<?php

dl('php_gtk.so');

$interface =& new GladeXML(dirname(__FILE__).'/tempconv.glade');
$interface->signal_autoconnect();

/* start the main loop */
gtk::main();

function on_celsius_clicked($button)
{
    global $interface;

    $t_entry = $interface->get_widget('input_temp');
    $res_label = $interface->get_widget('result');

    /* get contents of the entry field */
    $chars = $t_entry->get_chars(0, -1);
    if (empty($chars) || !is_numeric($chars)) {
        /* if invalid contents, indicate so, reselect entry field and focus on it */
        $res_label->set_text('Invalid input');
    } else {
        /* if valid contents, perform conversion and output result */
        $temp = (((int)$chars)-32)/1.8;
        $res_label->set_text(sprintf("$chars Fahrenheit is %.1f Celsius", $temp));
    }

    $t_entry->select_region(0, -1);
    $t_entry->grab_focus();
}

function on_fahr_clicked($button)
{
    global $interface;

    $t_entry = $interface->get_widget('input_temp');
    $res_label = $interface->get_widget('result');

    $chars = $t_entry->get_chars(0, -1);
    if (empty($chars) || !is_numeric($chars)) {
        /* if invalid contents, indicate so, reselect entry field and focus on it */
        $res_label->set_text('Invalid input');
    } else {
        /* if valid contents, perform conversion and output result */
        $temp = ((int)$chars)*1.8+32;
        $res_label->set_text(sprintf("$chars Celsius is %.1f Fahrenheit", $temp));
    }

    $t_entry->select_region(0, -1);
    $t_entry->grab_focus();
}

function on_exit_clicked($button)
{
    /* exit the main loop */
    gtk::main_quit();
}

?>