Examples with StateTree com.vaadin.flow.internal.StateTree used on opensource projects

Example 31 with StateTree

use of com.vaadin.flow.internal.StateTree in project flow by vaadin.

the class ElementListenersTest method mapEventTargetToElement_targetNodeIdInJsonData_elementMapped.

@Test
public void mapEventTargetToElement_targetNodeIdInJsonData_elementMapped() {
    Element parent = new Element("parent");
    Element child = new Element("child");
    Element grandChild = new Element("grandChild");
    parent.appendChild(child.appendChild(grandChild));
    new StateTree(new UI().getInternals(), ElementChildrenList.class).getUI().getElement().appendChild(parent);
    final String eventType = "click";
    AtomicReference<Element> capturedTarget = new AtomicReference<>();
    final DomListenerRegistration registration = parent.addEventListener(eventType, e -> {
        capturedTarget.set(e.getEventTarget().orElse(null));
    });
    final ElementListenerMap listenerMap = parent.getNode().getFeature(ElementListenerMap.class);
    Set<String> expressions = getExpressions(listenerMap, eventType);
    Assert.assertEquals(0, expressions.size());
    registration.mapEventTargetElement();
    expressions = getExpressions(listenerMap, eventType);
    Assert.assertEquals(1, expressions.size());
    Assert.assertEquals(JsonConstants.MAP_STATE_NODE_EVENT_DATA, expressions.iterator().next());
    // child
    final JsonObject eventData = Json.createObject();
    eventData.put(JsonConstants.MAP_STATE_NODE_EVENT_DATA, child.getNode().getId());
    listenerMap.fireEvent(new DomEvent(parent, eventType, eventData));
    Assert.assertEquals(child, capturedTarget.get());
    // nothing reported -> empty optional
    listenerMap.fireEvent(new DomEvent(parent, eventType, Json.createObject()));
    Assert.assertNull("no element should be reported", capturedTarget.get());
    // grandchild
    eventData.put(JsonConstants.MAP_STATE_NODE_EVENT_DATA, grandChild.getNode().getId());
    listenerMap.fireEvent(new DomEvent(parent, eventType, eventData));
    Assert.assertEquals(grandChild, capturedTarget.get());
    // -1 -> empty optional
    eventData.put(JsonConstants.MAP_STATE_NODE_EVENT_DATA, -1);
    listenerMap.fireEvent(new DomEvent(parent, eventType, eventData));
    Assert.assertNull("no element should be reported", capturedTarget.get());
}

Example 32 with StateTree

use of com.vaadin.flow.internal.StateTree in project flow by vaadin.

the class ElementListenersTest method addEventDataElement_eventTarget_usesMapEventTargetInstead.

@Test
public void addEventDataElement_eventTarget_usesMapEventTargetInstead() {
    Element parent = new Element("parent");
    Element child = new Element("child");
    parent.appendChild(child);
    new StateTree(new UI().getInternals(), ElementChildrenList.class).getUI().getElement().appendChild(parent);
    final String eventType = "click";
    AtomicReference<DomEvent> capturedTarget = new AtomicReference<>();
    final DomListenerRegistration registration = parent.addEventListener(eventType, capturedTarget::set);
    final ElementListenerMap listenerMap = parent.getNode().getFeature(ElementListenerMap.class);
    registration.addEventDataElement("event.target");
    Set<String> expressions = getExpressions(listenerMap, eventType);
    Assert.assertEquals(1, expressions.size());
    Assert.assertEquals(JsonConstants.MAP_STATE_NODE_EVENT_DATA, expressions.iterator().next());
    final JsonObject eventData = Json.createObject();
    eventData.put(JsonConstants.MAP_STATE_NODE_EVENT_DATA, child.getNode().getId());
    listenerMap.fireEvent(new DomEvent(parent, eventType, eventData));
    Assert.assertEquals(child, capturedTarget.get().getEventTarget().get());
    Assert.assertEquals(child, capturedTarget.get().getEventDataElement("event.target").get());
}