Examples of diva.util.java2d.Polyline2D

diva.util.java2d.Polyline2D
A polyline shape. This class implements java.awt.Shape, and consists of a series of straight-line segments. This class should be used instead of GeneralPath for shapes that consist only of straight-line segments (and that are no closed). It is more efficient than GeneralPath, and allows the coordinates of vertices to be modified. Following the convention set by the Java2D shape classes, the Polyline class is an abstract class, which contains two concrete inner classes, one storing floats and one storing doubles. @version $Id: Polyline2D.java,v 1.15 2007/12/16 07:30:18 cxh Exp $ @author John Reekie

        path.quadTo(180, 120, 120, 240);
        path.closePath();
        _shape = new BasicFigure(path, Color.red);
        layer.add(_shape);


        Polyline2D poly = new Polyline2D.Double();
        poly.moveTo(240, 120);
        poly.lineTo(280, 140);
        poly.lineTo(240, 160);
        poly.lineTo(280, 180);
        poly.lineTo(240, 200);
        poly.lineTo(280, 220);
        poly.lineTo(240, 240);
        _line = new BasicFigure(poly);
        layer.add(_line);
    }

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            if (coords.length == 4) {
                s = new Line2D.Double(coords[0], coords[1], coords[2],
                        coords[3]);
            } else {
                Polyline2D poly = new Polyline2D.Double();
                poly.moveTo(coords[0], coords[1]);


                for (int i = 2; i < coords.length; i += 2) {
                    poly.lineTo(coords[i], coords[i + 1]);
                }


                s = poly;
            }

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            if (coords.length == 4) {
                s = new Line2D.Double(coords[0], coords[1], coords[2],
                        coords[3]);
            } else {
                Polyline2D poly = new Polyline2D.Double();
                poly.moveTo(coords[0], coords[1]);


                for (int i = 2; i < coords.length; i += 2) {
                    poly.lineTo(coords[i], coords[i + 1]);
                }


                s = poly;
            }

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     * current positions of the head and tail sites.
     */
    public void route() {
        repaint();


        Polyline2D poly = (Polyline2D) _router.route(this);
        int count = poly.getVertexCount();


        if (count > 1) {
            // pick a location for the label in the middle of the connector.
            _labelLocation = new Point2D.Double((poly.getX(count / 2) + poly
                    .getX((count / 2) - 1)) / 2, (poly.getY(count / 2) + poly
                    .getY((count / 2) - 1)) / 2);
        } else {
            // attach the label to the only point of the connector.
            _labelLocation = new Point2D.Double(poly.getX(0), poly.getY(0));
        }


        if (_bendRadius == 0) {
            setShape(poly);
        } else {
            GeneralPath path = new GeneralPath();
            path.moveTo((float) poly.getX(0), (float) poly.getY(0));


            double prevX = poly.getX(0);
            double prevY = poly.getY(0);


            for (int i = 2; i < poly.getVertexCount(); i++) {
                //consider triplets of coordinates
                double x0 = prevX; //poly.getX(i-2);
                double y0 = prevY; //poly.getY(i-2);
                double x1 = poly.getX(i - 1);
                double y1 = poly.getY(i - 1);
                double x2 = poly.getX(i);
                double y2 = poly.getY(i);


                //midpoints
                x2 = (x1 + x2) / 2;
                y2 = (y1 + y2) / 2;


                //first make sure that the radius is not
                //bigger than half one of the arms of the triplets
                double d0 = Math.sqrt(((x1 - x0) * (x1 - x0))
                        + ((y1 - y0) * (y1 - y0)));
                double d1 = Math.sqrt(((x2 - x1) * (x2 - x1))
                        + ((y2 - y1) * (y2 - y1)));
                double r = Math.min(_bendRadius, d0);
                r = Math.min(r, d1);


                // The degenerate case of a direct line.
                if ((d0 == 0.0) || (d1 == 0.0)) {
                    path.lineTo((float) x1, (float) y1);
                } else {
                    //next calculate the intermediate points
                    //that define the bend.
                    double intX0 = x1 + ((r / d0) * (x0 - x1));
                    double intY0 = y1 + ((r / d0) * (y0 - y1));
                    double intX1 = x1 + ((r / d1) * (x2 - x1));
                    double intY1 = y1 + ((r / d1) * (y2 - y1));


                    //next draw the line from the previous
                    //coord to the intermediate coord, and
                    //curve around the corner
                    path.lineTo((float) intX0, (float) intY0);
                    path.curveTo((float) x1, (float) y1, (float) x1,
                            (float) y1, (float) intX1, (float) intY1);
                    prevX = x2;
                    prevY = y2;
                }
            }


            //finally close the last segment with a line.
            path.lineTo((float) poly.getX(poly.getVertexCount() - 1),
                    (float) poly.getY(poly.getVertexCount() - 1));


            //now set the shape
            setShape(path);
        }

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     * sites at both ends are moved the same distance.
     */
    public void translate(double x, double y) {
        repaint();


        Polyline2D line = (Polyline2D) getShape();
        line.translate(x, y);
        repaint();
    }

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            c.getTailEnd().setNormal(tailAngle);
            c.getTailEnd().setOrigin(tailPt.getX(), tailPt.getY());
            c.getTailEnd().getConnection(tailPt);
        }


        Polyline2D route = _route(headPt, headDir, tailPt, tailDir);
        return route;


        // FIXME Adjust for decorations on the ends


        /*

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        Point2D point;
        int dir;


        // System.out.println("routing, diff=(" + xDiff + ", " + yDiff + ")");
        if (((xDiff * xDiff) < (TOL * TOL)) && ((yDiff * yDiff) < (TOL * TOL))) {
            Polyline2D route = new Polyline2D.Double();
            route.moveTo(tail.getX(), tail.getY());
            return route;
        }


        //System.out.println("headDir = " + headDir);
        if (headDir == SwingConstants.WEST) {
            //System.out.println("head is east");
            if ((xDiff > 0) && ((yDiff * yDiff) < TOL)
                    && (tailDir == SwingConstants.EAST)) {
                //System.out.println("completing straight");
                point = tail;
                dir = tailDir;
            } else {
                if (xDiff < 0) {
                    //System.out.println("routing backwards");
                    point = new Point2D.Double(head.getX() - MINDIST, head
                            .getY());
                } else if (((yDiff > 0) && (tailDir == SwingConstants.SOUTH))
                        || ((yDiff < 0) && (tailDir == SwingConstants.NORTH))) {
                    //System.out.println("completing 90");
                    point = new Point2D.Double(tail.getX(), head.getY());
                } else if (headDir == tailDir) {
                    double pos = Math.min(head.getX(), tail.getX()) - MINDIST;
                    point = new Point2D.Double(pos, head.getY());
                } else {
                    point = new Point2D.Double(head.getX() - (xDiff / 2), head
                            .getY());
                }


                if (yDiff > 0) {
                    dir = SwingConstants.NORTH;
                } else {
                    dir = SwingConstants.SOUTH;
                }
            }
        } else if (headDir == SwingConstants.EAST) {
            //System.out.println("head is west");
            if ((xDiff < 0) && ((yDiff * yDiff) < TOL)
                    && (tailDir == SwingConstants.WEST)) {
                //System.out.println("completing");
                point = tail;
                dir = tailDir;
            } else {
                if (xDiff > 0) {
                    //System.out.println("routing backwards");
                    point = new Point2D.Double(head.getX() + MINDIST, head
                            .getY());
                } else if (((yDiff > 0) && (tailDir == SwingConstants.SOUTH))
                        || ((yDiff < 0) && (tailDir == SwingConstants.NORTH))) {
                    //System.out.println("completing 90");
                    point = new Point2D.Double(tail.getX(), head.getY());
                } else if (headDir == tailDir) {
                    double pos = Math.max(head.getX(), tail.getX()) + MINDIST;
                    point = new Point2D.Double(pos, head.getY());
                } else {
                    point = new Point2D.Double(head.getX() - (xDiff / 2), head
                            .getY());
                }


                if (yDiff > 0) {
                    dir = SwingConstants.NORTH;
                } else {
                    dir = SwingConstants.SOUTH;
                }
            }
        } else if (headDir == SwingConstants.SOUTH) {
            //System.out.println("head is north");
            if (((xDiff * xDiff) < TOL) && (yDiff < 0)
                    && (tailDir == SwingConstants.NORTH)) {
                //System.out.println("completing");
                point = tail;
                dir = tailDir;
            } else {
                if (yDiff > 0) {
                    //System.out.println("routing backwards");
                    point = new Point2D.Double(head.getX(), head.getY()
                            + MINDIST);
                } else if (((xDiff > 0) && (tailDir == SwingConstants.EAST))
                        || ((xDiff < 0) && (tailDir == SwingConstants.WEST))) {
                    //System.out.println("completing 90");
                    point = new Point2D.Double(head.getX(), tail.getY());
                } else if (headDir == tailDir) {
                    double pos = Math.max(head.getY(), tail.getY()) + MINDIST;
                    point = new Point2D.Double(head.getX(), pos);
                } else {
                    point = new Point2D.Double(head.getX(), head.getY()
                            - (yDiff / 2));
                }


                if (xDiff > 0) {
                    dir = SwingConstants.WEST;
                } else {
                    dir = SwingConstants.EAST;
                }
            }
        } else if (headDir == SwingConstants.NORTH) {
            //System.out.println("head is south");
            if (((xDiff * xDiff) < TOL) && (yDiff > 0)
                    && (tailDir == SwingConstants.SOUTH)) {
                //System.out.println("completing");
                point = tail;
                dir = tailDir;
            } else {
                if (yDiff < 0) {
                    //System.out.println("routing backwards");
                    point = new Point2D.Double(head.getX(), head.getY()
                            - MINDIST);
                } else if (((xDiff > 0) && (tailDir == SwingConstants.EAST))
                        || ((xDiff < 0) && (tailDir == SwingConstants.WEST))) {
                    //System.out.println("completing 90");
                    point = new Point2D.Double(head.getX(), tail.getY());
                } else if (headDir == tailDir) {
                    double pos = Math.min(head.getY(), tail.getY()) - MINDIST;
                    point = new Point2D.Double(head.getX(), pos);
                } else {
                    point = new Point2D.Double(head.getX(), head.getY()
                            - (yDiff / 2));
                }


                if (xDiff > 0) {
                    dir = SwingConstants.WEST;
                } else {
                    dir = SwingConstants.EAST;
                }
            }
        } else {
            throw new RuntimeException("unknown dir");
        }


        Polyline2D route = _route(point, dir, tail, tailDir);
        route.lineTo(head.getX(), head.getY());


        //System.out.println("route = " + route);
        return route;
    }

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    /**
     * Reroute the given Shape, given that the head site moved.
     */
    public void rerouteHead(Connector c, Shape s) {
        Polyline2D line = (Polyline2D) s;


        line.setX(1, c.getHeadSite().getX());
        line.setY(1, c.getHeadSite().getY());
    }

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    /**
     * Reroute the given Shape, given that the tail site moved.
     */
    public void rerouteTail(Connector c, Shape s) {
        Polyline2D line = (Polyline2D) s;
        line.setX(0, c.getHeadSite().getX());
        line.setY(0, c.getHeadSite().getY());
    }

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    /** Create a polyline. Again, this uses the BasicFigure class,
     * but this time the shape is an instance of <b>diva.util.Polyline2D</b>.
     */
    public void createPolyline() {
        FigureLayer layer = graphicsPane.getForegroundLayer();
        Polyline2D path = new Polyline2D.Double();
        path.moveTo(240, 120);
        path.lineTo(280, 140);
        path.lineTo(240, 160);
        path.lineTo(280, 180);
        path.lineTo(240, 200);
        path.lineTo(280, 220);
        path.lineTo(240, 240);


        Figure line = new BasicFigure(path);
        layer.add(line);
    }

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