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Thread: Moving Icon in gridlayout SWING

  1. #1
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    Default Moving Icon in gridlayout SWING

    Hi, im very new at Java so please consider this your easiest answer for the day!

    Im trying to build a game but i suck at the basics. So I just want to get the problem fixed where so i can move an Player Object across my gridlayout and having the image updating for the keyevents like Left, Right, Up, Down... for starters.

    the code i have is something like this.



    public class Graphics extends JPanel implements ActionListener {

    public static JButton grid[][] = new JButton[12][12];
    public JFrame window;
    public Point gridLoc;
    public Player player1;
    public Player player2;

    public Graphics() {

    addKeyListener(new TAdapter());
    setFocusable(true);
    setBackground(Color.BLACK);
    setDoubleBuffered(true);
    setLayout(new GridLayout(12, 12));

    for(int x = 0; x < 12; x++){
    for(int y = 0; y < 12; y++){
    grid[x][y] = new JButton();
    add(grid[x][y]);
    grid[x][y].addActionListener(this);
    }
    }
    }

    public void addPlayers() throws SpriteException{
    player1 = new Player("Fire", 1);
    grid[Player.currentRow][Player.currentCol].setIcon(player1.getPic());
    player2 = new Player("Wizard", 2);
    grid[Player.currentRow][Player.currentCol].setIcon(player2.getPic());
    }

    private class TAdapter extends KeyAdapter {

    public void keyPressed(KeyEvent e) {
    player1.keyPressed(e);
    }
    }


    I have left alot of code which i consider not be critical for you guys to give me some pointers on how i will get my KeyEvents to just move my Player player1 object for example.

    Thanks in advance.


  2. #2
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    Default Re: Moving Icon in gridlayout SWING

    Quote Originally Posted by Loodistobilo View Post
    Hi, im very new at Java so please consider this your easiest answer for the day!

    Im trying to build a game but i suck at the basics. So I just want to get the problem fixed where so i can move an Player Object across my gridlayout and having the image updating for the keyevents like Left, Right, Up, Down... for starters.

    the code i have is something like this.

     
    public class Graphics extends JPanel implements ActionListener {
     
    	public static JButton grid[][] = new JButton[12][12];
    	public JFrame window;
    	public Point gridLoc;
    	public Player player1;
    	public Player player2;
     
    	public Graphics() {
     
    		addKeyListener(new TAdapter());
    		setFocusable(true);
    		setBackground(Color.BLACK);
    		setDoubleBuffered(true);
    		setLayout(new GridLayout(12, 12));
     
    		for(int x = 0; x < 12; x++){
    			for(int y = 0; y < 12; y++){
    				grid[x][y] = new JButton();
    				add(grid[x][y]);
    				grid[x][y].addActionListener(this);
    			}
    		}
    	}
     
    	public void addPlayers() throws SpriteException{
    		player1 = new Player("Fire", 1);
    		grid[Player.currentRow][Player.currentCol].setIcon(player1.getPic());
    		player2 = new Player("Wizard", 2);
    		grid[Player.currentRow][Player.currentCol].setIcon(player2.getPic());
    	}
     
    	private class TAdapter extends KeyAdapter {
     
    		public void keyPressed(KeyEvent e) {
    			player1.keyPressed(e);
    		}
    	}
    I have left alot of code which i consider not be critical for you guys to give me some pointers on how i will get my KeyEvents to just move my Player player1 object for example.

    Thanks in advance.
    Does it have a method actionPerformed?

    Also, your player1 doesn't appear to be defined in your constructor. I think it may be being lost after the method where you defined it ends.

    So it won't recognize it in the TAdapater class.

  3. #3
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    Default Re: Moving Icon in gridlayout SWING

    Did you ever tell it to set those buttons to be visible?

    Actually, I don't know what problem you're having as you've never said.

  4. #4
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    Default Re: Moving Icon in gridlayout SWING

    Hi thanks for your quick answear.

    I might aswell say that I have an ActionPerformed but for now it might aswell just be a
    System.out.println("test");
    that says if the button actually does something.

    The player class atm looks like this.
    import java.awt.Image;
    import java.awt.Rectangle;
    import java.awt.event.KeyEvent;
     
    import java.util.ArrayList;
     
    import javax.swing.ImageIcon;
     
    public class Player {
     
    	public static ImageIcon image;
    	public static ImageIcon fire = new ImageIcon("pieces/brook.png");
    	public ImageIcon wizard = new ImageIcon("pieces/bking.png");
     
    	public static int currentRow;
    	public static int currentCol;
     
    	public Player(String str, int player) throws SpriteException {	
    		if(player == 1){
    			currentRow = 5;
    			currentCol = 0;
    		}
    		if(player == 2){
    			currentRow = 0;
    			currentCol = 0;
    		}
    	}
     
    	public void moveLeft(){
    		grid[Player.currentRow][Player.currentCol].setIcon(null);
                    grid[Player.currentRow][Player.currentCol+1].setIcon(player1.getPic());
    	}
     
    	public void setImage(String str){
    		if(str.equals("Wizard")){
    			image = wizard;
    		}
    		if(str.equals("Fire")){
    			image = fire;
    		}
    	}
     
    	public static ImageIcon getPic(){
    		ImageIcon p = image;
    		return p;
    	}
     
        public void keyPressed(KeyEvent e) {
            int key = e.getKeyCode();
            if (key == KeyEvent.VK_LEFT) { 
            	moveLeft();
            }
        }
     
    }
    I havent really been doing the movement yet. I just want the keyEvent to work. Since now i dont even get a system.out.print if i put on for Space. It just gives me alot of Nullpointerexceptions etc.

    Thanks.
    Last edited by Loodistobilo; November 24th, 2010 at 07:02 PM.

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