handle multiple selection with shift

src/main/java/ovh/gasser/newshapes/shapes/AbstractShape.java

@@ -29,11 +29,6 @@ public abstract class AbstractShape implements Shape {
         attributes.put(attrs.getID(), attrs);
     }
 
-    @Override
-    public void setLoc(Point newLoc) {
-        getBounds().setLocation(newLoc);
-    }
-
     @Override
     public void translate(int dx, int dy) {
         getBounds().translate(dx, dy);

src/main/java/ovh/gasser/newshapes/shapes/SCollection.java

@@ -12,7 +12,6 @@ import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Spliterator;
-import java.util.stream.Collectors;
 
 public class SCollection extends AbstractShape implements Streamable<Shape> {
     private final static Logger logger = LoggerFactory.getLogger(SCollection.class);
@@ -53,9 +52,8 @@ public class SCollection extends AbstractShape implements Streamable<Shape> {
     }
 
     @Override
-    public void setLoc(Point newLoc) {
-        final Point loc = getBounds().getLocation();
-        children.forEach(s -> s.translate(newLoc.x - loc.x, newLoc.y - loc.y));
+    public void translate(int dx, int dy) {
+        children.forEach(s -> s.translate(dx, dy));
     }
 
     @Override

src/main/java/ovh/gasser/newshapes/shapes/Shape.java

@@ -7,7 +7,6 @@ import java.awt.*;
 
 public interface Shape {
     void accept(ShapeVisitor visitor);
-    void setLoc(Point newLoc);
     void translate(int dx, int dy);
     Attributes getAttributes(String key);
     void addAttributes(Attributes attr);