IMPROVEMENT: customize slide image size

app/src/Elements/SliderElement.php

@@ -24,10 +24,13 @@ class SliderElement extends ElementSlideshow
 
     private static $plural_name = 'Sliders';
 
-    private static $description = 'Displays slideshow';
+    private static $description = 'Displays slide show';
 
     private static $table_name = 'SliderElement';
 
+    private static $slide_width = 2140;
+    private static $slide_height = 700;
+
     private static $db = [
         'Interval' => 'Int',
     ];
@@ -47,6 +50,16 @@ class SliderElement extends ElementSlideshow
         return self::$singular_name;
     }
 
+    public function getSlideWidth()
+    {
+        return self::config()->get('slide_width');
+    }
+
+    public function getSlideHeight()
+    {
+        return self::config()->get('slide_height');
+    }
+
     public function getCMSFields()
     {
         $fields = parent::getCMSFields();
@@ -92,14 +105,14 @@ class SliderElement extends ElementSlideshow
      */
     public function getSlideShow()
     {
-        if($this->items) {
+        if ($this->items) {
             return $this->items;
         }
 
         $date = date('Y-m-d H:i:s');
         $this->items = $this->Slides()->filter([
             'Hide' => '0',
-        ])->filterByCallback(function($item, $list) use ($date) {
+        ])->filterByCallback(static function ($item, $list) use ($date) {
             $on = $item->getField('DateOn');
             $off = $item->getField('DateOff');
 
@@ -113,7 +126,7 @@ class SliderElement extends ElementSlideshow
     {
         parent::onBeforeWrite();
 
-        if(!$this->getField('Interval')){
+        if (!$this->getField('Interval')) {
             $this->setField('Interval', 5000);
         }
     }

app/src/Extensions/SlideImageExtension.php

@@ -4,16 +4,14 @@
  * User: tony
  * Date: 6/30/18
  * Time: 11:37 PM
+ * Ref: Dynamic\FlexSlider\Model\SlideImage
  */
 
 namespace Site\Extensions;
 
-use Sheadawson\Linkable\Forms\LinkField;
-use Sheadawson\Linkable\Models\Link;
 use SilverStripe\Forms\CheckboxField;
 use SilverStripe\Forms\DatetimeField;
 use SilverStripe\Forms\FieldList;
-use SilverStripe\Forms\TextField;
 use SilverStripe\Forms\ToggleCompositeField;
 use SilverStripe\ORM\DataExtension;
 
@@ -25,6 +23,29 @@ class SlideImageExtension extends DataExtension
         'DateOff' => 'Datetime',
     ];
 
+    private $_cache = [];
+
+    public function getElement()
+    {
+        if(!isset($this->_cache['element'])) {
+            $this->_cache['element'] = $this->owner->SlideshowElement();
+        }
+
+        return $this->_cache['element'];
+    }
+
+    public function getSlideWidth()
+    {
+        $element = $this->getElement();
+        return $element->getSlideWidth();
+    }
+
+    public function getSlideHeight()
+    {
+        $element = $this->getElement();
+        return $element->getSlideHeight();
+    }
+
     public function updateCMSFields(FieldList $fields)
     {
         parent::updateCMSFields($fields);
@@ -36,9 +57,14 @@ class SlideImageExtension extends DataExtension
             'DateOff',
         ]);
 
+
+        $fields->dataFieldByName('Image')
+            ->setTitle('Image ('.$this->getSlideWidth().' x '.$this->getSlideHeight().' px)');
+
         $fields->addFieldToTab('Root.Main', ToggleCompositeField::create(
             'ConfigHD',
-            'Slide Settings', [
+            'Slide Settings',
+            [
                 CheckboxField::create('Hide', 'Hide this slide? (That will hide the slide regardless of start/end fields)'),
                 DatetimeField::create('DateOn', 'When would you like to start showing the slide?'),
                 DatetimeField::create('DateOff', 'When would you like to stop showing the slide?'),

app/templates/Includes/SlideItem.ss

@@ -8,7 +8,7 @@
             <span class="img">
                 <img class="d-block w-100"
                     src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"
-                    data-lazy-src="<% if $ImageURL %>$ImageURL<% else %>$Image.Fill(1400,650).URL<% end_if %>"
+                    data-lazy-src="<% if $ImageURL %>$ImageURL<% else %>$Image.Fill($SlideWidth,$SlideHeight).URL<% end_if %>"
                     alt="<% if $Headline %>$Headline.XML<% end_if %>"
                 />
             </span>