Thread: mouseClicked and color objects in arrays

Hey guys!

I have coded an applet that will show something like this (mines a different color):



The code below does WORK. The mouseListener part doesn't.

 
public class ColoredSquares extends JApplet implements MouseListener
{
 
	Random rand = new Random();
	private MouseEvent evt = null;
	private boolean isClicked;
 
	// declare instance variables
	// initialize instance variable with an array of Color objects
	Color [][] a;
	Color randC;
	int x, y;
	int myClickX;
	int myClickY;
 
 
    // generates a color
    public Color Color(Color randC) 
    {
   	// huge method, omitted to make code shorter
	}
 
    public void init ()
    {
    	// sets window size of the applet viewer
    	 setSize(800,800);
 
        // fill entire applet with background color
        setBackground(Color.BLACK);
 
		// fill array with 8x8 color objects 
		a = new Color[8][8]; 
 
		for (int x = 0; x < a.length; x++)
			for (int y = 0; y < a.length; y++)
				a[x][y] = Color(randC);
 
        // implement MouseListener interface
		this.addMouseListener(this);        <--- I think this line is WRONG
    } // end init method
 
 
    public void paint(Graphics g)
    {	   	
 
    	// rectangle size is determined by applet size
    	// leave space at the bottom to draw a string
    	int rowHeight = (getHeight() / 8) - 5;
    	int colWidth = (getWidth() / 8);
 
        // loop through each array object and paint a rectangle
        for (int row = 0; row < a.length; row++)
	     {
		    for (int col = 0; col < a.length; col++)
		    {
 
		    	g.setColor(a[row][col]);
		        g.fillRect(col*colWidth, row*rowHeight, colWidth, rowHeight );	
 
 
		    }
	     }
 
 
	   	// if mouseClicked is true, then change the color of the square that was clicked on 
	   	if (evt != null && isClicked == true)
	   	{
 
	    	// if a square is clicked on
	        // the square turns red
	   		 g.setColor(Color.red);
	         int col = 0;
			 int row = 0;
			 g.fillRect(col*colWidth, row*rowHeight, colWidth, rowHeight );
	   	}
 
    } // end paint method
 
 
 
	public void mouseClicked(MouseEvent evt)
	{
		// save the evt pointer in my global variable
		 this.evt = evt;
 
		// stores the current click of the mouse, X and Y position
		 myClickX = evt.getX();
		 myClickY = evt.getY();
 
 
                 NOT sure what to do HERE V V below V V
 
 
		 // if an array element is clicked
		 //		return isClicked = true
		 // else 
		 //		return isClicked = false
 
 
 
		repaint();
	} // end mouseClicked method
 
	public void mouseExited(MouseEvent evt)	{}
	public void mouseEntered(MouseEvent evt) {}
	public void mouseReleased(MouseEvent evt) {}
	public void mousePressed(MouseEvent evt) {}
 
 
} // end class

What I want to happen is when I click on one of the squares in the applet, I want to change the color of the array element corresponding to that square to RED.

I don't believe any other method is to be added-- use the methods already stated. No JPanel recommendations please. I'm not supposed to use that.

I know that in my mouseListener I want to find WHICH index of the array was clicked. Then return that the click is true. In my paint, I want "if click is true, then set color to red, and paint that index". Or something like that...

Please at least give me an example of a mouseListener with a multidimensional array. >_<
Any help would be much appreciated.

Hey guys!

I have coded an applet that will show something like this (mines a different color):



The code below does WORK. The mouseListener part doesn't.

 
public class ColoredSquares extends JApplet implements MouseListener
{
 
	Random rand = new Random();
	private MouseEvent evt = null;
	private boolean isClicked;
 
	// declare instance variables
	// initialize instance variable with an array of Color objects
	Color [][] a;
	Color randC;
	int x, y;
	int myClickX;
	int myClickY;
 
 
    // generates a color
    public Color Color(Color randC) 
    {
   	// huge method, omitted to make code shorter
	}
 
    public void init ()
    {
    	// sets window size of the applet viewer
    	 setSize(800,800);
 
        // fill entire applet with background color
        setBackground(Color.BLACK);
 
		// fill array with 8x8 color objects 
		a = new Color[8][8]; 
 
		for (int x = 0; x < a.length; x++)
			for (int y = 0; y < a.length; y++)
				a[x][y] = Color(randC);
 
        // implement MouseListener interface
		this.addMouseListener(this);        <--- I think this line is WRONG
    } // end init method
 
 
    public void paint(Graphics g)
    {	   	
 
    	// rectangle size is determined by applet size
    	// leave space at the bottom to draw a string
    	int rowHeight = (getHeight() / 8) - 5;
    	int colWidth = (getWidth() / 8);
 
        // loop through each array object and paint a rectangle
        for (int row = 0; row < a.length; row++)
	     {
		    for (int col = 0; col < a.length; col++)
		    {
 
		    	g.setColor(a[row][col]);
		        g.fillRect(col*colWidth, row*rowHeight, colWidth, rowHeight );	
 
 
		    }
	     }
 
 
	   	// if mouseClicked is true, then change the color of the square that was clicked on 
	   	if (evt != null && isClicked == true)
	   	{
 
	    	// if a square is clicked on
	        // the square turns red
	   		 g.setColor(Color.red);
	         int col = 0;
			 int row = 0;
			 g.fillRect(col*colWidth, row*rowHeight, colWidth, rowHeight );
	   	}
 
    } // end paint method
 
 
 
	public void mouseClicked(MouseEvent evt)
	{
		// save the evt pointer in my global variable
		 this.evt = evt;
 
		// stores the current click of the mouse, X and Y position
		 myClickX = evt.getX();
		 myClickY = evt.getY();
 
 
                 NOT sure what to do HERE V V below V V
 
 
		 // if an array element is clicked
		 //		return isClicked = true
		 // else 
		 //		return isClicked = false
 
 
 
		repaint();
	} // end mouseClicked method
 
	public void mouseExited(MouseEvent evt)	{}
	public void mouseEntered(MouseEvent evt) {}
	public void mouseReleased(MouseEvent evt) {}
	public void mousePressed(MouseEvent evt) {}
 
 
} // end class

What I want to happen is when I click on one of the squares in the applet, I want to change the color of the array element corresponding to that square to RED.

I don't believe any other method is to be added-- use the methods already stated. No JPanel recommendations please. I'm not supposed to use that.

I know that in my mouseListener I want to find WHICH index of the array was clicked. Then return that the click is true. In my paint, I want "if click is true, then set color to red, and paint that index". Or something like that...

Please at least give me an example of a mouseListener with a multidimensional array. >_<
Any help would be much appreciated.