v2.3.0: added long-press for quickslot functionality to inventory pane

core/src/main/java/com/shatteredpixel/shatteredpixeldungeon/ui/InventoryPane.java

@@ -40,6 +40,7 @@ import com.shatteredpixel.shatteredpixeldungeon.scenes.PixelScene;
 import com.shatteredpixel.shatteredpixeldungeon.sprites.CharSprite;
 import com.shatteredpixel.shatteredpixeldungeon.sprites.ItemSpriteSheet;
 import com.shatteredpixel.shatteredpixeldungeon.windows.WndBag;
+import com.shatteredpixel.shatteredpixeldungeon.windows.WndInfoItem;
 import com.shatteredpixel.shatteredpixeldungeon.windows.WndUseItem;
 import com.watabou.gltextures.TextureCache;
 import com.watabou.input.GameAction;
@@ -531,6 +532,20 @@ public class InventoryPane extends Component {
 			}
 		}
 
+		@Override
+		protected boolean onLongClick() {
+			if (selector == null && item.defaultAction() != null) {
+				QuickSlotButton.set( item );
+				return true;
+			} else if (selector != null) {
+				GameScene.centerNextWndOnInvPane();
+				GameScene.show(new WndInfoItem(item));
+				return true;
+			} else {
+				return false;
+			}
+		}
+
 		@Override
 		protected void onMiddleClick() {
 			if (lastBag != item && !lastBag.contains(item) && !item.isEquipped(Dungeon.hero)){