Subwindows and "back referencing" query

**celestian** · February 28th, 2018, 02:12

I'm trying to call a function from within 2 subwindows all the way back to the top. I'm having trouble finguring it out tho.

The setup is this.

windowclass(readycheck)
-subwindow(main)
--windowclass(ready_check_main)
---subwindow(main_user)
----windowclass(ready_check_entry_user)

From within ready_check_entry_user I want to have a button_checkbox via onValueChanged() refer back to a function in "readycheck".

I'm having trouble figuring out the "path" BACK to readycheck. window.function refers to the script within the windowclass "ready_check_entry_user" so that's not helpful. Been trying to figure out parentcontrol but that doesn't seem to get things back where I need either.

Anyone have some tips on how to reference backwards?

**damned** · February 28th, 2018, 02:22

Side trip - can you not do this by referencing the DB directly?

**celestian** · February 28th, 2018, 02:31

Originally Posted by damned

Side trip - can you not do this by referencing the DB directly?

There is no node associated with the subwindow that the button_checkbox resides. It's non-persistent data that I just need to know they clicked at that moment. I'm triggering a oob notify.

I'll attach the xml file.

**Trenloe** · February 28th, 2018, 03:19

You're probably going to have to string parentcontrol and subwindow together: https://www.fantasygrounds.com/refdoc/subwindow.xcp

When I need to work these out I will use lots of Debug.console commands outputting the control name or window instance class name.

So things like: window.getClass() or parentcontrol.getName() and then string them together - window.parentcontrol.getName() etc..

You'll get some nil errors, but it usually helps to go through it a few times to work out the exact hierarchy and how you can string the various API references together.

**celestian** · February 28th, 2018, 03:28

Originally Posted by Trenloe

You're probably going to have to string parentcontrol and subwindow together: https://www.fantasygrounds.com/refdoc/subwindow.xcp

When I need to work these out I will use lots of Debug.console commands outputting the control name or window instance class name.

So things like: window.getClass() or parentcontrol.getName() and then string them together - window.parentcontrol.getName() etc..

You'll get some nil errors, but it usually helps to go through it a few times to work out the exact hierarchy and how you can string the various API references together.

That was what I was trying to do and I got to window.parentcontrol.subwindow. After that I couldn't get any further back up. I'll look at the notes you linked and see if I can figure out why.

**Trenloe** · February 28th, 2018, 03:33

Originally Posted by celestian

That was what I was trying to do and I got to window.parentcontrol.subwindow. After that I couldn't get any further back up. I'll look at the notes you linked and see if I can figure out why.

Did you try window.parentcontrol.subwindow.window as the next step?

**celestian** · February 28th, 2018, 04:04

Originally Posted by Trenloe

Did you try window.parentcontrol.subwindow.window as the next step?

Yup, here is the code I ran from the button and the output I got.

Code:

          function onButtonPress()
            local sName = User.getUsername();
            window.notifyReadyCheck(sName,1);
            Debug.console("PC0","window",window);
            Debug.console("PC1","window.getClass()",window.getClass());
            Debug.console("PC2","window.subwindow",window.subwindow);
            Debug.console("PC3","window.parentcontrol",window.parentcontrol);
            Debug.console("PC4","window.parentcontrol.getName()",window.parentcontrol.getName());
            Debug.console("PC6","window.parentcontrol.subwindow",window.parentcontrol.subwindow);
            Debug.console("PC7","window.parentcontrol.subwindow.getClass()",window.parentcontrol.subwindow.getClass());
            Debug.console("PC8","window.parentcontrol.subwindow.window",window.parentcontrol.subwindow.window);
          end

Code:

Runtime Notice: s'PC0' | s'window' | windowinstance = { class = ready_check_entry_user, node = nil, x,y,w,h = 371,295,246,45 }
Runtime Notice: s'PC1' | s'window.getClass()' | s'ready_check_entry_user'
Runtime Notice: s'PC2' | s'window.subwindow' | nil
Runtime Notice: s'PC3' | s'window.parentcontrol' | subwindow = { x,y,w,h = 0,15,246,45 }
Runtime Notice: s'PC4' | s'window.parentcontrol.getName()' | s'main_user'
Runtime Notice: s'PC6' | s'window.parentcontrol.subwindow' | windowinstance = { class = ready_check_entry_user, node = nil, x,y,w,h = 371,295,246,45 }
Runtime Notice: s'PC7' | s'window.parentcontrol.subwindow.getClass()' | s'ready_check_entry_user'
Runtime Notice: s'PC8' | s'window.parentcontrol.subwindow.window' | nil
Script Error: [string ""]:1: attempt to index field 'window' (a nil value)

As you can see the "main_user" is right here:

windowclass(readycheck)
-subwindow(main)
--windowclass(ready_check_main)
---subwindow(main_user)<--------------
----windowclass(ready_check_entry_user)

**Trenloe** · February 28th, 2018, 04:08

OK, so window = ready_check_entry_user and window.parentcontrol.subwindow also = ready_check_entry_user.

So you've gone up then back down with subwindow.

How about window.parentcontrol.window?

**Trenloe** · February 28th, 2018, 04:10

The "Scope" section here might also give you some ideas: https://www.fantasygrounds.com/wiki/...pt_Block_Scope

For this you're probably going to need something like: window.parentcontrol.window.parentcontrol.window

**Bidmaron** · February 28th, 2018, 04:15

Celestian, I usually give up and create a temporary node in these cases because I can never walk back up very far. I create the node and then delete it when I'm done. A kluge, but I get brain damage trying to walk up window/subwindow hierarchies like that.

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