Module javafx.base

Class When



  • public class When
    extends Object
    Starting point for a binding that calculates a ternary expression.

    A ternary expression has the basic form new When(cond).then(value1).otherwise(value2);. The expression cond needs to be a ObservableBooleanValue. Based on the value of cond, the binding contains the value of value1 (if cond.getValue() == true) or value2 (if cond.getValue() == false). The values value1 and value2 have to be of the same type. They can be constant values or implementations of ObservableValue.

    Since:
    JavaFX 2.0
    • Constructor Detail

      • When

        public When​(ObservableBooleanValue condition)
        The constructor of When.
        Parameters:
        condition - the condition of the ternary expression
    • Method Detail

      • then

        public When.NumberConditionBuilder then​(double thenValue)
        Defines a constant value of the ternary expression, that is returned if the condition is true.
        Parameters:
        thenValue - the value
        Returns:
        the intermediate result which still requires the otherwise-branch
      • then

        public When.NumberConditionBuilder then​(float thenValue)
        Defines a constant value of the ternary expression, that is returned if the condition is true.
        Parameters:
        thenValue - the value
        Returns:
        the intermediate result which still requires the otherwise-branch
      • then

        public When.NumberConditionBuilder then​(long thenValue)
        Defines a constant value of the ternary expression, that is returned if the condition is true.
        Parameters:
        thenValue - the value
        Returns:
        the intermediate result which still requires the otherwise-branch
      • then

        public When.NumberConditionBuilder then​(int thenValue)
        Defines a constant value of the ternary expression, that is returned if the condition is true.
        Parameters:
        thenValue - the value
        Returns:
        the intermediate result which still requires the otherwise-branch
      • then

        public When.BooleanConditionBuilder then​(boolean thenValue)
        Defines a constant value of the ternary expression, that is returned if the condition is true.
        Parameters:
        thenValue - the value
        Returns:
        the intermediate result which still requires the otherwise-branch
      • then

        public When.StringConditionBuilder then​(String thenValue)
        Defines a constant value of the ternary expression, that is returned if the condition is true.
        Parameters:
        thenValue - the value
        Returns:
        the intermediate result which still requires the otherwise-branch
      • then

        public <T> When.ObjectConditionBuilder<T> then​(ObservableObjectValue<T> thenValue)
        Defines the ObservableObjectValue which value is returned by the ternary expression if the condition is true.
        Type Parameters:
        T - the type of the intermediate result
        Parameters:
        thenValue - the value
        Returns:
        the intermediate result which still requires the otherwise-branch
      • then

        public <T> When.ObjectConditionBuilder<T> then​(T thenValue)
        Defines a constant value of the ternary expression, that is returned if the condition is true.
        Type Parameters:
        T - the type of the intermediate result
        Parameters:
        thenValue - the value
        Returns:
        the intermediate result which still requires the otherwise-branch