Added support for entity labels

core/src/com/riiablo/engine/Engine.java

@@ -4,6 +4,7 @@ import com.badlogic.ashley.core.Entity;
 import com.badlogic.ashley.core.PooledEngine;
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.math.MathUtils;
+import com.badlogic.gdx.utils.Align;
 import com.badlogic.gdx.utils.IntIntMap;
 import com.riiablo.Riiablo;
 import com.riiablo.codec.COF;
@@ -19,6 +20,7 @@ import com.riiablo.engine.component.ClassnameComponent;
 import com.riiablo.engine.component.CofComponent;
 import com.riiablo.engine.component.DS1Component;
 import com.riiablo.engine.component.IdComponent;
+import com.riiablo.engine.component.LabelComponent;
 import com.riiablo.engine.component.MapComponent;
 import com.riiablo.engine.component.MonsterComponent;
 import com.riiablo.engine.component.ObjectComponent;
@@ -28,6 +30,7 @@ import com.riiablo.engine.component.WarpComponent;
 import com.riiablo.map.DS1;
 import com.riiablo.map.DT1;
 import com.riiablo.map.Map;
+import com.riiablo.widget.Label;
 
 import org.apache.commons.lang3.StringUtils;
 
@@ -72,6 +75,14 @@ public class Engine extends PooledEngine {
     public static final byte MODE_RN = 15;
   }
 
+  private static Label createLabel(String text) {
+    Label label = new Label(Riiablo.fonts.font16);
+    label.setAlignment(Align.center);
+    label.getStyle().background = Label.MODAL;
+    label.setText(text);
+    return label;
+  }
+
   public Engine() {
     super();
   }
@@ -112,12 +123,20 @@ public class Engine extends PooledEngine {
   private Entity createStaticObject(Map map, Map.Zone zone, DS1 ds1, DS1.Object object, float x, float y) {
     assert object.type == DS1.Object.STATIC_TYPE;
     int id = Riiablo.files.obj.getType2(ds1.getAct(), object.id);
-    Objects.Entry base = Riiablo.files.objects.get(id);
+    final Objects.Entry base = Riiablo.files.objects.get(id);
     if (base == null) {
       Gdx.app.error(TAG, "Unknown static entity id: " + id + "; object=" + object);
       return null;
     }
 
+    String name;
+    if (base.SubClass == 64) {
+      String levelName = Riiablo.string.lookup(zone.level.LevelName);
+      name = String.format("%s\n%s", levelName, Riiablo.string.lookup(base.Name));
+    } else {
+      name = base.Name.equalsIgnoreCase("dummy") ? base.Description : Riiablo.string.lookup(base.Name);
+    }
+
     TypeComponent typeComponent = createComponent(TypeComponent.class);
     typeComponent.type = TypeComponent.Type.OBJ;
 
@@ -145,6 +164,10 @@ public class Engine extends PooledEngine {
     ds1Component.ds1 = ds1;
     ds1Component.object = object;
 
+    LabelComponent labelComponent = createComponent(LabelComponent.class);
+    labelComponent.offset.y = -base.NameOffset;
+    labelComponent.actor = createLabel(name);
+
     Entity entity = createEntity(base.Description);
     entity.add(typeComponent);
     entity.add(cofComponent);
@@ -154,8 +177,9 @@ public class Engine extends PooledEngine {
     entity.add(mapComponent);
     entity.add(ds1Component);
     entity.add(objectComponent);
+    entity.add(labelComponent);
 
-    // flags
+    labelComponent.actor.setUserObject(entity);
 
     return entity;
   }
@@ -170,6 +194,8 @@ public class Engine extends PooledEngine {
 
     MonStats2.Entry monstats2 = Riiablo.files.monstats2.get(monstats.MonStatsEx);
 
+    String name = monstats.NameStr.equalsIgnoreCase("dummy") ? monstats.Id : Riiablo.string.lookup(monstats.NameStr);
+
     MonsterComponent monsterComponent = createComponent(MonsterComponent.class);
     monsterComponent.monstats = monstats;
     monsterComponent.monstats2 = monstats2;
@@ -205,6 +231,10 @@ public class Engine extends PooledEngine {
     PositionComponent positionComponent = createComponent(PositionComponent.class);
     positionComponent.position.set(x, y);
 
+    LabelComponent labelComponent = createComponent(LabelComponent.class);
+    labelComponent.offset.y = monstats2.pixHeight;
+    labelComponent.actor = createLabel(name);
+
     Entity entity = createEntity(monstats.Id);
     entity.add(typeComponent);
     entity.add(cofComponent);
@@ -214,6 +244,9 @@ public class Engine extends PooledEngine {
     entity.add(mapComponent);
     entity.add(ds1Component);
     entity.add(monsterComponent);
+    entity.add(labelComponent);
+
+    labelComponent.actor.setUserObject(entity);
 
     return entity;
   }
@@ -229,6 +262,7 @@ public class Engine extends PooledEngine {
     assert wrp >= 0 : "Invalid warp";
 
     Levels.Entry dstLevel = Riiablo.files.Levels.get(dst);
+    String name = Riiablo.string.lookup(dstLevel.LevelWarp);
 
     LvlWarp.Entry warp = Riiablo.files.LvlWarp.get(wrp);
 
@@ -275,12 +309,19 @@ public class Engine extends PooledEngine {
     BBoxComponent boxComponent = createComponent(BBoxComponent.class);
     boxComponent.box = box;
 
+    LabelComponent labelComponent = createComponent(LabelComponent.class);
+    labelComponent.offset.set(box.xMin + box.width / 2, -box.yMax + box.height);
+    labelComponent.actor = createLabel(name);
+
     Entity entity = createEntity("warp");
     entity.add(typeComponent);
     entity.add(mapComponent);
     entity.add(positionComponent);
     entity.add(warpComponent);
     entity.add(boxComponent);
+    entity.add(labelComponent);
+
+    labelComponent.actor.setUserObject(entity);
 
     return entity;
   }

core/src/com/riiablo/engine/component/LabelComponent.java

@@ -0,0 +1,17 @@
+package com.riiablo.engine.component;
+
+import com.badlogic.ashley.core.Component;
+import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.scenes.scene2d.Actor;
+import com.badlogic.gdx.utils.Pool;
+
+public class LabelComponent implements Component, Pool.Poolable {
+  public Actor actor;
+  public final Vector2 offset = new Vector2();
+
+  @Override
+  public void reset() {
+    actor = null;
+    offset.setZero();
+  }
+}

core/src/com/riiablo/engine/system/LabelSystem.java

@@ -0,0 +1,57 @@
+package com.riiablo.engine.system;
+
+import com.badlogic.ashley.core.ComponentMapper;
+import com.badlogic.ashley.core.Entity;
+import com.badlogic.ashley.core.Family;
+import com.badlogic.ashley.systems.IteratingSystem;
+import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.scenes.scene2d.Actor;
+import com.badlogic.gdx.utils.Align;
+import com.badlogic.gdx.utils.Array;
+import com.riiablo.camera.IsometricCamera;
+import com.riiablo.engine.Flags;
+import com.riiablo.engine.component.LabelComponent;
+import com.riiablo.engine.component.PositionComponent;
+
+public class LabelSystem extends IteratingSystem {
+  private final ComponentMapper<LabelComponent> labelComponent = ComponentMapper.getFor(LabelComponent.class);
+  private final ComponentMapper<PositionComponent> positionComponent = ComponentMapper.getFor(PositionComponent.class);
+
+  private final Vector2 tmpVec2 = new Vector2();
+  private final IsometricCamera iso;
+
+  private final Array<Actor> labels = new Array<>();
+
+  public LabelSystem(IsometricCamera iso) {
+    super(Family.all(PositionComponent.class, LabelComponent.class).get());
+    this.iso = iso;
+    setProcessing(false);
+  }
+
+  @Override
+  public void update(float delta) {
+    labels.clear();
+    super.update(delta);
+  }
+
+  @Override
+  protected void processEntity(Entity entity, float delta) {
+    if ((entity.flags & Flags.SELECTED) != Flags.SELECTED) {
+      return;
+    }
+
+    PositionComponent positionComponent = this.positionComponent.get(entity);
+    iso.toScreen(tmpVec2.set(positionComponent.position));
+
+    LabelComponent labelComponent = this.labelComponent.get(entity);
+    tmpVec2.add(labelComponent.offset);
+
+    Actor actor = labelComponent.actor;
+    actor.setPosition(tmpVec2.x, tmpVec2.y, Align.center);
+    labels.add(actor);
+  }
+
+  public Array<Actor> getLabels() {
+    return labels;
+  }
+}