This is a utility for generating a GUI and related controllers/providers to obtain a selectable range. The initial target is for selecting a frequency range in a simple and intuitive way. Currently, this is specifically for selecting a 2D range along the X-axis.

Initially, this will focus on providing a Swing based GUI for selecting a range of values, but the goal is to offer both Swing and JavaFX-based solutions eventually.

One common feature is the ability to lock the range selection; this will preserve the current state until unlocked whether that state includes a selected range or not.

This is the ultra-simple proof-of-concept view:

Here is a basic histogram-based range selection view with an icon (that doubles as a button) showing the lock state:

The demo application is what runs when you execute the Spring application (./gradlew bootRun)

This project requires:

• JDK 11 (AdoptOpenJDK is an excellent, free, OpenJDK option.)
• JFormDesigner for working with the Swing UI .jfd files

This project leverages a few key libraries:

• Spring Boot (dependency injection framework and application runner)
• Apache Commons Lang3 (primarily for the Range class)

To build this project:

./gradlew clean build

To run the basic sample from the command line, execute:

./gradlew runSample

This is intended to be pulled into another project as a library.

Add the dependency:

implementation 'com.mikeoertli:range-selector'

Inject the RangeSelectorProvider and request a RangeSelectorController:

public class MyApplication {
    
    private final RangeSelectorProvider rangeSelectorProvider;

    @Inject
    public MyApplication(RangeSelectorProvider rangeSelectorProvider)
    {
        this.rangeSelectorProvider = rangeSelectorProvider;
    }
    
    public void doStuff()
    {
        RangeSelectorController controller = rangeSelectorProvider.createRangeSelectorController();
        
        RangeSelectorPanel panel = controller.getPanel();

        // ...
    }

}

Mike Oertli

Questions, comments, and pull requests are welcome!