From 98c3bd9c080667ee1bf46e69e625678983a52c47 Mon Sep 17 00:00:00 2001
From: dooglus <dooglus@1f10aa63-cdf2-0310-b900-c93c546f37ac>
Date: Wed, 19 Nov 2008 13:44:24 +0000
Subject: [PATCH] Add a new signal_subcanvas_changed() that is signalled
 whenever a PasteCanvas' subcanvas is changed.  Not used yet.

git-svn-id: https://synfig.svn.sourceforge.net/svnroot/synfig@2221 1f10aa63-cdf2-0310-b900-c93c546f37ac
---
 synfig-core/trunk/src/synfig/layer_pastecanvas.cpp |  2 ++
 synfig-core/trunk/src/synfig/layer_pastecanvas.h   | 17 +++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/synfig-core/trunk/src/synfig/layer_pastecanvas.cpp b/synfig-core/trunk/src/synfig/layer_pastecanvas.cpp
index bcf954f..f8006e4 100644
--- a/synfig-core/trunk/src/synfig/layer_pastecanvas.cpp
+++ b/synfig-core/trunk/src/synfig/layer_pastecanvas.cpp
@@ -212,6 +212,8 @@ Layer_PasteCanvas::set_sub_canvas(etl::handle<synfig::Canvas> x)
 
 	child_changed_connection.disconnect();
 
+	if (canvas != x) signal_subcanvas_changed()();
+
 	canvas=x;
 
 	/*if(canvas)
diff --git a/synfig-core/trunk/src/synfig/layer_pastecanvas.h b/synfig-core/trunk/src/synfig/layer_pastecanvas.h
index 3a3811e..ab1bd1f 100644
--- a/synfig-core/trunk/src/synfig/layer_pastecanvas.h
+++ b/synfig-core/trunk/src/synfig/layer_pastecanvas.h
@@ -97,6 +97,23 @@ private:
 	// did, but we've forgotten whether we did.  So we use this
 	// 'extra_reference' member to store that decision.
 	bool extra_reference;
+
+	/*
+ -- ** -- S I G N A L S -------------------------------------------------------
+	*/
+
+private:
+
+	sigc::signal<void> signal_subcanvas_changed_;
+
+	/*
+ -- ** -- S I G N A L   I N T E R F A C E -------------------------------------
+	*/
+
+public:
+
+	sigc::signal<void>& signal_subcanvas_changed() { return signal_subcanvas_changed_; }
+
 public:
 
 	void update_renddesc();
-- 
2.7.4