Add deferred markers loading.

module/dca/tl_leaflet_layer.php

@@ -108,6 +108,7 @@ $GLOBALS['TL_DCA']['tl_leaflet_layer'] = array
         'default' => array(
             'title'    => array('title', 'alias', 'type'),
             'active'   => array('active'),
+            'expert'   => array('deferred'),
         ),
         'markers extends default' => array(
             '+title' => array('markerCluster'),
@@ -240,5 +241,13 @@ $GLOBALS['TL_DCA']['tl_leaflet_layer'] = array
             ),
             'sql'              => "varchar(255) NOT NULL default ''"
         ),
+        'deferred'  => array
+        (
+            'label'     => &$GLOBALS['TL_LANG']['tl_leaflet_map']['deferred'],
+            'exclude'   => true,
+            'inputType' => 'checkbox',
+            'eval'      => array('tl_class' => 'w50', 'submitOnChange' => false),
+            'sql'       => "char(1) NOT NULL default ''"
+        ),
     )
 );

src/Netzmacht/Contao/Leaflet/MapService.php

@@ -17,7 +17,7 @@ use Netzmacht\Contao\Leaflet\Model\LayerModel;
 use Netzmacht\Contao\Leaflet\Model\MapModel;
 use Netzmacht\LeafletPHP\Assets;
 use Netzmacht\LeafletPHP\Definition\GeoJson\FeatureCollection;
-use Netzmacht\LeafletPHP\Definition\GeoJson\FeatureCollectionAggregate;
+use Netzmacht\LeafletPHP\Definition\GeoJson\ConvertsToGeoJson;
 use Netzmacht\LeafletPHP\Definition\Map;
 use Netzmacht\LeafletPHP\Definition\Type\LatLngBounds;
 use Netzmacht\LeafletPHP\Leaflet;

src/Netzmacht/Contao/Leaflet/Mapper/Layer/MarkersLayerMapper.php

@@ -11,7 +11,6 @@
 
 namespace Netzmacht\Contao\Leaflet\Mapper\Layer;
 
-
 use Netzmacht\Contao\Leaflet\Mapper\DefinitionMapper;
 use Netzmacht\Contao\Leaflet\Mapper\GeoJsonMapper;
 use Netzmacht\Contao\Leaflet\Model\MarkerModel;
@@ -20,6 +19,7 @@ use Netzmacht\LeafletPHP\Definition\GeoJson\FeatureCollection;
 use Netzmacht\LeafletPHP\Definition\Group\LayerGroup;
 use Netzmacht\LeafletPHP\Definition\Type\LatLngBounds;
 use Netzmacht\LeafletPHP\Definition\UI\Marker;
+use Netzmacht\LeafletPHP\Plugins\Ajax\GeoJsonAjax;
 
 class MarkersLayerMapper extends AbstractLayerMapper implements GeoJsonMapper
 {
@@ -37,24 +37,39 @@ class MarkersLayerMapper extends AbstractLayerMapper implements GeoJsonMapper
      */
     protected static $type = 'markers';
 
+    /**
+     * {@inheritdoc}
+     */
+    protected function createInstance(\Model $model, DefinitionMapper $mapper, LatLngBounds $bounds = null)
+    {
+        if ($model->deferred) {
+            $reflector = new \ReflectionClass('Netzmacht\LeafletPHP\Plugins\Ajax\GeoJsonAjax');
+            $instance  = $reflector->newInstanceArgs($this->buildConstructArguments($model, $mapper, $bounds));
+
+            return $instance;
+        }
+
+        return parent::createInstance($model, $mapper, $bounds);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
     protected function doBuild(
         Definition $definition,
         \Model $model,
         DefinitionMapper $builder,
         LatLngBounds $bounds = null
     ) {
-        if ($definition instanceof LayerGroup) {
+        if ($definition instanceof GeoJsonAjax) {
-            $collection = MarkerModel::findBy(
+            $base = \Config::get('websitePath') . '/system/modules/leaflet/public/geojson.php?id=';
-                array('active=1', 'pid=?'),
+            $definition->setUrl($base . $model->id);
-                array($model->id)
+        } elseif ($definition instanceof LayerGroup) {
-            );
+            $collection = $this->loadMarkerModels($model);
 
             if ($collection) {
                 foreach ($collection as $item) {
-                    $marker = new Marker('marker_' . $item->id, $item->coordinates);
+                    $definition->addLayer($this->createMarker($item));
-                    $marker->setTitle($item->tooltip);
-
-                    $definition->addLayer($marker);
                 }
             }
         }
@@ -69,22 +84,43 @@ class MarkersLayerMapper extends AbstractLayerMapper implements GeoJsonMapper
      */
     public function handleGeoJson(\Model $model, DefinitionMapper $mapper, LatLngBounds $bounds = null)
     {
-        $feature = new FeatureCollection();
+        $feature    = new FeatureCollection();
-
+        $collection = $this->loadMarkerModels($model);
-        $collection = MarkerModel::findBy(
-            array('active=1', 'pid=?'),
-            array($model->id)
-        );
 
         if ($collection) {
             foreach ($collection as $item) {
-                $marker = new Marker('marker_' . $item->id, $item->coordinates);
+                $feature->addFeature($this->createMarker($item)->getFeature());
-                $marker->setTitle($item->tooltip);
-
-                $feature->addFeature($marker->getFeature());
             }
         }
 
         return $feature;
     }
+
+    /**
+     * @param $item
+     *
+     * @return Marker
+     */
+    protected function createMarker($item)
+    {
+        $marker = new Marker('marker_' . $item->id, $item->coordinates);
+        $marker->setTitle($item->tooltip);
+
+        return $marker;
+    }
+
+    /**
+     * @param \Model $model
+     *
+     * @return \Model\Collection|null
+     */
+    protected function loadMarkerModels(\Model $model)
+    {
+        $collection = MarkerModel::findBy(
+            array('active=1', 'pid=?'),
+            array($model->id)
+        );
+
+        return $collection;
+    }
 }