root/Chameleon/trunk/Chameleon/RemoveLayer/RemoveLayer.widget.php

<?php
/**
* RemoveLayer Widget class
*
* @project     CWC2
* @revision    $Id: RemoveLayer.widget.php,v 1.3 2005/05/27 20:07:35 bartvde Exp $
* @purpose     RemoveLayer Widget class
* @author      DM Solutions Group (pspencer@dmsolutions.ca)
* @copyright
* <b>Copyright (c) 2002, DM Solutions Group Inc.</b>
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/

/* based on Code provided by GeoDan */

include_once(dirname(__FILE__)."/../Widget.php");
include_once(dirname(__FILE__)."/../Button.php");

/**
* RemoveLayer
*
* @desc Display a clickable image that will update the map
*/
class RemoveLayer extends CWCWidget
{

        /**
        * RemoveLayer
        *
        * Constructor for the RemoveLayer
        */
        function RemoveLayer()
        {
                // invoke constructor of parent
                parent::CWCWidget();
                $this->mnPriority = PRIORITY_HIGH;

                // set the description for this widget
                $this->szWidgetDescription = <<<EOT
The RemoveLayer widget removes the selected layer(s) from the map.  This widget uses
the SelectLayer widget which works best with the HTML LegendTemplate widget.
EOT;

                $this->moButton = new CWCButton($this);
                $this->moButton->SetOnClick( "clickRemoveLayer" );
        $this->mnMaturityLevel = MATURITY_BETA;
        }

        function InitDefaults()
        {
                parent::InitDefaults();
                $this->moButton->InitDefaults();
        }

        /**
        * GetHTMLHiddenVariables
        *
        * Return HTML hidden variables.
        */
        function GetHTMLHiddenVariables()
        {
                $szVariable = "REMOVE_LAYER".$this->mnId;
                $szValue = " <INPUT TYPE=HIDDEN NAME=$szVariable VALUE=\"\">";
                $aReturn[$szVariable] = $szValue;
                return $aReturn;
        }

        /**
        * GetJavascriptFunctions
        *
        * Return the Javacriptfunctions needed by the widget.
        */
        function GetJavascriptFunctions()
        {
                $aReturn = $this->moButton->GetJavascriptFunctions();

                $szJsFunctionName = "clickRemoveLayer";
                $nId = $this->mnId;
                $szFunction = <<<EOT
/**
 * {$szJsFunctionName}
 * called when the user clicks the RemoveLayer icon
 */

function {$szJsFunctionName}()
{
    with({$this->mszHTMLForm})
    {
       REMOVE_LAYER{$nId}.value = "1";
       submit();
    }
    return;
}

EOT;
                $aReturn[$szJsFunctionName] = $szFunction;

                return $aReturn;
        }
        /**
        * return javascript functions
        */
        function GetJavascriptIncludeFunctions()
        {
                return $this->moButton->GetJavascriptIncludeFunctions();
        }

        /**
        * return javascript variables
        */
        function GetJavascriptVariables()
        {
                return $this->moButton->GetJavascriptVariables();
        }

        /**
        * return javascript onload functions
        */
        function GetJavascriptOnLoadFunctions()
        {
                return $this->moButton->GetJavascriptOnLoadFunctions();
        }

        /**
        * return javascript initialization funcitons
        */
        function GetJavascriptInitFunctions()
        {
                return $this->moButton->GetJavascriptInitFunctions();
        }

        /**
        * DrawPublish
        *
        * Return the HTML code using the name in the map file and the
        * parameters of the CWC tag.
        */
        function DrawPublish()
        {
                if (!$this->mbVisible)
                        return "<!-- RemoveLayer widget hidden -->";
                return $this->moButton->DrawPublish();
        }
        /**
        * ParseURL
        *
        * Look for selected layers and move them UP
        */
        function  ParseURL()
        {
                if ($this->isVarSet('REMOVE_LAYER'.$this->mnId) &&
                $this->getVar('REMOVE_LAYER'.$this->mnId) == "1")
                {
                        $oMap = $this->moMapObject->oMap;

                        $aszSelectedLayers = array();
                        if ($this->isVarSet('SELECTED_LAYERS'))
                        {
                                $szSelectedLayers = $this->getVar( 'SELECTED_LAYERS' );
                                if (strlen($szSelectedLayers) > 0)
                                {
                                        $aszSelectedLayers = explode( ",", $szSelectedLayers );
                                }
                        }
                        else
                        {
                                $nLayers = $oMap->numlayers();
                                for ($i=0;$i<$nLayers;$i++)
                                {
                                        $oLayer=$oMap->getLayer($i);
                                        if ($oLayer->getMetaData("selected") == "1")
                                        array_push($aszSelectedLayers, $oLayer->name);
                                }
                        }

                        if (count($aszSelectedLayers) > 0)
                        {
                                $nLayers = $oMap->numlayers;
                                for($i=0; $i < $nLayers; $i++)
                                {
                                        $oLayer = $oMap->getLayer($i);
                                        if (in_array( $oLayer->name, $aszSelectedLayers ))
                                        {
                                                $oLayer->set( "status", MS_DELETE );
                                        }
                                }
                        }
                        $this->setVar('SELECTED_LAYERS', "");
                }
                return true;
        }
}
?>