protected function buildTemplate(QtiGraphicGapMatchInteraction $interaction, Object $object)
{
$associableHotspots = [];
foreach ($interaction->getAssociableHotspots() as $associableHotspot) {
/** @var AssociableHotspot $associableHotspot */
$associableHotspots[$associableHotspot->getIdentifier()] = QtiCoordinateUtil::convertQtiCoordsToPercentage([$object->getWidth(), $object->getHeight()], explode(',', $associableHotspot->getCoords()), $associableHotspot->getShape());
}
return $associableHotspots;
}
private function transformCoordinates(QtiCoords $coords, $shape, Object $imageObject)
{
$width = $imageObject->getWidth();
$height = $imageObject->getHeight();
$coords = explode(',', $coords);
switch ($shape) {
// rect: left-x, top-y, right-x, bottom-y.
case QtiShape::RECT:
$leftX = round($coords[0] / $width * 100, 2);
$topY = round($coords[1] / $height * 100, 2);
$rightX = round($coords[2] / $width * 100, 2);
$bottomY = round($coords[3] / $height * 100, 2);
$result = [['x' => $leftX, 'y' => $topY], ['x' => $rightX, 'y' => $topY], ['x' => $rightX, 'y' => $bottomY], ['x' => $leftX, 'y' => $bottomY]];
return $result;
case QtiShape::CIRCLE:
// circle: center-x, center-y, radius. Note. When the radius value is a percentage value, user agents
// should calculate the final radius value based on the associated object's width and height. The radius should be the smaller value of the two.
LogService::log('Unable to map QTI `circle` Shape. Mapping it as `rect` instead');
$radius = $coords[2];
$leftX = round(($coords[0] - $radius) / $width * 100, 2);
$topY = round(($coords[1] + $radius) / $height * 100, 2);
$rightX = round(($coords[0] + $radius) / $width * 100, 2);
$bottomY = round(($coords[1] - $radius) / $height * 100, 2);
$result = [['x' => $leftX, 'y' => $topY], ['x' => $rightX, 'y' => $topY], ['x' => $rightX, 'y' => $bottomY], ['x' => $leftX, 'y' => $bottomY]];
return $result;
case QtiShape::POLY:
// poly: x1, y1, x2, y2, ..., xN, yN. The first x and y coordinate pair and the last should be the same to close the polygon.
// When these coordinate values are not the same, user agents should infer an additional coordinate pair to close the polygon.
$result = [];
for ($i = 0; $i < count($coords); $i += 2) {
$result[] = ['x' => round($coords[$i] / $width * 100, 2), 'y' => round($coords[$i + 1] / $height * 100, 2)];
}
return $result;
case QtiShape::ELLIPSE:
default:
LogService::log('Unsupported QTI Shape mapping conversion. Area mapping conversion is ignored');
return [];
}
}
