public function sizeText($text)
    {
        // Try to guess how many lines the text will take up in the dialog. This is difficult because long lines are
        // wrapped. So what I'll do is pre-wrap the text and then just look at the number of lines it takes up
        $columns = $this->_screenWidth - $this->_borderWidth - $this->_columnSpacer;

        // Dialog do not add litteral newline at text begin like whiptail do, so we must add it manually
        if ($this->_program == 'dialog') {
            $text = "\n$text";
        }

        $encodingProgPath = realpath(__DIR__ . '/../bin/encoding.pl');
        $text = shell_exec("$encodingProgPath wrap " . escapeshellarg($text) . ' ' . $columns);
        $lines = explode("\n", $text);

        // Now figure out what's the longest line. Use perl Text::CharWidth module for that purpose
        $windowColumns = shell_exec("$encodingProgPath width " . escapeshellarg($this->_title)) + $this->_titleSpacer;

        array_map(
            function($_) use(&$windowColumns, $encodingProgPath)
            {
                $w = shell_exec("$encodingProgPath width " . escapeshellarg($_));

                if ($w > $windowColumns) {
                    $windowColumns = $w;
                }
            },

            $lines
        );

        return array($text, count($lines) + 1 + $this->_borderHeight, $windowColumns + $this->_borderWidth);
    }