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In my custom form I have a file upload, which follows the array structure of file_element_info() in file.module in core. This is consistent with examples in examples module and date module has _date_api_element_info().

But looking at geofield or at openlayers and other modules I can not see what array values are possible/required.

As a general rule how do I find out how to add a field of a specific type to a custom form?

Edit #1: Just read Where can I find complete documentation of hook_field_info? and everyone is being really helpful about Field API, but it is a steep learning curve. A specific example would really help (an not one of the simple core field types).

Edit #2: So on my particular example in geofield.module I got (got the same using dpm(field_info_field_types('geofield'));):

function geofield_field_info() {
  return array(
    'geofield' => array(
      'label' => 'Geofield',
      'description' => t('This field stores geo information.'),
      'default_widget' => 'geofield_wkt',
      'default_formatter' => 'geofield_wkt',
      'instance_settings' => array(
        'local_solr' => array(
          'enabled' => FALSE,
          'lat_field' => 'lat',
          'lng_field' => 'lng',
        ),
      ),
      'property_type' => 'geofield',
      'property_callbacks' => array('geofield_property_info_callback'),
    ),
  );
}

But how does that translate to a form field array?

$form['location'] = array(
    '#title' => t('Location'),
    '#type' => 'geofield',
    '#required' => TRUE,
);

Or do I have the wrong end of the stick here?

In my custom form I have a file upload, which follows the array structure of file_element_info() in file.module in core. This is consistent with examples in examples module and date module has _date_api_element_info().

But looking at geofield or at openlayers and other modules I can not see what array values are possible/required.

As a general rule how do I find out how to add a field of a specific type to a custom form?

Edit #1: Just read Where can I find complete documentation of hook_field_info? and everyone is being really helpful about Field API, but it is a steep learning curve. A specific example would really help (an not one of the simple core field types).

Edit #2: So on my particular example in geofield.module I got (got the same using dpm(field_info_field_types('geofield'));):

function geofield_field_info() {
  return array(
    'geofield' => array(
      'label' => 'Geofield',
      'description' => t('This field stores geo information.'),
      'default_widget' => 'geofield_wkt',
      'default_formatter' => 'geofield_wkt',
      'instance_settings' => array(
        'local_solr' => array(
          'enabled' => FALSE,
          'lat_field' => 'lat',
          'lng_field' => 'lng',
        ),
      ),
      'property_type' => 'geofield',
      'property_callbacks' => array('geofield_property_info_callback'),
    ),
  );
}

But how does that translate to a form field array?

$form['location'] = array(
    '#title' => t('Location'),
    '#type' => 'geofield',
    '#required' => TRUE,
);

Or do I have the wrong end of the stick here?

In my custom form I have a file upload, which follows the array structure of file_element_info() in file.module in core. This is consistent with examples in examples module and date module has _date_api_element_info().

But looking at geofield or at openlayers and other modules I can not see what array values are possible/required.

As a general rule how do I find out how to add a field of a specific type to a custom form?

Edit: Just read Where can I find complete documentation of hook_field_info? and everyone is being really helpful about Field API, but it is a steep learning curve. A specific example would really help (an not one of the simple core field types).

In my custom form I have a file upload, which follows the array structure of file_element_info() in file.module in core. This is consistent with examples in examples module and date module has _date_api_element_info().

But looking at geofield or at openlayers and other modules I can not see what array values are possible/required.

As a general rule how do I find out how to add a field of a specific type to a custom form?

Edit #1: Just read Where can I find complete documentation of hook_field_info? and everyone is being really helpful about Field API, but it is a steep learning curve. A specific example would really help (an not one of the simple core field types).

Edit #2: So on my particular example in geofield.module I got (got the same using dpm(field_info_field_types('geofield'));):

function geofield_field_info() {
  return array(
    'geofield' => array(
      'label' => 'Geofield',
      'description' => t('This field stores geo information.'),
      'default_widget' => 'geofield_wkt',
      'default_formatter' => 'geofield_wkt',
      'instance_settings' => array(
        'local_solr' => array(
          'enabled' => FALSE,
          'lat_field' => 'lat',
          'lng_field' => 'lng',
        ),
      ),
      'property_type' => 'geofield',
      'property_callbacks' => array('geofield_property_info_callback'),
    ),
  );
}

But how does that translate to a form field array?

$form['location'] = array(
    '#title' => t('Location'),
    '#type' => 'geofield',
    '#required' => TRUE,
);

Or do I have the wrong end of the stick here?