Example usage for javax.swing JTextArea addCaretListener

Introduction

In this page you can find the example usage for javax.swing JTextArea addCaretListener.

Prototype

public void addCaretListener(CaretListener listener) 

Source Link

Document

Adds a caret listener for notification of any changes to the caret.

Usage

From source file:Main.java

public static void main(String[] args) {
    String text = "one\ntwo\nthree\nfour\nfive";
    JFrame frame = new JFrame("title");
    JTextArea textArea = new JTextArea(text, 1, 30); // shows only one line
    JScrollPane scrollPane = new JScrollPane(textArea);
    frame.add(scrollPane);// ww w .  ja  va  2s.c om
    frame.pack();
    frame.setVisible(true);

    final JViewport viewport = scrollPane.getViewport();

    textArea.addCaretListener(e -> {
        System.out.println("First : " + viewport.getViewPosition());
        System.out.println("Second: " + viewport.getViewPosition());
    });
    textArea.setCaretPosition(text.length());
}

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From source file:MainClass.java

public static void main(String args[]) throws Exception {
    JFrame frame = new JFrame("Caret Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTextArea textArea = new JTextArea();
    JScrollPane scrollPane = new JScrollPane(textArea);
    frame.add(scrollPane, BorderLayout.CENTER);

    CaretListener listener = new CaretListener() {
        public void caretUpdate(CaretEvent caretEvent) {
            System.out.println("dot:" + caretEvent.getDot());
            System.out.println("mark" + caretEvent.getMark());
        }/*from   ww w .j  av  a  2 s .c  o m*/
    };

    textArea.addCaretListener(listener);

    frame.setSize(250, 150);
    frame.setVisible(true);
}

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From source file:Main.java

public static void main(String args[]) {
    JFrame frame = new JFrame("Caret Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    JTextArea textArea = new JTextArea();
    JScrollPane scrollPane = new JScrollPane(textArea);
    frame.add(scrollPane, BorderLayout.CENTER);

    CaretListener listener = new CaretListener() {
        public void caretUpdate(CaretEvent caretEvent) {
            System.out.println("Dot: " + caretEvent.getDot());
            System.out.println("Mark: " + caretEvent.getMark());
        }/*  w  w w  . j  a  v a  2s.c o m*/
    };

    textArea.addCaretListener(listener);

    frame.setSize(250, 150);
    frame.setVisible(true);
}

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From source file:CaretSample.java

public static void main(String args[]) {
    JFrame frame = new JFrame("Caret Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    Container content = frame.getContentPane();
    JTextArea textArea = new JTextArea();
    JScrollPane scrollPane = new JScrollPane(textArea);
    content.add(scrollPane, BorderLayout.CENTER);

    final JTextField dot = new JTextField();
    dot.setEditable(false);//w w  w.  j  ava  2  s.  c  o  m
    JPanel dotPanel = new JPanel(new BorderLayout());
    dotPanel.add(new JLabel("Dot: "), BorderLayout.WEST);
    dotPanel.add(dot, BorderLayout.CENTER);
    content.add(dotPanel, BorderLayout.NORTH);

    final JTextField mark = new JTextField();
    mark.setEditable(false);
    JPanel markPanel = new JPanel(new BorderLayout());
    markPanel.add(new JLabel("Mark: "), BorderLayout.WEST);
    markPanel.add(mark, BorderLayout.CENTER);
    content.add(markPanel, BorderLayout.SOUTH);

    CaretListener listener = new CaretListener() {
        public void caretUpdate(CaretEvent caretEvent) {
            dot.setText("" + caretEvent.getDot());
            mark.setText("" + caretEvent.getMark());
        }
    };

    textArea.addCaretListener(listener);

    frame.setSize(250, 150);
    frame.setVisible(true);
}

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