Examples with OrthogonalPolyLine com.ait.lienzo.client.core.shape.OrthogonalPolyLine used on opensource projects

Example 1 with OrthogonalPolyLine

use of com.ait.lienzo.client.core.shape.OrthogonalPolyLine in project lienzo-core by ahome-it.

the class ShapeControlUtils method checkForAndApplyLineSplice.

public static boolean checkForAndApplyLineSplice(final WiresManager wiresManager, final WiresShape shape) {
    if (!wiresManager.isSpliceEnabled() || (shape.getMagnets() == null)) {
        // cannot connect to a shape with no magnets.
        return true;
    }
    boolean accept = true;
    for (final WiresConnector c : wiresManager.getConnectorList()) {
        final Point2DArray linePoints = ((OrthogonalPolyLine) c.getLine()).getComputedPoint2DArray();
        final MultiPath path = shape.getPath();
        Point2DArray intersectPoints = null;
        final Point2D absLoc = path.getComputedLocation();
        intersectPoints = getIntersections(linePoints, path, intersectPoints, absLoc);
        if (((c.getHeadConnection().getMagnet() != null) && (c.getHeadConnection().getMagnet().getMagnets().getWiresShape() == shape)) || ((c.getTailConnection().getMagnet() != null) && (c.getTailConnection().getMagnet().getMagnets().getWiresShape() == shape))) {
            // don't split yourself
            return accept;
        }
        if (intersectPoints != null) {
            final WiresConnection headCon = c.getHeadConnection();
            final WiresConnection tailCon = c.getTailConnection();
            if (intersectPoints.size() == 1) {
                // one arrow end is enclosed in the shape, we can only splice/connect if that connection is not already connected.
                final BoundingBox bbox = shape.getContainer().getComputedBoundingPoints().getBoundingBox();
                if (bbox.contains(headCon.getPoint()) && (headCon.getMagnet() != null)) {
                    return accept;
                } else if (bbox.contains(tailCon.getPoint()) && (headCon.getMagnet() != null)) {
                    return accept;
                } else {
                    throw new RuntimeException("Defensive programming: should not be possible if there is a single intersection.");
                }
            }
            c.getWiresConnectorHandler().getControl().hideControlPoints();
            final Point2DArray oldPoints = c.getLine().getPoint2DArray();
            int firstSegmentIndex = Integer.MAX_VALUE;
            int lastSegmentIndex = 0;
            for (final Point2D p : intersectPoints) {
                final double x = p.getX() + absLoc.getX();
                final double y = p.getY() + absLoc.getY();
                // get first and last segment, this can happen if shape straddles multiple segments of the line
                final int pointIndex = WiresConnectorControlImpl.getIndexForSelectedSegment(c, (int) x, (int) y, oldPoints);
                if (pointIndex < firstSegmentIndex) {
                    firstSegmentIndex = pointIndex;
                }
                if (pointIndex > lastSegmentIndex) {
                    lastSegmentIndex = pointIndex;
                }
            }
            WiresConnector c2 = null;
            // record these, as they may need restoring later.
            double tailXOffset = 0;
            double tailYOffset = 0;
            boolean tailAutoConnection = false;
            Point2D tailPoint = null;
            WiresMagnet tailMagnet = null;
            if (tailCon != null) {
                tailXOffset = tailCon.getXOffset();
                tailYOffset = tailCon.getYOffset();
                tailAutoConnection = tailCon.isAutoConnection();
                tailMagnet = tailCon.getMagnet();
                tailPoint = tailCon.getPoint();
            }
            if (firstSegmentIndex > 0) {
                final Point2DArray newPoints1 = new Point2DArray();
                final Point2DArray newPoints2 = new Point2DArray();
                newPoints1.push(oldPoints.get(0));
                for (int i = 1; i < firstSegmentIndex; i++) {
                    newPoints1.push(oldPoints.get(i));
                }
                final WiresMagnet cmagnet = shape.getMagnets().getMagnet(1);
                // check if isAllowed
                WiresConnectionControlImpl.allowedMagnetAndUpdateAutoConnections(headCon, true, shape, cmagnet, false);
                accept = accept && WiresConnectionControlImpl.allowedMagnetAndUpdateAutoConnections(tailCon, false, shape, cmagnet, false);
                if (!accept) {
                    return accept;
                }
                if (intersectPoints.size() > 1) {
                    final Point2D startPoint = new Point2D(cmagnet.getControl().getX(), cmagnet.getControl().getY());
                    newPoints2.push(startPoint);
                    // will skip any segments between first and last. this happens if a shape straddles multiple segments.
                    for (int i = lastSegmentIndex; i < oldPoints.size(); i++) {
                        newPoints2.push(oldPoints.get(i));
                    }
                    final AbstractDirectionalMultiPointShape<?> line = c.getLine().copy();
                    line.setPoint2DArray(newPoints2);
                    c2 = new WiresConnector(line, c.getHeadDecorator().copy(), c.getTailDecorator().copy());
                    wiresManager.register(c2);
                    final WiresConnection headCon2 = c2.getHeadConnection();
                    headCon2.setAutoConnection(true);
                    // reset, if not already 0
                    headCon2.setXOffset(0);
                    headCon2.setYOffset(0);
                    final WiresConnection tailCon2 = c2.getTailConnection();
                    // preserve tail auto connection
                    tailCon2.setAutoConnection(tailCon.isAutoConnection());
                    tailCon2.setMagnet(tailCon.getMagnet());
                    // reset, if not already 0
                    tailCon2.setXOffset(tailCon.getXOffset());
                    tailCon2.setYOffset(tailCon.getYOffset());
                    tailCon2.setPoint(tailCon.getPoint());
                    accept = accept && WiresConnectionControlImpl.allowedMagnetAndUpdateAutoConnections(headCon2, true, shape, cmagnet, true);
                    if (!accept) {
                        // we already checked isAllowed before mutation, so this in theory should not be needed. Adding for future proofing and completeness - in
                        // case a future version doesn't require identical behavioural logic for allowed and accept.
                        tailCon2.setMagnet(null);
                        wiresManager.deregister(c2);
                        return accept;
                    }
                }
                // this is done after the potential newPoitns2, as it reads values from the original connector.
                final Point2D endPoint = new Point2D(cmagnet.getControl().getX(), cmagnet.getControl().getY());
                newPoints1.push(endPoint);
                tailCon.setAutoConnection(true);
                // reset, if not already 0
                tailCon.setXOffset(0);
                tailCon.setYOffset(0);
                tailCon.setPoint(endPoint);
                c.getLine().setPoint2DArray(newPoints1);
                accept = accept && WiresConnectionControlImpl.allowedMagnetAndUpdateAutoConnections(tailCon, false, shape, cmagnet, true);
                if (!accept) {
                    // case a future version doesn't require identical behavioural logic for allowed and accept.
                    if (c2 != null) {
                        c2.getTailConnection().setMagnet(null);
                        c2.getHeadConnection().setMagnet(null);
                        wiresManager.deregister(c2);
                    }
                    tailCon.setAutoConnection(tailAutoConnection);
                    // reset, if not already 0
                    tailCon.setXOffset(tailXOffset);
                    tailCon.setYOffset(tailYOffset);
                    tailCon.setMagnet(tailMagnet);
                    tailCon.setPoint(tailPoint);
                    return accept;
                }
            }
        }
    }
    return accept;
}