I've coded a new fieldtype for my EE3 install. It works, but it doesn't look quite right in the control panel - the input fields only use up half of the available space. This looks fine for many fieldtypes, but I'd rather this stretch across the page, similar to a textarea or grid.
<fieldset class="col-group">
<div class="setting-txt col w-8">
<h3><span class="ico sub-arrow"></span>Fieldtype Name</h3>
</div>
<div class="setting-field col w-8 last">
<label for="fto_field_id_21">FieldType Option</label>
<input type="text" value="" name="field_id_21[fto]">
</div>
</fieldset>
In Firebug, I can change the class w-8 to w-16 and get the desired look. However, I don't know where in my fieldtype definition I would set that. I dropped the following in my install method:
return array('field_wide' => TRUE);
While it is added to the fieldtype's global settings, it has no effect on how it is displayed in the control panel.
How can I get this full column width fieldtype? Thanks.