import java.applet.*;
import java.awt.*;
import java.awt.event.*;

public class apple_properties3 extends Applet implements ActionListener {

LabelCanvas myLabel;
Button b;
boolean propertyValue = false;
	
public void init() 
{
	setBackground(new Color(240, 225, 255));
	setAppleProperty("awt.textantialiasing", getPropertyName());
	myLabel = new LabelCanvas("Text should just fit horizontally on the Canvas");
	myLabel.setBackground(Color.cyan);
	add(myLabel);
	b = new Button(getButtonText());
	b.addActionListener(this);
	add(b);
	invalidate();
	validate();
}

String getPropertyName()
{
	return(propertyValue? "on" : "off");
}

String getButtonText()
{
	return("Turn textantialiasing " + (propertyValue? "off" : "on"));
}

void setAppleProperty(String s, String value)
{
    try 
	{
		Class stringClass = Class.forName("java.lang.String");
		Class.forName("java.lang.System").getMethod("setProperty", new Class[]{stringClass,
			stringClass}).invoke(null, new Object[]{"apple." + s, value});
    } 
	catch (Exception e) {}
}

public void actionPerformed(ActionEvent ae)
{
	if (ae.getSource() == b) 
	{
		propertyValue = !propertyValue;
		setAppleProperty("awt.textantialiasing", getPropertyName());
		b.setLabel(getButtonText());
		repaint();
	}
}

public final void paint(Graphics g)
{
	g.drawString("width of box = " + myLabel.width, 10, getSize().height - 25);
	g.drawString("Property apple.awt.textantialiasing = " + System.getProperty("apple.awt.textantialiasing"),
		10, getSize().height - 5);
}	
}  //  END OF Class apple_properties3



class LabelCanvas extends Canvas  {	
									
int height;
int width;
Font f;
String label;
boolean needToResetWidth;

LabelCanvas(String label)
{
	this.label = label;
	f = new Font("Serif", Font.BOLD, 17);
	height = 30;
	needToResetWidth = true;
}

final void setWidth(Graphics g)
{
	g.setFont(f);
	FontMetrics fm = g.getFontMetrics();
	width = fm.stringWidth(label);
	needToResetWidth = false;		
}

public void addNotify()
{
	super.addNotify();
	repaint();
}

public final void paint(Graphics g)
{
	g.setFont(f);
	if (needToResetWidth) setWidth(g);
	g.drawString(label, 0, height - 5);
}	

public final Dimension getMinimumSize()
{
	if (needToResetWidth)
	{
		Graphics g = getGraphics();
		setWidth(g);
		g.dispose();
	}
	return (new Dimension(width, height));
}

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

public final void update(Graphics g)
{
	paint(g);
}
}  // END OF Class LabelCanvas