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<?php
/**
* Contains PhpMyAdmin\Plugins\Schema\Eps\RelationStatsEps class
*/
declare(strict_types=1);
namespace PhpMyAdmin\Plugins\Schema\Eps;
use PhpMyAdmin\Plugins\Schema\RelationStats;
use function sqrt;
/**
* Relation preferences/statistics
*
* This class fetches the table master and foreign fields positions
* and helps in generating the Table references and then connects
* master table's master field to foreign table's foreign key
* in EPS document.
*
* @see Eps
*
* @name RelationStatsEps
*/
class RelationStatsEps extends RelationStats
{
/**
* @param Eps $diagram The EPS diagram
* @param string $master_table The master table name
* @param string $master_field The relation field in the master table
* @param string $foreign_table The foreign table name
* @param string $foreign_field The relation field in the foreign table
*/
public function __construct(
$diagram,
$master_table,
$master_field,
$foreign_table,
$foreign_field
) {
$this->wTick = 10;
parent::__construct(
$diagram,
$master_table,
$master_field,
$foreign_table,
$foreign_field
);
$this->ySrc += 10;
$this->yDest += 10;
}
/**
* draws relation links and arrows
* shows foreign key relations
*
* @see Eps
*
* @return void
*/
public function relationDraw()
{
// draw a line like -- to foreign field
$this->diagram->line(
$this->xSrc,
$this->ySrc,
$this->xSrc + $this->srcDir * $this->wTick,
$this->ySrc,
1
);
// draw a line like -- to master field
$this->diagram->line(
$this->xDest + $this->destDir * $this->wTick,
$this->yDest,
$this->xDest,
$this->yDest,
1
);
// draw a line that connects to master field line and foreign field line
$this->diagram->line(
$this->xSrc + $this->srcDir * $this->wTick,
$this->ySrc,
$this->xDest + $this->destDir * $this->wTick,
$this->yDest,
1
);
$root2 = 2 * sqrt(2);
$this->diagram->line(
$this->xSrc + $this->srcDir * $this->wTick * 0.75,
$this->ySrc,
$this->xSrc + $this->srcDir * (0.75 - 1 / $root2) * $this->wTick,
$this->ySrc + $this->wTick / $root2,
1
);
$this->diagram->line(
$this->xSrc + $this->srcDir * $this->wTick * 0.75,
$this->ySrc,
$this->xSrc + $this->srcDir * (0.75 - 1 / $root2) * $this->wTick,
$this->ySrc - $this->wTick / $root2,
1
);
$this->diagram->line(
$this->xDest + $this->destDir * $this->wTick / 2,
$this->yDest,
$this->xDest + $this->destDir * (0.5 + 1 / $root2) * $this->wTick,
$this->yDest + $this->wTick / $root2,
1
);
$this->diagram->line(
$this->xDest + $this->destDir * $this->wTick / 2,
$this->yDest,
$this->xDest + $this->destDir * (0.5 + 1 / $root2) * $this->wTick,
$this->yDest - $this->wTick / $root2,
1
);
}
}