Module javafx.base

Package javafx.beans.binding

Class When

java.lang.Object

javafx.beans.binding.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

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	When.BooleanConditionBuilder	An intermediate class needed while assembling the ternary expression.
class	When.NumberConditionBuilder	If-then-else expression returning a number.
class	When.ObjectConditionBuilder<T>	An intermediate class needed while assembling the ternary expression.
class	When.StringConditionBuilder	An intermediate class needed while assembling the ternary expression.

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method	Description
When.BooleanConditionBuilder	then(boolean thenValue)	Defines a constant value of the ternary expression, that is returned if the condition is true.
When.NumberConditionBuilder	then(double thenValue)	Defines a constant value of the ternary expression, that is returned if the condition is true.
When.NumberConditionBuilder	then(float thenValue)	Defines a constant value of the ternary expression, that is returned if the condition is true.
When.NumberConditionBuilder	then(int thenValue)	Defines a constant value of the ternary expression, that is returned if the condition is true.
When.NumberConditionBuilder	then(long thenValue)	Defines a constant value of the ternary expression, that is returned if the condition is true.
When.StringConditionBuilder	then(String thenValue)	Defines a constant value of the ternary expression, that is returned if the condition is true.
When.BooleanConditionBuilder	then(ObservableBooleanValue thenValue)	Defines the ObservableBooleanValue which value is returned by the ternary expression if the condition is true.
When.NumberConditionBuilder	then(ObservableNumberValue thenValue)	Defines the ObservableNumberValue which value is returned by the ternary expression if the condition is true.
<T> When.ObjectConditionBuilder<T>	then(ObservableObjectValue<T> thenValue)	Defines the ObservableObjectValue which value is returned by the ternary expression if the condition is true.
When.StringConditionBuilder	then(ObservableStringValue thenValue)	Defines the ObservableStringValue which value is returned by the ternary expression if the condition is true.
<T> When.ObjectConditionBuilder<T>	then(T thenValue)	Defines a constant value of the ternary expression, that is returned if the condition is true.

Methods inherited from class java.lang.Object

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

Constructor Details

When

public When(ObservableBooleanValue condition)

The constructor of When.

Parameters:

condition - the condition of the ternary expression

Method Details

then

public When.NumberConditionBuilder then(ObservableNumberValue thenValue)

Defines the 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.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(ObservableBooleanValue thenValue)

Defines the 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.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(ObservableStringValue thenValue)

Defines the 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 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