Hi

I'm having trouble with something and it's just occurred to me that it may be impossible to implement.

I want to create an imagefield that only allows the user to select existing images. I'm currently trying to implement a dropdown of images but I'm having trouble.

Here's what I've got so far.

$images = DataObject::get("Image", "ParentID = 5");
	$images->toDropdownMap("ID", "Image", $emptyString = "--select--");

$imageField = new DropdownField('Photo', 'Choose an image', $images);

I tried a treedropdownfield but I need a thumbnail of the image, not just the title.

I also tried this.

class OneFolderImageField extends ImageField {
 
	function __construct($name, $title, $value = null, $form = null, $rightTitle = null, $folderName = null) {
		$folder = Folder::findOrMake($folderName);
		$this->folderName = $folderName;
		parent::__construct($name, $title, $value = null, $form = null, $rightTitle = null, $folder->Name);
	}
 
	public function EditFileForm() {
		$filter = create_function(
			'$item', '
			$folder = Folder::findOrMake(\''.$this->folderName.'\');
				return
					(in_array("Image", ClassInfo::ancestry($item->ClassName)) && $item->ParentID == $folder->ID)
					||
					(in_array("Folder", ClassInfo::ancestry($item->ClassName)) && $item->ID == $folder->ID)
		;');
		$form = parent::EditFileForm();
		$form->dataFieldByName('ExistingFile')->setFilterFunction($filter);
		return $form;
	}
 
}

$imageField = new OfferImageField('Photo', 'Photo', 'Photo', $this, 'Test', $folderName);

Thanks in advance.

Correction

After many long hours of trying many different convoluted methods it turns out all I need to do to get rid of the upload from computer option was this.

$imageField->setCanUploadNewFile(false);

I found it buried here http://api.silverstripe.org/2.4/forms/fields-files/FileIFrameField.html#methodsetCanUploadNewFile

Works in 2.4.7