How to update MFC Control from ActiveX? - C / C++ / MFC Discussion Boards

Re: How to Change Font

Nibu babu thomas9-Jan-09 17:19

Nibu babu thomas

9-Jan-09 17:19

Max++ wrote:
My project is Dialog base and I want to change "Font" of all control on this dialog.

For dynamically changing...

Try using WM_SETFONT with SendMessageToDescendants. A demo here...
http://nibuthomas.wordpress.com/2007/12/06/changing-font-of-all-child-controls-at-one-go/[^]

For a static changing once, change it from the resource editor, goto dialog properties, there you have a button for selecting font.

Another option for doing this once...

http://nibuthomas.wordpress.com/2007/06/28/create-a-dialog-from-its-template/[^]

Nibu babu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

scenary in the client area using visual c++

valli389-Jan-09 13:24

valli38

9-Jan-09 13:24

Plz....Give me an idea or source code to create a scenary in the client area of the frame window.

WTF?

leckey9-Jan-09 15:27

leckey

9-Jan-09 15:27

You posted the same question THREE TIMES within 5 minutes. Not a good start for you.

"Well, we're getting "F"'d at work. WPF, WCF, and WWF... WTF?" --John Simmons

divide the client area in to 4 quadrants and store them with different gradient patterns using visual c++

valli389-Jan-09 13:21

valli38

9-Jan-09 13:21

Requesting source code to divide the client area in to 4 quadrants with different gradient patterns.

divide the client area in to 4 quadrants and store them with different gradient patterns [modified]

valli389-Jan-09 13:20

valli38

9-Jan-09 13:20

Requesting source code to divide the client area in to 4 quadrants with different gradient patterns.(required soon)

modified on Friday, January 9, 2009 7:34 PM

Vector problem in VC++ 2008

pratap19809-Jan-09 9:03

pratap1980

9-Jan-09 9:03

Hi All,

I had poarted VC++ 6.0 code to VC++ 2008. I am facing a problem with this piece of code.

typedef std::vector<char> Buffer;

void LoadFile(CString filePath, Buffer &data)
{
std::ifstream file(filePath, std::ios::in | std::ios::binary);
if (file.fail()) {
ThrowError(GetLastError(), "", (LPCTSTR)filePath);
}

while (!file.eof()) {
char c;
file.get(c);
data.push_back(c);
}
}

File Data: 212*R:\PRDS\Helptable\HL17.DAT *006*R:\PRDS\Helptable\HL58.DAT
<b>When i open the file instead of * i found a box </b>

When i look at the data vector in VC++ 6.0 the first element is 212, second is "r:\..." so on...
but when i retrieve the data vector in VC++ 2008, i am getting individual characters.

I am thinking on the boxes that he used to seperate the elements in the file.

Any suggestion will help me.

Thanks All

Re: Vector problem in VC++ 2008

Stuart Dootson9-Jan-09 12:02

Stuart Dootson

9-Jan-09 12:02

pratap1980 wrote:
first element is 212, second is "r:\..."

First element of what? The vector contains chars, so can't have a string as an element.

pratap1980 wrote:
when i retrieve the data vector in VC++ 2008, i am getting individual characters

That's what I'd expect to see in a vector of chars?

How to update MFC Control from ActiveX?

Member 30175479-Jan-09 8:20

Member 3017547

9-Jan-09 8:20

I am still fairly new to MFC, I have been mainly working on embedded/chip level C.

Now I have a MFC application talking to my controller through ActiveX. Certain data retrieived by ActiveX needs to be displayed to MFC user interface. data retrieiving and filltering are successful. I am trying to pass the data to MFC into an Edit control. Edit control received the notice OK. Then I get stuck. The value of the Edit control is NOT updating until the call to ActiveX is returned. As a result, only the last data is displayed. all data sent while ActiveX is running is not shown to User (although Edit control got all data).

MFC Application -> User Interface -> User Click "Retrieve" -> Display certain data to Edit box on User Interface at run-time.

What am I missing?

in .h file:
afx_msg void OnChangeStatus();

in .c file:
void CReceiveSend::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CReceiveSend)
....
DDX_Text(pDX, IDC_STATUS, X_Current_Status);
....
//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CReceiveSend, CDialog)
//{{AFX_MSG_MAP(CReceiveSend)
...
ON_EN_CHANGE(IDC_STATUS, OnChangeStatus)
...
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

void CReceiveSend::OnChangeStatus()
{
//transfers values from the member variables to the controls
UpdateData( FALSE );

}

inside ActiveX function call:
int CReceiveSend::XReceive()
{
....
X_Current_Status = some_value;
this->SetDlgItemText(IDC_STATUS, X_Current_Status);

return(0);
}

Thanks

Re: How to update MFC Control from ActiveX?

Member 301754712-Jan-09 5:33

Member 3017547

12-Jan-09 5:33

Got answer to my own question Smile | :)

: Use worker thread instead for ActiveX control. It was using User Interface thread before.

Call Stack in Visual C++ 2005

DSPCottage9-Jan-09 6:52

DSPCottage

9-Jan-09 6:52

Dear All

I have one project in VC2005.
In has mose run time error.
But I dont know how to use call Stack in VC2005.
In VC2000, a Call Stack item exists
But in VC2005 in "view->Other Windows " there is no Call Stack

Could you please help me for this problem.
Regards
Mahdi

Re: Call Stack in Visual C++ 2005

CPallini9-Jan-09 7:05

CPallini

9-Jan-09 7:05

Menu Debug->Windows->Call Stack (or ALT + 7) on my VC++ 2008 Express Edition...
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: Call Stack in Visual C++ 2005

DSPCottage9-Jan-09 7:19

DSPCottage

9-Jan-09 7:19

thnax a lot

Re: Call Stack in Visual C++ 2005

CPallini9-Jan-09 7:42

CPallini

9-Jan-09 7:42

You are welcome.
Smile | :)

Moving window causes exception

Paffinity9-Jan-09 6:30

Paffinity

9-Jan-09 6:30

I have an MFC app that is having some weird issues.
When you start the program and don't move window around it works fine. But as soon as you start moving it around, an exception will occur.
Debugging this in VS, I will get a buffer overrun message or some MFC debug assertion. I'm pretty new to MFC, anyone have any ideas where I should look to fix this?

Re: Moving window causes exception

CPallini9-Jan-09 6:43

CPallini

9-Jan-09 6:43

Paffinity wrote:
I'm pretty new to MFC, anyone have any ideas where I should look to fix this?

Very close to the error message (or as last resort, you may post it here).

You should be precise to get any help.
Smile | :)

How to Close or Kill the thread

Member 46517419-Jan-09 4:30

Member 4651741

9-Jan-09 4:30

Hi,

I am using AfxBeginthread in my application for reading the datas from my hardware via serial ports. after clsoing my GUI, when i try to open once again, am getting error that "exe is running". I have closed my handles related to port in destructor of the class. i suspect the Thread is not closed completely, it occupies the memory, i want to know whats the better way to close or kill the thread.

thanks in advance,

Balaji S

Re: How to Close or Kill the thread

Cedric Moonen9-Jan-09 4:47

Cedric Moonen

9-Jan-09 4:47

Use a flag that you set from your main thread.

In your second thread, it looks like:

while (bContinue)
{
// Do processing
}

Once the flag is set to false by your main thread, the loop will finish and the thread function will return, terminating nicely the thread. Of course, how to implement this depends a lot of your current design, this is just the basic principle.

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: How to Close or Kill the thread

Member 46517419-Jan-09 4:51

Member 4651741

9-Jan-09 4:51

Hi,

thanks for your reply.

now am doing by that way, after false condition am using "afxendthread" function. is it recommended to use or coming out from the while loop itself enough to close the thread.

thanks
balajsi

Re: How to Close or Kill the thread

Cedric Moonen9-Jan-09 5:08

Cedric Moonen

9-Jan-09 5:08

Member 4651741 wrote:
now am doing by that way, after false condition am using "afxendthread" function

Never do that. Simply exit the function (but you have to be sure that you exited the function). Never close a thread by calling afxendthread.

Cédric Moonen
Software developer

Charting control [v1.5]
OpenGL game tutorial in C++

Re: How to Close or Kill the thread

Code-o-mat9-Jan-09 4:55

Code-o-mat

9-Jan-09 4:55

Well, just return from the thread routine. Killing a thread is not recommended really...

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: How to Close or Kill the thread

Member 46517419-Jan-09 5:00

Member 4651741

9-Jan-09 5:00

Hi,

thanks,

but my concern is, whether my thread occupy memory after closing the application. thats whay i used afxendthread function

Re: How to Close or Kill the thread

Code-o-mat9-Jan-09 5:19

Code-o-mat

9-Jan-09 5:19

See here[^]. It doesn't seem to matter if you use AfxEndThread or simply return.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <

Re: How to Close or Kill the thread

Mark Salsbery9-Jan-09 11:33

Mark Salsbery

9-Jan-09 11:33

Member 4651741 wrote:
my concern is, whether my thread occupy memory after closing the application

In the link provided by Code-o-mat, see the part about the CWinThread::m_bAutoDelete
member...

Mark

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

C++ and Sqlite connection

vanishaa9-Jan-09 2:45

vanishaa

9-Jan-09 2:45

hi there, i need some help here. I need to develop a standalone application using sqlite and c++...I have used sqlite browser to develop my database. So how does that get connected to c++??

Thank you.

Re: C++ and Sqlite connection

David Crow9-Jan-09 3:03

David Crow

9-Jan-09 3:03

Are you using MFC?

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