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Re: Problem displaying CStatic text item

jeron130-Jun-15 10:20

jeron1

30-Jun-15 10:20

Call the create Create() method with initial values and see if anything displays.

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Re: Problem displaying CStatic text item

ForNow30-Jun-15 10:38

ForNow

30-Jun-15 10:38

With the text as the first parm. Ok I'm at work will try tommorow thanks for your help

Re: Problem displaying CStatic text item

jeron130-Jun-15 11:41

jeron1

30-Jun-15 11:41

I have to ask, are there reasons why you can't use the resource editor to add the CStatic control, as opposed to using ptr = new CStatic?

Re: Problem displaying CStatic text item

ForNow30-Jun-15 11:57

ForNow

30-Jun-15 11:57

I am connecting via Tcp/ip
CAsyncSockets to another computer the information I receive will be displaed in the CStatic

Re: Problem displaying CStatic text item

jeron130-Jun-15 12:16

jeron1

30-Jun-15 12:16

But the dialog and display controls in it don't care where the data comes from. Typically (at least for me), when I build a dialog using the resource editor, I place a static control on the dialog, just like I place edit boxes, list boxes, etc. I then create a variable associated with that static control (typically using a wizard), the variable could be a CString type or a control type. If I use a CString type variable, I use UpdateData(), if I use a control type variable I use SetWindowText() and that's about it. Seems like you might be making it unecessarily more complicated.

Re: Problem displaying CStatic text item

ForNow30-Jun-15 12:49

ForNow

30-Jun-15 12:49

Thanks so much i am displaying z/OS (mainframe data on windows)
I am mainframe programmer and its people like yourself that have helped me understand MFC
So can I call Updatedata to initialize the CTEXT I am assuming no that I am not using a control but rather a variable it would be DDX_Text I might also add that I have Richeditctrl in the dialog I am displaying a storage area in the richedit
And the static info are things like what storage area it came from like subpool
Storage protection key I also noticed DDX_Text takes unit I would assume it converts it to CString before the display
Thanks again

One more thing forgot

ForNow30-Jun-15 12:58

ForNow

30-Jun-15 12:58

Sorry
But my question is can I call
UpdateData from anywhere or does it have to be from CDialog::Oninitdialig

Re: One more thing forgot

Richard MacCutchan1-Jul-15 0:22

Richard MacCutchan

1-Jul-15 0:22

You can call it from anywhere. You usually call it first from CDialog::OnInitDialog to set the initial values of the variables. Then you call it at other times, in response to user input to save any new values.

Re: Problem displaying CStatic text item

David Crow30-Jun-15 16:43

David Crow

30-Jun-15 16:43

ForNow wrote:
I have a CStatic ptr says
CStatic *mytext

Why use a pointer? Just add:

CStatic mytext;

to your dialog's header file. Add an entry to your dialog's DoDataExchange() method like:

DDX_Control(pDX, IDC_MYTEXT, mytext);

Then in your dialog's OnInitDialog() method, set the control's text like:

mytext.SetWindowText(_T("Hello World"));

And that's it! No need for pointers, memory allocation, or messy calls to UpdateData().

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Re: Problem displaying CStatic text item

ForNow30-Jun-15 17:06

ForNow

30-Jun-15 17:06

Thanks in a related question if I wanted to change the font of the text I'm guessing I would do that in a the OnCtlColor would I use pWnd->SetFont (of course after I created a font) with CreateFontIndirect or would I use the pDC and do pDC->SelectObject

Thanks

Re: Problem displaying CStatic text item

David Crow1-Jul-15 2:03

David Crow

1-Jul-15 2:03

See the "Bold static controls" section of this article.

Re: Problem displaying CStatic text item

ForNow1-Jul-15 3:36

ForNow

1-Jul-15 3:36

You are really helpful I am going to press my luck and ask the following if the variable was a CString using DDX_Text as per jeron1 would I then look to change The font in OnCtlColor

Thanks

Thanks

Re: Problem displaying CStatic text item

David Crow1-Jul-15 3:41

David Crow

1-Jul-15 3:41

I do not know. In 23 years of using MFC, I've never used a CString as an interface to a static control. Give it a whirl and let us know how it works.

Re: Problem displaying CStatic text item

jeron11-Jul-15 4:04

jeron1

1-Jul-15 4:04

I can't imagine setting or changing the font color being affected by the type of variable (CString or CStatic)associated with the control.

Re: Problem displaying CStatic text item

ForNow1-Jul-15 5:19

ForNow

1-Jul-15 5:19

I was just looking to change the font of a control associated with a CString
David's suggestion would work if I associated the control with a CStatic CWnd object
Thanks

Re: Problem displaying CStatic text item

jeron11-Jul-15 5:59

jeron1

1-Jul-15 5:59

Another way could be like something shown here[^].

Re: Problem displaying CStatic text item

ForNow1-Jul-15 10:21

ForNow

1-Jul-15 10:21

http://www.flounder.com/viewfont.htm[^]

Would I need to implement WM_SETFONT WM_GETFONT as per this article

Re: Problem displaying CStatic text item

jeron11-Jul-15 11:32

jeron1

1-Jul-15 11:32

How often are you changing fonts? Once? if so just call SetFont(...) on the static control object in the OnInitDialog() handler and be done with it (make sure the CFont object is a member of the dialog class). After that you can call SetWindowText() whenever you want. Should be quick enough to try.

Re: Problem displaying CStatic text item

ForNow1-Jul-15 12:19

ForNow

1-Jul-15 12:19

I agree the only things I was adding is the I have to add the message handlers to my CDialog derived for it work per day he article

Thanks will try Tommrow

Re: Problem displaying CStatic text item

ForNow2-Jul-15 13:27

ForNow

2-Jul-15 13:27

jeron1 just wanted to thank you I couldn't get anything going with DDX_Control/CStatic
but the DDX_Text/CString worked out great

Thanks

recv no blocking

mosine29-Jun-15 21:33

mosine

29-Jun-15 21:33

Hi,
I'm developing a server multithread (multiclient) and I have a problem with recv function (c language - SO: windows).
My clients send info to server every 5 seconds and recv function blocks thread until info arrives. I try with ioctlsocket, but the number of byte read always is 0; I try with flag MSG_PEEK, but the data is copied into the buffer, but is not removed from the input queue and so I have many messages.
Is there a way to perform recv function no blocking?
THANKS

Re: recv no blocking

CPallini29-Jun-15 21:54

CPallini

29-Jun-15 21:54

Usually a blocking recv is not a problem at all in a multithreaded application: the receiving thread blocks but the other threads keep runnning and the application is responsive.
On the other hand, as you may find in the documentation[^], you might use non blocking mode on sockets, however, I guess, your application would be more involved.

Re: recv no blocking

mosine29-Jun-15 22:21

mosine

29-Jun-15 22:21

Thanks for reply.
The problem is, if my server must send data to client, it waits 5 seconds because recv function blocks thread.
I try to launch another thread (for each client) for send operation, but cpu works 100%.

Re: recv no blocking

CPallini29-Jun-15 22:35

CPallini

29-Jun-15 22:35

Quote:
The problem is, if my server must send data to client, it waits 5 seconds because recv function blocks thread.

As far as I know, the server's send is not blocked by the client recv.

Quote:
I try to launch another thread (for each client) for send operation, but cpu works 100%.

Waiting on I/O operations should not consume CPU, there's probably a flawn in your code.

Re: recv no blocking

mosine29-Jun-15 22:52

mosine

29-Jun-15 22:52

I post my code:

DWORD  WINAPI cliTh1( LPVOID lpData ){
    struct CLIENT_INFO *pClientInfo;
    char szClientMsg[250];
    char packet[50];
    HANDLE clientTxThread;

    pClientInfo = (struct CLIENT_INFO *)lpData ;
    char *ip = inet_ntoa(pClientInfo->clientAddr.sin_addr);
    printf("SOCKET:%d  - IP:%s  - THREAD_ID:%ld\n", pClientInfo->hClientSocket, ip   
                                                   ,GetCurrentThreadId());
    Q->pClient = pClientInfo;
    pClientInfo->primaConn = 0;
    pClientInfo->indirizzo = 0;
    pClientInfo->p = getDisconnect;
    while ( 1 ){
        if(j>=MAXELEMENTS){j=0;};
        if(WSAGetLastError()){
            if(pClientInfo->primaConn == 1){
                disconnectBuffer[pClientInfo->indirizzo] = 1;
                pClientInfo->primaConn=0;
            }
            if(disconnectBuffer[pClientInfo->indirizzo] == 1){
                creaPackDisc(packet, pClientInfo->indirizzo);
                strcpy(bufferRx[j].packet, packet);
                Enqueue(Q,  packet);
                j++;
            }else{
                closesocket(pClientInfo->hClientSocket);
                ExitThread(pClientInfo->txThId);
                ExitThread(GetCurrentThreadId());
            }
            Sleep(1000);
        }else{
            if((pClientInfo->primaConn == 0) && (pClientInfo->indirizzo != 0)){
                pClientInfo->connessione = setConnect(GetCurrentThreadId(), pClientInfo->indirizzo, ip);
                if(pClientInfo->connessione == 1){
                    pClientInfo->primaConn = 1;
                }
                //THREAD TX for each client
                clientTxThread = CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)txThread, 
                                              pClientInfo,0,&pClientInfo->txThId);
                if ( clientTxThread == NULL ){
                    printf("Unable to create client thread");
                } else {
                    CloseHandle( clientTxThread ) ;
                }
            }
            if(recv( pClientInfo -> hClientSocket, szClientMsg, sizeof( szClientMsg ), 0  ) > 0){
                strcpy(bufferRx[j].packet, szClientMsg);
                memset(&szClientMsg[0], 0, sizeof(szClientMsg));
                pClientInfo->indirizzo = calcolaHighLow(bufferRx[j].packet[1], bufferRx[j].packet[2],  
                                                       bufferRx[j].packet[3], bufferRx[j].packet[4]);
                Enqueue(Q,  bufferRx[j].packet);
                j++;
                strncpy(message, "ACK\n\r",5);
                send(pClientInfo -> hClientSocket , message , 5 , 0);
            }
        }
    }
    return(TRUE);
}

CPU works 100% with this solution.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.