A Java Swing frame window
Code: "gui_DocWindow.py"
Programming language: Python
DMelt Version 1. Last modified: 05/25/2016. License: Free
http://jwork.org/dmelt/code/cache/gui_DocWindow_4007.py
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import java
from java.awt import BorderLayout, Event

from javax.swing import AbstractAction,JMenuBar,JMenu
from javax.swing import JMenuItem,JButton,JFrame, JTextArea,JToolBar,KeyStroke


class CallbackAction(AbstractAction):
     ''' Action that calls a callback method '''
     def __init__(self, name, desc, callback):
         AbstractAction.__init__(self)
         self.putValue(self.NAME, name)
         self.putValue(self.SHORT_DESCRIPTION, desc)
         self.callback = callback

     def actionPerformed(self, event):
         self.callback()


class DocWindow(JFrame):
     ''' A top-level view that displays a course document (Learning Object) '''

     def __init__(self):
         JFrame.__init__(self, 'Swing Demo', windowClosing=self.exit)
         self.setBounds(200, 200, 200, 200)
         self.makeUI()


     def makeUI(self):
         # Toolbar at the top
         toolBar = self.makeToolBarAndMenus()
         self.getContentPane().add(toolBar, BorderLayout.NORTH)

         self.infoPanel = JTextArea()
         self.getContentPane().add(self.infoPanel, BorderLayout.CENTER)


     def makeToolBarAndMenus(self):
         ''' Create the toolbar and menus. They are created together because
             they share many actions. Creation is in the order of the 
toolbar. '''
         menuBar = JMenuBar()
         self.setJMenuBar(menuBar)

         # File menu
         fileMenu = JMenu('File')
         fileMenu.setMnemonic('f')
         menuBar.add(fileMenu)

         toolBar = JToolBar()

         # Actions - These are in the order that they appear in the toolbar
         newAction = CallbackAction('New', 'Create a new file', self.new)
         self.addAction(newAction, 'N', 'N', toolBar, fileMenu)

         openAction = CallbackAction('Open...', 'Open a file', self.open)
         self.addAction(openAction, 'O', 'O', toolBar, fileMenu)

         self.saveAction = CallbackAction('Save', 'Save a file', self.save)
         self.addAction(self.saveAction, 'S', 'S', toolBar, fileMenu)

         fileMenu.addSeparator()

         exitAction = CallbackAction('Exit', 'Exit', self.exit)
         self.addAction(exitAction, 'X', None, None, fileMenu)

         return toolBar


     def addAction(self, action, mnemonic, accelerator, toolBar, menu):
         ''' Add an action to a toolbar and a menu '''
         if toolBar:
             toolbarButton = JButton(action)
             toolBar.add(toolbarButton)

         if menu:
             menuItem = JMenuItem(action)

             if mnemonic:
                 menuItem.setMnemonic(mnemonic)

             if accelerator:
 
                menuItem.setAccelerator(KeyStroke.getKeyStroke(ord(accelerator), 
                Event.CTRL_MASK, 0))

                menu.add(menuItem)


     def new(self):
         self.infoPanel.append('New\n')


     def open(self, filePath=None):
         self.infoPanel.append('Open\n')

     def save(self):
         self.infoPanel.append('Save\n')


     def exit(self, event=None):
         java.lang.System.exit(0)

if __name__ == '__main__':
     from javax.swing import JFrame, UIManager

     UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName() )
     JFrame.setDefaultLookAndFeelDecorated(1)

     frame = DocWindow()
     frame.setVisible(1)

# show it
frame = DocWindow()
frame.setVisible(1)