LineInfoDisplayer.java

import javafx.scene.shape.Line;

@FunctionalInterface
public interface LineInfoDisplayer {

    String getInfo(Line line);

    public static enum InfoType {
        DISTANCE, MIDPOINT, VERTHORZ;
    }

    public static LineInfoDisplayer createLineInfoDisplayer(InfoType type) {
        //if (Line.line != null)
        if (type == InfoType.DISTANCE) {
            return line -> {
                String outputString = "";

                if (line != null) {
                    double xParam = Math.abs(line.getEndX() - line.getStartX());
                    double yParam = Math.abs(line.getEndY() - line.getStartY());
                    double distance = Math.hypot(xParam, yParam);
                    outputString = String.format("DISTANCE: %,.2f", distance);
                }
                return outputString;
            };
        } else if (type == InfoType.MIDPOINT) {
            return line -> {
                String outputString = "";

                if (line != null) {
                    double xMid = (line.getStartX() + line.getEndX()) / 2;
                    double yMid = (line.getStartY() + line.getEndY()) / 2;
                    outputString = String.format("MIDPOINT: %,.0f,%,.0f", xMid, yMid);
                }
                return outputString;
            };
        } else if (type == InfoType.VERTHORZ) {
            return line -> {
                String outputString = "";

                if (line != null) {
                    boolean isVertical = Double.compare(line.getStartX(), line.getEndX()) == 0;
                    boolean isHorizontal = Double.compare(line.getStartY(), line.getEndY()) == 0;
                    outputString = String.format("HORIZONTAL? %b\nVERTICAL? %b",isHorizontal,
                            isVertical);
                }
                return outputString;

            };
        } else {
            return null;
        }
    } // end createLineInfoDisplayer()
} // end LineInfoDisplayer