ScrollingEntityListWidget.java

package exonihility.client.gui;

import net.minecraft.client.MinecraftClient;
import net.minecraft.client.gui.DrawContext;
import net.minecraft.client.gui.screen.narration.NarrationMessageBuilder;
import net.minecraft.client.gui.widget.EntryListWidget;
import net.minecraft.client.render.entity.EntityRenderDispatcher;
import net.minecraft.client.util.math.MatrixStack;
import net.minecraft.entity.Entity;
import net.minecraft.text.Text;
import org.joml.Quaternionf;

public class ScrollingEntityListWidget extends EntryListWidget<ScrollingEntityListWidget.EntityEntry> {

    private final MinecraftClient client;
    public final int itemHeight;
    private Entity selectedEntity; // Field to store the selected entity

    public ScrollingEntityListWidget(MinecraftClient client, int width, int height, int y, int bottom, int itemHeight) {
        super(client, width, height, y, itemHeight);
        this.client = client;
        this.itemHeight = itemHeight;

        // Fetch entities directly from the current world and add them to the list
        if (client.world != null) {
            for (Entity entity : client.world.getEntities()) {
                addEntry(new EntityEntry(entity)); // Add each entity to the list
            }
        }
    }

    // Method to get the selected entity (if needed)
    public Entity getSelectedEntity() {
        return selectedEntity;
    }

    @Override
    protected void appendClickableNarrations(NarrationMessageBuilder builder) {
        
    }

    // Entry for rendering entities
    public class EntityEntry extends Entry<ScrollingEntityListWidget.EntityEntry> {
        private final Entity entity;

        public EntityEntry(Entity entity) {
            this.entity = entity;
        }

        @Override
        public void render(DrawContext context, int index, int y, int x, int entryWidth, int entryHeight, int mouseX, int mouseY, boolean hovered, float tickDelta) {
            // Highlight the selected entity entry
            if (entity == selectedEntity) {
                context.fill(x, y, x + entryWidth, y + entryHeight, 0x80FFFFFF); // Highlight with white transparency
            }

            renderEntityInList(context.getMatrices(), x + entryWidth / 2, y + entryHeight - 10, 30, entity);
        }

        // Handle click events to select the entity
        @Override
        public boolean mouseClicked(double mouseX, double mouseY, int button) {
            if (button == 0) { // Left-click
                selectedEntity = entity; // Set the selected entity
                return true;
            }
            return false;
        }

    }

    // Render method to display entities within the list
    private static void renderEntityInList(MatrixStack matrixStack, int posX, int posY, int scale, Entity entity) {
        matrixStack.push();
        matrixStack.translate(posX, posY, 50); // Positioning the entity in the list
        matrixStack.scale(scale, scale, scale); // Scaling the entity

        // Flip the entity upright and apply Y-axis rotation
        matrixStack.multiply(new Quaternionf().rotateX((float) Math.toRadians(180)));
        matrixStack.multiply(new Quaternionf().rotateY((float) Math.toRadians(135))); // Adjust this for desired rotation

        EntityRenderDispatcher entityRenderDispatcher = MinecraftClient.getInstance().getEntityRenderDispatcher();
        entityRenderDispatcher.setRenderShadows(false);
        entityRenderDispatcher.render(entity, 0, 0, 0, 0.0F, 1.0F, matrixStack, MinecraftClient.getInstance().getBufferBuilders().getEntityVertexConsumers(), 15728880);
        matrixStack.pop();
    }
}