/* ComPanel.java */

package ciips.animation;

import java.awt.*;
import java.applet.*;
import java.io.*;


/**
 * Commentary panel, which only consists of a few rows of texts in the form
 * of <code>java.awt.Label</code>.
 * The number of text labels are set during the class construction.
 * <p>
 * In this particular implemetation, the commentary panel is displayed as
 * the footer of the window frame.
 * @see AlgAnimFrame
 */
public class ComPanel extends Panel {

  private Label[] com;
	private static final boolean DEBUG = true;

  /**
   * Creates a commentary panel based on the initial comment and number
   * of text fields specified by the parameters.
   * @param s Normally the algorithm's name. This parameter will be
   * displayed on the first line of the text fields as "Running " + s.
   * @param n_lines The number of text fields to be created on this
   * commentary panel.
   */
  public ComPanel( String s, int n_lines ) {
		if ( DEBUG ) System.out.println("ComPanel " + n_lines + " lines");
		com = new Label[n_lines];
		setLayout(new GridLayout(0,1));
    int i;
    this.setBackground(Color.white);
    for (i=0;i<n_lines;i++) {
      com[i] = new Label();
	    com[i].setBackground(Color.white);
      add( com[i] );
      }
    // com[0].setText("Running " + s );
    }

    /**
     * This method set the text string on the text label specified by the
     * parameters.
     * @param line The text label to display the text string. The first one
     * starts from 0.
     * @param s The text string to be displayed.
     */
  public void setText( int line, String s ) {
		if (line < com.length ) com[line].setText( s );
    }

	public void setTopText( int line, String s ) {
		setText( line, s );
		line++;
		while( line < com.length ) setText( line++, "" );
		}
}