NotEnoughItems/src/main/java/codechicken/nei/WidgetZOrder.java

package codechicken.nei;

import java.util.Comparator;

public class WidgetZOrder implements Comparator<Widget> {

    final boolean topfirst;

    public WidgetZOrder(boolean topfirst) {
        this.topfirst = topfirst;
    }

    public int compare(Widget w1, Widget w2) {
        return w1.z != w2.z ? ((topfirst ? w1.z < w2.z : w1.z > w2.z) ? 1 : -1) : 1;
    }
}