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From: Jeong Dal <haksan@me.com>
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Subject: add more blank space when using \starteffect[hidden]
Date: Sat, 13 Mar 2021 06:08:56 +0900
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Hi,

Sometimes, I need to hide the solution of a problem.
So I use \doifmode{} and \starteffect[hidden] as in the following sample =
file.
Since I want to set more blank space if it is hidden, I add \blank[5cm] =
when it is in the \enablemode[hideSolution].
It works well except the figures and bars are not hidden. Only texts, =
even  in the mp part, are hidden.
It is OK for me.

However, it would be much better to set the height of blank space =
depends on the height of hidden texts.
Is there a way to set the variable height  using =E2=80=9Coverlay=E2=80=9D=
 stuff instead of \blank[5cm]?

Thank for reading.

Best regards,

Dalyoung


\startbuffer[circles]
draw fullcircle scaled 1cm;
draw fullcircle scaled 1cm shifted (2cm,0);
dotlabel.top(=E2=80=9CO=E2=80=9D,origin);
\stopbuffer

\def\StartHide{\doifmode{hideSolution}{\starteffect[hidden]}}  =20
\def\StopHide{\doifmode{hideSolution}{\stopeffect\blank[5cm]}}  =20

%\enablemode[hideSolution]

\starttext
\framed[]{This is what I want:}
\framedtext[]{
  \StartHide
  \samplefile{knuth}
=20
 Overbar is not \overbar{hidden}.
  {\processMPbuffer[circles]}
 =20
  \StopHide
}
\stoptext


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<html><body style=3D"word-wrap: break-word; -webkit-nbsp-mode: space; =
-webkit-line-break: after-white-space;" class=3D"">Hi,<div class=3D""><br =
class=3D""></div><div class=3D"">Sometimes, I need to hide the solution =
of a problem.</div><div class=3D"">So I use \doifmode{} and =
\starteffect[hidden] as in the following sample file.</div><div =
class=3D"">Since I want to set more blank space if it is hidden, I add =
\blank[5cm] when it is in the \enablemode[hideSolution].</div><div =
class=3D"">It works well except the figures and bars are not hidden. =
Only texts, even &nbsp;in the mp part, are hidden.</div><div class=3D"">It=
 is OK for me.</div><div class=3D""><br class=3D""></div><div =
class=3D"">However, it would be much better to set the height of blank =
space depends on the height of hidden texts.</div><div class=3D"">Is =
there a way to set the variable height &nbsp;using =E2=80=9Coverlay=E2=80=9D=
 stuff instead of \blank[5cm]?</div><div class=3D""><br =
class=3D""></div><div class=3D"">Thank for reading.</div><div =
class=3D""><br class=3D""></div><div class=3D"">Best regards,</div><div =
class=3D""><br class=3D""></div><div class=3D"">Dalyoung</div><div =
class=3D""><br class=3D""></div><div class=3D""><div style=3D"color: =
rgb(0, 0, 0); background-color: rgb(207, 207, 207); font-family: Menlo, =
Monaco, &quot;Courier New&quot;, monospace; font-size: 16px; =
line-height: 24px; white-space: pre;" class=3D""><br class=3D""><div =
class=3D""><span style=3D"color: #007f00;font-weight: bold;" =
class=3D"">\startbuffer</span><span style=3D"color: #00007f;" =
class=3D"">[</span>circles<span style=3D"color: #00007f;" =
class=3D"">]</span></div><div class=3D"">draw fullcircle scaled =
1cm;</div><div class=3D"">draw fullcircle scaled 1cm shifted <span =
style=3D"color: #00007f;" class=3D"">(</span>2cm,0<span style=3D"color: =
#00007f;" class=3D"">)</span>;</div><div =
class=3D"">dotlabel.top(=E2=80=9CO=E2=80=9D,origin);</div><div =
class=3D""><span style=3D"color: #007f00;font-weight: bold;" =
class=3D"">\stopbuffer</span></div><br class=3D""><div class=3D""><span =
style=3D"color: #00007f;font-weight: bold;" class=3D"">\def</span><span =
style=3D"color: #007f00;" class=3D"">\StartHide</span><span =
style=3D"color: #7f0000;" class=3D"">{</span><span style=3D"color: =
#007f7f;font-weight: bold;" class=3D"">\doifmode</span><span =
style=3D"color: #7f0000;" class=3D"">{</span>hideSolution<span =
style=3D"color: #7f0000;" class=3D"">}{</span><span style=3D"color: =
#007f00;font-weight: bold;" class=3D"">\starteffect</span><span =
style=3D"color: #00007f;" class=3D"">[</span>hidden<span style=3D"color: =
#00007f;" class=3D"">]</span><span style=3D"color: #7f0000;" =
class=3D"">}}</span>   </div><div class=3D""><span style=3D"color: =
#00007f;font-weight: bold;" class=3D"">\def</span><span style=3D"color: =
#007f00;" class=3D"">\StopHide</span><span style=3D"color: #7f0000;" =
class=3D"">{</span><span style=3D"color: #007f7f;font-weight: bold;" =
class=3D"">\doifmode</span><span style=3D"color: #7f0000;" =
class=3D"">{</span>hideSolution<span style=3D"color: #7f0000;" =
class=3D"">}{</span><span style=3D"color: #007f00;font-weight: bold;" =
class=3D"">\stopeffect\blank</span><span style=3D"color: #00007f;" =
class=3D"">[</span>5cm<span style=3D"color: #00007f;" =
class=3D"">]</span><span style=3D"color: #7f0000;" class=3D"">}}</span>  =
 </div><br class=3D""><div class=3D""><span style=3D"color: =
#007f7f;font-weight: bold;" class=3D"">%\enablemode</span><span =
style=3D"color: #00007f;" class=3D"">[</span>hideSolution<span =
style=3D"color: #00007f;" class=3D"">]</span></div><br class=3D""><div =
class=3D""><span style=3D"color: #007f7f;font-weight: bold;" =
class=3D"">\starttext</span></div><div class=3D""><span style=3D"color: =
#007f00;font-weight: bold;" class=3D"">\framed</span><span style=3D"color:=
 #00007f;" class=3D"">[]</span><span style=3D"color: #7f0000;" =
class=3D"">{</span>This is what I want:<span style=3D"color: #7f0000;" =
class=3D"">}</span></div><div class=3D""><span style=3D"color: =
#007f00;font-weight: bold;" class=3D"">\framedtext</span><span =
style=3D"color: #00007f;" class=3D"">[]</span><span style=3D"color: =
#7f0000;" class=3D"">{</span></div><div class=3D"">  <span style=3D"color:=
 #007f00;" class=3D"">\StartHide</span></div><div class=3D"">  <span =
style=3D"color: #007f00;font-weight: bold;" =
class=3D"">\samplefile</span><span style=3D"color: #7f0000;" =
class=3D"">{</span>knuth<span style=3D"color: #7f0000;" =
class=3D"">}</span></div><div class=3D"">&nbsp;</div><div class=3D""> =
Overbar is not \overbar{hidden}.</div><div class=3D"">  <span =
style=3D"color: #7f0000;" class=3D"">{</span><span style=3D"color: =
#007f00;font-weight: bold;" class=3D"">\processMPbuffer</span><span =
style=3D"color: #00007f;" class=3D"">[</span>circles<span style=3D"color: =
#00007f;" class=3D"">]</span><span style=3D"color: #7f0000;" =
class=3D"">}</span></div><div class=3D"">  </div><div class=3D"">  <span =
style=3D"color: #007f00;" class=3D"">\StopHide</span></div><div =
class=3D""><span style=3D"color: #7f0000;" class=3D"">}</span></div><div =
class=3D""><span style=3D"color: #007f7f;font-weight: bold;" =
class=3D"">\stoptext</span></div><br class=3D""></div></div></body></html>=

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