//GridSimple.java
//one pixel wide gridlines

import java.awt.*;
import javax.swing.*;

public class GridSimple extends JApplet { 

    int widthGap, heightGap;
	    
    public void init() {
	String input;
	
	input = JOptionPane.showInputDialog( "Enter gap width in pixels");
    	widthGap = Integer.parseInt( input );
	input = JOptionPane.showInputDialog( "Enter gap height in pixels");
    	heightGap = Integer.parseInt( input );
/*	input = JOptionPane.showInputDialog( "Enter width in cells");
    	widthCells = Integer.parseInt( input );
	input = JOptionPane.showInputDialog( "Enter height in cells");
    	heightCells = Integer.parseInt( input );
  */  }
    
    public void paint (Graphics g) {
	                
	int width=getWidth(), height=getHeight();
	for (int r=0; r<=height/heightGap; r++)   //rows
	    g.drawLine(0,r*(heightGap+1), width,r*(heightGap+1));
	              
	for (int c=0; c<=width/widthGap; c++)    //columns
	    g.drawLine(c*(widthGap+1),0, c*(widthGap+1),height);
   }
}