added trading system

src/de/miaurizius/jgame2d/core/UI.java

@@ -2,6 +2,7 @@ package de.miaurizius.jgame2d.core;
 
 import de.miaurizius.jgame2d.core.enums.GameState;
 import de.miaurizius.jgame2d.entity.Entity;
+import de.miaurizius.jgame2d.entity.item.CoinObj;
 import de.miaurizius.jgame2d.entity.item.HeartObj;
 
 import java.awt.*;
@@ -16,13 +17,19 @@ public class UI {
     GamePanel panel;
     Graphics2D graphics2d;
     Font font;
-    BufferedImage heart_full, heart_half, heart_blank;
+    BufferedImage heart_full, heart_half, heart_blank, coin;
     ArrayList<String> messages = new ArrayList<>();
     ArrayList<Integer> messageCounter = new ArrayList<>();
-    public OptionState optionState;
     public String currentDialogue;
+    public Entity tradingNPC;
     public int commandNum;
-    public int slotCol, slotRow;
+    public int playerSlotCol, playerSlotRow;
+    public int npcSlotCol, npcSlotRow;
+    private int transCounter;
+
+    // SUB-STATES
+    public TradeState tradeState = TradeState.SELECT;
+    public OptionState optionState;
 
     public UI(GamePanel panel) {
         this.panel = panel;
@@ -38,6 +45,8 @@ public class UI {
         heart_full = heart.image;
         heart_half = heart.image2;
         heart_blank = heart.image3;
+        Entity coin = new CoinObj(panel);
+        this.coin = coin.down1;
     }
 
     public void draw(Graphics2D graphics2d) {
@@ -47,12 +56,14 @@ public class UI {
 
         if(panel.gameState == null) return;
         switch (panel.gameState) {
-            case GameState.PLAY -> drawPlayScreen();
-            case GameState.PAUSE -> drawPauseScreen();
-            case GameState.DIALOGUE -> drawDialogueScreen();
+            case PLAY -> drawPlayScreen();
+            case PAUSE -> drawPauseScreen();
+            case DIALOGUE -> drawDialogueScreen();
             case TITLE -> drawTitleScreen();
             case CHARACTER -> drawCharacterScreen();
             case GAMEOVER -> drawGameOverScreen();
+            case TRANSITION -> drawTransitionScreen();
+            case TRADE -> drawTradeScreen();
         }
     }
 
@@ -150,12 +161,26 @@ public class UI {
         textY += panel.tileSize;
         graphics2d.drawImage(panel.player.currentShield.down1, tailX - panel.tileSize, textY-14, null);
     }
-    private void drawInventory() {
+    private void drawInventory(Entity entity, boolean cursor) {
+        int frameX, frameY, frameWidth, frameHeight;
+        int slotCol, slotRow;
+
         // DRAW FRAME
-        int frameX = panel.tileSize*12;
-        int frameY = panel.tileSize;
-        int frameWidth = panel.tileSize*6;
-        int frameHeight = panel.tileSize*5;
+        if(entity == panel.player) {
+            frameX = panel.tileSize*12;
+            frameY = panel.tileSize;
+            frameWidth = panel.tileSize*6;
+            frameHeight = panel.tileSize*5;
+            slotCol = playerSlotCol;
+            slotRow = playerSlotRow;
+        } else {
+            frameX = panel.tileSize*2;
+            frameY = panel.tileSize;
+            frameWidth = panel.tileSize*6;
+            frameHeight = panel.tileSize*5;
+            slotCol = npcSlotCol;
+            slotRow = npcSlotRow;
+        }
         drawSubWindow(frameX, frameY, frameWidth, frameHeight);
 
         // SLOT
@@ -165,15 +190,15 @@ public class UI {
         int slotY = slotYStart;
         int slotSize = panel.tileSize+3;
 
-        // DRAW PLAYER ITEMS
-        for(int i = 0; i < panel.player.inventory.size(); i++) {
+        // DRAW ITEMS
+        for(int i = 0; i < entity.inventory.size(); i++) {
 
             // EQUIP CURSOR
-            if(panel.player.inventory.get(i) == panel.player.currentWeapon ||  panel.player.inventory.get(i) == panel.player.currentShield) {
+            if(entity.inventory.get(i) == entity.currentWeapon ||  entity.inventory.get(i) == entity.currentShield) {
                 graphics2d.setColor(new Color(240, 190,90));
                 graphics2d.fillRoundRect(slotX, slotY, panel.tileSize, panel.tileSize, 10, 10);
             }
-            graphics2d.drawImage(panel.player.inventory.get(i).down1, slotX, slotY, null);
+            graphics2d.drawImage(entity.inventory.get(i).down1, slotX, slotY, null);
             slotX += slotSize;
             if (i == 4 || i == 9 || i == 14) {
                 slotX = slotXStart;
@@ -182,17 +207,17 @@ public class UI {
         }
 
         // CURSOR
+        if(!cursor) return;
         int curserX = slotXStart + (slotSize*slotCol);
         int curserY = slotYStart + (slotSize*slotRow);
         int curserHeight = panel.tileSize;
         int curserWidth = panel.tileSize;
-
         graphics2d.setColor(Color.white);
         graphics2d.setStroke(new BasicStroke(3));
         graphics2d.drawRoundRect(curserX, curserY, curserWidth, curserHeight, 10, 10);
 
         // DESCRIPTION FRAME
-        int itemIndex = getItemIndex();
+        int itemIndex = getItemIndex(slotCol, slotRow);
         int dFrameX = frameX;
         int dFrameY = frameY + frameHeight+2;
         int dFrameWidth = frameWidth;
@@ -202,9 +227,9 @@ public class UI {
         int textX = dFrameX + 20;
         int textY = dFrameY + panel.tileSize;
         graphics2d.setFont(graphics2d.getFont().deriveFont(28F));
-        if(itemIndex < panel.player.inventory.size()) {
+        if(itemIndex < entity.inventory.size()) {
             drawSubWindow(dFrameX, dFrameY, dFrameWidth, dFrameHeight);
-            for(String line : panel.player.inventory.get(itemIndex).description.split("\n")) {
+            for(String line : entity.inventory.get(itemIndex).description.split("\n")) {
                 graphics2d.drawString(line, textX, textY);
                 textY += 32;
             }
@@ -289,7 +314,7 @@ public class UI {
     }
     private void drawCharacterScreen() {
         drawCharStats();
-        drawInventory();
+        drawInventory(panel.player, true);
     }
     private void drawPlayScreen() {
         drawPlayerLife();
@@ -327,6 +352,157 @@ public class UI {
         graphics2d.drawString(text, x, y);
         if(commandNum == 1)  graphics2d.drawString(">", x-panel.tileSize, y);
     }
+    private void drawTransitionScreen() {
+        transCounter++;
+        graphics2d.setColor(new Color(0,0,0, transCounter*5));
+        graphics2d.fillRect(0, 0, panel.screenWidth, panel.screenHeight);
+        if(transCounter != 50) return;
+        transCounter = 0;
+        panel.gameState = GameState.PLAY;
+        panel.currentMap = panel.eventH.tempMap;
+        panel.player.worldX = panel.tileSize * panel.eventH.tempCol;
+        panel.player.worldY = panel.tileSize * panel.eventH.tempRow;
+        panel.eventH.prevEventX = panel.player.worldX;
+        panel.eventH.prevEventY = panel.player.worldY;
+    }
+    private void drawTradeScreen() {
+        switch(tradeState) {
+            case SELECT -> tradeSelect();
+            case BUY -> tradeBuy();
+            case SELL -> tradeSell();
+        }
+        panel.keyH.spacePressed = false;
+    }
+
+    // TRADING
+    private void tradeSelect() {
+        drawDialogueScreen();
+
+        int x = panel.tileSize*15;
+        int y = panel.tileSize*4;
+        int width = panel.tileSize*3;
+        int height = (int)(panel.tileSize*3.5);
+        drawSubWindow(x, y, width, height);
+
+        // DRAW TEXTS
+        x += panel.tileSize;
+        y += panel.tileSize;
+        graphics2d.drawString("Buy",x , y);
+        if(commandNum == 0) {
+            graphics2d.drawString(">", x-panel.tileSize/2, y);
+            if(panel.keyH.spacePressed) tradeState = TradeState.BUY;
+        }
+        y += panel.tileSize;
+
+        graphics2d.drawString("Sell",x , y);
+        if(commandNum == 1) {
+            graphics2d.drawString(">", x-panel.tileSize/2, y);
+            if(panel.keyH.spacePressed) tradeState = TradeState.SELL;
+        }
+        y += panel.tileSize;
+
+        graphics2d.drawString("Leave",x , y);
+        if(commandNum == 2) {
+            graphics2d.drawString(">", x-panel.tileSize/2, y);
+            if(panel.keyH.spacePressed) {
+                commandNum = 0;
+                tradeState = TradeState.SELECT;
+                panel.gameState = GameState.DIALOGUE;
+                currentDialogue = "Come again, hehe!";
+            }
+        }
+    }
+    private void tradeBuy() {
+        drawInventory(panel.player, false);
+        drawInventory(tradingNPC, true);
+
+        // HINT WINDOW
+        int x = panel.tileSize*2;
+        int y = panel.tileSize*9;
+        int width = panel.tileSize*6;
+        int height = panel.tileSize*2;
+        drawSubWindow(x, y, width, height);
+        graphics2d.drawString("[ESC] Back", x+panel.tileSize, y+60);
+
+        // PLAYER COINS
+        x = panel.tileSize*12;
+        drawSubWindow(x, y, width, height);
+        graphics2d.drawString("Your Coins: " + panel.player.coins, x+panel.tileSize, y+60);
+
+        // PRICE WINDOW
+        int itemIndex = getItemIndex(npcSlotCol, npcSlotRow);
+        if(itemIndex < tradingNPC.inventory.size()) {
+            x = (int)(panel.tileSize*5.5);
+            y = (int)(panel.tileSize*5.5);
+            width = (int)(panel.tileSize*2.5);
+            height = panel.tileSize;
+            drawSubWindow(x, y, width, height);
+            graphics2d.drawImage(coin, x+10, y+8, 32, 32, null);
+            String price = String.valueOf(tradingNPC.inventory.get(itemIndex).price);
+            graphics2d.drawString(price, getAlignedToRightX(price, panel.tileSize*8-20), y+34);
+
+            // BUY
+            if(!panel.keyH.spacePressed) return;
+            if(tradingNPC.inventory.get(itemIndex).price > panel.player.coins) {
+                tradeState = TradeState.SELECT;
+                panel.gameState = GameState.DIALOGUE;
+                currentDialogue = "You need more coins to buy that!";
+                drawDialogueScreen();
+                return;
+            }
+            if(panel.player.inventory.size() == panel.player.maxInvSize) {
+                tradeState = TradeState.SELECT;
+                panel.gameState = GameState.DIALOGUE;
+                currentDialogue = "Your inventory is full!";
+                drawDialogueScreen();
+                return;
+            }
+            panel.player.coins -= tradingNPC.inventory.get(itemIndex).price;
+            panel.player.inventory.add(tradingNPC.inventory.get(itemIndex));
+        }
+    }
+    private void tradeSell() {
+        drawInventory(panel.player, true);
+        int x, y, width, height;
+
+        // HINT WINDOW
+        x = panel.tileSize*2;
+        y = panel.tileSize*9;
+        width = panel.tileSize*6;
+        height = panel.tileSize*2;
+        drawSubWindow(x, y, width, height);
+        graphics2d.drawString("[ESC] Back", x+panel.tileSize, y+60);
+
+        // PLAYER COINS
+        x = panel.tileSize*12;
+        drawSubWindow(x, y, width, height);
+        graphics2d.drawString("Your Coins: " + panel.player.coins, x+panel.tileSize, y+60);
+
+        // PRICE WINDOW
+        int itemIndex = getItemIndex(playerSlotCol, playerSlotRow);
+        if(itemIndex < panel.player.inventory.size()) {
+            x = (int)(panel.tileSize*15.5);
+            y = (int)(panel.tileSize*5.5);
+            width = (int)(panel.tileSize*2.5);
+            height = panel.tileSize;
+            drawSubWindow(x, y, width, height);
+            graphics2d.drawImage(coin, x+10, y+8, 32, 32, null);
+            String price = String.valueOf(panel.player.inventory.get(itemIndex).price/2);
+            graphics2d.drawString(price, getAlignedToRightX(price, panel.tileSize*18-20), y+34);
+
+            // SELL
+            if(!panel.keyH.spacePressed) return;
+            if(panel.player.inventory.get(itemIndex) == panel.player.currentWeapon || panel.player.inventory.get(itemIndex) == panel.player.currentShield) {
+                commandNum = 0;
+                tradeState = TradeState.SELECT;
+                panel.gameState = GameState.DIALOGUE;
+                currentDialogue = "You cannot sell an equipped item!";
+                return;
+            }
+            panel.player.inventory.remove(itemIndex);
+            panel.player.coins += Integer.parseInt(price);
+        }
+    }
 
     // UTILITY
     private void drawSubWindow(int x, int y, int width, int height) {
@@ -342,7 +518,7 @@ public class UI {
     private int getAlignedToRightX(String text, int tailX) {
         return tailX - (int) graphics2d.getFontMetrics().getStringBounds(text, graphics2d).getWidth();
     }
-    public int getItemIndex() {
+    public int getItemIndex(int slotCol, int slotRow) {
         return slotCol + slotRow *5;
     }
     public void addMessage(String text) {
@@ -526,5 +702,9 @@ public class UI {
         CONTROLS,
         QUITNF;
     }
-
+    public enum TradeState {
+        SELECT,
+        BUY,
+        SELL;
+    }
 }

src/de/miaurizius/jgame2d/core/enums/GameState.java

@@ -2,11 +2,16 @@ package de.miaurizius.jgame2d.core.enums;
 
 public enum GameState {
 
+    // SCENES
     PLAY,
     PAUSE,
-    DIALOGUE,
     TITLE,
-    CHARACTER,
+
+    // IN-GAME
+    CHARACTER, //inventory
+    DIALOGUE,
     GAMEOVER,
+    TRANSITION,
+    TRADE,
 
 }

src/de/miaurizius/jgame2d/core/handlers/AssetSetter.java

@@ -3,6 +3,7 @@ package de.miaurizius.jgame2d.core.handlers;
 import de.miaurizius.jgame2d.core.GamePanel;
 import de.miaurizius.jgame2d.core.enums.Map;
 import de.miaurizius.jgame2d.entity.item.*;
+import de.miaurizius.jgame2d.entity.npc.MerchantNPC;
 import de.miaurizius.jgame2d.entity.npc.OldManNPC;
 import de.miaurizius.jgame2d.entity.monster.GreenSlimeMON;
 import de.miaurizius.jgame2d.tile.interactive.DryTreeTI;
@@ -48,7 +49,7 @@ public class AssetSetter {
         panel.npc[Map.OVERWORLD.getIndex()][0].worldX = panel.tileSize*21;
         panel.npc[Map.OVERWORLD.getIndex()][0].worldY = panel.tileSize*21;
 
-        panel.npc[Map.HUT.getIndex()][0] = new OldManNPC(panel);
+        panel.npc[Map.HUT.getIndex()][0] = new MerchantNPC(panel);
         panel.npc[Map.HUT.getIndex()][0].worldX = panel.tileSize*12;
         panel.npc[Map.HUT.getIndex()][0].worldY = panel.tileSize*7;
     }

src/de/miaurizius/jgame2d/core/handlers/EventHandler.java

@@ -4,6 +4,7 @@ import de.miaurizius.jgame2d.core.GamePanel;
 import de.miaurizius.jgame2d.core.enums.Direction;
 import de.miaurizius.jgame2d.core.enums.GameState;
 import de.miaurizius.jgame2d.core.enums.Map;
+import de.miaurizius.jgame2d.entity.Entity;
 
 import java.awt.*;
 
@@ -11,9 +12,13 @@ public class EventHandler {
 
     GamePanel panel;
     EventRect[][][] eventRect;
-    int prevEventX, prevEventY;
+    public int prevEventX, prevEventY;
     boolean canTouchEvent = true;
 
+    // TMP VARS FOR TRANSITION
+    public int tempCol, tempRow;
+    public Map tempMap;
+
     public EventHandler(GamePanel panel) {
         this.panel = panel;
         eventRect = new EventRect[Map.values().length][panel.maxWorldCol][panel.maxWorldRow];
@@ -49,18 +54,22 @@ public class EventHandler {
         if(distance > panel.tileSize) canTouchEvent = true;
         if(!canTouchEvent) return;
 
-        if(hit(Map.OVERWORLD, 27,16, Direction.RIGHT)) damagePit(GameState.DIALOGUE);
-        else if(hit(Map.OVERWORLD, 23,12, null)) healingPool(GameState.DIALOGUE);
+        // PIT/POOL TESTS
+        if(hit(Map.OVERWORLD, 27,16, Direction.RIGHT)) damagePit();
+        else if(hit(Map.OVERWORLD, 23,12, null)) healingPool();
 
         // HUT
         else if(hit(Map.OVERWORLD, 10, 39, null)) changeMap(Map.HUT, 12, 13);
         else if(hit(Map.HUT, 12, 13, null)) changeMap(Map.OVERWORLD, 10, 39);
+
+        // ADVANCED SPEAKING
+        else if(hit(Map.HUT, 12, 9, Direction.UP)) speak(panel.npc[Map.HUT.getIndex()][0]);
     }
 
     /**
      * @param reqDirection Set to null if no direction is required
      */
-    public boolean hit(Map map, int eventCol, int eventRow, Direction reqDirection) {
+    private boolean hit(Map map, int eventCol, int eventRow, Direction reqDirection) {
         boolean hit = false;
         panel.player.solidArea.x = panel.player.worldX + panel.player.solidArea.x;
         panel.player.solidArea.y = panel.player.worldY + panel.player.solidArea.y;
@@ -82,16 +91,16 @@ public class EventHandler {
         return hit;
     }
 
-    public void damagePit(GameState gameState) {
-        panel.gameState = gameState;
+    private void damagePit() {
+        panel.gameState = GameState.DIALOGUE;
         panel.playSE(6);
         panel.ui.currentDialogue = "You have fallen into a pit!";
         panel.player.life -= 1;
         canTouchEvent = false;
     }
-    public void healingPool(GameState gameState) {
+    private void healingPool() {
         if(!panel.keyH.spacePressed) return;
-        panel.gameState = gameState;
+        panel.gameState = GameState.DIALOGUE;
         panel.player.attackCancel = true;
         panel.playSE(2);
         panel.ui.currentDialogue = "You drank the holy water.\nYour life has been recovered!\nBut all monsters respawned... \nGood luck!";
@@ -99,15 +108,20 @@ public class EventHandler {
         canTouchEvent = false;
         panel.assetSetter.setMonster();
     }
-    public void changeMap(Map map, int col, int row) {
-        panel.currentMap = map;
-        panel.player.worldX = panel.tileSize*col;
-        panel.player.worldY = panel.tileSize*row;
-        prevEventX = panel.player.worldX;
-        prevEventY = panel.player.worldY;
+    private void changeMap(Map map, int col, int row) {
+        panel.gameState = GameState.TRANSITION;
+        tempMap = map;
+        tempCol = col;
+        tempRow = row;
         canTouchEvent = false;
         panel.playSE(13);
     }
+    private void speak(Entity entity) {
+        if(!panel.keyH.spacePressed) return;
+        panel.gameState = GameState.DIALOGUE;
+        panel.player.attackCancel = true;
+        entity.speak();
+    }
 
     static private class EventRect extends Rectangle {
         int eventRectDefaultX, eventRectDefaultY;

src/de/miaurizius/jgame2d/core/handlers/KeyHandler.java

@@ -124,38 +124,11 @@ public class KeyHandler implements KeyListener {
     }
     private void handleCharacter(int code) {
         switch (code) {
-            case KeyEvent.VK_UP:
-                if(panel.ui.slotRow == 0) break;
-                if(panel.sfx.clips[9].isRunning()) break;
-                panel.ui.slotRow--;
-                panel.playSE(9);
-                break;
-            case KeyEvent.VK_DOWN:
-                if(panel.ui.slotRow == 3) break;
-                if(panel.sfx.clips[9].isRunning()) break;
-                panel.ui.slotRow++;
-                panel.playSE(9);
-                break;
-            case KeyEvent.VK_LEFT:
-                if(panel.ui.slotCol == 0) break;
-                if(panel.sfx.clips[9].isRunning()) break;
-                panel.ui.slotCol--;
-                panel.playSE(9);
-                break;
-            case KeyEvent.VK_RIGHT:
-                if(panel.ui.slotCol == 4) break;
-                if(panel.sfx.clips[9].isRunning()) break;
-                panel.ui.slotCol++;
-                panel.playSE(9);
-                break;
+            case KeyEvent.VK_UP, KeyEvent.VK_DOWN, KeyEvent.VK_LEFT, KeyEvent.VK_RIGHT -> playerInventory(code);
+            case KeyEvent.VK_SPACE -> panel.player.selectItem();
 
-            case KeyEvent.VK_SPACE:
-                panel.player.selectItem();
-                break;
             // EXIT STATE
-            case KeyEvent.VK_C, KeyEvent.VK_ESCAPE:
-                panel.gameState = GameState.PLAY;
-                break;
+            case KeyEvent.VK_C, KeyEvent.VK_ESCAPE -> panel.gameState = GameState.PLAY;
         }
     }
     private void handleGameOver(int code) {
@@ -183,6 +156,89 @@ public class KeyHandler implements KeyListener {
                 }
         }
     }
+    private void handleTrade(int code) {
+        if(code == KeyEvent.VK_SPACE) spacePressed = true;
+        if(panel.ui.tradeState == UI.TradeState.SELECT) {
+            switch (code) {
+                case KeyEvent.VK_UP:
+                    if (panel.ui.commandNum <= 0) break;
+                    panel.ui.commandNum--;
+                    panel.playSE(9);
+                    break;
+                case KeyEvent.VK_DOWN:
+                    if (panel.ui.commandNum >= 2) break;
+                    panel.ui.commandNum++;
+                    panel.playSE(9);
+                    break;
+            }
+        }
+        if(panel.ui.tradeState == UI.TradeState.BUY) {
+            npcInventory(code);
+            if(code == KeyEvent.VK_ESCAPE) panel.ui.tradeState = UI.TradeState.SELECT;
+        }
+        if(panel.ui.tradeState == UI.TradeState.SELL) {
+            playerInventory(code);
+            if(code == KeyEvent.VK_ESCAPE) panel.ui.tradeState = UI.TradeState.SELECT;
+        }
+    }
+
+    // UTILITY
+    private void playerInventory(int code) {
+        switch (code) {
+            case KeyEvent.VK_UP:
+                if(panel.ui.playerSlotRow == 0) break;
+                if(panel.sfx.clips[9].isRunning()) break;
+                panel.ui.playerSlotRow--;
+                panel.playSE(9);
+                break;
+            case KeyEvent.VK_DOWN:
+                if(panel.ui.playerSlotRow == 3) break;
+                if(panel.sfx.clips[9].isRunning()) break;
+                panel.ui.playerSlotRow++;
+                panel.playSE(9);
+                break;
+            case KeyEvent.VK_LEFT:
+                if(panel.ui.playerSlotCol == 0) break;
+                if(panel.sfx.clips[9].isRunning()) break;
+                panel.ui.playerSlotCol--;
+                panel.playSE(9);
+                break;
+            case KeyEvent.VK_RIGHT:
+                if(panel.ui.playerSlotCol == 4) break;
+                if(panel.sfx.clips[9].isRunning()) break;
+                panel.ui.playerSlotCol++;
+                panel.playSE(9);
+                break;
+        }
+    }
+    private void npcInventory(int code) {
+        switch (code) {
+            case KeyEvent.VK_UP:
+                if(panel.ui.npcSlotRow == 0) break;
+                if(panel.sfx.clips[9].isRunning()) break;
+                panel.ui.npcSlotRow--;
+                panel.playSE(9);
+                break;
+            case KeyEvent.VK_DOWN:
+                if(panel.ui.npcSlotRow == 3) break;
+                if(panel.sfx.clips[9].isRunning()) break;
+                panel.ui.npcSlotRow++;
+                panel.playSE(9);
+                break;
+            case KeyEvent.VK_LEFT:
+                if(panel.ui.npcSlotCol == 0) break;
+                if(panel.sfx.clips[9].isRunning()) break;
+                panel.ui.npcSlotCol--;
+                panel.playSE(9);
+                break;
+            case KeyEvent.VK_RIGHT:
+                if(panel.ui.npcSlotCol == 4) break;
+                if(panel.sfx.clips[9].isRunning()) break;
+                panel.ui.npcSlotCol++;
+                panel.playSE(9);
+                break;
+        }
+    }
 
     // KEY-LISTENER
     @Override
@@ -197,6 +253,7 @@ public class KeyHandler implements KeyListener {
             case PAUSE -> handlePause(code);
             case CHARACTER -> handleCharacter(code);
             case GAMEOVER -> handleGameOver(code);
+            case TRADE -> handleTrade(code);
         }
     }
     @Override

src/de/miaurizius/jgame2d/entity/Entity.java

@@ -13,6 +13,7 @@ import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.logging.Level;
 
 public class Entity {
@@ -66,6 +67,8 @@ public class Entity {
     public Entity currentWeapon;
     public Entity currentShield;
     public Projectile projectile;
+    public ArrayList<Entity> inventory = new ArrayList<>();
+    public final int maxInvSize = 20;
 
     // ITEM ATTRIBUTES
     public EntityType.WeaponType weaponType;
@@ -74,6 +77,7 @@ public class Entity {
     public String description;
     public int useCost;
     public int value;
+    public int price;
 
     public Entity(GamePanel panel) {
         this.panel = panel;
@@ -102,7 +106,7 @@ public class Entity {
         }
 
         spriteCounter++;
-        if(spriteCounter > 12) {
+        if(spriteCounter > 24) {
             if(spriteNum == 1) spriteNum = 2;
             else if(spriteNum == 2) spriteNum = 1;
             else spriteNum = 0;

src/de/miaurizius/jgame2d/entity/Player.java

@@ -4,13 +4,13 @@ import de.miaurizius.jgame2d.core.*;
 import de.miaurizius.jgame2d.core.enums.Direction;
 import de.miaurizius.jgame2d.core.enums.EntityType;
 import de.miaurizius.jgame2d.core.enums.GameState;
+import de.miaurizius.jgame2d.core.enums.Map;
 import de.miaurizius.jgame2d.core.handlers.KeyHandler;
 import de.miaurizius.jgame2d.entity.item.ShieldWoodObj;
 import de.miaurizius.jgame2d.entity.item.SwordNormalObj;
 import de.miaurizius.jgame2d.entity.projectile.FireballObj;
 
 import java.awt.*;
-import java.util.ArrayList;
 
 public class Player extends Entity {
 
@@ -20,8 +20,6 @@ public class Player extends Entity {
 
     // STATE
     public boolean attackCancel;
-    public ArrayList<Entity> inventory = new ArrayList<>();
-    public final int maxInvSize = 20;
 
     public Player(GamePanel panel, KeyHandler keyH) {
         super(panel);
@@ -264,7 +262,7 @@ public class Player extends Entity {
         panel.ui.currentDialogue = "You are level " + level + " now!\nYou feel stronger!";
     }
     public void selectItem() {
-        int itemIndex = panel.ui.getItemIndex();
+        int itemIndex = panel.ui.getItemIndex(panel.ui.playerSlotCol, panel.ui.playerSlotRow);
         if(itemIndex >= inventory.size()) return;
         Entity selectedItem = inventory.get(itemIndex);
         if(selectedItem.type == EntityType.WEAPON) {
@@ -295,6 +293,11 @@ public class Player extends Entity {
     public void setDefaultValues() {
         worldX = panel.tileSize * 23;
         worldY = panel.tileSize * 21;
+
+        worldX = panel.tileSize * 12;
+        worldY = panel.tileSize * 12;
+        panel.currentMap = Map.HUT;
+
         speed = 4;
         direction = Direction.DOWN;
 
@@ -306,7 +309,7 @@ public class Player extends Entity {
         dexterity = 1;
         exp = 0;
         nextLevelExp = 5;
-        coins = 0;
+        coins = 500;
         currentWeapon = new SwordNormalObj(panel);
         currentShield = new ShieldWoodObj(panel);
         projectile = new FireballObj(panel);

src/de/miaurizius/jgame2d/entity/item/AxeObj.java

@@ -13,6 +13,7 @@ public class AxeObj extends Entity {
         type = EntityType.WEAPON;
         weaponType = EntityType.WeaponType.AXE;
         down1 = initEntitySprites("/objects/axe");
+        price = 50;
 
         attackValue = 2;
         attackArea.width = 30;

src/de/miaurizius/jgame2d/entity/item/IronShieldObj.java

@@ -14,6 +14,8 @@ public class IronShieldObj extends Entity {
         type = EntityType.SHIELD;
         down1 = initEntitySprites("objects/shield_blue");
         defenseValue = 2;
+
+        price = 50;
     }
 
 }

src/de/miaurizius/jgame2d/entity/item/KeyObj.java

@@ -12,6 +12,8 @@ public class KeyObj extends Entity {
         description = "[" + name + "]\nIt opens a door.";
         type = EntityType.ITEM;
         down1 = initEntitySprites("objects/key");
+
+        price = 50;
     }
 
 }

src/de/miaurizius/jgame2d/entity/item/PotionObj.java

@@ -19,6 +19,8 @@ public class PotionObj extends Entity {
         name = "Red Potion";
         down1 = initEntitySprites("objects/potion_red");
         description = "[" + name + "]\nHeals your life by " + value + ".";
+
+        price = 50;
     }
 
     public void use(Entity entity) {

src/de/miaurizius/jgame2d/entity/item/ShieldWoodObj.java

@@ -13,6 +13,8 @@ public class ShieldWoodObj extends Entity {
         type = EntityType.SHIELD;
         down1 = initEntitySprites("objects/shield_wood");
         defenseValue = 1;
+
+        price = 50;
     }
 
 }

src/de/miaurizius/jgame2d/entity/item/SwordNormalObj.java

@@ -14,6 +14,7 @@ public class SwordNormalObj extends Entity {
         type = EntityType.WEAPON;
         weaponType = EntityType.WeaponType.SWORD;
         down1 = initEntitySprites("objects/sword_normal");
+        price = 50;
 
         attackValue = 1;
         attackArea.width = 36;

src/de/miaurizius/jgame2d/entity/npc/MerchantNPC.java

@@ -0,0 +1,54 @@
+package de.miaurizius.jgame2d.entity.npc;
+
+import de.miaurizius.jgame2d.core.GamePanel;
+import de.miaurizius.jgame2d.core.enums.Direction;
+import de.miaurizius.jgame2d.core.enums.EntityType;
+import de.miaurizius.jgame2d.core.enums.GameState;
+import de.miaurizius.jgame2d.entity.Entity;
+import de.miaurizius.jgame2d.entity.item.*;
+
+public class MerchantNPC extends Entity {
+
+    public MerchantNPC(GamePanel panel) {
+        super(panel);
+        type = EntityType.NPC;
+        name = "merchant-npc";
+
+        direction = Direction.DOWN;
+        speed = 0;
+        getImage();
+        setDialogue();
+        setItems();
+    }
+
+    @Override
+    public void speak() {
+        super.speak();
+        panel.gameState = GameState.TRADE;
+        panel.ui.tradingNPC = this;
+    }
+
+    // SETTING THINGS UP
+    private void getImage()  {
+        up1 = initEntitySprites("npc/merchant_down_1");
+        up2 = initEntitySprites("npc/merchant_down_2");
+        down1 = initEntitySprites("npc/merchant_down_1");
+        down2 = initEntitySprites("npc/merchant_down_2");
+        left1 = initEntitySprites("npc/merchant_down_1");
+        left2 = initEntitySprites("npc/merchant_down_2");
+        right1 = initEntitySprites("npc/merchant_down_1");
+        right2 = initEntitySprites("npc/merchant_down_2");
+    }
+    private void setDialogue() {
+        dialogue[0] = "He he, so you found me. \nI have some good stuff. \nDo you want to trade?";
+    }
+    private void setItems() {
+        inventory.add(new PotionObj(panel));
+        inventory.add(new KeyObj(panel));
+        inventory.add(new SwordNormalObj(panel));
+        inventory.add(new AxeObj(panel));
+        inventory.add(new ShieldWoodObj(panel));
+        inventory.add(new IronShieldObj(panel));
+    }
+
+}

src/de/miaurizius/jgame2d/entity/npc/OldManNPC.java

@@ -20,25 +20,6 @@ public class OldManNPC extends Entity {
         setDialogue();
     }
 
-    public void getImage()  {
-        up1 = initEntitySprites("npc/oldman_up_1");
-        up2 = initEntitySprites("npc/oldman_up_2");
-        down1 = initEntitySprites("npc/oldman_down_1");
-        down2 = initEntitySprites("npc/oldman_down_2");
-        left1 = initEntitySprites("npc/oldman_left_1");
-        left2 = initEntitySprites("npc/oldman_left_2");
-        right1 = initEntitySprites("npc/oldman_right_1");
-        right2 = initEntitySprites("npc/oldman_right_2");
-    }
-
-    public void setDialogue() {
-        dialogue[0] = "Hello, lad.";
-        dialogue[1] = "So you've come to this island to \nfind the treasure?";
-        dialogue[2] = "I used to be a great wizard but now... \nI'm a bit too old for taking an \nadventure.";
-        dialogue[3] = "Well, good luck on you.";
-        dialogue[4] = "I heard drinking the water of the \nholy lake makes you feel fine again...";
-    }
-
     public void setAction() {
         actionLock++;
         if(actionLock != 120) return; //lock action for x frames
@@ -50,4 +31,23 @@ public class OldManNPC extends Entity {
         if(i > 75) direction = Direction.RIGHT;
         actionLock = 0;
     }
+
+    // SETTING THINGS UP
+    private void getImage()  {
+        up1 = initEntitySprites("npc/oldman_up_1");
+        up2 = initEntitySprites("npc/oldman_up_2");
+        down1 = initEntitySprites("npc/oldman_down_1");
+        down2 = initEntitySprites("npc/oldman_down_2");
+        left1 = initEntitySprites("npc/oldman_left_1");
+        left2 = initEntitySprites("npc/oldman_left_2");
+        right1 = initEntitySprites("npc/oldman_right_1");
+        right2 = initEntitySprites("npc/oldman_right_2");
+    }
+    private void setDialogue() {
+        dialogue[0] = "Hello, lad.";
+        dialogue[1] = "So you've come to this island to \nfind the treasure?";
+        dialogue[2] = "I used to be a great wizard but now... \nI'm a bit too old for taking an \nadventure.";
+        dialogue[3] = "Well, good luck on you.";
+        dialogue[4] = "I heard drinking the water of the \nholy lake makes you feel fine again...";
+    }
 }