feat: shop

app/ecs/components/inventory.js

@@ -97,21 +97,25 @@ class ItemProxy {
   get projection() {
     return this.json.projection;
   }
+  get price() {
+    return this.json.price;
+  }
   get qty() {
     return this.instance.slots[this.slot].qty;
   }
   set qty(qty) {
     const {instance} = this;
     if (qty <= 0) {
-      this.Component.markChange(instance.entity, 'cleared', {[this.slot]: true});
-      delete instance.slots[this.slot];
-      delete instance.$$items[this.slot];
+      instance.clear(this.slot);
     }
     else {
       instance.slots[this.slot].qty = qty;
       this.Component.markChange(instance.entity, 'qtyUpdated', {[this.slot]: qty});
     }
   }
+  get source() {
+    return this.instance.slots[this.slot].source;
+  }
 }
 
 export default class Inventory extends Component {
@@ -169,6 +173,11 @@ export default class Inventory extends Component {
     const Component = this;
     return class InventoryInstance extends Instance {
       $$items = {};
+      clear(slot) {
+        Component.markChange(this.entity, 'cleared', {[slot]: true});
+        delete this.slots[slot];
+        delete this.$$items[slot];
+      }
       item(slot) {
         return this.$$items[slot];
       }
@@ -185,7 +194,7 @@ export default class Inventory extends Component {
           if (!slots[slot]) {
             slots[slot] = stack;
             this.$$items[slot] = new ItemProxy(Component, this, slot);
-            await this.$$items[slot].load();
+            await this.$$items[slot].load(stack.source);
             Component.markChange(this.entity, 'given', {[slot]: slots[slot]});
             return;
           }

app/ecs/components/shop.js

@@ -0,0 +1,3 @@
+import Component from '@/ecs/component.js';
+
+export default class Shop extends Component {}

app/ecs/components/wallet.js

@@ -0,0 +1,7 @@
+import Component from '@/ecs/component.js';
+
+export default class Wallet extends Component {
+  static properties = {
+    gold: {type: 'uint32'},
+  };
+}

app/react/components/dom/bag.jsx

@@ -1,6 +1,7 @@
 import {memo} from 'react';
 
 import styles from './bag.module.css';
+import gridStyles from './grid.module.css';
 
 import Grid from './grid.jsx';
 
@@ -8,8 +9,9 @@ import Grid from './grid.jsx';
  * Inventory bag. 10-40 slots of inventory.
  */
 function Bag({
+  highlighted,
   isInventoryOpen,
-  onActivate,
+  onSlotMouseDown,
   slots,
 }) {
   return (
@@ -17,11 +19,20 @@ function Bag({
       className={styles.bag}
       style={isInventoryOpen ? {transition: 'opacity 50ms'} : {opacity: 0, left: '-440px'}}
     >
+      <style>{`
+        .${styles.bag} .${gridStyles.highlighted} {
+          background-color: rgba(255, 0, 0, 0.4);
+        }
+        .${styles.bag} .${gridStyles.highlighted} button {
+          border: 2.5px dashed rgba(255, 255, 255, 0.4);
+        }
+      `}</style>
       <Grid
         color="rgba(02, 02, 28, 0.6)"
         columns={10}
+        highlighted={highlighted}
         label="Bag"
-        onActivate={onActivate}
+        onSlotMouseDown={onSlotMouseDown}
         slots={slots}
       />
     </div>

app/react/components/dom/external.jsx

@@ -1,6 +1,7 @@
 import {memo} from 'react';
 
 import styles from './external.module.css';
+import gridStyles from './grid.module.css';
 
 import Grid from './grid.jsx';
 
@@ -8,8 +9,9 @@ import Grid from './grid.jsx';
  * External inventory.
  */
 function External({
+  highlighted,
   isInventoryOpen,
-  onActivate,
+  onSlotMouseDown,
   slots,
 }) {
   return (
@@ -17,11 +19,20 @@ function External({
       className={styles.external}
       style={isInventoryOpen ? {transition: 'opacity 50ms'} : {opacity: 0, top: '450px'}}
     >
+      <style>{`
+        .${styles.external} .${gridStyles.highlighted} {
+          background-color: rgba(0, 255, 0, 0.4);
+        }
+        .${styles.external} .${gridStyles.highlighted} button {
+          border: 2.5px dashed rgba(0, 0, 0, 0.4);
+        }
+      `}</style>
       <Grid
         color="rgba(57, 02, 02, 0.6)"
         columns={10}
+        highlighted={highlighted}
         label="Chest"
-        onActivate={onActivate}
+        onSlotMouseDown={onSlotMouseDown}
         slots={slots}
       />
     </div>

app/react/components/dom/external.module.css

@@ -1,7 +1,3 @@
 .external {
-  left: 20px;
-  opacity: 1;
-  position: absolute;
-  top: 274px;
-  transition: top 150ms, opacity 200ms;
+  --nothing: 0;
 }

app/react/components/dom/grid.jsx

@@ -8,14 +8,19 @@ export default function Grid({
   active = -1,
   color,
   columns,
+  highlighted,
   label,
-  onActivate,
+  onSlotMouseDown,
   slots,
 }) {
   const Slots = slots.map((slot, i) => (
     <div
       className={
-        [styles.slot, active === i && styles.active]
+        [
+          styles.slot,
+          active === i && styles.active,
+          highlighted && highlighted.includes(i) && styles.highlighted,
+        ]
           .filter(Boolean).join(' ')
       }
       key={i}
@@ -23,25 +28,14 @@ export default function Grid({
       <Slot
         icon={slot?.icon}
         onMouseDown={(event) => {
-          onActivate(i)
+          onSlotMouseDown(i)
           event.stopPropagation();
         }}
         onMouseUp={(event) => {
           event.stopPropagation();
         }}
-        onDragOver={(event) => {
-          event.preventDefault();
-        }}
         onDragStart={(event) => {
-          if (!slot) {
           event.preventDefault();
-          }
-          event.dataTransfer.setData('silphius/item', i);
-          onActivate(i);
-        }}
-        onDrop={(event) => {
-          event.preventDefault();
-          onActivate(i);
         }}
         qty={slot?.qty}
       />

app/react/components/dom/grid.module.css

@@ -43,3 +43,7 @@
     z-index: 1;
   }
 }
+
+.highlighted {
+  --nothing: 0;
+}

app/react/components/dom/hotbar.jsx

@@ -10,8 +10,9 @@ import Grid from './grid.jsx';
  */
 function Hotbar({
   active,
+  highlighted,
   hotbarIsHidden,
-  onActivate,
+  onSlotMouseDown,
   slots,
 }) {
   return (
@@ -23,13 +24,20 @@ function Hotbar({
         .${styles.hotbar} .${gridStyles.label} {
           text-align: center;
         }
+        .${styles.hotbar} .${gridStyles.highlighted} {
+          background-color: rgba(255, 0, 0, 0.4);
+        }
+        .${styles.hotbar} .${gridStyles.highlighted} button {
+          border: 2.5px dashed rgba(255, 255, 255, 0.4);
+        }
       `}</style>
       <Grid
         active={active}
         color="rgba(02, 02, 57, 0.6)"
         columns={10}
+        highlighted={highlighted}
         label={slots[active] && slots[active].label}
-        onActivate={onActivate}
+        onSlotMouseDown={onSlotMouseDown}
         slots={slots}
       />
     </div>

app/react/components/dom/trade.jsx

@@ -0,0 +1,86 @@
+import styles from './trade.module.css';
+
+function reducePrice(r, item) {
+  return r + item.price * item.qty;
+}
+
+function Trade({
+  isInventoryOpen,
+  losing: losingUnfiltered,
+  onTradeAccepted,
+  gaining: gainingUnfiltered,
+  wallet,
+}) {
+  const losing = losingUnfiltered.filter(Boolean);
+  const gaining = gainingUnfiltered.filter(Boolean);
+  const nop = 0 === losing.length && 0 === gaining.length;
+  let earn = losing.reduce(reducePrice, 0) - gaining.reduce(reducePrice, 0);
+  const canAfford = -earn <= wallet;
+  return (
+    <div
+      className={styles.trade}
+      style={isInventoryOpen ? {transition: 'opacity 50ms'} : {opacity: 0, top: '450px'}}
+    >
+      <div className={styles.tradeInner}>
+        {
+          nop
+            ? (
+              <div className={styles.nop}>Let&apos;s trade!</div>
+            )
+            : (
+              <ul className={styles.summary}>
+                {losing.length > 0 && (
+                  <li className={styles.lose}>
+                    Shop receives:
+                    {' '}
+                    <ul className={styles.items}>
+                      {losing.map(({label, qty}, i) => (
+                        <li key={i}>{label} x<span className={styles.qty}>{qty}</span></li>
+                      ))}
+                    </ul>
+                  </li>
+                )}
+                {gaining.length > 0 && (
+                  <li className={styles.gain}>
+                    You receive:
+                    {' '}
+                    <ul className={styles.items}>
+                      {gaining.map(({label, qty}, i) => (
+                        <li key={i}>{label} x<span className={styles.qty}>{qty}</span></li>
+                      ))}
+                    </ul>
+                  </li>
+                )}
+                <li className={styles.subtotal}>
+                  {
+                    earn > 0
+                      ? (
+                        <span className={styles.cost}>You <span className={styles.make}>earn <span className={styles.amount}>{earn}</span></span><span className={styles.gold}>🄶</span></span>
+                      )
+                      : (
+                        earn < 0
+                          ? <span className={styles.cost}>You <span className={styles.pay}>pay <span className={styles.amount}>{-earn}</span></span><span className={styles.gold}>🄶</span></span>
+                          : false
+                      )
+                  }
+                  <button
+                    className={styles.agree}
+                    disabled={!canAfford}
+                    onClick={(event) => {
+                      event.stopPropagation();
+                      onTradeAccepted(event);
+                    }}
+                    title={canAfford ? "Finish the transaction" : `Transaction requires ${-earn}g but you only have ${wallet}g`}
+                  >
+                    {canAfford ? "Agree" : "Can't afford"}
+                  </button>
+                </li>
+              </ul>
+            )
+        }
+      </div>
+    </div>
+  );
+}
+
+export default Trade;

app/react/components/dom/trade.module.css

@@ -0,0 +1,129 @@
+.trade {
+  border: 2.5px solid #444444;
+  flex-grow: 1;
+  font-size: 0.8em;
+  margin: 16px 40px 0 8px;
+  text-shadow:
+    1px 0 0 black,
+    0 1px 0 black,
+    -1px 0 0 black,
+    0 -1px 0 black
+  ;
+}
+
+.tradeInner {
+  background-color: rgba(0, 0, 0, 0.7);
+  border: 2.5px solid #999999;
+  display: flex;
+  font-family: Cookbook, Georgia, 'Times New Roman', Times, serif;
+  height: 100%;
+  padding: 2.5px;
+  position: relative;
+  width: 100%;
+  ul {
+    list-style: none;
+    margin: 0;
+    padding-left: 0;
+  }
+}
+
+.agree {
+  background-color: rgba(255, 90, 0, 1);
+  border: 2.5px solid #cccccc;
+  box-shadow: inset 0 0 10px #666666;
+  color: white;
+  font-family: Cookbook, Georgia, 'Times New Roman', Times, serif;
+  font-size: 1em;
+  padding: 5px;
+  position: absolute;
+  bottom: 2.5px;
+  right: 2.5px;
+  text-shadow:
+    1px 0 0 black,
+    0 1px 0 black,
+    -1px 0 0 black,
+    0 -1px 0 black
+  ;
+  transition: box-shadow 200ms;
+  &:disabled {
+    background-color: #333333;
+    border-color: #777777;
+    color: #777777;
+  }
+  &:not(:disabled):hover {
+    box-shadow: inset 0 0 10px #222222;
+    cursor: pointer;
+    text-decoration: underline;
+  }
+}
+
+.summary {
+  display: flex;
+  flex-direction: column;
+  gap: 2.5px;
+  width: 100%;
+  > li {
+    padding: 2.5px;
+  }
+}
+
+.gain {
+  background-color: rgba(0, 255, 0, 0.5);
+  border: 2.5px solid rgba(0, 255, 0, 0.5);
+  max-height: 40.5px;
+  overflow-y: auto;
+}
+
+.lose {
+  background-color: rgba(255, 0, 0, 0.5);
+  border: 2.5px solid rgba(255, 0, 0, 0.5);
+  max-height: 40.5px;
+  overflow-y: auto;
+}
+
+.items {
+  display: inline;
+  li {
+    display: inline;
+    &:not(:last-child):after {
+      content: ', ';
+    }
+  }
+}
+
+.make {
+  color: rgb(0, 255, 0);
+}
+
+.pay {
+  color: red;
+}
+
+.gold {
+  color: gold;
+}
+
+.qty {
+  font-family: Joystix;
+  font-size: 0.75em;
+}
+
+.cost {
+  position: absolute;
+  bottom: 2.5px;
+  left: 5px;
+}
+
+.amount {
+  font-size: 1.5em;
+  position: relative;
+  top: 2px;
+}
+
+.nop {
+  align-self: center;
+  font-size: 2em;
+  padding: 1em;
+  text-align: center;
+  width: 100%;
+}

app/react/components/dom/wallet.jsx

@@ -0,0 +1,17 @@
+import styles from './wallet.module.css';
+
+function Wallet({gold}) {
+  const goldString = gold.toString();
+  const pad = ''.padStart(7 - goldString.length, '0');
+  return (
+    <span className={styles.wallet}>
+      <span className={styles.number}>
+        <span className={styles.pad}>{pad}</span>
+        <span className={styles.amount}>{goldString}</span>
+      </span>
+      <span className={styles.gold}>🄶</span>
+    </span>
+  )
+}
+
+export default Wallet;

app/react/components/dom/wallet.module.css

@@ -0,0 +1,19 @@
+.wallet {
+  position: absolute;
+  right: 10px;
+  text-shadow: 1px 0 0 black, 0 1px 0 black, -1px 0 0 black, 0 -1px 0 black;
+  top: 20px;
+}
+
+.gold {
+  color: gold;
+  font-family: Cookbook, Georgia, 'Times New Roman', Times, serif;
+}
+
+.number {
+  font-family: Joystix;
+}
+
+.pad {
+  color: #555555;
+}

app/react/components/ui.jsx

@@ -15,6 +15,8 @@ import DateTime from './dom/datetime.jsx';
 import Dom from './dom/dom.jsx';
 import Entities from './dom/entities.jsx';
 import External from './dom/external.jsx';
+import Trade from './dom/trade.jsx';
+import Wallet from './dom/wallet.jsx';
 import HotBar from './dom/hotbar.jsx';
 import Pixi from './pixi/pixi.jsx';
 import Devtools from './devtools.jsx';
@@ -62,7 +64,11 @@ function Ui({disconnected}) {
   const [isInventoryOpen, setIsInventoryOpen] = useState(false);
   const [externalInventory, setExternalInventory] = useState();
   const [externalInventorySlots, setExternalInventorySlots] = useState();
+  const [gaining, setGaining] = useState([]);
+  const [losing, setLosing] = useState([]);
+  const [wallet, setWallet] = useState(0);
   const [particleWorker, setParticleWorker] = useState();
+  const [trading, setTrading] = useState(false);
   useEffect(() => {
     let handle;
     if (disconnected) {
@@ -245,6 +251,9 @@ function Ui({disconnected}) {
       if (update.MainEntity) {
         mainEntityRef.current = id;
       }
+      if (update.Wallet && mainEntityRef.current === id) {
+        setWallet(update.Wallet.gold);
+      }
       if (update.Inventory) {
         if (mainEntityRef.current === id) {
           setBufferSlot(entity.Inventory.item(0));
@@ -267,6 +276,7 @@ function Ui({disconnected}) {
             newInventorySlots[i] = entity.Inventory.item(i);
           }
           setExternalInventory(entity.id)
+          setTrading(!!entity.Shop);
           setExternalInventorySlots(newInventorySlots);
           setIsInventoryOpen(true);
           setHotbarIsHidden(false);
@@ -277,6 +287,9 @@ function Ui({disconnected}) {
         else if (update.Inventory.closed) {
           setExternalInventory();
           setExternalInventorySlots();
+          setGaining([]);
+          setLosing([]);
+          setTrading(false);
         }
       }
       if (mainEntityRef.current === id) {
@@ -371,25 +384,67 @@ function Ui({disconnected}) {
     mainEntityRef,
     scale,
   ]);
-  const hotbarOnActivate = useCallback((i) => {
+  const hotbarOnSlotMouseDown = useCallback((i) => {
     keepHotbarOpen();
+    if (trading) {
+      const index = losing.indexOf(i + 1);
+      if (-1 === index) {
+        losing.push(i + 1);
+      }
+      else {
+        losing.splice(index, 1);
+      }
+      setLosing([...losing]);
+    }
+    else {
       client.send({
         type: 'Action',
         payload: {type: 'swapSlots', value: [0, mainEntityRef.current, i + 1]},
       });
-  }, [client, keepHotbarOpen, mainEntityRef]);
-  const bagOnActivate = useCallback((i) => {
+    }
+  }, [client, keepHotbarOpen, losing, mainEntityRef, trading]);
+  const bagOnSlotMouseDown = useCallback((i) => {
+    if (trading) {
+      const index = losing.indexOf(i + 11);
+      if (-1 === index) {
+        losing.push(i + 11);
+      }
+      else {
+        losing.splice(index, 1);
+      }
+      setLosing([...losing]);
+    }
+    else {
       client.send({
         type: 'Action',
         payload: {type: 'swapSlots', value: [0, mainEntityRef.current, i + 11]},
       });
-  }, [client, mainEntityRef]);
-  const externalInventoryOnActivate = useCallback((i) => {
+    }
+  }, [client, losing, mainEntityRef, trading]);
+  const externalInventoryOnSlotMouseDown = useCallback((i) => {
+    if (trading) {
+      const index = gaining.indexOf(i);
+      if (-1 === index) {
+        gaining.push(i);
+      }
+      else {
+        gaining.splice(index, 1);
+      }
+      setGaining([...gaining]);
+    }
+    else {
       client.send({
         type: 'Action',
         payload: {type: 'swapSlots', value: [0, externalInventory, i]},
       });
-  }, [client, externalInventory]);
+    }
+  }, [client, externalInventory, gaining, trading]);
+  const onTradeAccepted = useCallback(() => {
+    client.send({
+      type: 'Action',
+      payload: {type: 'acceptTrade', value: {gaining, losing}},
+    });
+  }, [client, gaining, losing]);
   useEffect(() => {
     if (!pixiRef.current) {
       return;
@@ -510,21 +565,37 @@ function Ui({disconnected}) {
         <Dom>
           <HotBar
             active={activeSlot}
+            highlighted={trading && losing.filter((i) => i < 11).map((i) => i - 1)}
             hotbarIsHidden={hotbarIsHidden}
-            onActivate={hotbarOnActivate}
+            onSlotMouseDown={hotbarOnSlotMouseDown}
             slots={hotbarSlots}
           />
           <Bag
+            highlighted={trading && losing.filter((i) => i >= 11).map((i) => i - 11)}
             isInventoryOpen={isInventoryOpen}
-            onActivate={bagOnActivate}
+            onSlotMouseDown={bagOnSlotMouseDown}
             slots={inventorySlots}
           />
           {externalInventory && (
+            <div className={styles.external}>
               <External
+                highlighted={trading && gaining}
                 isInventoryOpen={isInventoryOpen}
-              onActivate={externalInventoryOnActivate}
+                onSlotMouseDown={externalInventoryOnSlotMouseDown}
                 slots={externalInventorySlots}
               />
+              {trading && (
+                <Trade
+                  isInventoryOpen={isInventoryOpen}
+                  onTradeAccepted={onTradeAccepted}
+                  gaining={gaining.map((slot) => externalInventorySlots[slot])}
+                  losing={losing.map((slot) => {
+                    return slot < 11 ? hotbarSlots[slot - 1] : inventorySlots[slot - 11];
+                  })}
+                  wallet={wallet}
+                />
+              )}
+            </div>
           )}
           <Entities
             camera={camera}
@@ -550,6 +621,7 @@ function Ui({disconnected}) {
             <Disconnected />
           )}
           <DateTime />
+          <Wallet gold={wallet} />
         </Dom>
       </div>
       {devtoolsIsOpen && (

app/react/components/ui.module.css

@@ -22,3 +22,13 @@
   position: relative;
   user-select: none;
 }
+
+.external {
+  display: flex;
+  left: 20px;
+  opacity: 1;
+  position: absolute;
+  top: 274px;
+  transition: top 150ms, opacity 200ms;
+  width: 100%;
+}

app/server/create/homestead.js

@@ -152,6 +152,7 @@ export default async function createHomestead(id) {
       },
     },
     Position: {x: 200, y: 200},
+    Shop: {},
     Sprite: {
       anchorX: 0.5,
       anchorY: 0.7,

app/server/create/player.js

@@ -49,6 +49,9 @@ export default async function createPlayer(id) {
     },
     Ticking: {},
     VisibleAabb: {},
+    Wallet: {
+      gold: 1000,
+    },
     Wielder: {
       activeSlot: 1,
     },

app/server/engine.js

@@ -166,6 +166,8 @@ export default class Engine {
         Interacts,
         Interlocutor,
         Inventory,
+        Player,
+        Wallet,
         Wielder,
       } = entity;
       const ecs = this.ecses[Ecs.path];
@@ -231,6 +233,33 @@ export default class Engine {
             Controlled[payload.type] = payload.value;
             break;
           }
+          case 'acceptTrade': {
+            const {losing, gaining} = payload.value;
+            const gainingSlots = gaining.filter((slot) => Player.openInventory.item(slot));
+            const losingSlots = losing.filter((slot) => Inventory.item(slot));
+            const nop = 0 === gainingSlots.length && 0 === losingSlots.length;
+            const gainingItems = gainingSlots.map((slot) => Player.openInventory.item(slot));
+            const losingItems = losingSlots.map((slot) => Inventory.item(slot));
+            if (nop) {
+              break;
+            }
+            const reducePrice = (r, item) => {
+              return r + item.price * item.qty;
+            };
+            const earn = losingItems.reduce(reducePrice, 0) - gainingItems.reduce(reducePrice, 0);
+            const canAfford = -earn <= Wallet.gold;
+            if (!canAfford) {
+              break;
+            }
+            for (const slot of losingSlots) {
+              Inventory.clear(slot);
+            }
+            for (const item of gainingItems) {
+              Inventory.give({qty: item.qty, source: item.source});
+            }
+            Wallet.gold += earn;
+            break;
+          }
           case 'swapSlots': {
             if (!Controlled.locked) {
               const [l, other, r] = payload.value;

resources/brush/brush.json

@@ -1,5 +1,6 @@
 {
   "icon": "/resources/brush/brush.png",
   "label": "Brush",
+  "price": 100,
   "start": "/resources/brush/start.js"
 }

resources/furball/furball.json

@@ -1,4 +1,5 @@
 {
   "icon": "/resources/furball/furball.png",
-  "label": "Fur Ball"
+  "label": "Fur Ball",
+  "price": 5
 }

resources/hoe/hoe.json

@@ -1,6 +1,7 @@
 {
   "icon": "/resources/hoe/icon.png",
   "label": "Hoe",
+  "price": 100,
   "projectionCheck": "/resources/hoe/projection-check.js",
   "projection": {
     "distance": [3, -1],

resources/magic-swords/magic-swords.json

@@ -1,5 +1,6 @@
 {
   "icon": "/resources/magic-swords/icon.png",
   "label": "Magic swords",
+  "price": 2000,
   "start": "/resources/magic-swords/start.js"
 }

resources/potion/potion.json

@@ -1,5 +1,6 @@
 {
   "icon": "/resources/potion/icon.png",
   "label": "Potion",
+  "price": 50,
   "start": "/resources/potion/start.js"
 }

resources/tomato-seeds/tomato-seeds.json

@@ -1,6 +1,7 @@
 {
   "icon": "/resources/tomato-seeds/icon.png",
   "label": "Tomato Seeds",
+  "price": 20,
   "projection": {
     "distance": [1, -1],
     "grid": [

resources/tomato/tomato.json

@@ -1,3 +1,5 @@
 {
-  "icon": "/resources/tomato/tomato.png"
+  "icon": "/resources/tomato/tomato.png",
+  "label": "Tomato",
+  "price": 20
 }

resources/watering-can/watering-can.json

@@ -1,6 +1,7 @@
 {
   "icon": "/resources/watering-can/icon.png",
   "label": "Watering Can",
+  "price": 100,
   "projectionCheck": "/resources/watering-can/projection-check.js",
   "projection": {
     "distance": [3, -1],

stories/hotbar.stories.js

@@ -14,11 +14,11 @@ export default {
   decorators: [
     (Hotbar, ctx) => {
       const [, updateArgs] = useArgs();
-      const {onActivate} = ctx.args;
-      ctx.args.onActivate = (i) => {
+      const {onSlotMouseDown} = ctx.args;
+      ctx.args.onSlotMouseDown = (i) => {
         updateArgs({active: i});
-        if (onActivate) {
-          onActivate(i);
+        if (onSlotMouseDown) {
+          onSlotMouseDown(i);
         }
       };
       return Hotbar();
@@ -33,7 +33,7 @@ export default {
   tags: ['autodocs'],
   args: {
     active: 0,
-    onActivate: fn(),
+    onSlotMouseDown: fn(),
     slots,
   },
   argTypes: {