Module category list selection in back office

[polaije]

Hello,

I am new in module developement but I follow the documentation to get a new module to work with a render form.

I can just display one textbox in the display form and I need to add a selection of categories. I found this code that works perfectly but without saving the selected values.

 

public function getContent() {

   $categoryTree = new HelperTreeCategories('categories-tree', $this->l('Check the category to display the link'));
  $categoryTree->setUseCheckBox(1);

  return $categoryTree.$this->displayForm();

}

How can I submit this form to retrieve the selected categories ?

 

Thanks in advance helping me,

Jean

 

 

Edited October 28, 2017 by polaije (see edit history)

[polaije]

I forgot to say that I am in PS 1.7 but my module is using the old 1.4 structure without render form.

The result on the form is what I expect (see jpg attached) but now I want to retrieve the selected categories. How is the $categoryTree structured ?

Jean