Dear Aditya,

Le 7 juin 2020 à 23:19, Aditya Mahajan a écrit :

On Sun, 7 Jun 2020, Fabrice L wrote:

...

Dear List,

I would like to insert a page using (ideally) start/stop instructions. The problem is that this page should be inserted only in a certain mode. Consulting the mailing list, I thought the following code was working, but it’s not ! The code is executed in the mode as expected, but the following instructions ("Some other text... » in the exemple) is not typeset.

Here is a minimal (not working!) example:

% ———————————————————————————————————— \unexpanded\def\StartQuestionsList{ \startmode[ClassRoom] \page[yes] Here are some questions: \blank } \unexpanded\def\StopQuestionsList{ \page[yes] \stopmode } \definestartstop[Questions][ before=\StartQuestionsList, after=\StopQuestionsList ]

\startQuestions Question A…. Question B…. \stopQuestions

Some other text... % ————————————————————————————————————

So to be clear, I would like the result in the « ClassRoom » mode to be: % ———————————————————————————————————— Here are some questions:

Question A…. Question B….

Some other text... % ————————————————————————————————————

Otherwise to be: % ———————————————————————————————————— Some other text... % ————————————————————————————————————

If you only set `ClassRoom` mode at compile time (rather than setting and unsetting it the middle of the document), then you can do:

\definebuffer[Questions]

\startmode[ClassRoom] \define\StopQuestionsList {...}

\definestartstop[Questions][...] \stopmode

Thanks for your answer, I will try that. Fabrice,

Fabrice L schrieb am 08.06.2020 um 21:53:

Thanks to Aditya, I have succeeded, but it was not trivial for me. So, in case somebody someday would need a detailed solution, here is a minimal example, and an explanation.

A buffer « Questions » is defined. If in « ClassRoom » mode, a start/stop « Questions » is also defined. So when ConTeXt encounters the \startQuestions / \stopQuestions, if the « ClassRoom » mode is enabled, the buffer is processed (with some format if needed - framed here for the example), and if the mode « ClassRoom » is disabled, then nothing is process. You can add as many \startQuestions / \stopQuestions you wish.

Let me give a better explanation. The line \definebuffer [Questions] serves two purposes: 1. It create a Questions environment (\startQuestions ... \stopQuestions) 2. I gobbles the content of the environment. When you enable the ClassRoom mode ConTeXt encounters this line \definestartstop [Questions] which redefines the Questions environment which uses now the startstop-mechanism but the previously created environment buffer based environment no longer exists. The reason for this redefinition is to keep the content of the environment in the document although you could have used other methods to achieve the same as \definestartstop. Wolfgang

Le 9 juin 2020 à 03:37, Hans Hagen a écrit :

On 6/8/2020 9:53 PM, Fabrice L wrote:

...

...

Le 7 juin 2020 à 23:19, Aditya Mahajan mailto:adityam@umich.edu> a écrit :

On Sun, 7 Jun 2020, Fabrice L wrote:

...

Dear List,

I would like to insert a page using (ideally) start/stop instructions. The problem is that this page should be inserted only in a certain mode. Consulting the mailing list, I thought the following code was working, but it’s not ! The code is executed in the mode as expected, but the following instructions ("Some other text... » in the exemple) is not typeset.

Here is a minimal (not working!) example:

% ———————————————————————————————————— \unexpanded\def\StartQuestionsList{ \startmode[ClassRoom] \page[yes] Here are some questions: \blank } \unexpanded\def\StopQuestionsList{ \page[yes] \stopmode } \definestartstop[Questions][ before=\StartQuestionsList, after=\StopQuestionsList ]

\startQuestions Question A…. Question B…. \stopQuestions

Some other text... % ———————————————————————————————————— One of the oldest mechanism available ... blocks:

\enablemode[classroom] % comment this

\defineblock[Question]

\doifmode {classroom} { \keepblocks[Question] }

\starttext

Text A

\beginQuestion Question A…. \endQuestion

Text B

\beginQuestion Question B…. \endQuestion

\page

\doifnotmode {classroom} { \useblocks[Question] }

\stoptext

You are right of course... In fact I already use blocks, for another purpose, but I did not think about this solution because I needed a lot of formatting (these blocks should occupy whole page, different background color…), but blocks can adapt to my current need (I have try this morning) using the \setupblock[][before=..,after=…] command. And there is a bonus; I can « collect » these blocks and put them all together at the end of my courses notes, this is perfect.

Dear list,

I have seen the use of blocks mechanism with and without a start/stop combination.

It is not clear to me in which cases it is required to also include a start/stop combination in this mechanism.

\beginquestion

\startquestion

Question A

\stopquestion

\endquestion

\beginanswer

\startanswer

Answer A

\stopanswer

\endanswer

On 6/10/2020 8:42 AM, Jan Willem Flamma wrote: the begin/end are used for marking blobs of content (kind of buffers) that can be mixed in, reused, moved, while start/stop is for structure so, begin/end is independent it is an already old mechanism that was made for educational material where one source had to result in teacher, student, examns, extra, materials but it's there to stay ... Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------