Re: Linkage attributes

Krzysiek pisze:
> Hello
> 
> I have a problem. I'm trying to add attribute to element but I haven't 
> still done it. So I decided to write a program to testing but it doesn't

> work too. What I do wrong ? Why function mdlLinkage_appendToElement 
> cannot add attribute to element ?
> 
> test.mc:
> 
> #include <mdl.h>
> #include <mselems.h>
> #include <stdio.h>
> #include <string.h>
> 
> #include "test.h"
> 
> #include <mselemen.fdf>
> #include <mscurrtr.fdf>
> #include <mssystem.fdf>
> #include <mslinkge.fdf>
> #include <msdialog.fdf>
> 
> #define TESTID             999
> 
> #define ID_GRAF            1
> 
> int main(int argc, char *argv[])
> {
>     DPoint3d p[2] = {{0.0,0.0,0.0},
>                      {50.0,50.0,0.0}};
>     MSElement el;
>     LinkageHeader header;
>     Attr att;
>     AttrRecv copy;
>     UInt fPos;
>     char napis[200];
>     
> 
>     memset(&header, 0, sizeof(LinkageHeader));
>     header.info    =0;
>     header.remote    =0;
>     header.modified    =0;
>     header.user = 1;
>     header.primaryID = TESTID;
>     att.id = 500;
>     
>     mdlCurrTrans_begin ();
>     mdlCurrTrans_masterUnitsIdentity(TRUE);
> 
>     if (mdlLine_create(&el, NULL, p) != SUCCESS)
>     {
>         printf("nie uda³o siê utworzyæ elementu!\n");
>         return 1;
>     }
>     mdlCurrTrans_end ();
> 
>     mdlElement_display(&el, NORMALDRAW);
>     
> 
>     if(mdlLinkage_appendToElement(&el, &header, &att, ID_GRAF, NULL) != 
> SUCCESS)
>     {
>         mdlDialog_openInfoBox("Nie podpiêto atrubutu");
>         mdlSystem_unloadMdlProgram("userlink");
>         return  1;
>     }
>     else
>         mdlDialog_openInfoBox("Podpieto atrybut");
>     
>     //mdlElement_rewrite(&el, NULL, fPos);
>     fPos = mdlElement_add(&el);
>     if (fPos<= 0L)
>     {
>         printf("nie uda³o siê dodaæ elementu do pliku!\n");
>         mdlSystem_unloadMdlProgram("userlink");
>         return 1;
>     }
>     
>     if (mdlLinkage_extractFromElement( &copy, &el, TESTID, ID_GRAF,NULL,

> NULL, NULL) != SUCCESS)
>     {
>         mdlDialog_openInfoBox("Nie zczytano atrybutu");
>         mdlSystem_unloadMdlProgram("userlink");
>         return  1;
>     }
>     else
>     {   
>         sprintf(napis, "Atrybut ma warto¶æ = %d", copy.id);
>         mdlDialog_openInfoBox(napis);
>     }
>     mdlSystem_unloadMdlProgram("userlink");
>     return  0;    /*meaningless int value returned by main */
> }
> 
> 
> test.h:
> 
> #include <mselems.h>
> 
> typedef struct attr {
>     int id;
> } Attr;
> 
> typedef struct attr_Recv {
>     LinkageHeader header;
>     int id;
> } AttrRecv;
> 
> test.mt
> 
> #include "test.h"
> 
> createDataDef (attr, TEST);
> 
> 
> 
> I hope you can help me.
> Thanks
> Krzysztof

When I got on top lines:

RscFileHandle   rscFH;

mdlResource_openFile (&rscFH, NULL, 0);

I can append attribute but I still can't extract attribute from element. 
I get info that the stored value is equal 0.

What could by wrong ?

Krzysztof