Example usage for javax.swing.text Segment Segment

Introduction

In this page you can find the example usage for javax.swing.text Segment Segment.

Prototype

public Segment(char[] array, int offset, int count) 

Source Link

Document

Creates a new segment referring to an existing array.

Usage

From source file:Main.java

public Main() {
    textArea.getDocument().addDocumentListener(new DocumentListener() {

        @Override//from  ww w. j a v a  2  s .  c  om
        public void changedUpdate(DocumentEvent e) {
            update(e);
        }

        @Override
        public void insertUpdate(DocumentEvent e) {
            update(e);
        }

        @Override
        public void removeUpdate(DocumentEvent e) {
            update(e);
        }

        private void update(DocumentEvent e) {
            List<String> lines = getLines(textArea);
            String lastLine = lines.get(lines.size() - 1);
            int tabbedTextWidth = Utilities.getTabbedTextWidth(
                    new Segment(lastLine.toCharArray(), 0, lastLine.length()),
                    textArea.getFontMetrics(textArea.getFont()), 0, null, 0);
            int lineHeight = getLineHeight(textArea);
            if (lines.size() * lineHeight > textArea.getHeight() || tabbedTextWidth > textArea.getWidth()) {
                System.out.println("Too many lines!");
            }
        }
    });

    getContentPane().add(textArea);
}

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