* Struggling with startuseMPgraphic and string argument!
@ 2020-09-16 14:32 Geert Verhaag
2020-09-17 8:01 ` Hans Hagen
2020-09-17 19:41 ` Geert Verhaag
0 siblings, 2 replies; 5+ messages in thread
From: Geert Verhaag @ 2020-09-16 14:32 UTC (permalink / raw)
To: ntg-context
[-- Attachment #1.1: Type: text/plain, Size: 1686 bytes --]
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
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Struggling with startuseMPgraphic and string argument!
2020-09-16 14:32 Struggling with startuseMPgraphic and string argument! Geert Verhaag
@ 2020-09-17 8:01 ` Hans Hagen
2020-09-17 19:41 ` Geert Verhaag
1 sibling, 0 replies; 5+ messages in thread
From: Hans Hagen @ 2020-09-17 8:01 UTC (permalink / raw)
To: mailing list for ConTeXt users, Geert Verhaag
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
-----------------------------------------------------------------
___________________________________________________________________________________
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Struggling with startuseMPgraphic and string argument!
2020-09-16 14:32 Struggling with startuseMPgraphic and string argument! Geert Verhaag
2020-09-17 8:01 ` Hans Hagen
@ 2020-09-17 19:41 ` Geert Verhaag
2020-09-18 7:03 ` Hans Hagen
1 sibling, 1 reply; 5+ messages in thread
From: Geert Verhaag @ 2020-09-17 19:41 UTC (permalink / raw)
To: ntg-context
[-- Attachment #1.1: Type: text/plain, Size: 3982 bytes --]
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
> ___________________________________________________________________________________
--
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Tel.: +31-(0)619502702, E-mail: verhaaggchm@ziggo.nl
Ik vertrouw erop dat de persoonlijke gegevens, te vinden in deze mail,
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___________________________________________________________________________________
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Struggling with startuseMPgraphic and string argument!
2020-09-17 19:41 ` Geert Verhaag
@ 2020-09-18 7:03 ` Hans Hagen
2020-09-18 11:48 ` Geert Verhaag
0 siblings, 1 reply; 5+ messages in thread
From: Hans Hagen @ 2020-09-18 7:03 UTC (permalink / raw)
To: mailing list for ConTeXt users, Geert Verhaag
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
-----------------------------------------------------------------
___________________________________________________________________________________
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
___________________________________________________________________________________
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Struggling with startuseMPgraphic and string argument!
2020-09-18 7:03 ` Hans Hagen
@ 2020-09-18 11:48 ` Geert Verhaag
0 siblings, 0 replies; 5+ messages in thread
From: Geert Verhaag @ 2020-09-18 11:48 UTC (permalink / raw)
To: Hans Hagen, mailing list for ConTeXt users
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
___________________________________________________________________________________
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
___________________________________________________________________________________
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2020-09-16 14:32 Struggling with startuseMPgraphic and string argument! Geert Verhaag
2020-09-17 8:01 ` Hans Hagen
2020-09-17 19:41 ` Geert Verhaag
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2020-09-18 11:48 ` Geert Verhaag
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