5 files changed, 58 insertions, 10 deletions
diff --git a/src/Bindings/ManualBindings_World.cpp b/src/Bindings/ManualBindings_World.cpp
index ddbebce78..d9590de33 100644
--- a/src/Bindings/ManualBindings_World.cpp
+++ b/src/Bindings/ManualBindings_World.cpp
@@ -490,7 +490,7 @@ static int tolua_cWorld_ScheduleTask(lua_State * tolua_S)
 
 	auto task = std::make_shared<cLuaScheduledWorldTask>(*Plugin, FnRef);
 	Plugin->AddResettable(task);
-	World->ScheduleTask(DelayTicks, task);
+	World->ScheduleTask(DelayTicks, static_cast<cWorld::cTaskPtr>(task));
 	return 0;
 }
 
diff --git a/src/Blocks/BlockButton.h b/src/Blocks/BlockButton.h
index 154cd610e..3558729bb 100644
--- a/src/Blocks/BlockButton.h
+++ b/src/Blocks/BlockButton.h
@@ -19,15 +19,35 @@ public:
 	
 	virtual void OnUse(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ) override
 	{
+		NIBBLETYPE Meta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
+		
+		double x(a_BlockX);
+		double y(a_BlockY);
+		double z(a_BlockZ);
+
+		// If button is already on do nothing
+		if (Meta & 0x08)
+		{
+			return;
+		}
+
 		// Set p the ON bit to on
-		NIBBLETYPE Meta = (a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ) | 0x08);
+		Meta |= 0x08;
 
 		a_ChunkInterface.SetBlockMeta(a_BlockX, a_BlockY, a_BlockZ, Meta);
 		a_WorldInterface.WakeUpSimulators(a_BlockX, a_BlockY, a_BlockZ);
-		a_WorldInterface.GetBroadcastManager().BroadcastSoundEffect("random.click", (double)a_BlockX, (double)a_BlockY, (double)a_BlockZ, 0.5f, (Meta & 0x08) ? 0.6f : 0.5f);
+		a_WorldInterface.GetBroadcastManager().BroadcastSoundEffect("random.click", x, y, z, 0.5f, 0.6f);
 
 		// Queue a button reset (unpress)
-		a_ChunkInterface.QueueSetBlock(a_BlockX, a_BlockY, a_BlockZ, m_BlockType, (a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ) & 0x07), m_BlockType == E_BLOCK_STONE_BUTTON ? 20 : 30, m_BlockType, a_WorldInterface);
+		int delay = (m_BlockType == E_BLOCK_STONE_BUTTON) ? 20 : 30;
+
+		a_ChunkInterface.QueueSetBlock(a_BlockX, a_BlockY, a_BlockZ, m_BlockType, (a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ) & 0x07), delay, m_BlockType, a_WorldInterface);
+
+		a_Player->GetWorld()->ScheduleTask(delay, [x, y, z](cWorld & a_World)
+		{
+			a_World.BroadcastSoundEffect("random.click", x, y, z, 0.5f, 0.5f);
+		});
+	
 	}
 
 	
diff --git a/src/Blocks/BlockPiston.cpp b/src/Blocks/BlockPiston.cpp
index d9f4913d8..75f8621a7 100644
--- a/src/Blocks/BlockPiston.cpp
+++ b/src/Blocks/BlockPiston.cpp
@@ -179,7 +179,7 @@ void cBlockPistonHandler::ExtendPiston(int a_BlockX, int a_BlockY, int a_BlockZ,
 
 	a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, pistonBlock, pistonMeta | 0x8);
 	a_World->SetBlock(extx, exty, extz, E_BLOCK_PISTON_EXTENSION, pistonMeta | (IsSticky(pistonBlock) ? 8 : 0), false);
-	a_World->ScheduleTask(PISTON_TICK_DELAY, std::make_shared<cWorld::cTaskSendBlockToAllPlayers>(ScheduledBlocks));
+	a_World->ScheduleTask(PISTON_TICK_DELAY, static_cast<cWorld::cTaskPtr>(std::make_shared<cWorld::cTaskSendBlockToAllPlayers>(ScheduledBlocks)));
 }
 
 
@@ -229,7 +229,7 @@ void cBlockPistonHandler::RetractPiston(int a_BlockX, int a_BlockY, int a_BlockZ
 			std::vector<Vector3i> ScheduledBlocks;
 			ScheduledBlocks.push_back(Vector3i(a_BlockX, a_BlockY, a_BlockZ));
 			ScheduledBlocks.push_back(Vector3i(tempx, tempy, tempz));
-			a_World->ScheduleTask(PISTON_TICK_DELAY + 1, std::make_shared<cWorld::cTaskSendBlockToAllPlayers>(ScheduledBlocks));
+			a_World->ScheduleTask(PISTON_TICK_DELAY + 1, static_cast<cWorld::cTaskPtr>(std::make_shared<cWorld::cTaskSendBlockToAllPlayers>(ScheduledBlocks)));
 			return;
 		}
 	}
@@ -239,7 +239,7 @@ void cBlockPistonHandler::RetractPiston(int a_BlockX, int a_BlockY, int a_BlockZ
 
 	std::vector<Vector3i> ScheduledBlocks;
 	ScheduledBlocks.push_back(Vector3i(a_BlockX, a_BlockY, a_BlockZ));
-	a_World->ScheduleTask(PISTON_TICK_DELAY + 1, std::make_shared<cWorld::cTaskSendBlockToAllPlayers>(ScheduledBlocks));
+	a_World->ScheduleTask(PISTON_TICK_DELAY + 1, static_cast<cWorld::cTaskPtr>(std::make_shared<cWorld::cTaskSendBlockToAllPlayers>(ScheduledBlocks)));
 }
 
 
diff --git a/src/World.cpp b/src/World.cpp
index cf2c35816..f4fd696ee 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -3051,7 +3051,11 @@ void cWorld::QueueTask(cTaskPtr a_Task)
 }
 
 
-
+void cWorld::ScheduleTask(int a_DelayTicks, std::function<void (cWorld&)> a_Func)
+{
+	cTaskLambda task(a_Func);
+	ScheduleTask(a_DelayTicks, static_cast<cTaskPtr>(std::make_shared<cTaskLambda>(task)));
+}
 
 
 void cWorld::ScheduleTask(int a_DelayTicks, cTaskPtr a_Task)
@@ -3554,8 +3558,10 @@ void cWorld::cTaskSendBlockToAllPlayers::Run(cWorld & a_World)
 	a_World.ForEachPlayer(PlayerCallback);
 }
 
-
-
+void cWorld::cTaskLambda::Run(cWorld & a_World)
+{
+	m_func(a_World);
+}
 
 
 ////////////////////////////////////////////////////////////////////////////////
diff --git a/src/World.h b/src/World.h
index 064b50165..2ea89f338 100644
--- a/src/World.h
+++ b/src/World.h
@@ -103,8 +103,12 @@ public:
 	class cTask
 	{
 	public:
+		cTask(const cTask & other) = default;
 		virtual ~cTask() {}
 		virtual void Run(cWorld & a_World) = 0;
+
+	protected:
+		cTask() {}
 	} ;
 	
 	typedef SharedPtr<cTask> cTaskPtr;
@@ -142,6 +146,21 @@ public:
 		std::vector<Vector3i> m_SendQueue;
 	};
 
+	class cTaskLambda :
+		public cTask
+	{
+
+	public:
+		cTaskLambda(std::function<void(cWorld&)> a_Func) :
+			m_func(a_Func)
+		{ }
+
+	protected:
+		virtual void Run(cWorld & a_World) override;
+
+		std::function<void(cWorld&)> m_func;
+	};
+
 
 	static const char * GetClassStatic(void)  // Needed for ManualBindings's ForEach templates
 	{
@@ -705,6 +724,9 @@ public:
 	/** Queues a task onto the tick thread. The task object will be deleted once the task is finished */
 	void QueueTask(cTaskPtr a_Task);  // Exported in ManualBindings.cpp
 	
+	/** Queues a lambda task onto the tick thread, with the specified delay. */
+	void ScheduleTask(int a_DelayTicks, std::function<void(cWorld&)> a_Func);
+
 	/** Queues a task onto the tick thread, with the specified delay. */
 	void ScheduleTask(int a_DelayTicks, cTaskPtr a_Task);