C / C++ / MFC Discussion Boards

tagopi14-Feb-13 0:14

14-Feb-13 0:14

Thanks for you reply.

Actually, I created one MFC Application using the Template, and its SDI. So, it creates list of files, Doc, View, etc. For View, i select the base class as CView (in the wizard itself).

I removed the default created menu and included my menu list.

Now, i added a simple dialog, and for that, I created a class also derived from CDialog. Following are the .h and .cpp file contents

.h file

C++

class CSelectOptionsDlg : public CDialog
{
public:
	CSelectOptionsDlg(CWnd* pParent = NULL);
	virtual BOOL OnInitDialog();

public:
	enum {IDD = IDD_SELECTOPTIONSDLG};

public:
	void OnOkClicked();

	DECLARE_MESSAGE_MAP()  
};

.cpp

C++

CSelectOptionsDlg::CSelectOptionsDlg(CWnd* pParent)
	: CDialog(CSelectOptionsDlg::IDD, pParent)
{

}


BEGIN_MESSAGE_MAP(CSelectOptionsDlg, CDialog)

	ON_COMMAND(IDOK, OnOkClicked)

END_MESSAGE_MAP() 

void CSelectOptionsDlg::OnOkClicked() 
{
	AfxMessageBox("Ok clicked");

	EndDialog(1);	
}

BOOL CSelectOptionsDlg::OnInitDialog()
{
	CDialog::OnInitDialog();
	return TRUE;
}

As I mentioned earlier, if i add this line in OnDraw, its drawing on the first time only,

C++

pDC->TextOut(20, 20, L"test sdi", 10);

Also, in MainFrm.cpp file,

C++

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
	ON_WM_CREATE()
	ON_COMMAND(ID_START, OnStartPlan )  
	ON_COMMAND(ID_STOP, OnStopPlan ) 
	ON_COMMAND(ID_SELECTOPTIONS, OnSelectOption ) 
	ON_COMMAND(ID_EXIT, OnExit ) 
END_MESSAGE_MAP()

C++

void CMainFrame::OnSelectOption()
{
	CSelectOptionsDlg cSODlg;
	cSODlg.DoModal();	
}

doing like this.

OnDraw is not calling everytime. What I need is, whenever i click ok and close the dialog, OnDraw need to be called. How can i do that? Any help.

Thanks.

Re: CView::OnDraw - related question

Richard MacCutchan14-Feb-13 0:41

Richard MacCutchan

14-Feb-13 0:41

As far as I recall from my MFC days, a Window's OnDraw() procedure will get called when the dialog closes, so this should happen automatically. Unfortunately that's the part of the code that you did not show us. You may like to add some breakpoints and use your debugger to see the flow of code when the dialog closes.

Re: CView::OnDraw - related question

tagopi14-Feb-13 1:33

tagopi

14-Feb-13 1:33

Hello Richard,

I debug the whole code by putting breakpoints in all the functions, after closing the dialog, its not going anywhere in the code, remains on the application itself.
I am attaching the code herewith. Please download and check.

http://www.4shared.com/zip/eDwcyehu/SDITest.html[^]

Thanks.

Re: CView::OnDraw - related question

Richard MacCutchan14-Feb-13 1:41

Richard MacCutchan

14-Feb-13 1:41

Sorry, I cannot download that. you need to check that your OnDraw() function is being activated properly. If necessary you may need to add a call to UploadAllViews() after the dialog closes.

Re: CView::OnDraw - related question

chaau14-Feb-13 13:26

chaau

14-Feb-13 13:26

To force the window to redraw (any window, not only view) you need to call CWnd::Invalidate()[^] method. Calling it will trigger all the drawing routines

Visual Studio Display Thread question

ForNow13-Feb-13 21:53

ForNow

13-Feb-13 21:53

Hi,

I created 1 worker thread AFxBeginThread and 4 UI Thread via new CWinThread

However when I look at the thread display under debug Visual Studio display all threads as Worker Threads

Thanks

Re: Visual Studio Display Thread question

Richard MacCutchan13-Feb-13 22:26

Richard MacCutchan

13-Feb-13 22:26

And do you have a question, related to C++?

Re: Visual Studio Display Thread question

ForNow14-Feb-13 3:15

ForNow

14-Feb-13 3:15

I thought about posting this in a different forum
But the concept of UI threads and worker threads
is MFC

Re: Visual Studio Display Thread question

Albert Holguin14-Feb-13 4:07

Albert Holguin

14-Feb-13 4:07

I never quite placed much attention as to how threads are labeled in the debug display but... does it really matter? A UI thread is really just a label for a thread, it differs only in the extra functionality that comes from the framework around it, so does the label really make a difference? If it works fine why are you worried about the label the debugger is using?

Re: Visual Studio Display Thread question

David Crow14-Feb-13 5:23

David Crow

14-Feb-13 5:23

ForNow wrote:

I created 1 worker thread AFxBeginThread and 4 UI Thread via new CWinThread

Maybe I'm misunderstanding your intent here, but worker threads and UI threads are both created using AfxBeginThread(). The difference is whether the thread has a message pump or not.

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Re: Visual Studio Display Thread question

ForNow14-Feb-13 7:08

ForNow

14-Feb-13 7:08

Sorry you are right the different UI

Has CWinThread::Run. While workers have a thread proc

................

Member 981141113-Feb-13 19:21

Member 9811411

13-Feb-13 19:21

........

modified 26-Feb-13 6:47am.

Re: upload data using xmlhttp( need an urgent help)

Richard MacCutchan13-Feb-13 22:25

Richard MacCutchan

13-Feb-13 22:25

Why are you using CStrings for your data buffers, and why are you trying to convert the file content with wcstombs()? Use the BYTE (unsigned char) type for your data buffer, and read the files in binary mode.

Message Closed

14-Feb-13 0:34

Member 9811411

14-Feb-13 0:34

Message Closed

Re: upload data using xmlhttp( need an urgent help)

Richard MacCutchan14-Feb-13 0:47

Richard MacCutchan

14-Feb-13 0:47

I already told you how to do it. Do not use CString it will not work. And do not convert the file contents, it will leave you with corrupt data. A file is just a stream of bytes and in moving it from one location to another you should process it as such.

Message Closed

14-Feb-13 18:33

Member 9811411

14-Feb-13 18:33

Message Closed

modified 15-Feb-13 1:10am.

Re: upload data using xmlhttp( need an urgent help)

Richard MacCutchan14-Feb-13 22:52

Richard MacCutchan

14-Feb-13 22:52

If there is still a problem in this code then you need to run it through your debugger and isolate the point of failure. We cannot guess what is happening without more information.

Message Closed

15-Feb-13 18:30

Member 9811411

15-Feb-13 18:30

Message Closed

Re: upload data using xmlhttp( need an urgent help)

Richard MacCutchan15-Feb-13 22:10

Richard MacCutchan

15-Feb-13 22:10

I have no idea what is happeniong with this, but I would suggest you look at the documentation for the send() method[^] to check that you are using the correct format for your data.

Reading a comma delimited file to array

Jeffrey Webster13-Feb-13 14:39

Jeffrey Webster

13-Feb-13 14:39

Hi,

I'm hitting a snag as I try to read back an array which has been written to a text file. Here's the relevant part of the code:

if((fp=fopen("myfile","r"))==NULL)
 {
    printf("Unable to open file.\n");
    exit(1);
 }
  for(j=0;j<6;j++)
  {
     for(l=0;l<7;l++)
     {
        k=fgetc(fp);
         if(k==",") break;
        str2[j][l]=k;

     }
  }
   fclose(fp);
 for(j=0;j<6;j++)
 {
   for (l=0;l<7;l++)
   {
      printf("%c", str2[j][l]);
   }
 }

This is generating an error:
[Warning] comparison between pointer and integer.

Though it runs, it is revealing that the break code which checks for a comma is not functioning as the compiler warns. Why is it claiming this is a pointer? Why is it saying anything about an integer when I've deliberately cast k as a character?

Thanks for any input.
------

Update: The problem was solved by: (a) changing the double quotes to single quotes (apostrophes) and (b) switching

if(k==",") break;

below the assignment. In order to match the file derived string with one defined in code I also had to modify it:

str2[j][strlen(str2[j]-1]='\0';

as there is something foreign added in the file transfer process.
Thanks, and if there is a mark as solved button I couldn't find it Smile | :)

modified 14-Feb-13 16:08pm.

Re: Reading a comma delimited file to array

Sivaraman Dhamodharan13-Feb-13 19:10

Sivaraman Dhamodharan

13-Feb-13 19:10

Try this:
k=fgetc(fp);
if(k==',') break;

Hope that will work.

Programming Article

Re: Reading a comma delimited file to array

Jeffrey Webster13-Feb-13 20:25

Jeffrey Webster

13-Feb-13 20:25

Hi,
Thanks for the reply.
As far as I can see that's what I have except without the assignment to the array:

str2[j][l]=k

but that is basically what I'm trying to accomplish. The printing at the end is just to confirm that the file was successfully written to the array.

Re: Reading a comma delimited file to array

Graham Breach13-Feb-13 21:33

Graham Breach

13-Feb-13 21:33

Replace the double-quotes in your comparison with single-quotes. In C and C++, double-quotes mean a pointer to a string of characters, but single-quotes mean a character literal.

Re: Reading a comma delimited file to array

Jeffrey Webster14-Feb-13 4:15

Jeffrey Webster

14-Feb-13 4:15

Hi, thanks for your response. That helped. I also changed the control in the inside printf loop to

for(l=0;*(str2[j]+l);l++)

Now it's compiling with no warnings and is reading back pretty good text, though there is some stray characters after some of the words in the test text.

Re: Reading a comma delimited file to array

Richard MacCutchan13-Feb-13 22:17

Richard MacCutchan

13-Feb-13 22:17

Why are you making life so complicated for yourself? Use a tokeniser such as strtok()[^].

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