X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fdesigner%2Fmanipulator.cpp;h=720309bd8dc4b773374b7120fd09195685464d91;hb=7e27b311e33beda1746eb63e0945633f262427f6;hp=23ea138623c42809726c0df07c644ad15ba52f99;hpb=1ff06c5bc46a677fa389ef86c6b26664368f1653;p=r2c2.git

diff --git a/source/designer/manipulator.cpp b/source/designer/manipulator.cpp
index 23ea138..720309b 100644
--- a/source/designer/manipulator.cpp
+++ b/source/designer/manipulator.cpp
@@ -59,12 +59,26 @@ void Manipulator::start_elevate()
 	mode = ELEVATE;
 }
 
-void Manipulator::start_extend()
+bool Manipulator::start_extend()
 {
 	if(mode)
 		cancel();
 
-	mode = EXTEND;
+	bool ok = false;
+	const set<Track *> &stracks = selection.get_tracks();
+	for(set<Track *>::const_iterator i=stracks.begin(); (!ok && i!=stracks.end()); ++i)
+	{
+		const vector<Track *> &links = (*i)->get_links();
+		for(vector<Track *>::const_iterator j=links.begin(); (!ok && j!=links.end()); ++j)
+			ok = !*j;
+	}
+
+	if(ok)
+		mode = EXTEND;
+	else
+		signal_status.emit("No free endpoints");
+
+	return ok;
 }
 
 void Manipulator::duplicate()