C / C++ / MFC Discussion Boards

loyal ginger28-Dec-09 10:53

28-Dec-09 10:53

That's why software engineer positions were drained out. I hope companies can tell if an applicant is really good or just one of these "programming gods" like this.

Dialog display position

Anu_Bala17-Dec-09 18:38

Anu_Bala

17-Dec-09 18:38

I want to display my dialog in upperpart of screen.So, i use SetWindowPos() in OnInitDialog().
But it doesnot work.It display the dialopg in centre of the screen.
BOOL CMFCButtonDlg::OnInitDialog()
{
CDialog::OnInitDialog();
SetWindowPos(&CWnd::wndTopMost,0,0,100,1000,SWP_NOSIZE);
return TRUE; // return TRUE unless you set the focus to a control
}
Wats my mistake?

Anu

Re: Dialog display position

Madhu Nair17-Dec-09 18:53

Madhu Nair

17-Dec-09 18:53

Confirm you haven't clicked the 'center window' property of the dialog.

Re: Dialog display position

Anu_Bala17-Dec-09 18:57

Anu_Bala

17-Dec-09 18:57

Its in False.

Anu

Re: Dialog display position

pacotest17-Dec-09 19:03

pacotest

17-Dec-09 19:03

you can try
MoveWindow function

Re: Dialog display position

«_Superman_»17-Dec-09 19:56

«_Superman_»

17-Dec-09 19:56

The Window is placed in the default position by the MFC framework after the OnInitDialog function has been called. So placing SetWindowPos in the OnInitDialog function is no good.
Create a custom message and map it to a function using the ON_MESSAGE macro.
In the mapped function put the SetWindowPos function call.
At the end of the OnInitDialog function, do a PostMessage for the custom message.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Re: Dialog display position

Michael Schubert17-Dec-09 21:01

Michael Schubert

17-Dec-09 21:01

You have to override WM_WINDOWPOSCHANGING and place your SetWindowPos there:

void YourDlg::OnWindowPosChanging(WINDOWPOS FAR* lpwndpos) 
{
  CDialog::OnWindowPosChanging(lpwndpos);

  SetWindowPos(&CWnd::wndTopMost,0,0,100,1000,SWP_NOSIZE);
}

Re: Dialog display position

Anu_Bala17-Dec-09 22:34

Anu_Bala

17-Dec-09 22:34

Perfectly working..Thank you so much...

Anu

Open and show File

Paulraj G17-Dec-09 16:50

Paulraj G

17-Dec-09 16:50

Hi...

Hi...

I am having a file in C:\\Test.txt. If i click a button that file have to open in window. This is not for read or write. To show the file like if we double click the file.

if you know please help me.

thanks...

G.Paulraj

Re: Open and show File

pacotest17-Dec-09 18:05

pacotest

17-Dec-09 18:05

that easy
use the WinExec function or ShellExecute

Re: Open and show File

Paulraj G17-Dec-09 18:18

Paulraj G

17-Dec-09 18:18

yes... i used ShellExecute.

G.Paulraj

"This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information."

Alan Kurlansky17-Dec-09 11:35

Alan Kurlansky

17-Dec-09 11:35

I am getting this message:
"This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information."

I see there's a fix for Windows XP, can that be applied to a windows nt/2003 server or is there another fix for this machine?

Re: "This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information."

Abhi Lahare17-Dec-09 17:18

Abhi Lahare

17-Dec-09 17:18

Do you have source code for this program?
or Are you getting this error in specific build ( Debug Vs Release)?

Re: "This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information."

Alan Kurlansky18-Dec-09 2:32

Alan Kurlansky

18-Dec-09 2:32

I have source code for the program and am getting the error in the release build. Actually I haven't been able to build a debug version. I get link errors and as yet haven't made the effort to get the debug build to work.

Re: "This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information."

Abhi Lahare18-Dec-09 4:35

Abhi Lahare

18-Dec-09 4:35

What's the linker error you are getting in your debug build?

Thx
AL

Re: "This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information."

Alan Kurlansky18-Dec-09 10:46

Alan Kurlansky

18-Dec-09 10:46

Actually, after I responded to your last post I took the time to fix the linker errors. Now it builds and runs. But more generally I seem to get this effect recently when I have a bug in my app. Then when I go to debug, it traps to some debug hook location. Since I've been working with VS for about a year now, this is new to me. So I'm not sure what to do next to debug since it's not breaking in a way that I can see a trace of how the program got to this point. The old tried and true approach is to scatter printf statements around and try to zero in on the trouble spot. That generally seems to work. Any suggestions are welcome.
Thanks

How to check whether a char pointer is an empty string?

dipuks17-Dec-09 10:05

dipuks

17-Dec-09 10:05

Hey

I have a variable,

char * p

which could sometimes have a string or sometimes
it will be empty.

How to check whether "p" has a string in it or not?

I see that its not possible to do something like,

if(p != "")
{
}

Thanks

Re: How to check whether a char pointer is an empty string?

krmed17-Dec-09 10:36

krmed

17-Dec-09 10:36

Perhaps you could use

if(*p = 0);

But then this assumes you initialize the pointer when it is emptied.

char* p = NULL;
// use your pointer
p = &some_char_array;
// do whatever with it
p = NULL;

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: How to check whether a char pointer is an empty string?

harold aptroot17-Dec-09 10:58

harold aptroot

17-Dec-09 10:58

krmed wrote:
if(*p = 0);

Don't you mean == there?

Re: How to check whether a char pointer is an empty string?

krmed17-Dec-09 11:34

krmed

17-Dec-09 11:34

Yes, of course! Just typed too fast.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

Re: How to check whether a char pointer is an empty string?

Tim Craig17-Dec-09 17:54

Tim Craig

17-Dec-09 17:54

If you set p equal to NULL and then dereference it with *p, you'll get a crash. Maybe if you set *p = '\0' or *p = "\0".

You measure democracy by the freedom it gives its dissidents, not the freedom it gives its assimilated conformists.

Re: How to check whether a char pointer is an empty string?

CPallini17-Dec-09 11:01

CPallini

17-Dec-09 11:01

you may check for an empty string with

if (strlen(p)==0)
{
//..
}

the above check, of course, assumes p pointing to a valid string (empty string is a valid one).
i.e. such code doesn't check if p is a valid pointer, to spot the difference, try:

char *p, *q;
p="";
q=NULL;

printf("strlen(p)=%d\n", strlen(p));
printf("strlen(q)=%d\n", strlen(q));

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: How to check whether a char pointer is an empty string?

Fatbuddha 117-Dec-09 22:14

Fatbuddha 1

17-Dec-09 22:14

Why not use a string type?
There you can check easily.
However, if you have to use a char *, then you have to care about setting the pointer to NULL or to a '\0' char. this would be the end of a string. As you like.

The cleaner version, I would say, would be to use a string object.

Cheers

You have the thought that modern physics just relay on assumptions, that somehow depends on a smile of a cat, which isn’t there.( Albert Einstein)

No Idea why the linker is giving error

Larry Mills Sr17-Dec-09 9:36

Larry Mills Sr

17-Dec-09 9:36

In my PropertyPage header I have this declaration:

#include "CookItDBDoc.h"

// CSpecial2Page1 dialog

class CSpecial2Page1 : public CBCGPPropertyPage
{
     DECLARE_DYNAMIC(CSpecial2Page1)

public:
     CSpecial2Page1();
     //CWnd* pParent = NULL, int nDlg = 0, CString csDlgName = "");   // standard constructor
     virtual ~CSpecial2Page1();

     void RetFromGetSpecialMealDlg(CString csFileName);

// Attributes
public:

     CCookItDBDoc* GetDocument() const;
...
}

============> in .cpp file <========================

void CSpecial2Page1::RetFromGetSpecialMealDlg(CString csFileName)
     {
     m_csFileName = csFileName;
     FileReadCatMenuXML(m_csFileName);
     FileReadSpecialMenuXML(m_cMenuData.m_csFullFilePath);
     CSpecial2* pPS = (CSpecial2*)GetParent();
     pPS->SetSpecial(m_cSpecialData);
     pPS->SetMenuData(m_cMenuData);
     SetDlgItemText(IDC_SELDRINKS,m_cSpecialData.m_csSpecialOccassionName);
     FileReadDrinkMenuXML(m_cSpecialData.m_csDrinkFilePath);
     InsertItemsDrink();
     GetDocument()->OnNewSpecialDrink(m_vDrink, m_cSpecialData.m_csSpecialOccassionName);
     }

the error is this:

1>Linking...
1>Special2Page1.obj : error LNK2019: unresolved external symbol "public: class CCookItDBDoc * __thiscall CSpecial2Page1::GetDocument(void)const " (?GetDocument@CSpecial2Page1@@QBEPAVCCookItDBDoc@@XZ) referenced in function "public: void __thiscall CSpecial2Page1::RetFromGetSpecialMealDlg(class ATL::CStringT<char,class StrTraitMFC<char,class ATL::ChTraitsCRT<char> > >)" (?RetFromGetSpecialMealDlg@CSpecial2Page1@@QAEXV?$CStringT@DV?$StrTraitMFC@DV?$ChTraitsCRT@D@ATL@@@@@ATL@@@Z)
1>C:\Users\Larry A Mills Sr\Documents\Visual Studio 2008\Projects\CookItDB\Debug\CookItDB.exe : fatal error LNK1120: 1 unresolved externals
1>Build log was saved at "file://c:\Users\Larry A Mills Sr\Documents\Visual Studio 2008\Projects\CookItDB\CookItDB\Debug\BuildLog.htm"
1>CookItDB - 2 error(s), 0 warning(s)

I thought maybe I had mispelled something so I checked:

in Doc header:

     void OnNewSpecialDrink(CDrinkDataVec vData, CString csMealPlan);
in Doc cpp:

// CCookItDBDoc commands
void CCookItDBDoc::OnNewSpecialDrink(CDrinkDataVec vData, CString csMealPlan)
     {
     m_vDrink = vData;
     CDrinkData cData;
     int nIndex = 0;
     int nTotal = m_vDrink.m_vDrinkData.size();
            .....
            }

the problem is with this:
GetDocument()->OnNewSpecialDrink(m_vDrink, m_cSpecialData.m_csSpecialOccassionName);
specifically this:

     CCookItDBDoc* GetDocument() const;
I do NOT understand why this is so does anyone else?

A C++ programming language novice, but striving to learn

Re: No Idea why the linker is giving error

krmed17-Dec-09 10:39

krmed

17-Dec-09 10:39

Your CSpecial2Page1 is apparently derived from a class you derived from CPropertyPage, and that class does not have a GetDocument method.

Unless you've defined that method in your CBCGPPropertyPage class, it doesn't exist and that's why you get the error.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

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