Examples of diva.canvas.ZList

diva.canvas.ZList

A ZList is an interface for objects that contain an ordered list of figures in z-order. In addition to the methods inherited from FigureChildren, ZList has methods for reordering figures in the list, and in the future may have methods for locating objects in 2D space. This interface is used to isolate the implementation of figure containers from the z-list, to allow future optimization of the z-list implementation. This interface tries to mimic the AWT Container and Swing JLayerPane interfaces where possible. Unfortunately, these two classes differ on the relation between list ordering and display ordering, so we have chosen to use the AWT Container order (high-numbered elements are displayed below lower-numbered elements), since we thought it would make using the add method less error-prone. @version $Id: ZList.java,v 1.11 2005/07/08 19:54:47 cxh Exp $ @author John Reekie @Pt.AcceptedRating Yellow

     * Return an iterator over the nodes which intersect the given
     * rectangle in the top-level graph.
     */
    public Iterator intersectingNodes(Rectangle2D r) {
        final GraphModel model = _controller.getGraphModel();
        ZList zlist = getGraphicsPane().getForegroundLayer().getFigures();
        Iterator i = zlist.getIntersectedFigures(r).figuresFromFront();
        Iterator j = new FilteredIterator(i, new Filter() {
            public boolean accept(Object o) {
                Figure f = (Figure) o;
                return (model.isNode(f.getUserObject()));
            }

    /**
     * Return an iterator over the node or edge figures which
     * intersect the given rectangle.
     */
    public Iterator intersectingEdges(Rectangle2D r) {
        ZList zlist = getGraphicsPane().getForegroundLayer().getFigures();
        Iterator i = zlist.getIntersectedFigures(r).figuresFromFront();
        Iterator j = new FilteredIterator(i, new Filter() {
            public boolean accept(Object o) {
                return (o instanceof Connector);
            }
        });

Examples of diva.canvas.ZList

Related Classes of diva.canvas.ZList