Numeric-TextField

What is it?

The text field is a common JavaFx text field which only allows numbers. It also has a object property for the datatype Number. This property reflects the input. This means that if, for example, ten is typed, the Number property is changed to 10 immediately afterwards. If the entry is incorrect, the text field is automatically reset to its last state.

Give it to me!

Download Jar Here

How can I use it?

There are two different ways to use it.

<GridPane fx:controller="sample.Controller"
          xmlns:fx="http://javafx.com/fxml" alignment="center">
          
    <!-- This NumericTextField converts the input
         into an integer and limits the values from -10 to 10. -->
    <NumericTextField type="INTEGER" maxValue="10" minValue="-10"/>
    
</GridPane>

void foo() {

// This NumericTextField converts the input
// into an integer and limits the values from -10 to 10.
  NumericTextField textField = 
    new NumericTextField(-10,10,NumericTextField.NumericType.INTEGER);

}

You want to validate yourself?

First we need our own validator. Therefore we implement the INumberValidator interface.

new INumberValidator() {
    @Override
    public boolean isValid(String s, double maxValue, double minValue) {
       // some Magic here to validate the given string "s"
        return true;
    }

    @Override
    public Number getNumber(String s) throws NumberFormatException {
       // here also some magic to parse the string s to an number
       return null;
    }
}

There are two different ways to use your own validator.

NumericTextField textField;

void foo_UseTheConstructor() {
   textField = new NumericTextField(-10,10,yourMagicValidator);
}

void foo_UseTheSetMethod() {
   textField.setCurrValidator(yourMagicValidator);
}

Bring me to the fancy stuff!!

Sorry, at the moment there is nothing fancy or special in there :( But you get a little example:

- FXML -
<?import at.ohe.numerictextfield.NumericTextField?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.VBox?>
<VBox fx:controller="sample.Controller"
      xmlns:fx="http://javafx.com/fxml" alignment="center" >
    <NumericTextField fx:id="inpNumber" type="DOUBLE" maxValue="10" minValue="-10"/>
    <Label fx:id="lblNumber"/>
</VBox>

- Controller - 
import at.ohe.numerictextfield.NumericTextField;
import javafx.fxml.FXML;
import javafx.scene.control.Label;

public class Controller {

    @FXML
    private NumericTextField inpNumber;
    @FXML
    private Label lblNumber;

    public void initialize() {
        inpNumber.numberProperty().addListener(((observable, oldValue, newValue) -> {
            lblNumber.setText(newValue.toString());
        }));
    }
}

What's going to happen? If something is entered in the input field, the label displays the corresponding value. If something is entered that cannot be processed, the label retains its value.