Horizon: Disable buttons when user doesn't fill mandatory fields

[Ido Ovadia]

Description of problem:
=======================
Many dialogs have mandatory fields.
Buttons in these dialogs should be disabled until user fill the mandatory fields.

Version-Release number of selected component (if applicable):
============================================================
python-django-horizon-2014.1-7.el7ost.noarch
openstack-dashboard-2014.1-7.el7ost.noarch

How reproducible:
=================
100%

Steps to Reproduce:
===================
1. Login to Horizon
2. Click 'Project' --> 'Compute' --> 'Images'
3. Click 'Create Image'

Actual results:
===============
Mandatory fields are empty but 'Create Image' button in enabled

Expected results:
=================
The button should be disabled until user fill the mandatory fields.

Additional info:
================
Two screenshots are enclosed

[Amit Prakash Pandey (amitpp23)]

But It is not creating an image. Instead it produces the error as :A image or external image location must be specified.

So I think its not a bug but a suggestion may be.
Still I would like to give it some time.

[Liz Blanchard (lblanchard)]

Right. This isn't technically a bug because it works as it was originally designed, but it would be a nice enhancement (however we'd like to track that). This would prevent the user from causing an error and instead push them to be sure they've entered all of the required criteria before continuing with the creation action.

If we were to apply something like this, I'd really like to see it applied in a way that is consistent across all of Horizon and not just to one modal at a time if possible.

[Akihiro Motoki (amotoki)]

As of Django 1.11, if some mandatory field(s) is not filled when a submit button is clicked, a message which suggest such field(s) are filled is shown based on 'required' attribute and the message is pop-ed by a modern browser like Chrome.
This is three years old and we fail to get an active assignee for a long time. Let's mark it as Incomplete so that the bug can be expired. Let's tackle it as a separate bug if filed.

[Launchpad Janitor (janitor)]

[Expired for OpenStack Dashboard (Horizon) because there has been no activity for 60 days.]