CObjEx - Base class for objects used in script applications

• File: CLASSES.STX, linked to library STX.LIB
• Parent: CObj, Derived classes: XPlot, XGraph, XWave

The class CObjEx is an enhanced base class designed for objects which are used in STx scripts. Objects based on this class are deleted automatically before the script application is finished. By convention a class based on CObjEx implements the following simple instantiation method:

cobjexinst := cobjExClassName constructionArguments

This instantation method can simply be implemented:

[class myclassex cobjex]
exit 1 set '$(cobj 'new $#mac $#argv')'

// start with member functions here
...

Rules for derived classes

If a derived class implementa a construct or destruct member, the base class member must be called.

public_construct:

The default constructor calls the CObj constructor and writes a construct-message to the console window. The base class member takes no arguments and returns always 0 (success). It must be called by derived classes.

public_destruct:

The default constructor stops and deletes the internal timer (&logTimerItem), calls the CObj destructor and writes a destruct-message to the console window. It must be called by derived classes.

Member Functions

Cleanup (static)

cobjex cleanup

Result

none:

Description

Delete all instances of classes derived from CObjEx. This function is called automatically by the script controller (BScript) before the script application exits.

Log

Usage

cobjex_inst log text:

text

the text to write to the script console

Result

none

Description

Write the message cobjex_inst: text to the script console.

ELog

Usage

cobjex_inst elog lev ; res ; text

lev

the number of macro levels to close (1 = return to caller, 2 = exit caller, ...; default=2)

res

the result value to be returned; no default (empty)

text

the text to write to the script console.

Result

none

Description

Write the message cobjex_inst: Error! - text to the script console and exits the specified number of macro levels (exit lev set 'res').

LogExit

Usage

cobjex_inst logexit res ; text:

res

the result to assign after returning.

text

the text to write to the console window

Result

The value of argument res

Description

Writes the message class-instance: text to the script console and exits from 2 macros (= return from caller) with the return value res.

LogTimer

cobjex_inst logtimer cmd ; text

cmd

one of the following:

• ON or BEGIN: start the timer and/or display the elapsed time the console window.
• OFF or END: stop the timer and display the elapsed time in the console window.

text

the text to write to the console window

Return

The elapsed time in seconds.

Description

Start (continue) or stop the internal timer of the object and write the elapsed time and text to the console window.