Add ctrl+click and shift+click behavior for creatures "arrows" - hero exchange

client/widgets/CExchangeController.cpp

@@ -110,6 +110,22 @@ void CExchangeController::moveStack(bool leftToRight, SlotID sourceSlot)
 	}
 }
 
+void CExchangeController::moveSingleStackCreature(bool leftToRight, SlotID sourceSlot, bool forceEmptySlotTarget)
+{
+	const auto source = leftToRight ? left : right;
+	const auto target = leftToRight ? right : left;
+	auto creature = source->getCreature(sourceSlot);
+
+	if(creature == nullptr || source->stacksCount() == 1)
+		return;
+
+	SlotID targetSlot = forceEmptySlotTarget ? target->getFreeSlot() : target->getSlotFor(creature);
+	if(targetSlot.validSlot())
+	{
+		LOCPLINT->cb->splitStack(source, target, sourceSlot, targetSlot, target->getStackCount(targetSlot) + 1);
+	}
+}
+
 void CExchangeController::swapArtifacts(bool equipped, bool baclpack)
 {
 	LOCPLINT->cb->bulkMoveArtifacts(left->id, right->id, true, equipped, baclpack);

client/widgets/CExchangeController.h

@@ -20,6 +20,7 @@ public:
 	void swapArmy();
 	void moveArmy(bool leftToRight, std::optional<SlotID> heldSlot);
 	void moveStack(bool leftToRight, SlotID sourceSlot);
+	void moveSingleStackCreature(bool leftToRight, SlotID sourceSlot, bool forceEmptySlotTarget);
 	void swapArtifacts(bool equipped, bool baclpack);
 	void moveArtifacts(bool leftToRight, bool equipped, bool baclpack);
 

client/windows/CExchangeWindow.cpp

@@ -268,6 +268,10 @@ void CExchangeWindow::creatureArrowButtonCallback(bool leftToRight, SlotID slotI
 {
 	if (GH.isKeyboardAltDown())
 		controller.moveArmy(leftToRight, slotId);
+	else if (GH.isKeyboardCtrlDown())
+		controller.moveSingleStackCreature(leftToRight, slotId, true);
+	else if (GH.isKeyboardShiftDown())
+		controller.moveSingleStackCreature(leftToRight, slotId, false);
 	else
 		controller.moveStack(leftToRight, slotId);
 }