WideStudio Programming Guide

| WideStudio Programming Guide | WideStudio Index Table of contents

> ## How to select the key events on the input field

> You can select or reject/convert the key events on the input field with the event procedure by the WSEV_KEY_HOOK trigger.

>     //A WSEV_KEY_HOOK sample procedure.
>     //Set the input field with the WSEV_KEY_HOOK trigger.
>     #include "WSDkeyboard.h"
>     ...

>     void hookop(WSCbase* object){
>       //get the pressed key code.
>       long key = WSGIappKeyboard()->getKey();
>       //Choose the key which is a numerical code.
>       if ( (key >= WSK_0    && key <= WSK_9   ) ||
>            (key >= WSK_KP_0 && key <= WSK_KP_9) ||
>             key == WSK_plus      || key == WSK_minus  ||
>             key == WSK_BackSpace || key == WSK_Delete || key == WSK_Insert ||
>             key == WSK_space     || key == WSK_Up     || key == WSK_Down   ||
>             key == WSK_Left      || key == WSK_Right  || key == WSK_Return ){
>         //dispatches..
>         return;
>       }
>       //Reject the other.
>       WSGIappKeyboard()->setKey(0);
>     }

> This sample of the input field shows how to choose the key event. WSGIappKeyboard()->setKey(0) reject the key event which you do not need.

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