package extensions.awt;
import java.awt.*;
import java.util.*;
import extensions.util.*;

/**
  * Create a multi-line label.
  *
  * @see java.awt.Label
  * @version 1.0.2
  * @author John Webster Small
  */
public class LabelPanel extends Panel
{

  /** Left aligns message text. */
  public static final int LEFT = Label.LEFT;

  /** Centers message text. */
  public static final int CENTER = Label.CENTER;

  /** Right aligns message text. */
  public static final int RIGHT = Label.RIGHT;

  /** Default line delimiters. */
  public static final String delimDefault = "\n";

  /** Horizonal pixel gap between label and container. */
  public static int hgap = 10;

  /** Vertical pixel gap between labels. */
  public static int vgap = 0;

  /**
    * Constructs a new multi-line label.
    * @param lines enumeration of lines
    * @param alignment the alignment value
    */
  public LabelPanel(Enumeration lines, int alignment)
  {
    GridBagLayout gridbag = new GridBagLayout();
    GridBagConstraints c = new GridBagConstraints();
    setLayout(gridbag);
    c.fill = GridBagConstraints.NONE;
    c.gridwidth = GridBagConstraints.REMAINDER;
    switch (alignment)  {
      case RIGHT:
        c.anchor = GridBagConstraints.EAST;
        break;
      case CENTER:
        c.anchor = GridBagConstraints.CENTER;
        break;
      case LEFT:
      default:
        c.anchor = GridBagConstraints.WEST;
    }
    Label l;
    for (int i = 0; lines.hasMoreElements(); i++)  {
      if (i == 0) // first
        c.insets = new Insets(vgap,hgap,vgap,hgap);
      else // all but first
        c.insets = new Insets(0,hgap,vgap,hgap);
      l = new Label((String)lines.nextElement());
      gridbag.setConstraints(l, c);
      add(l);
    }
    validate();
  }

  /**
    * Constructs a new multi-line label.
    * @param msg the String that contains multiple lines
    * @param alignment the alignment value
    * @param delim line delimiters
    */
  public LabelPanel(String msg, int alignment, String delim)
    { this(new StringTokenizer(msg,delim),alignment); }

  /**
    * Constructs a new multi-line label.
    * @param msg the String that contains multiple lines
    * @param alignment the alignment value
    */
  public LabelPanel(String msg, int alignment)
    { this(msg,alignment,delimDefault); }

  /**
    * Constructs a new multi-line label.
    * @param msg the String that contains multiple lines
    * @param alignment the alignment value
    * @param delim line delimiters
    */
  public LabelPanel(String msg, String delim)
    { this(msg,LEFT,delim); }

  /**
    * Constructs a new multi-line label.
    * @param msg the String that contains multiple lines
    */
  public LabelPanel(String msg)
    { this(msg,LEFT,delimDefault); }

  /** Set the font for all lines. */
  public void setFont(Font f)
  {
    validate();
    super.setFont(f);
    Component[] c = getComponents();
    for (int i = 0; i < c.length; i++)
      c[i].setFont(f);
    validate();
  }
}