WideStudio Programming Guide

| WideStudio Programming Guide | WideStudio Index Table of contents

> ## How to use the timer

> You can execute the procedure after an interval or in cycles.

> The timer class | Access function
> WSDtimer | WSGIappTimer()

> ### How to execute the procedure after an interval

> At first, prepare the procedure to execute, and register it to the timer as trigger driven.

> The method | Description
> addTriggerProc() | adds procedures as trigger driven
> delTriggerProc() | deletes a added procedures

>     #include "WSDtimer.h"
>     //the procedure which is executed by the timer ( trigger driven )
>     void triggerHandler(unsigned char clock,void* data){
>        //The parameter: data is the third parameter
>        //               of the method: addTriggerProc().

>        //To do:
>     }

>     void event_procedure(WSCbase* obj){
>       //this parameter is passed to the procedure.
>       void*  data = (void*)1234;
>       //add the procedure to the timer (trigger driven)  //after 1000ms
>       long id = WSGIappTimer()->addTriggerProc( triggerHandler,WS1000MS,data );
>       ...
>       //if cancel...
>       WSGIappTimer()->delTriggerProc( id );
>     }

> You can implement the procedure you want in "triggerHandler()", and pass some data by the third parameter:void* of WSDtimer::addTriggerProc(). WSDtimer::addTriggerProc() returns a timer id. You can cancel the timer by the id with WSDtimer::delTriggerProc().
> Notice: After executing the procedure, it will not update the instances automatically, so you have to do it yourself if needed.

>     //a sample of the trigger procedure.
>     void timerHandler(unsigned char clock,void* data){
>        WSCbase* object = (WSCbase*)data;
>        object->setProperty(WSNlabelString,"hello.");
>        object->update(); //update the instance.
>     }

> ### How to execute the procedure after in cycles

> At first, prepare the procedure to execute, and register it to the timer as cycle driven.

> The method | Description
> addTimerProc() | adds procedures as cycle driven.
> delTimerProc() | deletes added procedure.

>     #include "WSDtimer.h"
>     //the procedure which is executed by the timer ( cycle driven )
>     void timerHandler(unsigned char clock,void* data){
>        //clock is a counter of the interval of 250ms
>        //The parameter: data is the third parameter of the method: addTimerProc().

>        //To do:
>     }

>     void event_procedure(WSCbase* obj){
>       //this parameter is passed to the procedure.
>       void*  data = (void*)1234;
>       //add the procedure to the timer (cycle driven)  //500ms interval
>       long id = WSGIappTimer()->addTimerProc( timerHandler,WS500MS,data );
>       ..
>       //if cancel..
>       WSGIappTimer()->delTimerProc( id );
>     }

> You can implement the procedure you want in "timerHandler()", and pass some data by the third parameter:void* of WSDtimer::addTimerProc(). WSDtimer::addTimerProc() returns a timer id. You can cancel the timer by the id with WSDtimer::delTimerProc().
> Notice: After executing the procedure, it will not update the instances automatically, so you have to do it yourself if needed.
> The cycles: WS250MS,WS500MS,WS750,WS1000MS,WS1250MS,... (250ms interval)

>     //a sample of the timer procedure.
>     void timerHandler(unsigned char clock,void* data){
>        WSCbase* object = (WSCbase*)data;
>        object->setProperty(WSNlabelString,"Hello!");
>        object->update(); //update the instance
>     }

Document Release 3.70 for WideStudio ver 3.70, Feb 2004

WideStudio documents index | Table of contents

Copyright(C) T. Hirabayashi, 2000-2004 | Last modified: Feb 25, 2004