ImageFrame.java Source code

Introduction

Here is the source code for ImageFrame.java

Source

/*
 * @(#)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]));
    }
}