Re: Problem with GetFocus - C / C++ / MFC Discussion Boards

Re: List Control Item Height

Steve Echols7-Dec-06 11:54

Steve Echols

7-Dec-06 11:54

Ooops, thought you we're using CListBox. Never mind....

- S
50 cups of coffee and you know it's on!

Re: List Control Item Height

Steve Echols7-Dec-06 12:01

Steve Echols

7-Dec-06 12:01

I think EnsureVisible() could work for you. Save the top index using GetTopIndex, then use EnsureVisible( nTopIndex, FALSE ) to scroll it into view.

- S
50 cups of coffee and you know it's on!

Re: List Control Item Height [modified]

switang8-Dec-06 2:40

switang

8-Dec-06 2:40

Bless you!

It only scrolls until the index is visible on the bottom, so I add the value from GetCountPerPage() minus one:

...
result = listControl->EnsureVisible(
topItemIndex + listControl->GetCountPerPage() - 1,
FALSE);
_ASSERT(result = TRUE);
...

Seems to work, even on 1000+ items.

Hopefully I'll get the time to rewrite to where only modified items will be updated... Laugh | :laugh:

-- modified at 10:41 Friday 8th December, 2006

C# and C++ Integration

Revant Jain7-Dec-06 3:03

Revant Jain

7-Dec-06 3:03

Hi,

I wanted to ask a very simple question. Okay I am reading this article on video conferencing(http://www.codeproject.com/internet/videonet.asp[^]), I was wondering is there anyway I could integrate this into like a C# container. I am creating a eLearning system in C#, but I am forced to use C++ for video conferencing since the encoder has not been ported from C++ to C#. So is it possible for me to create the eLearning system in C# and just add video conferencing facility via c++. Thanks

Re: C# and C++ Integration

led mike7-Dec-06 4:38

led mike

7-Dec-06 4:38

Absolutely. One approach is to use C++/CLI. You can find all sorts of information on MSDN and here at CP. There is even a specific Code Project Forum for C++/CLI[^]

led mike

Re: C# and C++ Integration

ThatsAlok7-Dec-06 18:03

ThatsAlok

7-Dec-06 18:03

Revant Jain wrote:
So is it possible for me to create the eLearning system in C# and just add video conferencing facility via c++. Thanks

COM/ATL would be good start

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and you

Problem with GetFocus

uday kiran janaswamy7-Dec-06 2:47

uday kiran janaswamy

7-Dec-06 2:47

Hi all,

I am operating a Tab to Move the Controls in the Dialog, how can i detected that the Control is got Focused when i am using a Tab Control.

Example:

i am having three controls in a Dialog, i am pressing a Tab in the Key Board then the Cursor moves to all the Controls, here how can i detect that the Control have moved to the Third Control.

Any Ideas with GetFocus(...) Api,

Please help me out.

Uday kiran

Re: Problem with GetFocus

Rajesh R Subramanian7-Dec-06 3:16

Rajesh R Subramanian

7-Dec-06 3:16

Handle the WM_KEYDOWN event and check if its the tab key.

Nobody can give you wiser advice than yourself. - Cicero

Re: Problem with GetFocus

David Crow7-Dec-06 5:14

David Crow

7-Dec-06 5:14

uday kiran janaswamy wrote:
...how can i detect that the Control have moved to the Third Control.

Any Ideas with GetFocus(...) Api,

if (GetFocus() == GetDlgItem(hDlg, IDD_THIRD_CONTROL))
    ...

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Problem with GetFocus

uday kiran janaswamy7-Dec-06 18:13

uday kiran janaswamy

7-Dec-06 18:13

Hi David,

I am very Much Thankfull to give a great idea, Thanks a Lot.

Uday kiran

Book Recommendation

Revant Jain7-Dec-06 2:35

Revant Jain

7-Dec-06 2:35

Hello,

I wanted to start learning WIN32API. Now before that could anyone pls recommend me a good C book. I am familiar with basics of C. If I read a C++ book, would that make a difference?

Thank you

Re: Book Recommendation

Sam Hobbs7-Dec-06 3:20

Sam Hobbs

7-Dec-06 3:20

All new programs should be written using C++, so you should learn it first. You should learn C just to be able to read other people's code.

It is better to learn C++ first without learning Windows programming. Then when you are familiar with C++ learn Windows programming.

Re: Book Recommendation

toxcct7-Dec-06 5:01

toxcct

7-Dec-06 5:01

Don't know where to start ?
Refer the Forums Guidelines and ask a friend

[VisualCalc 3.0][Flags Beginner's Guide]

Re: Book Recommendation

Sam Hobbs7-Dec-06 11:20

Sam Hobbs

7-Dec-06 11:20

I don't need to start.

Perhaps you meant to reply to Revant Jain, the person asking the question.

Re: Book Recommendation

ThatsAlok7-Dec-06 18:04

ThatsAlok

7-Dec-06 18:04

Sam Hobbs wrote:
t is better to learn C++ first without learning Windows programming. Then when you are familiar with C++ learn Windows programming.

good!

<div class='ForumSig'>"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers, Alok Gupta VC Forum Q&A :- I/ IV Support CRY- Child Relief and you </div>

Re: Book Recommendation

Hamid_RT7-Dec-06 18:18

Hamid_RT

7-Dec-06 18:18

I want to know its my problem or no,did you change your sig ? Smile | :)

WhiteSky

Re: Book Recommendation

ThatsAlok7-Dec-06 18:29

ThatsAlok

7-Dec-06 18:29

Forget to turn HTML oN Smile | :)

... how are you HAMID.. sorry belated hAPPY EID

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief and you

Re: Book Recommendation

Hamid_RT7-Dec-06 18:51

Hamid_RT

7-Dec-06 18:51

Thanks after two hard weeks today is holiday with a cloudy weather,by the way How are you? tommarow is holiday for you Big Grin | :-D

WhiteSky

Re: Book Recommendation

Hamid_RT7-Dec-06 17:55

Hamid_RT

7-Dec-06 17:55

In additional see www.cplusplus.com Smile | :)

WhiteSky

loading an image

Sunil P V7-Dec-06 2:29

Sunil P V

7-Dec-06 2:29

Hi all,

I am using pure c++ functions in visual studio 2005 to create a window which behaves similar to a dialog.
I have the handle to this window. Does anyone know how to load an image to this window? the image can be either a gif/bmp format???

Sunil

Sunil

Re: loading an image

C^hris L^osinger7-Dec-06 8:32

C^hris L^osinger

7-Dec-06 8:32

if you're just reading BMP, you can use LoadImage.

for GIF, you'll have to use one of the many imaging toolkits that are available. (or GDI+, if you can use that in your app)

image processing | batch image processing | blogging

Re: loading an image

Hamid_RT7-Dec-06 17:59

Hamid_RT

7-Dec-06 17:59

You can use of CImage class

WhiteSky

CFile does not open

BadJerry7-Dec-06 2:27

BadJerry

7-Dec-06 2:27

Here is the following code part of a COM object (in Visual C++ 6.0)

<br />
   CFile filXML;<br />
   CFileException e;<br />
   if ( !filXML.Open(strFile,CFile::modeCreate | CFile::modeWrite | CFile::typeBinary,&e ) )<br />
   {<br />
      TCHAR lpError[256];<br />
      e.GetErrorMessage(lpError,255);<br />
      // Cannot open file<br />
      CString strError;<br />
      strError.Format(_T("Cannot create file '%s' Cause:%d OS error:%ld Error:'%s'"),strFile,e.m_cause,e.m_lOsError,lpError);<br />
<br />
      if ( pstrError != NULL )<br />
      {<br />
         if ( (*pstrError) != NULL )<br />
            SysFreeString(*pstrError);<br />
         *pstrError = strError.AllocSysString();<br />
      }<br />
<br />
      *pnResult = ERR_CANNOT_CREATE_FILE;<br />
      return S_OK;<br />
   }<br />
<br />

This has always worked. On one installation (called by an ASP.net application) CFile::Open returns false except I get 0 for the cause and -1 for the OS error. The file name seems fine (asp.net can create a file of that name)
Any idea why?

Re: CFile does not open

prasad_som7-Dec-06 2:39

prasad_som

7-Dec-06 2:39

This is just guess.
If its asp.net web service , it runs under user account(I cant remember its name right now), which has minimum access. May be, that user account has not access permission to file in question.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: CFile does not open

BadJerry7-Dec-06 2:45

BadJerry

7-Dec-06 2:45

This is not a web service. And we have granted full write authorisation to every one on the directory which is being written onto. And we can write to it from asp.net. And if CFile:Open fails we should have something in m_Cause. And I am going mad Smile | :)

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