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Thread: JAVA LOOP HELP!!!

  1. #1
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    Default JAVA LOOP HELP!!!

    In this program, I need help in creating a loop in the paint method of Abacus Panel Class whose purpose is to find out the number of counters and draw these counters in the row of the selected column. The purpose of this program is to allow the user to add a counter in the row of the selected column when user clicks on it. (Any help on it or some ideas would be very much helpful for me)

     
    import java.awt.*;
    import java.awt.geom.*;
    import javax.swing.*;
    import java.awt.event.MouseListener;
    import java.awt.event.MouseEvent;
     
    class AbacusPanel extends JPanel implements MouseListener
    {
    	AbacusModel myAbacus;
     
     
     
     
    	int numCols;
    	int numRows;
    	int button;
     
     
    	public static void main(String[] args)
    	{
    		AbacusFrame w = new AbacusFrame();
    		w.setVisible(true);
    	}
     
     
    	public AbacusPanel(int nc, int nr)
    	{
    		numCols = nc;
    		numRows = nr;
    		addMouseListener(this);
    		myAbacus = new AbacusModel(numCols,numRows);
    	}
    	int getCol(int x)
    	{
    		return x*numCols/getWidth();
    	}
    	int getRow(int y)
    	{
    		return y*numRows/getHeight();
    	}
     
    	public void mouseReleased(MouseEvent event)
    	{
    	}
    	public void mousePressed(MouseEvent event)
    	{
    	}
    	public void mouseClicked(MouseEvent event)
    	{
    		int thisCol = getCol(event.getX());
    		int thisRow = getRow(event.getY());
    		System.out.println
    		("you clicked in column " + thisCol);
    		button = event.getButton();
    		if (button ==1)
    		{
    myAbacus.addCounter(getCol(event.getX()));
    		}
    		if (button ==3)
    		{
    myAbacus.removeCounter(getCol(event.getX()));
    		}
    System.out.println("peg selected="+getCol(event.getX())+ " and Counter contained="+myAbacus.getNumCounters(getCol(event.getX())));
    repaint();
     
    	}
    	public void mouseEntered(MouseEvent event)
    	{
    	}
    	public void mouseExited(MouseEvent event)
    	{
    	}
     
     
    	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++)
    			{
    				g2.draw(getRect(i,j));
    			}
    		}
    	for(int thisRow = 0;thisRow<numRows;thisRow++)
     
    				{
    					for(int thisCol = 0;thisCol<numCols;thisCol++)
     
    					{
     
     
     
    					}
    			}
    	}
    }

    import java.awt.*;
    import java.util.Arrays;
    import javax.swing.*;
     
    public class AbacusModel extends JFrame
    {
     
    int num_of_pegs;
    int max_num_counters;
    int peg_array[];
     
    public  AbacusModel(int num_pegs, int num_counters)
    {
     
    max_num_counters = num_counters;
    num_of_pegs = num_pegs;
    peg_array = new int[num_of_pegs];
     
    }
     
    public int getNumCounters(int thisPeg)
    {
    	if (thisPeg < 0 || thisPeg >= num_of_pegs)
    	return 0;
    	else
    	return peg_array[thisPeg];
    }
     
    public boolean addCounter(int thisPeg)
    {
    if (thisPeg <0 || thisPeg >= num_of_pegs)
     
    return false;
     
    if (peg_array[thisPeg] >= max_num_counters)
    return false;
     
    peg_array[thisPeg]++;
    return true;
     
    }
    public boolean removeCounter (int thisPeg)
    {
    if (thisPeg <0 || thisPeg >= num_of_pegs)
    return false;
    if( peg_array[thisPeg] <=0)
    return false;
     
    peg_array[thisPeg]--;
    return true;
    }
     
     
     
     
     
     
    }

    import java.awt.*;
    import java.awt.geom.*;
    import javax.swing.*;
     
     
    public class AbacusFrame extends JFrame
    {
    	AbacusPanel theAbacusPanel;
     
    	public static void main(String[] args)
    	{
    		AbacusFrame w = new AbacusFrame();
    		w.setVisible(true);
    	}
     
    	public AbacusFrame()
    	{
    		setTitle("Workshop 3 (Abacus): starting code");
    		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    		setSize(500,220);
    		setLocation(300,300);
    		theAbacusPanel = new AbacusPanel(5, 7);
    		add(theAbacusPanel);
     	}
     
     }


  2. #2
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    Default Re: JAVA LOOP HELP!!!

    Can you explain what your problem is?

  3. #3
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    Default Re: JAVA LOOP HELP!!!

    My problem is , I don't know how to use the NumCounters method from the from the "AbacusModel class" inside the paint method of "AbacuPanel class" to create a loop so that the program can understand how many counters to be drawn in each rows of the selected column.

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: JAVA LOOP HELP!!!

    Where is the NumCounters() method? I do not find one when I search for it.

  5. #5
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    Default Re: JAVA LOOP HELP!!!

    don't worry,, i will try to solve it myself... sorry for trouble...

  6. #6
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    Default Re: JAVA LOOP HELP!!!

    Good luck.

    When you ask someone to look at your code, it is very useful if you spell the names correctly and not require any guessing.

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