/* 
File: 		Bubble.java

Author: 	Chris Johnson
		johnson@dcs.gla.ac.uk
		
Modified:	16/10/98

Acknowledgement:

This is based on an Applet developed by D.M. Geary in Graphic Java 1.1,
Sunsoft Press, 1997, p.280.   His version is based on AWT1.1 - I've 
adapted it to run under AWT1.0.
		
Description:

This class provides a constructor to takes any graphical component and a 
string.   It references the frame associated with the component and constructs
a window in that frame.   Paint() is over-ridden to put a border round the
window and add the text associated with the component.

*/

import java.awt.*;

public class Bubble extends Window {
	private String text;
	
	public Bubble(Component comp, String text) {
		super(getFrame(comp));
		this.text = text;
		setForeground(Color.black);
	}
			
	public Dimension preferredSize() {
		
		Graphics g = getGraphics();
		FontMetrics fm = g.getFontMetrics();
		
	 return new Dimension(fm.stringWidth(text)+4, fm.getHeight()+4);
	}
	
	public void paint(Graphics g) {
		Dimension Component_size = size();
		FontMetrics fm = g.getFontMetrics();
		g.drawRect(0,0,Component_size.width-1, Component_size.height-1);
		g.drawString(text, 2, fm.getAscent()+2);
	}
		
	public void show(){
		pack();
		super.show();
	}
	
	static Frame getFrame(Component c) {
		Frame frame = null;
		
		while ((c=c.getParent()) != null)
		if (c instanceof Frame)
			frame = (Frame)c;
		
		return frame;
	}
}