While Looping problem - C / C++ / MFC Discussion Boards

Re: how to display unicode without unicode built?

Peter, Chan10-Jul-07 21:21

Peter, Chan

10-Jul-07 21:21

Thanks.

Re: how to display unicode without unicode built?

Stephen Hewitt10-Jul-07 21:30

Stephen Hewitt

10-Jul-07 21:30

This is not the case. Take the following example ANSI application:

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
	MessageBoxW(NULL, L"This string is UNICODE!", L"Unicode", MB_OK);

	return 0;
}

In this case all the UNICODE define (and related ones) does is map the macro MessageBox to either the MessageBoxA function (non-UNICODE) or the MessageBoxW function (UNICODE). By using MessageBoxW we get the UNICODE version regardless the the setting.

Steve

Re: how to display unicode without unicode built?

Rajesh R Subramanian10-Jul-07 22:34

Rajesh R Subramanian

10-Jul-07 22:34

Thanks for pointing it out, I think I've been avoiding ANSI builds for all good reasons. I've never tried what you've suggested.

Nobody can give you wiser advice than yourself. - Cicero

Re: how to display unicode without unicode built?

khan++10-Jul-07 21:29

khan++

10-Jul-07 21:29

I think you could use code similar to the following:

::SetWindowTextW(m_Static.m_hWnd, L"Unicode text here");

Where m_Static is your static control.

this is this.

Re: how to display unicode without unicode built?

Peter, Chan10-Jul-07 21:35

Peter, Chan

10-Jul-07 21:35

Yeah, I have tried that. But what it displayed only "????????????"

So I think the only way is building it in unicode

Re: how to display unicode without unicode built?

Stephen Hewitt10-Jul-07 21:47

Stephen Hewitt

10-Jul-07 21:47

It worked perfectly when I tried it just then.
Also, you may want to investigate the CCM_SETUNICODEFORMAT message.

Steve

Re: how to display unicode without unicode built?

KarstenK10-Jul-07 21:44

KarstenK

10-Jul-07 21:44

Convert the Unicode text to ansi text.

If this is not possible than you need a Unicode application. OMG | :OMG:

Greetings from Germany

While Looping problem

Anu_Bala10-Jul-07 20:48

Anu_Bala

10-Jul-07 20:48

Hi,in my coding i have this FOR lop in OnDraw(),i have to calculate Average Value for like 2mins.

THis is my function..I use While Loop..But the control it does not exit form the loop.The coding get hanged at one time.I dont know why it occurs.When debugging it continously running(i think the fucntion call is in OnDraw())..
The value that i have to calculate is not one time value.Its continously changing value i have to calculate the average for first 2 mins and 1 hour like that.Thats why i have that function in OnDraw().I dont know where the mistake is.Pls help me out
/////
for(int i=0;i<4;i++)
{
DrawAvgValues(pScreenDC,i,iGroupIndex[i]);
}
/////
void CHourAvgView::DrawAvgValues(CDC *pMemDc,int pos, int INDEX)
{
float TotalPV =0.00;
float AvgPV = 0.00;
float PV;
int nMinute = (CTime::GetCurrentTime ()).GetMinute();
int nHour = (CTime::GetCurrentTime ()).GetHour();
int Time = nMinute+ (nHour*60);
int TtlTime = Time+2;
SLiveTagData oLiveTagData;
CTagBase *pTageBase;
while(Time<=TtlTime)
{
int nowMin = (CTime::GetCurrentTime ()).GetMinute();
int nowHour = (CTime::GetCurrentTime ()).GetHour();
int nowTime = nowMin+(nowHour*60);
if(nowTime ==Time)
{
POSITION position= goLiveList.FindIndex(INDEX);
if(position)
{
pTageBase = (CTagBase*)goLiveList.GetAt(position);
switch(pTageBase->GetTagType())
{
case CONTROLLER:
{

PV = oLiveTagData.PV;
TotalPV = TotalPV+PV;
break;
}
case INDICATOR:
{
PV = oLiveTagData.PV;
TotalPV = TotalPV+PV;
break;
}
default:
break;
}
}
Time=Time+1;
}

}
AvgPV = TotalPV/2;
int spos = ESimSetDM.dmPelsWidth/10;
x = (spos) * (pos +1);
y= (ESimSetDM.dmPelsHeight/2)+200;
char Avg[10];
sprintf(Avg, "%06.2f", AvgPV );
pScreenDC->SetTextColor(RGB(255,255,255));
pScreenDC->TextOut(x,y,Avg);
}

Anu

Re: While Looping problem

Cedric Moonen10-Jul-07 21:02

Cedric Moonen

10-Jul-07 21:02

Why don't you use a timer instead ? It seems that you need to recalculate everything every minute. So, why do you make a busy loop ? First it will block in the function (preventing any window message to be processed, so your GUI will freeze) and second, you will consume CPU for nothing.
It would be much easier to start a timer (with a resolution of 1 minute) and to do your processing each time the timer fires.

Cédric Moonen
Software developer

Charting control [v1.2]

Re: While Looping problem

David Crow11-Jul-07 3:23

David Crow

11-Jul-07 3:23

Anu_Bala wrote:
I dont know why it occurs.

Because Time is never greater than TtlTime.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Waiting...

Abhijeet Pathak10-Jul-07 20:32

Abhijeet Pathak

10-Jul-07 20:32

Hi,
Sleep() function makes application sleep for specified time, but it blocks
the thread from processing anything.
How can i make application sleep for some time but still process the
messages? (e.g. equivalent to DoEvents in Visual Basic 6)

-----
Don't look back... See your stomach...

Re: Waiting...

baerten10-Jul-07 21:13

baerten

10-Jul-07 21:13

The sleep() lets sleep the thread where it's inside.
If you let sleep the WinThread, so all the windows will sleep too.

You need to use workerthreads, there in you can let sleep the threads as long as you want and
the windows will not be affected ...

Good luck

Re: Waiting...

Hans Dietrich11-Jul-07 3:37

Hans Dietrich

11-Jul-07 3:37

This is for UI thread:

void Delay(DWORD dwMsecs, BOOL bBlocking)
{
    static BOOL bInDelay = FALSE;

    if (bInDelay)
        return;
    bInDelay = TRUE;

    DWORD dwStrtmsecs, dwCurmsecs;
    MSG msg;

    dwStrtmsecs = dwCurmsecs = ::GetCurrentTime();

    do 
    {
        if (!bBlocking)
        {
            if (::PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) 
            {
                if (msg.message == WM_QUIT)
                {
                    ::PostMessage(NULL, WM_QUIT, 0, 0L);
                    break;
                }
                else
                {
                    ::TranslateMessage(&msg);
                    ::DispatchMessage(&msg);
                }
            }
        }

        dwCurmsecs = ::GetCurrentTime();

        // check for timer overflow condition
        if (dwCurmsecs < dwStrtmsecs)
            dwStrtmsecs = dwCurmsecs;

    } while ((dwCurmsecs  < (dwMsecs + dwStrtmsecs)));

    bInDelay = FALSE;
}

Best wishes,
Hans

[CodeProject Forum Guidelines] [How To Ask A Question] [My Articles]

Re: Waiting...

Abhijeet Pathak11-Jul-07 5:46

Abhijeet Pathak

11-Jul-07 5:46

Wow, thanks a lot... there's lot to learn out there, i guess... Smile | :)

worker and UI thread? [modified]

murali_utr10-Jul-07 20:17

murali_utr

10-Jul-07 20:17

How to communicate UI thread from worker thread?

Thanks in advance.

-- modified at 2:32 Wednesday 11th July, 2007

Have A Nice Day!
Murali.M

Re: worker and UI thread?

Cedric Moonen10-Jul-07 21:10

Cedric Moonen

10-Jul-07 21:10

In general, the way it is done is simply pass a pointer to a class or structure to your thread function (you can pass an argument to this function when you start the thread). Then, you can simply change variables of this class/structure. But beware that they need to be protected with critical sections (to avoid that both threads access the same variable at the same time).

Cédric Moonen
Software developer

Charting control [v1.2]

Re: worker and UI thread?

eraccn10-Jul-07 22:20

eraccn

10-Jul-07 22:20

I think in many ways we don't specially cosider UI thread and worker thread in communication,we just use thread-communicate,you can use any mechanism of thread-communicate to transfer message from one thread to another,such as postmessage,sendmessage and so on.Of course what I referred above are all in one process.

Re: worker and UI thread?

Cedric Moonen10-Jul-07 22:30

Cedric Moonen

10-Jul-07 22:30

To be able to use PostMessage and SendMessage, you need to have a window that will receive the messages. If you have a worker thread, generally you don't have a window, so this is not really an option.

Cédric Moonen
Software developer

Charting control [v1.2]

Re: worker and UI thread?

eraccn10-Jul-07 22:37

eraccn

10-Jul-07 22:37

The UI thread of course has a window procedure which the worker thread can post or send message to.

Re: worker and UI thread?

Cedric Moonen10-Jul-07 22:43

Cedric Moonen

10-Jul-07 22:43

Of course. But it is not possible the other way around.

Cédric Moonen
Software developer

Charting control [v1.2]

Re: worker and UI thread?

SandipG 11-Jul-07 1:28

SandipG

11-Jul-07 1:28

You can use events for symchronization you can also use Other synchronization objects like Critcal section.
You cant pass messages to worker thread.
If you wanna communicate from worker thread ->UI thread you can pass messages.
i Hope it is useful.

Thanks,
SandipG.

Re: worker and UI thread?

Mark Salsbery11-Jul-07 10:13

Mark Salsbery

11-Jul-07 10:13