Use the mouse position

[susan]

I hope someone can enlighten me as I have no idea how to do what im trying to do.

I have an applet which has a grid of 225 squares (15x15). The grid starts at 200, 0. The squares are 40x40. I have added a mouselistener and have coded it to execute a method on mousedown. What I am trying to do is make a method that finds the square that the mouse was clicked in, without coding 225 if(mouse is here) do something statements.

What I am asking is if there is a way to get the x, y values of the corner of the square in which the user clicked. Example: the user clicks at 212, 5. The method will return 200, 0 (the x,y position of the corner of the topleft square in the grid).

Code:

	public void paintGrid(Graphics g)
	{
		
		g.setColor(Color.gray);
		
		for(int x = 200; x < 800; x += 40)
		{
			for(int y = 0; y < 600; y += 40)
			{
				g.drawRect(x, y, 40, 40);
			}
		}
	}

Thanks

[marco]

use this applet template i made
all variables are 'private' variables, and this one responds to the mouse (x and y variables) as well as clicks and drags!! ^^ - you can also use the keyboard with this one (input in ASCII form tho)

Code:

//TestApplet
import java.lang.*;
import java.awt.*;
import java.applet.*;

public class TestNewApplet extends Applet implements Runnable
{

    private int x, y, key; //Mouse X and Y
    private Thread pgm;  // program loop
    private boolean click, drag; // True when pressed.
    //All variables go here, having a 'private' infront of them

    public void init ()  //Sets bg and game start
    {
        pgm = new Thread (this);
        pgm.start (); // Start game thread.
    }


    public void run ()  //Calls the loop to run
    {
        mainProgram (); // Runs the game
    }


    private void mainProgram ()
    {
        Graphics c = getGraphics (); //Game graphics
        for (;;)
        {
            //all code goes here    
            if (click) //Check click to disallow multiple clicks on one mouse down
                click = false;
            delay (10); //Refresh rate
        }
    } //Ends game loop method


    //Mouse methods for the program
    public boolean mouseMove (Event e, int mx, int my)
    {
        x = mx;
        y = my;
        click = false;
        drag = false;
        return true;
    }


    public boolean mouseDown (Event e, int mx, int my)
    {
        x = mx;
        y = my;
        click = true;
        drag = false;
        return true;
    }


    public boolean mouseUp (Event e, int mx, int my)
    {
        click = false;
        drag = false;
        x = mx;
        y = my;
        return true;
    }


    public boolean mouseDrag (Event e, int mx, int my)
    {
        click = false;
        drag = true;
        x = mx;
        y = my;
        return true;
    }


    public boolean keyDown (Event evt, int keyPressed)
    {
        key = keyPressed;
        return true;
    } // keyDown method


    public void delay (int tme)  //sets the delays within the game
    {
        try
        {
            Thread.sleep (tme);
        }
        catch (Exception err)
        {
        }
    }
} //Ends main applet