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Can't change populated values back to null #337
Description
Once a json field has a value, you cannot set it back to null in the map editor. For example, if you create a SHOW_CHOICE event step, all the fields are initially blank/null. Once you enter a value, save it, then close the event editor, it is no longer able to go back to null. You cannot delete this value because it map editor will re-populate it.
In the screenshot above, if I want to set the forceWidth field to a null value again, I either need to make an entirely new SHOW_CHOICE event step or I need to remove it manually in json.
This also works for boolean checkbox properties. In the screenshot below, the top SET_CAMERA_POS is a freshly-created event step, thus all values are currently null. Once you touch the checkbox for the wait property, you can only set it to true or false. You can't get rid of it from the editor now.
This is all just a minor annoyance, not anything critical. I can always still manually work around this.
Activity
Vegita2 commentedon Sep 28, 2025
Should that be an empty string or is "null" strictly required?
What's the use case for having null there? Does it behave differently than false?
XenonA7 commentedon Sep 28, 2025
When you first create a new SHOW_CHOICE, the fields are blank. If you leave it blank, the forceWidth property simply doesn't get added to the json output at all. This is different than just having
"forceWidth": "". I would like a way to go back to this somehow once the field is populated.I had copied an EventTrigger containing this SHOW_CHOICE and I wanted to modify it to not use forceWidth or columns. But that wasn't possible, thus why I created this issue. I solved it by creating a brand new SHOW_CHOICE and copying the other field values without touching columns/forceWidth.
It's not a use case that has unique behavior, but I always leave unused fields empty if I don't need them. Otherwise I will be wondering why there is a discrete value there and get confused wondering what purpose it is serving later. It would just be nice to be able to go back to a null value without having to do it in json or create a fresh event step and repopulate everything else each time.
It behaves the same as the default value which is not necessarily boolean or false. For example, ig.EVENT_STEP.ADD_TIMER has the "gui" property set to true by default if you leave it as null.
Vegita2 commentedon Sep 28, 2025
How would you add the ui for it? As I understand that would require having some kind of additional control on every attribute to unset it
2767mr commentedon Sep 28, 2025
We could use the clear button for it
(and similar controls for other elements)
XenonA7 commentedon Sep 28, 2025
I'd like to be able to delete the "220" value from the forceWidth field in the original screenshot and have it register that as null. I'm not sure about true/false checkboxes or other scenarios.
Vegita2 commentedon Sep 30, 2025
is there a difference between
null,undefinedand the field not existing? If not then I'd say the cleanest solution is to omit the fieldXenonA7 commentedon Oct 1, 2025
I don't know if there is a difference between a blank value like
"forceWidth": ""and simply omitting the field. But I can't think of a reason why it would be desirable to have anything besides an omission. It is also cleaner in the json.