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1 <?php 2 /////////////////////////////////////////////////////////////////////////// 3 // // 4 // NOTICE OF COPYRIGHT // 5 // // 6 // Moodle - Modular Object-Oriented Dynamic Learning Environment // 7 // http://moodle.org // 8 // // 9 // Copyright (C) 1999-onwards Moodle Pty Ltd http://moodle.com // 10 // // 11 // This program is free software; you can redistribute it and/or modify // 12 // it under the terms of the GNU General Public License as published by // 13 // the Free Software Foundation; either version 2 of the License, or // 14 // (at your option) any later version. // 15 // // 16 // This program is distributed in the hope that it will be useful, // 17 // but WITHOUT ANY WARRANTY; without even the implied warranty of // 18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // 19 // GNU General Public License for more details: // 20 // // 21 // http://www.gnu.org/copyleft/gpl.html // 22 // // 23 /////////////////////////////////////////////////////////////////////////// 24 25 class data_field_latlong extends data_field_base { 26 var $type = 'latlong'; 27 28 // This is an array of URL schemes for linking out to services, using the float values of lat and long. 29 // In each scheme, the special markers @lat@ and @long@ will be replaced by the float values. 30 // The config options for the field store each service name that should be displayed, in a comma-separated 31 // field. Therefore please DO NOT include commas in the service names if you are adding extra services. 32 33 // Parameter data used: 34 // "param1" is a comma-separated list of the linkout service names that are enabled for this instance 35 // "param2" indicates the label that will be used in generating Google Earth KML files: -1 for item #, -2 for lat/long, positive number for the (text) field to use. 36 37 var $linkoutservices = array( 38 "Google Maps" => "http://maps.google.com/maps?q=@lat@,+@long@&iwloc=A&hl=en", 39 "Google Earth" => "@wwwroot@/mod/data/field/latlong/kml.php?d=@dataid@&fieldid=@fieldid@&rid=@recordid@", 40 "Geabios" => "http://www.geabios.com/html/services/maps/PublicMap.htm?lat=@lat@&lon=@long@&fov=0.3&title=Moodle%20data%20item", 41 "OpenStreetMap" => "http://www.openstreetmap.org/index.html?lat=@lat@&lon=@long@&zoom=11", 42 "Multimap" => "http://www.multimap.com/map/browse.cgi?scale=200000&lon=@long@&lat=@lat@&icon=x" 43 ); 44 // Other map sources listed at http://kvaleberg.com/extensions/mapsources/index.php?params=51_30.4167_N_0_7.65_W_region:earth 45 46 function display_add_field($recordid = 0, $formdata = null) { 47 global $CFG, $DB, $OUTPUT; 48 49 $lat = ''; 50 $long = ''; 51 if ($formdata) { 52 $fieldname = 'field_' . $this->field->id . '_0'; 53 $lat = $formdata->$fieldname; 54 $fieldname = 'field_' . $this->field->id . '_1'; 55 $long = $formdata->$fieldname; 56 } else if ($recordid) { 57 if ($content = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) { 58 $lat = $content->content; 59 $long = $content->content1; 60 } 61 } 62 $str = '<div title="'.s($this->field->description).'">'; 63 $str .= '<fieldset><legend><span class="accesshide">'.$this->field->name.'</span></legend>'; 64 $str .= '<table><tr><td align="right">'; 65 $str .= '<label for="field_'.$this->field->id.'_0" class="mod-data-input">' . get_string('latitude', 'data'); 66 if ($this->field->required) { 67 $str .= html_writer::img($OUTPUT->pix_url('req'), get_string('requiredelement', 'form'), 68 array('class' => 'req', 'title' => get_string('requiredelement', 'form'))); 69 } 70 $str .= '</label></td><td><input type="text" name="field_'.$this->field->id.'_0" id="field_'.$this->field->id.'_0" value="'; 71 $str .= s($lat).'" size="10" />°N</td></tr>'; 72 $str .= '<tr><td align="right"><label for="field_'.$this->field->id.'_1" class="mod-data-input">'; 73 $str .= get_string('longitude', 'data'); 74 if ($this->field->required) { 75 $str .= html_writer::img($OUTPUT->pix_url('req'), get_string('requiredelement', 'form'), 76 array('class' => 'req', 'title' => get_string('requiredelement', 'form'))); 77 } 78 $str .= '</label></td><td><input type="text" name="field_'.$this->field->id.'_1" id="field_'.$this->field->id.'_1" value="'; 79 $str .= s($long).'" size="10" />°E</td>'; 80 $str .= '</tr>'; 81 $str .= '</table>'; 82 $str .= '</fieldset>'; 83 $str .= '</div>'; 84 return $str; 85 } 86 87 function display_search_field($value = '') { 88 global $CFG, $DB; 89 90 $varcharlat = $DB->sql_compare_text('content'); 91 $varcharlong= $DB->sql_compare_text('content1'); 92 $latlongsrs = $DB->get_recordset_sql( 93 "SELECT DISTINCT $varcharlat AS la, $varcharlong AS lo 94 FROM {data_content} 95 WHERE fieldid = ? 96 ORDER BY $varcharlat, $varcharlong", array($this->field->id)); 97 98 $options = array(); 99 foreach ($latlongsrs as $latlong) { 100 $latitude = format_float($latlong->la, 4); 101 $longitude = format_float($latlong->lo, 4); 102 $options[$latlong->la . ',' . $latlong->lo] = $latitude . ' ' . $longitude; 103 } 104 $latlongsrs->close(); 105 106 $return = html_writer::label(get_string('latlong', 'data'), 'menuf_'.$this->field->id, false, array('class' => 'accesshide')); 107 $return .= html_writer::select($options, 'f_'.$this->field->id, $value); 108 return $return; 109 } 110 111 function parse_search_field() { 112 return optional_param('f_'.$this->field->id, '', PARAM_NOTAGS); 113 } 114 115 function generate_sql($tablealias, $value) { 116 global $DB; 117 118 static $i=0; 119 $i++; 120 $name1 = "df_latlong1_$i"; 121 $name2 = "df_latlong2_$i"; 122 $varcharlat = $DB->sql_compare_text("{$tablealias}.content"); 123 $varcharlong= $DB->sql_compare_text("{$tablealias}.content1"); 124 125 126 $latlong[0] = ''; 127 $latlong[1] = ''; 128 $latlong = explode (',', $value, 2); 129 return array(" ({$tablealias}.fieldid = {$this->field->id} AND $varcharlat = :$name1 AND $varcharlong = :$name2) ", 130 array($name1=>$latlong[0], $name2=>$latlong[1])); 131 } 132 133 function display_browse_field($recordid, $template) { 134 global $CFG, $DB; 135 if ($content = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) { 136 $lat = $content->content; 137 if (strlen($lat) < 1) { 138 return false; 139 } 140 $long = $content->content1; 141 if (strlen($long) < 1) { 142 return false; 143 } 144 // We use format_float to display in the regional format. 145 if($lat < 0) { 146 $compasslat = format_float(-$lat, 4) . '°S'; 147 } else { 148 $compasslat = format_float($lat, 4) . '°N'; 149 } 150 if($long < 0) { 151 $compasslong = format_float(-$long, 4) . '°W'; 152 } else { 153 $compasslong = format_float($long, 4) . '°E'; 154 } 155 156 // Now let's create the jump-to-services link 157 $servicesshown = explode(',', $this->field->param1); 158 159 // These are the different things that can be magically inserted into URL schemes 160 $urlreplacements = array( 161 '@lat@'=> $lat, 162 '@long@'=> $long, 163 '@wwwroot@'=> $CFG->wwwroot, 164 '@contentid@'=> $content->id, 165 '@dataid@'=> $this->data->id, 166 '@courseid@'=> $this->data->course, 167 '@fieldid@'=> $content->fieldid, 168 '@recordid@'=> $content->recordid, 169 ); 170 171 if(sizeof($servicesshown)==1 && $servicesshown[0]) { 172 $str = " <a href='" 173 . str_replace(array_keys($urlreplacements), array_values($urlreplacements), $this->linkoutservices[$servicesshown[0]]) 174 ."' title='$servicesshown[0]'>$compasslat $compasslong</a>"; 175 } elseif (sizeof($servicesshown)>1) { 176 $str = '<form id="latlongfieldbrowse">'; 177 $str .= "$compasslat, $compasslong\n"; 178 $str .= "<label class='accesshide' for='jumpto'>". get_string('jumpto') ."</label>"; 179 $str .= "<select id='jumpto' name='jumpto'>"; 180 foreach($servicesshown as $servicename){ 181 // Add a link to a service 182 $str .= "\n <option value='" 183 . str_replace(array_keys($urlreplacements), array_values($urlreplacements), $this->linkoutservices[$servicename]) 184 . "'>".htmlspecialchars($servicename)."</option>"; 185 } 186 // NB! If you are editing this, make sure you don't break the javascript reference "previousSibling" 187 // which allows the "Go" button to refer to the drop-down selector. 188 $str .= "\n</select><input type='button' value='" . get_string('go') . "' onclick='if(previousSibling.value){self.location=previousSibling.value}'/>"; 189 $str .= '</form>'; 190 } else { 191 $str = "$compasslat, $compasslong"; 192 } 193 194 return $str; 195 } 196 return false; 197 } 198 199 function update_content($recordid, $value, $name='') { 200 global $DB; 201 202 $content = new stdClass(); 203 $content->fieldid = $this->field->id; 204 $content->recordid = $recordid; 205 // When updating these values (which might be region formatted) we should format 206 // the float to allow for a consistent float format in the database. 207 $value = unformat_float($value); 208 $value = trim($value); 209 if (strlen($value) > 0) { 210 $value = floatval($value); 211 } else { 212 $value = null; 213 } 214 $names = explode('_', $name); 215 switch ($names[2]) { 216 case 0: 217 // update lat 218 $content->content = $value; 219 break; 220 case 1: 221 // update long 222 $content->content1 = $value; 223 break; 224 default: 225 break; 226 } 227 if ($oldcontent = $DB->get_record('data_content', array('fieldid'=>$this->field->id, 'recordid'=>$recordid))) { 228 $content->id = $oldcontent->id; 229 return $DB->update_record('data_content', $content); 230 } else { 231 return $DB->insert_record('data_content', $content); 232 } 233 } 234 235 function get_sort_sql($fieldname) { 236 global $DB; 237 return $DB->sql_cast_char2real($fieldname, true); 238 } 239 240 function export_text_value($record) { 241 // The content here is from the database and does not require location formating. 242 return sprintf('%01.4f', $record->content) . ' ' . sprintf('%01.4f', $record->content1); 243 } 244 245 /** 246 * Check if a field from an add form is empty 247 * 248 * @param mixed $value 249 * @param mixed $name 250 * @return bool 251 */ 252 function notemptyfield($value, $name) { 253 return isset($value) && !($value == ''); 254 } 255 256 /** 257 * Validate values for this field. 258 * Both the Latitude and the Longitude fields need to be filled in. 259 * 260 * @param array $values The entered values for the lat. and long. 261 * @return string|bool Error message or false. 262 */ 263 public function field_validation($values) { 264 $valuecount = 0; 265 // The lat long class has two values that need to be checked. 266 foreach ($values as $value) { 267 if (isset($value->value) && !($value->value == '')) { 268 $valuecount++; 269 } 270 } 271 // If we have nothing filled in or both filled in then everything is okay. 272 if ($valuecount == 0 || $valuecount == 2) { 273 return false; 274 } 275 // If we get here then only one field has been filled in. 276 return get_string('latlongboth', 'data'); 277 } 278 }
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| Generated: Thu Aug 11 10:00:09 2016 | Cross-referenced by PHPXref 0.7.1 |