Language Java Nosugar Graphics Font Code Fontwobbler.java

// 
//	FontWobbler class
//	part of the set of documents known as Java no sugar.
//	Copyright (c) 1996 Sunil Gupta, sunil@magnetic.demon.co.uk
//	placed into the public domain by the author
//
import java.awt.*;
	
public class FontWobbler extends ThreadedCanvas
{
	//*******************************************************************
	// globals
	//*******************************************************************
	static final String HELVETICA = "Helvetica";
	static final String TIMES = "TimesRoman";
	static final String COURIER ="Courier";
	static final String DIALOG = "Dialog";
	static final String DIALOGINPUT = "DialogInput";
	static final String ZAPFDINGBATS = "ZapfDingbats";

	static final String PLAIN = "Normal";
	static final String ITALIC = "Italic";
	static final String BOLD = "Bold";
	static final String BOLDITALIC = "BoldItalic";

	//*******************************************************************
	// instance variables
	//*******************************************************************
	Font the_font;
	String the_caption;
	int x,y;
	FontMetrics metrics = null;
	
	//*******************************************************************
	// Public interface
	//*******************************************************************
	public void wobbleFont(String font_name, String font_style, String font_size)
	{
		int style;
		
		// ------------------ build font ---------------
		if ( font_style.equals(ITALIC))
			style = Font.ITALIC;
		else if ( font_style.equals(BOLD))
			style = Font.BOLD;
		else if ( font_style.equals(BOLDITALIC))
			style = Font.ITALIC + Font.BOLD;
		else
			style = 0;

		the_font = new Font(font_name, style, Integer.parseInt(font_size));
		the_caption = font_name + "-" + font_style + "-" + font_size;
		
		start();
	}
	
	//*******************************************************************
	// APPLET 
	//*******************************************************************
	public Dimension minimumSize() 	
	{
		return ( new Dimension(200,200));
	}

	//*******************************************************************
	// THREADS 
	//*******************************************************************
	public void onRun(Graphics g)
	{
		g.setFont(the_font);
		metrics = g.getFontMetrics();
			
		x = (rect.width -metrics.stringWidth(the_caption) ) / 2;
		y = (rect.height -metrics.getHeight()) / 2;
	}
	
	//------draw the font with small but random offset---
	public void onLoop(Graphics g)
	{
		int dx,dy;
		
		dx = (int) (5 * Math.random());
		dy = (int) (5 * Math.random());
		g.drawString( the_caption, x+dx, y+dy);
	}
}

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