Membuat Document Model menggunakan StyleDocument dan JTextPane

Membuat Document Model menggunakan StyleDocument dan JTextPane
Ini adalah contoh yang sangat baik pemisahan data dari representasi visual.
Dalam komponen JTextPane, saya menggunakan StyledDocument untuk menetapkan gaya data teks.


import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.JToolBar;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;

public class DocumentModel extends JFrame {

    private StyledDocument doc;
    private JTextPane textpane;

    public DocumentModel() {

        setTitle("Document Model");

        JToolBar toolbar = new JToolBar();

        ImageIcon bold = new ImageIcon("bold.png");
        ImageIcon italic = new ImageIcon("italic.png");
        ImageIcon strike = new ImageIcon("strike.png");
        ImageIcon underline = new ImageIcon("underline.png");

        JButton boldb = new JButton(bold);
        JButton italb = new JButton(italic);
        JButton strib = new JButton(strike);
        JButton undeb = new JButton(underline);

        toolbar.add(boldb);
        toolbar.add(italb);
        toolbar.add(strib);
        toolbar.add(undeb);

        add(toolbar, BorderLayout.NORTH);

        JPanel panel = new JPanel();
        panel.setLayout(new BorderLayout());
        panel.setBorder(BorderFactory.createEmptyBorder(20, 20, 20, 20));

        JScrollPane pane = new JScrollPane();
        textpane = new JTextPane(); 
        textpane.setBorder(BorderFactory.createEmptyBorder(8, 8, 8, 8));

        doc = textpane.getStyledDocument();

        Style style = textpane.addStyle("Bold", null);
        StyleConstants.setBold(style, true);

        style = textpane.addStyle("Italic", null);
        StyleConstants.setItalic(style, true);

        style = textpane.addStyle("Underline", null);
        StyleConstants.setUnderline(style, true);

        style = textpane.addStyle("Strike", null);
        StyleConstants.setStrikeThrough(style, true);

        boldb.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                doc.setCharacterAttributes(textpane.getSelectionStart(), 
                    textpane.getSelectionEnd() - textpane.getSelectionStart(),
                    textpane.getStyle("Bold"), false);
            }
        });

        italb.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                doc.setCharacterAttributes(textpane.getSelectionStart(), 
                    textpane.getSelectionEnd() - textpane.getSelectionStart(),
                    textpane.getStyle("Italic"), false);
            }

        });

        strib.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                doc.setCharacterAttributes(textpane.getSelectionStart(), 
                    textpane.getSelectionEnd() - textpane.getSelectionStart(),
                    textpane.getStyle("Strike"), false);
            }

        });

        undeb.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                doc.setCharacterAttributes(textpane.getSelectionStart(), 
                    textpane.getSelectionEnd() - textpane.getSelectionStart(),
                    textpane.getStyle("Underline"), false);
            }
        });

        pane.getViewport().add(textpane);
        panel.add(pane);

        add(panel);

        setSize(new Dimension(380, 320));
        setLocationRelativeTo(null);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setVisible(true);
    }

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

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