Add a button to set all linked properties in the inspector

[Kartopod]

There are a lot of instances in the editor inspector where there are linked properties whose values you want to set to the same value. At the moment, since they're separate properties, setting them all to the same value individually is very cumbersome.

For example: In a StyleBoxFlat, there are the Border Width, Corner Radius, Expand Margin and Content Margin properties.

Of course, it still makes sense that they should be separate properties, because sometimes you do indeed want to have different values for them, but an input field (Or a button that pops up an input field) to set all the values of a linked property at once would greatly improve the user experience.

[aXu-AP]

Agree, this would be a good QoL improvement. Such thing exists for scale, so it should look similiar:

Another area which would benefit from this: RichTextLabel's font sizes:

[tetrapod00]

Yeah, I've been wanting something like this for a while now. I agree this is a good default UI to match current behavior in the editor.

The VectorN linking is implemented here, and in the rest of this file. But that linking only deals with the subproperties of a single property. Doing something similar for multiple properties would have to reimplement similar code elsewhere.

https://github.com/godotengine/godot/blob/97ef3c837263099faf02d8ebafd6c77c94d2aaba/editor/editor_properties_vector.cpp#L236L242

[Mickeon]

I've always had the idea that you should be able to select multiple properties/spin sliders in the Inspector by holding CTRL, but in practice I'm not sure how complex that would be.

[Kartopod]

@Mickeon Blender's UX for this is extremely good:

• Dragging vertically allows selection of multiple fields, after the first horizontal dragging is detected, vertical selection is locked.
• You can also drag on only a few fields.
• Dragging fields that have different values selects and sets them to the value you started dragging from.
• 'Selecting' fields allows you to manually input the same value to multiple fields.
  

[aXu-AP]

There's a few things I don't particularly like in Blender's approach:

• It's easy to accidentally move mouse horizontally before you reach all the fields (could be fixed with bigger margins).
• You can select only neighboring elements.

Overall it does feel good and I do use it in Blender. But I like @Mickeon 's suggestion better (it's also likely easier to implement).

[Kartopod]

That's fair. Just to throw around my thoughts aswell, I love how effortless it is to drag over all the fields and affect them at once. Pecking and choosing like how @Mickeon suggested would definitely help make the UX better than what it is now, but I feel like there would still be some friction when you want to set all the values together.

This is especially the case with the theme properties (eg: Corner Radius) because 90% of the time you want to quickly set all four of them to the same value. Having to click each one (imo) would still be very slow.

[aXu-AP]

If we implemented multiselect, shift clicking to choose consecutive properties should also work.