LibGdx and ImGui setup

[arcogabbo]

Im trying to get LibGdx setup with ImGui. Currently what im trying to achieve is to use the same window LibGdx creates to render ImGui.

public class MyGdxGame extends ApplicationAdapter {
        private ImplGlfw lwjglGlfw;
        private ImplGL3 implgl3;
        private ImGui imgui = ImGui.INSTANCE;
        private Context ctx;
        private GlfwWindow window;
        long windowHandle;

	@Override
	public void create () {
            //context setup
            GL.createCapabilities();
            ctx=new Context();
            
            //take windowHandle of libgdx window
            windowHandle =((Lwjgl3Graphics) Gdx.graphics).getWindow().getWindowHandle();
            window=GlfwWindow.from(windowHandle);
            lwjglGlfw=new ImplGlfw(window,true,null);
            window.makeContextCurrent();
            implgl3=new ImplGL3();
	}

However i get an exception thrown on the ImplGlfw constructor.

Exception in thread "main" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.NoSuchMethodError: 'long uno.glfw.GlfwWindow.getHandle()'
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application.<init>(Lwjgl3Application.java:120)
	at com.mygdx.game.desktop.DesktopLauncher.main(DesktopLauncher.java:10)
Caused by: java.lang.NoSuchMethodError: 'long uno.glfw.GlfwWindow.getHandle()'
	at imgui.impl.glfw.ImplGlfw.<init>(ImplGlfw.kt:77)
	at com.mygdx.game.MyGdxGame.create(MyGdxGame.java:62)
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Window.initializeListener(Lwjgl3Window.java:433)
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Window.update(Lwjgl3Window.java:381)
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application.loop(Lwjgl3Application.java:138)
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application.<init>(Lwjgl3Application.java:114)
	... 1 more

Im currently using uno-sdk 0.7.9, LibGdx 1.9.11 and imgui 1.76

[elect86]

Hi,

this shall suggest the uno dependency mismatches

is the project public?

[arcogabbo]

I just created a repository, here. You can see that unosdk is locally in there, because for this test i grabbed the latest uno-core-all.jar .

[IgorOffline]

Hello, I created a repository which should solve your issue libgdx_imgui_template_November2020

[arcogabbo]

Hello, I created a repository which should solve your issue libgdx_imgui_template_November2020

i managed to get the correct dependencies for imgui and uno but now kotlin comes in. I admit that i've never used Kotlin and i wanted to add imgui to my java project but it seems i am missing something with kotlin now. At runtime i get this:

Exception in thread "main" com.badlogic.gdx.utils.GdxRuntimeException: java.lang.NoClassDefFoundError: unsigned/ByteKt
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application.<init>(Lwjgl3Application.java:120)
	at com.mygdx.game.desktop.DesktopLauncher.main(DesktopLauncher.java:10)
Caused by: java.lang.NoClassDefFoundError: unsigned/ByteKt
	at imgui.internal.Generic_helpersKt.hash(generic helpers.kt:148)
	at imgui.internal.Generic_helpersKt.hash$default(generic helpers.kt:117)
	at imgui.classes.Context.initialize(Context.kt:593)
	at imgui.classes.Context.<init>(Context.kt:584)
	at imgui.classes.Context.<init>(Context.kt:26)
	at imgui.classes.Context.<init>(Context.kt)
	at com.mygdx.game.MyGdxGame.create(MyGdxGame.java:30)
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Window.initializeListener(Lwjgl3Window.java:433)
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Window.update(Lwjgl3Window.java:381)
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application.loop(Lwjgl3Application.java:138)
	at com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application.<init>(Lwjgl3Application.java:114)
	... 1 more
Caused by: java.lang.ClassNotFoundException: unsigned.ByteKt
	at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:602)
	at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
	at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
	... 12 more

i updated my example repository here to show you the gradle build file.