On Mon, Jul 29, 2019 at 12:00:07PM -0400, pharo-users-request@lists.pharo.org wrote:

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Today's Topics:

1. Warning Newbie Question: Bootstrap Navbar example works my copy and paste fails? (ian) 2. Re: Warning Newbie Question: Bootstrap Navbar example works my copy and paste fails? (jtuchel@objektfabrik.de) 3. Re: Warning Newbie Question: Bootstrap Navbar example works my copy and paste fails? (Esteban Maringolo)

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Message: 1 Date: Sun, 28 Jul 2019 21:02:01 -0400 From: ian <ian@icjohnson.com> To: pharo-users@lists.pharo.org Subject: [Pharo-users] Warning Newbie Question: Bootstrap Navbar example works my copy and paste fails? Message-ID: <20190729010201.GA11499@desktop.icjohnson.com> Content-Type: text/plain; charset=us-ascii

Hi All,

Hopefully this is an easy one?

I have been going through the MOOC exercises and have come across something I can't seem to figure out.

In the example the code reads:

---- renderExampleOn: html

| bar id| id := 'navbarSupportedContent'. bar := html navigationBar. bar beLight; expandLarge. bar background beLight. bar with: [ html navigationBarBrand: 'Navbar'. ]

----

Mine reads exactly the same but errors in the browser with:

----

Seaside Walkback MessageNotUnderstood: WAHtmlCanvas>>navigationBar

Debug Proceed Full Stack Possible Causes

you sent a message this type of object doesn't understand

Stack Trace

thisContext WAHtmlCanvas(Object)>>doesNotUnderstand: #navigationBar self a WAHtmlCanvas

thisContext VIHeaderComponent>>renderContentOn: self a VIHeaderComponent

thisContext WARenderVisitor>>visitPainter: self a WARenderVisitor

thisContext WARenderVisitor(WAPainterVisitor)>>visitPresenter: self a WARenderVisitor

thisContext WARenderVisitor(WAPainterVisitor)>>visitComponent: self a WARenderVisitor

----

When using Finder to locate the selector, navigationBar, I notice that it is a selector of SBSHtmlCanvas.

So my question is: How to I set up my rendering class in seaside properly? Currently, as per all I can find I am properly using WAComponent as application super class.

I don't see anything in the seaside book regarding bootstrap and I am fallowing the MOOC section on bootstrap almost to a tee. Accepting the fact that the library is now SBSDeploymentLibrary rather than TBSDeploymentLibrary.

Any help would be greatly appreciated.

Kindly,

Ian

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Message: 3 Date: Mon, 29 Jul 2019 09:40:31 -0300 From: Esteban Maringolo <emaringolo@gmail.com> To: Any question about pharo is welcome <pharo-users@lists.pharo.org> Subject: Re: [Pharo-users] Warning Newbie Question: Bootstrap Navbar example works my copy and paste fails? Message-ID: <CAJMgPC+TGk+q-8QU9S7im06ARgkKT-3eC51hCNMRuB=8vFGG+A@mail.gmail.com> Content-Type: text/plain; charset="UTF-8"

You're using the Bootstrap 4 library and methods.

I don't know about the one referenced in the MOOC, but there are several differences between Torsten's Bootstrap 3 (TBS prefixed classes) and Bootstrap 4 (SBS prefix), in particular because Bootstrap 4 library wrapper uses a subclass of WAHtmlCanvas where all the methods are implemented.

See if your component implements #rendererClass it should return SBSHtmlCanvas as its renderer class instead of the default, inherited, WAHtmlCanvas.

Regards,

Esteban A. Maringolo

Thanks Esteban, In the playground: ---- | header | header := VIHeaderComponent new. header rendererClass. ---- Returns: WAHtmlCanvas and not SBSHtmlCanvas. ---- Thus the fix was to override rendererClass and return the correct rendering class. Nowhere in the documentation is this evident (although if I was ST proficient I would have been able to figure that out? Thanks Muchly Esteban!!