form.php
public function submitImage(SelectorInterface $selector, $x, $y, $additional = false)
    {
        $additional = $additional ? $additional : array();
        foreach ($this->images as $image) {
            if ($selector->isMatch($image)) {
                $encoding = $this->encode();
                $image->write($encoding, $x, $y);
                if ($additional) {
                    $encoding->merge($additional);
                }

                return $encoding;
            }
        }

        return false;
    }
public function submitImage(SelectorInterface $selector, $x, $y, $additional = false)
    {
        $additional = $additional ? $additional : array();
        foreach ($this->images as $image) {
            if ($selector->isMatch($image)) {
                $encoding = $this->encode();
                $image->write($encoding, $x, $y);
                if ($additional) {
                    $encoding->merge($additional);
                }

                return $encoding;
            }
        }

        return false;
    }
Gets the submit values for an image.

@param $selector Criteria to apply.
@param int $x X-coordinate of click.
@param int $y Y-coordinate of click.
@param hash $additional  Additional data for the form.

@return SimpleEncoding Submitted values or false if there is no such button in the form.