Re: Number property(Use only digits) of EditBox. - C / C++ / MFC Discussion Boards

Re: Number property(Use only digits) of EditBox.

Le@rner29-Jun-08 19:44

Le@rner

29-Jun-08 19:44

Can you please tell me with example.

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Re: Number property(Use only digits) of EditBox.

MANISH RASTOGI29-Jun-08 20:35

MANISH RASTOGI

29-Jun-08 20:35

void CNumericEdit::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
char szBuffer[100] = {0};
short int nCounter = 0;
short int iTemp = 0;
int iStartChar = 0;
int iEndChar = 0;

if(nChar == '-')
{
return;
}

if(nChar != VK_BACK && nChar != VK_TAB)
{
if(nChar != '.' && (nChar < '0' || nChar > '9'))
{
return;
}

GetWindowText(szBuffer, sizeof(szBuffer));

if(nChar == '.')
{
GetSel(iStartChar, iEndChar);

if(iStartChar != 0 || iEndChar != static_cast<int>(strlen(szBuffer)))
{
for(nCounter = 0; szBuffer[nCounter] != NULL; nCounter++)
{
if(szBuffer[nCounter] == '.')
{
return;
}
}
}
}
}

CEdit::OnChar(nChar, nRepCnt, nFlags);
}

Re: Number property(Use only digits) of EditBox.

Le@rner29-Jun-08 20:44

Le@rner

29-Jun-08 20:44

this error comes out when i use the above code.

error C2248: 'CWnd::OnChar' : cannot access protected member declared in class 'CWnd'
1> C:\Program Files\Microsoft Visual Studio 8\VC\atlmfc\include\afxwin.h(2631) : see declaration of 'CWnd::OnChar'
1> C:\Program Files\Microsoft Visual Studio 8\VC\atlmfc\include\afxwin.h(1967) : see declaration of 'CWnd'
1>

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Re: Number property(Use only digits) of EditBox.

MANISH RASTOGI30-Jun-08 2:08

MANISH RASTOGI

30-Jun-08 2:08

Subclass CEdit.

Re: Number property(Use only digits) of EditBox.

Le@rner30-Jun-08 2:12

Le@rner

30-Jun-08 2:12

How can i do this?

I m using edit box and other controls on Dialog box,so the base class is CDialog.

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Re: Number property(Use only digits) of EditBox.

MANISH RASTOGI30-Jun-08 2:24

MANISH RASTOGI

30-Jun-08 2:24

Derive a new class from CEdit and override OnChar.
In dialog create a member variable of new Class derived from CEdit.
In DoDataExchange of dialog write
DDX_Control(pDX, <edit control="" id="">, <object of="" derived="" cedit="" class="">);

If you still do not get please see articals which is available in codeproject.

Re: Number property(Use only digits) of EditBox.

Le@rner30-Jun-08 19:38

Le@rner

30-Jun-08 19:38

Thanks.

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Re: Number property(Use only digits) of EditBox.

Iain Clarke, Warrior Programmer30-Jun-08 2:13

Iain Clarke, Warrior Programmer

30-Jun-08 2:13

In addition to the other reply, look through the Edit Controls under the Masked section
http://www.codeproject.com/KB/edit/#Edit%20Controls%20-%20Masked%20and%20Validating%20controls[^]
for example code.

You are not the first person with this problem by *miles*. There are good CEdit dropins there with all sorts of nice features, like tooltips, text in grey when your box is empty, etc...

Iain.

Plz sir... ^CPallini ^CPallini abuz drugz, plz plz help urgent.

Re: Number property(Use only digits) of EditBox.

David Crow30-Jun-08 3:11

David Crow

30-Jun-08 3:11

Have you considered a masked edit control?

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three questions about CoInitialize/CoUninitialize

George_George29-Jun-08 17:36

George_George

29-Jun-08 17:36

Hello everyone,

Am I correct for the understanding of the following three questions about CoInitialize/CoUninitialize?

1.

For each thread which utilizes COM, we need to call CoInitialize/CoUninitialize. Not for each process.

2.

There is no harm to call CoUninitialize even if we do not call CoInitialize? And if we call CoInitialize N times on a thread, we need to call CoUninitialize the same of times (N times, not only 1 time) on a thread to release all resources?

3.

CoInitializeEx will invoke CoInitialize?

thanks in advance,
George

Re: three questions about CoInitialize/CoUninitialize

Naveen29-Jun-08 17:44

Naveen

29-Jun-08 17:44

George_George wrote:
For each thread which utilizes COM, we need to call CoInitialize/CoUninitialize. Not for each process.

yes

George_George wrote:
And if we call CoInitialize N times on a thread, we need to call CoUninitialize the same of times (N times, not only 1 time) on a thread to release all resources?

yes

George_George wrote:
CoInitializeEx will invoke CoInitialize?

No. But CoInitialize calls CoInitializeEx with concurrency model as single-thread apartment.

nave

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Re: three questions about CoInitialize/CoUninitialize

George_George29-Jun-08 18:02

George_George

29-Jun-08 18:02

Thanks Naveen,

I have tried call CoInitialize multiple times will result in fail? Could you reproduce it?

regards,
George

Re: three questions about CoInitialize/CoUninitialize

Naveen29-Jun-08 18:35

Naveen

29-Jun-08 18:35

Fail means it return E_FAIL ? I hope you have seen the below lines in MSDN

"Typically, the COM library is initialized on a thread only once. Subsequent calls to CoInitialize or CoInitializeEx on the same thread will succeed, as long as they do not attempt to change the concurrency model, but will return S_FALSE"

nave

[OpenedFileFinder]

Re: three questions about CoInitialize/CoUninitialize

George_George29-Jun-08 18:44

George_George

29-Jun-08 18:44

Thanks nave,

Question answered. This is what I mean.

regards,
George

Re: three questions about CoInitialize/CoUninitialize

Hamid_RT30-Jun-08 19:00

Hamid_RT

30-Jun-08 19:00

1 and 2 are yes and 3: from th MSDN
New applications should call CoInitializeEx instead of CoInitialize.

Re: three questions about CoInitialize/CoUninitialize

George_George30-Jun-08 19:03

George_George

30-Jun-08 19:03

Great reply, thanks Hamid!

regards,
George

data type that is efficient for both 32-bit and 64-bit cpu

followait29-Jun-08 17:24

followait

29-Jun-08 17:24

It's said that 32 bit cpu accesses 32 bit data most efficiently.
So does 64 bit.

Is there any type that is always equal to the cpu bit size? (Maybe it should be the data bus size, I'm sure whether they are always equal).

Re: data type that is efficient for both 32-bit and 64-bit cpu

Naveen29-Jun-08 17:41

Naveen

29-Jun-08 17:41

followait wrote:
Is there any type that is always equal to the cpu bit size?

int

nave

[OpenedFileFinder]

modified on Monday, June 30, 2008 12:35 AM

Re: data type that is efficient for both 32-bit and 64-bit cpu

followait29-Jun-08 19:02

followait

29-Jun-08 19:02

No, it is 4 bytes in both 32-bit and 64-bit machines.

Re: data type that is efficient for both 32-bit and 64-bit cpu

Naveen29-Jun-08 19:11

Naveen

29-Jun-08 19:11

Sorry you are right....

nave

[OpenedFileFinder]

Re: data type that is efficient for both 32-bit and 64-bit cpu

«_Superman_»29-Jun-08 19:19

«_Superman_»

29-Jun-08 19:19

Try DWORD_PTR

« Superman »

Re: data type that is efficient for both 32-bit and 64-bit cpu

Mark Salsbery29-Jun-08 20:28

Mark Salsbery

29-Jun-08 20:28

__int3264
LONG_PTR
DWORD_PTR

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: data type that is efficient for both 32-bit and 64-bit cpu

cmk30-Jun-08 5:35

cmk

30-Jun-08 5:35

size_t

...cmk

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- John Carmack

CTreeview question

monsieur_jj29-Jun-08 16:56

monsieur_jj

29-Jun-08 16:56

Hi,

This maybe a wtl question however an mfc answer may probably help me. My question is that lets say I created a tree

<br />
son = Father.InsertItem ( _T("Main"), TVI_ROOT, TVI_LAST );<br />
son.AddTail ( _T("Sub1"), 0 );<br />
son.AddTail ( _T("Sub2"), 0 )<br />

Now this will look some thing like this
Main
-Sub1
-Sub2

What I need to do is if a user highlights a Tail how can I know which one is it? for example the user highlights Sub1 how can I know that?

Thanks,
Jayjay

Re: CTreeview question

Naveen29-Jun-08 17:40

Naveen

29-Jun-08 17:40

monsieur_jj wrote:
What I need to do is if a user highlights a Tail how can I know which one is it?

When ever user changes the selection in the tree control, a TVN_SELCHANGED message is send to the parent window. The lparam of this message is pointer to NMTREEVIEW strcture and the "itemNew" memeber of this structure is the newly selected item.

nave

[OpenedFileFinder]

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.