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<?php |
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/** |
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* LayerAttributes Widget class |
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* |
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* @project GeoInnovations 2002 - SECT |
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* @revision $Id: LayerAttributes.widget.php,v 1.3 2004/10/14 18:19:14 pspencer Exp $ |
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* @purpose LayerAttributes Widget class puts the attributes of a layer |
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* into a shared resource for the use of a JSList widget |
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* @author DM Solutions Group (dev@dmsolutions.ca) |
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* @copyright |
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* <b>Copyright (c) 2004, DM Solutions Group Inc.</b> |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice shall be included |
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* in all copies or substantial portions of the Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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* DEALINGS IN THE SOFTWARE. |
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*/ |
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include_once(dirname(__FILE__)."/../Widget.php"); |
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include_once( dirname(__FILE__)."/../LayerAttributes.php" ); |
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/** |
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* LayerAttributes Widget |
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* |
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* @desc a widget that extracts the attributes of a map layer and inserts it |
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* into a SharedResource. |
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*/ |
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class LayerAttributes extends CWCWidget |
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{ |
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/* the name of the shared resource to dump the results into */ |
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var $mszSharedResourceName; |
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/* the index of the layer in the mapfile */ |
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var $mnAttributeLayerIndex; |
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var $mszSelectedItem = ""; |
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/** |
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* LayerAttributes |
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* |
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* Constructor method for the LayerAttributes widget. |
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*/ |
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function LayerAttributes() |
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{ |
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// invoke constructor of parent |
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parent::CWCWidget(); |
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// set the description for this widget |
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$this->szWidgetDescription = <<<EOT |
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The LayerAttributes widget gets the contents of a mapfile layer and adds an array to |
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a SharedResource widget in a format suitable for feeding a JSList widget. |
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The layer to process must be passed in the url as nlayerindex. |
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EOT; |
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$this->maAttributes["SHAREDRESOURCENAME"] = |
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new StringAttribute( "SHAREDRESOURCENAME", true ); |
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$this->maAttributes["LAYERNAME"] = |
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new StringAttribute( "LAYERNAME", false ); |
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$this->maAttributes["ITEM"] = |
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new StringAttribute( "ITEM", true, array( "CLASSITEM", "LABELITEM", "TILEITEM", "FILTERITEM", "STYLEITEM" ) ); |
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$this->maAttributes["ONCHANGE"] = |
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new StringAttribute( "ONCHANGE", false ); |
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$this->maAttributes["VISIBILITY"] = |
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new BooleanAttribute( "VISIBILITY", false ); |
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$this->mnMaturityLevel = MATURITY_ALPHA; |
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} |
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/** |
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* initialize respectable defaults |
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*/ |
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function InitDefaults() |
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{ |
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parent::InitDefaults(); |
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if (isset($this->maParams["SHAREDRESOURCENAME"])) |
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{ |
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$this->mszSharedResourceName = |
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$this->maParams["SHAREDRESOURCENAME"]; |
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} |
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if (!isset($this->maParams["ONCHANGE"])) |
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{ |
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$this->maParams["ONCHANGE"] = ''; |
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} |
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} |
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/** |
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* return an array of HTML variables to include in the page |
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*/ |
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function GetHTMLHiddenVariables() |
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{ |
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$aReturn = array(); |
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$szVariable = 'nlayerindex'; |
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return $aReturn; |
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} |
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/** |
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* Parse the layer and create the necessary entries in the |
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* shared resource. |
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*/ |
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function ParseURL() |
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{ |
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$srName = $this->mszSharedResourceName; |
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$oMap = $this->moMapObject->oMap; |
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if ($this->isVarSet('initlayername')) |
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{ |
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//this is coming from the main interface |
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//convert a named layer into a layer index |
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$oLayer = $oMap->getLayerByName( $this->getVar('initlayername') ); |
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$this->mnAttributeLayerIndex = $oLayer->index; |
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} |
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elseif($this->isVarSet('initlayerindex')) |
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{ |
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$oLayer = $oMap->getLayer( $this->getVar('initlayerindex') ); |
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$this->mnAttributeLayerIndex = $oLayer->index; |
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} |
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else |
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{ |
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//use previously set layer - reloading |
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$oLayer = $oMap->getLayer( $this->getVar('nlayerindex') ); |
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$this->mnAttributeLayerIndex = $oLayer->index; |
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} |
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if ( strcasecmp( $this->maParams['ITEM'], 'classitem' ) == 0 ) |
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$this->mszSelectedItem = $oLayer->classitem; |
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else if ( strcasecmp( $this->maParams['ITEM'], 'labelitem' ) == 0 ) |
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$this->mszSelectedItem = $oLayer->labelitem; |
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else if ( strcasecmp( $this->maParams['ITEM'], 'tileitem' ) == 0 ) |
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$this->mszSelectedItem = $oLayer->tileitem; |
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else if ( strcasecmp( $this->maParams['ITEM'], 'filteritem' ) == 0 ) |
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$this->mszSelectedItem = $oLayer->filteritem; |
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else if ( strcasecmp( $this->maParams['ITEM'], 'styleitem' ) == 0 ) |
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$this->mszSelectedItem = $oLayer->styleitem; |
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//:TODO: format results as a proper sr so that |
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//we can allow this widget to use it's own drawing |
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//or pass it off to a JSList if visiblity=false |
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//gather attributes and assign them to sharedreosource |
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//first check for existing shared resource, then session vars then |
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//get it from server/local layer |
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if(!(isset($this->maSharedResourceWidgets[$srName]) && |
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count($this->maSharedResourceWidgets[$srName]->maszContents))) |
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{ |
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if (isset($_SESSION[$srName][$oLayer->name])) |
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{ |
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$this->maSharedResourceWidgets[$srName] = |
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$_SESSION[$srName][$oLayer->name]; |
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} |
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else |
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{ |
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$this->maSharedResourceWidgets[$srName]->maszContents = |
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GetLayerAttributes($oLayer); |
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$_SESSION[$srName][$oLayer->name] = |
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$this->maSharedResourceWidgets[$srName]; |
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} |
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} |
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return true; |
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} |
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function DrawPublish() |
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{ |
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if (!$this->mbVisible) |
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return "<!-- LayerAttributes widget hidden -->"; |
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$srName = $this->mszSharedResourceName; |
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$sr = $this->maSharedResourceWidgets[$srName]; |
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//generate an option select list of attributes |
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//or a text entry box if there are none. |
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if (!count($sr->maszContents)) |
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{ |
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$szResult = '<input TYPE="text" SIZE="10" NAME="'; |
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$szResult .= $this->maParams['ITEM']. |
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'" ID="' .$this->maParams['ITEM']. |
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'" ONCHANGE="'. |
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$this->maParams['ONCHANGE']; |
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$szResult .= '" >'."\n"; |
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} |
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else |
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{ |
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$szResult = '<SELECT NAME="' .$this->maParams['ITEM']. |
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'" id="' .$this->maParams['ITEM']. |
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'" ONCHANGE="'. |
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$this->maParams['ONCHANGE']. |
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'" >'."\n"; |
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$szResult .= ' <OPTION VALUE="">None'."\n"; |
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foreach(array_keys($sr->maszContents['fields']) as $szFieldName) |
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{ |
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if ($szFieldName != "LayerType") |
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{ |
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$szResult .= ' <OPTION VALUE="'. $szFieldName.'"'; |
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if (strcasecmp( $szFieldName, $this->mszSelectedItem) == 0) |
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$szResult .= ' SELECTED'; |
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$szResult .= '>'. $szFieldName."\n"; |
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} |
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} |
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$szResult .= '</SELECT>'."\n"; |
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} |
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return $szResult; |
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} |
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} |
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?> |
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