Mega Code Archive
Editor based on JTextPane
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import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GraphicsEnvironment;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.Action;
import javax.swing.JButton;
import javax.swing.JColorChooser;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextPane;
import javax.swing.text.AttributeSet;
import javax.swing.text.Element;
import javax.swing.text.MutableAttributeSet;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyledDocument;
import javax.swing.text.StyledEditorKit;
public class MainClass {
public MainClass() {
JFrame frame = new JFrame();
JTextPane textPane = new JTextPane();
JScrollPane scrollPane = new JScrollPane(textPane);
JPanel north = new JPanel();
JMenuBar menu = new JMenuBar();
JMenu styleMenu = new JMenu();
styleMenu.setText("Style");
Action boldAction = new BoldAction();
boldAction.putValue(Action.NAME, "Bold");
styleMenu.add(boldAction);
Action italicAction = new ItalicAction();
italicAction.putValue(Action.NAME, "Italic");
styleMenu.add(italicAction);
Action foregroundAction = new ForegroundAction();
foregroundAction.putValue(Action.NAME, "Color");
styleMenu.add(foregroundAction);
Action formatTextAction = new FontAndSizeAction();
formatTextAction.putValue(Action.NAME, "Font and Size");
styleMenu.add(formatTextAction);
menu.add(styleMenu);
north.add(menu);
frame.getContentPane().setLayout(new BorderLayout());
frame.getContentPane().add(north, BorderLayout.NORTH);
frame.getContentPane().add(scrollPane, BorderLayout.CENTER);
frame.setSize(800, 500);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public static void main(String[] args) {
new MainClass();
}
}
class BoldAction extends StyledEditorKit.StyledTextAction {
private static final long serialVersionUID = 9174670038684056758L;
public BoldAction() {
super("font-bold");
}
public String toString() {
return "Bold";
}
public void actionPerformed(ActionEvent e) {
JEditorPane editor = getEditor(e);
if (editor != null) {
StyledEditorKit kit = getStyledEditorKit(editor);
MutableAttributeSet attr = kit.getInputAttributes();
boolean bold = (StyleConstants.isBold(attr)) ? false : true;
SimpleAttributeSet sas = new SimpleAttributeSet();
StyleConstants.setBold(sas, bold);
setCharacterAttributes(editor, sas, false);
}
}
}
class ItalicAction extends StyledEditorKit.StyledTextAction {
private static final long serialVersionUID = -1428340091100055456L;
public ItalicAction() {
super("font-italic");
}
public String toString() {
return "Italic";
}
public void actionPerformed(ActionEvent e) {
JEditorPane editor = getEditor(e);
if (editor != null) {
StyledEditorKit kit = getStyledEditorKit(editor);
MutableAttributeSet attr = kit.getInputAttributes();
boolean italic = (StyleConstants.isItalic(attr)) ? false : true;
SimpleAttributeSet sas = new SimpleAttributeSet();
StyleConstants.setItalic(sas, italic);
setCharacterAttributes(editor, sas, false);
}
}
}
class ForegroundAction extends StyledEditorKit.StyledTextAction {
private static final long serialVersionUID = 6384632651737400352L;
JColorChooser colorChooser = new JColorChooser();
JDialog dialog = new JDialog();
boolean noChange = false;
boolean cancelled = false;
public ForegroundAction() {
super("foreground");
}
public void actionPerformed(ActionEvent e) {
JTextPane editor = (JTextPane) getEditor(e);
if (editor == null) {
JOptionPane.showMessageDialog(null,
"You need to select the editor pane before you can change the color.", "Error",
JOptionPane.ERROR_MESSAGE);
return;
}
int p0 = editor.getSelectionStart();
StyledDocument doc = getStyledDocument(editor);
Element paragraph = doc.getCharacterElement(p0);
AttributeSet as = paragraph.getAttributes();
fg = StyleConstants.getForeground(as);
if (fg == null) {
fg = Color.BLACK;
}
colorChooser.setColor(fg);
JButton accept = new JButton("OK");
accept.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
fg = colorChooser.getColor();
dialog.dispose();
}
});
JButton cancel = new JButton("Cancel");
cancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
cancelled = true;
dialog.dispose();
}
});
JButton none = new JButton("None");
none.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
noChange = true;
dialog.dispose();
}
});
JPanel buttons = new JPanel();
buttons.add(accept);
buttons.add(none);
buttons.add(cancel);
dialog.getContentPane().setLayout(new BorderLayout());
dialog.getContentPane().add(colorChooser, BorderLayout.CENTER);
dialog.getContentPane().add(buttons, BorderLayout.SOUTH);
dialog.setModal(true);
dialog.pack();
dialog.setVisible(true);
if (!cancelled) {
MutableAttributeSet attr = null;
if (editor != null) {
if (fg != null && !noChange) {
attr = new SimpleAttributeSet();
StyleConstants.setForeground(attr, fg);
setCharacterAttributes(editor, attr, false);
}
}
}// end if color != null
noChange = false;
cancelled = false;
}
private Color fg;
}
class FontAndSizeAction extends StyledEditorKit.StyledTextAction {
private static final long serialVersionUID = 584531387732416339L;
private String family;
private float fontSize;
JDialog formatText;
private boolean accept = false;
JComboBox fontFamilyChooser;
JComboBox fontSizeChooser;
public FontAndSizeAction() {
super("Font and Size");
}
public String toString() {
return "Font and Size";
}
public void actionPerformed(ActionEvent e) {
JTextPane editor = (JTextPane) getEditor(e);
int p0 = editor.getSelectionStart();
StyledDocument doc = getStyledDocument(editor);
Element paragraph = doc.getCharacterElement(p0);
AttributeSet as = paragraph.getAttributes();
family = StyleConstants.getFontFamily(as);
fontSize = StyleConstants.getFontSize(as);
formatText = new JDialog(new JFrame(), "Font and Size", true);
formatText.getContentPane().setLayout(new BorderLayout());
JPanel choosers = new JPanel();
choosers.setLayout(new GridLayout(2, 1));
JPanel fontFamilyPanel = new JPanel();
fontFamilyPanel.add(new JLabel("Font"));
GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
String[] fontNames = ge.getAvailableFontFamilyNames();
fontFamilyChooser = new JComboBox();
for (int i = 0; i < fontNames.length; i++) {
fontFamilyChooser.addItem(fontNames[i]);
}
fontFamilyChooser.setSelectedItem(family);
fontFamilyPanel.add(fontFamilyChooser);
choosers.add(fontFamilyPanel);
JPanel fontSizePanel = new JPanel();
fontSizePanel.add(new JLabel("Size"));
fontSizeChooser = new JComboBox();
fontSizeChooser.setEditable(true);
fontSizeChooser.addItem(new Float(4));
fontSizeChooser.addItem(new Float(8));
fontSizeChooser.addItem(new Float(12));
fontSizeChooser.addItem(new Float(16));
fontSizeChooser.addItem(new Float(20));
fontSizeChooser.addItem(new Float(24));
fontSizeChooser.setSelectedItem(new Float(fontSize));
fontSizePanel.add(fontSizeChooser);
choosers.add(fontSizePanel);
JButton ok = new JButton("OK");
ok.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
accept = true;
formatText.dispose();
family = (String) fontFamilyChooser.getSelectedItem();
fontSize = Float.parseFloat(fontSizeChooser.getSelectedItem().toString());
}
});
JButton cancel = new JButton("Cancel");
cancel.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
formatText.dispose();
}
});
JPanel buttons = new JPanel();
buttons.add(ok);
buttons.add(cancel);
formatText.getContentPane().add(choosers, BorderLayout.CENTER);
formatText.getContentPane().add(buttons, BorderLayout.SOUTH);
formatText.pack();
formatText.setVisible(true);
MutableAttributeSet attr = null;
if (editor != null && accept) {
attr = new SimpleAttributeSet();
StyleConstants.setFontFamily(attr, family);
StyleConstants.setFontSize(attr, (int) fontSize);
setCharacterAttributes(editor, attr, false);
}
}
}
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