// From Lay Networks.com

import java.awt.*;

class Options extends Panel
{

    Options(BellmanFord bellmanford)
    {
        b1 = new Button("clear");
        b2 = new Button("run");
        b3 = new Button("step");
        b4 = new Button("reset");
        Locked = false;
        parent = bellmanford;
        setLayout(new GridLayout(6, 1, 0, 10));
        add(b1);
        add(b2);
        add(b3);
        add(b4);
    }

    public boolean action(Event event, Object obj)
    {
        if(event.target instanceof Button)
        {
            if(((String)obj).equals("step"))
                if(!Locked)
                {
                    b3.setLabel("next");
                    parent.graphcanvas.stepalg();
                } else
                {
                    parent.documentation.doctext.showline("locked");
                }
            if(((String)obj).equals("next"))
                parent.graphcanvas.nextstep();
            if(((String)obj).equals("reset"))
            {
                parent.graphcanvas.reset();
                b3.setLabel("step");
                parent.documentation.doctext.showline("all items");
            }
            if(((String)obj).equals("clear"))
            {
                parent.graphcanvas.clear();
                b3.setLabel("step");
                parent.documentation.doctext.showline("all items");
            }
            if(((String)obj).equals("run"))
                if(!Locked)
                    parent.graphcanvas.runalg();
                else
                    parent.documentation.doctext.showline("locked");
        }
        return true;
    }

    public void lock()
    {
        Locked = true;
    }

    public void unlock()
    {
        Locked = false;
        b3.setLabel("step");
    }

    Button b1;
    Button b2;
    Button b3;
    Button b4;
    BellmanFord parent;
    boolean Locked;
}