UI: Disable edit transform if item is locked

[cg2121]

Description

The transform window was still accessible if the scene item was locked.

Motivation and Context

You shouldn't be able to edit the transform of a locked item.

How Has This Been Tested?

Locked/unlocked scene items to make sure the transform window was disabled.

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code has been run through clang-format.
• I have read the contributing document.
• My code is not on the master branch.
• The code has been tested.
• All commit messages are properly formatted and commits squashed where appropriate.
• I have included updates to all appropriate documentation.

[gxalpha]

I’d want @Warchamp7’s opinion on this, because as-is this is by design. IMO locking the preview should prevent accidental changes, but using the Edit Transform dialog isn’t accidental.

[GeorgesStavracas]

This seems fine from a UI / UX perspective

[PatTheMav]

I also agree with this change, it mimics learned behaviour from other pro tools where locking a layer usually locks all input fields of associated property widgets and windows as well.

@cg2121 what happens if I lock an item with an associated transform window open?

[cg2121]

If the window is opened, when the item is locked, the window is updated. This is what the lockSignal does in the code.