LineTo arrowTop = new LineTo(TOOLBAR_WIDTH,0);
arrowTop.yProperty().bind(arrowH.add(-8));
LineTo arrowTip = new LineTo(TOOLBAR_WIDTH-10,0);
arrowTip.yProperty().bind(arrowH);
LineTo arrowBottom = new LineTo(TOOLBAR_WIDTH,0);
arrowBottom.yProperty().bind(arrowH.add(8));
LineTo bottomRight = new LineTo(TOOLBAR_WIDTH,0);
bottomRight.yProperty().bind(root.heightProperty());
LineTo bottomLeft = new LineTo(0,0);
bottomLeft.yProperty().bind(root.heightProperty());
toolBarBackground.getElements().addAll(