C / C++ / MFC

Open and write in XML-Document

28-Feb-06 8:10

zahid_ash wrote:
Will they run parallely on multi processor machine.

Yes, but I've no experience with this. I think SetThreadIdealProcessor() will be required.

zahid_ash wrote:
How can i demise the context switching of thread,

I'm not sure exactly what it is that you are asking here, but I think the answer is, "When more than one thread is involved, the processosr will need to periodically switch between them so that at any given monent, only one thread is actually active." This obviously incurs overhead that cannot be avoided.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

hanno2528-Feb-06 5:16

hanno25

28-Feb-06 5:16

Hi!

DOes anybody know, what I have to do, if I want either to create an new .XML-File or open an existing .XML-File to write at the beginning of this file?
I thought, that I can handle this like a normal text-file but that has been a mistake.
So, if anybody knows something about this, please let me know!

Thanks, Hanno

David Crow28-Feb-06 5:29

28-Feb-06 5:29

Use IXMLDocument or DOMDocument.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

hanno2528-Feb-06 5:43

hanno25

28-Feb-06 5:43

Thanks for your help. Could you send a small piece of code, explaning this a little bit?
With best regards, Hanno

David Crow28-Feb-06 5:46

28-Feb-06 5:46

Why not just Google for those two interfaces? Also try CodeProject articles, and MSDN.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

finishing writing symbol to stdin?

Dominik Reichl28-Feb-06 6:21

Dominik Reichl

28-Feb-06 6:21

If you want a light-weight XML library (i.e. not MSXML), have a look at http://tinyxml.sourceforge.net/[^].

I used TinyXML in several projects, it works pretty well.

Best regards
Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

9ine28-Feb-06 4:51

28-Feb-06 4:51

Whats the symbol to put to stdin to finish its reading

//console app reading in a loop until that magic symbol
while(res)
res = fscanf(stdin,"%s",&str);

//while pressing in console
string1
string2
string3
??? how to quit it

9ine

David Crow28-Feb-06 4:53

28-Feb-06 4:53

Use F6 or Ctrl-Z.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

9ine28-Feb-06 5:11

28-Feb-06 5:11

whats the code for that combination ctrl-z? \r \n \t ... ?

9ine

David Crow28-Feb-06 5:22

28-Feb-06 5:22

If you are typing at a command prompt (which is what I inferred from your "while pressing in console" comment), \r \n \t are meaningless. What exactly are you trying to do?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

9ine28-Feb-06 5:34

28-Feb-06 5:34

I'm not going to type numbers and then pressing F6, I need to write to console application stdin so it will read it like fscanf(stdin, ... ) or whatever the method until that character F6 encountered

9ine

David Crow28-Feb-06 5:48

28-Feb-06 5:48

Ok, let me see if I can put the pieces together. You have a Windows application that is going to spawn a console application. Right so far? The console applicaton is going to be reading from stdin, so you need to populate that stream from within the Windows application. Correct?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

9ine28-Feb-06 5:56

28-Feb-06 5:56

Exactly! and send that stream of floating numbers prepared as char strings array of course to console input so it will be reading it until F6 encountered.

9ine

David Crow28-Feb-06 6:08

28-Feb-06 6:08

See these two articles:

http://support.microsoft.com/default.aspx?scid=kb;en-us;190351[^]

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/creating_a_child_process_with_redirected_input_and_output.asp[^]

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

PJ Arends28-Feb-06 7:38

PJ Arends

28-Feb-06 7:38

CTRL Z is ASCII 26, you can enter it in your text literals using the octal notation \032

You may be right
I may be crazy
But it just may be a lunatic you’re looking for
-- Billy Joel --

Within you lies the power for good - Use it!

onSize of CDialog

ns28-Feb-06 4:48

28-Feb-06 4:48

Isn't the onSize() event supposed to fire when you resize a CDialog?

void CDlgMap0::OnSize(UINT nType, int cx, int cy) 
{
	MakePE();
	CDialog::OnSize(nType, cx, cy);
}

In my case the execution never steps into the function.

I have in the .h file, where I added it by hand

protected:

	// Generated message map functions
	//{{AFX_MSG(CDlgMap0)
		// NOTE: the ClassWizard will add member functions here
		afx_msg void OnSize(UINT nType, int cx, int cy);

	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()

thanks,
sb

Re: onSize of CDialog

David Crow28-Feb-06 4:52

CEdit question (should be easy)

28-Feb-06 4:52

ns wrote:

In my case the execution never steps into the function.

How do you know?

What does CDlgMap0's BEGIN_MESSAGE_MAP() method look like?

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: onSize of CDialog

ns28-Feb-06 5:01

28-Feb-06 5:01

The begin_mesage_map was empty. I've been away from MFC for 2 years (been using QT) . I see now I needed ON_WM_SIZE() in there. Thanks so much for the hint. It works now.
sb

RobJones28-Feb-06 4:22

28-Feb-06 4:22

Hey,
I have no idea why this isn't working but I am trying to simply toggle between ES_PASSWORD on a edit control with in a dialog. I have tried Get/SetWindowLong and ModifyStyle and neither seem to work... Here is a sniplet of my code.

What am I doing wrong?

void CActivationDlg::OnBnClickedCMask()
{
	UpdateData(TRUE);

	m_bMask = m_bMask ? TRUE : FALSE;

	DWORD dwStyle = GetWindowLong(m_cKey.GetSafeHwnd(), GWL_STYLE);

	if(!m_bMask) // Remove password mask
	{
		TRACE("Remove PW mask\n");
		
		dwStyle &= ~ES_PASSWORD;
		SetWindowLong(m_cKey.GetSafeHwnd(),
						GWL_STYLE,
						dwStyle);
	}
	else		// Add password mask
	{
		TRACE("Add PW mask\n");

		dwStyle |= ES_PASSWORD;
		SetWindowLong(m_cKey.GetSafeHwnd(),
						GWL_STYLE,
						dwStyle);
	}

	m_cKey.Invalidate();
	
	UpdateData(FALSE);
}

Thanks in advance!
Rob

Whoever said nothing's impossible never tried slamming a revolving door!

David Crow28-Feb-06 4:43

28-Feb-06 4:43

Are you sure the ES_PASSWORD style can be un/set at runtime? Some styles are unchangeable.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

RobJones28-Feb-06 4:49

28-Feb-06 4:49

You might be right... I did notice on MSDN that some of the other styles state if changes need to be made after creation use the SetWindowLong function, unfortunately it doesn't say anything about ES_PASSWORD, it probably can't be changed with ease...

DOH!

Thanks,

Rob

Whoever said nothing's impossible never tried slamming a revolving door!

David Crow28-Feb-06 4:50

28-Feb-06 4:50

Would it be feasible to create two of the same controls, one with the style and one without? Then at runtime you could just show/hide the appropriate control.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

RobJones28-Feb-06 6:37

28-Feb-06 6:37

Yeah I could have just done that... Instead I have removed the old control and created a new one. If anyone is interested this is the code. Most of this code is from the SuperPad MSDN example for changing word wrap...

void CActivationDlg::OnBnClickedCMask()
{
	UpdateData(TRUE);

	m_bMask = m_bMask ? TRUE : FALSE;

	// preserve original control's state.
	CFont* pFont = m_cKey.GetFont();
	int nLen = m_strKey.GetLength();
	TCHAR* pSaveText = new TCHAR[m_strKey.GetLength()+1];
	GetWindowText(pSaveText, nLen+1);

	DWORD dwStyle = GetWindowLong(m_cKey.GetSafeHwnd(), GWL_STYLE);

	if(!m_bMask) // Remove password mask
		dwStyle &= ~ES_PASSWORD;
	else		// Add password mask
        dwStyle |= ES_PASSWORD;

	// create new edit control with appropriate style and size.
	CActivationDlg* pParent = (CActivationDlg*)m_cKey.GetParent();
	
	CRect rect;
	m_cKey.GetWindowRect(rect);
	pParent->ScreenToClient(rect);

	UINT nID = m_cKey.GetDlgCtrlID();

	HWND hWnd = ::CreateWindowEx(WS_EX_CLIENTEDGE, _T("edit"), NULL, dwStyle,
		rect.left, rect.top, rect.right-rect.left, rect.bottom-rect.top,
		pParent->m_hWnd, (HMENU)nID, AfxGetInstanceHandle(), NULL);

	if (hWnd == NULL)
	{
		delete[] pSaveText;
		return;
	}

	// set the window text to nothing to make sure following set doesn't fail
	m_cKey.SetWindowText(NULL);

	// restore visual state
	::SetWindowText(hWnd, pSaveText);
	delete[] pSaveText;
	if (pFont != NULL)
	{
		ASSERT(pFont->m_hObject != NULL);
		::SendMessage(hWnd, WM_SETFONT, (WPARAM)pFont->m_hObject, 0);
	}

	// detach old window, attach new
	SetDlgCtrlID(nID+1);
	HWND hWndOld = m_cKey.Detach();
	::SetWindowLong(hWndOld, GWL_WNDPROC, (LONG)*GetSuperWndProcAddr());
	ASSERT(m_cKey.m_hWnd == NULL);
	m_cKey.SubclassWindow(hWnd);
	ASSERT(m_cKey.m_hWnd == hWnd);

	UINT nTabStops = 7;
	m_cKey.SetTabStops(nTabStops);

	m_cKey.GetClientRect(&rect);
	m_cKey.SetWindowPos(NULL, 0, 0, 0, 0,
		SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE|SWP_NOZORDER|SWP_SHOWWINDOW);
	
	m_cKey.UpdateWindow();

	// destroy old
	::SetWindowPos(hWndOld, NULL, 0, 0, 0, 0,
		SWP_HIDEWINDOW|SWP_NOREDRAW|SWP_NOMOVE|SWP_NOSIZE|SWP_NOACTIVATE|
		SWP_NOZORDER);
	::DestroyWindow(hWndOld);

	UpdateData(FALSE);
}

Whoever said nothing's impossible never tried slamming a revolving door!

-- modified at 6:45 Wednesday 1st March, 2006g door!

Dan McCormick28-Feb-06 16:28

Dan McCormick

28-Feb-06 16:28

<rant>
ES_PASSWORD - totally useless, don't know why it exists.
</rant>

I had this same problem until I found (after much digging) the easy way. Check out: CEdit::SetPasswordChar[^]

From the documentation:

Parameters

ch

Specifies the character to be displayed in place of the character typed by the user. If ch is 0, the actual characters typed by the user are displayed.

Apparently if an Edit control has ES_PASSWORD set when it is created (or subclassed or... lordy, who knows exactly when), MFC calls SetPasswordChar() with a value of '*'. ES_PASSWORD does not seem to be a true window style attribute, but can the documentation point that out in an obvious manner? Nooooo! Mad | :mad:

Anyway, see if that won't give you a cleaner solution. It's working well for us in our shop.

Just remember... Offer void where prohibited. Your mileage may vary.

Later,
Dan

Remember kids, we're trained professionals.
Don't try this at home!

RobJones1-Mar-06 0:45