Hi again, for this post I decided to demonstrate JAVA’s Swing library.With this library it is easy to create applications with GUI.Anyway I never prefer to write Windows applications in JAVA, however if you need cross-platform stuff, Swing may be a choice.Unlike awt, Swing looks like same in the all platforms. This simple Editor program, uses JMenuBar (Standard Menubar) , JToolBar (Standard Toolbar) , JDesktop (MDI) , Images for buttons , also Editor is capable of inserting images to the text. (StyledDocument).

Here is the source code:

//Simple Editor / Styled Document Editor
//coded by Burak Ozdemir

import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.text.rtf.RTFEditorKit;

public class Editor extends JFrame {
ArrayList Editors;
ArrayList Frames;
JDesktopPane desktop;

// Some required variables to make multiple file handling easy
File selectedfile;

Editor() {

// Initializing variables and creating gui
Editors = new ArrayList();
Frames = new ArrayList();

JFrame frame = new JFrame();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

// Mdi documenting
desktop = new JDesktopPane();

// Create Menu
JMenuBar menuBar = drawMenu();

frame.setJMenuBar(menuBar);

// Create Toolbar
JToolBar toolBar = drawToolBar();

frame.add(toolBar, BorderLayout.PAGE_START);

// Some styling
frame.add(desktop, BorderLayout.CENTER);
frame.setSize(800, 600);
frame.setVisible(true);
frame.setTitle(“Simple Text Editor”);
}

public static void main(String[] args) {

// Running main program
new Editor();
}

// this function is used to save documents
private void saveDocument() {
try {

// Determine the currently active pane
JInternalFrame ifrm = desktop.getSelectedFrame();
int _index = -1;

for (int i = 0; i < Frames.size(); ++i) {
if (Frames.get(i) == ifrm) {
_index = i;
}
}

JTextPane jedp = Editors.get(_index);

// Save file
File myFile = new File(ifrm.getTitle());

System.out.println(ifrm.getTitle());

FileOutputStream fo = new FileOutputStream(myFile);
ObjectOutputStream oos = new ObjectOutputStream(fo);

oos.writeObject(jedp.getStyledDocument());
oos.flush();
oos.close();
} catch (FileNotFoundException e) {
System.out.println(“File not found”);
} catch (IOException e) {
System.out.println(“I/O error”);
}
}

// this function is used to load documents
private void loadDocument() {
JFileChooser fileChooser = new JFileChooser();

fileChooser.setDialogTitle(“Open an existing file”);

int result = fileChooser.showOpenDialog(Editor.this);

if (result == JFileChooser.APPROVE_OPTION) {
selectedfile = fileChooser.getSelectedFile();

try {
JInternalFrame internalFrame = new JInternalFrame(selectedfile.getCanonicalPath(), true, true, true,
true);

desktop.add(internalFrame);
internalFrame.setBounds(desktop.getAllFrames().length * 20 + 5, desktop.getAllFrames().length * 20 + 5,
640, 480);
internalFrame.setVisible(true);

RTFEditorKit rtfEditor = new RTFEditorKit();
JTextPane _resultArea = new JTextPane();

// _resultArea.setText(“Enter more text to see scrollbars”);
JScrollPane scrollingArea = new JScrollPane(_resultArea);

// JScrollPane scrollingArea = new JScrollPane(rtfEditor);

_resultArea.setEditorKit(rtfEditor);
internalFrame.add(scrollingArea);

FileInputStream fi = new FileInputStream(selectedfile);
ObjectInputStream ois = new ObjectInputStream(fi);

_resultArea.setStyledDocument((StyledDocument) ois.readObject());
validate();
ois.close();
Editors.add(_resultArea);
Frames.add(internalFrame);
fi.close();
} catch (FileNotFoundException e) {
System.out.println(“File not found”);
} catch (IOException e) {
System.out.println(“I/O error”);
} catch (Exception e) {
e.printStackTrace();
}
}
} // this function is used to create new/empty document

private void newDocument() {
JFileChooser fileChooser = new JFileChooser();

fileChooser.setDialogTitle(“Create a new file”);

int result = fileChooser.showOpenDialog(Editor.this);

if (result == JFileChooser.APPROVE_OPTION) {
selectedfile = fileChooser.getSelectedFile();

try {
selectedfile.createNewFile();
} catch (IOException e) {
System.out.println(“I/O error”);
}

try {
JInternalFrame internalFrame = new JInternalFrame(selectedfile.getCanonicalPath(), true, true, true,
true);

desktop.add(internalFrame);
internalFrame.setBounds(desktop.getAllFrames().length * 20 + 5, desktop.getAllFrames().length * 20 + 5,
640, 480);
internalFrame.setVisible(true);

RTFEditorKit rtfEditor = new RTFEditorKit();
JTextPane _resultArea = new JTextPane();

// _resultArea.setText(“Enter more text to see scrollbars”);
JScrollPane scrollingArea = new JScrollPane(_resultArea);

// JScrollPane scrollingArea = new JScrollPane(rtfEditor);

_resultArea.setEditorKit(rtfEditor);
internalFrame.add(scrollingArea);

FileInputStream fi = new FileInputStream(selectedfile);

rtfEditor.read(fi, _resultArea.getDocument(), 0);
Editors.add(_resultArea);
Frames.add(internalFrame);
fi.close();
} catch (FileNotFoundException e) {
System.out.println(“File not found”);
} catch (IOException e) {
System.out.println(“I/O error”);
} catch (BadLocationException e) {}
}
}

// Create our toolbar
private JToolBar drawToolBar() {
JToolBar myBar = new JToolBar(“Tool Bar”);

// Our buttons
JButton new_button = new JButton(“New”);

new_button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
newDocument();
}
});
myBar.add(new_button);

JButton open_button = new JButton(“Open”);

open_button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
loadDocument();
}
});
myBar.add(open_button);

JButton save_button = new JButton(“Save”);

save_button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
saveDocument();
}
});
myBar.add(save_button);

JButton copy_button = new JButton(“Copy”);

copy_button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
JInternalFrame ifrm = desktop.getSelectedFrame();
int _index = -1;

for (int i = 0; i < Frames.size(); ++i) {
if (Frames.get(i) == ifrm) {
_index = i;
}
}

JTextPane jedp = Editors.get(_index);

jedp.copy();
}
});
myBar.add(copy_button);

JButton paste_button = new JButton(“Paste”);

paste_button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
JInternalFrame ifrm = desktop.getSelectedFrame();
int _index = -1;

for (int i = 0; i < Frames.size(); ++i) {
if (Frames.get(i) == ifrm) {
_index = i;
}
}

JTextPane jedp = Editors.get(_index);

jedp.paste();
}
});
myBar.add(paste_button);

JButton fontitalic_button = new JButton(“Italic”);

fontitalic_button.addActionListener(new StyledEditorKit.ItalicAction());
myBar.add(fontitalic_button);

JButton fontbold_button = new JButton(“Bold”);

fontbold_button.addActionListener(new StyledEditorKit.BoldAction());
myBar.add(fontbold_button);

JButton color_button = new JButton(“Color”);

color_button.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Color color = JColorChooser.showDialog(Editor.this, “Color Chooser”, Color.cyan);

if (color != null) {
MutableAttributeSet attr = new SimpleAttributeSet();

StyleConstants.setForeground(attr, color);

JInternalFrame ifrm = desktop.getSelectedFrame();
int _index = -1;

for (int i = 0; i < Frames.size(); ++i) {
if (Frames.get(i) == ifrm) {
_index = i;
}
}

JTextPane jedp = Editors.get(_index);

jedp.setCharacterAttributes(attr, false);
}
}
});
myBar.add(color_button);

return myBar;
}
// Our menu bar
private JMenuBar drawMenu() {

// Create the menu bar
JMenuBar menuBar = new JMenuBar();

// Create a menu
JMenu file = new JMenu(“File”);
JMenu edit = new JMenu(“Edit”);
JMenu insert = new JMenu(“Insert”);
JMenu format = new JMenu(“Format”);
JMenu view = new JMenu(“View”);
JMenu fontsize = new JMenu(“Size”);
JMenu fontface = new JMenu(“Font Face”);
JMenu fontstyle = new JMenu(“Font Style”);

menuBar.add(file);
menuBar.add(edit);
menuBar.add(insert);
menuBar.add(format);
menuBar.add(view);

JMenuItem _new = new JMenuItem(“New…”);

_new.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
newDocument();
}
});

JMenuItem _open = new JMenuItem(“Open…”);

_open.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
loadDocument();
}
});

JMenuItem _save = new JMenuItem(“Save…”);

_save.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
saveDocument();
}
});

JMenuItem _exit = new JMenuItem(“Exit”);

_exit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
System.exit(0);
}
});
file.add(_new);
file.add(_open);
file.add(_save);
file.add(_exit);

JMenuItem _copy = new JMenuItem(“Copy”);

_copy.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
JInternalFrame ifrm = desktop.getSelectedFrame();
int _index = -1;

for (int i = 0; i < Frames.size(); ++i) {
if (Frames.get(i) == ifrm) {
_index = i;
}
}

JTextPane jedp = Editors.get(_index);

jedp.copy();
}
});

JMenuItem _paste = new JMenuItem(“Paste”);

_paste.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
JInternalFrame ifrm = desktop.getSelectedFrame();
int _index = -1;

for (int i = 0; i < Frames.size(); ++i) {
if (Frames.get(i) == ifrm) {
_index = i;
}
}

JTextPane jedp = Editors.get(_index);

jedp.paste();
}
});
edit.add(_copy);
edit.add(_paste);

JMenuItem _picture = new JMenuItem(“Picture”);

_picture.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent event) {
JFileChooser fileChooser = new JFileChooser();

fileChooser.setDialogTitle(“Select an image file”);

int result = fileChooser.showOpenDialog(Editor.this);

if (result == JFileChooser.APPROVE_OPTION) {
selectedfile = fileChooser.getSelectedFile();

ImageIcon _img = new ImageIcon(selectedfile.getAbsolutePath());
JInternalFrame ifrm = desktop.getSelectedFrame();
int _index = -1;

for (int i = 0; i < Frames.size(); ++i) {
if (Frames.get(i) == ifrm) {
_index = i;
}
}

JTextPane jedp = Editors.get(_index);

jedp.insertIcon(_img);
}
}
});
insert.add(_picture);

// Font Sizes
JMenuItem _size_12 = new JMenuItem(“12″);

_size_12.addActionListener(new StyledEditorKit.FontSizeAction(“font-size-12″, 12));

JMenuItem _size_14 = new JMenuItem(“14″);

_size_14.addActionListener(new StyledEditorKit.FontSizeAction(“font-size-14″, 14));
fontsize.add(_size_12);
fontsize.add(_size_14);
format.add(fontsize);

// Font Families
JMenuItem _sans = new JMenuItem(“SansSerif”);

_sans.addActionListener(new StyledEditorKit.FontFamilyAction(“font-family-Serif”, “Serif”));

JMenuItem _mono = new JMenuItem(“Monospaced”);

_mono.addActionListener(new StyledEditorKit.FontFamilyAction(“font-family-Monospaced”, “Monospaced”));
fontface.add(_sans);
fontface.add(_mono);
format.add(new JSeparator());
format.add(fontface);

// Font Styles
JMenuItem _bold = new JMenuItem(“Bold”);

_bold.addActionListener(new StyledEditorKit.BoldAction());

JMenuItem _italic = new JMenuItem(“Italic”);

_italic.addActionListener(new StyledEditorKit.ItalicAction());

JMenuItem _underlined = new JMenuItem(“Underlined”);

_underlined.addActionListener(new StyledEditorKit.UnderlineAction());
fontstyle.add(_bold);
fontstyle.add(_italic);
fontstyle.add(_underlined);
format.add(new JSeparator());
format.add(fontstyle);

// Font Color
JMenuItem _color = new JMenuItem(“Color”);

_color.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Color color = JColorChooser.showDialog(Editor.this, “Color Chooser”, Color.cyan);

if (color != null) {
MutableAttributeSet attr = new SimpleAttributeSet();

StyleConstants.setForeground(attr, color);

JInternalFrame ifrm = desktop.getSelectedFrame();
int _index = -1;

for (int i = 0; i < Frames.size(); ++i) {
if (Frames.get(i) == ifrm) {
_index = i;
}
}

JTextPane jedp = Editors.get(_index);

jedp.setCharacterAttributes(attr, false);
}
}
});
format.add(new JSeparator());
format.add(_color);

// Change window style to Motif
JMenuItem _windows = new JMenuItem(“Windows”);

_windows.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
UIManager.setLookAndFeel(“com.sun.java.swing.plaf.motif.MotifLookAndFeel”);
} catch (Exception ex) {
System.out.println(“Error changing style to Motif: ” + ex);
}
}
});
view.add(_windows);

return menuBar;
}
}

Technorati Tags: Java, Swing, Editor, Programming, JMenuBar, JToolBar, JDesktop

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