Can I use a dependency to set entire record to read only?

We have done it recently.

Basically you need to create a custom rowaction field which automatically set itself as disabled given a trigger.

Find examples:

custom/clients/base/fields/unlink-action-deactivable/unlink-action-deactivable.js

({
extendsFrom: 'UnlinkActionField',

initialize: function(options) {
this._super("initialize", [options]);
},

bindDataChange: function() {
_.each(this.def.deactivable.triggerFields, function(field) {
this.context.parent.get('model').on('change:' + field, this.deactivate, this);
}, this);
},

deactivate: function() {
if(this.context != null) {
var context = new SUGAR.expressions.SidecarExpressionContext(this.parent, this.context.parent.get('model'), false);
var value = SUGAR.expressions.ExpressionParser.prototype.evaluate(this.def.deactivable.trigger, context).evaluate();

if(value == 'true') {
if(!this.getFieldElement().hasClass('disabled')) this.getFieldElement().addClass('disabled');
} else {
if(this.getFieldElement().hasClass('disabled')) this.getFieldElement().removeClass('disabled');
}
}
}
})

subpanel-list for a given module

'rowactions' => array(
'actions' => array(
array(
'type' => 'rowaction',
'css_class' => 'btn',
'tooltip' => 'LBL_PREVIEW',
'event' => 'list:preview:fire',
'icon' => 'fa-eye',
'acl_action' => 'view',
),
array(
'type' => 'unlink-action-deactivable',
'icon' => 'fa-chain-broken',
'label' => 'LBL_UNLINK_BUTTON',
'deactivable' => array(
'triggerFields' => array('status'),
'trigger' => 'or(isInList($status, createList("Closed", "Cancelado", "Pedido nao Postado")), not(isUserInList(createList("SIMM_GER", "SIMM_SUP"))))',
)
),
),
),

This solution, with minor adjustments, works oover any button (Edit, Save, Unlink, Add etc).

Regards

I haven't done any customizations with this before but perhaps a custom ACL rule would be best:

https://enricosimonetti.com/powerful-customisations-with-sugars-acl/

I like that solution, Enrico Simonetti's  example for: Conditional record locking through ACL’s customisation sounds exactly like what I need to do, I had seen that article some time ago and forgotten about that. Thank you Shad Mickelberry

And it worked like a charm! Thank you again Shad Mickelberry

Awesome. I'll have to keep this in mind myself. It comes up from time to time.