def run(self):
frame = JFrame('ComponentEventDemo',
locationRelativeTo=None,
defaultCloseOperation=JFrame.EXIT_ON_CLOSE)
cp = frame.getContentPane()
cp.setLayout(BorderLayout())
self.display = JTextArea(editable=0,
font=Font('Courier', Font.PLAIN, 12))
myListener = listener(self.display)
frame.addComponentListener(myListener)
scrollPane = JScrollPane(self.display,
preferredSize=Dimension(350, 210))
cp.add(scrollPane, BorderLayout.CENTER)
panel = JPanel(BorderLayout(), componentListener=myListener)
self.button = JButton('Clear',
actionPerformed=self.clear,
componentListener=myListener)
panel.add(self.button, BorderLayout.CENTER)
visible = JCheckBox('Button visible',
selected=1,
itemStateChanged=self.showHide,
componentListener=myListener)
panel.add(visible, BorderLayout.PAGE_END)
cp.add(panel, BorderLayout.PAGE_END)
frame.pack()
frame.setVisible(1)
