public void onEvent(EventObject evt) {

        if (evt instanceof ShapeCreatedEvent) {

            Object source = evt.getSource();

            cgShape shape = ((ShapeCreatedEvent) evt).getShape();

            if (!(shape instanceof cgPolyline)) {

                return;

            }

            if (source instanceof ILayer2D) {

                ILayer2D layer = (ILayer2D) source;

                ILayeredWindow window = layer.getViewerWindow();

                if (window instanceof IMapWindow) {

                    IMapWindow mapWindow = (IMapWindow) window;

                    cgPolyline polyline = (cgPolyline) shape;

                    double xValues[] = polyline.getXValues();

                    double yValues[] = polyline.getYValues();

                    if (mapWindow.getDisplayMode() == IMapWindow.XY) {

                        // transform to IJ if map is in XY

                        IJToXYTransformation tr = mapWindow.getIJToXYTransformation();

                        if (tr == null || !tr.isValidCoordMatrix()) {

                            return;

                        }

                        double tValues[];

                        for (int i=0; i<xValues.length; i++) {

                            tValues = tr.invCoordTrans(xValues[i], yValues[i]);

                            xValues[i] = tValues[0];

                            yValues[i] = tValues[1];

                        }

                    }

                    // print the values into a text pane

                    String buffer = "";

                    for (int i=0; i<xValues.length; i++) {

                        buffer += xValues[i] + " " + yValues[i] + "\n";

                    }

                    jTextPane1.setText(buffer);

                }

            }

        }

    }