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

public class framecomponents extends Applet implements WindowListener {

Frame frame;

public void init() 
{
	frame = new Frame("A frame");
	frame.setLayout(new GridBagLayout());
	frame.setBounds(100, 100, 600, 300);
	Checkbox checkbox1 = new Checkbox("Checkbox with no background set");
	constrain(frame, checkbox1, 0, 0, 1, 1, GridBagConstraints.WEST, 0, 0, 0, 0, GridBagConstraints.NONE, 0, 0);
    Checkbox checkbox2 = new Checkbox("Checkbox with SystemColor.window background set");
    checkbox2.setBackground(SystemColor.window);
    constrain(frame, checkbox2, 0, 1, 1, 1, GridBagConstraints.WEST, 15, 0, 0, 0, GridBagConstraints.NONE, 0, 0);
    Checkbox checkbox3 = new Checkbox("Checkbox with white background set");
    checkbox3.setBackground(Color.white);
    constrain(frame, checkbox3, 0, 2, 1, 1, GridBagConstraints.WEST, 15, 0, 0, 0, GridBagConstraints.NONE, 0, 0);
	frame.validate();
	frame.show();
	frame.addWindowListener(this);
}

static final void constrain(Container container, Component component, int grid_x, int grid_y, 
		int grid_width, int grid_height, int anchor, int topPad, int leftPad, int bottomPad, 
		int rightPad, int fill, double weightx, double weighty)
{
	GridBagConstraints c = new GridBagConstraints();
	c.gridx = grid_x;
	c.gridy = grid_y;
	c.gridwidth = grid_width;
	c.gridheight = grid_height;
	c.anchor = anchor;
	c.insets.top   = topPad;
	c.insets.left  = leftPad;
	c.insets.bottom= bottomPad;
	c.insets.right = rightPad;
	c.fill = fill;
	c.weightx = weightx;
	c.weighty = weighty;
	((GridBagLayout)container.getLayout()).setConstraints(component, c);
	container.add(component);
}

public void windowOpened(WindowEvent we){}

public void windowClosed(WindowEvent we){}

public void windowIconified(WindowEvent we){}

public void windowDeiconified(WindowEvent we){}

public void windowActivated(WindowEvent we){}

public void windowDeactivated(WindowEvent we){}

public void windowClosing(WindowEvent we)
{
	if (we.getSource() == frame)
	{
		frame.setVisible(false);
		frame.dispose();
	}
}

public void paint(Graphics g)
{
	g.drawString("A frame should pop up", 10 , 20);
}
}  // END OF Class framecomponents