package awt;

import java.awt.*;

 A Panel that resizes itself when the image size becomes known. 
public class ImagePanel extends Panel {
	Image im;
	Frame frame;

	public ImagePanel(Image i) {
		im = i;
	}

	public ImagePanel(Image i,Frame f) {
		im = i;
		frame = f;
	}

	public boolean imageUpdate(Image img,int infoflags,int x,int y,int w,int h) {
		if (frame!=null && (infoflags&HEIGHT)!=0 && (infoflags&WIDTH)!=0 && w>0 && h>0) {
			Rectangle bounds = getBounds();
			if (bounds.width<w || bounds.height<h) {	// Too small; enlarge
				// Note that this does not work ...
				setSize(w,h);
				invalidate();	// my dimensions changed
//				getParent().validate();
				frame.pack();
				frame.show();
			}
		}
		return super.imageUpdate(img,infoflags,x,y,w,h);
	}

	public Dimension getPreferredSize() {
		if (im == null) return new Dimension(150,187);
		int w = im.getWidth(this);
		if (w<0) w = 150;
		int h = im.getHeight(this);
		if (h<0) h = 187;
		return new Dimension(w,h);
	}

	public Dimension getMinimumSize() {
		return getPreferredSize();
	}

	public void paint(Graphics g) {
		// eerst de achtergrond tekenen
		int w = im.getWidth(this);
		int h = im.getHeight(this);
		if (w>0 && h>0) {
			Dimension siz = getSize();
			g.drawImage(im,(siz.width-w)/2,(siz.height-h)/2,this);
		} else g.drawImage(im,0,0,this);
		// dan de (hopelijk min of meer transparante lightweight)
		// componenten
		super.paint(g);
	}

	// Avoid flicker when the image comes in
	public void update(Graphics g) {
		paint(g);
	}
}