corrected trading inconsistencies, improved trade window, initial slider widget

2 files changed, 18 insertions, 1 deletions

diff --git a/src/core/inventory.cc b/src/core/inventory.cc
index 03cd21e..4b9a2e5 100644
--- a/src/core/inventory.cc
+++ b/src/core/inventory.cc
@@ -97,5 +97,14 @@ void Inventory::recalculate()
 	}
 }
 
+const long Inventory::max_amount(const long credits, const long price, const float volume) const
+{
+	if ((price * volume) == 0) {
+		return 0;
+	}
+	
+	return math::min((long)(capacity_available() / volume), credits / price);
+}
+
 } // namespace core
 
diff --git a/src/core/inventory.h b/src/core/inventory.h
index 805d943..7aaf299 100644
--- a/src/core/inventory.h
+++ b/src/core/inventory.h
@@ -66,13 +66,21 @@ public:
 	}
 
 	/**
-	 * @brief return the availableinventory capacity, in cubic meters
+	 * @brief return the available inventory capacity, in cubic meters
 	 */
 	inline const float capacity_available() const {
 		return inventory_capacity - inventory_capacity_used;
 	}
 	
 	/**
+	 * @brief returns the number of units of an item that can be stored in this inventory
+	 * @param credits number of player credits, limits the amount
+	 * @param price price of a single unit
+	 * @param volume volume of a single unit
+	 */
+	const long max_amount(const long credits, const long price, const float volume) const;
+	
+	/**
 	  * @brief search the inventory for a specific item type
 	  */
 	 Item *find(const Info *info) const;