The Typo3 Configuration Array (TCA) configuration of the extension is very simple. The tree is a form element of type “select”. You can read about it in the chapter $TCA array reference in the “Typo3 Core APIs” documentation on www.typo3.org. In short it has a userFunc pointing to the function “displayCategoryTree” of the class “tx_ch_treeview”. I have introduced a new field “treeName” containing the unique name of the tree in the “feInterface” section. The name must be unique because I had an extension, where I needed multiple trees in the same form. I have introduced another field in the “ctrl” section. “TreeParentField” contains the name of the parent field of the table.

Example TCA of the extension:

ctrl section:

'title' => 'LLL:EXT:ch_treeview/locallang_db.xml:tx_chtreeview_example',

'label' => 'title',

'tstamp' => 'tstamp',

'crdate' => 'crdate',

'cruser_id' => 'cruser_id',

'default_sortby' => 'ORDER BY crdate',

'delete' => 'deleted',

'treeParentField' => 'parent_uid',

feInterface section:

<type>select</type>

<form_type>user</form_type>

<treeView>1</treeView>

<treeName>txchtreeviewexample</treeName>

<userFunc>tx_ch_treeview->displayCategoryTree</userFunc>

<foreign_table>tx_chtreeview_example</foreign_table>

<size>10</size>

<autoSizeMax>20</autoSizeMax>

<minitems>0</minitems>

<maxitems>20</maxitems>

treeParentField

treeName

treeMaxDepth