/
pma_gis_multipoint.php
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/
pma_gis_multipoint.php
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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Handles the visualization of GIS MULTIPOINT objects.
*
* @package PhpMyAdmin-GIS
*/
class PMA_GIS_Multipoint extends PMA_GIS_Geometry
{
// Hold the singleton instance of the class
private static $_instance;
/**
* A private constructor; prevents direct creation of object.
*
* @access private
*/
private function __construct()
{
}
/**
* Returns the singleton.
*
* @return object the singleton
* @access public
*/
public static function singleton()
{
if (!isset(self::$_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 'MULTIPOINT(' and trailing ')'
$multipoint = substr($spatial, 11, (strlen($spatial) - 12));
return $this->setMinMax($multipoint, array());
}
/**
* Adds to the PNG image object, the data related to a row in the GIS dataset.
*
* @param string $spatial GIS MULTIPOINT object
* @param string $label Label for the GIS MULTIPOINT object
* @param string $point_color Color for the GIS MULTIPOINT object
* @param array $scale_data Array containing data related to scaling
* @param object $image Image object
*
* @return object the modified image object
* @access public
*/
public function prepareRowAsPng($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 'MULTIPOINT(' and trailing ')'
$multipoint = substr($spatial, 11, (strlen($spatial) - 12));
$points_arr = $this->extractPoints($multipoint, $scale_data);
foreach ($points_arr as $point) {
// draw a small circle to mark the point
if ($point[0] != '' && $point[1] != '') {
imagearc($image, $point[0], $point[1], 7, 7, 0, 360, $color);
}
}
// print label for each point
if ((isset($label) && trim($label) != '')
&& ($points_arr[0][0] != '' && $points_arr[0][1] != '')
) {
imagestring($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 MULTIPOINT object
* @param string $label Label for the GIS MULTIPOINT object
* @param string $point_color Color for the GIS MULTIPOINT object
* @param array $scale_data Array containing data related to scaling
* @param object $pdf TCPDF instance
*
* @return object the modified TCPDF instance
* @access public
*/
public function prepareRowAsPdf($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 'MULTIPOINT(' and trailing ')'
$multipoint = substr($spatial, 11, (strlen($spatial) - 12));
$points_arr = $this->extractPoints($multipoint, $scale_data);
foreach ($points_arr as $point) {
// draw a small circle to mark the point
if ($point[0] != '' && $point[1] != '') {
$pdf->Circle($point[0], $point[1], 2, 0, 360, 'D', $line);
}
}
// print label for each point
if ((isset($label) && trim($label) != '')
&& ($points_arr[0][0] != '' && $points_arr[0][1] != '')
) {
$pdf->SetXY($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 MULTIPOINT object
* @param string $label Label for the GIS MULTIPOINT object
* @param string $point_color Color for the GIS MULTIPOINT 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,
'class' => 'multipoint vector',
'fill' => 'white',
'stroke' => $point_color,
'stroke-width'=> 2,
);
// Trim to remove leading 'MULTIPOINT(' and trailing ')'
$multipoint = substr($spatial, 11, (strlen($spatial) - 12));
$points_arr = $this->extractPoints($multipoint, $scale_data);
$row = '';
foreach ($points_arr as $point) {
if ($point[0] != '' && $point[1] != '') {
$row .= '<circle cx="' . $point[0] . '" cy="' . $point[1] . '" r="3"';
$point_options['id'] = $label . rand();
foreach ($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 MULTIPOINT object
* @param int $srid Spatial reference ID
* @param string $label Label for the GIS MULTIPOINT object
* @param string $point_color Color for the GIS MULTIPOINT 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 'MULTIPOINT(' and trailing ')'
$multipoint = substr($spatial, 11, (strlen($spatial) - 12));
$points_arr = $this->extractPoints($multipoint, null);
$row = 'new Array(';
foreach ($points_arr as $point) {
if ($point[0] != '' && $point[1] != '') {
$row .= '(new OpenLayers.Geometry.Point(' . $point[0] . ', ' . $point[1]
. ')).transform(new OpenLayers.Projection("EPSG:' . $srid
. '"), map.getProjectionObject()), ';
}
}
if (substr($row, strlen($row) - 2) == ', ') {
$row = substr($row, 0, strlen($row) - 2);
}
$row .= ')';
$result .= 'vectorLayer.addFeatures(new OpenLayers.Feature.Vector('
. 'new OpenLayers.Geometry.MultiPoint(' . $row . '), null, '
. json_encode($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 $empty Multipoint does not adhere to this
*
* @return string WKT with the set of parameters passed by the GIS editor
* @access public
*/
public function generateWkt($gis_data, $index, $empty = '')
{
$no_of_points = isset($gis_data[$index]['MULTIPOINT']['no_of_points'])
? $gis_data[$index]['MULTIPOINT']['no_of_points'] : 1;
if ($no_of_points < 1) {
$no_of_points = 1;
}
$wkt = 'MULTIPOINT(';
for ($i = 0; $i < $no_of_points; $i++) {
$wkt .= ((isset($gis_data[$index]['MULTIPOINT'][$i]['x'])
&& trim($gis_data[$index]['MULTIPOINT'][$i]['x']) != '')
? $gis_data[$index]['MULTIPOINT'][$i]['x'] : '')
. ' ' . ((isset($gis_data[$index]['MULTIPOINT'][$i]['y'])
&& trim($gis_data[$index]['MULTIPOINT'][$i]['y']) != '')
? $gis_data[$index]['MULTIPOINT'][$i]['y'] : '') . ',';
}
$wkt = substr($wkt, 0, strlen($wkt) - 1);
$wkt .= ')';
return $wkt;
}
/**
* 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)
{
$wkt = 'MULTIPOINT(';
for ($i = 0; $i < $row_data['numpoints']; $i++) {
$wkt .= $row_data['points'][$i]['x'] . ' ' . $row_data['points'][$i]['y'] . ',';
}
$wkt = substr($wkt, 0, strlen($wkt) - 1);
$wkt .= ')';
return $wkt;
}
/**
* Generate parameters for the GIS data editor from the value of the GIS column.
*
* @param string $value of the GIS column
* @param index $index of the geometry
*
* @return array params for the GIS data editor from the value of the GIS column
* @access public
*/
public function generateParams($value, $index = -1)
{
if ($index == -1) {
$index = 0;
$params = array();
$data = PMA_GIS_Geometry::generateParams($value);
$params['srid'] = $data['srid'];
$wkt = $data['wkt'];
} else {
$params[$index]['gis_type'] = 'MULTIPOINT';
$wkt = $value;
}
// Trim to remove leading 'MULTIPOINT(' and trailing ')'
$points = substr($wkt, 11, (strlen($wkt) - 12));
$points_arr = $this->extractPoints($points, null);
$no_of_points = count($points_arr);
$params[$index]['MULTIPOINT']['no_of_points'] = $no_of_points;
for ($i = 0; $i < $no_of_points; $i++) {
$params[$index]['MULTIPOINT'][$i]['x'] = $points_arr[$i][0];
$params[$index]['MULTIPOINT'][$i]['y'] = $points_arr[$i][1];
}
return $params;
}
}
?>