How do I get the character under the cursor?

I'll try to find the best approach/strategy for the character under the cursor in a text node that contains multiple characters, and I was wondering if anyone had any idea of how to go about doing this?

Hello. You can get the character at the cursor location in the text field by adding a listener to the caretPosition property:

        final TextField tf1 = new TextField();
        tf1.caretPositionProperty().addListener(new ChangeListener() {
            public void changed(ObservableValue observable, Number oldValue, final Number newValue) {
                if (newValue != null && newValue.intValue() > 0) {

                    System.out.println("The caracter at cursor is --> " + tf1.getText(newValue.intValue() - 1, newValue.intValue()));

                }
            }
        });

Update:

You ask about text, not a text field. I did not pay attention. Sorry about that.
It can be made to the text too.

import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Cursor;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.effect.InnerShadow;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.*;
import javafx.scene.text.Text;
import javafx.stage.Stage;

public class TextFieldSample extends Application {

    @Override
    public void start(Stage primaryStage) {

        EventHandler mouseEntered = new EventHandler() {
            public void handle(MouseEvent event) {
                System.out.println(((Text) event.getSource()).getText());

            }
        };

        Text h = new Text("H");
        h.setOnMouseEntered(mouseEntered);
        Text e = new Text("E");
        e.setOnMouseEntered(mouseEntered);
        Text l1 = new Text("L");
        l1.setOnMouseEntered(mouseEntered);
        Text l2 = new Text("L");
        l2.setOnMouseEntered(mouseEntered);
        Text o = new Text("O");
        o.setOnMouseEntered(mouseEntered);
        HBox hbox = new HBox();
        hbox.getChildren().addAll(h, e, l1, l2, o);

        VBox root = new VBox();
        root.getChildren().addAll(hbox);

        Scene scene = new Scene(root, 300, 250);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    public static void main(String[] args) {
        launch(args);
    }
}

The next version of javafx8 will be a TextFlow to Word RTF.
A TextFlow simplifies processing.

http://download.Java.NET/jdk8/jfxdocs/JavaFX/scene/text/textflow.html

Published by: shakir.gusaroff on March 2, 2013 19:15

Tags: Java

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How do I get the character under the cursor?

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