X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Fdesigner%2Fmanipulator.cpp;h=b41b29eeac9ac6e6562df825824f316a817fa3f7;hb=cb222b6df855da4196a331c5b9859750c4321fa0;hp=23ea138623c42809726c0df07c644ad15ba52f99;hpb=1ff06c5bc46a677fa389ef86c6b26664368f1653;p=r2c2.git

diff --git a/source/designer/manipulator.cpp b/source/designer/manipulator.cpp
index 23ea138..b41b29e 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()
@@ -358,8 +372,8 @@ void Manipulator::button_press(int, int, unsigned btn, unsigned)
 
 void Manipulator::pointer_motion(int x, int y)
 {
-	pointer_y = y;
-	gpointer = designer.map_pointer_to_ground(x, event_source.get_height()-1-y);
+	pointer_y = event_source.get_height()-1-y;
+	gpointer = designer.map_pointer_to_ground(x, pointer_y);
 
 	if(mode==MOVE)
 	{
@@ -420,7 +434,7 @@ void Manipulator::pointer_motion(int x, int y)
 	}
 	else if(mode==ELEVATE)
 	{
-		float dz = (y-elev_origin)/1000.;
+		float dz = (pointer_y-elev_origin)/1000.;
 
 		signal_status.emit(format("Elevation: %+.0fmm (%.0fmm)", dz*1000, (center.z+dz)*1000));