Module qtjambi
Package io.qt.core

Class QObject.QLongProperty

java.lang.Object
io.qt.internal.QtJambiObject
io.qt.QtObject
io.qt.core.QUntypedPropertyData
io.qt.core.QLongPropertyData
io.qt.core.QObject.QLongProperty
All Implemented Interfaces:
QtObjectInterface
Enclosing class:
QObject
public class QObject.QLongProperty
extends QLongPropertyData
QLongProperty is primitive-typed version of QProperty<Long>.
See Also:
QObject.QProperty

  • Constructor Details

    • QLongProperty

      public QLongProperty()
      Constructs a long-typed property.

    • QLongProperty

      public QLongProperty​(long initialValue)
      Constructs a long-typed property with the provided initialValue.
      Parameters:
      initialValue -

    • QLongProperty

      public QLongProperty​(QLongPropertyBinding binding)
      Constructs a long-typed property with the provided binding.
      Parameters:
      binding -

    • QLongProperty

      public QLongProperty​(QPropertyBinding<@QtPrimitiveType Long> binding)
      Constructs a long-typed property with the provided binding.
      Parameters:
      binding -

    • QLongProperty

      public QLongProperty​(LongSupplier functor)

      Constructs a long-typed property bound to the provided functor.

      Parameters:
      functor -

  • Method Details

    • value

      @QtUninvokable public long value()
      Returns the value of the property. This may evaluate a binding expression that is tied to this property, before returning the value.
      Returns:
      value

    • setValue

      @QtUninvokable public void setValue​(long newValue)

      Assigns newValue to this property and removes the property's associated binding, if present.

      Parameters:
      newValue -

    • setBinding

      @QtUninvokable public QLongPropertyBinding setBinding​(QLongPropertyBinding newBinding)

      Associates the value of this property with the provided newBinding expression and returns the previously associated binding.

      The first time the property value is read, the binding is evaluated. Whenever a dependency of the binding changes, the binding will be re-evaluated the next time the value of this property is read.

      Parameters:
      newBinding -
      Returns:
      oldBinding

    • setBinding

      @QtUninvokable public QLongPropertyBinding setBinding​(QPropertyBinding<@QtPrimitiveType Long> newBinding)

      Associates the value of this property with the provided newBinding expression and returns the previously associated binding.

      The binding's value type (QUntypedPropertyBinding.valueMetaType()) has to be long, otherwise the property remains unchanged.

      The first time the property value is read, the binding is evaluated. Whenever a dependency of the binding changes, the binding will be re-evaluated the next time the value of this property is read.

      Parameters:
      newBinding -
      Returns:
      oldBinding

    • setBinding

      @QtUninvokable public boolean setBinding​(QUntypedPropertyBinding newBinding)

      Associates the value of this property with the provided newBinding expression.

      The binding's value type (QUntypedPropertyBinding.valueMetaType()) has to be long, otherwise the property remains unchanged and the method returns false.

      The first time the property value is read, the binding is evaluated. Whenever a dependency of the binding changes, the binding will be re-evaluated the next time the value of this property is read.

      Returns true if the type of this property is the same as the type the binding function returns; false otherwise.

      Parameters:
      newBinding -
      Returns:
      true if types match, false otherwise.

    • setBinding

      @QtUninvokable public QLongPropertyBinding setBinding​(LongSupplier functor)

      Associates the value of this property with the provided functor and returns the previously associated binding.

      The first time the property value is read, the binding is evaluated by invoking LongSupplier.getAsLong() of functor. Whenever a dependency of the binding changes, the binding will be re-evaluated the next time the value of this property is read.

      Parameters:
      functor -
      Returns:
      oldBinding

    • hasBinding

      @QtUninvokable public boolean hasBinding()
      Checks if the property has a binding.
      Returns:
      true if the property has a binding, false otherwise.

    • binding

      @QtUninvokable public QLongPropertyBinding binding()
      Returns the binding expression that is associated with this property. A default constructed QLongPropertyBinding will be returned if no such association exists.
      Returns:
      binding

    • takeBinding

      @QtUninvokable public QLongPropertyBinding takeBinding()

      Disassociates the binding expression from this property and returns it.

      After calling this function, the value of the property will only change if you assign a new value to it, or when a new binding is set.

      Returns:
      the removed binding

    • onValueChanged

      @QtUninvokable public QPropertyChangeHandler onValueChanged​(Runnable f)

      Registers the given functor f as a callback that shall be called whenever the value of the property changes.

      The returned property change handler object keeps track of the registration. As long as the change handler is alive i.e. as long as a reference to the QPropertyChangeHandler instance exists, the callback remains installed. When the garbage collection deletes the instance, the callback is de-registered.

      Parameters:
      f -
      Returns:
      property change handler
      See Also:
      QPropertyChangeHandler

    • subscribe

      @QtUninvokable public QPropertyChangeHandler subscribe​(Runnable f)
      Subscribes the given functor f as a callback that is called immediately and whenever the value of the property changes in the future.
      Parameters:
      f -
      Returns:
      property change handler
      See Also:
      QPropertyChangeHandler, onValueChanged(Runnable)