<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
 * Contains Relation_Stats_Pdf class
 *
 * @package PhpMyAdmin
 */
if (! defined('PHPMYADMIN')) {
	exit;
}

require_once 'libraries/plugins/schema/RelationStats.class.php';

/**
 * 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 PDF document.
 *
 * @name	Relation_Stats_Pdf
 * @package PhpMyAdmin
 * @see		PMA_Schema_PDF::SetDrawColor, PMA_Schema_PDF::setLineWidthScale,
 *			PMA_Schema_PDF::lineScale
 */
class Relation_Stats_Pdf extends RelationStats
{
	/**
	 * The "Relation_Stats_Pdf" constructor
	 *
	 * @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 $foreign_field The relation field in the foreign table
	 */
	function __construct($master_table, $master_field, $foreign_table,
		$foreign_field
	) {
		$this->wTick = 5;
		parent::__construct(
			$master_table, $master_field, $foreign_table, $foreign_field
		);
	}

	/**
	 * draws relation links and arrows shows foreign key relations
	 *
	 * @param boolean $showColor Whether to use one color per relation or not
	 * @param integer $i		 The id of the link to draw
	 *
	 * @global object $pdf The current PDF document
	 *
	 * @access public
	 *
	 * @return void
	 *
	 * @see PMA_Schema_PDF
	 */
	public function relationDraw($showColor, $i)
	{
		global $pdf;

		if ($showColor) {
			$d = $i % 6;
			$j = ($i - $d) / 6;
			$j = $j % 4;
			$j++;
			$case = array(
				array(1, 0, 0),
				array(0, 1, 0),
				array(0, 0, 1),
				array(1, 1, 0),
				array(1, 0, 1),
				array(0, 1, 1)
			);
			list ($a, $b, $c) = $case[$d];
			$e = (1 - ($j - 1) / 6);
			$pdf->SetDrawColor($a * 255 * $e, $b * 255 * $e, $c * 255 * $e);
		} else {
			$pdf->SetDrawColor(0);
		}
		$pdf->setLineWidthScale(0.2);
		$pdf->lineScale(
			$this->xSrc,
			$this->ySrc,
			$this->xSrc + $this->srcDir * $this->wTick,
			$this->ySrc
		);
		$pdf->lineScale(
			$this->xDest + $this->destDir * $this->wTick,
			$this->yDest,
			$this->xDest,
			$this->yDest
		);
		$pdf->setLineWidthScale(0.1);
		$pdf->lineScale(
			$this->xSrc + $this->srcDir * $this->wTick,
			$this->ySrc,
			$this->xDest + $this->destDir * $this->wTick,
			$this->yDest
		);
		/*
		 * Draws arrows ->
		*/
		$root2 = 2 * sqrt(2);
		$pdf->lineScale(
			$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
		);
		$pdf->lineScale(
			$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
		);

		$pdf->lineScale(
			$this->xDest + $this->destDir * $this->wTick / 2,
			$this->yDest,
			$this->xDest + $this->destDir * (0.5 + 1 / $root2) * $this->wTick,
			$this->yDest + $this->wTick / $root2
		);
		$pdf->lineScale(
			$this->xDest + $this->destDir * $this->wTick / 2,
			$this->yDest,
			$this->xDest + $this->destDir * (0.5 + 1 / $root2) * $this->wTick,
			$this->yDest - $this->wTick / $root2
		);
		$pdf->SetDrawColor(0);
	}
}
?>