Screen

Prerequisites

Before we can get started, we need to have a class implementing HandledScreen of type ExampleScreenHandler. In action it would look a bit like this:

Initial screen

public class ExampleScreen extends HandledScreen<ExampleScreenHandler> {
}

Then we need a field which is the texture of your gui. Mine looks like this:

private static final Identifier TEXTURE = new Identifier(ExampleMod.MOD_ID, "textures/gui/example_gui.png");

This points to the resources/assets/MOD_ID/textures/gui/example_gui.png file.

You can see the progress arrow already! Now you can implement everything your IDE asks for including the constructor matching super.

Required Methods

init()

@Override
protected void init() {
    super.init();
    titleY = 1000;//(1)!
    playerInventoryTitleY = 1000;//(2)!
}

1. This is the height of the title the block entity screen has, like you would see with vanilla block entities such as a furnace
2. This is the height of the title of your inventory that says `Inventory

drawBackGround()

@Override
protected void drawBackground(DrawContext context, float delta, int mouseX, int mouseY) {
    RenderSystem.setShader(GameRenderer::getPositionTexProgram);
    RenderSystem.setShaderColor(1f, 1f, 1f, 1f);
    RenderSystem.setShaderTexture(0, TEXTURE);
    int x = (width - backgroundWidth) / 2;
    int y = (height - backgroundHeight) / 2;

    context.drawTexture(TEXTURE, x, y, 0, 0, backgroundWidth, backgroundHeight);

    renderProgressArrow(context, x, y);
}

render()

@Override
public void render(DrawContext context, int mouseX, int mouseY, float delta) {
    renderBackground(context, mouseX, mouseY, delta);
    super.render(context, mouseX, mouseY, delta);
    drawMouseoverTooltip(context, mouseX, mouseY);
}

Non-required but recommended methods

renderProgressArrow()

private void renderProgressArrow(DrawContext context, int x, int y) {
    if(handler.isCrafting()) {
        context.drawTexture(TEXTURE, x + 85, y + 30, 176, 0, 8, handler.getScaledProgress());
    }
}

Finishing up

Now we can do the final things to complete our multiple output block entity!

Finishing up