Le 11 janv. 2022 à 17:56, Gavin via ntg-context a écrit :

Thanks Hans! This is great. I made a slight change to add an additional feature. By moving the “mysolution” definition out of \startmode[solution], I can now use mysolution in either mode. I’d use this if I want to give my solution to one of the problems, as an example, on the handout.

-Gavin

I have similar problem for my courses. The solution I use, different than the one offered, is to write in a « special » color the text I want to hide from the students. This permits me to have hidden texts in figures for exemple. Also, I do not calculate space required, this is automated ! Here is MWE : \enablemode[solution] \doifmode{solution}{ \definecolor[solcolor][magenta] } \doifnotmode{solution}{ \definecolor[solcolor][white] } \definedescription[solution] [color=solcolor] \starttext How many roads? \startcolor[solcolor] Professor note.\stopcolor \startsolution 42 roads. \stopsolution How much wood? \startsolution Alotta wood! \stopsolution No more questions. \stoptext So the color used when solutions are hidden are white on white, we can not see the text; but of course, if you change the background, you see the hidden text. So there is another step to the process (I usually do this only once a term); open the file in Acrobat, and find the option to delete hidden text. The text for which the color is the same as the background is really deleted. You can try to select the text in any pdf view/editor, the text is gone ! Fabrice.

% \enablemode[solution]

% Define "mysolution” for use independent of solution mode. \definenarrower[mysolution] [before=\blank\it, after=\blank]

% If in solution mode, define "solution" to use "mysolution" \startmode[solution] \tolerant\protected\def\startsolution[#1]% {\startmysolution} \protected\def\stopsolution {\stopmysolution} \stopmode

% If NOT in solution mode, define "solution" to produce a blank space \startnotmode[solution] \tolerant\protected\def\startsolution[#1]% {\doifelsenothing{#1}{\blank[1in]}{\blank[#1]} \gobbleuntil\stopsolution} \protected\def\stopsolution {} \stopnotmode

\starttext

How many roads? \startsolution 42 roads. \stopsolution

How much wood? \startsolution[1.5in] Alotta wood! \stopsolution

No more questions.

\stoptext

...

On Jan 11, 2022, at 1:13 PM, Hans Hagen wrote:

On 1/11/2022 8:50 PM, Gavin via ntg-context wrote:

...

Hello List, I am making problem sets for a physics class. Solutions use the style defined in the example below, and only appear if the “solution” mode is enabled. I am struggling to get a vertical space for the solution which is the same whether or not the solution is printed. Different problems require different amounts of space, so this should be an argument or key-value. In the example below, the first solution has the desired behavior. The second solution has the syntax I’d like, but it doesn’t make the space without a solution. Any ideas would be welcome! I am still pretty new to ConTeXt, so I struggle mixing things like the plain tex \vbox and ConTeXt \start…\stop concepts. Thanks, Gavin \definemode[solution][yes] % yes to enable solutions, no to disable \definebuffer [solution] % Captures solution in a buffer that isn't used \startmode[solution] % If in solution mode, redefine \startsolution...\stopsolution \definedelimitedtext[solution][ % Solution italic and indented spacebefore=medium, spaceafter=medium, style=\rm\it, leftmargin=standard, % Indents block on the left rightmargin=yes, % Indents block on the right indentnext=no, before=\vbox to 1in\bgroup, after=\egroup, ] \stopmode \starttext How many roads? (The 1-inch space below appears whether or not it contains a solution.) \vbox to 1in{% \startsolution 42 roads. \stopsolution } How much wood? (I would like to define solution so this to behaves like the previous question.) \startsolution[1in] Alotta wood! \stopsolution No more questions. \stoptext a mix between big and low level

% \enablemode[solution]

\startmode[solution] % If in solution mode, redefine \startsolution...\stopsolution

\definenarrower [mysolution] [before=\blank, after=\blank]

\tolerant\protected\def\startsolution[#1]% {\startmysolution \it}

\protected\def\stopsolution {\stopmysolution}

\stopmode

\startnotmode[solution] % If in solution mode, redefine \startsolution...\stopsolution

\tolerant\protected\def\startsolution[#1]% {\doifelsenothing{#1}{\blank[2.5cm]}{\blank[#1]} \gobbleuntil\stopsolution}

\protected\def\stopsolution {}

\stopnotmode

\starttext

How many roads? (The 1-inch space below appears whether or not it contains a solution.)

\startsolution 42 roads. \stopsolution

How much wood? (I would like to define solution so this to behaves like the previous question.)

\startsolution[1in] Alotta wood! \stopsolution

No more questions. \stoptext

much nicer is to use the blocks mechanism (but i need to check if we can do the 2in there)

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 -----------------------------------------------------------------

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Thanks Fabrice and Aditya! With three completely different approaches, I learned three times more than I was expecting. This has been a great help. I will probably use the framedtext method, but I learned something from each. Gavin

On Jan 11, 2022, at 4:44 PM, Aditya Mahajan wrote:

On Tue, 11 Jan 2022, Gavin via ntg-context wrote:

...

Hello List,

I am making problem sets for a physics class. Solutions use the style defined in the example below, and only appear if the “solution” mode is enabled. I am struggling to get a vertical space for the solution which is the same whether or not the solution is printed. Different problems require different amounts of space, so this should be an argument or key-value.

This is how I would do it: piggyback on framedtext. Note that framedtext doesn't break across pages. So, if you have long answers, a different mechanism is needed.

\definemode[solution][no]

\doifmodeelse{solution} {\defineframedtext[solution][empty=no]} {\defineframedtext[solution][empty=yes]}

% Doesn't work. Why? % \expanded{\defineframedtext[solution][empty=\doifmodeelse{solution}{no}{yes}]}

\setupframedtext [solution] [ spacebefore=medium, spaceafter=medium, width=broad, foregroundstyle=\rm\it, loffset=2em, roffset=2em, indentnext=no, ]

\starttext

Sample question. Always show answer.

\startsolution[height=1in, empty=no] Alotta wood! \stopsolution

How much wood?

\startsolution[height=1in] Alotta wood! \stopsolution

You don't need to specify the height:

\startsolution \input ward \stopsolution

No more questions. \stoptext