Create action log panel in HUD

src/main/java/com/bartlomiejpluta/demo/entity/Character.java

@@ -11,7 +11,7 @@ import com.bartlomiejpluta.base.lib.animation.AnimationRunner;
 import com.bartlomiejpluta.demo.runner.DemoRunner;
 import com.bartlomiejpluta.demo.world.weapon.Weapon;
 
-public class Character extends EntityDelegate {
+public abstract class Character extends EntityDelegate {
 	private static final Logger log = LoggerFactory.getLogger(Character.class);
 	protected final Context context;
 	protected final DemoRunner runner;
@@ -72,6 +72,8 @@ public class Character extends EntityDelegate {
 	}
 
 	protected void die() {
-		log.info(toString() + " died with HP = " + hp);
+		log.info(getName() + " died with HP = " + hp);
 	}
+
+	public abstract String getName();
 }

src/main/java/com/bartlomiejpluta/demo/entity/Enemy.java

@@ -23,9 +23,13 @@ public class Enemy extends Character implements NPC {
 	private AI ai = NoopAI.INSTANCE;
 	private final AnimationRunner dieAnimation;
 
+	@Getter
+	private final String name;
+
 	public Enemy(@NonNull Context context, @NonNull EnemyModel template) {
 		super(context, context.createEntity(template.getEntitySet()));
 		this.template = template;
+		name = template.getName();
 		hp = template.getHp();
 		setSpeed(template.getSpeed());
 		setAnimationSpeed(template.getAnimationSpeed());
@@ -58,14 +62,9 @@ public class Enemy extends Character implements NPC {
 
 		ai = NoopAI.INSTANCE;
 
-		getLayer().handleEvent(new EnemyDiedEvent(this));
 		dieAnimation.run(context, getLayer(), this);
 		context.playSound(template.getDieSound());
-	}
-
-	@Override
-	public String toString() {
-		return template.getName() + "@" + hashCode();
+		context.fireEvent(new EnemyDiedEvent(this));
 	}
 
 	public Enemy followAndAttack(Character target, int range) {

src/main/java/com/bartlomiejpluta/demo/entity/Player.java

@@ -17,4 +17,9 @@ public class Player extends Character {
 		super.die();
 		runner.returnToStartMenu();
 	}
+
+	@Override
+	public String getName() {
+		return "Player";
+	}
 }

src/main/java/com/bartlomiejpluta/demo/event/HitEvent.java

@@ -0,0 +1,22 @@
+package com.bartlomiejpluta.demo.event;
+
+import lombok.*;
+
+import com.bartlomiejpluta.base.api.event.*;
+import com.bartlomiejpluta.base.lib.event.*;
+import com.bartlomiejpluta.demo.entity.Character;
+
+@Getter
+@RequiredArgsConstructor
+public class HitEvent extends BaseEvent {
+	public static final EventType<HitEvent> TYPE = new EventType<>("HIT_EVENT");
+
+	private final Character attacker;
+	private final Character target;
+	private final int damage;
+
+	@Override
+	public EventType<HitEvent> getType() {
+		return TYPE;
+	}
+}

src/main/java/com/bartlomiejpluta/demo/gui/HUD.java

@@ -10,19 +10,61 @@ import com.bartlomiejpluta.base.api.input.*;
 import com.bartlomiejpluta.demo.runner.DemoRunner;
 import com.bartlomiejpluta.demo.entity.*;
 
+import com.bartlomiejpluta.demo.event.*;
+import com.bartlomiejpluta.demo.util.LimitedQueue;
+
+import java.util.stream.Collectors;
+
 public class HUD extends BorderLayout {
+	private static final int MAX_LOG_SIZE = 10;
+	private static final float LOG_VISIBILITY_DURATION = 8000f;
+	private static final float LOG_VISIBILITY_FADING_OUT = 1000f;
 	private final DemoRunner runner;
 	private final Player player;
 	private final Runtime runtime;
+	private LimitedQueue<String> log = new LimitedQueue<>(MAX_LOG_SIZE);
+
+	private float logVisibilityDuration = 0f;
 
 	@Ref("debug")
 	private Label debugLbl;
 
+	@Ref("log")
+	private Label logLbl;
+
 	public HUD(Context context, GUI gui) {
 		super(context, gui);
 		this.runner = (DemoRunner) context.getGameRunner();
 		this.player = runner.getPlayer();
 		this.runtime = Runtime.getRuntime();
+		context.addEventListener(HitEvent.TYPE, this::logHitEvent);
+		context.addEventListener(EnemyDiedEvent.TYPE, this::logEnemyDiedEvent);
+	}
+
+	private void logHitEvent(HitEvent event) {
+		log.add(String.format("%s hits %s with damage = %d", event.getAttacker().getName(), event.getTarget().getName(), event.getDamage()));
+		updateLog();
+	}
+
+	private void updateLog() {
+		logLbl.setText(log.stream().collect(Collectors.joining("\n")));
+		logVisibilityDuration = LOG_VISIBILITY_DURATION;
+	}
+
+	private void logEnemyDiedEvent(EnemyDiedEvent event) {
+		log.add(String.format("%s has died with HP = %d", event.getEnemy().getName(), event.getEnemy().getHp()));
+		updateLog();
+	}
+
+	@Override
+	public void update(float dt) {
+		super.update(dt);
+
+		if(logVisibilityDuration > 0) {
+			logVisibilityDuration -= dt * 1000;
+		} else {
+			logVisibilityDuration = 0;
+		}
 	}
 
 	@Override
@@ -41,6 +83,8 @@ public class HUD extends BorderLayout {
 			pos.x(), pos.y())
 		);
 
+		logLbl.setAlpha(Math.min(1f, logVisibilityDuration / LOG_VISIBILITY_FADING_OUT));
+
 		super.draw(screen, gui);
 	}
 }

src/main/java/com/bartlomiejpluta/demo/util/LimitedQueue.java

@@ -0,0 +1,20 @@
+package com.bartlomiejpluta.demo.util;
+
+import lombok.*;
+import java.util.LinkedList;
+
+@AllArgsConstructor
+public class LimitedQueue<E> extends LinkedList<E> {
+	private int limit;
+
+	@Override
+	public boolean add(E o) {
+		super.add(o);
+
+		while (size() > limit) {
+			super.remove();
+		}
+
+		return true;
+	}
+}

src/main/java/com/bartlomiejpluta/demo/world/weapon/MeleeWeapon.java

@@ -10,6 +10,8 @@ import com.bartlomiejpluta.demo.database.model.MeleeWeaponModel;
 import com.bartlomiejpluta.demo.entity.Character;
 import com.bartlomiejpluta.demo.util.DiceRoller;
 
+import com.bartlomiejpluta.demo.event.HitEvent;
+
 public class MeleeWeapon implements Weapon {
 	private final Random random = new Random();
 	private final Context context;
@@ -43,9 +45,12 @@ public class MeleeWeapon implements Weapon {
 		var facingNeighbour = attacker.getCoordinates().add(attacker.getFaceDirection().vector, new Vector2i());
 		for(var entity : attacker.getLayer().getEntities()) {
 			if(entity.getCoordinates().equals(facingNeighbour) && entity.isBlocking() && entity instanceof Character) {
-				((Character) entity).hit(roller.roll());
-				animation.run(context, entity.getLayer(), entity);
+				var character = (Character) entity;
+				var damage = roller.roll();
+				character.hit(damage);
+				animation.run(context, character.getLayer(), character);
 				context.playSound(sound);
+				context.fireEvent(new HitEvent(attacker, character, damage));
 				return true;
 			}
 		}

src/main/java/com/bartlomiejpluta/demo/world/weapon/RangedWeapon.java

@@ -5,12 +5,14 @@ import java.util.Random;
 import lombok.*;
 import com.bartlomiejpluta.base.api.context.Context;
 import com.bartlomiejpluta.base.api.entity.Entity;
-import com.bartlomiejpluta.base.api.move.Direction;
+import com.bartlomiejpluta.base.api.move.*;
 import com.bartlomiejpluta.base.lib.animation.*;
 import com.bartlomiejpluta.demo.database.model.RangedWeaponModel;
 import com.bartlomiejpluta.demo.entity.Character;
 import com.bartlomiejpluta.demo.util.DiceRoller;
 
+import com.bartlomiejpluta.demo.event.HitEvent;
+
 public class RangedWeapon implements Weapon {
 	private final Random random = new Random();
 	private final Context context;
@@ -44,12 +46,14 @@ public class RangedWeapon implements Weapon {
 		this.punchSound = template.getPunchSound();
 	}
 
-	private void onHit(Entity entity) {
-		if(entity.isBlocking() && entity instanceof Character) {
-			var character = (Character) entity;
-			character.hit(roller.roll());
+	private void onHit(Movable attacker, Entity target) {
+		if(target.isBlocking() && target instanceof Character) {
+			var character = (Character) target;
+			var damage = roller.roll();
+			character.hit(damage);
 			punchAnimation.run(context, character.getLayer(), character);
 			context.playSound(punchSound);
+			context.fireEvent(new HitEvent((Character) attacker, character, damage));
 		}
 	}
 

widgets/00bd0625-b3b8-4abf-97b7-91f42bce28ec.xml

@@ -8,6 +8,21 @@
 	width="1f"
 	height="1f">
 
+	<base:BorderLayout-BottomLeft>
+
+		<base:Label
+			ref="log"
+			font="&quot;2261c04f-b02e-4486-b388-8a0fa41622e9&quot;"
+			widthMode="SizeMode.ABSOLUTE"
+			width="400f"
+			height="25f"
+			margin="10f"
+			alignment="GUI.ALIGN_BOTTOM | GUI.ALIGN_LEFT"
+			color="0xFFFFFF"
+			fontSize="15f"/>
+
+	</base:BorderLayout-BottomLeft>
+
 	<base:BorderLayout-BottomRight>
 
 		<base:Label