FlexGanttFX

FlexGanttFX is a professional JavaFX Gantt chart and scheduling framework by DLSC Software & Consulting GmbH. It provides a model, timeline, graphics engine, renderers, layers, and optional controls for building planning, scheduling, and resource visualization applications.

Documentation, screenshots, and product information are available at flexganttfx.com.

• JavaFX Gantt chart controls with tree-table row headers and canvas-based rendering
• Time line, date line, event line, grid, calendar, now-line, and overlay layers
• Activity repositories, links, layouts, renderers, and row models
• Extra controls such as status bar, toolbar, radar, layers panel, and property views
• Dual licensing: AGPLv3 or commercial license
• No runtime license key is required. The old license-key enforcement has been removed, so anyone can build and run the library without licensing setup.

FlexGanttFX publishing to Maven Central is being set up. These are the coordinates for the upcoming 12.4.0 release.

<dependency>
    <groupId>com.flexganttfx</groupId>
    <artifactId>view</artifactId>
    <version>12.4.0</version>
</dependency>

Add extras if you need the optional helper controls:

<dependency>
    <groupId>com.flexganttfx</groupId>
    <artifactId>extras</artifactId>
    <version>12.4.0</version>
</dependency>

implementation "com.flexganttfx:view:12.4.0"
implementation "com.flexganttfx:extras:12.4.0" // optional

The lower-level artifacts are core, model, view, and extras.

The sketch below shows the essential steps. See FlexGanttFXTutorials for complete, runnable examples.

// 1. A row type: Aircraft rows have Aircraft children and carry Flight activities
public class Aircraft extends Row<Aircraft, Aircraft, Flight> {
    public Aircraft(String name) {
        super(name);
    }
}

// 2. An activity type
public class Flight extends MutableActivityBase<FlightData> {
    public Flight(FlightData data) {
        setUserObject(data);
        setName(data.getFlightNo());
        setStartTime(data.getDepartureTime()); // java.time.Instant
        setEndTime(data.getArrivalTime());
    }
}

// 3. Wire up the chart
GanttChart<Aircraft> gantt = new GanttChart<>(new Aircraft("ROOT"));

Layer layer = new Layer("Flights");
gantt.getLayers().add(layer);

Aircraft b747 = new Aircraft("B747");
b747.addActivity(layer, new Flight(flightData));
gantt.getRoot().getChildren().add(b747);

gantt.getTimeline().showTemporalUnit(ChronoUnit.HOURS, 10);

GraphicsBase<Aircraft> graphics = gantt.getGraphics();
graphics.setActivityRenderer(
        Flight.class,
        GanttLayout.class,
        new ActivityBarRenderer<>(graphics, "Flight Renderer"));
graphics.showEarliestActivities();

For complete examples, see the tutorial and demo modules in this repository.

Other modules contain demos, tutorials, tooling, integrations, and assembly packaging.

• Website and documentation: https://www.flexganttfx.com
• API Javadoc: docs/api/index.html
• Showcase module: FlexGanttFXShowcase
• Demo modules: FlexGanttFXDemos
• Tutorial module: FlexGanttFXTutorials

FlexGanttFX is dual-licensed.

You may use FlexGanttFX under the GNU Affero General Public License v3.0. The AGPLv3 is a strong copyleft open source license with network-copyleft obligations. If you distribute an application, or offer a network/SaaS product, that includes FlexGanttFX, you must comply with the AGPLv3 source-code obligations for the combined work.

If you want to use FlexGanttFX in a proprietary product, closed-source application, or commercial SaaS offering without the AGPLv3 obligations, purchase a commercial license from DLSC.

• Licensing page: https://www.flexganttfx.com/pages/licensing.html
• Commercial license document: commercial-enterprise-license.pdf
• Contact: dlemmermann@gmail.com

This README is a practical summary, not legal advice. Please review the license texts and consult your own legal counsel if needed.

Requirements:

• JDK 25 to build the whole repository. The demo and showcase modules target Java 25.
• The published libraries themselves are compiled with --release 11, so applications only need JDK 11+.
• JavaFX 17.0.14 for the libraries (managed by Maven), Maven 3.9+.

Build everything from the repository root:

mvn install

Build only the libraries (these target Java 11):

mvn install -pl FlexGanttFXCore,FlexGanttFXModel,FlexGanttFXView,FlexGanttFXExtras -am

Run all tests:

mvn test

Run one module's tests:

mvn test -pl FlexGanttFXModel

Run one test class:

mvn test -pl FlexGanttFXModel -Dtest=SomeTest

The test stack includes JUnit 5, TestFX, Mockito, Hamcrest, and JMemoryBuddy.

• Contributing guidelines
• Security policy
• Code of conduct
• Third-party notices

Before contributing Java code, run mvn license:format so new files receive the standard license header.