javafx.beans.binding

Class When

java.lang.Object

javafx.beans.binding.When

public class When
extends java.lang.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 javafx.beans.value.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 javafx.beans.value.ObservableValue.

Since:

JavaFX 2.0

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private class	When.BooleanCondition If-then-else expression returning Boolean.
class	When.BooleanConditionBuilder An intermediate class needed while assembling the ternary expression.
class	When.NumberConditionBuilder If-then-else expression returning a number.
private class	When.ObjectCondition<T> If-then-else expression returning general objects.
class	When.ObjectConditionBuilder<T> An intermediate class needed while assembling the ternary expression.
private class	When.StringCondition If-then-else expression returning String.
class	When.StringConditionBuilder An intermediate class needed while assembling the ternary expression.
private static class	When.WhenListener

Field Summary

Fields

Modifier and Type	Field and Description
private ObservableBooleanValue	condition

Constructor Summary

Constructors

Constructor and Description
When(ObservableBooleanValue condition) The constructor of When.

Method Summary

Modifier and Type	Method and Description
private static NumberBinding	createNumberCondition(ObservableBooleanValue condition, ObservableNumberValue thenValue, ObservableNumberValue otherwiseValue)
<T> When.ObjectConditionBuilder<T>	then(<any> thenValue) Defines the javafx.beans.value.ObservableObjectValue which value is returned by the ternary expression if the condition is true.
When.BooleanConditionBuilder	then(ObservableBooleanValue thenValue) Defines the javafx.beans.value.ObservableBooleanValue which value is returned by the ternary expression if the condition is true.
When.NumberConditionBuilder	then(ObservableNumberValue thenValue) Defines the javafx.beans.value.ObservableNumberValue which value is returned by the ternary expression if the condition is true.
When.StringConditionBuilder	then(ObservableStringValue thenValue) Defines the javafx.beans.value.ObservableStringValue which value is returned by the ternary expression if the condition is true.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

condition

private final ObservableBooleanValue condition

Constructor Detail

When

public When(ObservableBooleanValue condition)

The constructor of When.

Parameters:

condition - the condition of the ternary expression

Method Detail

createNumberCondition

private static NumberBinding createNumberCondition(ObservableBooleanValue condition,
                                                   ObservableNumberValue thenValue,
                                                   ObservableNumberValue otherwiseValue)

then

public When.NumberConditionBuilder then(ObservableNumberValue thenValue)

Defines the javafx.beans.value.ObservableNumberValue which value is returned by the ternary expression if the condition is true.

Parameters:

thenValue - the value

Returns:

the intermediate result which still requires the otherwise-branch

then

public When.BooleanConditionBuilder then(ObservableBooleanValue thenValue)

Defines the javafx.beans.value.ObservableBooleanValue which value is returned by the ternary expression if the condition is true.

Parameters:

thenValue - the value

Returns:

the intermediate result which still requires the otherwise-branch

then

public When.StringConditionBuilder then(ObservableStringValue thenValue)

Defines the javafx.beans.value.ObservableStringValue which value is returned by the ternary expression 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(<any> thenValue)

Defines the javafx.beans.value.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