/**
 * @(#) $RCSfile: ClearTextFieldLoop.as,v $ $Revision: 1.13 $ $Date: 2003/01/29 16:40:19 $
 *
 * Copyright 2003 Orgdot AS. All Rights Reserved.
 * http://dev.swfit.com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

/**
 * This loop sets an input text field with an initial value, and clears the field once the
 * user starts typing.
 *
 * Two vars need to be set before the script is embedded: 
 * (which_textfield) and (which_textfield + "text_start"):
 * Example:
 * which_textfield = "display";
 * display_text_start = "type here to test drive fonts";
 *
 * @author      Olaf Havnes
 * @version     $Revision: 1.13 $ $Date: 2003/01/29 16:40:19 $
 * @since       SWFIT1.0
 */
 
// flags
CLEARED = "cleared";
SET = "set";


// do this until the field has been cleared
if ( eval (which_textfield add "_cleared") ne CLEARED )
{
    text_start = eval (which_textfield add "_text_start");

    // do this once
    if ( eval (which_textfield add "_set") ne SET )
    {
        set (which_textfield add "_text", text_start);
        set (which_textfield add "_set", SET)
    }

    // check for changes, and clear the field
    text_now = eval (which_textfield add "_text");
    if (text_start ne text_now)
    {
        if (length (text_now) > length (text_start))
        {
            // did the user add something ?
            // (we assume that the user only had time to add a single character)
            set (which_textfield add "_text", substring (text_now, length(text_now), 1));
            set (which_textfield add "_cleared",  CLEARED)
        }

        else if (length (text_now) < length (text_start))
        {
            // did the user subtract something ?
            // (we assume that the user only had time for a single delete)
            set (which_textfield add "_text", "");
            set (which_textfield add "_cleared", CLEARED)
        }
    }
}