Manual Content: Flexpanel needs note that reusing structs when creating nodes will modify the original struct rather than the flexpanel

[iampremo]

Description

If you create a flexpanel node from a variable that contains a struct, then edit the node, the original struct will have those changes.

The new node seems to use the struct to store its data so all nodes will use the same.

Steps To Reproduce

Debug sample
Notice that the 3 panels say "something else 3"
Pause debugger
Inspect "template_struct"
Notice that the data.text value is "something else 3"

Which version of GameMaker are you reporting this issue for?

IDE v2024.1100.0.711 Runtime v2024.1100.0.726

Which operating system(s) are you seeing the problem on?

Windows 10.0.22631.0

Which platform(s) are you seeing the problem on?

Windows

7b2df5ed-f41d-403a-be6d-a473c57f2ded

[rwkay]

This is not a bug in the engine but you need to ensure that the data struct from your template is unique for each node that is created from it - as it stands they will all point at the same struct.

you need to add this line after your flexpanel_create_node call

	flexpanel_node_set_data( _new_node, variable_clone( flexpanel_node_get_data(_new_node) ) );

[YYDan]

We'll verify the manual changes.

[YYDan]

Can see that the manual change documents the problem and the correct workaround to add into your code. All seems correct to me.

Verifying.