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Chris Sewell
260
html/phpmyad/libraries/gis/pma_gis_point.php
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260
html/phpmyad/libraries/gis/pma_gis_point.php
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<?php
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/**
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* Handles the visualization of GIS POINT objects.
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*
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* @package PhpMyAdmin-GIS
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*/
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class PMA_GIS_Point extends PMA_GIS_Geometry
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{
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// Hold the singleton instance of the class
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private static $_instance;
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/**
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* A private constructor; prevents direct creation of object.
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*/
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private function __construct()
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{
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}
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/**
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* Returns the singleton.
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*
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* @return the singleton
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*/
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public static function singleton()
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{
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if (!isset(self::$_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 $spatial spatial data of a row
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*
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* @return array containing the min, max values for x and y cordinates
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*/
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public function scaleRow($spatial)
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{
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = substr($spatial, 6, (strlen($spatial) - 7));
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return $this->setMinMax($point, 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 POINT object
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* @param string $label Label for the GIS POINT object
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* @param string $point_color Color for the GIS POINT object
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* @param array $scale_data Array containing data related to scaling
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* @param image $image Image object
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*
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* @return the modified image object
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*/
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public function prepareRowAsPng($spatial, $label, $point_color, $scale_data, $image)
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{
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// allocate colors
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$black = imagecolorallocate($image, 0, 0, 0);
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$red = hexdec(substr($point_color, 1, 2));
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$green = hexdec(substr($point_color, 3, 2));
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$blue = hexdec(substr($point_color, 4, 2));
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$color = imagecolorallocate($image, $red, $green, $blue);
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = substr($spatial, 6, (strlen($spatial) - 7));
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$points_arr = $this->extractPoints($point, $scale_data);
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// draw a small circle to mark the point
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if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
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imagearc($image, $points_arr[0][0], $points_arr[0][1], 7, 7, 0, 360, $color);
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// print label if applicable
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if (isset($label) && trim($label) != '') {
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imagestring($image, 1, $points_arr[0][0], $points_arr[0][1], trim($label), $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 POINT object
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* @param string $label Label for the GIS POINT object
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* @param string $point_color Color for the GIS POINT object
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* @param array $scale_data Array containing data related to scaling
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* @param image $pdf TCPDF instance
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*
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* @return the modified TCPDF instance
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*/
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public function prepareRowAsPdf($spatial, $label, $point_color, $scale_data, $pdf)
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{
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// allocate colors
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$red = hexdec(substr($point_color, 1, 2));
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$green = hexdec(substr($point_color, 3, 2));
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$blue = hexdec(substr($point_color, 4, 2));
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$line = array('width' => 1.25, 'color' => array($red, $green, $blue));
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = substr($spatial, 6, (strlen($spatial) - 7));
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$points_arr = $this->extractPoints($point, $scale_data);
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// draw a small circle to mark the point
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if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
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$pdf->Circle($points_arr[0][0], $points_arr[0][1], 2, 0, 360, 'D', $line);
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// print label if applicable
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if (isset($label) && trim($label) != '') {
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$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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}
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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 POINT object
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* @param string $label Label for the GIS POINT object
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* @param string $point_color Color for the GIS POINT object
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* @param array $scale_data Array containing data related to scaling
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*
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* @return the code related to a row in the GIS dataset
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*/
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public function prepareRowAsSvg($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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'id' => $label . rand(),
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'class' => 'point vector',
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'fill' => 'white',
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'stroke' => $point_color,
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'stroke-width'=> 2,
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);
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = substr($spatial, 6, (strlen($spatial) - 7));
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$points_arr = $this->extractPoints($point, $scale_data);
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$row = '';
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if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
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$row .= '<circle cx="' . $points_arr[0][0] . '" cy="' . $points_arr[0][1] . '" r="3"';
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foreach ($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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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 POINT object
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* @param int $srid Spatial reference ID
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* @param string $label Label for the GIS POINT object
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* @param string $point_color Color for the GIS POINT object
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* @param array $scale_data Array containing data related to scaling
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*
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* @return JavaScript related to a row in the GIS dataset
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*/
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public function prepareRowAsOl($spatial, $srid, $label, $point_color, $scale_data)
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{
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$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, $scale_data);
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = substr($spatial, 6, (strlen($spatial) - 7));
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$points_arr = $this->extractPoints($point, null);
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if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
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$result .= 'vectorLayer.addFeatures(new OpenLayers.Feature.Vector(('
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. 'new OpenLayers.Geometry.Point(' . $points_arr[0][0] . ', '
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. $points_arr[0][1] . ').transform(new OpenLayers.Projection("EPSG:'
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. $srid . '"), map.getProjectionObject())), null, '
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. json_encode($style_options) . '));';
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}
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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 $empty Point deos not adhere to this parameter
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*
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* @return WKT with the set of parameters passed by the GIS editor
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*/
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public function generateWkt($gis_data, $index, $empty = '')
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{
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return 'POINT('
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. ((isset($gis_data[$index]['POINT']['x']) && trim($gis_data[$index]['POINT']['x']) != '')
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? $gis_data[$index]['POINT']['x'] : '') . ' '
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. ((isset($gis_data[$index]['POINT']['y']) && trim($gis_data[$index]['POINT']['y']) != '')
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? $gis_data[$index]['POINT']['y'] : '') . ')';
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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 $row_data GIS data
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*
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* @return the WKT for the data from ESRI shape files
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*/
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public function getShape($row_data)
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{
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return 'POINT(' . (isset($row_data['x']) ? $row_data['x'] : '')
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. ' ' . (isset($row_data['y']) ? $row_data['y'] : '') . ')';
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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 of the GIS column
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* @param index $index of the geometry
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*
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* @return parameters for the GIS data editor from the value of the GIS column
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*/
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public function generateParams($value, $index = -1)
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{
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if ($index == -1) {
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$index = 0;
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$params = array();
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$data = PMA_GIS_Geometry::generateParams($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[$index]['gis_type'] = 'POINT';
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$wkt = $value;
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}
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = substr($wkt, 6, (strlen($wkt) - 7));
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$points_arr = $this->extractPoints($point, null);
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$params[$index]['POINT']['x'] = $points_arr[0][0];
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$params[$index]['POINT']['y'] = $points_arr[0][1];
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return $params;
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}
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}
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?>
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