Add support for enemies' loot

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

@@ -55,8 +55,8 @@ public class EquipmentWindow extends DecoratedWindow {
    }
 
    @Override
-   public void onOpen(WindowManager manager) {
-      super.onOpen(manager);
+   public void onOpen(WindowManager manager, Object... args) {
+      super.onOpen(manager, args);
 
       cancelBtn.setAction(manager::close);
       eqGrid.setOnSelect(this::updateItemDetails);
@@ -72,14 +72,14 @@ public class EquipmentWindow extends DecoratedWindow {
       for (var child : eqGrid.getChildren()) {
          var slot = (ItemIconView) child;
          slot.setItem(player.getEquipmentItem(i++));
-         slot.setAction(handleItem(slot));
+         slot.setAction(handleClick(slot));
       }
 
       weapon.setItem(player.getWeapon());
       ammo.setItem(player.getAmmunition());
    }
 
-   private Consumer<Item> handleItem(ItemIconView slot) {
+   private Consumer<Item> handleClick(ItemIconView slot) {
       return item -> {
          useBtn.setText(getButtonTitle(item));
          eqItemMenu.select(0);

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

@@ -0,0 +1,83 @@
+package com.bartlomiejpluta.demo.gui;
+
+import com.bartlomiejpluta.base.api.context.Context;
+import com.bartlomiejpluta.base.api.gui.*;
+import com.bartlomiejpluta.base.lib.gui.VGridOptionChoice;
+import com.bartlomiejpluta.demo.entity.Enemy;
+import com.bartlomiejpluta.demo.entity.Player;
+import com.bartlomiejpluta.demo.runner.DemoRunner;
+import com.bartlomiejpluta.demo.world.item.Item;
+
+import java.util.Map;
+
+public class LootWindow extends DecoratedWindow implements Inflatable {
+   private final Player player;
+
+   @Ref("loot")
+   private VGridOptionChoice lootMenu;
+
+   private Item[] loot;
+
+   private ItemIconView[] slots = new ItemIconView[Enemy.MAX_LOOT];
+
+   public LootWindow(Context context, GUI gui, Map<String, Component> refs) {
+      super(context, gui, refs);
+      this.player = ((DemoRunner) context.getGameRunner()).getPlayer();
+   }
+
+   @Override
+   public void onInflate() {
+      for (int i = 0; i < Enemy.MAX_LOOT; ++i) {
+         var itemView = new ItemIconView(context, gui, Map.of());
+         itemView.setMargin(5f);
+         lootMenu.add(itemView);
+         slots[i] = itemView;
+         itemView.setAction(this::handleClick);
+      }
+   }
+
+   @Override
+   public void onOpen(WindowManager manager, Object[] args) {
+      super.onOpen(manager, args);
+
+      var creature = (Enemy) args[0];
+      this.loot = creature.getLoot();
+      updateSlots();
+   }
+
+   @Override
+   public void onClose(WindowManager manager) {
+      super.onClose(manager);
+
+      clearSlots();
+      this.loot = null;
+   }
+
+   private void handleClick(Item item) {
+      if (item == null) {
+         return;
+      }
+
+      if (player.pushItemToEquipment(item)) {
+         for (int i = 0; i < Enemy.MAX_LOOT; i++) {
+            if (loot[i] == item) {
+               loot[i] = null;
+               slots[i].setItem(null);
+               break;
+            }
+         }
+      }
+   }
+
+   private void updateSlots() {
+      for (int i = 0; i < Enemy.MAX_LOOT; ++i) {
+         slots[i].setItem(loot[i]);
+      }
+   }
+
+   private void clearSlots() {
+      for (var slot : slots) {
+         slot.setItem(null);
+      }
+   }
+}