Interface Val<T>

    • Method Summary

      All Methods Static Methods Instance Methods Default Methods 
      Modifier and Type Method Description
      default void addInvalidationObserver​(java.util.function.Consumer<? super T> observer)  
      default void addListener​(javafx.beans.InvalidationListener listener)  
      default void addListener​(javafx.beans.value.ChangeListener<? super T> listener)  
      default Val<T> animate​(java.time.Duration duration, Interpolator<T> interpolator)
      Returns a new Val that gradually transitions to the value of this Val every time this Val changes.
      default Val<T> animate​(java.util.function.BiFunction<? super T,​? super T,​java.time.Duration> duration, Interpolator<T> interpolator)
      Returns a new Val that gradually transitions to the value of this Val every time this Val changes.
      static <T extends javafx.animation.Interpolatable<T>>
      Val<T>
      animate​(javafx.beans.value.ObservableValue<T> obs, java.time.Duration duration)
      Like animate(ObservableValue, Duration, Interpolator), but uses the interpolation defined by the Interpolatable type T.
      static <T> Val<T> animate​(javafx.beans.value.ObservableValue<T> obs, java.time.Duration duration, Interpolator<T> interpolator)
      Creates a new Val that gradually transitions to the value of the given ObservableValue obs every time obs changes.
      static <T extends javafx.animation.Interpolatable<T>>
      Val<T>
      animate​(javafx.beans.value.ObservableValue<T> obs, java.util.function.BiFunction<? super T,​? super T,​java.time.Duration> duration)
      Like animate(ObservableValue, BiFunction, Interpolator), but uses the interpolation defined by the Interpolatable type T.
      static <T> Val<T> animate​(javafx.beans.value.ObservableValue<T> obs, java.util.function.BiFunction<? super T,​? super T,​java.time.Duration> duration, Interpolator<T> interpolator)
      Creates a new Val that gradually transitions to the value of the given ObservableValue obs every time obs changes.
      default LiveList<T> asList()
      Returns a LiveList view of this Val.
      default Var<T> asVar​(java.util.function.Consumer<T> setValue)
      Let's this Val be viewed as a Var, with the given setValue function serving the purpose of WritableValue.setValue(Object).
      default EventStream<Change<T>> changes()
      Returns a stream of changed values, which emits the changed value (i.e.
      static <A,​B,​R>
      Val<R>
      combine​(javafx.beans.value.ObservableValue<A> src1, javafx.beans.value.ObservableValue<B> src2, java.util.function.BiFunction<? super A,​? super B,​? extends R> f)  
      static <A,​B,​C,​D,​E,​F,​R>
      Val<R>
      combine​(javafx.beans.value.ObservableValue<A> src1, javafx.beans.value.ObservableValue<B> src2, javafx.beans.value.ObservableValue<C> src3, javafx.beans.value.ObservableValue<D> src4, javafx.beans.value.ObservableValue<E> src5, javafx.beans.value.ObservableValue<F> src6, HexaFunction<? super A,​? super B,​? super C,​? super D,​? super E,​? super F,​? extends R> f)  
      static <A,​B,​C,​D,​E,​R>
      Val<R>
      combine​(javafx.beans.value.ObservableValue<A> src1, javafx.beans.value.ObservableValue<B> src2, javafx.beans.value.ObservableValue<C> src3, javafx.beans.value.ObservableValue<D> src4, javafx.beans.value.ObservableValue<E> src5, PentaFunction<? super A,​? super B,​? super C,​? super D,​? super E,​? extends R> f)  
      static <A,​B,​C,​D,​R>
      Val<R>
      combine​(javafx.beans.value.ObservableValue<A> src1, javafx.beans.value.ObservableValue<B> src2, javafx.beans.value.ObservableValue<C> src3, javafx.beans.value.ObservableValue<D> src4, TetraFunction<? super A,​? super B,​? super C,​? super D,​? extends R> f)  
      static <A,​B,​C,​R>
      Val<R>
      combine​(javafx.beans.value.ObservableValue<A> src1, javafx.beans.value.ObservableValue<B> src2, javafx.beans.value.ObservableValue<C> src3, TriFunction<? super A,​? super B,​? super C,​? extends R> f)  
      default Val<T> conditionOn​(javafx.beans.value.ObservableValue<java.lang.Boolean> condition)
      Returns a new Val that only observes this Val when condition is true.
      static <T> Val<T> conditionOn​(javafx.beans.value.ObservableValue<T> obs, javafx.beans.value.ObservableValue<java.lang.Boolean> condition)  
      static <T> Val<T> conditionOnShowing​(javafx.beans.value.ObservableValue<T> obs, javafx.scene.Node node)  
      default Val<T> conditionOnShowing​(javafx.scene.Node node)
      Equivalent to conditionOn(ObservableValue) where the condition is that node is showing: it is part of a scene graph (Node.sceneProperty() is not null), its scene is part of a window (Scene.windowProperty() is not null) and the window is showing (Window.showingProperty() is true).
      static <T> Val<T> constant​(T value)
      Returns a constant Val that holds the given value.
      static <T> Val<T> create​(java.util.function.Supplier<? extends T> computeValue, javafx.beans.Observable... dependencies)  
      static <T> Val<T> create​(java.util.function.Supplier<? extends T> computeValue, EventStream<?> invalidations)  
      default Val<T> filter​(java.util.function.Predicate<? super T> p)
      Returns a new Val that holds the same value as this Val when the value satisfies the predicate and is empty when this Val is empty or its value does not satisfy the given predicate.
      static <T> Val<T> filter​(javafx.beans.value.ObservableValue<T> src, java.util.function.Predicate<? super T> p)  
      default <U> Val<U> flatMap​(java.util.function.Function<? super T,​? extends javafx.beans.value.ObservableValue<U>> f)
      Returns a new Val that, when this Val holds value x, holds the value held by f(x), and is empty when this Val is empty.
      static <T,​U>
      Val<U>
      flatMap​(javafx.beans.value.ObservableValue<T> src, java.util.function.Function<? super T,​? extends javafx.beans.value.ObservableValue<U>> f)  
      default java.util.Optional<T> getOpt()
      Returns an Optional describing the value currently held by this Val, or and empty Optional if this Val is empty.
      default T getOrElse​(T defaultValue)
      Returns the value currently held by this Val.
      default T getOrSupply​(java.util.function.Supplier<? extends T> defaultSupplier)
      Like getOrElse(Object), except the default value is computed by defaultSupplier only when necessary.
      default T getOrThrow()
      Returns the value currently held by this Val.
      default void ifPresent​(java.util.function.Consumer<? super T> f)
      Invokes the given function if this Val holds a (non-null) value.
      default EventStream<T> invalidations()
      Returns a stream of invalidated values, which emits the invalidated value (i.e.
      default boolean isEmpty()
      Inverse of isPresent().
      default boolean isPresent()
      Checks whether this Val holds a (non-null) value.
      default <U> Val<U> map​(java.util.function.Function<? super T,​? extends U> f)
      Returns a new Val that holds a mapping of the value held by this Val, and is empty when this Val is empty.
      static <T,​U>
      Val<U>
      map​(javafx.beans.value.ObservableValue<T> src, java.util.function.Function<? super T,​? extends U> f)  
      default <U> Val<U> mapDynamic​(javafx.beans.value.ObservableValue<? extends java.util.function.Function<? super T,​? extends U>> f)
      Like map(Function), but also allows dynamically changing map function.
      static <T,​U>
      Val<U>
      mapDynamic​(javafx.beans.value.ObservableValue<T> src, javafx.beans.value.ObservableValue<? extends java.util.function.Function<? super T,​? extends U>> f)  
      default Subscription observeChanges​(javafx.beans.value.ChangeListener<? super T> listener)
      Adds a change listener and returns a Subscription that can be used to remove that listener.
      static <T> Subscription observeChanges​(javafx.beans.value.ObservableValue<? extends T> obs, javafx.beans.value.ChangeListener<? super T> listener)  
      default Subscription observeInvalidations​(java.util.function.Consumer<? super T> oldValueObserver)  
      static Subscription observeInvalidations​(javafx.beans.value.ObservableValue<?> obs, javafx.beans.InvalidationListener listener)  
      static <T> Val<T> orElse​(javafx.beans.value.ObservableValue<? extends T> src, javafx.beans.value.ObservableValue<? extends T> other)  
      default Val<T> orElse​(javafx.beans.value.ObservableValue<T> other)
      Returns a new Val that holds the value held by this Val, or the value held by other when this Val is empty.
      static <T> Val<T> orElseConst​(javafx.beans.value.ObservableValue<? extends T> src, T other)  
      default Val<T> orElseConst​(T other)
      Returns a new Val that holds the value held by this Val, or other when this Val is empty.
      default Subscription pin()  
      default void removeInvalidationObserver​(java.util.function.Consumer<? super T> observer)  
      default void removeListener​(javafx.beans.InvalidationListener listener)  
      default void removeListener​(javafx.beans.value.ChangeListener<? super T> listener)  
      default <U> Var<U> selectVar​(java.util.function.Function<? super T,​? extends javafx.beans.property.Property<U>> f)
      Similar to flatMap(Function), except the returned Val is also a Var.
      default <U> Var<U> selectVar​(java.util.function.Function<? super T,​? extends javafx.beans.property.Property<U>> f, U resetToOnUnbind)  
      static <T,​U>
      Var<U>
      selectVar​(javafx.beans.value.ObservableValue<T> src, java.util.function.Function<? super T,​? extends javafx.beans.property.Property<U>> f)  
      static <T,​U>
      Var<U>
      selectVar​(javafx.beans.value.ObservableValue<T> src, java.util.function.Function<? super T,​? extends javafx.beans.property.Property<U>> f, U resetToOnUnbind)  
      static Val<java.lang.Boolean> showingProperty​(javafx.scene.Node node)
      Returns a Val whose value is true when node is showing: it is part of a scene graph (Node.sceneProperty() is not null), its scene is part of a window (Scene.windowProperty() is not null) and the window is showing (Window.showingProperty() is true).
      default SuspendableVal<T> suspendable()  
      static <T> SuspendableVal<T> suspendable​(javafx.beans.value.ObservableValue<T> obs)  
      default EventStream<T> values()
      Returns a stream of values of this Val.
      static <T> Val<T> wrap​(javafx.beans.value.ObservableValue<T> obs)
      Returns a Val wrapper around ObservableValue.
      • Methods inherited from interface javafx.beans.value.ObservableValue

        getValue
    • Method Detail

      • addInvalidationObserver

        default void addInvalidationObserver​(java.util.function.Consumer<? super T> observer)
      • removeInvalidationObserver

        default void removeInvalidationObserver​(java.util.function.Consumer<? super T> observer)
      • observeInvalidations

        default Subscription observeInvalidations​(java.util.function.Consumer<? super T> oldValueObserver)
      • addListener

        default void addListener​(javafx.beans.InvalidationListener listener)
        Specified by:
        addListener in interface javafx.beans.Observable
      • removeListener

        default void removeListener​(javafx.beans.InvalidationListener listener)
        Specified by:
        removeListener in interface javafx.beans.Observable
      • addListener

        default void addListener​(javafx.beans.value.ChangeListener<? super T> listener)
        Specified by:
        addListener in interface javafx.beans.value.ObservableValue<T>
      • removeListener

        default void removeListener​(javafx.beans.value.ChangeListener<? super T> listener)
        Specified by:
        removeListener in interface javafx.beans.value.ObservableValue<T>
      • observeChanges

        default Subscription observeChanges​(javafx.beans.value.ChangeListener<? super T> listener)
        Adds a change listener and returns a Subscription that can be used to remove that listener.
      • invalidations

        default EventStream<T> invalidations()
        Returns a stream of invalidated values, which emits the invalidated value (i.e. the old value) on each invalidation of this observable value.
      • changes

        default EventStream<Change<T>> changes()
        Returns a stream of changed values, which emits the changed value (i.e. the old and the new value) on each change of this observable value.
      • values

        default EventStream<T> values()
        Returns a stream of values of this Val. The returned stream emits the current value of this Val for each new subscriber and then the new value whenever the value changes.
      • isPresent

        default boolean isPresent()
        Checks whether this Val holds a (non-null) value.
        Returns:
        true if this Val holds a (non-null) value, false otherwise.
      • isEmpty

        default boolean isEmpty()
        Inverse of isPresent().
      • ifPresent

        default void ifPresent​(java.util.function.Consumer<? super T> f)
        Invokes the given function if this Val holds a (non-null) value.
        Parameters:
        f - function to invoke on the value currently held by this Val.
      • getOrThrow

        default T getOrThrow()
        Returns the value currently held by this Val.
        Throws:
        java.util.NoSuchElementException - if there is no value present.
      • getOrElse

        default T getOrElse​(T defaultValue)
        Returns the value currently held by this Val. If this Val is empty, defaultValue is returned instead.
        Parameters:
        defaultValue - value to return if there is no value present in this Val.
      • getOrSupply

        default T getOrSupply​(java.util.function.Supplier<? extends T> defaultSupplier)
        Like getOrElse(Object), except the default value is computed by defaultSupplier only when necessary.
        Parameters:
        defaultSupplier - computation to produce default value, if this Val is empty.
      • getOpt

        default java.util.Optional<T> getOpt()
        Returns an Optional describing the value currently held by this Val, or and empty Optional if this Val is empty.
      • orElseConst

        default Val<T> orElseConst​(T other)
        Returns a new Val that holds the value held by this Val, or other when this Val is empty.
      • orElse

        default Val<T> orElse​(javafx.beans.value.ObservableValue<T> other)
        Returns a new Val that holds the value held by this Val, or the value held by other when this Val is empty.
      • filter

        default Val<T> filter​(java.util.function.Predicate<? super T> p)
        Returns a new Val that holds the same value as this Val when the value satisfies the predicate and is empty when this Val is empty or its value does not satisfy the given predicate.
      • map

        default <U> Val<U> map​(java.util.function.Function<? super T,​? extends U> f)
        Returns a new Val that holds a mapping of the value held by this Val, and is empty when this Val is empty.
        Parameters:
        f - function to map the value held by this Val.
      • mapDynamic

        default <U> Val<U> mapDynamic​(javafx.beans.value.ObservableValue<? extends java.util.function.Function<? super T,​? extends U>> f)
        Like map(Function), but also allows dynamically changing map function.
      • flatMap

        default <U> Val<U> flatMap​(java.util.function.Function<? super T,​? extends javafx.beans.value.ObservableValue<U>> f)
        Returns a new Val that, when this Val holds value x, holds the value held by f(x), and is empty when this Val is empty.
      • selectVar

        default <U> Var<U> selectVar​(java.util.function.Function<? super T,​? extends javafx.beans.property.Property<U>> f)
        Similar to flatMap(Function), except the returned Val is also a Var. This means you can call setValue() and bind() methods on the returned value, which delegate to the currently selected Property.

        As the value of this Val changes, so does the selected Property. When the Var returned from this method is bound, as the selected Property changes, the previously selected Property is unbound and the newly selected Property is bound.

        Note that if the currently selected Property is null, then calling getValue() on the returned value will return null regardless of any prior call to setValue() or bind().

      • selectVar

        default <U> Var<U> selectVar​(java.util.function.Function<? super T,​? extends javafx.beans.property.Property<U>> f,
                                     U resetToOnUnbind)
      • conditionOn

        default Val<T> conditionOn​(javafx.beans.value.ObservableValue<java.lang.Boolean> condition)
        Returns a new Val that only observes this Val when condition is true. More precisely, the returned Val observes condition whenever it itself has at least one observer and observes this Val whenever it itself has at least one observer and the value of condition is true. When condition is true, the returned Val has the same value as this Val. When condition is false, the returned Val has the value that was held by this Val at the time when condition changed to false.
      • conditionOnShowing

        default Val<T> conditionOnShowing​(javafx.scene.Node node)
        Equivalent to conditionOn(ObservableValue) where the condition is that node is showing: it is part of a scene graph (Node.sceneProperty() is not null), its scene is part of a window (Scene.windowProperty() is not null) and the window is showing (Window.showingProperty() is true).
      • animate

        default Val<T> animate​(java.util.function.BiFunction<? super T,​? super T,​java.time.Duration> duration,
                               Interpolator<T> interpolator)
        Returns a new Val that gradually transitions to the value of this Val every time this Val changes.

        When the returned Val has no observer, there is no gradual transition taking place. This means that there is no animation running in the background that would consume system resources. This also means that in that case ObservableValue.getValue() always returns the target value (i.e. the current value of this Val), instead of any intermediate interpolated value.

        Parameters:
        duration - function that calculates the desired duration of the transition for two boundary values.
        interpolator - calculates the interpolated value between two boundary values, given a fraction.
      • animate

        default Val<T> animate​(java.time.Duration duration,
                               Interpolator<T> interpolator)
        Returns a new Val that gradually transitions to the value of this Val every time this Val changes.

        When the returned Val has no observer, there is no gradual transition taking place. This means that there is no animation running in the background that would consume system resources. This also means that in that case ObservableValue.getValue() always returns the target value (i.e. the current value of this Val), instead of any intermediate interpolated value.

        Parameters:
        duration - the desired duration of the transition
        interpolator - calculates the interpolated value between two boundary values, given a fraction.
      • asVar

        default Var<T> asVar​(java.util.function.Consumer<T> setValue)
        Let's this Val be viewed as a Var, with the given setValue function serving the purpose of WritableValue.setValue(Object).
        See Also:
        Var.fromVal(ObservableValue, Consumer)
      • asList

        default LiveList<T> asList()
        Returns a LiveList view of this Val. The returned list will have size 1 when this Val is present (i.e. not null) and size 0 otherwise.
      • wrap

        static <T> Val<T> wrap​(javafx.beans.value.ObservableValue<T> obs)
        Returns a Val wrapper around ObservableValue. If the argument is already a Val<T>, no wrapping occurs and the argument is returned as is. Note that one rarely needs to use this method, because most of the time one can use the appropriate static method directly to get the desired result. For example, instead of
         
         Val.wrap(obs).orElse(other)
         
         
        one can write
         
         Val.orElse(obs, other)
         
         
        However, an explicit wrapper is necessary if access to observeInvalidations(Consumer), or invalidations() is needed, since there is no direct static method equivalent for them.
      • observeChanges

        static <T> Subscription observeChanges​(javafx.beans.value.ObservableValue<? extends T> obs,
                                               javafx.beans.value.ChangeListener<? super T> listener)
      • observeInvalidations

        static Subscription observeInvalidations​(javafx.beans.value.ObservableValue<?> obs,
                                                 javafx.beans.InvalidationListener listener)
      • orElseConst

        static <T> Val<T> orElseConst​(javafx.beans.value.ObservableValue<? extends T> src,
                                      T other)
      • orElse

        static <T> Val<T> orElse​(javafx.beans.value.ObservableValue<? extends T> src,
                                 javafx.beans.value.ObservableValue<? extends T> other)
      • filter

        static <T> Val<T> filter​(javafx.beans.value.ObservableValue<T> src,
                                 java.util.function.Predicate<? super T> p)
      • map

        static <T,​U> Val<U> map​(javafx.beans.value.ObservableValue<T> src,
                                      java.util.function.Function<? super T,​? extends U> f)
      • mapDynamic

        static <T,​U> Val<U> mapDynamic​(javafx.beans.value.ObservableValue<T> src,
                                             javafx.beans.value.ObservableValue<? extends java.util.function.Function<? super T,​? extends U>> f)
      • flatMap

        static <T,​U> Val<U> flatMap​(javafx.beans.value.ObservableValue<T> src,
                                          java.util.function.Function<? super T,​? extends javafx.beans.value.ObservableValue<U>> f)
      • selectVar

        static <T,​U> Var<U> selectVar​(javafx.beans.value.ObservableValue<T> src,
                                            java.util.function.Function<? super T,​? extends javafx.beans.property.Property<U>> f)
      • selectVar

        static <T,​U> Var<U> selectVar​(javafx.beans.value.ObservableValue<T> src,
                                            java.util.function.Function<? super T,​? extends javafx.beans.property.Property<U>> f,
                                            U resetToOnUnbind)
      • conditionOn

        static <T> Val<T> conditionOn​(javafx.beans.value.ObservableValue<T> obs,
                                      javafx.beans.value.ObservableValue<java.lang.Boolean> condition)
      • conditionOnShowing

        static <T> Val<T> conditionOnShowing​(javafx.beans.value.ObservableValue<T> obs,
                                             javafx.scene.Node node)
      • suspendable

        static <T> SuspendableVal<T> suspendable​(javafx.beans.value.ObservableValue<T> obs)
      • animate

        static <T> Val<T> animate​(javafx.beans.value.ObservableValue<T> obs,
                                  java.util.function.BiFunction<? super T,​? super T,​java.time.Duration> duration,
                                  Interpolator<T> interpolator)
        Creates a new Val that gradually transitions to the value of the given ObservableValue obs every time obs changes.

        When the returned Val has no observer, there is no gradual transition taking place. This means that there is no animation running in the background that would consume system resources. This also means that in that case ObservableValue.getValue() always returns the target value (i.e. the current value of obs), instead of any intermediate interpolated value.

        Parameters:
        obs - observable value to animate
        duration - function that calculates the desired duration of the transition for two boundary values.
        interpolator - calculates the interpolated value between two boundary values, given a fraction.
      • animate

        static <T> Val<T> animate​(javafx.beans.value.ObservableValue<T> obs,
                                  java.time.Duration duration,
                                  Interpolator<T> interpolator)
        Creates a new Val that gradually transitions to the value of the given ObservableValue obs every time obs changes.

        When the returned Val has no observer, there is no gradual transition taking place. This means that there is no animation running in the background that would consume system resources. This also means that in that case ObservableValue.getValue() always returns the target value (i.e. the current value of obs), instead of any intermediate interpolated value.

        Parameters:
        obs - observable value to animate
        duration - the desired duration of the transition
        interpolator - calculates the interpolated value between two boundary values, given a fraction.
      • animate

        static <T extends javafx.animation.Interpolatable<T>> Val<T> animate​(javafx.beans.value.ObservableValue<T> obs,
                                                                             java.util.function.BiFunction<? super T,​? super T,​java.time.Duration> duration)
        Like animate(ObservableValue, BiFunction, Interpolator), but uses the interpolation defined by the Interpolatable type T.
      • animate

        static <T extends javafx.animation.Interpolatable<T>> Val<T> animate​(javafx.beans.value.ObservableValue<T> obs,
                                                                             java.time.Duration duration)
        Like animate(ObservableValue, Duration, Interpolator), but uses the interpolation defined by the Interpolatable type T.
      • combine

        static <A,​B,​R> Val<R> combine​(javafx.beans.value.ObservableValue<A> src1,
                                                  javafx.beans.value.ObservableValue<B> src2,
                                                  java.util.function.BiFunction<? super A,​? super B,​? extends R> f)
      • combine

        static <A,​B,​C,​R> Val<R> combine​(javafx.beans.value.ObservableValue<A> src1,
                                                          javafx.beans.value.ObservableValue<B> src2,
                                                          javafx.beans.value.ObservableValue<C> src3,
                                                          TriFunction<? super A,​? super B,​? super C,​? extends R> f)
      • combine

        static <A,​B,​C,​D,​R> Val<R> combine​(javafx.beans.value.ObservableValue<A> src1,
                                                                  javafx.beans.value.ObservableValue<B> src2,
                                                                  javafx.beans.value.ObservableValue<C> src3,
                                                                  javafx.beans.value.ObservableValue<D> src4,
                                                                  TetraFunction<? super A,​? super B,​? super C,​? super D,​? extends R> f)
      • combine

        static <A,​B,​C,​D,​E,​R> Val<R> combine​(javafx.beans.value.ObservableValue<A> src1,
                                                                          javafx.beans.value.ObservableValue<B> src2,
                                                                          javafx.beans.value.ObservableValue<C> src3,
                                                                          javafx.beans.value.ObservableValue<D> src4,
                                                                          javafx.beans.value.ObservableValue<E> src5,
                                                                          PentaFunction<? super A,​? super B,​? super C,​? super D,​? super E,​? extends R> f)
      • combine

        static <A,​B,​C,​D,​E,​F,​R> Val<R> combine​(javafx.beans.value.ObservableValue<A> src1,
                                                                                  javafx.beans.value.ObservableValue<B> src2,
                                                                                  javafx.beans.value.ObservableValue<C> src3,
                                                                                  javafx.beans.value.ObservableValue<D> src4,
                                                                                  javafx.beans.value.ObservableValue<E> src5,
                                                                                  javafx.beans.value.ObservableValue<F> src6,
                                                                                  HexaFunction<? super A,​? super B,​? super C,​? super D,​? super E,​? super F,​? extends R> f)
      • create

        static <T> Val<T> create​(java.util.function.Supplier<? extends T> computeValue,
                                 javafx.beans.Observable... dependencies)
      • create

        static <T> Val<T> create​(java.util.function.Supplier<? extends T> computeValue,
                                 EventStream<?> invalidations)
      • constant

        static <T> Val<T> constant​(T value)
        Returns a constant Val that holds the given value. The value never changes and no notifications are ever produced.
      • showingProperty

        static Val<java.lang.Boolean> showingProperty​(javafx.scene.Node node)
        Returns a Val whose value is true when node is showing: it is part of a scene graph (Node.sceneProperty() is not null), its scene is part of a window (Scene.windowProperty() is not null) and the window is showing (Window.showingProperty() is true).