AdjustOutlinePortInsidenessEdgePathCropper.java

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package complete.rotatablenodes;

import com.yworks.yfiles.geometry.GeneralPath;
import com.yworks.yfiles.geometry.Matrix2D;
import com.yworks.yfiles.geometry.PointD;
import com.yworks.yfiles.graph.IEdge;
import com.yworks.yfiles.graph.INode;
import com.yworks.yfiles.graph.styles.DefaultEdgePathCropper;
import com.yworks.yfiles.graph.styles.IShapeGeometry;


/**
 * Crops adjacent edges at the nodes rotated bounds for internal ports.
 */
public class AdjustOutlinePortInsidenessEdgePathCropper extends DefaultEdgePathCropper {

  private static final double FACTOR = 1.001d;

  /**
   * Checks whether or not the given location is inside the nodes rotated shape.
   */
  @Override
  protected boolean isInside(PointD location, INode node, IShapeGeometry nodeShapeGeometry, IEdge edge) {
    if (nodeShapeGeometry != null) {
      return  getScaledOutline(node, nodeShapeGeometry).areaContains(location);
    }
    return super.isInside(location, node, nodeShapeGeometry, edge);
  }


  /**
   * Returns the intersection point of the segment between the outer and inner and the node's rotated shape.
   * If there is no intersection point, the result is null.
   */
  @Override
  protected PointD getIntersection(INode node, IShapeGeometry nodeShapeGeometry, IEdge edge, PointD inner, PointD outer) {
    if (nodeShapeGeometry != null){
      double a = getScaledOutline(node, nodeShapeGeometry).findLineIntersection(inner, outer);
      if (a < Double.POSITIVE_INFINITY) {
        double returnValueX = inner.getX() + (outer.getX() - inner.getX()) * a;
        double returnValueY = inner.getY() + (outer.getY() - inner.getY()) * a;
        return new PointD(returnValueX, returnValueY);
      }
      return null;
    }
    return super.getIntersection(node, nodeShapeGeometry, edge, inner, outer);
  }

  /**
   * Returns a slightly enlarged outline of the shape to ensure that ports that lie exactly on the shape's
   * outline are always considered inside.
   */
  private GeneralPath getScaledOutline(INode node, IShapeGeometry nodeShapeGeometry) {
    GeneralPath outline = nodeShapeGeometry.getOutline();
    PointD center = node.getLayout().getCenter();
    Matrix2D matrix = new Matrix2D();

    matrix.translate(new PointD(-center.getX() * (FACTOR - 1), -center.getY() * (FACTOR - 1)));
    matrix.scale(FACTOR, FACTOR);
    outline.transform(matrix);
    return outline;
  }
}