Struggling with startuseMPgraphic and string argument!
Hi, I'm trying to pass a string argument value to an MPgraphic but it doesn't seem to work: Tried the following: \startuseMPgraphic{name}{lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic \starttext \useMPgraphic{name}{lbl=1} \stoptext The above works as expected! But the following doesn't: \startuseMPgraphic{name}{lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic \starttext \useMPgraphic{name}{lbl=abc} \stoptext It yields: 1 \startuseMPgraphic{name}{lbl} 2 pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; 3 \stopuseMPgraphic 4 5 %\startuseMPgraphic{name}fill fullcircle scaled 200pt withcolor .625yellow ;\stopuseMPgraphic 6 7 \starttext 8 Example: 9 >> \useMPgraphic{name}{lbl=abc} 10 \stoptext 11 <to be read again> a \m_meta_current_variable a-a bc <argument> ... \hbox {\scratchdimen \m_meta_current_variable sp}\ifzeropt \wd \b_meta_v... \secondoftwoarguments #1#2b-#2 \9>>1 #1,2-\meta_prepare_instance_variable {#1} \syst_helpers_do_process_comm... \syst_helpers_do_process_comma_list ...rgument #1, ]\relax \global \advance \... ... l.9 \useMPgraphic{name}{lbl=abc} So it seems that only numbers can be passed not character strings! Why is that? Is there a possibility to achieve this functionality? Regards, Gerard
On 9/16/2020 4:32 PM, Geert Verhaag wrote:
Hi,
I'm trying to pass a string argument value to an MPgraphic but it doesn't seem to work:
Tried the following:
\startuseMPgraphic{name}{lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic
\starttext \useMPgraphic{name}{lbl=1} \stoptext
The above works as expected!
But the following doesn't:
\startuseMPgraphic{name}{lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic
\starttext \useMPgraphic{name}{lbl=abc} \stoptext
It yields:
1 \startuseMPgraphic{name}{lbl} 2 pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; 3 \stopuseMPgraphic 4 5 %\startuseMPgraphic{name}fill fullcircle scaled 200pt withcolor .625yellow ;\stopuseMPgraphic 6 7 \starttext 8 Example: 9 >> \useMPgraphic{name}{lbl=abc} 10 \stoptext 11
<to be read again> a \m_meta_current_variable a-a bc <argument> ... \hbox {\scratchdimen \m_meta_current_variable sp}\ifzeropt \wd \b_meta_v... \secondoftwoarguments #1#2b-#2
\9>>1 #1,2-\meta_prepare_instance_variable {#1} \syst_helpers_do_process_comm... \syst_helpers_do_process_comma_list ...rgument #1, ]\relax \global \advance \... ... l.9 \useMPgraphic{name}{lbl=abc}
So it seems that only numbers can be passed not character strings! Why is that? Is there a possibility to achieve this functionality? magic:
\startuseMPgraphic{name}{s::lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic \starttext \useMPgraphic{name}{lbl=abc} \useMPgraphic{name}{lbl=def} \stoptext ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------
Hi ConTeXt users, That's indeed magic and it works! Hans, thanks for your prompt answer! But I would like to take this a step further, by introducing a macro within the start/stopuseMPgraphic structure like so: \startuseMPgraphic{name}{s::lbl} def mymacro (text lb) = pair a ; a := (3cm,3cm) ;label.top("String: " & str lb,a) ; enddef ; mymacro(\MPvariable{lbl}) ; \stopuseMPgraphic and this works too, but what if I introduce another text argument like: \startuseMPgraphic{name}{s::lbl,s::label} def mymacro (text lb,lbx) = pair a ; a := (3cm,3cm) ;label.top("String: " & str lb & ", " & str lbx,a) ; enddef ; mymacro(\MPvariable{lbl},\MPvariable{label}) ; \stopuseMPgraphic However this doesn't work! It gives the following error: ! Missing argument to mymacro. Isn't that weird? But perhaps it has to do with me not understanding argument passing properly within METAPOST macros! Can someone please explain why this 2 argument example doesn't work? (But maybe this isn't the proper list to ask questions like these. If so, I'm sorry for bothering you!) Regards, Gerard On 16-09-2020 16:32, Geert Verhaag wrote:
Hi,
I'm trying to pass a string argument value to an MPgraphic but it doesn't seem to work:
Tried the following:
\startuseMPgraphic{name}{lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic
\starttext \useMPgraphic{name}{lbl=1} \stoptext
The above works as expected!
But the following doesn't:
\startuseMPgraphic{name}{lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic
\starttext \useMPgraphic{name}{lbl=abc} \stoptext
It yields:
1 \startuseMPgraphic{name}{lbl} 2 pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; 3 \stopuseMPgraphic 4 5 %\startuseMPgraphic{name}fill fullcircle scaled 200pt withcolor .625yellow ;\stopuseMPgraphic 6 7 \starttext 8 Example: 9 >> \useMPgraphic{name}{lbl=abc} 10 \stoptext 11
<to be read again> a \m_meta_current_variable a-a bc <argument> ... \hbox {\scratchdimen \m_meta_current_variable sp}\ifzeropt \wd \b_meta_v... \secondoftwoarguments #1#2b-#2
\9>>1 #1,2-\meta_prepare_instance_variable {#1} \syst_helpers_do_process_comm... \syst_helpers_do_process_comma_list ...rgument #1, ]\relax \global \advance \... ... l.9 \useMPgraphic{name}{lbl=abc}
So it seems that only numbers can be passed not character strings! Why is that? Is there a possibility to achieve this functionality?
Regards, Gerard
___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://context.aanhet.net archive : https://bitbucket.org/phg/context-mirror/commits/ wiki : http://contextgarden.net ___________________________________________________________________________________
-- Sender:G.C.H.M. Verhaag St. Jorisstraat 29 5954 AN Beesel NETHERLANDS Tel.: +31-(0)619502702, E-mail: verhaaggchm@ziggo.nl Ik vertrouw erop dat de persoonlijke gegevens, te vinden in deze mail, uitsluitend voor correspondentie met ondergetekende worden gebruikt en beslist niet voor reclamedoeleinden of welke andere wijze dan ook. Het opnemen van deze gegevens, in welk soort van opslagsysteem dan ook, evenals het doorgeven ervan aan derden, zie ik als een schending van mijn privacy.
On 9/17/2020 9:41 PM, Geert Verhaag wrote:
Hi ConTeXt users,
That's indeed magic and it works! Hans, thanks for your prompt answer!
But I would like to take this a step further, by introducing a macro within the start/stopuseMPgraphic structure like so:
\startuseMPgraphic{name}{s::lbl} def mymacro (text lb) = pair a ; a := (3cm,3cm) ;label.top("String: " & str lb,a) ; enddef ; mymacro(\MPvariable{lbl}) ; \stopuseMPgraphic
and this works too, but what if I introduce another text argument like:
\startuseMPgraphic{name}{s::lbl,s::label} def mymacro (text lb,lbx) = pair a ; a := (3cm,3cm) ;label.top("String: " & str lb & ", " & str lbx,a) ; enddef ; mymacro(\MPvariable{lbl},\MPvariable{label}) ; \stopuseMPgraphic
However this doesn't work! It gives the following error:
! Missing argument to mymacro.
Isn't that weird? But perhaps it has to do with me not understanding argument passing properly within METAPOST macros!
Can someone please explain why this 2 argument example doesn't work?
(But maybe this isn't the proper list to ask questions like these. If so, I'm sorry for bothering you!)
Regards, Gerard
On 16-09-2020 16:32, Geert Verhaag wrote:
Hi,
I'm trying to pass a string argument value to an MPgraphic but it doesn't seem to work:
Tried the following:
\startuseMPgraphic{name}{lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic
\starttext \useMPgraphic{name}{lbl=1} \stoptext
The above works as expected!
But the following doesn't:
\startuseMPgraphic{name}{lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic
\starttext \useMPgraphic{name}{lbl=abc} \stoptext
It yields:
1 \startuseMPgraphic{name}{lbl} 2 pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; 3 \stopuseMPgraphic 4 5 %\startuseMPgraphic{name}fill fullcircle scaled 200pt withcolor .625yellow ;\stopuseMPgraphic 6 7 \starttext 8 Example: 9 >> \useMPgraphic{name}{lbl=abc} 10 \stoptext 11
<to be read again> a \m_meta_current_variable a-a bc <argument> ... \hbox {\scratchdimen \m_meta_current_variable sp}\ifzeropt \wd \b_meta_v... \secondoftwoarguments #1#2b-#2
\9>>1 #1,2-\meta_prepare_instance_variable {#1} \syst_helpers_do_process_comm... \syst_helpers_do_process_comma_list ...rgument #1, ]\relax \global \advance \... ... l.9 \useMPgraphic{name}{lbl=abc}
So it seems that only numbers can be passed not character strings! Why is that? Is there a possibility to achieve this functionality?
\startuseMPgraphic{name}{s::lbl,s::label} def mymacro(expr a, b) = label.top("str:(" & a & "," & b & ")",(3cm,3cm)) ; enddef ; mymacro("\MPvariable{lbl}","\MPvariable{label}") \stopuseMPgraphic
\starttext \useMPgraphic{name}{lbl=abc,label=pqr} \useMPgraphic{name}{lbl=def,label=xyz} \stoptext ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------
On 18-09-2020 09:03, Hans Hagen wrote:
On 9/17/2020 9:41 PM, Geert Verhaag wrote:
Hi ConTeXt users,
That's indeed magic and it works! Hans, thanks for your prompt answer!
But I would like to take this a step further, by introducing a macro within the start/stopuseMPgraphic structure like so:
\startuseMPgraphic{name}{s::lbl} def mymacro (text lb) = pair a ; a := (3cm,3cm) ;label.top("String: " & str lb,a) ; enddef ; mymacro(\MPvariable{lbl}) ; \stopuseMPgraphic
and this works too, but what if I introduce another text argument like:
\startuseMPgraphic{name}{s::lbl,s::label} def mymacro (text lb,lbx) = pair a ; a := (3cm,3cm) ;label.top("String: " & str lb & ", " & str lbx,a) ; enddef ; mymacro(\MPvariable{lbl},\MPvariable{label}) ; \stopuseMPgraphic
However this doesn't work! It gives the following error:
! Missing argument to mymacro.
Isn't that weird? But perhaps it has to do with me not understanding argument passing properly within METAPOST macros!
Can someone please explain why this 2 argument example doesn't work?
(But maybe this isn't the proper list to ask questions like these. If so, I'm sorry for bothering you!)
Regards, Gerard
On 16-09-2020 16:32, Geert Verhaag wrote:
Hi,
I'm trying to pass a string argument value to an MPgraphic but it doesn't seem to work:
Tried the following:
\startuseMPgraphic{name}{lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic
\starttext \useMPgraphic{name}{lbl=1} \stoptext
The above works as expected!
But the following doesn't:
\startuseMPgraphic{name}{lbl} pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; \stopuseMPgraphic
\starttext \useMPgraphic{name}{lbl=abc} \stoptext
It yields:
1 \startuseMPgraphic{name}{lbl} 2 pair a ; a := (3cm,3cm) ;label.top("\MPvariable{lbl}",a) ; 3 \stopuseMPgraphic 4 5 %\startuseMPgraphic{name}fill fullcircle scaled 200pt withcolor .625yellow ;\stopuseMPgraphic 6 7 \starttext 8 Example: 9 >> \useMPgraphic{name}{lbl=abc} 10 \stoptext 11
<to be read again> a \m_meta_current_variable a-a bc <argument> ... \hbox {\scratchdimen \m_meta_current_variable sp}\ifzeropt \wd \b_meta_v... \secondoftwoarguments #1#2b-#2
\9>>1 #1,2-\meta_prepare_instance_variable {#1} \syst_helpers_do_process_comm... \syst_helpers_do_process_comma_list ...rgument #1, ]\relax \global \advance \... ... l.9 \useMPgraphic{name}{lbl=abc}
So it seems that only numbers can be passed not character strings! Why is that? Is there a possibility to achieve this functionality?
\startuseMPgraphic{name}{s::lbl,s::label} def mymacro(expr a, b) = label.top("str:(" & a & "," & b & ")",(3cm,3cm)) ; enddef ; mymacro("\MPvariable{lbl}","\MPvariable{label}") \stopuseMPgraphic
\starttext \useMPgraphic{name}{lbl=abc,label=pqr} \useMPgraphic{name}{lbl=def,label=xyz} \stoptext
----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl -----------------------------------------------------------------
Hi Hans, It really is in the details!!! I was convinced that I did something wrong somewhere, but couldn't figure out what. Thanks very much for your kind help! Regards, Gerard
participants (2)
-
Geert Verhaag -
Hans Hagen