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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:

GUI Texture

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;
    playerInventoryTitleY = 1000;
}
info

titleY is the height of the title the block entity screen has, like you would see with vanilla block entities such as a furnace playerInventoryTitleY 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);
}

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());
    }
}

This will render that nifty little arrow that shows how far the crafting is at current time by checking is the handler is crafting. If that is true, then we draw a texture, which is the texture specified above, get the x and y coordinates + an offset and a scaledprogress we defined earlier.

Finishing up​

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

Finishing up