public Arrow(final Orientation orientation, final int borderWidth) {
  setElement(d);
  this.orientation = orientation;
  this.borderWidth = borderWidth;
  d.appendChild(d1);
  d.appendChild(d2);
  d.getStyle().setPosition(Position.ABSOLUTE);
  d1.getStyle().setPosition(Position.ABSOLUTE);
  d1.getStyle().setHeight(0, Unit.PX);
  d1.getStyle().setWidth(0, Unit.PX);
  d1.getStyle().setPropertyPx(orientation.pos, 0);
  d1.getStyle().setPropertyPx(orientation.altPos, 0);
  d1.getStyle().setBorderStyle(BorderStyle.SOLID);
  d2.getStyle().setPosition(Position.ABSOLUTE);
  d2.getStyle().setHeight(0, Unit.PX);
  d2.getStyle().setWidth(0, Unit.PX);
  d2.getStyle().setPropertyPx(orientation.pos, borderWidth);
  d2.getStyle().setPropertyPx(orientation.altPos, borderWidth);
  d2.getStyle().setBorderStyle(BorderStyle.SOLID);
  topBottom = orientation == Orientation.TOP || orientation == Orientation.BOTTOM;
}
 

private HorizontalPanel getColorPanel(Layer layer) {
	HorizontalPanel colorPanel = new HorizontalPanel();
	colorPanel.setSize("20px", "20px");
	colorPanel.getElement().getStyle()
			.setBackgroundColor(getColor(layer, "fillColor"));
	colorPanel.setBorderWidth(2);
	colorPanel.getElement().getStyle().setBorderStyle(BorderStyle.SOLID);
	colorPanel.getElement().getStyle()
			.setBorderColor(getColor(layer, "strokeColor"));
	return colorPanel;
}