Standalone Image Viewer - works with any AWT-supported format
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.awt.*;
import javax.swing.*;
import java.net.*;
/**
* Standalone Image Viewer - works with any AWT-supported format.
*/
public class ImageView extends JComponent {
/** The Image object */
protected Image im;
/** Size of the image */
protected int width, height;
/** The graphical component */
protected Container cp;
/** The name of the image file */
protected String fileName;
/** Construct an ImageView viewer, given a filename. */
public ImageView(String fileName) {
this.fileName = fileName;
cp = this;
}
public void loadImage() {
URL url = getClass().getResource(fileName);
im = Toolkit.getDefaultToolkit().getImage(url);
// ----- This part omitted from course notes for brevity -----
// Use a MediaTracker to show the "best"? way of waiting
// for an image to load, and how to check for errors.
MediaTracker mt = new MediaTracker(this);
mt.addImage(im, 0);
try {
mt.waitForID(0);
} catch(InterruptedException e) {
System.err.println("Unexpected interrupt in waitForID!");
return;
}
if (mt.isErrorID(0)) {
System.err.println("Couldn't load image file " + fileName);
return;
}
// Now that we know the image has been loaded,
// it is safe to take its width and height.
// ----- End of part omitted from course notes for brevity -----
width = im.getWidth(this);
height = im.getHeight(this);
setSize(width, height);
}
public void paint(Graphics g) {
g.drawImage(im, 0, 0, this);
}
public static void main(String[] arg) {
if (arg.length == 0) {
System.err.println("Usage: ImageView file [...]");
} else {
for (int i=0; i<arg.length; i++) {
JFrame jf = new JFrame("ImageView: " + arg[i]);
ImageView iv = new ImageView(arg[i]);
jf.getContentPane().add(iv);
iv.loadImage();
jf.setSize(iv.getSize());
jf.setVisible(true);
}
}
}
}
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