MineGui

MineGui is a Fabric client library that embeds Dear ImGui into Minecraft 1.21.4, giving mod developers an immediate-mode toolset for in-game overlays, inspectors, and interactive editors without leaving the client.

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Philosophy & Goals

• Immediate-first runtime that stays thin so you can script raw ImGui every frame.
• Utility-driven helpers for cursor policies, constraint math, textures, and fonts without dictating component hierarchies.
• Stable, lightweight lifecycle that prioritizes predictable hooks and minimal overhead in production builds.

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Developer Docs

You can find the developer documentation HERE.

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Supported Features

MineGui bundles the full imgui-java runtime and layers tooling around it so you can stay inside Dear ImGui while building Fabric mods:

• Full Dear ImGui API — Views implement renderView() and call native widgets every frame while MineGui drives the render loop.
• View lifecycle & persistence — ViewSaveManager tracks visibility, persists window state, and lets you plug in custom adapters per namespace.
• Themes, fonts & styles — StyleManager, MGStyleDescriptor, and MGFontLibrary manage transient style deltas, named themes, and registered font atlases.
• Layouts & sizing helpers — MineGuiContext.layout() offers stack/grid builders while VStack/HStack keep constraint math and spacing utilities immediate-mode friendly.
• Textures & drawing utilities — ImGuiImageUtils streams Minecraft textures into ImGui draw lists, handles UV transforms, and keeps caches in sync with the client renderer.
• Namespaces, config & commands — MineGuiInitializationOptions wires global config, cursor policies, and persistence per namespace, while commands like /minegui reload refresh live styles during development.

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Supported Minecraft Versions

• Fabric Loader 1.21.4 with Yarn mappings 1.21.4+build.8

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Installation & Initialization

Set minegui_version=0.0.3-0.119.4+1.21.4+build.8 in your gradle.properties, then follow the steps below. Check GitHub Packages for the latest published versions.

1. Add the GitHub Packages repository
   In your root build.gradle (or settings.gradle if you centralize repositories), include:

repositories {
    maven {
        url = uri("https://maven.pkg.github.com/trethore/MineGui")
        credentials {
            username = findProperty("gpr.user") ?: System.getenv("GITHUB_ACTOR")
            password = findProperty("gpr.key") ?: System.getenv("GITHUB_TOKEN")
        }
    }
}

Recommended: store credentials in ~/.gradle/gradle.properties.

gpr.user=YOUR_GITHUB_USERNAME
gpr.key=YOUR_PERSONAL_ACCESS_TOKEN

Generate a personal access token with read:packages scope.

2. Add the dependency
   Declare MineGui as a mod dependency alongside Fabric loader and Fabric API:

dependencies {
    modImplementation include("tytoo.minegui:minegui:${project.minegui_version}")
    sourceDeps "tytoo.minegui:minegui:${project.minegui_version}:sources@jar"
}

Alternatively, add MineGui through Maven:

<dependency>
  <groupId>tytoo.minegui</groupId>
  <artifactId>minegui</artifactId>
  <version>0.0.3-0.119.4+1.21.4+build.8</version>
</dependency>

3. Initialize MineGui in your client entrypoint
   MineGui does not auto-register a runtime initializer. Call MineGuiCore.init(...) before you register any views:

import net.fabricmc.api.ClientModInitializer;
import tytoo.minegui.MineGuiCore;
import tytoo.minegui.MineGuiInitializationOptions;
import tytoo.minegui.runtime.MineGuiContext;

public final class MyModClient implements ClientModInitializer {
    private MineGuiContext mineGui;

    @Override
    public void onInitializeClient() {
        mineGui = MineGuiCore.init(MineGuiInitializationOptions.defaults("your_namespace"));
        // mineGui.layout() exposes the new layout DSL; mineGui.ui() returns the namespace UI manager.
    }
}

4. Run in development
   Use the bundled Gradle tasks while building MineGui or integrating it into another mod:

./gradlew build            # assemble artifacts and run checks
./gradlew runDebugClient   # develop MineGui with debug overlays and commands enabled
# or, when testing MineGui as a dependency in another mod:
./gradlew runClient

In-game debug commands such as /minegui reload and /minegui export style force are available only in debug runs.

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Contributing

Contributions are welcome!

• Report bugs or request features in the issue tracker.

• Submit improvements and fixes as pull requests.

• Before contributing, make sure you can build and test the project locally:

  ./gradlew build            # assemble and run checks
  ./gradlew runDebugClient   # develop MineGui with debug commands enabled
  # or, when testing MineGui as a dependency in another mod:
  ./gradlew runClient
  

Please follow best practices (clean code, descriptive commits, small PRs).

License

MineGui is released under the MIT License.