To add a loading screen in JavaFX, you can create a separate scene with a loading indicator (e.g. a progress bar) and show it before the main scene is loaded.
Here’s an example of how you can do this:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.ProgressBar;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class LoadingScreenExample extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
// Create a progress bar to show the loading progress
ProgressBar progressBar = new ProgressBar();
// Create a stack pane to hold the progress bar
StackPane loadingPane = new StackPane();
loadingPane.getChildren().add(progressBar);
// Create a scene for the loading screen
Scene loadingScene = new Scene(loadingPane, 500, 500);
// Set the loading screen as the initial scene
primaryStage.setScene(loadingScene);
primaryStage.show();
// Simulate a long-running task by pausing for a few seconds
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
// Create the main scene
Scene mainScene = new Scene(new StackPane(), 800, 600);
// Set the main scene as the current scene
primaryStage.setScene(mainScene);
}
}In this example, the loading screen with the progress bar is shown first, and then after a few seconds (to simulate a long-running task), the main scene is set as the current scene.
Note that the above example uses a progress bar to show the loading progress, but you can use any other loading indicator, such as a spinning wheel or a loading text message.
You can also customize the appearance of the loading screen to your liking by setting the style of the progress bar or by adding other elements to the loading pane.
Loading Behavior when component rendering has not finished
To add a loading screen in JavaFX when the main scene is not yet fully rendered, you can use a Task and a ProgressBar to show the progress of the rendering process.
Here’s an example of how you can do this:
import javafx.application.Application;
import javafx.concurrent.Task;
import javafx.scene.Scene;
import javafx.scene.control.ProgressBar;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class LoadingScreenExample extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
// Create a progress bar to show the loading progress
ProgressBar progressBar = new ProgressBar();
// Create a stack pane to hold the progress bar
StackPane loadingPane = new StackPane();
loadingPane.getChildren().add(progressBar);
// Create a scene for the loading screen
Scene loadingScene = new Scene(loadingPane, 500, 500);
// Set the loading screen as the initial scene
primaryStage.setScene(loadingScene);
primaryStage.show();
// Create a task to render the main scene
Task<Scene> renderTask = new Task<>() {
@Override
protected Scene call() throws Exception {
// Simulate a long-running task by pausing for a few seconds
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
// Create the main scene
Scene mainScene = new Scene(new StackPane(), 800, 600);
return mainScene;
}
};
// Set the main scene as the current scene when the rendering task is completed
renderTask.setOnSucceeded(event -> primaryStage.setScene(renderTask.getValue()));
// Start the rendering task
new Thread(renderTask).start();
}
}In this example, the Task is used to simulate a long-running task that renders the main scene. The progress bar is updated as the task progresses. When the task is completed, the main scene is set as the current scene.
Customize Loading Screen
To customize the appearance of the loading screen in JavaFX, you can use different layout panes and controls to create the desired layout and design.
Here’s an example of how you can create a custom loading screen with a spinning wheel and a loading text message:
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
public class CustomLoadingScreenExample extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
// Create a spinning wheel to show the loading progress
ProgressIndicator progressIndicator = new ProgressIndicator();
// Create a label for the loading message
Label loadingLabel = new Label("Loading...");
// Create a vertical box to hold the spinning wheel and the loading message
VBox loadingPane = new VBox();
loadingPane.setAlignment(Pos.CENTER);
loadingPane.getChildren().addAll(progressIndicator, loadingLabel);
// Set the style of the spinning wheel and the loading message
loadingPane.setStyle("-fx-font-size: 32pt; -fx-text-fill: white; -fx-background-color: black;");
progressIndicator.setStyle("-fx-progress-color: white;");
// Create a stack pane to center the vertical box
StackPane root = new StackPane();
root.getChildren().add(loadingPane);
// Create a scene for the loading screen
Scene loadingScene = new Scene(root, 500, 500);
// Set the loading screen as the initial scene
primaryStage.setScene(loadingScene);
primaryStage.show();
// Simulate a long-running task by pausing for a few seconds
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
// Create the main scene
Scene mainScene = new Scene(new StackPane(), 800, 600);
// Set the main scene as the current scene
primaryStage.setScene(mainScene);
}
}In this example, a vertical box containing a spinning wheel and a loading text message is used as the loading pane.
The style of the spinning wheel and the loading message is customized by setting the CSS properties of the vertical box and the spinning wheel.
The loading pane is then centered within a stack pane, which is used as the root node of the loading scene.
You can customize the appearance and behavior of the loading screen further by adding more controls or layout panes, or by using other loading indicators, such as a progress bar or a loading animation.
Create Loading Screen as a reusable component
To create a reusable loading component in JavaFX, you can define a class that extends StackPane and contains the loading indicator and any other elements that you want to include in the loading screen.
Here’s an example of how you can create a reusable loading component with a spinning wheel and a loading text message:
import javafx.geometry.Pos;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
public class LoadingComponent extends StackPane {
public LoadingComponent() {
// Create a spinning wheel to show the loading progress
ProgressIndicator progressIndicator = new ProgressIndicator();
// Create a label for the loading message
Label loadingLabel = new Label("Loading...");
// Create a vertical box to hold the spinning wheel and the loading message
VBox loadingPane = new VBox();
loadingPane.setAlignment(Pos.CENTER);
loadingPane.getChildren().addAll(progressIndicator, loadingLabel);
// Set the style of the spinning wheel and the loading message
loadingPane.setStyle("-fx-font-size: 32pt; -fx-text-fill: white; -fx-background-color: black;");
progressIndicator.setStyle("-fx-progress-color: white;");
// Add the vertical box to the stack pane
getChildren().add(loadingPane);
}
}To use the loading component, you can add it to the scene or to a layout pane in your application. For example:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
// Create the loading component
LoadingComponent loadingComponent = new LoadingComponent();
// Create a scene with the loading component as the root node
Scene loadingScene = new Scene(loadingComponent, 500, 500);
// Set the loading screen as the initial scene
primaryStage.setScene(loadingScene);
primaryStage.show();
// Simulate a long-running task by pausing for a few seconds
try {
Thread.sleep(3000);
} catch (InterruptedException e) {
e.printStackTrace();
}
// Create the main scene
Scene mainScene = new Scene(new StackPane(), 800, 600);
// Set the main scene as the current scene
primaryStage.setScene(mainScene);
}
}In this example, the loading component is used as the root node of the loading scene. When the main scene is ready, it can be set as the current scene by calling primaryStage.setScene(mainScene).
You can customize the appearance and behavior of the loading component further by adding more controls or layout panes, or by using other loading indicators, such as a progress bar or a loading animation.
You can also pass parameters to the constructor of the loading component to customize its behavior or appearance.
