Add support for named zones

[r2c2.git] / source / designer / manipulator.cpp

diff --git a/source/designer/manipulator.cpp b/source/designer/manipulator.cpp
index 23ea138623c42809726c0df07c644ad15ba52f99..720309bd8dc4b773374b7120fd09195685464d91 100644 (file)
--- 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()