import java.awt.*;
import java.awt.image.*;
import java.applet.*;
import java.net.*;

public class Picture extends Component {  // implements ImageObserver
    String file;
    Image img;
    static Applet applet;
    Dimension minSize;

    public static void setApplet(Applet a) {
        applet = a;
    }

    public Picture(int width, int height, String file) {
        setSize(width,height);
        setMinimumSize(new Dimension(width,height));
        setImage(file);
        repaint();
    }

    public void setMinimumSize(Dimension d) {
        minSize = d;
    }

    public Dimension getMinimumSize() {   // used by layout manager
        if (minSize != null)
           return minSize;
        else
           return super.getMinimumSize();
    }

    public Dimension getPreferredSize() { // used by layout manager
        return getMinimumSize();
    }

    public void setImage(String file) {
        if (file != null) {
           this.file = file;
           img = loadImage(file);
        } else {
           img = null;
        }
        repaint();
    }

    Image loadImage(String fileName) {
        Image result = null;
        repaint();
        try {
           if (applet != null) {
               result = applet.getImage(new URL(fileName));
           } else {
               result = Toolkit.getDefaultToolkit().getImage(fileName);
           }
        } catch (Exception e) {
            System.out.println("loadImage: " + e);
        }
        return result;
    }

    public void paint(Graphics g) {
        Rectangle b = getBounds();  // method of Component, returns Rectangle
        if (img != null) {
           int w = img.getWidth(null);
           int h = img.getHeight(null);
           g.drawImage(img,0,0,b.height*w/h,b.height,this);
        } else {
           g.drawRect(0,0,b.width-1,b.height-1);
        }
    }

    public boolean imageUpdate(Image image, int flags, int x, int y, int w, int h) {
        // checks if whole image is there and we're talking about the right one.
        // repainting regardless would slowly show the image as it is loaded
        if (flags == ImageObserver.ALLBITS && image == img) {
            repaint();
        }
        return true;  // says we've handled the event
    }
}