Programming the patterns

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Overview

Code structure

See also

Programming the patterns

Overview

CAUTION: In version 12, the RAD was entirely rebuilt. The method explained in this page is kept for backward compatibility. See New RAD patterns for more details.

The code of pattern elements contains the codes of different RAD generation modes:

the programming mode: simplified, procedural or object-oriented programming
the type of function used: WLanguage, SQL or ODBC commands

Depending on the choices made when generating a RAD window, the proper source code will be included in the window according to the tags inserted into the code of pattern elements.

Code structure

The different tags used are preceded by the % symbol (percentage).

The beginning of a section uses the ifdef keyword and a code used to identify the programming mode or the type of function used by the section. The end of a section is identified by the endif keyword.

Example of skeleton of initialization code of a window:

##########################################
## SECTION 1: Generation of procedural code
##########################################
%ifdef PROC
%ifdef ODBC
##########################################
# ODBC code
##########################################
// Insert the ODBC code used in procedural mode
##########################################
# End of ODBC code
##########################################
%endif

%ifdef SQL
##########################################
# SQL code
##########################################
// Insert the SQL code used in procedural mode
##########################################
# END of SQL code
##########################################
%endif

%ifdef HF
##########################################
# "Standard" procedural code
##########################################
## Special case if the pattern is using a query
%ifdef QUERY
// Insert the code used for a query
## End of the special case if the pattern is using a query
%endif
##########################################
# END of "standard" procedural code
##########################################
%endif
%endif
##########################################
## SECTION 2: Generation of object code
##########################################
%ifdef OBJ
// Insert the object code used
%endif
##########################################
## SECTION 3: Generation of "simple mode" code
##########################################
%ifdef SIMPLE
// Insert the simplified code
%endif

See MDL file: Pattern description and MDL file: Window description for more details