Comment forcer le curseur à être devant un suffixe ?

Bonjour,

En JavaFx, j'applique un TextFormatter sur un TextField pour forcer le curseur à être avant un suffixe (je cherche à créer un champ "degré", donc le suffixe est °).

Quand je lance mon application et que je clique sur le TextField, J'ai ce qui suit:
Pièce jointe 617127

Je voudrais le curseur avant °, comme ça:
Pièce jointe 617128

Voici mon code:
HelloApplication.java:

Code:

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package com.example.demo;
 
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;
 
import java.io.IOException;
 
public class HelloApplication extends Application {
    @Override
    public void start(Stage stage) throws IOException {
        FXMLLoader fxmlLoader = new FXMLLoader(HelloApplication.class.getResource("hello-view.fxml"));
        Scene scene = new Scene(fxmlLoader.load(), 320, 240);
        stage.setTitle("Hello!");
        stage.setScene(scene);
        stage.show();
    }
 
    public static void main(String[] args) {
        launch();
    }
}

HelloController.java:

Code:

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package com.example.demo;
 
import javafx.fxml.FXML;
import javafx.scene.control.TextField;
import javafx.scene.control.TextFormatter;
 
public class HelloController {
    @FXML
    private TextField input;
 
    @FXML
    private void initialize() {
        input.setText("°");
        input.setTextFormatter(getSuffix("°"));
    }
 
    public TextFormatter<String> getSuffix(String suffix) {
        return new TextFormatter<>(pChange -> {
            int maxPos = pChange.getControlText().length() - suffix.length();
            if (pChange.isContentChange()) {
                pChange.setRange(Math.min(pChange.getRangeStart(), maxPos), Math.min(pChange.getRangeEnd(), maxPos));
            } else {
                pChange.setCaretPosition(Math.min(pChange.getCaretPosition(), maxPos));
                pChange.setAnchor(Math.min(pChange.getAnchor(), maxPos));
            }
            return pChange;
        });
    }
}

hello-view.fxml:

Code:

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<?xml version="1.0" encoding="UTF-8"?>
 
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.VBox?>
 
<VBox alignment="CENTER" spacing="20.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/null" fx:controller="com.example.demo.HelloController">
    <padding>
        <Insets bottom="20.0" left="20.0" right="20.0" top="20.0" />
    </padding>
   <children>
      <TextField fx:id="input" />
   </children>
</VBox>

Avez-vous une solution ?

Merci

package test.forcecaret; import javafx.application.Application; import javafx.scene.Scene; import javafx.scene.control.TextField; import javafx.scene.control.TextFormatter; import javafx.scene.layout.StackPane; import javafx.stage.Stage; import javafx.util.StringConverter; import java.util.Optional; public final class Main extends Application { @Override public void start(final Stage stage) throws Exception { final var suffix = "°"; final var pattern = "^[-\\+]?\\d*.?\\d*°$"; final var temperatureConverter = new StringConverter<Double>() { @Override public String toString(final Double value) { System.out.println("toString(%f)".formatted(value)); var result = Optional.ofNullable(value) .map(v -> Double.toString(v)) .orElse("0"); result += suffix; System.out.println("-> \"%s\"".formatted(result)); return result; } @Override public Double fromString(String text) { System.out.println("fromString(\"%s\")".formatted(text)); var value = text.strip(); final int suffixIndex = text.lastIndexOf(suffix); if (suffixIndex >= 0) { value = text.substring(0, suffixIndex); } final double result = Double.parseDouble(value); System.out.println("-> %f".formatted(result)); return result; } }; final var temperatureFormatter = new TextFormatter<Double>(temperatureConverter); final var textField = new TextField(); textField.setMaxWidth(500); textField.setText(suffix); textField.setTextFormatter(temperatureFormatter); temperatureFormatter.valueProperty().addListener((observable, oldValue, newValue) -> { System.out.println("Value changed from \"%f\" to \"%f\"".formatted(oldValue, newValue)); final var text = textField.getText(); final int suffixIndex = text.lastIndexOf(suffix); if (suffixIndex >= 0) { textField.positionCaret(text.lastIndexOf(suffix)); } }); final var root = new StackPane(); root.getChildren().setAll(textField); final var scene = new Scene(root); stage.setWidth(800); stage.setHeight(600); stage.setScene(scene); stage.show(); stage.setTitle("Test"); } }