java

import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.geom.*;
import javax.swing.*;
import java.awt.event.InputEvent;

class GridPanel extends JPanel implements MouseListener, MouseMotionListener
{

	int numCols;
	int numRows;
	int getButton;

	int colindex=-1;
	int rowindex=-1 ;


		int getColumn(int x){
			  colindex =(numCols * x )/ getWidth();

			return colindex;
		}

		int getRow(int y){

			rowindex = (numRows * y) / getHeight();
			return rowindex ;

		}









	public GridPanel(int nc, int nr)
	{
		numCols = nc;
		numRows = nr;
		addMouseListener(this);
		addMouseMotionListener(this);

	}

	Rectangle getRect(int thisCol, int thisRow)
	{
		// if input is out of range, return "null"
		if(thisCol <0 || thisRow < 0)
			return null;
		if(thisCol >= numCols || thisRow>=numRows)
			return null;

		// otherwise, make and return the Rectangle
		int w = getWidth()/numCols;
		int h = getHeight()/numRows;

		int x = thisCol*w;
		int y = thisRow*h;


		Rectangle myRect = new Rectangle(x,y,w,h);
		return myRect;
	}

	public void paint(Graphics g)
	{
		g.setColor(Color.gray);
		g.fillRect(0,0,getWidth(), getHeight());
		g.setColor(Color.black);


		Graphics2D g2 = (Graphics2D)g;
		// we'll use Graphics2D for it's "draw" method -
		// neater than the Graphics "drawRect" suppled
		// (which you could also use)

		for (int i = 0;i<numCols;i++)
		{
			for(int j = 0;j<numRows;j++)
			{
				Rectangle r = getRect(i,j);
				g2.draw(r);
			}
		}

		Rectangle  r1 = getRect(colindex,rowindex);

		if (getButton ==1 ){

			g2.setColor(Color.red);


		}else{

			g2.setColor(Color.yellow);

		}


	if(colindex >-1 && rowindex >-1){

			g2.fillOval(r1.x,r1.y, r1.width, r1.height);

			}








		}


		public void mouseMoved(MouseEvent event){






		}

		public void mouseDragged(MouseEvent event){
			int x = event.getX();
			int y = event.getY();





						    getButton = event.getButton();


						int cc =event.getClickCount();

						boolean dd = event.isControlDown();

						getColumn(x);
								getRow(y);


							System.out.println("the x position is " + x);
							System.out.println("the y position is " + y);
							System.out.println("Mouse click " + rowindex+","+colindex);
								System.out.println("Mouse click " + cc + dd);



								 repaint();





		}


	public void mouseClicked(MouseEvent event) {
		// TODO Auto-generated method stub







	}

	@Override
	public void mouseEntered(MouseEvent event) {
		// TODO Auto-generated method stub
		System.out.println("mouse enter :)))");
	}

	@Override
	public void mouseExited(MouseEvent event) {
		// TODO Auto-generated method stub
		System.out.println("Exit :)))");
	}

	@Override
	public void mousePressed(MouseEvent event) {
		// TODO Auto-generated method stub
		int x = event.getX();
				int y = event.getY();


			    getButton = event.getButton();
			     colindex =(7 * x )/ getWidth();
				rowindex = (5 * y) / getHeight();
			int cc =event.getClickCount();

			boolean dd = event.isControlDown();


				System.out.println("the x position is " + x);
				System.out.println("the y position is " + y);
				System.out.println("Mouse click " + rowindex+","+colindex);
					System.out.println("Mouse click " + cc + dd);



					 repaint();


	}

	@Override
	public void mouseReleased(MouseEvent event) {
		// TODO Auto-generated method stub




	}


	// copied from the W2MouseEvents for convenience
	// (so we can run the program from GridPanel class too!)
	public static void main(String[] args)
	{
		W2MouseEvents w = new W2MouseEvents();
		w.setVisible(true);


	}





}