package bluej.graph;

import javafx.scene.input.KeyCode;

import bluej.pkgmgr.Package;
import bluej.pkgmgr.target.Target;
import threadchecker.OnThread;
import threadchecker.Tag;




| A strategy to move graph selections with keyboard input.
|
| @author fisker
|
@OnThread(Tag.FXPlatform)
public interface TraverseStrategy
{       



| Given a currently selected vertex and a key press, decide which vertex
| should be selected next.
|
| @param graph  The graph we're looking at.
| @param currentVertex  The currently selected vertex.
| @param key  The key that was pressed.
| @return     A vertex that should be selected now.
|
public Target findNextVertex(Package graph, Target currentVertex, KeyCode key); 
   }