Viewing file:  GIS_Point.class.php (9.58 KB) -rw-rw-rw-
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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Handles actions related to GIS POINT objects
*
* @package PhpMyAdmin-GIS
*/
if (! defined('PHPMYADMIN')) {
exit;
}
/**
* Handles actions related to GIS POINT objects
*
* @package PhpMyAdmin-GIS
*/
class PMA_GIS_Point extends PMA_GIS_Geometry
{
// Hold the singleton instance of the class
private static $_instance;
/**
* A private constructor; prevents direct creation of object.
*
* @access private
*/
private function __construct()
{
}
/**
* Returns the singleton.
*
* @return PMA_GIS_Point the singleton
* @access public
*/
public static function singleton()
{
if (!isset(self::$_instance)) {
$class = __CLASS__;
self::$_instance = new $class;
}
return self::$_instance;
}
/**
* Scales each row.
*
* @param string $spatial spatial data of a row
*
* @return array an array containing the min, max values for x and y cordinates
* @access public
*/
public function scaleRow($spatial)
{
// Trim to remove leading 'POINT(' and trailing ')'
$point = substr($spatial, 6, (strlen($spatial) - 7));
return $this->setMinMax($point, array());
}
/**
* Adds to the PNG image object, the data related to a row in the GIS dataset.
*
* @param string $spatial GIS POINT object
* @param string $label Label for the GIS POINT object
* @param string $point_color Color for the GIS POINT object
* @param array $scale_data Array containing data related to scaling
* @param resource $image Image object
*
* @return object the modified image object
* @access public
*/
public function prepareRowAsPng($spatial, $label, $point_color,
$scale_data, $image
) {
// allocate colors
$black = imagecolorallocate($image, 0, 0, 0);
$red = hexdec(substr($point_color, 1, 2));
$green = hexdec(substr($point_color, 3, 2));
$blue = hexdec(substr($point_color, 4, 2));
$color = imagecolorallocate($image, $red, $green, $blue);
// Trim to remove leading 'POINT(' and trailing ')'
$point = substr($spatial, 6, (strlen($spatial) - 7));
$points_arr = $this->extractPoints($point, $scale_data);
// draw a small circle to mark the point
if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
imagearc(
$image, $points_arr[0][0], $points_arr[0][1], 7, 7, 0, 360, $color
);
// print label if applicable
if (isset($label) && trim($label) != '') {
imagestring(
$image, 1, $points_arr[0][0],
$points_arr[0][1], trim($label), $black
);
}
}
return $image;
}
/**
* Adds to the TCPDF instance, the data related to a row in the GIS dataset.
*
* @param string $spatial GIS POINT object
* @param string $label Label for the GIS POINT object
* @param string $point_color Color for the GIS POINT object
* @param array $scale_data Array containing data related to scaling
* @param TCPDF $pdf TCPDF instance
*
* @return TCPDF the modified TCPDF instance
* @access public
*/
public function prepareRowAsPdf($spatial, $label, $point_color,
$scale_data, $pdf
) {
// allocate colors
$red = hexdec(substr($point_color, 1, 2));
$green = hexdec(substr($point_color, 3, 2));
$blue = hexdec(substr($point_color, 4, 2));
$line = array('width' => 1.25, 'color' => array($red, $green, $blue));
// Trim to remove leading 'POINT(' and trailing ')'
$point = substr($spatial, 6, (strlen($spatial) - 7));
$points_arr = $this->extractPoints($point, $scale_data);
// draw a small circle to mark the point
if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
$pdf->Circle(
$points_arr[0][0], $points_arr[0][1], 2, 0, 360, 'D', $line
);
// print label if applicable
if (isset($label) && trim($label) != '') {
$pdf->SetXY($points_arr[0][0], $points_arr[0][1]);
$pdf->SetFontSize(5);
$pdf->Cell(0, 0, trim($label));
}
}
return $pdf;
}
/**
* Prepares and returns the code related to a row in the GIS dataset as SVG.
*
* @param string $spatial GIS POINT object
* @param string $label Label for the GIS POINT object
* @param string $point_color Color for the GIS POINT object
* @param array $scale_data Array containing data related to scaling
*
* @return string the code related to a row in the GIS dataset
* @access public
*/
public function prepareRowAsSvg($spatial, $label, $point_color, $scale_data)
{
$point_options = array(
'name' => $label,
'id' => $label . rand(),
'class' => 'point vector',
'fill' => 'white',
'stroke' => $point_color,
'stroke-width'=> 2,
);
// Trim to remove leading 'POINT(' and trailing ')'
$point = substr($spatial, 6, (strlen($spatial) - 7));
$points_arr = $this->extractPoints($point, $scale_data);
$row = '';
if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
$row .= '<circle cx="' . $points_arr[0][0]
. '" cy="' . $points_arr[0][1] . '" r="3"';
foreach ($point_options as $option => $val) {
$row .= ' ' . $option . '="' . trim($val) . '"';
}
$row .= '/>';
}
return $row;
}
/**
* Prepares JavaScript related to a row in the GIS dataset
* to visualize it with OpenLayers.
*
* @param string $spatial GIS POINT object
* @param int $srid Spatial reference ID
* @param string $label Label for the GIS POINT object
* @param string $point_color Color for the GIS POINT object
* @param array $scale_data Array containing data related to scaling
*
* @return string JavaScript related to a row in the GIS dataset
* @access public
*/
public function prepareRowAsOl($spatial, $srid, $label,
$point_color, $scale_data
) {
$style_options = array(
'pointRadius' => 3,
'fillColor' => '#ffffff',
'strokeColor' => $point_color,
'strokeWidth' => 2,
'label' => $label,
'labelYOffset' => -8,
'fontSize' => 10,
);
if ($srid == 0) {
$srid = 4326;
}
$result = $this->getBoundsForOl($srid, $scale_data);
// Trim to remove leading 'POINT(' and trailing ')'
$point = substr($spatial, 6, (strlen($spatial) - 7));
$points_arr = $this->extractPoints($point, null);
if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
$result .= 'vectorLayer.addFeatures(new OpenLayers.Feature.Vector('
. $this->getPointForOpenLayers($points_arr[0], $srid) . ', null, '
. json_encode($style_options) . '));';
}
return $result;
}
/**
* Generate the WKT with the set of parameters passed by the GIS editor.
*
* @param array $gis_data GIS data
* @param int $index Index into the parameter object
* @param string $empty Point deos not adhere to this parameter
*
* @return string WKT with the set of parameters passed by the GIS editor
* @access public
*/
public function generateWkt($gis_data, $index, $empty = '')
{
return 'POINT('
. ((isset($gis_data[$index]['POINT']['x'])
&& trim($gis_data[$index]['POINT']['x']) != '')
? $gis_data[$index]['POINT']['x'] : '')
. ' '
. ((isset($gis_data[$index]['POINT']['y'])
&& trim($gis_data[$index]['POINT']['y']) != '')
? $gis_data[$index]['POINT']['y'] : '') . ')';
}
/**
* Generate the WKT for the data from ESRI shape files.
*
* @param array $row_data GIS data
*
* @return string the WKT for the data from ESRI shape files
* @access public
*/
public function getShape($row_data)
{
return 'POINT(' . (isset($row_data['x']) ? $row_data['x'] : '')
. ' ' . (isset($row_data['y']) ? $row_data['y'] : '') . ')';
}
/**
* Generate parameters for the GIS data editor from the value of the GIS column.
*
* @param string $value of the GIS column
* @param int $index of the geometry
*
* @return array params for the GIS data editor from the value of the GIS column
* @access public
*/
public function generateParams($value, $index = -1)
{
$params = array();
if ($index == -1) {
$index = 0;
$data = PMA_GIS_Geometry::generateParams($value);
$params['srid'] = $data['srid'];
$wkt = $data['wkt'];
} else {
$params[$index]['gis_type'] = 'POINT';
$wkt = $value;
}
// Trim to remove leading 'POINT(' and trailing ')'
$point = substr($wkt, 6, (strlen($wkt) - 7));
$points_arr = $this->extractPoints($point, null);
$params[$index]['POINT']['x'] = $points_arr[0][0];
$params[$index]['POINT']['y'] = $points_arr[0][1];
return $params;
}
}
?>
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