Hi,

with DOM enabled users can not drag and drop files to other folders in "Files & Images".
There is a setting to disable DOM for the assets folder: DataObjectManager::allow_assets_override

Since one of our customers wants dom enabled most the time, but sometimes needs to move files we added a config option for him:
Create a file named "CustomAssetAdmin.php":

<?php
 class CustomAssetAdmin extends DataObjectDecorator {
   function init() { 
		$config = SiteConfig::current_site_config(); 
		DataObjectManager::allow_assets_override($config->DomAllowAssetsOverride);
   } 
}
?>

Add the option to your siteconfig: "CustomSiteConfig.php":

<?php
 class CustomSiteConfig extends DataObjectDecorator {
     
    function extraStatics() {
        return array(
            'db' => array(
				'DomAllowAssetsOverride' => 'boolean'
			)
        );
    }
   
    public function updateCMSFields(FieldSet &$fields) {
      $fields->addFieldToTab('Root.Settings', new CheckBoxField('DomAllowAssetsOverride','DOM in "Dateien und Bilder" verwenden?'));	    }
}
?>

Add these to your _config.php

DataObject::add_extension('SiteConfig', 'CustomSiteConfig');
Object::add_extension('AssetAdmin', 'CustomAssetAdmin');

That gives your users the option to enable/disable DOM for the assets folder on demand.

Johannes