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first, a polite criticism: nobody is ever going to look at that much code.
anyway, unless you are writing a COM server DLL, you don't need to use RegSvr32 to "register" it.
specifically, RegSvr32 loads your DLL and tried to call a function called "RegisterServer" in your DLL; RegisterServer usually sets up a bunch of registry stuff that lets COM know what your DLL does. but, if you're not writing a COM server DLL, there's no need to have a RegisterServer function and no need to use RegSvr32.
-c
Software | Cleek
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Hi ! Here is my software.
I have a main worker thread which is the Test Plan.
This worker thread create other sub-worker threads as Test Case. Everything work fine but I have problems with the refresh of my view. My threads (almost all the software) is part of a document (I use doc-view architecture of MFC).
I use icones to show if the test succeed or fail and also other pictograms.
Anyway, I WANT TO REFRESH MY SCREEN WITH UpdateAllViews() which call in some way the OnDraw function).
I have ASSERT fail because it is likely that I have passed a C++ object from one thread to another. I don't really understand the explanation associated in the Wincore.CPP file.
How I can refresh my screen (anytime, when I want) without having problem in a Multithread software ???
Thank you !
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One way is to use PostMessage(...).
UINT MyThread(LPVOID pParam)
{
CMyView *pView = (CMyView *)pParam;
pView->PostMessage(WM_MY_UPDATE_MESSAGE, wParam, lParam);
}
...
...
...
ON_MESSAGE(WM_MY_UPDATE_MESSAGE, OnMyUpdateMessage)
...
...
...
LRESULT CMyView::OnMyUpdateMessage(WPARAM wParam, LPARAM lParam)
{
UpdateAllViews();
}
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Hi,
I was using this code to read from text log files, and it all worked fine:
<br />
CFile log_file;<br />
CString log_line;<br />
log_file.Open(_T("file"),CFile::modeRead|CFile::shareDenyNone);<br />
CArchive ar (&log_file,CArchive::load);<br />
<br />
while (ar.ReadString (log_line))<br />
{<br />
}<br />
<br />
ar.Close<br />
file.Close<br />
What happens now, is that I use the same code,but within a thread, and from some reason, if I leave my application open (even when I am done reading the file), other applications can't delete the log files unless I close my app....
Any idea ?
Shay
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Check the thread. Does it every exit the loop?
Kuphryn
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yes it does, it even closes the file.
The thread posts a message to the GUI that it's done and it all works fine...
Any more ideas ?
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Hi,
I'm still new at all this, and have run into a bit of a problem when trying to print. My app contains a split window with a CView derived class on the left and a formview dialog with some controls on the right.
I'm trying to print the CView text. This works when i click on the left frame, and then go to my menubar -> file -> print.
However when the right frame control dialog has focus, I can't get it to print. I catch ID_FILE_PRINT in Mainfrm.cpp(onfileprint), then do a SendMessage(ID_FILE_PRINT) to the view window. but nothing happens.
Could someone explain what the difference is between using the file->print in the menu when the cview has focus, and sending it a ID_FILE_PRINT message?
thanks a million,
 Mike
"I bet Einstein turned himself all sorts of colors before he invented the light bulb." -- Homer J.
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See TN021[^] and TN022[^]
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04
Within you lies the power for good - Use it!
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 Ok I have just inherited a piece of C++ .NET code( i feel like a proud PAPA ).
This C++ .NET code in the form of assemblies that interface with another set of C# assemblies which are being called from a ASP.NET project. The problem is that when the ASP .NET project is executed..i can just see the resources on this process going from 72,000K to almost 154,000K in a hurry and progressively getting "worst".
So, my first thought is memory leak in the C++ assemblies. Here are the questions.
1. Can i use #define CRTDBG_MAP_ALLOC to debug memory leaks in dll's.
2. Technically according to MS I should put
_CrtSetDbgFlag ( _CRTDBG_ALLOC_MEM_DF | _CRTDBG_LEAK_CHECK_DF );
at the start of my program.
So, since it is a just a class library..where would the _CrtSetDbgFlag go.
thanks
Sameer
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If it is possible the best approach to developing components is to isolate them so that as much functionality as possible can be executed from a native environment. In this case that would be VC.NET C++ WinForms application.
In fact that is the method I have always used to develop components in C++. I use a desktop application project to develop all the main C++ classes that will be used in the components. Then you create a second project, COM, .NET Assembly, whatever and add the classes to it and wrap them in the desired interface(s). That way you can always go back to the developement project and execute the C++ code in isolation for testing things like memory leaks.
But, that's just my opinion... I could be wrong.
"No matter where you go, there your are." - Buckaroo Banzai
-pete
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// D.cpp: Singleton returning pointer to polymorphic class
//
// [Q] How to change definitions of derived classes to disallow
// direct construction of derived objects?
// ie CDerived1 D1 or CDerived2* D2 = new CDerived2 should not
// possible!
//
#include "stdafx.h"
#include <iostream>
#include <memory>
#include <cassert>
using namespace std;
///////////////////////////////////////////////////////////////////////////////
static int Type(0);
/////////////////////////////////////////////////////////////////// forwards //
class CBase;
class CDerived1;
class CDerived2;
///////////////////////////////////////////////////////////////////////////////
class CBase
{
public:
static CBase* GetInstance();
virtual ~CBase();
virtual ostream& Print(ostream& os) const;
protected:
CBase();
CBase(const CBase&); // not implemented
CBase& operator=(const CBase&); // not implemented
private:
static auto_ptr<cbase> Instance_; // will auto destroy
};
///////////////////////////////////////////////////////////////////////////////
class CDerived1 : public CBase
{
public:
virtual ~CDerived1();
ostream& Print(ostream& os) const;
public: // but should be protected to disallow direct creation
CDerived1();
CDerived1(const CDerived1&); // not implemented
CDerived1& operator=(const CDerived1&); // not implemented
};
///////////////////////////////////////////////////////////////////////////////
class CDerived2 : public CBase
{
public:
virtual ~CDerived2();
ostream& Print(ostream& os) const;
public: // but should be protected to disallow direct creation
CDerived2();
CDerived2(const CDerived2&); // not implemented
CDerived2& operator=(const CDerived2&); // not implemented
};
///////////////////////////////////////////////////////////////////////////////
ostream& operator<<(ostream& os, const CBase& rhs)
{ return rhs.Print(os); };
ostream& operator<<(ostream& os, const CDerived1& rhs)
{ return rhs.Print(os); };
ostream& operator<<(ostream& os, const CDerived2& rhs)
{ return rhs.Print(os); };
///////////////////////////////////////////////////////////////////////////////
auto_ptr<cbase> CBase::Instance_;
CBase::CBase()
{ cout << "Base: ctor\n"; }
CBase::~CBase()
{ cout << "Base: dtor\n"; }
CBase* CBase::GetInstance()
{
// as coded is not thread-safe! required double-check/lock
//
if (Instance_.get() == NULL)
{
switch (Type)
{
case 1:
Instance_.reset(new CDerived1);
break;
case 2:
Instance_.reset(new CDerived2);
break;
default:
assert(0);
break;
}
}
return Instance_.get();
}
ostream& CBase::Print(ostream& os) const
{
return os<< "CBase::Print Address=0x" << hex << (Instance_.get()) << dec;
};
///////////////////////////////////////////////////////////////////////////////
CDerived1::CDerived1()
: CBase()
{ cout << "CDerived1: ctor\n"; }
CDerived1::~CDerived1()
{ cout << "CDerived1: dtor\n"; }
ostream& CDerived1::Print(ostream& os) const
{ CBase::Print(os); os << "\nCDerived1::Print"; return os; }
///////////////////////////////////////////////////////////////////////////////
CDerived2::CDerived2()
: CBase()
{ cout << "CDerived2: ctor\n"; }
CDerived2::~CDerived2()
{ cout << "CDerived2: dtor\n"; }
ostream& CDerived2::Print(ostream& os) const
{ CBase::Print(os); return os << "\nCDerived2::Print"; };
///////////////////////////////////////////////////////////////////////////////
int main(int, char**)
{
::Type = 2;
CBase* B2 = CBase::GetInstance(); // get a CDerived2
cout << *B2 << endl << endl;
CDerived1 D1; // should not be allowed
cout << D1 << endl << endl;
CDerived2* D2 = new CDerived2; // should not be allowed
cout << *D2 << endl << endl;
delete D2;
return 0;
}
///////////////////////////////////////////////////////////////////////////////
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There is a reason that Singleton is a Software Design Pattern 
"No matter where you go, there your are." - Buckaroo Banzai
-pete
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I appreciate your taking the time to look at this question but your "answer" is less than helpful. The singleton pattern is implemented correctly; I've even implemented the auto_ptr to destroy on exit and noted the need for thread-safety (not required in this simple testbed). I've reread the GoF section on singletons and search >100 sites, lots of info on regular classes but nothing on polymorphic classes. The GoF site shows a polymorphic use but the ctor is public in all the dervied classes, so, they could be directly instantiated.
So, again, how to ensure derived classes are not implemented directly.
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kylur wrote:
your "answer" is less than helpful
Yes that is correct. I did not understand the point or goal of your design and actually still don't. Perhaps Mr. Binns solution is what you were looking for.
Good luck
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Make the derived constructors private (or protected), and add "friend CBase;" to your derived class definition.
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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Much appreciated... exactly what I needed.
Thank you,
Kylur.
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I want to check if a file path I have is valid and refers to a file before actually going ahead and opening it. Is there a quick and easy way using MFC, the Platform SDK, or the runtime library to check this?
Joel Holdsworth
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Just open the file. Given that you're using a multitasking operating system, there's always a chance that the file could be deleted, renamed, moved, whatever between the time that you check, and the time that you open it.
If you really insist on doing it this way, you could try using FindFirstFile/FindNextFile.
Edit: MFC has the CFileFind class, which wraps these APIs.
Stability. What an interesting concept. -- Chris Maunder
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try{
//try opening the file here
catch(someexception){
//the file path is not valid...
}
this way if the filepath does exist you don't have to do that extra step.
Good luck.
"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix
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<br />
CFile f;<br />
CFileStatus fs;<br />
<br />
if(f.GetStatus(lpszFileName, fs))<br />
{<br />
}<br />
else<br />
Arjan
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GetFileAttributes(path) != (DWORD)-1
But this makes sense only if you can drop additional code between the check and the file open request
we are here to help each other get through this thing, whatever it is Vonnegut jr.
sighist || Agile Programming | doxygen
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_access() is one of several ways.
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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I think opening the file with fopen() or CFile() would be easy and fast. I use that function too:
BOOL FileExists(LPCTSTR lpFileName)
{<br />
DWORD dwFileAttr = GetFileAttributes(lpFileName);<br />
<br />
if ((dwFileAttr != 0xFFFFFFFF) &&<br />
!(dwFileAttr & FILE_ATTRIBUTE_DIRECTORY))<br />
return TRUE;<br />
else<br />
return FALSE;<br />
}
I think that should be enough solutions for that problem. 
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Joel Holdsworth wrote:
I want to check if a file path I have is valid and refers to a file before actually going ahead and opening it. Is there a quick and easy way using MFC, the Platform SDK, or the runtime library to check this?
there is api called PathFileExist(),try that
-----------------------------
"I Think It will Work"
Formerly Known As "Alok The Programmer" at CP
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk
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