Creating a Guessing Game

In this chapter we’re going to be creating a guessing game. The screen will have five toggle buttons, and the goal is to get them all to match some randomly selected values. The screen will have an indicator that shows how many of the buttons are correct.

• just a bunch of boxes
• toggle boxes
• random target and checking correctness
• correctness indicator

~import com.teamwizardry.librarianlib.facade.FacadeScreen;
~import com.teamwizardry.librarianlib.facade.layer.GuiLayerEvents;
~import com.teamwizardry.librarianlib.facade.layers.RectLayer;
~import com.teamwizardry.librarianlib.math.Vec2d;
~import net.minecraft.util.text.TranslationTextComponent;
~
~import java.awt.*;
~
public class GuessingGameScreen extends FacadeScreen {
    private final boolean[] currentState = new boolean[5];
    private final boolean[] targetState = new boolean[5];
    private final RectLayer outputRect;

    public GuessingGameScreen() {
        super(new TranslationTextComponent("modid.screen.guessing_game.title"));

        getMain().setSize(new Vec2d(20 * 5 + 2 * 4, 32));

        for(int i = 0; i < 5; i++) {
            targetState[i] = Math.random() < 0.5;

            RectLayer toggle = new RectLayer(Color.BLACK, 22 * i, 0, 20, 20);
            int index = i;
            toggle.hook(GuiLayerEvents.MouseClick.class, (e) -> {
                currentState[index] = !currentState[index];
                toggle.setColor(currentState[index] ? Color.RED : Color.BLACK);
                checkGuesses();
            });
            getMain().add(toggle);
        }

        outputRect = new RectLayer(Color.GREEN, 0, 22, 0, 10);
        getMain().add(new RectLayer(Color.RED, 0, 22, getMain().getWidthi(), 10));
        getMain().add(outputRect);
        checkGuesses();
    }

    private void checkGuesses() {
        int correctGuesses = 0;
        for(int i = 0; i < 5; i++) {
            if(currentState[i] == targetState[i])
                correctGuesses++;
        }

        outputRect.setWidth(getMain().getWidth() * correctGuesses / 5);
    }
}