Glasspane Demo

1
Glasspane Demo

• How to Use Root Panes

2
http//java.sun.com/j2se/1.4.2/docs/api/javax/swin
g/JRootPane.html
3
http//java.sun.com/docs/books/tutorial/uiswing/co
mponents/rootpane.html
4
javax.swing.SwingUtilities
invokeLater
public static void invokeLater(Runnable doRun)
after all pending AWT events have been processed
class XXX implements Runnable public void
run() CreateAndShowGUI()

• The method should be used when the thread needs
  to updated the GUI

5
javax.swing.SwingUtilities
invokeLater
Examle code
Runnable doHelloWorld new Runnable()
public void run() System.out.println("H
ello World on " Thread.currentThread())
SwingUtilities.invokeLater(doHelloWorld)
System.out.println("This might well be displayed
before the other message.")

• If invokeLater is called from the event
  dispatching thread

• The run method will be deferred until all pending
  events have been processed

Such as JButtons ActionListener
6
GlassPane Demo

• ??
• GlassPane visible ?, ??????Form ?event
• ???? SwingUtilities.convertPoint method ?
  glasspane ??????? Form ??????????????????????
• ?????? component.dispatchEvent ??? Event ???????