/*
 *  File: DrawableString.java
 *
 *  A DrawableString class with centering capability
 *
 *  Copyright:  Northeast Parallel Architectures Center
 * 
 */

import java.awt.*;

public class DrawableString extends Font {

  private String string;
  private Color color;
  
  // Does it make sense to have a no-arg constructor?
  public DrawableString() {
    super( "SansSerif", Font.BOLD, 18 );
    this.string = "";
    this.color = Color.black;
  }
  
  public DrawableString( String string ) {
    this();
    this.string = string;
  }
  
  public String getString() { return this.string; }
  public void setString( String string ) {
    this.string  = string ;
  }
  
  public Color getColor() { return this.color; }
  public void setColor( Color color ) {
    this.color = color;
  }
  
  // Variables name, style, and size are inherited from Font:
  public void setFontName( String name ) {
    this.name = name;
  }
  public void setFontStyle( int style ) {
    this.style = style;
  }
  public void setFontSize( int size ) {
    this.size = size;
  }
  
  // These methods are for compatibility with DrawablePolygon:
  public void draw( Graphics g, int x, int y ) {
    g.drawString( this.string, x, y );
  }
  public void draw( Component c, int x, int y ) {
    this.draw( c.getGraphics(), x, y );
  }
  public void fill( Graphics g, int x, int y ) {
    this.draw( g, x, y );
  }
  public void fill( Component c, int x, int y ) {
    this.fill( c.getGraphics(), x, y );
  }
  
  // Center this string in the given component:
  public void centerDraw( Component c ) {
  
    if ( this.string == null ) return;

    // Should we restore the previous color?
    if ( this.color != null ) c.setForeground( color );
    
    // Get graphics object for this component:
    Graphics g = c.getGraphics();
    
    // Methods getName(), getStyle(), and getSize() are
    // inherited from Font:
    g.setFont( new Font( getName(), getStyle(), getSize() ) );

    // Get a FontMetrics object:
    FontMetrics fm = g.getFontMetrics();
    
    // Determine the width of the component:
    int componentWidth = c.getSize().width;
    
    // Determine the width of the string:
    int stringWidth = fm.stringWidth( this.string );
    
    // Calculate the x-coordinate of the string:
    int x = ( componentWidth - stringWidth )/2;
    
    // Determine the height of the component:
    int componentHeight = c.getSize().height;
    
    // Calculate the height of *any* string:
    int ascent = fm.getAscent();
    int descent = fm.getDescent();
    int stringHeight = ascent + descent;
    
    // Calculate the y-coordinate of the string:
    int y = ( componentHeight - stringHeight )/2 + ascent;
    
    // Draw the string at point (x,y):
    this.draw( g, x, y );
    
  }
      
}