How to detect mouse and keyboard not used for a time ?

ShumingWang · Post by **ShumingWang** » Thu Dec 13, 2007 2:32 am

Hi,
As title, I want ,if over the setting time ,for example 10 minites ,then app do close app .
Thanks !
Shuming Wang

Post by **Antonio Linares** » Thu Dec 13, 2007 11:14 am

Shuming,

Use a timer that checks a variable that holds the last time when the app was used. Keep such variable updated from your application.

Post by **nageswaragunupudi** » Thu Dec 13, 2007 12:23 pm

This is what I want too. And really very useful.

If in the main Window.Prg's Event Handler, we store the time in seconds whenever an event is handled, we can check thro a timer the difference between last event time and present time.

I am hesitatiing to touch the Window.Prg. If you guide Mr Antonio, we shall do it.

Anyway I have an api to find idle time for the entire system, but that is not what i want. I too want to know how long "my" application is idle.

Post by **nageswaragunupudi** » Thu Dec 13, 2007 12:30 pm

The code I thought of ...
dont know if this works for sure without adding any other complications

Code: Select all

// Window.Prg
STATIC nLastEventTime	:= NIL
//
//
METHOD HandleEvent( nMsg, nWParam, nLParam ) CLASS Window

	nLastEventTime	:= SECONDS()

RETURN  WndHandleEvent( Self, nMsg, nWParam, nLParam )
//
//
FUNCTION ExeIdleTime()
     // midnight correction is to be applied
RETURN iif ( nLastEventTime == NIL, 0, SECONDS()-nLastEventTime)
//

Something like this. Can you offer your guidance Mr Antonio ?

Post by **nageswaragunupudi** » Thu Dec 13, 2007 12:36 pm

Here is my C function to know how long the entire system is idle

Code: Select all

#include "hbapi.h"
#include <windows.h>
#include <winuser.h>

HB_FUNC( SYSTEM_IDLESECS )
{
   LASTINPUTINFO plii;
   DOUBLE dSecs ;

   plii.cbSize = sizeof( plii );
   if ( GetLastInputInfo( &plii ) ) 
       dSecs = ( DOUBLE ) ( GetTickCount() - plii.dwTime ) * 0.001 ;
   else dSecs = 0.0 ;

   hb_retnd(dSecs);
}

Post by **Antonio Linares** » Thu Dec 13, 2007 1:23 pm

NageswaraRao,

The application may receive Windows msgs that don't come from the user

Thats why it may be better to check WM_COMMAND and similar msgs only

Post by **nageswaragunupudi** » Thu Dec 13, 2007 1:30 pm

Can you guide me a little further mr. Antonio ?

Post by **Antonio Linares** » Thu Dec 13, 2007 1:43 pm

Code: Select all

METHOD HandleEvent( nMsg, nWParam, nLParam ) CLASS Window 

   if nMsg == WM_COMMAND
      nLastEventTime := SECONDS()
   endif 

RETURN WndHandleEvent( Self, nMsg, nWParam, nLParam )

Post by **nageswaragunupudi** » Thu Dec 13, 2007 1:48 pm

Mr Antonio

Then do you advise me to add other events like WM_CHAR, WM_KEYDOWN, WM_LBUTTON ...... etc ( events that arise from keyboard and mouse ) to this IF condition ? May be a big list, but may be worth doing it if thats the way

Post by **Antonio Linares** » Thu Dec 13, 2007 1:55 pm

Yes, use the msgs that you want to check