Re: Window focus - C / C++ / MFC Discussion Boards

Re: Window focus

Halawlaws25-Jul-05 6:06

Halawlaws

25-Jul-05 6:06

GetDlgItem() is returning NULL
WHY?

/\|-||\/|/\|)

Re: Window focus

David Crow25-Jul-05 6:27

David Crow

25-Jul-05 6:27

Halawlaws wrote:
WHY?

Because no such control having an id IDD_AUTOMATIC exists at the point in which GetDlgItem() is being called.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Window focus

Trollslayer25-Jul-05 7:11

Trollslayer

25-Jul-05 7:11

I have to say David, I'm surprised at your patience !

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Re: Window focus

David Crow25-Jul-05 7:32

David Crow

25-Jul-05 7:32

Why would that surprise you?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Window focus

David Crow25-Jul-05 6:26

David Crow

25-Jul-05 6:26

Halawlaws wrote:
if (Lp.checkcon2() && (GetFocus() == GetDlgItem(IDD_AUTOMATIC)))

I've yet to figure out why people do this and then complain that it does not work.

To figure out exactly which part of the above statement is not working, break it up into manageable pieces, like:

// set a breakpoint on this line and single-step through each statement.
// note the value of pWnd1 and pWnd2 along the way
CWnd *pWnd1 = GetFocus();
if (pWnd1 != NULL)
{
    CWnd *pWnd2 = GetDlgItem(IDD_AUTOMATIC);
    if (pWnd2 != NULL)
    {
        if (pWnd1 == pWnd2)
            ...
    }
}

At this point, you should know the return value of GetFocus() and GetDlgItem() and whether they are equal or not.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Window focus

David Crow25-Jul-05 5:45

David Crow

25-Jul-05 5:45

Halawlaws wrote:
...but how can i know that this is the window i want or not?

Because you already have a handle to that window. Just compare the two.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Window focus

Halawlaws25-Jul-05 5:50

Halawlaws

25-Jul-05 5:50

what is it?

/\|-||\/|/\|)

Re: Window focus

Marc Soleda25-Jul-05 5:42

Marc Soleda

25-Jul-05 5:42

GetFocus() returns a handle that you can compare with the your window's handle.
If it is, your window has the focus.

Marc Soleda.

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

Use a DLLs, which uses mfc as shared dll, from App. that uses mfc as static dll.

Yaeli!!!25-Jul-05 4:47

Yaeli!!!

25-Jul-05 4:47

Hi
I got a package of dlls, some compiled as:
- "MFC Extension DLL (using shared MFC DLL)"
- and other as "Regular DLL using shared MFC DLL"
I want to compile myown application which uses those DLLs, in "Use MFC in a Static Library" mode.

but i'm getting the following linking errors:

Linking...
msvcrt.lib(MSVCRT.dll) : error LNK2005: "public: int __thiscall type_info::operator==(class type_info const &)const " (??8type_info@@QBEHABV0@@Z) already defined in libcmt.lib(typinfo.obj)
msvcrt.lib(MSVCRT.dll) : error LNK2005: __setmbcp already defined in libcmt.lib(mbctype.obj)
msvcrt.lib(MSVCRT.dll) : warning LNK4006: "public: int __thiscall type_info::operator==(class type_info const &)const " (??8type_info@@QBEHABV0@@Z) already defined in libcmt.lib(typinfo.obj); second definition ignored
msvcrt.lib(MSVCRT.dll) : warning LNK4006: __setmbcp already defined in libcmt.lib(mbctype.obj); second definition ignored
Creating library Release/IFL_Sample.lib and object Release/IFL_Sample.exp
nafxcw.lib(nolib.obj) : warning LNK4098: defaultlib "mfc42.lib" conflicts with use of other libs; use /NODEFAULTLIB:library
nafxcw.lib(nolib.obj) : warning LNK4098: defaultlib "mfcs42.lib" conflicts with use of other libs; use /NODEFAULTLIB:library
libcmt.lib(crt0init.obj) : warning LNK4098: defaultlib "msvcrt.lib" conflicts with use of other libs; use /NODEFAULTLIB:library
Release/IFL_Sample.exe : fatal error LNK1169: one or more multiply defined symbols found
Error executing link.exe.

Thanks in advance!

Yael

Re: Use a DLLs, which uses mfc as shared dll, from App. that uses mfc as static dll.

Cool Ju25-Jul-05 19:38

Cool Ju

25-Jul-05 19:38

In Project Settings->Link Tab

There will be Ignore Default Libraries checkbox. check that and again rebuild ur code. Give it a try...

Bye
Cool Ju Cool | :cool:

How to call parent function from child?

dy1325-Jul-05 4:46

dy13

25-Jul-05 4:46

I have a function MessageBubble(CString someMessage) which is located in the main dialog class of my app(MFC). I want to be able to call this function from any of the child objects. How would I go about doing this? Thanks.

Re: How to call parent function from child?

Marc Soleda25-Jul-05 4:59

Marc Soleda

25-Jul-05 4:59

If it's really in the main dialog you'll need to declare a public method and call it from the child one:

CYourMainDlg* pMainDlg = GetParent();
pMainDlg->YourPublicMethod();

Marc Soleda.

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

Use a DLLs, which uses mfc as shared dll, from App. that uses mfc as static dll.

Anonymous25-Jul-05 4:43

Anonymous

25-Jul-05 4:43

Pointers

sroberts8225-Jul-05 4:39

sroberts82

25-Jul-05 4:39

Hi, This is a really basic question but I just want to be doubley sure. The difference between BOOL* whatever; and BOOL *whatever;
?

Re: Pointers

C^hris L^osinger25-Jul-05 4:44

C^hris L^osinger

25-Jul-05 4:44

no difference to the compiler.

both are pointers to BOOL. some people like to put the * next to the pointed-to type to emphasize that the * is actually part of the variable's type. some like it near the variable name.

Cleek | Image Toolkits | Thumbnail maker

Re: Pointers

toxcct25-Jul-05 5:53

toxcct

25-Jul-05 5:53

even the same to BOOL*whatever, BOOL * whatever, and

BOOL<br />
*<br />
whatever

...

TOXCCT >>> GEII power
[toxcct][VisualCalc]

std::string and looping backward

LCI25-Jul-05 4:36

LCI

25-Jul-05 4:36

I wrote a small method that will strip all the spaces from the end of an basic_string up until is reaches text.
So a string like "This is a test " .. would be
"This is a test" once the method is complete.

Something is not working correctly though.

typedef std::string::size_type size_type;
std::string AnyString;
char MySpace = ' ';
size_type CHAR_INDEX;

CHAR_INDEX = AnyString.size();

for (size_type i = CHAR_INDEX;AnyString[i]== MySpace; i--)
AnyString.erase(i,1);

The above source only works when stripping one space, like from
"2003 " to "2003".

If i have "2003 ", it does not work. Can anyone tell me what i am doing wrong here?

Re: std::string and looping backward

C^hris L^osinger25-Jul-05 4:56

C^hris L^osinger

25-Jul-05 4:56

isn't i going to be out of bounds as soon as you hit that loop? a string of length 10 won't have an element 10, it'll only have 0..9 .

---

here's how i did a TrimRight

string TrimRight(string str)
{
  const TCHAR	* szTrimChars = _T( " \t" );
  int nIdx	= str.find_last_not_of(szTrimChars);
  if ( str.npos == nIdx )
  {
	str.erase();
  }
  else
  {
	char tSave	= str.at(nIdx);
	m_str.erase(nIdx, str.npos);	
	m_str.append(1, tSave);
  }
  return str;
}

Cleek | Image Toolkits | Thumbnail maker

Re: std::string and looping backward

LCI25-Jul-05 5:54

LCI

25-Jul-05 5:54

Even if i start at element 9.
my method still does nto work correctly.
Any idea what i am doing wrong

Re: std::string and looping backward

S. Senthil Kumar25-Jul-05 6:27

S. Senthil Kumar

25-Jul-05 6:27

Strange things happen if you try to modify the collection you are looping over. The best thing is to copy the string, loop over the original string but delete elements from the copy. Finally, assign the copy to the original string.

Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro

Re: std::string and looping backward

LCI25-Jul-05 10:37

LCI

25-Jul-05 10:37

I do the following based on your suggestion but still cannot get it to work if there is more than 1 space to be removed before i hit text

typedef std::string::size_type size_type;
std::string strTemp;
char MySpace = ' ';
size_type CHAR_INDEX;

strTemp = AnyString;

CHAR_INDEX = strTemp.size();
CHAR_INDEX--;

for (size_type i = CHAR_INDEX; AnyString[i]== MySpace; i--)
strTemp.erase(i);

AnyString = strTemp;

i need help in file.dat

sara-m25-Jul-05 3:47

sara-m

25-Jul-05 3:47

hello...

i want to ask about filename.dat
how can i put images (jpeg or any other format)in the file.dat,i want to know the steps, and how they will be in that file .
please answer me ,it's very important to me.
thanks

Re: i need help in file.dat

David Crow25-Jul-05 4:18

David Crow

25-Jul-05 4:18

Your question is a bit on the unclear side. You are wanting to write image data to a file named filename.dat (or file.dat). Correct? Where are you getting this image data from?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: i need help in file.dat

sara-m25-Jul-05 6:45

sara-m

25-Jul-05 6:45

hello
i need to Store the content of the image file inside the filename.dat.
i want to perform this because i am trying to execute face detection using version 1.2 of the frontal face detector code (http://www.cc.gatech.edu/~wujx)
the auther used cars in his file.dat .
i want to use faces .how can i perform that.
thanks

Re: i need help in file.dat

David Crow25-Jul-05 7:05

David Crow

25-Jul-05 7:05

sara-m wrote:
i need to Store the content of the image file inside the filename.dat.

If you already have the face data in a buffer of some sort, then you simply need to call CreateFile(), WriteFile(), and CloseHandle().

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

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