*/
public ButtonList(int numberOfButtonDisplayed, int distanceBetweenButtons) {
super();
this.numberOfButtonsDisplayed = numberOfButtonDisplayed;
this.distanceBetweenButtons = distanceBetweenButtons;
InterfaceButton back = new InterfaceButton(
InterfaceFunctions.INTERFACE_BUTTONLIST_BACK,
"interface-icons/back-arrow.png"), forth = new InterfaceButton(
InterfaceFunctions.INTERFACE_BUTTONLIST_FORTH,
"interface-icons/forth-arrow.png");
this.list.put(BACK_POS, back);
this.invertList.put(back, BACK_POS);
this.add(back, Vector.ZERO);
this.list.put(FORTH_POS, forth);
this.invertList.put(forth, FORTH_POS);
this.add(forth, Vector.ZERO);
back.addInformable(this);
forth.addInformable(this);
}