|
Is there any difference between
auto_ptr<<foo>> p;
...
p = auto_ptr<<foo>>(new foo);
and
auto_ptr<<foo>> p;
...
p = new foo;
I saw the first form in examples and wondered why it was being used.
There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal
|
|
|
|
|
sashoalm wrote: p = new foo;
are you sure. that you'd able to do this? I think compiler will throw error.
You've to be careful about auto_ptrs unusual characteristic. Copying them them to null, and the copying pointer assumes sole ownership of the resource
See the example demonstrate this issue from Effective C++ 3rd Ed.
std::auto_ptr<Investment>
pInv1(createInvestment());
std::auto_ptr<Investment> pInv2(pInv1);
pInv1 = pInv2;
// object, and pInv2 is null
-Sarath.
"Great hopes make everything great possible" - Benjamin Franklin
|
|
|
|
|
Thanks for the reply.
There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal
|
|
|
|
|
Hi,
Can u pls suggest me any book to start with for MFC in VS2003 and even im new to vc++..
|
|
|
|
|
Hi,
Programming Windows with MFC[^] is a great book, written by Jeff Prosise.
Legend says that one starts with Programming Windows with C++ and work your way up through frameworks and libraries. If you'd like to pursue that path, you could start with Programming Windows[^] by Charles Petzold.
Of course, you would be expected to be able to do C/C++ programming well before you touch any of these.
Happy learning. 
It is a crappy thing, but it's life -^ Carlo Pallini
|
|
|
|
|
I learnt from an earlier version of this one[^].
Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p
|
|
|
|
|
The name (Programming with Microsoft Visual C++ .NET) of this version looks like it would explain managed stuff too.
I'm not against managed code, but I don't like the idea of mixing up managed code with good old native C++. It's like eating garlic with ice cream.
It is a crappy thing, but it's life -^ Carlo Pallini
|
|
|
|
|
Good one!
Welcome again int CP's Memorable Quotes list [^] (what a day! Yours is the second entry, so far...).
BTW:Rajesh R Subramanian wrote: Of course, you would be expected to be able to do C/C++ programming well before you touch any of these.
is a great one too...
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]
|
|
|
|
|
I ain't sure if I can keep up to the heat. 
It is a crappy thing, but it's life -^ Carlo Pallini
|
|
|
|
|
That was actually the name of the product - remember it used to be Visual Studio .NET rather than just plain Visual Studio? 5 out of the 35 chapters cover .NET - the rest are plain Visual C++ and MFC (I know because it's on Safari & I can see it ).
Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p
|
|
|
|
|
Yes, that was very much what I was talking about. They can please publish another book to explain all the C++/CLI stuff instead of dedicating 5 chapters to show how .NET "fits in". But I see this is happening with a lot of books these days.
I can't wait for X86 .NET.
It is a crappy thing, but it's life -^ Carlo Pallini
|
|
|
|
|
How do give ( pass, transmit) value of variable
m_sPP_modal
From class modal window “CAdodc_MDI”
To variable
m_sPP_modeless
of modeless class “CMyModeless2”
and on the contrary - from class “CMyModeless2”
to class modal window “CAdodc_MDI ?
below 2 lines isn’t correctly into button ‘OK’ of modal window:
CMyModeless2 dlg2;
dlg2.m_sPP_modeless = L“text”;
below brief:
/////////////////////////////////////////
// Adodc_MDI.cpp : implementation file
#include "stdafx.h"
#include "ADO_MDI.h"
#include "Adodc_MDI.h"
#include "MyModeless2.h"
class CAdodc_MDI : public CDialog
{
CString m_sPP_modal = _T("text in Modal window");
}
//////////////////////////////////////
MyModeless2.cpp : implementation file
#define WM_GOODBYE WM_USER + 100
class CMyModeless2 : public CDialog
{
CString m_sPP_modeless = _T("text in Modeless window");
}
//////////////////////////////////////
// ADO_MDIView.cpp : implementation of the CADO_MDIView class
//
#include "stdafx.h"
#include "ADO_MDI.h"
#include "ADO_MDIDoc.h"
#include "CntrItem.h"
#include "ADO_MDIView.h"
#include "MyModeless2.h"
#include "Adodc_MDI.h"
LRESULT CADO_MDIView::OnGoodbye(WPARAM wParam, LPARAM lParam)
{ }
void CADO_MDIView::OnLButtonDown(UINT nFlags, CPoint point)
{ }
void CADO_MDIView::OnRButtonDown(UINT nFlags, CPoint point)
{ }
///////////////////////////////////////////////
///////////////////////////////////////////////
Below MORE DETAIL:
"MyModeless2.h"
#pragma once
#include "afxwin.h"
// CMyModeless2 dialog
#define WM_GOODBYE WM_USER + 100
class CMyModeless2 : public CDialog
{
DECLARE_DYNAMIC(CMyModeless2)
public:
CMyModeless2(CWnd* pParent = NULL); // standard constructor
virtual ~CMyModeless2();
// Dialog Data
enum { IDD = IDD_DIALOG4 };
CString m_sPP_modeless;
CView* m_pView;
CMyModeless2(CView* pView);
afx_msg void OnBnClickedButton3();
BOOL Create(void);
protected:
virtual void OnOK();
virtual void OnCancel();
public:
afx_msg void OnBnClickedOk();
afx_msg void OnBnClickedCancel();
};
/////////////////////////////////////
MyModeless2.cpp
#include "stdafx.h"
#include "ADO_MDI.h"
#include "MyModeless2.h"
// CMyModeless2 dialog
IMPLEMENT_DYNAMIC(CMyModeless2, CDialog)
CMyModeless2::CMyModeless2(CWnd* pParent /*=NULL*/)
: CDialog(CMyModeless2::IDD, pParent)
, m_sPP_modeless(_T(""))
void CMyModeless2::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
DDX_Text(pDX, IDC_EDIT3, m_sPP_modeless);
}
BEGIN_MESSAGE_MAP(CMyModeless2, CDialog)
ON_BN_CLICKED(IDC_BUTTON1, &CMyModeless2::OnBnClickedButton1)
ON_BN_CLICKED(IDC_BUTTON2, &CMyModeless2::OnBnClickedButton2)
ON_BN_CLICKED(IDC_BUTTON3, &CMyModeless2::OnBnClickedButton3)
ON_BN_CLICKED(IDOK, &CMyModeless2::OnBnClickedOk)
ON_BN_CLICKED(IDCANCEL, &CMyModeless2::OnBnClickedCancel)
END_MESSAGE_MAP()
CMyModeless2::CMyModeless2(CView* pView)
{
m_pView = pView;
}
BOOL CMyModeless2::Create(void)
{
return CDialog::Create(CMyModeless2::IDD);
}
void CMyModeless2::OnOK()
{
if (m_pView != NULL) {
m_pView->PostMessage(WM_GOODBYE, IDOK);
}
else {
CDialog::OnOK(); // modal case
}
CDialog::OnOK();
}
void CMyModeless2::OnCancel()
{
if (m_pView != NULL) {
// modeless case -- do not call base class OnCancel
m_pView->PostMessage(WM_GOODBYE, IDCANCEL);
}
else {
CDialog::OnCancel(); // modal case
}
}
void CMyModeless2::OnBnClickedOk()
{
OnOK();
}
void CMyModeless2::OnBnClickedCancel()
{
OnCancel();
}
///////////////////////////////////////////
ADO_MDIView.h
// ADO_MDIView.h : interface of the CADO_MDIView class
#pragma once
class CMyModeless2;
class CADO_MDIView : public CScrollView
{
protected: // create from serialization only
CADO_MDIView();
DECLARE_DYNCREATE(CADO_MDIView)
// Attributes
public:
CADO_MDIDoc* GetDocument() const;
// Overrides
public:
virtual void OnDraw(CDC* pDC); // overridden to draw this view
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
protected:
virtual void OnInitialUpdate(); // called first time after construct
// Implementation
public:
virtual ~CADO_MDIView();
protected:
// Generated message map functions
protected:
afx_msg void OnDestroy();
DECLARE_MESSAGE_MAP()
public:
CMyModeless2* m_pModeless;
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
LRESULT OnGoodbye(WPARAM wParam, LPARAM lParam);
};
//////////////////////////////////////////////
// ADO_MDIView.cpp : implementation of the CADO_MDIView class
#include "stdafx.h"
#include "ADO_MDI.h"
#include "ADO_MDIDoc.h"
#include "CntrItem.h"
#include "ADO_MDIView.h"
#include "MyModeless2.h"
#include "Adodc_MDI.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#endif
// CADO_MDIView
IMPLEMENT_DYNCREATE(CADO_MDIView, CScrollView)
BEGIN_MESSAGE_MAP(CADO_MDIView, CScrollView)
ON_MESSAGE(WM_GOODBYE, OnGoodbye)
ON_WM_DESTROY()
ON_WM_LBUTTONDOWN()
ON_WM_RBUTTONDOWN()
END_MESSAGE_MAP()
// CADO_MDIView construction/destruction
CADO_MDIView::CADO_MDIView()
: m_pModeless(NULL)
, m_sReceivingFromModeless1(_T(""))
{
m_pModeless = new CMyModeless2(this);
}
CADO_MDIView::~CADO_MDIView()
{
delete m_pModeless;
}
void CADO_MDIView::OnDestroy()
{
// Deactivate the item on destruction; this is important
// when a splitter view is being used
COleClientItem* pActiveItem = GetDocument()->GetInPlaceActiveItem(this);
if (pActiveItem != NULL && pActiveItem->GetActiveView() == this)
{
pActiveItem->Deactivate();
ASSERT(GetDocument()->GetInPlaceActiveItem(this) == NULL);
}
CScrollView::OnDestroy();
}
void CADO_MDIView::OnLButtonDown(UINT nFlags, CPoint point)
{
if (m_pModeless->GetSafeHwnd() == 0)
{
m_pModeless->Create();
}
}
void CADO_MDIView::OnRButtonDown(UINT nFlags, CPoint point)
{
m_pModeless ->DestroyWindow();
}
LRESULT CADO_MDIView::OnGoodbye(WPARAM wParam, LPARAM lParam)
{
m_pModeless->m_sPP_modeless;
m_pModeless->DestroyWindow();
return 0L;
}
/////////////////////////////////////////////
Adodc_MDI.h
#pragma once
#include "afxcmn.h"
class CAdodc_MDI : public CDialog
{
DECLARE_DYNAMIC(CAdodc_MDI)
public:
CAdodc_MDI(CWnd* pParent = NULL); // standard constructor
virtual ~CAdodc_MDI();
enum { IDD = IDD_ADODC };
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
DECLARE_MESSAGE_MAP()
public:
virtual BOOL OnInitDialog();
CListCtrl* m_pListCtrl;
_ConnectionPtr m_pConn2;
CString m_sPP;
afx_msg void OnHdnItemclickList1(NMHDR *pNMHDR, LRESULT *pResult);
afx_msg void OnNMClickList1(NMHDR *pNMHDR, LRESULT *pResult);
afx_msg void OnBnClickedOk();
int col;
int row;
private:
};
////////////////////////////////////////
|
|
|
|
|
Please read the posting guidelines. I don't think anybody will want to read all your source code.
As far as I understood, you want to pass a variable from one dialog to another one. Is that correct ? If yes, then take a look at this article[^]
|
|
|
|
|
See, for instance, this article [^].
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]
|
|
|
|
|
You could pass the value in the constructor:
CMyModeless2::CMyModeless2(CView* pView, CString sPP)
{
m_sPP_modeless = sPP;
m_pView = pView;
}
|
|
|
|
|
I am in the middle of porting one of my C++ project which is using old iostream (shipped with VC6.0) into new iostream implemented in stlport version 5.2
I found that some of the stream related methods are not available in the new iostream class.
The compiler gives me error for the following methods
streambuf::allocate()
streambuf::doallocate()
streambuf::blen()
ostream::osfx()
ostream::opfx()
streambuf::base()
streambuf::ebuf()
streambuf::setb()
Am I missing something?
Are there any equivalent methods available in new iostream library?
How can I substitute these functions when I port into new stlport/VS2008 iostream?
Thanks in advance
cheers
Varghese Paul
|
|
|
|
|
Varghese Paul M wrote: streambuf::allocate()
streambuf::doallocate()
streambuf::blen()
streambuf::base()
streambuf::ebuf()
streambuf::setb()
These all refer to the 'reserve area' of the pre-standard IOStreams streambuf. The standard basic_streambuf doesn't have this concept at all (I guess they decided it was better for that concept not to exist in an abstract stream buffer). This post[^], however, gives a suggestion for a possible solution.
Varghese Paul M wrote: ostream::osfx()
ostream::opfx()
These were functions that ran before (opfx) and after (osfx) every output operation. They've been replaced by the sentry nested class, so rather than this:
if (os.opfx()) { os.do_something(); }
os.osfx();
you have this
std::ostream::sentry se(os);
if (se) { os.do_something(); }
Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p
|
|
|
|
|
Hi all,
i m working on Windows based mobile,here ActiveSync or Mobile device center is necessary.
How can i check ActiveSync or Mobile device centre installed on PC?
please help me for this.
thanks in advance.
To accomplish great things, we must not only act, but also dream;
not only plan, but also believe.
|
|
|
|
|
I needing program for fax modem. please guide for me. thanks very much
|
|
|
|
|
Would you like cheese with that?
It is a crappy thing, but it's life -^ Carlo Pallini
|
|
|
|
|
May I ask for pizza & beer, sir? Plz, plz, urgentz...
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]
|
|
|
|
|
i need code process for this problem
|
|
|
|
|
Well I badly need a new car!
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]
|
|
|
|
|
nguyen phan wrote: i need code process for this problem
This place is not a wishing well.
Please read the guidelines[^] before you can post further queries here.
It is a crappy thing, but it's life -^ Carlo Pallini
|
|
|
|
|
Try TAPI.
"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
