sync edit menu checkbox state with the selected shape

src/main/java/ovh/gasser/newshapes/ui/Controller.java

@@ -7,6 +7,7 @@ import ovh.gasser.newshapes.Selection;
 import ovh.gasser.newshapes.attributes.ColorAttributes;
 import ovh.gasser.newshapes.shapes.SCollection;
 import ovh.gasser.newshapes.shapes.Shape;
+import ovh.gasser.newshapes.ui.listeners.SelectionListener;
 
 import java.awt.*;
 import java.awt.event.KeyAdapter;
@@ -21,6 +22,7 @@ public class Controller {
     private final ShapesView view;
     private final SCollection model;
     private final Selection selection;
+
     private Point lastMousePos;
 
     Controller(ShapesView view, SCollection model) {
@@ -139,10 +141,13 @@ public class Controller {
         selection.clear();
     }
 
+    public void addSelectionChangeListener(SelectionListener listener) {
+        selection.addListener(listener);
+    }
+
     private Optional<Shape> getTarget(MouseEvent evt, SCollection sc) {
         return sc.stream()
                 .filter(s -> s.getBounds().contains(evt.getPoint()))
                 .findFirst();
     }
-
 }