?? splashscreen.java
字號:
// SplashScreen.java
// SplashScreen implements static method showSplash for
// displaying a splash screen.
package com.deitel.advjhtp1.drawing;
// Java core packages
import java.awt.*;
import java.awt.event.*;
// Java extension packages
import javax.swing.*;
public class SplashScreen {
private JWindow window;
private Timer timer;
// SplashScreen constructor
public SplashScreen( Component component )
{
// create new JWindow for splash screen
window = new JWindow();
// add provided component to JWindow
window.getContentPane().add( component );
// allow user to dismiss SplashScreen by clicking mouse
window.addMouseListener(
new MouseAdapter() {
// when user presses mouse in SplashScreen,
// hide and dispose JWindow
public void mousePressed( MouseEvent event ) {
window.setVisible( false );
window.dispose();
}
}
); // end call to addMouseListener
// size JWindow for given Component
window.pack();
// get user's screen size
Dimension screenDimension =
Toolkit.getDefaultToolkit().getScreenSize();
// calculate x and y coordinates to center splash screen
int width = window.getSize().width;
int height = window.getSize().height;
int x = ( screenDimension.width - width ) / 2 ;
int y = ( screenDimension.height - height ) / 2 ;
// set the bounds of the window to center it on screen
window.setBounds( x, y, width, height );
} // end SplashScreen constructor
// show splash screen for given delay
public void showSplash( int delay ) {
// display the window
window.setVisible( true );
// crate and start a new Timer to remove SplashScreen
// after specified delay
timer = new Timer( delay,
new ActionListener() {
public void actionPerformed( ActionEvent event )
{
// hide and dispose of window
window.setVisible( false );
window.dispose();
timer.stop();
}
}
);
timer.start();
} // end method showSplash
// return true if SplashScreen window is visible
public boolean isVisible()
{
return window.isVisible();
}
}
/***************************************************************
* (C) Copyright 2002 by Deitel & Associates, Inc. and *
* Prentice Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have *
* used their best efforts in preparing the book. These *
* efforts include the development, research, and testing of *
* the theories and programs to determine their effectiveness. *
* The authors and publisher make no warranty of any kind, *
* expressed or implied, with regard to these programs or to *
* the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for *
* incidental or consequential damages in connection with, or *
* arising out of, the furnishing, performance, or use of *
* these programs. *
***************************************************************/
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