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    Empty groups get deleted?!

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    • jolranJ Offline
      jolran
      last edited by

      Maybe the code is between a start and commit operation? Doesent Sketchup garbage collect then?
      I don't think this is unusual, seen several hacks around conserning this. But they where rather old and I can't remember where I saw it. Maybe there's a better fix as Aerilius says...

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      • thomthomT Offline
        thomthom
        last edited by

        SketchUp will remove empty definitions from the model. Even definitions of ComponentInstances. Think it usually happens on commit - but there might be other triggers as well. Always seen this as part of the automatic cleanup.

        Thomas Thomassen β€” SketchUp Monkey & Coding addict
        List of my plugins and link to the CookieWare fund

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        • Dan RathbunD Offline
          Dan Rathbun
          last edited by

          @thomthom said:

          SketchUp will remove empty definitions from the model. Even definitions of ComponentInstances.

          definitions ??

          I thought it was empty instances that were GC'd ?

          I'm not here much anymore.

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          • TIGT Offline
            TIG Moderator
            last edited by

            It's a know way of removing an unused definition from the Component Browser without recourse to definitions.purge_unused, which of course might also remove components that the users has not yet got inserted, but would like to keep for later...
            definition.entities.clear!
            within a start/commit block will remove the definition.
            Similarly group.entities.clear!, although in that case group.erase! will work BUT can can fall foul of some new BIMish ill-advised entities-observers... πŸ˜’

            TIG

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            • thomthomT Offline
              thomthom
              last edited by

              @dan rathbun said:

              @thomthom said:

              SketchUp will remove empty definitions from the model. Even definitions of ComponentInstances.

              definitions ??

              I thought it was empty instances that were GC'd ?

              Instances are just references to definitions. And it's not garbage collection - if it had been then they would not have disappeared when you have reference to them. It's SketchUp cleaning up.

              Thomas Thomassen β€” SketchUp Monkey & Coding addict
              List of my plugins and link to the CookieWare fund

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              • thomthomT Offline
                thomthom
                last edited by

                @dan rathbun said:

                @thomthom said:

                SketchUp will remove empty definitions from the model. Even definitions of ComponentInstances.

                definitions ??

                I thought it was empty instances that were GC'd ?

                You're not talking about Ruby instances, right?

                Thomas Thomassen β€” SketchUp Monkey & Coding addict
                List of my plugins and link to the CookieWare fund

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                • Dan RathbunD Offline
                  Dan Rathbun
                  last edited by

                  No. Back on the topic of the OP,... he was asking about group instances that get GC'd before he can use them, because they are empty.

                  I'm not here much anymore.

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                  • thomthomT Offline
                    thomthom
                    last edited by

                    Andreas as the first one to mention the GC. The OP only said the group was deleted - which is what happens to definitions when they are empty.

                    @niccah said:

                    okay, I insert now a small edge and hide the full group... when the user insert his first objects, I delete this line and make the group again visible...

                    Why not create the group only right before you need to add something to it?

                    Thomas Thomassen β€” SketchUp Monkey & Coding addict
                    List of my plugins and link to the CookieWare fund

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                    • N Offline
                      niccah
                      last edited by

                      At first! Thank you very much again for all your comments! I'm always learning a lot, "listening" to your discussions!

                      @thomthom said:

                      Why not create the group only right before you need to add something to it?

                      Following idea:

                      • the user can create a "project" => so, in my code, I create at first an empty group
                      • all the projects will be listed in a table
                      • now, the user can add to a single project some "parts"

                      So, my current problem:

                      • user create a project, and then he / her starts to draw the "part" => during drawing, the empty project group will be removed by GC...

                      My hidden line in the groups works perfect! I know, it not realy smart, but...

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                      • thomthomT Offline
                        thomthom
                        last edited by

                        That's where I ask: why do you need to create the group in advance before you actually make use of it? Seems to me it complicates things a little when you try to fight SketchUp for the group - slapping its wrist using hidden temp geometry.

                        Thomas Thomassen β€” SketchUp Monkey & Coding addict
                        List of my plugins and link to the CookieWare fund

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                        • N Offline
                          niccah
                          last edited by

                          @thomthom said:

                          That's where I ask: why do you need to create the group in advance before you actually make use of it? Seems to me it complicates things a little when you try to fight SketchUp for the group - slapping its wrist using hidden temp geometry.

                          πŸ˜„ Okay, let me "answer" with a new question - what can I do else? πŸ˜„ The user would like to create a project => so, somewhere I have to save this information about the projects (name, options, etc, ..). And the user could create a project and close Sketchup => so, the information about the new project has to be saved somewhere "for ever".

                          I realy agree, my way is realy complicated...

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                          • Dan RathbunD Offline
                            Dan Rathbun
                            last edited by

                            OK major problem with your logic.

                            In Ruby you can cause the current editing context (the "project" group,) to be exited, via:
                            model#close_active()

                            BUT there is no API method to enter INTO an editing context. (You cannot cause the "project" group to become active for edit.)

                            I'm not here much anymore.

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                            • Chris FullmerC Offline
                              Chris Fullmer
                              last edited by

                              @niccah said:

                              The user would like to create a project => so, somewhere I have to save this information about the projects (name, options, etc, ..). And the user could create a project and close Sketchup => so, the information about the new project has to be saved somewhere "for ever".

                              Use an attribute dictionary to attach information to the model. It will stay with it after the model is closed and opened.

                              Single Dictionatires
                              http://www.sketchup.com/intl/en/developer/docs/ourdoc/attributedictionary

                              Collections of multiple dictionaries
                              http://www.sketchup.com/intl/en/developer/docs/ourdoc/attributedictionaries

                              This is a much more stable way to maintain data in the model from session to session.

                              Chris

                              Lately you've been tan, suspicious for the winter.
                              All my Plugins I've written

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