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409
#pma/libraries/gis/GISMultipoint.php
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409
#pma/libraries/gis/GISMultipoint.php
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<?php
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/* vim: set expandtab sw=4 ts=4 sts=4: */
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/**
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* Handles actions related to GIS MULTIPOINT objects
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*
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* @package PhpMyAdmin-GIS
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*/
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namespace PMA\libraries\gis;
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use \TCPDF;
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/**
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* Handles actions related to GIS MULTIPOINT objects
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*
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* @package PhpMyAdmin-GIS
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*/
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class GISMultipoint extends GISGeometry
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{
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// Hold the singleton instance of the class
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private static $_instance;
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/**
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* A private constructor; prevents direct creation of object.
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*
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* @access private
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*/
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private function __construct()
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{
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}
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/**
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* Returns the singleton.
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*
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* @return GISMultipoint the singleton
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* @access public
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*/
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public static function singleton()
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{
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if (!isset(self::$_instance)) {
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$class = __CLASS__;
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self::$_instance = new $class;
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}
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return self::$_instance;
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}
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/**
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* Scales each row.
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*
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* @param string $spatial spatial data of a row
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*
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* @return array an array containing the min, max values for x and y coordinates
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* @access public
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*/
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public function scaleRow($spatial)
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{
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// Trim to remove leading 'MULTIPOINT(' and trailing ')'
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$multipoint
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= mb_substr(
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$spatial,
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11,
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mb_strlen($spatial) - 12
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);
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return $this->setMinMax($multipoint, array());
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}
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/**
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* Adds to the PNG image object, the data related to a row in the GIS dataset.
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*
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* @param string $spatial GIS MULTIPOINT object
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* @param string $label Label for the GIS MULTIPOINT object
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* @param string $point_color Color for the GIS MULTIPOINT object
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* @param array $scale_data Array containing data related to scaling
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* @param object $image Image object
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*
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* @return object the modified image object
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* @access public
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*/
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public function prepareRowAsPng(
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$spatial,
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$label,
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$point_color,
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$scale_data,
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$image
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) {
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// allocate colors
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$black = imagecolorallocate($image, 0, 0, 0);
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$red = hexdec(mb_substr($point_color, 1, 2));
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$green = hexdec(mb_substr($point_color, 3, 2));
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$blue = hexdec(mb_substr($point_color, 4, 2));
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$color = imagecolorallocate($image, $red, $green, $blue);
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// Trim to remove leading 'MULTIPOINT(' and trailing ')'
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$multipoint
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= mb_substr(
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$spatial,
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11,
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mb_strlen($spatial) - 12
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);
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$points_arr = $this->extractPoints($multipoint, $scale_data);
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foreach ($points_arr as $point) {
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// draw a small circle to mark the point
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if ($point[0] != '' && $point[1] != '') {
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imagearc($image, $point[0], $point[1], 7, 7, 0, 360, $color);
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}
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}
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// print label for each point
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if ((isset($label) && trim($label) != '')
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&& ($points_arr[0][0] != '' && $points_arr[0][1] != '')
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) {
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imagestring(
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$image,
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1,
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$points_arr[0][0],
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$points_arr[0][1],
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trim($label),
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$black
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);
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}
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return $image;
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}
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/**
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* Adds to the TCPDF instance, the data related to a row in the GIS dataset.
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*
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* @param string $spatial GIS MULTIPOINT object
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* @param string $label Label for the GIS MULTIPOINT object
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* @param string $point_color Color for the GIS MULTIPOINT object
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* @param array $scale_data Array containing data related to scaling
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* @param TCPDF $pdf TCPDF instance
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*
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* @return TCPDF the modified TCPDF instance
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* @access public
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*/
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public function prepareRowAsPdf(
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$spatial,
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$label,
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$point_color,
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$scale_data,
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$pdf
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) {
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// allocate colors
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$red = hexdec(mb_substr($point_color, 1, 2));
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$green = hexdec(mb_substr($point_color, 3, 2));
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$blue = hexdec(mb_substr($point_color, 4, 2));
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$line = array('width' => 1.25, 'color' => array($red, $green, $blue));
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// Trim to remove leading 'MULTIPOINT(' and trailing ')'
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$multipoint
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= mb_substr(
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$spatial,
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11,
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mb_strlen($spatial) - 12
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);
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$points_arr = $this->extractPoints($multipoint, $scale_data);
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foreach ($points_arr as $point) {
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// draw a small circle to mark the point
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if ($point[0] != '' && $point[1] != '') {
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$pdf->Circle($point[0], $point[1], 2, 0, 360, 'D', $line);
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}
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}
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// print label for each point
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if ((isset($label) && trim($label) != '')
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&& ($points_arr[0][0] != '' && $points_arr[0][1] != '')
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) {
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$pdf->SetXY($points_arr[0][0], $points_arr[0][1]);
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$pdf->SetFontSize(5);
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$pdf->Cell(0, 0, trim($label));
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}
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return $pdf;
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}
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/**
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* Prepares and returns the code related to a row in the GIS dataset as SVG.
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*
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* @param string $spatial GIS MULTIPOINT object
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* @param string $label Label for the GIS MULTIPOINT object
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* @param string $point_color Color for the GIS MULTIPOINT object
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* @param array $scale_data Array containing data related to scaling
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*
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* @return string the code related to a row in the GIS dataset
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* @access public
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*/
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public function prepareRowAsSvg($spatial, $label, $point_color, $scale_data)
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{
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$point_options = array(
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'name' => $label,
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'class' => 'multipoint vector',
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'fill' => 'white',
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'stroke' => $point_color,
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'stroke-width' => 2,
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);
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// Trim to remove leading 'MULTIPOINT(' and trailing ')'
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$multipoint
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= mb_substr(
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$spatial,
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11,
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mb_strlen($spatial) - 12
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);
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$points_arr = $this->extractPoints($multipoint, $scale_data);
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$row = '';
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foreach ($points_arr as $point) {
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if ($point[0] != '' && $point[1] != '') {
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$row .= '<circle cx="' . $point[0] . '" cy="'
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. $point[1] . '" r="3"';
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$point_options['id'] = $label . rand();
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foreach ($point_options as $option => $val) {
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$row .= ' ' . $option . '="' . trim($val) . '"';
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}
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$row .= '/>';
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}
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}
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return $row;
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}
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/**
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* Prepares JavaScript related to a row in the GIS dataset
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* to visualize it with OpenLayers.
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*
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* @param string $spatial GIS MULTIPOINT object
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* @param int $srid Spatial reference ID
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* @param string $label Label for the GIS MULTIPOINT object
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* @param string $point_color Color for the GIS MULTIPOINT object
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* @param array $scale_data Array containing data related to scaling
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*
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* @return string JavaScript related to a row in the GIS dataset
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* @access public
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*/
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public function prepareRowAsOl(
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$spatial,
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$srid,
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$label,
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$point_color,
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$scale_data
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) {
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$style_options = array(
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'pointRadius' => 3,
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'fillColor' => '#ffffff',
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'strokeColor' => $point_color,
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'strokeWidth' => 2,
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'label' => $label,
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'labelYOffset' => -8,
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'fontSize' => 10,
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);
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if ($srid == 0) {
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$srid = 4326;
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}
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$result = $this->getBoundsForOl($srid, $scale_data);
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// Trim to remove leading 'MULTIPOINT(' and trailing ')'
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$multipoint
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= mb_substr(
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$spatial,
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11,
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mb_strlen($spatial) - 12
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);
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$points_arr = $this->extractPoints($multipoint, null);
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$result .= 'vectorLayer.addFeatures(new OpenLayers.Feature.Vector('
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. 'new OpenLayers.Geometry.MultiPoint('
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. $this->getPointsArrayForOpenLayers($points_arr, $srid)
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. '), null, ' . json_encode($style_options) . '));';
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return $result;
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}
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/**
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* Generate the WKT with the set of parameters passed by the GIS editor.
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*
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* @param array $gis_data GIS data
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* @param int $index Index into the parameter object
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* @param string $empty Multipoint does not adhere to this
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*
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* @return string WKT with the set of parameters passed by the GIS editor
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* @access public
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*/
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public function generateWkt($gis_data, $index, $empty = '')
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{
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$no_of_points = isset($gis_data[$index]['MULTIPOINT']['no_of_points'])
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? $gis_data[$index]['MULTIPOINT']['no_of_points'] : 1;
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if ($no_of_points < 1) {
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$no_of_points = 1;
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}
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$wkt = 'MULTIPOINT(';
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for ($i = 0; $i < $no_of_points; $i++) {
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$wkt .= ((isset($gis_data[$index]['MULTIPOINT'][$i]['x'])
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&& trim($gis_data[$index]['MULTIPOINT'][$i]['x']) != '')
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? $gis_data[$index]['MULTIPOINT'][$i]['x'] : '')
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. ' ' . ((isset($gis_data[$index]['MULTIPOINT'][$i]['y'])
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&& trim($gis_data[$index]['MULTIPOINT'][$i]['y']) != '')
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? $gis_data[$index]['MULTIPOINT'][$i]['y'] : '') . ',';
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}
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$wkt
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= mb_substr(
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$wkt,
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0,
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mb_strlen($wkt) - 1
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);
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$wkt .= ')';
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return $wkt;
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}
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/**
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* Generate the WKT for the data from ESRI shape files.
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*
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* @param array $row_data GIS data
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*
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* @return string the WKT for the data from ESRI shape files
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* @access public
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*/
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public function getShape($row_data)
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{
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$wkt = 'MULTIPOINT(';
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for ($i = 0; $i < $row_data['numpoints']; $i++) {
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$wkt .= $row_data['points'][$i]['x'] . ' '
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. $row_data['points'][$i]['y'] . ',';
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}
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$wkt
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= mb_substr(
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$wkt,
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0,
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mb_strlen($wkt) - 1
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);
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$wkt .= ')';
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return $wkt;
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}
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/**
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* Generate parameters for the GIS data editor from the value of the GIS column.
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*
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* @param string $value Value of the GIS column
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* @param integer $index Index of the geometry
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*
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* @return array params for the GIS data editor from the value of the GIS column
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* @access public
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*/
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public function generateParams($value, $index = -1)
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{
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$params = array();
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if ($index == -1) {
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$index = 0;
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$data = GISGeometry::generateParams($value);
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$params['srid'] = $data['srid'];
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$wkt = $data['wkt'];
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} else {
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$params[$index]['gis_type'] = 'MULTIPOINT';
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$wkt = $value;
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}
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// Trim to remove leading 'MULTIPOINT(' and trailing ')'
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$points
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= mb_substr(
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$wkt,
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11,
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mb_strlen($wkt) - 12
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);
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$points_arr = $this->extractPoints($points, null);
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$no_of_points = count($points_arr);
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$params[$index]['MULTIPOINT']['no_of_points'] = $no_of_points;
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for ($i = 0; $i < $no_of_points; $i++) {
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$params[$index]['MULTIPOINT'][$i]['x'] = $points_arr[$i][0];
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$params[$index]['MULTIPOINT'][$i]['y'] = $points_arr[$i][1];
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}
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return $params;
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}
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/**
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* Overridden to make sure that only the points having valid values
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* for x and y coordinates are added.
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*
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* @param array $points_arr x and y coordinates for each point
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* @param string $srid spatial reference id
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*
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* @return string JavaScript for adding an array of points to OpenLayers
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* @access protected
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*/
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protected function getPointsArrayForOpenLayers($points_arr, $srid)
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{
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$ol_array = 'new Array(';
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foreach ($points_arr as $point) {
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if ($point[0] != '' && $point[1] != '') {
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$ol_array .= $this->getPointForOpenLayers($point, $srid) . ', ';
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}
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}
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$olArrayLength = mb_strlen($ol_array);
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if (mb_substr($ol_array, $olArrayLength - 2) == ', ') {
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$ol_array = mb_substr($ol_array, 0, $olArrayLength - 2);
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}
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$ol_array .= ')';
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return $ol_array;
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}
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}
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