After talking directly with Vincent because I was badly thinking it was not
possible to have a configurable class on an other page than the
configuration, I am going to work in that direction.

Thanks,

2016-10-19 10:27 GMT+02:00 Vincent Massol <[email protected]>:

> Hi Guillaume,
>
> > On 19 Oct 2016, at 09:39, Guillaume Delhumeau <
> [email protected]> wrote:
> >
> > Hello.
> >
> > I'm currently working on http://jira.xwiki.org/browse/XWIKI-13075 which
> is
> > on the roadmap for XWiki 8.4.
> >
> > What I propose, is to save the order of the displayed apps in the page
> > "PanelsCode.ApplicationsPanelConfiguration", where the black list is
> > currently saved too.
> >
> > So it won't add an "order" field to the UIX, and the UIX won't be touched
> > when the order changes.
> >
> > In the Panel Application, I must provide this page, because it hold a
> > "ConfigurableClass" XObject and a "DocumentSheetBinding" one.
> >
> > However, I agree that the Panel Application should not decide which
> > applications are in the black list by default nor what is the order of
> the
> > apps. In my opinion, in the Panel app, the configuration should be
> provided
> > empty.
> >
> > Indeed, it's the role of the flavor to provide a different configuration,
> > which also allows us to have different configurations according to the
> > different flavors.
> >
> > Is it OK for you to let the flavor *overwrite* the default
> > "PanelsCode.ApplicationsPanelConfiguration" page, and let in the Panel
> > Application a default "PanelsCode.ApplicationsPanelConfiguration" page
> with
> > the configurable class but no configuration?
> >
> > Is it OK from the EM point of view?
> >
> > When I was in charge of a flavor for XWikiSAS, this mechanism used to
> work
> > but I had to commit http://jira.xwiki.org/browse/XWIKI-11777 to make it
> > work on the packager plugin too.
> >
> > Note: the applications that are installed after and that do not have an
> > "order" in the configuration will be located *after* the applications
> that
> > have an order set in the configuration. We could decide to not show them
> by
> > default afterwards.
>
> All this sounds good to me. One idea though:
> * Don’t provide a PanelsCode.ApplicationsPanelConfiguration page by
> default. And at execution time, if none exist have the Panel.Applications
> panel create one. In general I think that extensions should not provide
> Config pages and that they should be created dynamically with default
> values. The reason is that the user will configure them and if we change
> the default value this generates merge conflicts. So better create the page
> dynamically at first usage if it doesn’t exist.
> * FTR I already do this in the Mail Sender app.
>
> WDYT?
>
> Thanks
> -Vincent
>
> >
> > Thanks,
> >
> > Guillaume
> >
> >
> > 2016-10-07 9:34 GMT+02:00 Vincent Massol <[email protected]>:
> >
> >> Hi Sergiu,
> >>
> >>> On 06 Oct 2016, at 17:56, Sergiu Dumitriu <[email protected]> wrote:
> >>>
> >>> On 10/06/2016 11:36 AM, Vincent Massol wrote:
> >>>> Hi Sergiu,
> >>>>
> >>>>> On 06 Oct 2016, at 17:30, Sergiu Dumitriu <[email protected]> wrote:
> >>>>>
> >>>>> The way I do this for another similar feature, using UIX objects, is
> to
> >>>>> add two new parameters, "enabled" and "order". When displaying the
> >>>>> extensions for a particular point, I request them ordered by the
> >> "order"
> >>>>> parameter, and then manually skip those for which the "enabled"
> >>>>> parameter is set to "false" -- if the parameter is missing, it's
> >>>>> considered enabled by default.
> >>>>>
> >>>>> We can define that the order should have a value between 0 and 100,
> and
> >>>>> each extension can choose it's own relative number, as an expected
> >>>>> percentage, with the actual order depending on which other extensions
> >>>>> are installed and enabled, and their requested order.
> >>>>
> >>>> Yes but IMO this wouldn’t work here for this use case because the
> >> information as to whether a given app is displayed or not should not
> come
> >> from the UIX itself (the app doesn’t know that info and shouldn’t set
> >> this). It should come from the admin or from the flavor for this case at
> >> hand.
> >>>>
> >>>> Also I don’t think that modifying the UIX of an app by the Application
> >> Panel admin UI is a good thing. The storage if this info should go in
> the
> >> App Panel config page instead IMO.
> >>>>
> >>>> WDYT?
> >>>
> >>> True, I was just presenting another approach, which, by the way, also
> >>> has limitations that are making me look for improvements.
> >>>
> >>> I don't agree that the application shouldn't know whether it's suitable
> >>> for being displayed or not. Who knows that an extension is too
> technical
> >>> to be displayed? Certainly not the Panels application,
> >>
> >> I’ve never said the the app panel should know this. This would be
> >> definitely wrong.
> >>
> >>> and flavors can't
> >>> know beforehand all the extensions that may be installed.
> >>
> >> I think there may be 2 different use cases. The one I was addressing
> >> mostly was the **default** list of Apps that are visible in the App
> Panel.
> >>
> >> For this I still believe that the Flavor should have the configuration
> and
> >> that the list of apps visible by **default* don’t depend on the app
> >> themselves but depend on the flavor.
> >>
> >>> I think that
> >>> the application developers are the ones that should decide if their
> >>> application is to be displayed by default or not.
> >>
> >> I think you’re talking about edge cases where some apps really don’t
> want
> >> to be displayed in the Panel. For me these apps should probably not
> even be
> >> apps. An example is an app providing only a wiki macro. This app
> shouldn’t
> >> register as an app at all. And thus it wouldn’t be displayed in the App
> >> Index or App Panel.
> >>
> >> For all other apps, I’m personally fine that they appear in the App
> Panel
> >> for discoverability. Others will contend that some shouldn’t appear. For
> >> example the Scheduler app is an app that I had configured to appear in
> the
> >> App panel for Admins only. Caty didn't agree for XE. But I’m sure she’d
> >> have agreed for a technical flavor where the Scheduler app is key.
> >>
> >>> And these are just initial hints, the admins can then choose to change
> >>> the default and manually hide/show/reorder applications.
> >>>
> >>> Now, for the fact that the parameters are stored *only* in the
> >>> extension, that does indeed cause several problems:
> >>>
> >>> - modifying them may cause extension upgrade conflicts
> >>> - only one global setting, no user or space settings
> >>> - flavors can't override these settings
> >>>
> >>> How about this: we define a way of overriding extension parameters
> using
> >>> custom objects:
> >>>
> >>> XWiki.UIExtensionParameterOverridesClass
> >>> - extensionPointId
> >>> - name
> >>> - parameters
> >>>
> >>> extensionPointId and name must match an UIX, and parameters override
> the
> >>> extension's parameters.
> >>>
> >>> Depending on where the object it placed, it can be valid for:
> >>> - the whole wiki if placed in XWiki.XWikiPreferences
> >>> - a space if placed in <Space>.WebPreferences
> >>> - a certain user if placed in XWiki.<UserProfile>
> >>> - any other page, and have a way of telling the uix manager that we
> want
> >>> to apply the parameter overrides in that page
> >>> - not sure what to do for flavors, is XWiki.XWikiPreferences good, or
> is
> >>> there a flavor-specific configuration page?
> >>>
> >>> How does that sound?
> >>
> >> At first sight, sounds complex to me. I don’t think we need this right
> >> now. For me we only need an App Panel-level configuration that’s taken
> from
> >> the flavor.
> >>
> >> FTR I’m also open to not adding new apps by default to the App Panel
> (Edy
> >> is also ok with this) since for me that’s the role of the App Index.
> Now, I
> >> think the App Index could be more visible (i.e I think we need to make
> it
> >> easier to navigate to various apps without having to open the drawer,
> click
> >> on Apps Index and then find the app). I can think of several ways:
> >> * Add the link to the App Index from “More Applications”. Maybe a “All
> >> Applications” label
> >> * Rework the “More Applicatios” even more so that without clicking on
> “All
> >> Applications” (just by moving the mouse over it) it opens a lightbox
> >> displaying all the apps.
> >> * I’d also like to rework the Goto Page (Ctrl+G) to also add the ability
> >> to navigate to apps more easily. Note that this one is not enough since
> >> it’s harder to discover.
> >>
> >> Now I also agree that a whitelist is interesting (in addition to a
> >> blacklist) and that we should offer the 2 configuration possibilities to
> >> users.
> >>
> >> Thanks
> >> -Vincent
> >>>
> >>>> Thanks
> >>>> -Vincent
> >>>>
> >>>>> As a more advanced feature, in PhenoTips we also have a wizard that
> >>>>> allows enabling/disabling and manually reordering extensions, by
> >>>>> modifying the extension parameters.
> >>>>>
> >>>>> I didn't have time for this yet, but in the future I'd like to add
> >>>>> support for ordering and enable/disable flags in the core UIX module,
> >> so
> >>>>> that extensions are automatically filtered and ordered.
> >>>>>
> >>>>> On 10/05/2016 05:37 AM, Vincent Massol wrote:
> >>>>>> Hi devs,
> >>>>>>
> >>>>>> With the recent introduction of the Applications Index (see
> >> http://extensions.xwiki.org/xwiki/bin/view/Extension/
> >> Application+Index+Application/) we need to agree on a few things.
> >>>>>>
> >>>>>> In the past we had:
> >>>>>> * We wanted all new app that you installed to automatically be
> >> visible in the Applications Panel
> >>>>>> * This is why the Applications Panel config had a blacklist (and not
> >> a white list)
> >>>>>>
> >>>>>> What we’ve done:
> >>>>>> * We add the Applications Index
> >>>>>> * We removed some apps from the Applications Panel. Namely:
> >> Invitation, Panels, Scheduler, User Directory and Tour applications.
> this
> >> was done using hardcoded blacklist xobjects in PanelsCode.
> >> ApplicationsPanelConfiguration.
> >>>>>>
> >>>>>> The need:
> >>>>>> * We need to remove this hack. It’s not normal for the Panels module
> >> to know all the apps that shouldn’t be listed in it!
> >>>>>>
> >>>>>> Proposal:
> >>>>>> * Replace the blacklist configuration of the Applications Panel by a
> >> whitelist one
> >>>>>> * When a new app is installed, list it in the Applications Index but
> >> don’t add it to the Applications Panel
> >>>>>> * If an admin wants to add this new for his users, he’ll need to add
> >> it in the Admin UI for the Applications Panel.
> >>>>>>
> >>>>>> WDYT?
> >>>>>>
> >>>>>> Thanks
> >>>>>> -Vincent
>
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>



-- 
Guillaume Delhumeau ([email protected])
Research & Development Engineer at XWiki SAS
Committer on the XWiki.org project
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