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  • D Offline
    Dan Rathbun
    last edited by 12 Jan 2010, 16:56

    _
    Sketchup::SelectionObserver

    This observer needs fixing! I would put this in the high priority group.

    Per ThomThom's Observer Review "State of Observers"
    http://forums.sketchucation.com/viewtopic.php?f=180&t=20676&start=0#p173630

    Sketchup::SelectionObserver

    .onSelectionAddednever triggers
    .onSelectionRemovednever triggers.

    Instead,
    .onSelectionBulkChangeand .onSelectionClearedalways triggers.
    _

    I'm not here much anymore.

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    • T Offline
      thomthom
      last edited by 21 Jan 2010, 14:37

      Why doesn't this observer have its own class documented as the other observers? http://code.google.com/intl/nb/apis/sketchup/docs/ourdoc/pages.html#add_frame_change_observer

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

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      • D Offline
        Dan Rathbun
        last edited by 21 Jan 2010, 19:15

        FrameChangeObserver

        @thomthom said:

        Why doesn't this observer have its own class documented as the other observers? http://code.google.com/intl/nb/apis/sketchup/docs/ourdoc/pages.html#add_frame_change_observer

        I would guess that this was a pre-version 6 observer implementation, added before they 'set a standard' in version 6 for true observer prototypes defined under the Sketchup module. And that when they did add those formally defined Observer classes in version 6, this one fell through the cracks.

        I checked the Object list... and there is no observer prototype named 'FrameChangeObserver' defined.
        I checked the Sketchup::Pages class for it's methods:

        pages.public_methods(false).sort
        ["[]", "add", "add_matchphoto_page", "add_observer", "count", "each", "erase", "parent", "remove_observer", "selected_page", "selected_page=", "show_frame_at", "size", "slideshow_time"]
        

        There are NO methods:

        • add_frame_change_observer* remove_frame_change_observer
          This information is OBSOLETE in the API, and should be removed.

        A coder (currently) would have to use the Sketchup::ViewObserver, onViewChanged method to detect when the change of view finished.

        IF there is a need (for the functionality of a FrameChangeObserver,) you might propose a Sketchup::AnimationObserver class that has this callback function and perhaps others?

        Jim might want to weigh in on this, as he has been working on Animation lately.

        @Jim : Questions:

        • Would an attached AnimationObserver be expected to slow the framerates?* Would an AnimationObserver even be necessary? (As really the Animation interface, is somewhat like an observer itself. The pause, resume and stop methods act like observer callbacks.)
          _

        I'm not here much anymore.

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        • P Offline
          ptitjes
          last edited by 29 Jan 2010, 11:25

          @dan rathbun said:

          _
          Sketchup::SelectionObserver

          This observer needs fixing! I would put this in the high priority group.

          I highly second that request! SelectionObserver is broken.

          @dan rathbun said:

          Per ThomThom's Observer Review "State of Observers"
          http://forums.sketchucation.com/viewtopic.php?f=180&t=20676&start=0#p173630

          Sketchup::SelectionObserver

          .onSelectionAddednever triggers
          .onSelectionRemovednever triggers.

          Instead,
          .onSelectionBulkChangeand .onSelectionClearedalways triggers.
          _

          Here even onSelectionCleared is not even triggered. (SU 7.1 (7.1.5803) on MacOS SnowLeaopard) This makes working on selections quite impossible and you can't do that in a right way.

          Also, plugins should be loaded before any new model is created in SU. Because AppObservers are not triggered for the initial new model open when lauching sketchup.

          Both those issues could be easily fixed. I don't know whether sketchup dev team is reading this forum, but please fix that!

          Didier.

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          • T Offline
            thomthom
            last edited by 29 Jan 2010, 11:35

            @ptitjes said:

            Both those issues could be easily fixed. I don't know whether sketchup dev team is reading this forum, but please fix that!

            This post was started by a Google Sketchup employee. πŸ˜‰

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

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            • D Offline
              Dan Rathbun
              last edited by 30 Jan 2010, 23:12

              Sketchup::AppObserver

              Anyone interested in any of the following event methods?

              Extensions
              Sketchup.register_extension**%(#BF0000)[onRegisterExtension( extObj, loadFlag, regResult )
              onLoadExtension( extObj, loadResult )]**

              • onUnloadExtension needs fixing. Currently passes the extension name, BUT text names are not necessarily unique, for example there are several extensions, by several different authors called "SelectionMemory".
                In addition what would we do with a textname anyway? There is no method to find an ExtensionObject by searching using a textname, as well as even having access to the ExtensionsCollection/Manager.
                We definately need the object handle passed, then we can access any of the extensions attributes, including the name, example:

                onUnloadExtension( extObj )

              Internet Connection
              IF Sketchup.is_online returns false, an Observer could be used to watch for an when an Internet Connection is established. This may be needed for some extensions that download help information, or textures or other files from the internet (especially when the user has a dial-up connection.)
              %(#BF0000)[onInternetConnect
              onInternetDisconnect]

              Send Action
              fired by Sketchup.send_action%(#BF0000)[onBeforeSendAction( action )
              onAfterSendAction( action, result )]

              Thumbnails Bulk events
              Would likely be used by Gallery or webpage generator Plugin extensions.
              %(#BF0000)[onAfterSaveThumb( obj, img, result )
              onBeforeSaveThumb( obj, img )]

              When fired by:
              %(#BF0000)[ComponentDefinition.save_thumbnail
              Model.save_thumbnail
              View.write_image]
              (if img is thumbSize)

              • obj is the source object handle* img is the output imgStringPathname
                When fired by:
                Sketchup.save_thumbnail

              • obj is the input skpStringPathname* img is the output imgStringPathname
                _

              I'm not here much anymore.

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              • T Offline
                thomthom
                last edited by 31 Jan 2010, 01:26

                Can't say I've ever wanted/needed those events. It's the events that relates to model changes that I'd wish where working reliably.

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

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                • dkendigD Offline
                  dkendig
                  last edited by 25 Feb 2010, 17:27

                  We have always had a hard time ensuring our plugin's data is properly serialized in to the scene prior to a save. Now we serialize after every - single - change... and it slows things down a little. The proposed solution for onSaveModel would be wonderful... oh please magical Google genies... please fix these observer issues. Here's a post we put in the discussion groups a while back when we were pulling our hair out:

                  http://groups.google.com/group/Ruby-API/browse_thread/thread/bf156b08bdb9ba71/5b9ac6cc4a3bb83c#5b9ac6cc4a3bb83c

                  Devin Kendig
                  Developer

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                  • T Offline
                    tomot
                    last edited by 24 Jun 2010, 17:52

                    It really bugs me! when I'm doing a load "Filename.rb" into the Ruby Console, that the revised "Filename.rb" may run as expected, only to find out that "Filename.rb" really didn't work. because I had not actually quit the currently running SU.

                    I'm not sure if this is an Observer issue: It would be really nice if there was a closer OBSERVATION on the part of the API that scripts work or don't work. I don't ever recall having to Quit AutoCad, and restarting it each time I was testing Lisp routines.

                    In fact GLD is Archicad's API, is even more elegant, the code is written totally within the ArchiCad application in its own GLD window, errors are flagged without ever having to quit the main ArchiCad application.

                    [my plugins](http://thingsvirtual.blogspot.ca/)
                    tomot

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                    • D Offline
                      Dan Rathbun
                      last edited by 24 Jun 2010, 21:12

                      @tomot said:

                      It really bugs me! when I'm doing a load "Filename.rb" into the Ruby Console, that the revised "Filename.rb" may run as expected, only to find out that "Filename.rb" really didn't work. because I had not actually quit the currently running SU.

                      Is ALL of the code written in the "Filename.rb" wrapped within a second level module block?
                      It should be.
                      When it is, from the console, you can type:
                      <1stLevelModule>.module_eval('remove_const :<2ndLevelModule>')
                      and the entire 2nd Level module should be undefined. Then type
                      GC.start to run garbage collection.
                      Then you can reload your script, and redefine the second level module.

                      What I'm saying is that all of your plugins should be inside modules, which are ALL inside a master module that is YOUR namespace, such as "Tomot".
                      example:

                      module Tomot
                        module My_Plugin_One
                          # CONSTANTS
                          # @@module vars
                          # class definitions
                          # method definitions
                          begin
                            # run once code
                          end
                        end # My_Plugin_One
                      end # Tomot
                      

                      Then when you wish to reload (at the console):
                      Tomot.module_eval('remove_const :My_Plugin_One')
                      GC.start
                      load 'tomot/plugin_one.rb'
                      (You might even put that in a temporary Tomot module method, to automate the cleanup and reload of any Tomot submodule or subclass, etc. Make a couple of constants Tomot::MODNAME and Tomot::MODPATH that you can change at will, and have the method use those constant's String values in the 1st and 3rd lines, respectively.) Sorta like this:

                      
                      Tomot.const_set(;MODNAME,'My_plugin_One')
                      Tomot.const_set(;MODPATH,'tomot/plugin_one.rb')
                      def Tomot.reload
                        module_eval( "remove_const ;#{MODNAME}" )
                        GC.start
                        load("#{MODPATH}")
                      end
                      
                      

                      You'd repeat the process, for other plugins, always defining them WITHIN your master namespace (module Tomot,) and each WITHIN it's own submodule. Yes if you create classes that are common to more than one of your plugins, they can be defined at the 2nd level, directly under Tomot, and they ALSO can be removed and reloaded because the name of a Class, is also a constant (just as a module identifier is.)

                      Top Level modules and classes (which should only be the Ruby base classes and modules,) cannot be removed (by design.)

                      Now this will not solve ALL of the challenges with SU API developement, because many objects are really C++ objects and cannot be garbage collected by Ruby. But we can reduce many of the problems, by at least coding on the Ruby side, in the proper Ruby way.
                      There have been many discussions in the forum on unattaching and 'cleaning up' observers.

                      As far as reloading SU. Sometimes it just must be done, especially if your working with menus. We cannot at present remove menu items.
                      To make things faster, in development, I have a bare-bones Sketchup copy with minimal development plugins only (and the DC extension,) that loads fast. On Windows, we can run Sketchup differently, by using extra user accounts, and using RunAs.. to access these differnt setups from the main user account.
                      See my posts Saving multiple workspaces (and run batch file from ruby as admistrator perhaps if you wanted to use a batchfile and icons.)

                      Now.. I agree with you and others, it would be great to have a good bridge between Ruby GC and C++ GC (if that's what it's called in C++.) So that things get cleaned on both sides when no longer in use.

                      I'm not here much anymore.

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                      • T Offline
                        tomot
                        last edited by 25 Jun 2010, 01:12

                        Dan: Thank you for your detailed explanation. Early on when I first looked at Ruby scripting, I knew nothing about Ruby and I still know very little. Many of the examples I used were from donated scripts, from which I borrowed and referenced code to develop my own self taught scripts, there were no module examples to speak or copy from. Its easy to see why not more people get engaged with Ruby.
                        To a novice trying to make sense of the current SU Ruby API descriptions and examples, is like shining a light on a subject without a battery in the flashlight. πŸ˜„

                        [my plugins](http://thingsvirtual.blogspot.ca/)
                        tomot

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                        • D Offline
                          Dan Rathbun
                          last edited by 25 Jun 2010, 06:49

                          @tomot said:

                          Many of the examples I used were from donated scripts, from which I borrowed and referenced code to develop my own self taught scripts, there were no module examples to speak or copy from.

                          See this thread at GoogleGroups, begining with post 4, in which Harald asks the question "... so, are all my .rb scripts really just one huge script?"
                          He was having trouble with the Ruby environment getting corrupted with classes, objects, methods and so forth.. that he didn't want loaded.
                          Read my detailed responces, which explain how things get loaded (both in Sketchup Ruby, and Ruby in general,) and an example of file spanning.

                          I'm not here much anymore.

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                          • T Offline
                            thomthom
                            last edited by 25 Jun 2010, 07:08

                            Unfortunately, the Google examples does not encapsulate their code. But you'll find most plugins here at SCF are. Usually it's the older ones that doesn't.
                            The norm is encapsulate the script in a module which is prefixed with your initials - that goes a long way to prevent namespace collisions. I use TT_, Jim use JF_, Chris use Clf_, etc.

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

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                            • T Offline
                              thomthom
                              last edited by 25 Jun 2010, 07:09

                              @tomot said:

                              To a novice trying to make sense of the current SU Ruby API descriptions and examples, is like shining a light on a subject without a battery in the flashlight. πŸ˜„

                              Yea - πŸ˜„ - that description sounds just about right.

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

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                              • P Offline
                                PurpLev
                                last edited by 30 Jun 2010, 19:45

                                +1 for EntityObserver currently it's pretty much unusable as it crashes SU when it intercepts anything and tries to perform more than a single printout to the console.

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                                • K Offline
                                  kwalkerman
                                  last edited by 26 Jul 2010, 15:42

                                  I definitely add my vote for an onBeforeSave for the Model Observer. Right now, I am doing some stuff and then re-saving...

                                  A few things I came across:

                                  1. re-saving triggers the onSave method in your application, and in any other plugins that have a Model Observer. This can lead to an annoying infinite loop. I fixed this problem by requiring that the times between saves be greater than a certain set time.

                                  2. Once you re-save your model, the model observer immediately calls the onSave method. This means that any code below Sketchup.active_model.save "my model.skp" will not be executed until after the onSave is called and executed again... so any infinite loop prevention should be above the save command.

                                  --
                                  Karen

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                                  • A Offline
                                    Aerilius
                                    last edited by 1 Oct 2011, 01:30

                                    When hiding a layer that contains selected entities, these entities get un-selected. This seems not to trigger onSelectionBulkChange (or even onSelectionCleared).

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                                    • D Offline
                                      Dan Rathbun
                                      last edited by 1 Oct 2011, 08:40

                                      The SelectionObserver still seems to be the most problematic of all the observers.
                                      http://www.thomthom.net/software/sketchup/observers/#note_SelectionObserver

                                      I'm not here much anymore.

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                                      • H Offline
                                        havanasud
                                        last edited by 27 Feb 2012, 13:53

                                        Hi, ViewObserver works on mac?

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                                        • T Offline
                                          thomthom
                                          last edited by 27 Feb 2012, 15:01

                                          @havanasud said:

                                          Hi, ViewObserver works on mac?

                                          Hi

                                          Are you experiencing any problems or unforeseen behavior?

                                          I've not heard of any issues. Think I've used it a couple of times and so far not received any reports of issues.

                                          http://www.thomthom.net/software/sketchup/observers/#ViewObserver (Note - not everything here is tested. So if you find an issue, please let me know so I can update the chart.)

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

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