eatregularly-bodycomp/index.php

<?php
/*
Plugin Name: Body Composition Change Calculator
Plugin URI: http://code.eatregularly.com/wordpress/eatregularly.com-bodycompcalc.html
Description:  Using Elia's K(i) values for metabolic rate, display the net caloric difference between two different body compositions.  This calculator can be inserted either into the sidebar from the Appearance menu or into any post by placing [eatregularly.com_bodycomp_calculator] in the content ( but not both, please ).
Author: eatregularly.com
Version: 1.0
Author URI: http://www.eatregularly.com
License: GNU GPL see http://www.gnu.org/licenses/licenses.html#GPL
*/

class eatregularlydotcom_bodycomp_calculator {


        function bodycomp_calculator_init() {
                $class_name = 'eatregularlydotcom_bodycomp_calculator';
        $calc_title = 'Body Compostiton Calculator';
        $calc_desc = 'Calculates the caloric difference between two body composition profiles.';

        if (!function_exists('wp_register_sidebar_widget')) return;

        wp_register_sidebar_widget(
            $class_name,
            $calc_title,
            array($class_name, 'bodycomp_calculator_widget'),
            array(
                'classname' => $class_name,
                'description' => $calc_desc
            )
        ); // wp_register_sidebar_widget

        wp_register_widget_control(
            $class_name,
            $calc_title,
            array($class_name, 'bodycomp_calculator_control'),
            array('width' => '100%')
        ); // wp_register_widget_congrol

        add_shortcode(
            $class_name,
            array($class_name, 'bodycomp_calculator_shortcode')
        ); // add_shortcode

        } // function bodycomp_calc_init


        function display($is_widget, $args=array()) {
                if ($is_widget) {
                        extract($args);
                        $options = get_option('eatregularlydotcom_bodycomp_calculator');
                        $title = $options['title'];
                        $output[] = $before_widget . $before_title . $title . $after_title;
                } // if $is_widget

                $output[] = '<div style="margin-top:5px;">
<table><caption>Body Composition Change Calculator</caption>
<form>

<tr>
<td>
<label for="cpound">Weight (pounds)</label>
<input type="number" id="cpound" name="cpound" value="220">
</td>
</tr>

<tr>
<td>
<fieldset>
<legend>Starting Composition</legend>
<label for="cbeforebfpct">Body Fat (%)</label>
<input type="number" id="cbeforebfpct" name="cbeforebfpct" value="25">
<br>
<label for="cbeforesmpct">Skeletal Muscle (%)</label>
<input type="number" id="cbeforesmpct" name="cbeforesmpct" value="35">
</fieldset>
<fieldset>
<legend>Ending Composition</legend>
<label for="cendbfpct">Body Fat (%)</label>
<input type="number" id="cendbfpct" name="cendbfpct" value="20">
<br>
<label for="cendsmpct">Skeletal Muscle (%)</label>
<input type="number" id="cendsmpct" name="cendsmpct" value="40">
</fieldset>
<input type="button" value="Calculate" onclick="bodycompcalc()">
</td>
</tr>

<tr>
<td>
<div id="coutput"></div>
</td>
</tr>

</form>
</table>

                </div>';
        $output[] = $after_widget;
                return join($output, "\n");

        } // function display


        function bodycomp_calculator_control() {
                $class_name = 'eatregularlydotcom_bodycomp_calculator';
                $calc_title = 'Body Compostiton Calculator';

                $options = get_option($class_name);

                if (!is_array($options)) $options = array('title'=>$calc_title);

                if ($_POST[$class_name.'_submit']) {
                $options['title'] = strip_tags(stripslashes($_POST[$class_name.'_title']));
                update_option($class_name, $options);
                } // if

                $title = htmlspecialchars($options['title'], ENT_QUOTES);

                echo '<p>Title: <input style="width: 180px;" name="'.$class_name.'_title" type="text" value="'.$title.'" /></p>';
                echo '<input type="hidden" name="'.$class_name.'_submit" value="1" />';
        } // function bodycomp_calculator_control


        function bodycomp_calculator_shortcode($args, $content=null) {
                wp_enqueue_script('bodycomp-script', plugins_url('bodycomp.js', __FILE__), false, false, false);
        return eatregularlydotcom_bodycomp_calculator::display(false, $args);
        } // function bodycomp_calculator_shortcode


        function bodycomp_calculator_widget($args) {
                wp_enqueue_script('bodycomp-script', plugins_url('bodycomp.js', __FILE__), false, false, false);
                echo eatregularlydotcom_bodycomp_calculator::display(true, $args);
        } // function bodycomp_calculator_widget


} // class eatregularlydotcom_bodycomp_calculator

add_action('widgets_init', array('eatregularlydotcom_bodycomp_calculator', 'bodycomp_calculator_init'));


?>