private void buildHeader() {
header = new VerticalLayout();
header.setHeightUndefined();
addLangButtons();
addNavButtons();
addNavigation();
addBanner();
addComponent(header);
}
private void addBanner() {
Panel bannerPanel = new Panel();
bannerPanel.setHeight(Global.APP_BANNER_HEIGHT);
bannerPanel.setStyleName(BANNERPANEL.toString());
VerticalLayout banner = new VerticalLayout();
banner.addComponent(bannerPanel);
banner.setHeightUndefined();
header.addComponent(banner);
header.setComponentAlignment(banner, Alignment.TOP_CENTER);
}