C / C++ / MFC

How to change frame / window focus programatically - after using SetWindowPos

19-Mar-10 22:07

Yep.

“Follow your bliss.” – Joseph Campbell

Vaclav_19-Mar-10 8:16

Vaclav_

19-Mar-10 8:16

I have constructed two property sheet frames and need to switch (programatically)between them.
I can change the Z order and bring the hidden frame to the top using

SetWindowPos(&CWnd::wndTop, 0, 0, 0, 0,
SWP_NOMOVE|SWP_NOSIZE| SWP_NOACTIVATE );

The "problem" is that the original frame still has a focus.
When I use SetFocus the new frame gets hidden again.
ActivateFrame produces same result.

Is there any other way to accomplish this?
Any constructive help is as always appreciated.
Thanks Vaclav

Re: How to change frame / window focus programatically - after using SetWindowPos

Rozis21-Mar-10 2:09

Rozis

21-Mar-10 2:09

is SWP_NOACTIVATE the problem?

Re: How to change frame / window focus programatically - after using SetWindowPos

Vaclav_21-Mar-10 2:19

Vaclav_

21-Mar-10 2:19

Yes,
it does not work at all without it. The windows stays in its Z position , therefore behind the top window of interest.The MSDN explanation of function of SWP_NOACTIVATE is not written in English.
I'll try to get rid of the frame caption / title to see if it works without it( I need it for now to keep track of the property sheets) , but I am busy working on something else now.
Thanks for reply.
Vaclav

Re: How to change frame / window focus programatically - after using SetWindowPos

Avi Berger22-Mar-10 5:10

Avi Berger

22-Mar-10 5:10

Have you considered actually hiding the hidden window: CWnd::ShowWindow( SW_HIDE )? Then it can't have focus and can't be accidentally displayed.

Please do not read this signature.

Re: How to change frame / window focus programatically - after using SetWindowPos

Vaclav_22-Mar-10 5:55

Vaclav_

22-Mar-10 5:55

No, since it is build as second property sheet it is already hidden.
Seems redundant to do so, but I'll give it a shot. The "problem" is that I can show this window by changing the Z order.
But since it is not covering the original property sheet window ( by design) , the user can click in its tabs and "nothing" will happend since the window on top of the Z order is active but without focus!
So to get back to the "main" tab, the user need to click on the top tab (Z order) and than the main tab see it as active dialog and can operate normally.
Vaclav

Dealing with const CString ... [modified] (FIXED).

Maximilien19-Mar-10 4:26

19-Mar-10 4:26

(probably still a bit drunk after drinking too much Bandol wines last night).

I have a 2 small functions :

void Toto( const CString& s )
{
  std::stringstream ss(s.GetBuffer());
  // do some stuff with the ss string.
}
void Something( )
{
  CString s("some string");
  Toto ( s );
}

This obviously does not compile because I cannot get call GetBuffer on a const CString.

any other solution than making a copy of the input string in the function Toto ?

void Toto( const CString& s )
{
  CString s1 = s;
  std::stringstream ss(s1.GetBuffer());
  // do some stuff with the ss string.
}

Thanks.

Max.

Watched code never compiles.

modified on Friday, March 19, 2010 10:53 AM

Cedric Moonen19-Mar-10 4:36

Cedric Moonen

19-Mar-10 4:36

Maximilien wrote:
any other solution than making a copy of the input string in the function Toto ?

Not using GetBuffer() ? Roll eyes | :rolleyes:

You should never call GetBuffer, unless you have a very serious reason to do so. CString provides cast operators, so why would you need to call GetBuffer() ?

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Maximilien19-Mar-10 4:53

19-Mar-10 4:53

yeah, duh ...

that seems to work.

void Toto( const CString& s )
{
std::stringstream ss( (LPCTSTR)s);
// do some stuff with the ss string.
}

Thanks Cédric.

Max.

Watched code never compiles.

Cedric Moonen19-Mar-10 5:17

Cedric Moonen

19-Mar-10 5:17

Normally, you don't need to cast the string explicitely. Did you try without the cast ?

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Maximilien19-Mar-10 5:24

19-Mar-10 5:24

Yep, tried that and gives an compilation error on the std::stringstream.

"cannot convert parameter 1 from 'const CString' to 'const std::basic_string<_Elem,_Traits,_Ax> &'"<br />

Watched code never compiles.

Rajesh R Subramanian19-Mar-10 4:43

19-Mar-10 4:43

Just adding to the above reply...

You could use CString::GetBuffer() if you need access to the internal buffer of the CString object, but after you're done dealing with the buffer, you MUST call CString::ReleaseBuffer(). But by and large, if one of the casting operators would do the job, then you should avoid the call to GetBuffer() and go with the casting operator.

The documentation has more info on this.

“Follow your bliss.” – Joseph Campbell

Maximilien19-Mar-10 4:54

19-Mar-10 4:54

Since I'm only using the CString as a read-only input, I think I don't have to release it.

anyway, I fixed this (see answer to Cédric).

Max,

Watched code never compiles.

Rajesh R Subramanian19-Mar-10 5:10

19-Mar-10 5:10

It's a 'read-only' input now. What about tomorrow, and two years from now? If you'll have to change the code?

It's good practice to release the buffer.

“Follow your bliss.” – Joseph Campbell

Cedric Moonen19-Mar-10 5:15

Cedric Moonen

19-Mar-10 5:15

Rajesh R Subramanian wrote:
It's good practice to release the buffer.

It's even better practice not to call GetBuffer if you don't need to Smile | :)

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Rajesh R Subramanian19-Mar-10 5:16

19-Mar-10 5:16

Exactly, which I mentioned clearly in my previous post. Smile | :)

“Follow your bliss.” – Joseph Campbell

Re: EditBox control Problem

Joe Woodbury19-Mar-10 9:28

Joe Woodbury

19-Mar-10 9:28

Rajesh R Subramanian wrote:
you MUST call CString::ReleaseBuffer().

Only if you change the length of the string.

EditBox control Problem

shiv@nand19-Mar-10 3:58

shiv@nand

19-Mar-10 3:58

I have added a EditBox control to a Dialog and i have selected the property(number : true,VC++ 2005). i have validated, only number can be entered.if user enters characters it will not accept,ok it works fine.But when user copy some text and paste in EditBox it is accepting i am getting strange output. please help how to stop copy and paste text or any character in EditBox .

Adam Roderick J19-Mar-10 4:27

Adam Roderick J

19-Mar-10 4:27

For that you need to implement your own EditBox, like the example given ( Create your own controls - the art of subclassing[^])

And inside which you u have overiride the PreTranslateMessage.
eg:-

BOOL MyEditCtrl::PreTranslateMessage(MSG* pMsg) 
{
	// disable mouse and keyboard copy
	switch( pMsg->message )
	{
	case WM_KEYDOWN:
		{
		     switch( pMsg->wParam )
		      {
		                    case 0x56:
			    {
		                      if( GetKeyState(VK_CONTROL) )
		                       return true;
			    }
			  break;
		       }
		}
		break;

	case WM_RBUTTONDOWN:
		{
		     return true;
		}
		break;
	}
	
	return CMyEdit::PreTranslateMessage(pMsg);
}

Величие не Бога может быть недооценена.

Re: EditBox control Problem

Le@rner20-Mar-10 1:38

Le@rner

20-Mar-10 1:38

Check this::
http://www.codeguru.com/cpp/controls/editctrl/maskededitcontrols/article.php/c9771[^]

List Control to Excel

hellogany19-Mar-10 0:59

hellogany

19-Mar-10 0:59

Hi All

I am using Report View in List control with 5 to 6 columns.

I need to transfer thes data from each column to excel sheet.

Any Way to do it ??

Regards
Gany

Re: List Control to Excel

CPallini19-Mar-10 1:20

CPallini

19-Mar-10 1:20

Have a look at "How To Use MFC to Automate Excel and Fill a Range with an Array".
Smile | :)

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]

Re: List Control to Excel

mesajflaviu19-Mar-10 1:59

mesajflaviu

19-Mar-10 1:59

Or , you can look over here , I was used this class and work fine !

Re: List Control to Excel

Rajesh R Subramanian19-Mar-10 2:16