Re: Need some help.....

From:
Knute Johnson <nospam@rabbitbrush.frazmtn.com>
Newsgroups:
comp.lang.java.help
Date:
Thu, 17 Apr 2008 16:51:45 -0700
Message-ID:
<4807e292$0$1610$b9f67a60@news.newsdemon.com>
TheBigPJ wrote:

My problem is that it wont display the given image, can anyone tell me
what thing ive done wrong or missed. I changed something and I cant
remember what..... its going to be one thing that needs to be changed
back :S

It only displays a small white box inside a JFrame that is the colour
I want it to be.

theCAS_Engine works perfectly. Like I said I changed something last
night and forgot to run it to check it worked and now it doesnt
work :S

Thanks,
Peter
------------------------------------------
import javax.swing.*;
import java.awt.*;
import java.util.*;
import java.awt.event.MouseListener;
import java.awt.event.MouseEvent;

public class CAS_Interface extends JPanel implements MouseListener{

    CAS_Engine theCAS_Engine;
    boolean running;

    public static void main(String[] args)
    {
 JFrame mainWindow = new JFrame("CASAT - Connect a Square on a
Tesseract (Multiplayer)");

 JPanel content = new JPanel();
 content.add(new CAS_Interface(), BorderLayout.WEST);

 mainWindow.setContentPane(content);

 mainWindow.getContentPane().setBackground(new Color(176,196,222));
 mainWindow.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 mainWindow.setLocationRelativeTo(null);
 mainWindow.pack();
 mainWindow.setVisible(true);
    }

    public void CAS_Interface()
    {
 setPreferredSize(new Dimension(600,471));
 setBackground(new Color(173,216,230));
 addMouseListener(this);
 theCAS_Engine = new CAS_Engine();
 running = true;
 repaint();
    }

    public void paintComponent(Graphics g)
    {
 super.paintComponent(g);
 if (running) {
 drawScreen((Graphics2D) g);
 }
    }

    public void drawScreen(Graphics2D g)
    {
 //Uses the game board as defined in the program specification
 Image image = Toolkit.getDefaultToolkit().getImage("./map.png");
 g.drawImage(image, 0,0,this);

 // Creates the custom buttons: "New Game", "Play AI", Enter Names,
 // Change Colours and Leave Game

 // Start of custom buttons
 g.setColor(new Color(0,191,255));
 g.fillRect(450, 25, 150, 30);
 g.fillRect(450, 405, 150, 30);
 g.fillRect(450, 80, 150, 30);
 g.fillRect(450, 135, 150, 30);
 g.fillRect(450, 190, 150, 30);

 g.setColor(new Color(50,241,255));
 g.drawRect(450, 25, 150, 30);
 g.drawRect(450, 80, 150, 30);
 g.drawRect(450, 135, 150, 30);
 g.drawRect(450, 190, 150, 30);
 g.drawRect(450, 405, 150, 30);

 g.setColor(new Color(0,0,205));
 g.setFont(new Font("Times New Roman",Font.BOLD, 16));
 g.drawString("New Game", 460, 45);
 g.drawString("Play AI", 460, 100);
 g.drawString("Enter Names", 460, 155);
 g.drawString("Change Colours", 460, 210);
 g.drawString("Leave Game", 460, 426);
 //End of custom buttons

 //This checks to see what moves have been made and by who
 //start of procedure
 for(int i = 1; i<17;i++)
 {
     System.out.println(theCAS_Engine.getSpotInformation(i));
     if(! (theCAS_Engine.getSpotInformation(i) == 0))
     {
  //Find the colour of the player who choose that spot
 
g.setColor(theCAS_Engine.getPlayersColor(theCAS_Engine.getSpotInformation(i)
== 1 ));

  //Fill in the appropiate spot
  if(i == 1)
  {
      g.fillOval(2,62,12,12);
  }
  else if(i == 2)
  {
      g.fillOval(250,4,12,12);
  }
  else if(i == 3)
  {
      g.fillOval(416,121,12,12);
  }
  else if(i == 4)
  {
      g.fillOval(124,213,12,12);
  }
  else if(i == 5)
  {
      g.fillOval(102,139,12,12);
  }
  else if(i == 6)
  {
      g.fillOval(223,106,12,12);
  }
  else if(i == 7)
  {
      g.fillOval(297,172,12,12);
  }
  else if(i == 8)
  {
      g.fillOval(166,213,12,12);
  }
  else if(i == 9)
  {
      g.fillOval(106,248,12,12);
  }
  else if(i == 10)
  {
      g.fillOval(222,212,12,12);
  }
  else if(i == 11)
  {
      g.fillOval(290,286,12,12);
  }
  else if(i == 12)
  {
      g.fillOval(168,329,12,12);
  }
  else if(i == 13)
  {
      g.fillOval(31,284,12,12);
  }
  else if(i == 14)
  {
      g.fillOval(245,214,12,12);
  }
  else if(i == 15)
  {
      g.fillOval(380,354,12,12);
  }
  else if(i == 16)
  {
      g.fillOval(137,455,12,12);
  }
     }
 }

 //If the game is finished then display the winner

 //Start of game Finished
 if(theCAS_Engine.getisTheGameFinished())
 {
     //Place a transparent blanket over the board
     AlphaComposite ac =
AlphaComposite.getInstance(AlphaComposite.SRC_OVER,0.5f);
     g.setComposite(ac);
     g.setColor(Color.blue);
     g.fillRect(0,0,432,471);

     //Turn the transparency off for the displaying of the winner
information
     ac = AlphaComposite.getInstance(AlphaComposite.SRC_OVER,1.0f);
     g.setComposite(ac);
     g.setColor(Color.green);
     g.setFont(new Font("Times New Roman",Font.BOLD, 32));
     g.drawString("Game Over", 150, 200);

  //Check who won and display there name in there colour
  switch(theCAS_Engine.checkWon())
  {
      case 0:
   g.drawString("No Winner!", 145, 250);
   break;
      case 1:
   g.setColor(theCAS_Engine.getPlayersColor(true));
   g.drawString(theCAS_Engine.getPlayersName(true) + " Wins!", 130,
250);
   break;
      case 2:
   g.setColor(theCAS_Engine.getPlayersColor(false));
   //Check if player 2 was the AI
   if(theCAS_Engine.getisAIPlaying())
   {
       g.drawString("AI WINS!!!", 130, 250);
   }
   else
   {
       g.drawString(theCAS_Engine.getPlayersName(false) + " Wins!",
130, 250);
   }
  }
  //End of Game Finished
 }

}


Since all the code isn't here we can't compile it so it is very
difficult to know what is actually causing your problem. I can tell you
this, that calling Toolkit.getImage() in the paintComponent() method is
not a good idea. Whether that can cause it to not draw I don't know.
Speaking of that, createImage() is preferred over getImage() as
getImage() causes the image to be cached. If you are using a modern
compiler, 1.4 or later, then you should use ImageIO class methods to
load images.

I do have a question, why do you create a JPanel to add this JPanel to
and set that panel as the content pane rather than just adding this
JPanel to the JFrame?

--

Knute Johnson
email s/nospam/linux/

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