I don't understand the value of a token strtok_s - C / C++ / MFC Discussion Boards

Re: Using Timer with non-dialog class

PJ Arends25-Oct-11 17:44

PJ Arends

25-Oct-11 17:44

I would be interested to see your test code. I have no problems using a timer callback procedure.

Independent ACN Business Owner

Check out the possibilities for your future!
Financial independance
Full time or Part time
In more than 20 countries through North America, Europe, Asia and the Pacific
Featuring the ACN IRIS 5000 video phone. See the person you are talking to.

Within you lies the power for good - Use it!

Re: Using Timer with non-dialog class

PJ Arends25-Oct-11 17:52

PJ Arends

25-Oct-11 17:52

Looking at it further, the app does not need a window, but if there is no window then the thread needs a message loop.

Independent ACN Business Owner

Check out the possibilities for your future!
Financial independance
Full time or Part time
In more than 20 countries through North America, Europe, Asia and the Pacific
Featuring the ACN IRIS 5000 video phone. See the person you are talking to.

Within you lies the power for good - Use it!

Re: Using Timer with non-dialog class

Richard MacCutchan25-Oct-11 22:24

Richard MacCutchan

25-Oct-11 22:24

PJ Arends wrote:
the thread needs a message loop.

That's the issue; even with a callback the timer signals by posting a WM_TIMER message.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: Using Timer with non-dialog class

Chuck O'Toole26-Oct-11 5:09

Chuck O'Toole

26-Oct-11 5:09

I have a few apps like that (mostly system services) so at the end of "main()" (or whatever you use), stick code like this:

/* Fall into the standard message processing loop */

static MSG msg;
while (GetMessage(&msg, NULL, 0, 0))       /* wait for incoming message */
{
    TranslateMessage(&msg);        /* translate it */
    DispatchMessage(&msg);         /* and let windows dispatch it to WinProc */
}
return(msg.wParam);                /* done after "quit" message processed */

It doesn't hurt to sit in this loop while the other threads do their job and it allows them to post WM_CLOSE messages to run-down the process if necessary. Other standard messaging things works, including timers.

Re: Using Timer with non-dialog class

aangerma26-Oct-11 9:42

aangerma

26-Oct-11 9:42

Thanks for the reply,

can you give me more details how to use it?
How can I know which message I Received by msg?

Re: Using Timer with non-dialog class

Chuck O'Toole26-Oct-11 9:47

Chuck O'Toole

26-Oct-11 9:47

This is the standard windows message pump, it only causes windows messages to get processed for apps that are not "dialog based". You don't modify this code in any way nor look at the message in that loop. The "dispatch" is done by windows to the proper messsage handler. If you have dialogs, windows does this for you.

Re: Using Timer with non-dialog class

aangerma26-Oct-11 10:17

aangerma

26-Oct-11 10:17

Can you give me exmple how to write a messsage handler ,
I did it only with the class wizard of mfc,
and this is the first time I need to add a timer
to a class that don't connected to any window,
even if I creat a fictive window like dialog box the SetTimer(...)
works only if the dialog is opened by DoModal.

thanks

I don't understand the value of a token strtok_s

jkirkerx24-Oct-11 13:42

jkirkerx

24-Oct-11 13:42

I see all kinds of articles and documents on tokens using strtok_s, but none of them show how to get or capture the actual value of a token.

It looks like a token is a pointer, to a place in a char array. but it doesn't seem to give you the length. In the autos, it looks like an array of chars, but I know better now.

char *szServerName[50] = {""};
szServerName = token2;

would be invalid,

I figured out how to step through the source char array in a name value pair
eg. ServerName, DELL760
token1 = ServerName
token2 = DELL760

but I can't figure out how to capture the values. Plus you can't run token1 in a switch, because there is nothing to compare to.

void CA_SQLServer_Scan::_process_SQL_BufferData( std::vector<char> pData, int pLength )
{
    //  Copy the vector into a char array
    int msgLength = pData.size();
    char *szWords = new char[msgLength+1];
    for (int i = 0; i < msgLength; i++) {
      szWords[i] = pData[i];
    }
    szWords[ pData.size() ] = '\0';

    char seps[] = ";";
    char *token1, *next_token1, *token2, *next_token2;
    char *szServerName[50] = {""};
    char *szInstanceName[50] = {""};
    char *szClustered[5] = {""};
    char *szVersion[25] = {""};
    char *szTCP[5] = {""};
    char *szNP[80] = {""};

    if ( strcmp( szWords, "ServerName" ) !=0 &&
        strcmp( szWords, "InstanceName" ) !=0 &&
        strcmp( szWords, "Version" ) !=0)
    {
        token1 = strtok_s( szWords, seps, &next_token1);
        token2 = strtok_s( next_token1, seps, &next_token1);

        // Grab the first name value pair
        // szServerName = token2

        while (token1 != NULL || token2 !=NULL)
        {
            if ( token1 !=NULL || token2 !=NULL )
            {
                // The rest of the name value pairs
                token1 = strtok_s( next_token1, seps, &next_token2);
                token2 = strtok_s( next_token2, seps, &next_token1);
            }
        }
    }

    delete [] szWords;
}

Re: I don't understand the value of a token strtok_s

Software_Developer24-Oct-11 14:07

Software_Developer

24-Oct-11 14:07

this

char *szServerName[50] = {""};
szServerName = token2;

would be invalid,

use strcpy(szServerName,token2) instead of szServerName = token2;

more here

Re: I don't understand the value of a token strtok_s

Richard MacCutchan24-Oct-11 21:45

Richard MacCutchan

24-Oct-11 21:45

That won't work either since szServerName is defined as an array of pointers.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: I don't understand the value of a token strtok_s

Malli_S24-Oct-11 18:55

Malli_S

24-Oct-11 18:55

CSS

char *szServerName[50] = {""}; szServerName = token2; would be invalid,

Surely it's invalid. You just need to use strcpy() to copy the value from the token. And compare it with the required value.

[Delegates] [Virtual Desktop] [Tray Me !]

-Malli...!

Re: I don't understand the value of a token strtok_s

jkirkerx25-Oct-11 5:54

jkirkerx

25-Oct-11 5:54

OK, I found that out

Re: I don't understand the value of a token strtok_s

Richard MacCutchan24-Oct-11 21:44

Richard MacCutchan

24-Oct-11 21:44

I think there is quite a lot you don't understand unfortunately; this is a bit of a mess.

You need to understand the difference between a char* and a char* []. You are also using a vector in your function when you are just passing a null-terminated string. Given your array of SQL information you know that it is in pairs of strings <keyword>;<value> so you just need to split the string into it's constituent parts and process each keyword as required. Something like:

C++

void CA_SQLServer_Scan::_process_SQL_BufferData(char* pszData)
{
// pszData is the string extracted from the TCP stream buffer
    char *token1, *nextToken, *token2;
    char seps[] = ";";
    // pointers to saved token values
    char *szServerName = NULL;
    char *szInstanceName = NULL;
    char *szVersion = NULL;

    token1 = strtok_s(pszData, seps, &nextToken);
    // token1 points to the first keyword, which is now a null terminated string
    do {
        token2 = strtok_s(NULL, seps, &nextToken);
        // token2 points to the keyword's value string
        // check for any required keywords and save pointers to the values
        if (strcmp(token1, "ServerName") == 0)
            szServerName = token2;
        else if (strcmp(token1, "InstanceName") == 0)
            szInstanceName = token2;
        else if (strcmp(token1, "Version") == 0)
            szVersion = token2;
        // if token2 is NULL then there is no more data
        if (token2 == NULL)
            break;
        // get the next keyword token, and repeat
        token1 = strtok_s(NULL, seps, &nextToken);
    } while (TRUE);
    // the values saved above may now be copied elsewhere, printed, displayed on screen etc.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: I don't understand the value of a token strtok_s

jkirkerx25-Oct-11 6:11

jkirkerx

25-Oct-11 6:11

I had my bubble burst last night by another comment on my experimental code.

I tried if token1 == "ServerName", but it always came out false. Didn't think to use strcmp on the value. I tried to do a switch to, Switch (token1) but it wasn't valid.

Well like I said, I'm only 4 weeks into this. I think once I get a clear understanding of working with data in c++, everyone will see better cleaner code from me.

There alot of people from this technology company pushing me toward using vectors for everything, but I do really need to understand the char first.

Thanks in advance, let me soak it in for an hour.

Re: I don't understand the value of a token strtok_s

Richard MacCutchan25-Oct-11 6:41

Richard MacCutchan

25-Oct-11 6:41

jkirkerx wrote:
I had my bubble burst last night

Sorry to have to do it again, but I am finding it difficult to understand why you are working on this project when your knowledge of C/C++ is at the level it is. You seem to be struggling with some very basic concepts, which are vital to get your program to work. I would agree that using vectors (and other STL classes) would be a good thing but you really need to have a good grasp of the basics first.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: I don't understand the value of a token strtok_s

jkirkerx25-Oct-11 6:52

jkirkerx

25-Oct-11 6:52

I will private message you the reason why, if possible, I'm not that familiar with cp capabilities.
I want to stay within the parameters of the discussion rules.

Re: I don't understand the value of a token strtok_s

Richard MacCutchan25-Oct-11 7:07

Richard MacCutchan

25-Oct-11 7:07

Just click on the Email link at the bottom of this message.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Splitter with fixed size

Dialecticus24-Oct-11 8:28

Dialecticus

24-Oct-11 8:28

I have SDI application and two panes. I would like bottom pane to have fixed size (instead of top pane having it). When user moves splitting line bottom pane should maintain newly fixed size. When window is resized, so that there is no room for top pane, bottom pane should occupy whole area. When window is enlarged again bottom pane should occupy last fixed size (ie. enlarge to a certain point and then stay fixed). Standard CSplitterWnd does not have this functionality, and last pane is always expanded to the end, and all previous panes are fixed. I was searching here for appropriate splitter class, but no luck so far. Maybe I'm missing something obvious. Is there a ready made solution? How should I solve this problem?

Re: Splitter with fixed size

App_24-Oct-11 9:04

App_

24-Oct-11 9:04

Does this help?

If not, more here on splitters.

Re: Splitter with fixed size

Dialecticus24-Oct-11 9:30

Dialecticus

24-Oct-11 9:30

In linked article there is no mention of fixing the size of particular pane. The only advantage of featured class is that it works on CDialog, and that it uses registry. I've checked all other splitting classes, but either required functionality does not exist, or I can't find it. Hence the original question.

Re: Splitter with fixed size

TheGreatAndPowerfulOz24-Oct-11 9:51

TheGreatAndPowerfulOz

24-Oct-11 9:51

handle the WM_SIZE message in the parent class (parent of splitter), then size each splitter panel appropriately.

If your actions inspire others to dream more, learn more, do more and become more, you are a leader." - John Quincy Adams
You must accept one of two basic premises: Either we are alone in the universe, or we are not alone in the universe. And either way, the implications are staggering” - Wernher von Braun

Re: Splitter with fixed size

Dialecticus24-Oct-11 10:04

Dialecticus

24-Oct-11 10:04

My current solution is a monstrosity of a workaround that includes CMainFrame::OnSize handler, and a class derived from CSplitterWnd that exposes "ideal" sizes (you can set them but can't get them), and reroutes TrackRowSize/TrackColumnSize to CMainFrame so that proper size fiddling can be achieved. I am not proud of it, but it seems to be working for now.

Re: Solution: use CSplitterWnd::SetRowInfo

Goto_Label_24-Oct-11 11:18

Goto_Label_

24-Oct-11 11:18

First read Minimum size splitter

then try:

CSplitterWnd::SetRowInfo (horizontal)

Call this member function to set a new minimum height and ideal height for a row. The row minimum value determines when the row will be too small to be fully displayed.

When the framework displays the splitter window, it lays out the panes in columns and rows according to their ideal dimensions, working from the upper-left to the lower-right corner of the splitter window's client area.

void CMyFrame::OnSize(UINT nType, int cx, int cy) 
{
	if(::IsWindow(m_wndSplitter.m_hWnd) && ::IsWindow(m_wndSplitter2.m_hWnd))
	{
		m_wndSplitter.SetRowInfo(0, cy*2/3, 10);
		m_wndSplitter.SetRowInfo(1, cy/3, 10);

		m_wndSplitter2.SetColumnInfo(0, cx/4, 10);
		m_wndSplitter2.SetColumnInfo(1, cx*3/4, 10);
			
		RecalcLayout();
	}
}

CSplitterWnd::SetColumnInfo (verticle)

Call this member function to set a new minimum width and ideal width for a column. The column minimum value determines when the column will be too small to be fully displayed.

When the framework displays the splitter window, it lays out the panes in columns and rows according to their ideal dimensions, working from the upper-left to the lower-right corner of the splitter window's client area.
Example

void CChildFrame::OnSize(UINT nType, int cx, int cy) 
{
   CMDIChildWnd::OnSize(nType, cx, cy);

   CRect rect;
   GetWindowRect( &rect );
   if( m_bSplitterCreated )  // m_bSplitterCreated set in OnCreateClient
   {
      m_wndSplitter.SetColumnInfo(0, rect.Width()/2, 10);
      m_wndSplitter.SetColumnInfo(1, rect.Width()/2, 10);
      m_wndSplitter.RecalcLayout();
   }
}

CSplitterWnd::RecalcLayout

Call this member function to correctly redisplay the splitter window after you have adjusted row and column sizes with the SetRowInfo and SetColumnInfo member functions. If you change row and column sizes as part of the creation process before the splitter window is visible, it is not necessary to call this member function.

Re: Solution: use CSplitterWnd::SetRowInfo

Dialecticus24-Oct-11 22:48

Dialecticus

24-Oct-11 22:48

Thank you for MSDN reference, but my goal has nothing to do with splitter's minimum size. The ideal solution would be the one that has different RecalcLayout algorithm that recalculates layout the way I want it, having in mind what panes have fixed size (until user changes it), and what panes should be resized when the window is resized. Currently only the last pane is resized (the rightmost, or the "bottomest"), and all previous are fixed. Along with RecalcLayout rewrite there should be an update in TrackRowSize/TrackColumnSize so that fixed panes remain fixed (unless the user is resizing one just now), and resizable panes get resized to compensate for current pane reconfiguration.

Re: Splitter with fixed size

TheGreatAndPowerfulOz25-Oct-11 5:06

TheGreatAndPowerfulOz

25-Oct-11 5:06

I wonder if what you want to use is CDockablePane.

The MFC "Visual Studio" Project style (available in VS2010) demonstrates usage of the CDockablePane and has the behavior you're describing.

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