A frame that displays an image
/*
* @(#)ImageFrame.java 0.90 9/19/00 Adam Doppelt
*/
import java.awt.*;
import java.awt.image.MemoryImageSource;
import java.io.File;
import java.io.IOException;
/**
* A frame that displays an image. Create an ImageFrame, then use one
* of the setImage() methods to show the image.
*
* @version 0.90 19 Sep 2000
* @author <a href="http://www.gurge.com/amd/">Adam Doppelt</a>
*/
public class ImageFrame extends Frame {
int left = -1;
int top;
Image image;
ImageFrame() {
setLayout(null);
setSize(100, 100);
}
/**
* Set the image from a file.
*/
public void setImage(File file) throws IOException {
// load the image
Image image = getToolkit().getImage(file.getAbsolutePath());
// wait for the image to entirely load
MediaTracker tracker = new MediaTracker(this);
tracker.addImage(image, 0);
try {
tracker.waitForID(0);
} catch (InterruptedException e) {
e.printStackTrace();
}
if (tracker.statusID(0, true) != MediaTracker.COMPLETE) {
throw new IOException("Could not load: " + file + " " +
tracker.statusID(0, true));
}
setTitle(file.getName());
setImage(image);
}
/**
* Set the image from an AWT image object.
*/
public void setImage(Image image) {
this.image = image;
setVisible(true);
}
/**
* Set the image from an indexed color array.
*/
public void setImage(int palette[], int pixels[][]) {
int w = pixels.length;
int h = pixels[0].length;
int pix[] = new int[w * h];
// convert to RGB
for (int x = w; x-- > 0; ) {
for (int y = h; y-- > 0; ) {
pix[y * w + x] = palette[pixels[x][y]];
}
}
setImage(w, h, pix);
}
/**
* Set the image from a 2D RGB pixel array.
*/
public void setImage(int pixels[][]) {
int w = pixels.length;
int h = pixels[0].length;
int pix[] = new int[w * h];
// convert to RGB
for (int x = w; x-- > 0; ) {
for (int y = h; y-- > 0; ) {
pix[y * w + x] = pixels[x][y];
}
}
setImage(w, h, pix);
}
/**
* Set the image from a 1D RGB pixel array.
*/
public void setImage(int w, int h, int pix[]) {
setImage(createImage(new MemoryImageSource(w, h, pix, 0, w)));
}
/**
* Get the image.
*/
public Image getImage() {
return image;
}
/**
* Overridden for double buffering.
*/
public void update(Graphics g) {
paint(g);
}
/**
* Paint the image.
*/
public void paint(Graphics g) {
// the first time through, figure out where to draw the image
if (left == -1) {
Insets insets = getInsets();
left = insets.left;
top = insets.top;
setSize(image.getWidth(null) + left + insets.right,
image.getHeight(null) + top + insets.bottom);
}
g.drawImage(image, left, top, this);
}
public static void main(String args[]) throws IOException {
ImageFrame f = new ImageFrame();
f.setImage(new File(args[0]));
}
}
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