C / C++ / MFC Discussion Boards

Re: SplitterWnd in CMainFrame (MDI)

David Crow29-Nov-05 8:31

David Crow

29-Nov-05 8:31

LionAM wrote:
What I want is to have an form on one side of the
program where I can place several controls.

So can't you use CFormView for this?

"Take only what you need and leave the land as you found it." - Native American Proverb

Socket on Thread PB

rofrantz22-Nov-05 2:43

rofrantz

22-Nov-05 2:43

I have the following pb:
I have an simple MFC app where I launch a function(INIT) that starts a thread(THREAD 1=wait for connection) that connects to a socket(CSocket).After the connection,I Detach and get the handle...now...my pb is this:
if I re-Attach the handle of the socket after the connection in the INIT function then when my server "dies"...I get the OnClose event on the CSocket object...but if I try to re-Attach the handle of the socket inside that Thread 1 or even in another Thread 2...I never receive that notification of the OnClose event
Anyone knows why, and the most important...does he have a solution for this pb ?

(I admit that I'm a begginer with MFC)

Of all the things I've lost, my mind I miss the most

Re: Socket on Thread PB

Roger Stoltz22-Nov-05 10:57

Roger Stoltz

22-Nov-05 10:57

Sorry, you lost me after the start-a-thread-that-waits-for-a-connection-that-connects-to-a-socket thing... Confused | :confused:

Have a look at the MSDN samples chatter/chatsrv that shows socket basics and see if that helps. You'll find it here[^]

If things doesn't light up for you, post again and describe what you are trying to do and why you think you need multiple threads.
Perhaps you should derive your socket class from CAsyncSocket instead...;)

It's supposed to be hard, otherwise anybody could do it!

how to prevent property page from been changed?

includeh1022-Nov-05 2:07

includeh10

22-Nov-05 2:07

an application has a property-sheet with multiple pages, each page is associated with a thread.

when a thread is running, I hope the property-page containing the thread is always active (at top of other pages), or other pages can NOT be selected as active-page.

how to do that?

includeh10

Re: how to prevent property page from been changed?

David Crow22-Nov-05 3:18

David Crow

22-Nov-05 3:18

To keep a particular page from being activated, return zero from OnKillActive(). The default is to return non-zero thus all pages can be activated.

"Take only what you need and leave the land as you found it." - Native American Proverb

Re: how to prevent property page from been changed?

includeh1022-Nov-05 12:18

includeh10

22-Nov-05 12:18

it works.
thx

includeh10

Dialog question

Lampros Giampouras22-Nov-05 1:51

Lampros Giampouras

22-Nov-05 1:51

I have no experience yet in dialog based programming and i have this problem..

I have several edit boxes in a dialog wich take numbers and I want to calculate another number based on these. I put a button and made the function but the number doesn't appear. It's like the edit boxes are still in 0. Should I call something to take the values fron the edit boxes?

thanks

Re: Dialog question

NYTSX22-Nov-05 2:14

NYTSX

22-Nov-05 2:14

You have to get the text from each individual edit box. I usually have a member variable and just call GetWindowText() and store it in another variable.
In order for you to make calculations on this number use the appropriate data conversion routines.

Re: Dialog question

Hans Ruck22-Nov-05 2:17

Hans Ruck

22-Nov-05 2:17

If you're using DDX with MFC or WTL you should call UpdateData() before using the associated variables.

"dire io è lento, dire noi è rock"

rechi+

Re: Dialog question

toxcct22-Nov-05 2:30

toxcct

22-Nov-05 2:30

There are 2 ways.
let's say you make an addition between two controls, and return the answer into a 3rd editBox.

1. if you have member variables for you controls, do this :

UpdateData(TRUE);    //to load the control content into the member variable
m_Answer = m_LeftOperand + m_RightOperand;
UpdateData(FALSE);    //to update the controls with the new variables' contents

if you access your controls by pointers, you could use the following :

CString strAnswer       = _T("");
CString strLeftOperand  = _T("");
CString strRightOperand = _T("");
CEdit* peAnswer       = (CEdit*)GetDlgItem(IDC_ANSWER_EDIT);
CEdit* peLeftOperand  = (CEdit*)GetDlgItem(IDC_LEFT_OPERAND_EDIT);
CEdit* peRightOperand = (CEdit*)GetDlgItem(IDC_RIGHT_OPERAND_EDIT);
 
peLeftOperand->GetWindowText(strLeftOperand);
peRightOperand->GetWindowText(strRightOperand);
strAnswer.Format(_T("%f"), ::atof(strLeftOperand) + ::atof(strRightOperand));
peAnswer->SetWindowText(strAnswer);

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: Dialog question

Lampros Giampouras22-Nov-05 2:47

Lampros Giampouras

22-Nov-05 2:47

Thanks very much, that helped..

How to implement the "Find Dialog" by reading/comparing the values in STL LIST

zxc8922-Nov-05 1:13

zxc89

22-Nov-05 1:13

I had designed a dialog box which is a "Find dialog"(what we generally see when we press "ctrl+f")..

Now in my application when i enter any " name" or "value" in the 'find dialog box',the focus should shift to that particular

place(name/value)..All the "name" & "values" are stored in the 'STL list'..I have to search those values/names and find out

whether the matching was found or not for the entered name/value in the 'find dialog'..

But the program is not responding properly..when i debug,the error shown is "Object Reference not set to an instance of an

object" for the "for loop" implemented..

for(iterator = member.begin(); iterator != member.end();iterator++)

Plz Help Me..

Thanks!!

Re: How to implement the &amp;quot;Find Dialog&amp;quot; by reading/comparing the values in STL LIST

Bob Ciora22-Nov-05 1:22

Bob Ciora

22-Nov-05 1:22

I assume member is your STL list. What are the contents of the loop itself?

Bob Ciora

-- modified at 7:23 Tuesday 22nd November, 2005

Background Colors

Willem Le Roux22-Nov-05 0:56

Willem Le Roux

22-Nov-05 0:56

Hi Guys!

Can anybody help me to change the background Color of a controll? I want to use a static controll and change the BG to white. I want to use it in my wizards...

Atrernativly, can somebody help me with panels? I have seen them in C# but I cant seem to locate them in C++. I am using VS 6.0! I know it is a bit dated, but any help would be appreciated!

Many thanks

Re: Background Colors

Owner drawn22-Nov-05 1:00

Owner drawn

22-Nov-05 1:00

It's easy to change the background of static control.

Just handle the WM_CTLCOLOR message.

Here is a sample from MSDN

// This OnCtlColor handler will change the color of a static control
// with the ID of IDC_MYSTATIC. The code assumes that the CMyDialog
// class has an initialized and created CBrush member named m_brush.
// The control will be painted with red text and a background
// color of m_brush.

HBRUSH CYourDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor) 
{
   // Call the base class implementation first! Otherwise, it may
   // undo what we're trying to accomplish here.
   HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);

   // Are we painting the IDC_MYSTATIC control? We can use
   // CWnd::GetDlgCtrlID() to perform the most efficient test.
   if (pWnd->GetDlgCtrlID() == IDC_MYSTATIC)
   {
      // Set the text color to red
      pDC->SetTextColor(RGB(255, 0, 0));

      // Set the background mode for text to transparent 
      // so background will show thru.
      pDC->SetBkMode(TRANSPARENT);

      // Return handle to our CBrush object
      //Take note of this one. It is very import that you return the specific
      //brush that you created to color the background of this static.
      hbr = m_brush;
   }

As far I know there is no panel in VC++ 6.0.

But what you can do is.

Create a class derived from CWnd that can act as a panel.

<marquee direction="up" height="30" scrolldelay="1" step="1" scrollamount="1" hspace="0" vspace="0">
--Owner Drawn
--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord

Re: Background Colors

David Crow22-Nov-05 3:24

David Crow

22-Nov-05 3:24

Willem Le Roux wrote:
Can anybody help me to change the background Color of a controll? I want to use a static controll and change the BG to white.

I have a semi-related example here, towards the bottom.

"Take only what you need and leave the land as you found it." - Native American Proverb

Build Problem

Great A'Tuin22-Nov-05 0:48

Great A'Tuin

22-Nov-05 0:48

hi,

i got a really annoying problem with my build utility in visual studio 6.0! everytime i try to launch my program (which has been compiled and linked correctly) by pressing CTRL + F5 i got a message that says some of my .obj files were out of date or could not be found and so i have to rebuild them (4 files). wtf? these files already exist and don't need to be rebuild!!! my project consists of about 60 files and only these 4 files produce this stupid message. why ??? there's nothing special about them.

is this a bug in vs 6.0 or just something that could be fixed with some compiler settings ?

thanks in advance!

-- modified at 6:55 Tuesday 22nd November, 2005

Re: Build Problem

kakan22-Nov-05 1:14

kakan

22-Nov-05 1:14

Hello.

Have a look at the timestamps on those 4 source files. That's one common cause of the kind of problems.

Re: Build Problem

Bob Ciora22-Nov-05 1:16

Bob Ciora

22-Nov-05 1:16

Have you changed any of those 4 files in a while? This might be caused by those files having a bad date...a date that's in the future and causing them to always be "out of date" since they're always newer than the final executable. Maybe try opening each of them, adding and deleting a space, then saving them back to disk.

Bob Ciora

Re: Build Problem

Great A'Tuin22-Nov-05 1:19

Great A'Tuin

22-Nov-05 1:19

no idea what exactly the problem was, but it seems that these 4 files haven't been modified for a little while and according to that they couldn't be generated well. if you ask me this doesn't make munch sense, but a little shift of some characters has solved the problem.

what a crap!!

Re: Build Problem

Owner drawn22-Nov-05 22:10

Owner drawn

22-Nov-05 22:10

Try to open those files in Notepad and then save it. This will help.

<marquee direction="up" height="30" scrolldelay="1" step="1" scrollamount="1" hspace="0" vspace="0">
--Owner Drawn
--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord

Unable to get Automatic Statement Completion

pani6822-Nov-05 0:16

pani68

22-Nov-05 0:16

Hello!

I am using Visual C++6, Enterprise Edition. My problem in editing is that, when I create a project everything works fine, however, after addition of some functions etc., the Automatic Statement Completion does not work. When I do it manually (writing down the code for member variables & functions)the program compiles and runs.

It is mentioned in MSDN that when there is a code error above the cursor the option will not be available. Since there is no compilation error how come there can be a code error?

Please help me if you can!

pani Sleepy | :zzz:

Re: Unable to get Automatic Statement Completion

ThatsAlok22-Nov-05 0:26

ThatsAlok

22-Nov-05 0:26

pani68 wrote:
Please help me if you can!

Close your workspace/project-> Delete [projectname].ncw and [projectname].clw file -> restart the project again, your auto complete featue will start working again!

"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

Re: Unable to get Automatic Statement Completion

pani6822-Nov-05 1:20

pani68

22-Nov-05 1:20

Thanks!

I did not get the .ncw file. My problem was solved after deleting .clw and .ncb files.

pani Laugh | :laugh:

Re: Unable to get Automatic Statement Completion

ThatsAlok22-Nov-05 18:17

ThatsAlok

22-Nov-05 18:17

pani68 wrote:
I did not get the .ncw file.

I Mean .ncb file there, sorry for miscommunication

"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

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