From 6eba064c477836843a2647d777e95823a96dda43 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Tue, 15 Apr 2014 18:41:36 +0300
Subject: [PATCH] Add a signal for advancing the rear end of the train

---
 source/libr2c2/blockallocator.cpp | 1 +
 source/libr2c2/blockallocator.h   | 1 +
 source/libr2c2/train.cpp          | 1 +
 source/libr2c2/train.h            | 1 +
 4 files changed, 4 insertions(+)

diff --git a/source/libr2c2/blockallocator.cpp b/source/libr2c2/blockallocator.cpp
index 8e87269..5870a6d 100644
--- a/source/libr2c2/blockallocator.cpp
+++ b/source/libr2c2/blockallocator.cpp
@@ -397,6 +397,7 @@ void BlockAllocator::advance_back()
 				if(i!=end)
 					++end;
 				release_blocks_begin(end);
+				signal_rear_advanced.emit(*last());
 			}
 			return;
 		}
diff --git a/source/libr2c2/blockallocator.h b/source/libr2c2/blockallocator.h
index 33e9d55..cd6dfd5 100644
--- a/source/libr2c2/blockallocator.h
+++ b/source/libr2c2/blockallocator.h
@@ -28,6 +28,7 @@ public:
 	};
 
 	sigc::signal<void, Block &, Sensor *> signal_advanced;
+	sigc::signal<void, Block &> signal_rear_advanced;
 
 private:
 	struct BlockMatch;
diff --git a/source/libr2c2/train.cpp b/source/libr2c2/train.cpp
index 98553e3..b670d41 100644
--- a/source/libr2c2/train.cpp
+++ b/source/libr2c2/train.cpp
@@ -68,6 +68,7 @@ Train::Train(Layout &l, const VehicleType &t, unsigned a, const string &p):
 	controller->signal_control_changed.connect(sigc::mem_fun(this, &Train::control_changed));
 
 	allocator.signal_advanced.connect(sigc::mem_fun(this, &Train::advanced));
+	allocator.signal_rear_advanced.connect(signal_rear_advanced);
 }
 
 Train::~Train()
diff --git a/source/libr2c2/train.h b/source/libr2c2/train.h
index 3c4176d..6d9a20f 100644
--- a/source/libr2c2/train.h
+++ b/source/libr2c2/train.h
@@ -44,6 +44,7 @@ public:
 	sigc::signal<void, unsigned, bool> signal_function_changed;
 	sigc::signal<void, TrainAI &, const TrainAI::Message &> signal_ai_event;
 	sigc::signal<void, Block &> signal_advanced;
+	sigc::signal<void, Block &> signal_rear_advanced;
 	sigc::signal<void, unsigned, Vehicle &> signal_vehicle_added;
 	sigc::signal<void, unsigned, Vehicle &> signal_vehicle_removed;
 
-- 
2.43.0