void addSelection() {
   ImagePlus imp = IJ.getImage();
   String macroOptions = Macro.getOptions();
   if (macroOptions != null && IJ.macroRunning() && macroOptions.indexOf("remove") != -1) {
     imp.setOverlay(null);
     return;
   }
   Roi roi = imp.getRoi();
   if (roi == null && imp.getOverlay() != null) {
     GenericDialog gd = new GenericDialog("No Selection");
     gd.addMessage("\"Overlay>Add\" requires a selection.");
     gd.setInsets(15, 40, 0);
     gd.addCheckbox("Remove existing overlay", false);
     gd.showDialog();
     if (gd.wasCanceled()) return;
     if (gd.getNextBoolean()) imp.setOverlay(null);
     return;
   }
   if (roi == null) {
     IJ.error("This command requires a selection.");
     return;
   }
   roi = (Roi) roi.clone();
   if (roi.getStrokeColor() == null) roi.setStrokeColor(Toolbar.getForegroundColor());
   int width = Line.getWidth();
   Rectangle bounds = roi.getBounds();
   boolean tooWide = width > Math.max(bounds.width, bounds.height) / 3.0;
   if (roi.getStroke() == null && width > 1 && !tooWide) roi.setStrokeWidth(Line.getWidth());
   Overlay overlay = imp.getOverlay();
   if (overlay != null && overlay.size() > 0 && !roi.isDrawingTool()) {
     Roi roi2 = overlay.get(overlay.size() - 1);
     if (roi.getStroke() == null) roi.setStrokeWidth(roi2.getStrokeWidth());
     if (roi.getFillColor() == null) roi.setFillColor(roi2.getFillColor());
   }
   boolean points = roi instanceof PointRoi && ((PolygonRoi) roi).getNCoordinates() > 1;
   if (points) roi.setStrokeColor(Color.red);
   if (!IJ.altKeyDown() && !(roi instanceof Arrow)) {
     RoiProperties rp = new RoiProperties("Add to Overlay", roi);
     if (!rp.showDialog()) return;
   }
   String name = roi.getName();
   boolean newOverlay = name != null && name.equals("new-overlay");
   if (overlay == null || newOverlay) overlay = new Overlay();
   overlay.add(roi);
   imp.setOverlay(overlay);
   overlay2 = overlay;
   if (points || (roi instanceof ImageRoi) || (roi instanceof Arrow)) imp.killRoi();
   Undo.setup(Undo.OVERLAY_ADDITION, imp);
 }
 private void drawRoi(Roi roi, Graphics g) {
   if (roi == currentRoi) {
     Color lineColor = roi.getStrokeColor();
     Color fillColor = roi.getFillColor();
     float lineWidth = roi.getStrokeWidth();
     roi.setStrokeColor(null);
     roi.setFillColor(null);
     boolean strokeSet = roi.getStroke() != null;
     if (strokeSet) roi.setStrokeWidth(1);
     roi.draw(g);
     roi.setStrokeColor(lineColor);
     if (strokeSet) roi.setStrokeWidth(lineWidth);
     roi.setFillColor(fillColor);
     currentRoi = null;
   } else roi.draw(g);
 }