C / C++ / MFC

Re: How can i access my fat table of hard drive through codding [modified]

4-Dec-07 7:25

JudyL_FL wrote:
Someone will help if and when they want to.

What kind of service is that? For the price we are paying, someone should be on call 24/7. Questions must be answered in a timely manner. Big Grin | :-D

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

JudyL_MD4-Dec-07 9:22

JudyL_MD

4-Dec-07 9:22

Yessss maassstteer <best igor accent>

modified on Tuesday, December 04, 2007 4:15:28 PM

Re: How can i access my fat table of hard drive through codding

Nelek4-Dec-07 21:30

Nelek

4-Dec-07 21:30

Greetings.

--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson

Error LNK2019

wira1guys3-Dec-07 17:40

wira1guys

3-Dec-07 17:40

I had problem with error LNK2019, I can't create MFC with CFormView.

error LNK2019: unresolved external symbol "public: __thiscall CFormView::CFormView(unsigned int)" (??0CFormView@@QAE@I@Z) referenced in function "protected: __thiscall CaView::CaView(void)" (??0CaView@@IAE@XZ)

Toxcct told me the problem is : missing the mfc link somewhere in your linker settings.
How to fix it?

Hamid_RT3-Dec-07 19:39

Hamid_RT

3-Dec-07 19:39

Do you have this error in this project or all projects?

wira1guys3-Dec-07 20:26

wira1guys

3-Dec-07 20:26

All project.
The error appear, when I create a new project using CFormView.

It will be no error if I use CView.
For more explanation, the VC2005 still able to open my last project which use CFormView.

Thanks in advance, waiting for your reply.

David Crow4-Dec-07 7:27

4-Dec-07 7:27

The error is complaining about not being able to find CFormView's constructor. What does your CaView constructor look like?

wira1guys4-Dec-07 19:49

wira1guys

4-Dec-07 19:49

I had this problem for few days, n make me upset.
At least, I fix the problem by install it from the beginning.
Do not reinstall, I had tried n it's not worked. So I uninstalled first, clean the registry, after that install again.

Thanks anyway, for Hamid and David.

How to Use libpng?

manish.patel3-Dec-07 17:37

manish.patel

3-Dec-07 17:37

Hello All,

I want to use png compression for my image data compression(not file).
I am capturing window from the screen and now i want to compress it with png. Is there anybody who had use libpng to compress image data?

I had also see its documentation but i am not getting anything. I had also put it on its mailing list but no one is answering.

Please Help its urgent.

Thanks in advance.

Manish Patel.
B.E. - Information Technology.

Re: How to Use libpng?

Hamid_RT3-Dec-07 19:37

Hamid_RT

3-Dec-07 19:37

Did you see CXImage article on the codeproject?

MoveWindow()

Oliver1233-Dec-07 16:25

Oliver123

3-Dec-07 16:25

I want to change the position and size of a window. In the constructor of the Doc window of a VC++ SDI I have the following code. (I'd also like to do this in any window I make.)

CSDITESTfDoc::CSDITESTfDoc()<br />
{<br />
	MoveWindow(5,5,500,500,TRUE);<br />
}

The compiler says MoveWindow does not take 5 paramaters.

The format of the command is:
void MoveWindow(int x, int y, int nWidth, int nHeght, BOOL bRepaint = TRUE)

Where am I going wrong? Thanks.

Re: MoveWindow()

bob169723-Dec-07 17:13

bob16972

3-Dec-07 17:13

Your doc class does not derive from CWnd so the system will try to use the MoveWindow from the Win32 API...

BOOL MoveWindow(
HWND hWnd, // handle to window
int X, // horizontal position
int Y, // vertical position
int nWidth, // width
int nHeight, // height
BOOL bRepaint // repaint flag
);

Your view class does derive from CWnd so try that tactic but from within the view class or use a reference or pointer to a view object.

Re: MoveWindow()

Hamid_RT3-Dec-07 19:36

Hamid_RT

3-Dec-07 19:36

First parameter is handle to a window(HWND).

Re: MoveWindow()

David Crow4-Dec-07 7:29

In a vector: How to locate a certain element; then erase just that element

4-Dec-07 7:29

Move your window from the main frame, not the document.

Larry Mills Sr3-Dec-07 10:49

Re: In a vector: How to locate a certain element; then erase just that element

3-Dec-07 10:49

========================== headers ======================
// MyTrailer.h

#if !defined(AFX_MYTRAILER_H)
#define AFX_MYTRAILER_H

#include <string>

class CMyTrailer {
public:
// Varables
CString m_csItem;
CString m_csMFG;
CString m_csID;

CMyTrailer();
~CMyTrailer();

};

#endif
// Trailer.h

#if !defined(_TRAILER_H)
#define _TRAILER_H

#include <vector>
#include "MyTrailer.h"

class CMyTrailer;

using std::vector;
using std::copy;
using std::iterator;
using std::string;

class CTrailer {

public:
CTrailer(int nIsPage=0);
~CTrailer();

// Varables:
CMyTrailer m_MyTrailer;
// Vectors:
// Setup vectors:
std::vector<CMyTrailer> m_vTlr; // Item
// Iterators:
std::vector<CMyTrailer>::iterator m_ITTrlr;
//Functions:

};

#endif

=================== end headers ==========================
CTrailer m_Trlr2(2); // create instance

================= 7th element in vector ===================
m_Trlr2.m_MyTrailer.m_csItem = "Tire";
m_Trlr2.m_MyTrailer.m_csMFG = "Goodyear";
m_Trlr2.m_MyTrailer.m_csID = "1110109";
===========================================================

How would I find the 7th element(could be anywhere but I'm using the example that it is the 7th element) in the vector when searching by
m_Trlr2.m_MyTrailer.m_csID ?
How woulod I erase only the 7th element? and would there be a blank spot in the vector after the 7th element is erased?
A C++ programming language novice, but striving to learn

Stephen Hewitt3-Dec-07 13:42

Stephen Hewitt

3-Dec-07 13:42

Since vectors have random access iterators[^] something like this will do the trick:

m_vTlr.erase(m_vTlr.begin()+6)

Note this code assumes the vector contains at least 7 elements: you'll get undefined behaviour if it doesn't!

Steve

Re: In a vector: How to locate a certain element; then erase just that element

Stephen Hewitt3-Dec-07 13:50

Stephen Hewitt

3-Dec-07 13:50

As for searching I'd:

1. Add an operator== for CMyTrailer:

class CMyTrailer
{
public:
	// Varables
	CString   m_csItem;
	CString   m_csMFG;
	CString   m_csID;
          
	CMyTrailer();
	~CMyTrailer();
};
 
inline bool operator==(const CMyTrailer &lhs, const CMyTrailer &rhs)
{
	return lhs.m_csID==rhs.m_csID;
}

2. Now search as follows:

vector<CMyTrailer>::iterator i = std::find(m_vTlr.begin(), m_vTlr.end(), CString("FindMe"));
if (i!=m_vTlr.end())
{
	// Found it!
}

The above code assumes you've included algorithm.

Steve

modified on Monday, December 03, 2007 10:06:57 PM

Re: In a vector: How to locate a certain element; then erase just that element [modified]

Larry Mills Sr4-Dec-07 5:45

Re: In a vector: How to locate a certain element; then erase just that element

4-Dec-07 5:45

What about erase? When I find the element in the vector I want to erase it from the vector WITHOUT leaving a blank spot in the vector.
Thanks for using my code names; it sure makes it easier to understand what someone is telling me nwhen they use my code names to explain things. Thanks.

I get this error message when I included the inline function - I included it inside the class declaration - Right?
error: error C2804: binary 'operator ==' has too many parameters
#include <algorithm>

class CMyTrailer {
public:
// Varables
CString m_csItem;
CString m_csMFG;
CString m_csID;

CMyTrailer();
~CMyTrailer();

inline bool operator==(const CMyTrailer &lhs, const CMyTrailer &rhs)
{
return lhs.m_csID==rhs.m_csID;
}

};

#endif

<div class="ForumSig">A C++ programming language novice, but striving to learn</div>
<div class="ForumMod">modified on Tuesday, December 04, 2007 12:54:42 PM</div>

David Crow4-Dec-07 7:33

Re: In a vector: How to locate a certain element; then erase just that element

4-Dec-07 7:33

Larry Mills Sr wrote:
What about erase?

if (i != m_vTlr.end())
{	
    // Found it!
    m_vTlr.erase(i, i); // the second argument may be i + 1
}

Larry Mills Sr wrote:
When I find the element in the vector I want to erase it from the vector WITHOUT leaving a blank spot in the vector.

Have you considered a list?

Larry Mills Sr4-Dec-07 11:37

Re: In a vector: How to locate a certain element; then erase just that element

4-Dec-07 11:37

No I haven't. I was told a vector would be the right choice for my database. I know even less about a "list". I just know I don't want to use any of MFC's containers!
A C++ programming language novice, but striving to learn

Nelek4-Dec-07 21:28

Nelek

4-Dec-07 21:28

You can use the CList in Simon Huges and my own article, just to see how it works (key word to search: Smart list)

But you can anyways use a list in C++ without MFC, the principies should be similar. I dont now remember if it is in the STL, stl::list

Greetings.

--------
M.D.V. Wink | ;)

Re: In a vector: How to locate a certain element; then erase just that element

Larry Mills Sr5-Dec-07 3:24