Building Graphs Bottom-Up using JavaFX

[novel wyvern]

Hey guys, I'm trying to build a directed graph up using JavaFX and was wondering if anyone knows of any libraries that could do a hierarchal layout that arranges the nodes. I had a look at JUNG but was wondering if there was a better alternative? Cheers for any help

[winged stirrup]

<@&987246487241105418> please have a look, thanks.

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the nodes in a bottom-up manner.

One library that you can use for building graphs in JavaFX is the JUNG (Java Universal Network/Graph) library. It provides various layout algorithms, including hierarchical layouts, that can arrange the nodes in a bottom-up manner.

Here's an example of how you can use JUNG to build a directed graph with a hierarchical layout:

1. First, add the JUNG library to your project dependencies. You can download it from the official website or include it using a build tool like Maven or Gradle.

2. Create a new JavaFX application and import the necessary JUNG classes:

import edu.uci.ics.jung.algorithms.layout.Layout;
import edu.uci.ics.jung.algorithms.layout.TreeLayout;
import edu.uci.ics.jung.graph.DirectedSparseGraph;
import edu.uci.ics.jung.visualization.VisualizationViewer;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;

3. In the start method of your JavaFX application, create a new DirectedSparseGraph and add some nodes and edges to it:

@Override
public void start(Stage primaryStage) {
    DirectedSparseGraph<String, String> graph = new DirectedSparseGraph<>();

    graph.addVertex("A");
    graph.addVertex("B");
    graph.addVertex("C");

    graph.addEdge("Edge1", "A", "B");
    graph.addEdge("Edge2", "B", "C");
}

4. Create a new TreeLayout with the DirectedSparseGraph as input:

Layout<String, String> layout = new TreeLayout<>(graph);

5. Create a new VisualizationViewer with the layout and set its preferred size:

VisualizationViewer<String, String> vv = new VisualizationViewer<>(layout);
vv.setPreferredSize(new Dimension(400, 300));

6. Create a new StackPane and add the VisualizationViewer to it:

StackPane root = new StackPane();
root.getChildren().add(vv);

7. Create a new Scene with the StackPane as root and set it as the scene for the primary stage:

Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.show();

This will create a JavaFX application with a directed graph displayed using JUNG's hierarchical layout algorithm.

Note that this is just a basic example to get you started. You can customize the appearance of the nodes and edges, handle user interactions, and add more advanced features based on your requirements.

Remember to include the necessary JUNG library files in your project's classpath for this code to work properly.

To add the JUNG (Java Universal Network/Graph Framework) dependency to your Gradle project, you need to follow these steps:

1. Open your project in a text editor or an IDE that supports Gradle (e.g., IntelliJ IDEA, Eclipse with Buildship plugin).
2. Locate the build.gradle file in your project's root directory.
3. Inside the dependencies block, add the following line:

implementation 'net.sf.jung:jung-api:2.1.1'

This line specifies the JUNG dependency and its version.

4. Save the build.gradle file.

Gradle will automatically download and include the JUNG library in your project when you build it.

Note: If you are using a different version of JUNG, replace '2.1.1' with the desired version number in step 3.