import java.awt.*;
import java.applet.*;
import java.net.*;

public class CardShow extends Applet
{
  // Suites
  Choice suites = new Choice ();

  // Values
  Choice values = new Choice ();

  // Current card selection
  Label cardSelection = new Label ();

  // Picture Frame
  PictureFrame pictureFrame = new PictureFrame (this, 100, 100);

  // Initialize my applet
  public void init ()
    {
      // Initialize the suites      
      initSuites ();

      // Initialize the values       
      initValues ();

      // set the selection string
      setCardSelection ();

      //
      // Add all the GUI items
      //

      // Add the choice objects
      add (suites);
      add (values);
      
      // Add the label
      add (cardSelection);

      // Add picture frame
      add ("Center", pictureFrame);
    }

  public boolean action (Event event, Object what)
    {
      // If the action was on the suites or values choice objects
      if (event.target == suites || event.target == values)
        {
          // reset the card selection
          setCardSelection ();
        }

      return true;
    }

  private void setCardSelection ()
    {
      //
      // Get the strings from the choices
      //
      
      // Get the suit
      String suit = suites.getSelectedItem ();

      // Get the value
      String value = values.getSelectedItem ();
      
      // Reset the label
      cardSelection.setText (suit + " " + value);      
      
      // Redraw the picture
      pictureFrame.repaint ();
    }

  private void initSuites ()
    {
      // Add the suites
      suites.addItem ("Spades");
      suites.addItem ("Clubs");
      suites.addItem ("Diamonds");
      suites.addItem ("Hearts");      
    }

  private void initValues ()
    {
      // Add the values
      values.addItem ("2");
      values.addItem ("3");
      values.addItem ("4");
      values.addItem ("5");
      values.addItem ("6");
      values.addItem ("7");
      values.addItem ("8");
      values.addItem ("9");
      values.addItem ("10");
      values.addItem ("Jack");
      values.addItem ("Queen");
      values.addItem ("King");
      values.addItem ("Ace");
    }

  private char suitToFilename (String suit)
    {
      //
      // Conversion from suit string to suit part of filename
      //
      
      // Grab the first character and lower case it
      return Character.toLowerCase (suit.charAt (0));
    }

  private char valueToFilename (String value)
    {
      //
      // Conversion from value string to value part of filename
      //

      // Grab the first character
      char firstChar = value.charAt (0);

      // Lowercase the colored cards
      switch (firstChar)
        {
        case 'J':
        case 'Q':
        case 'K':
        case 'A':
          firstChar = Character.toLowerCase (firstChar);
        }

      // Special case for value 10
      if (firstChar == '1')
        {
          firstChar = 't';
        }

      //
      // All others values (2 through 9) do not need any conversions
      //

      return firstChar;
    }

  public String filename ()
    {
      // Get the suit
      String suit = suites.getSelectedItem ();

      // Get the value
      String value = values.getSelectedItem ();
      
      // Get the character for the suit
      char s = suitToFilename (suit);

      // Get the character for the value
      char v = valueToFilename (value);
      
      // Make the name of the image
      String imageName = 
        "images/" +
        String.valueOf (v) +
        String.valueOf (s) +        
        ".gif";

      // Return the image name
      return imageName;
      
    }
}

class PictureFrame extends Canvas
{
  // Reference to the CardShow object
  CardShow cardShow;

  PictureFrame (CardShow c, int width, int height)
    {
      // Remember the reference 
      cardShow = c;

      // Resize self
      resize (width, height);

      // Repaint
      repaint ();
    }
  
  public void update (Graphics graphics) 
    {
      displayImage (graphics);
    }

  public void paint (Graphics graphics) 
    {
      displayImage (graphics);
    }

  private void displayImage (Graphics graphics) 
    {
      // Get the selected card's filename
      String filename = cardShow.filename ();

      // Try to get the image from the server where the file came from
      try 
        {
          // Create a URL object for the image file
          URL url = new URL (cardShow.getCodeBase () + filename);

          // Get the image
          Image image = Toolkit.getDefaultToolkit ().getImage (url);

          // Get the width of the image
          int imageWidth = image.getWidth (this);

          // Get the height of the image
          int imageHeight = image.getHeight (this);

          // Get the width of the canvas
          int myWidth = bounds ().width;

          // Get the height of the canvas
          int myHeight = bounds ().height;
          
          // Starting width of the image
          int startingWidthOfImage = (myWidth - imageWidth) / 2;

          // Starting height of the image
          int startingHeightOfImage = (myHeight - imageHeight) / 2;

          // Draw the image
          graphics.drawImage (image,
                              startingWidthOfImage,
                              startingHeightOfImage,
                              this);
        }

      // Catch any exceptions raised during downloading the images
      catch (Exception exce)
        {
          // nothing
        }
    }
}