolder;
}
}
Used in a sample app.
import javafx.animation.*;
import javafx.application.Application;
import javafx.beans.property.*;
import javafx.scene.*;
import javafx.scene.canvas.*;
import javafx.scene.control.*;
import javafx.scene.image.PixelWriter;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;
import javafx.scene.transform.*;
import javafx.stage.Stage;
import javafx.util.Duration;
import java.util.Random;
class UpwardProgress {
private ProgressBar progressBar = new ProgressBar();
private Group progressHolder = new Group(progressBar);
public UpwardProgress(double width, double height) {
progressBar.setMinSize(StackPane.USE_PREF_SIZE, StackPane.USE_PREF_SIZE);
progressBar.setPrefSize(height, width);
progressBar.setMaxSize(StackPane.USE_PREF_SIZE, StackPane.USE_PREF_SIZE);
progressBar.getTransforms().setAll(
new Translate(0, height),
new Rotate(-90, 0, 0)
);
}
public ProgressBar getProgressBar() {
return progressBar;
}
public Group getProgressHolder() {
return progressHolder;
}
}
public class StarCounter extends Application {
public static final Color INDIA_INK = Color.rgb(35, 39, 50);
private static final int CANVAS_SIZE = 400;
private static final int N_STARS = 1_000;
private final Canvas canvas = new Canvas(CANVAS_SIZE, CANVAS_SIZE);
private final Random random = new Random(42);
private final IntegerProperty visibleStars = new SimpleIntegerProperty(0);
private Timeline timeline;
#Override
public void start(final Stage stage) {
Group root = initProgress();
clearCanvas();
visibleStars.addListener((observable, oldValue, newValue) -> {
if (newValue.intValue() > oldValue.intValue()) {
addStars(newValue.intValue() - oldValue.intValue());
}
});
stage.setScene(
new Scene(
new HBox(canvas, root),
INDIA_INK
)
);
stage.show();
runSimulation();
stage.getScene().setOnMouseClicked(event -> {
resetSimulation();
runSimulation();
});
}
private Group initProgress() {
UpwardProgress upwardProgress = new UpwardProgress(15, 400);
ProgressIndicator bar = upwardProgress.getProgressBar();
bar.setStyle("-fx-base: skyblue; -fx-accent: gold;");
bar.progressProperty().bind(visibleStars.divide(N_STARS * 1.0));
return upwardProgress.getProgressHolder();
}
private void resetSimulation() {
clearCanvas();
if (timeline != null) {
timeline.stop();
timeline = null;
}
}
private void runSimulation() {
timeline = new Timeline(
new KeyFrame(
Duration.seconds(0),
new KeyValue(visibleStars, 0)
),
new KeyFrame(
Duration.seconds(10),
new KeyValue(visibleStars, N_STARS)
)
);
timeline.play();
}
private void clearCanvas() {
canvas.getGraphicsContext2D().setFill(INDIA_INK);
canvas.getGraphicsContext2D().fillRect(0, 0, CANVAS_SIZE, CANVAS_SIZE);
}
private void addStars(int nStarsToAdd) {
GraphicsContext context = canvas.getGraphicsContext2D();
PixelWriter writer = context.getPixelWriter();
for (int i = 0; i < nStarsToAdd; i++) {
writer.setColor(random.nextInt(CANVAS_SIZE), random.nextInt(CANVAS_SIZE), Color.GOLD);
}
}
public static void main(String[] args) {
launch(args);
}
}

Answer 2

There's another alternative to this, which is, to make your own custom vertical progress-bar. Sounds too much but isn't. The advantage of this approach is that this is more consistent in UI and more dynamically approachable. I used the above answer by #jewel but struggled with UI consistency and dynamic behavior of the progress-bar.
The approach being use a vbox for the progress-bar and inside it another vbox for bar.
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.layout.VBox?>
<VBox xmlns="http://javafx.com/javafx/8.0.65" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.device.ui.VerticalProgressBarController">
<children>
<VBox fx:id="progress_bar" alignment="BOTTOM_CENTER" prefHeight="450.0" prefWidth="20.0" style="-fx-border-color: black; -fx-border-radius: 2 2 2 2;">
<children>
<VBox fx:id="bar" prefHeight="0.0" prefWidth="20.0" style="-fx-border-radius: 2 2 2 2;"/>
</children>
</VBox>
</children>
</VBox>
One can adjust the prefHeight of progress-bar and bar dynamically in controller or statically in .fxml file. Since here, only bar was the one I needed to adjust dynamically, so have set its prefHeight as 0 and adjust it appropriately in corresponding controller.
public class VerticalProgressBarController implements Initializable {
#FXML
VBox progress_bar;
#FXML
VBox bar;
private double progress_bar,fixed_capacity;
public void initialize(URL location, ResourceBundle resources) {
progressBarHeight = progress_bar.getPrefHeight();
bar.setMaxHeight(progressBarHeight);
// initial bar color
setGreenBar();
// set the max capacity of the progress bar
fixed_capacity = 100;
// pass in the proportion; here wanted to show 15 on a scale of 100
updateProgressBar(15 / fixed_capacity);
}
public void setGreenBar(){
bar.setStyle("-fx-background-color: green");
}
public void setYellowBar(){
bar.setStyle("-fx-background-color: yellow");
}
public void setRedBar(){
bar.setStyle("-fx-background-color: red");
}
public void updateProgressBar(double progress){
bar.setPrefHeight(progressBarHeight * progress);
if(progress <= .60){
setGreenBar();
} else if(progress > .60 &&
progress <= .75){
setYellowBar();
}else {
setRedBar();
}
}