Hi!
i am trying to add breadcrumbs Breadcrumb Component - Vaadin Add-on Directory. I have a custom Annotation HeaderTitle which i tried to use as a breadcrumb.
Currently i am cunfused and need some input.
the NavigationObserver looks like if it is too early, then the dom is not rendered
Layout:
@Override
public void beforeEnter(BeforeEnterEvent event) {
if (!hasAccess(event.getNavigationTarget())) {
event.rerouteTo(AccessDeniedView.class);
}
setBreadcrumbFromLocation(event.getLocation());
Class<?> viewClass = event.getNavigationTarget();
HeaderTitle pageTitleAnnotation = viewClass.getAnnotation(HeaderTitle.class);
if (pageTitleAnnotation != null) {
dynamicSpan.setText(pageTitleAnnotation.value());
} else {
dynamicSpan.setText(""); // Fallback-Titel
}
}
private boolean hasAccess(Class<?> navigationTarget) {
return securityUtils.isAccessGrantedToView(navigationTarget);
}
public void setBreadcrumbFromLocation(Location location) {
breadcrumbs.removeAll();
// Startpunkt
breadcrumbs.add(new Breadcrumb("Home", "/"));
StringBuilder pathBuilder = new StringBuilder();
List<String> segments = location.getSegments();
for (int i = 0; i < segments.size(); i++) {
String segment = segments.get(i);
pathBuilder.append("/").append(segment);
String label = mapSegmentToLabel(segment);
String href = pathBuilder.toString();
// Letztes Element: kein Link
if (i == segments.size() - 1) {
breadcrumbs.add(new Breadcrumb(label));
} else {
breadcrumbs.add(new Breadcrumb(label, href));
}
}
}
Thats way to difficult, i think there is a easier way to get it done. If someone already implemented this addon, i would really aprreciate some input how you have handled it.
, thank you!