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Semantic Maps

, 1 Aug 2009 GPL3
A MediaWiki extension that allows you to insert, edit, view and aggregate coordinate data
SemanticMaps
COPYING
GoogleMaps
INSTALL
OpenLayers
README
RELEASE-NOTES
YahooMaps
Maps
COPYING
Geocoders
GoogleMaps
INSTALL
OpenLayers
OpenLayers
img
blank.gif
cloud-popup-relative.png
drag-rectangle-off.png
drag-rectangle-on.png
east-mini.png
layer-switcher-maximize.png
layer-switcher-minimize.png
marker-blue.png
marker-gold.png
marker-green.png
marker.png
measuring-stick-off.png
measuring-stick-on.png
north-mini.png
panning-hand-off.png
panning-hand-on.png
slider.png
south-mini.png
west-mini.png
zoom-minus-mini.png
zoom-plus-mini.png
zoom-world-mini.png
zoombar.png
theme
default
img
add_point_off.png
add_point_on.png
blank.gif
close.gif
drag-rectangle-off.png
drag-rectangle-on.png
draw_line_off.png
draw_line_on.png
draw_point_off.png
draw_point_on.png
draw_polygon_off.png
draw_polygon_on.png
editing_tool_bar.png
move_feature_off.png
move_feature_on.png
navigation_history.png
overview_replacement.gif
pan-panel-NOALPHA.png
pan-panel.png
panning-hand-off.png
panning-hand-on.png
pan_off.png
pan_on.png
remove_point_off.png
remove_point_on.png
ruler.png
save_features_off.png
save_features_on.png
view_next_off.png
view_next_on.png
view_previous_off.png
view_previous_on.png
zoom-panel-NOALPHA.png
zoom-panel.png
OSM
README
RELEASE-NOTES
YahooMaps
<?php

/**
 * Abstract class that provides the common functionallity for all map query printers
 *
 * @file SM_MapPrinter.php
 * @ingroup SemanticMaps
 *
 * @author Jeroen De Dauw
 * @author Robert Buzink
 * @author Yaron Koren
 */

if( !defined( 'MEDIAWIKI' ) ) {
	die( 'Not an entry point.' );
}

abstract class SMMapPrinter extends SMWResultPrinter {
	// TODO: make class and child's more OOP, in a way similair to class MapsBaseMap in Maps

	protected $m_locations = array();
	
	public function getResult($results, $params, $outputmode) {
		// Skip checks, results with 0 entries are normal
		$this->readParameters($params, $outputmode);
		return $this->getResultText($results, SMW_OUTPUT_HTML);
	}
	
	protected function getResultText($res, $outputmode) {
		while ( ($row = $res->getNext()) !== false ) {
			$this->addResultRow($outputmode, $row);
		}
		
		$this->m_params = MapsMapper::setDefaultParValues($this->m_params, true);
	}
	
	/**
	 * This function will loop through all properties (fields) of one record (row),
	 * and add the location data, title, label and icon to the m_locations array.
	 *
	 * @param unknown_type $outputmode
	 * @param unknown_type $row The record you want to add data from
	 */
	private function addResultRow($outputmode, $row) {
		global $wgUser;
		$skin = $wgUser->getSkin();		
		
		$title = '';
		$text = '';
		$lat = '';
		$lon = '';		
		
		// Loop throught all fields of the record
		foreach ($row as $i => $field) {
			$pr = $field->getPrintRequest();
			
			// Loop throught all the parts of the field value
			while ( ($object = $field->getNextObject()) !== false ) {
				if ($object->getTypeID() == '_wpg' && $i == 0) {
					$title = $object->getLongText($outputmode, $skin);
				}
				
				if ($object->getTypeID() != '_geo' && $i != 0) {
					$text .= $pr->getHTMLText($skin) . ": " . $object->getLongText($outputmode, $skin) . "<br />";
				}
		
				if ($pr->getMode() == SMWPrintRequest::PRINT_PROP && $pr->getTypeID() == '_geo') {
					list($lat,$lon) = explode(',', $object->getXSDValue());
				}
			}
		}
		
		if (strlen($lat) > 0 && strlen($lon)  > 0) {
			$icon = $this->getLocationIcon($row);
			$this->m_locations[] = array($lat, $lon, $title, $text, $icon);
		}
	}
	
	/**
	 * Get the icon for a row
	 *
	 * @param unknown_type $row
	 * @return unknown
	 */
	private function getLocationIcon($row) {
		$icon = '';
		$legend_labels = array();
		
		// Look for display_options field, which can be set by Semantic Compound Queries
		if (property_exists($row[0], 'display_options')) {
			if (array_key_exists('icon', $row[0]->display_options)) {
				$icon = $row[0]->display_options['icon'];

				// This is somewhat of a hack - if a legend label has been set, we're getting it for every point, instead of just once per icon	
				if (array_key_exists('legend label', $row[0]->display_options)) {
									
					$legend_label = $row[0]->display_options['legend label'];
					
					if (! array_key_exists($icon, $legend_labels)) {
						$legend_labels[$icon] = $legend_label;
					}
				}
			}
		// Icon can be set even for regular, non-compound queries If it is, though, we have to translate the name into a URL here	
		} elseif (array_key_exists('icon', $this->m_params)) {
	
			$icon_title = Title::newFromText($this->m_params['icon']);
			$icon_image_page = new ImagePage($icon_title);
			$icon = $icon_image_page->getDisplayedFile()->getURL();
		}	

		return $icon;
	}
	
}

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License

This article, along with any associated source code and files, is licensed under The GNU General Public License (GPLv3)

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About the Author

Jeroen De Dauw
Software Developer
Belgium Belgium
I am a free and open source software enthusiast and freelance software developer with multiple years of experience in both web and desktop development. Currently my primarily focus is on MediaWiki and Semantic MediaWiki work. I'm in the all time top 10 MediaWiki comitters and am one of the WikiWorks consultants. You can contact me at jeroendedauw at gmail for development jobs and questions related to my work.

More info can be found on my website [0] and my blog [1]. You can also follow me on twitter [2] and identi.ca [3].

[0] http://www.jeroendedauw.com/
[1] http://blog.bn2vs.com/
[2] https://twitter.com/#!/JeroenDeDauw
[3] http://identi.ca/jeroendedauw

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