C / C++ / MFC Discussion Boards

Thank you so much......

23-Mar-02 10:56

Thanks..........;P Poke tongue | ;-P

Re: timer question repost.

Christopher Duncan24-Mar-02 14:15

Christopher Duncan

24-Mar-02 14:15

Anonymous wrote:
if (x=10)
{
pause indefinitely //i want the function pause for 1000ms......

if (timer = 1000ms) //function pause for 1000 ms already
continue to do stuff here....
}

I'm not sure I understand entirely. The first comment says you want the function to pause for 1000ms. If that's the case, you can call Sleep(1000);

If, however, you want to know how long the pause was, you can do a fairly cheap & sleazy trick here, depending on the granularity you require:

DWORD dwThen = GetTickCount();
DoSomethingYouWantToTime();
DWORD dwElapsedMilliseconds = GetTickCount() - dwThen;

Be advised that GetTickCount() has a granularity of the system quanta, which is 10ms under NT and 55ms under 9x. If that granularity isn't good enough, then the performance counter example will definatly do the trick for you.

Chistopher Duncan
Author - The Career Programmer: Guerilla Tactics for an Imperfect World (Apress)

Little InterNet Explorer Problem... and reg

FireStorm23-Mar-02 9:32

FireStorm

23-Mar-02 9:32

Hello

, I`ve just signed in and I want to ask a question:
How can I get the progress in a webbrowser control... I mean:
I know how to get it when i push "load" or something like that,but
I want to know how to get the progress when I am browsing
Confused | :confused:

I hope you get it Big Grin | :-D

hihi

How to lcok GridCellCombo

23-Mar-02 9:31

This referes to Chris's Grid Control.

How can I lock the CGridCellCombo box from typed user input. I just want a list box. Only selecting, no typing.

Thank You,

DS

Re: How to lcok GridCellCombo

Matt Newman23-Mar-02 9:32

Matt Newman

23-Mar-02 9:32

I'm not sure but I think it is derived from CComboBox and you would do it the same. If it is there was mention of that not to long ago in this forum.

- Suspicious | :suss:

Matt Newman / Anti-Linux Activist Suspicious | :suss:

-Sonork ID: 100.11179:BestSnowman

†

Re: How to lcok GridCellCombo

thibodaux2-Apr-02 4:45

thibodaux

2-Apr-02 4:45

Change the style of the cell like this :

CGridCellCombo *pCell = (CGridCellCombo*) m_ListZone.GetCell( pItem->iRow + 1, 0 );
pCell->SetStyle(CBS_DROPDOWNLIST);

Hope this help

What to make timer?

23-Mar-02 8:48

Hi, I have a stupid question.

How to make a timer? For example, I want to check the waiting time. If my program has been waiting for 1000 millisecond already, terminate the program.

Thanks

Re: What to make timer?

Mazdak23-Mar-02 9:01

Mazdak

23-Mar-02 9:01

Anonymous wrote:
If my program has been waiting for 1000 millisecond already, terminate the program.

What du you mean by waiting?

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: What to make timer?

23-Mar-02 8:59

For example, due to some reasons I want to "force" my program to pause for 1000 millisecond.......how can i count this 1000ms, and let it go again after 1000ms.

e.g.

if (x=10)
{
pause for 1000ms
continue to do stuff here....
}

thanks!!!!

Re: What to make timer?

Mazdak23-Mar-02 9:10

Mazdak

23-Mar-02 9:10

with Sleep() you can pause the timer.

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: What to make timer?

Mazdak23-Mar-02 9:03

Mazdak

23-Mar-02 9:03

with SetTimer() you can create timer.

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: What to make timer?

23-Mar-02 9:33

I think i describe my question wrongly.

I need a timer to count how long the program has been waiting:

e.g.
if (x=10)
{
pause indefinitely

if (timer = 1000ms) //function pause for 1000 ms already
continue to do stuff here....
}

How can i implement this timer??? Any example!????

Thanks!!!!

Re: What to make timer?

Mazdak23-Mar-02 9:40

Mazdak

23-Mar-02 9:40

oh,yes

For doing this I think you can't use timer.You have to create thread.I don't know how
but you can look into CMutex and other thread class in MSDN for its information.

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: What to make timer?

lilei23-Mar-02 8:59

lilei

23-Mar-02 8:59

If you are just interested in the SDK, use:

SetTimer(hWnd, nID, 1000, NULL);

hWnd will be the handle to where you would like the timer event sent, and nID is the id code for this timer event. The 1000 is the timeout interval between each timer event. You can ignore the last parameter for now, this is for a timerProc callback function.

Then Create a WM_TIMER handler to catch the message, you should check the wParam value to make sure that it is the timer that you are interested in. This becomes important when you create more than one timer.

When you want to get rid of your timer call:

KillTimer(hWnd, nID);

HTML help, Keyword problem !

Hadi Rezaee23-Mar-02 8:05

Hadi Rezaee

23-Mar-02 8:05

Hi there,
I wrote a help by Html Help Workshop,
I maked Index and Content for the Help.
I wanna call the HTML help pages in my program,
I know, i must use HtmlHelp function.
In one of parameters of the function i must enter Keyword !
But i didn't make any Keyword in my HTML help,
How can i make a Keyword in my HTML helps ???
In my HTML help project i saw [MAP] part !
What is it ?

Please help me !

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Array problem

23-Mar-02 7:55

I have a CString array called abc[10000]. This array is initialized in a OnOK() with value "none". However, when I begin a thread, and this thread called another function "testing()".......the array becomes empty.....so i got error message when I access this array in testing().

I've tried to declared this array in stdAfx.h and .cpp, and also its own .h file....but doesn't work too.........

Please help.....

p.s.: I got the similar problem when i use vector array (that's why i choose to declare abc array to abc[10000].)

It works now...thanks

23-Mar-02 8:03

I figure out myself....just a stupid mistake. I should declare the array in StdAfx.h/cpp.

Clear Screen

joeperris23-Mar-02 7:35

joeperris

23-Mar-02 7:35

Hi,

I have an application which I open a dialog box. The dialog box has a button IDC_ANALYSIS with the message handler onOpenanalysis which when pressed opens another dialog box using:

void CEpgActive::OnOpenanalysis()
{

CEpgAnalysis dlgEpgAnalysis(this);
int nRetCode = dlgEpgAnalysis.DoModal();

}

How can I modify this code (if this is the code i should modify!) can I get it so that the 1st dialog is cleared from the screen and only the second dialog is displayed?

Thanks a lot in advance,

Joe

Re: Clear Screen

Nish Nishant23-Mar-02 7:42

Nish Nishant

23-Mar-02 7:42

void CEpgActive::OnOpenanalysis()
{
ShowWindow(SW_HIDE);
CEpgAnalysis dlgEpgAnalysis(this);
int nRetCode = dlgEpgAnalysis.DoModal();
ShowWindow(SW_SHOW);
}

Nish

Oh, I don't know why she's
leaving, or where she's gonna go
I guess she's got her reasons but I just don't wanna know
'Cos for 24 years I've been living next door to Alice
24 years just waitin' for a chance
To tell her how I feel and maybe get a second glance
Now I gotta get used to not living next door to Alice

ActiveX

syedhassan423-Mar-02 5:56

syedhassan4

23-Mar-02 5:56

Please help me . . .

I have a very simple Question. I want to use MSFlexGrid from Windows API, C++. I can not use VC++ and also VC editor.

From where I am find sample on that.

Thanx in advance.

time-consuming thread

RichardWdy23-Mar-02 4:28

RichardWdy

23-Mar-02 4:28

I have a time-consuming thread about mathmatics processing.
I do not want to just wait for its ending.
I created a user-interface thread.

CWinThread *pProcThread = AfxBeginThread(RUNTIME_CLASS(CProcThread));

After I started the thread, I found the thread almost took all CPU's time.
I can't do anything, except closing it.

Can anyone guide me a right way?

Thanks.

Windows2000 SP2, VC++ 6.0 SP5

Re: time-consuming thread

Christopher Duncan23-Mar-02 4:41

Christopher Duncan

23-Mar-02 4:41

It sounds like you've got a tight loop in the theaad somewhere, such as:

while(TRUE)
{
// Nothing happens here to give up the cpu
// spins back to top of loop
}

Take a look at any looping you're doing in the thread, and throw in a Sleep() call before you come back aournd to the top of the loop to give up the cup to the next thread.

Sleep(0) will allow the next thread to get some action without a detrimental effect on your performance in the loop. That will probably suffice if this is your problem. If you sleep for an actual amount of milliseconds, keep in mind that in 9x, your minimum granularity (quanta) is 55 milliseconds (I may be off by a couple of milliseconds on the 9x number, been a while) and under NT it's 10 milliseconds, so even if you call Sleep(1), what you'll get will be these minimum slices depending on the platform.

Chistopher Duncan
Author - The Career Programmer: Guerilla Tactics for an Imperfect World (Apress)

Re: time-consuming thread

RichardWdy23-Mar-02 4:52

RichardWdy

23-Mar-02 4:52

The mathmaics process program is from a dll call.
I can't put any sleep() call into it.
It costs about 2-3 seconds per call(depending on the performance of the
computer). My program has to call 100-400 times.
What shall I do?

Windows98 SE, VC++ 6.0 SP5

Re: time-consuming thread

Joaquín M López Muñoz23-Mar-02 4:55

Joaquín M López Muñoz

23-Mar-02 4:55

If you want to gain some more responsiveness from your UI thread, at the cost of increasing the time taken by the worker thread, lower the priority of the latter by using SetThreadPriority. For best results, create the thread in suspended mode, set its priority and then resume it.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: time-consuming thread

Christopher Duncan23-Mar-02 4:58

Christopher Duncan

23-Mar-02 4:58

Well, it's a little unclear from your previous post exactly what/where the problem is, so more details would be helpful. If what you're saying is that the cpu shoots to 100% utilization for 2-3 seconds each time you make a call to your math library dll (assuming it's not your code but a third party add on), then you're screwed - call their tech support and see if maybe there's something incorrect in how you're calling it. Yeah, I know, not the answer any of us ever want to hear, but if that's the case then you have to talk to the people who wrote that code.

If the dll you're calling is your own code, then of course you can look for tight looping in the dll function that you're calling.

If the problem is not 100% cpu utilization for 2-3 seconds every time you make that dll call, could you please be more specific about what you're experiencing?

Chistopher Duncan
Author - The Career Programmer: Guerilla Tactics for an Imperfect World (Apress)

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