Есть коллекция с объектами . На нее вешается листенер
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destinations.addListener((ListChangeListener<Destination>) c -> {
while (c.next()) {
if (c.wasAdded()) {
for (Destination added : c.getAddedSubList()) {
SimpleObjectProperty<Destination> property = new SimpleObjectProperty(added);
property.addListener(destinationListener);
getChildren().add(new Item(NEW, property, getPrefWidth(), getPrefHeight()));
}
}
}
});
Кусок кода
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getChildren().add(new Item(NEW, property, getPrefWidth(), getPrefHeight()));
добавляет новый элемент в TilePane. Тот листенер, который вешается на проперти:
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(observable, oldValue, newValue) -> {
if (Objects.isNull(newValue)) {
Node item = getChildren().stream().filter(n -> ((tem) n).getDestination() == null).findFirst().get();
getChildren().remove(item);
destinations.remove(oldValue);
}
};
Получается, если мы меняем значение проперти на null, должен выполниться этот кусок кода. На строчке, которая бы удаляла item из TilePane
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getChildren().remove(item);
рыгается exception
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Exception in thread "JavaFX Application Thread" java.lang.IllegalArgumentException: Children: duplicate children added: parent = RouteList@5df8ab3a[styleClass=tile-pane]
at javafx.scene.Parent$2.onProposedChange(Parent.java:450)
at com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:329)
at com.sun.javafx.collections.VetoableListDecorator.remove(VetoableListDecorator.java:221)
at com.RouteList.lambda$new$1(RouteList.java:25)
at com.RouteList$$Lambda$99/1993147782.changed(Unknown Source)
at com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:182)
at com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:81)
at javafx.beans.property.ObjectPropertyBase.fireValueChangedEvent(ObjectPropertyBase.java:105)
at javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:112)
at javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:145)
at com.RouteListItem.lambda$addRectangle$2(RouteListItem.java:70)
at com.RouteListItem$$Lambda$244/578608980.handle(Unknown Source)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
Какого *???
