Class TextFormatter<V>

java.lang.Object

javafx.scene.control.TextFormatter<V>

Type Parameters:: V - The type of the value

public class TextFormatter<V> extends Object

A Formatter describes a format of a TextInputControl text by using two distinct mechanisms:

A filter (getFilter()) that can intercept and modify user input. This helps to keep the text in the desired format. A default text supplier can be used to provide the initial text.
A value converter (getValueConverter()) and value (valueProperty()) can be used to provide special format that represents a value of type V. If the control is editable and the text is changed by the user, the value is then updated to correspond to the text.

It's possible to have a formatter with just a filter or a value converter. If a value converter is not provided, setting a value will result in an IllegalStateException and the value is always null.

Since Formatter contains a value that represents the state of the TextInputControl to which it is currently assigned, a single Formatter instance can be used only in one TextInputControl at a time.

Since:: JavaFX 8u40

Nested Class Summary

Modifier and Type	Class	Description
`static final class`	`TextFormatter.Change`	Contains the state representing a change in the content or selection for a TextInputControl.

Property Summary

Type	Property	Description
`final ObjectProperty<V>`	`value`	The current value for this formatter.

Field Summary

Modifier and Type	Field	Description
`static final StringConverter<String>`	`IDENTITY_STRING_CONVERTER`	This string converter converts the text to the same String value.

Constructor Summary

Constructor	Description
`TextFormatter(UnaryOperator<TextFormatter.Change> filter)`	Creates a new Formatter with the provided filter.
`TextFormatter(StringConverter<V> valueConverter)`	Creates a new Formatter with the provided value converter.
`TextFormatter(StringConverter<V> valueConverter, V defaultValue)`	Creates a new Formatter with the provided value converter and default value.
`TextFormatter(StringConverter<V> valueConverter, V defaultValue, UnaryOperator<TextFormatter.Change> filter)`	Creates a new Formatter with the provided filter, value converter and default value.

Method Summary

Modifier and Type	Method	Description
`final UnaryOperator<TextFormatter.Change>`	`getFilter()`	Filter allows user to intercept and modify any change done to the text content.
`final V`	`getValue()`	Gets the value of the `value` property.
`final StringConverter<V>`	`getValueConverter()`	The converter between the values and text.
`final void`	`setValue(V value)`	Sets the value of the `value` property.
`final ObjectProperty<V>`	`valueProperty()`	The current value for this formatter.

Methods declared in class java.lang.Object

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

Property Details

value

public final ObjectProperty<V> valueProperty

The current value for this formatter. When the formatter is set on a TextInputControl and has a valueConverter, the value is set by the control, when the text is committed.

See Also:

Field Details

IDENTITY_STRING_CONVERTER

public static final StringConverter<String> IDENTITY_STRING_CONVERTER

This string converter converts the text to the same String value. This might be useful for cases where you want to manipulate with the text through the value or you need to provide a default text value.

Constructor Details

TextFormatter

public TextFormatter(UnaryOperator<TextFormatter.Change> filter)

Creates a new Formatter with the provided filter.

Parameters:: filter - The filter to use in this formatter or null

TextFormatter

public TextFormatter(StringConverter<V> valueConverter, V defaultValue, UnaryOperator<TextFormatter.Change> filter)

Creates a new Formatter with the provided filter, value converter and default value.

Parameters:: valueConverter - The value converter to use in this formatter or null.; defaultValue - the default value.; filter - The filter to use in this formatter or null

TextFormatter

public TextFormatter(StringConverter<V> valueConverter, V defaultValue)

Creates a new Formatter with the provided value converter and default value.

Parameters:: valueConverter - The value converter to use in this formatter. This must not be null.; defaultValue - the default value

TextFormatter

public TextFormatter(StringConverter<V> valueConverter)

Creates a new Formatter with the provided value converter. The default value will be null.

Parameters:: valueConverter - The value converter to use in this formatter. This must not be null.

Method Details

getValueConverter

public final StringConverter<V> getValueConverter()

The converter between the values and text. It maintains a "binding" between the TextInputControl.textProperty() } and valueProperty() }. The value is updated when the control loses it's focus or it is committed (TextField only). Setting the value will update the text of the control, using the provided converter. If it's impossible to convert text to value, an exception should be thrown.

Returns:

StringConverter for values or null if none provided

See Also:

getFilter

public final UnaryOperator<TextFormatter.Change> getFilter()

Filter allows user to intercept and modify any change done to the text content.

The filter itself is an UnaryOperator that accepts TextFormatter.Change object. It should return a TextFormatter.Change object that contains the actual (filtered) change. Returning null rejects the change.

Returns:: the filter for this formatter or null if there is none

valueProperty

public final ObjectProperty<V> valueProperty()

The current value for this formatter. When the formatter is set on a TextInputControl and has a valueConverter, the value is set by the control, when the text is committed.

Returns:

the value property

See Also:

setValue

public final void setValue(V value)

Sets the value of the value property.

Property description:

The current value for this formatter. When the formatter is set on a TextInputControl and has a valueConverter, the value is set by the control, when the text is committed.

Parameters:

value - the value for the value property

See Also:

getValue

public final V getValue()

Gets the value of the value property.

Property description:

The current value for this formatter. When the formatter is set on a TextInputControl and has a valueConverter, the value is set by the control, when the text is committed.

Returns:

the value of the value property

See Also:

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Documentation extracted from JavaFX API Documentation.
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