com.vaadin.shared.Connector Java Examples

@Override
public void error(final ErrorEvent event) {

    // filter upload exceptions
    if (event.getThrowable() instanceof UploadException) {
        return;
    }

    final HawkbitErrorNotificationMessage message = buildNotification(getRootExceptionFrom(event));
    if (event instanceof ConnectorErrorEvent) {
        final Connector connector = ((ConnectorErrorEvent) event).getConnector();
        if (connector instanceof UI) {
            final UI uiInstance = (UI) connector;
            uiInstance.access(() -> message.show(uiInstance.getPage()));
            return;
        }
    }

    final Optional<Page> originError = getPageOriginError(event);
    if (originError.isPresent()) {
        message.show(originError.get());
        return;
    }

    HawkbitErrorNotificationMessage.show(message.getCaption(), message.getDescription(), Type.HUMANIZED_MESSAGE);
}
 

@Override
public Element getDragImageElement(Widget w) {
    ComponentConnector component = Util.findConnectorFor(w);
    Connector dragImage = state.referenceImageComponents.get(component);

    if (dragImage != null) {
        return ConnectorMap.get(component.getConnection())
                .getElement(dragImage.getConnectorId());
    }

    return null;
}
 

private static void addNonGrabbedComponents(List<Connector> nonGrabbable, Component component,
                                            DragGrabFilter dragGrabFilter) {
    if (!dragGrabFilter.canBeGrabbed(component)) {
        nonGrabbable.add(component);
    } else if (component instanceof HasComponents
            && !(component instanceof LayoutDragSource)) {
        for (Component child : ((HasComponents) component)) {
            addNonGrabbedComponents(nonGrabbable, child, dragGrabFilter);
        }
    }
}
 

/**
 * Finds the nearest component by traversing upwards in the hierarchy. If
 * connector is a Component, that Component is returned. Otherwise, looks
 * upwards in the hierarchy until it finds a {@link Component}.
 * 
 * @return A Component or null if no component was found
 */
public static Component findComponent(Connector connector) {
    if (connector instanceof Component) {
        return (Component) connector;
    }
    if (connector.getParent() != null) {
        return findComponent(connector.getParent());
    }

    return null;
}
 

/**
 * Returns a unmodifiable List of steps.
 *
 * @return List of steps
 */
public List<Step> getSteps() {
    List<Step> steps = new ArrayList<Step>();
    for (Connector sc : getState(false).steps) {
        steps.add(((StepComponent) sc).getState(false).step);
    }
    return Collections.unmodifiableList(steps);
}
 

@Override
public Iterator<Component> iterator() {
    List<Component> l = new ArrayList<Component>();
    for (Connector c : getState(false).steps) {
        l.add((Component) c);
    }
    return l.iterator();
}
 

protected List<StepWidget> getSteps() {
    List<StepWidget> steps = new ArrayList<StepWidget>();
    for (Connector sc : getState().steps) {
        steps.add(((StepConnector) sc).getWidget());
    }
    return steps;
}
 

protected Map<Step, StepWidget> getStepsMap() {
    Map<Step, StepWidget> steps = new HashMap<Step, StepWidget>();
    StepWidget stepWidget;
    for (Connector sc : getState().steps) {
        stepWidget = ((StepConnector) sc).getWidget();
        steps.put(((StepConnector) sc).getState().step, stepWidget);
    }
    return steps;
}
 

@Override
public Iterator<Component> iterator() {
    List<Component> l = new ArrayList<Component>();
    for (Connector c : getState(false).subSteps) {
        l.add((Component) c);
    }
    return l.iterator();
}
 

@Contract("null -> null")
public static Widget connector2Widget(@Nullable Connector connector) {
  if (connector == null) {
    return null;
  }
  ComponentConnector componentConnector = (ComponentConnector)connector;
  return componentConnector.getWidget();
}
 

private void reset(@Nullable Connector connector) {
  if (connector != null) {
    Component component = (Component)connector;

    component.setParent(null);
  }
}
 

public void setCapsLockIndicator(Connector capsLockIndicator) {
    getState().capsLockIndicator = capsLockIndicator;
}