Re: positioning CPropertySheet dialog - C / C++ / MFC Discussion Boards

Alvaro Mendez10-Dec-02 4:57

10-Dec-02 4:57

You're building UI thread, right? Are you sure they need UI threads, or can you just go with worker threads?

Anyway, my guess as to why they don't quit is because you're somehow tying up the threads' message pump. If no messages can be processed, then the WM_QUIT message will not be received and the thread will not end. I have no clue as to why it works fine on your box. It may help to show some code.

Also, 60 sounds like a high number of threads for one process. It seems like the CPU will be sitting there doing a lot of context switching while allocating time for all those threads. You may want to use a more efficient method, like a thread pool, to keep the max down, to say, 20 threads.

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

Re: CWinThread problems...

RobJones10-Dec-02 5:15

RobJones

10-Dec-02 5:15

Alvaro Mendez wrote:
You're building UI thread, right? Are you sure they need UI threads, or can you just go with worker threads?

I am using sockets inside these threads.. I was told/heard/read that when ever you are using sockets in a seperate thread you have to use a UI thread because of the message pump.. Basically I have a server app that is going to sit on hundereds of machines.. once every 30 seconds I spawn UI threads to make contact with all the other servers. Once the connection is made (or not made) the servers exchange status and the UI thread exits.. It's really quite simple.. I do all the error checking on the network for failures etc.. if anything goes wrong I post a quit message.. the longest a thread should stay alive should be around 30 seconds.. thats why I put the timer in the thread..

I'll take a look into thread pools (never used them) but they sound nice Smile | :)

I could put a message pump into the thread.. Do you think this may help the thread process messages if something is tying it up? I can post code if you think that would help..

Thanks,
Rob

Re: CWinThread problems...

valikac10-Dec-02 7:50

valikac

10-Dec-02 7:50

What is the reason for a UI thread? For data processing including socket data, I recommend worker threads. Every process has a main thread that serves as a UI thread. Use itto process messages.

Kuphryn

Re: CWinThread problems...

Alvaro Mendez10-Dec-02 9:06

Alvaro Mendez

10-Dec-02 9:06

Rob, I think for a case like this, where you have all these threads running around, and working differently accross machines, your best bet is to use a logging mechanism to determine what's going on. In other words, sprinkle trace messages all over the code (for your threads) and write them to one or more log files to tell you what's going on. It's the only reliable way to debug this stuff. Of course, be sure to have the ability to easily disable them later on whenever you've worked out the kinks.

I'm not sure about needing UI threads for sockets. I'm not experienced with sockets.

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

AVI files in windows 2000

daphna10-Dec-02 3:42

daphna

10-Dec-02 3:42

I have an avi files which run o.k. on window 95'. When we put it on windows 2000 it has a strange behavior. (It start operating without any command - at least not one that I can see or get in the code).
The avi is running on an Active X.
I have created a new avi file which has the same no. of frames but is larger than the old one (The old one is 2M and the new one is 14M) and it run well.
If you know what can be the diffrences and why it behaves like this, or how can I create a good avi file which is also small, please let me know.

Rich Edit and Decimal Tab Stops

xanatos10-Dec-02 3:33

xanatos

10-Dec-02 3:33

I'm using VC.Net with ATL/WTL... But I don't think the problem is in the ATL/WTL! I'm using WinXP sp1 in Italiano (my native language). Here in Italy we use the "," (comma) as decimal point (so we write 1.000,95 instead of 1,000.95).
I've added a decimal tab stop to my RichEdit and it's working well... for an american! Smile | :)

(it uses the . instead of the , as decimal separator)... My Windows is currectly setted (other program write 1.000,95 correctly!). How can I make the Richedit work differently?

Thanks
Max

positioning CPropertySheet dialog

mariuszpopiolek10-Dec-02 2:36

mariuszpopiolek

10-Dec-02 2:36

Hi
I have CPropertySheet (it contains few pages, nothing unusual) modal dialog. After I add my pages I call DoModal. My CPropertySheet can also display another instance of itself. The problem is that newly created dialog is positioned exactly in the same position as the calling dialog, so one can miss that a new dialog has been created. My question is: how can I position newly created dialog so it won't cover the old one? Thanks in advance for any hints.

Mariusz Popiolek

Re: positioning CPropertySheet dialog

Dominik Reichl10-Dec-02 2:51

Dominik Reichl

10-Dec-02 2:51

Firstly make a new static dialog element as "area descriptor".
Then get the position of the new element as a CRect, translate it to client and move the property page to the new position.

Sample code:

CRect rcDlgs;
GetDlgItem(IDC_AREA_PAGES)->GetWindowRect(rcDlgs);
ScreenToClient(rcDlgs);

// Move pages to the page area
m_propertyWindow.MoveWindow(rcDlgs);

-Dominik

Re: positioning CPropertySheet dialog

mariuszpopiolek10-Dec-02 7:46

mariuszpopiolek

10-Dec-02 7:46

I found easier solution (at first I was hoping that there is some trivial solution, for example setting some dialog style,but I think there is not).

In OnInitDialog:
RECT rect;
this->GetWindowRect(&rect);
rect.left += 20;
rect.right += 20;
rect.top += 20;
rect.bottom += 20;
this->MoveWindow(&rect);

It cause that newly opened dialogs are cascading (that is exactly what I wanted to do).

Anyway, thanks Dominik.
I tested it on CDialog but I think that it should work with CPropertySheet

Mariusz Popiolek

CFileDialog trouble

Andrew Medvedev10-Dec-02 1:27

Andrew Medvedev

10-Dec-02 1:27

Hi.
I'll trying to open simple file dialog from view of my single document application. MSDN->Help...
////////////////////// begin ///////////////////////////////////////
// szFilters is a text string that includes two file name filters:
// "*.my" for "MyType Files" and "*.*' for "All Files."
char szFilters[]=
"MyType Files (*.my)|*.my|All Files (*.*)|*.*||";
// Create an Open dialog; the default file name extension is ".my".
CFileDialog *fileDlg =new CFileDialog(TRUE, "my", "*.my",
OFN_EXPLORER | OFN_HIDEREADONLY, szFilters, this);
// Display the file dialog. When user clicks OK, fileDlg.DoModal()
// returns IDOK.
if( fileDlg->DoModal ()==IDOK )
{
CString pathName = fileDlg->GetPathName();
// Implement opening and reading file in here. ...
//Change the window's title to the opened file's title.
CString fileName = fileDlg->GetFileTitle ();
}
delete fileDlg;
/////////////////////////////// end ////////////////////////////////
fileDlg->DoModal() return IDCANCEL and dialog window is not showed... Cry | :((

I try to create dialog based application, insert this block of code and get my dialog... Where is mistake???? Eek! | :eek:

This bug is ONLY on windows NT4 server... XP works fine. Unsure | :~

Used Visual Studio .NET (VC7++)
Thanks for help and sorry for bad english. Wink | ;)

Re: CFileDialog trouble

User 665810-Dec-02 1:31

User 6658

10-Dec-02 1:31

I'm sorry I can't help you. But I have one question: Why do you create the file dialog on the heap? It's enough to create the variable on the stack since the dialog is modal anyway

modified 12-Sep-18 21:01pm.

Re: CFileDialog trouble

Andrew Medvedev10-Dec-02 1:35

Andrew Medvedev

10-Dec-02 1:35

I agree with you... I've just tested. Blush | :O

In original MSDN article dialog created normaly, as variable.
I will correct my post...

Re: CFileDialog trouble

Nitron10-Dec-02 3:17

Nitron

10-Dec-02 3:17

try changing this:

CFileDialog *fileDlg = new CFileDialog(TRUE, "my", "*.my",
                                       OFN_EXPLORER | OFN_HIDEREADONLY, 
                                       szFilters, <code>this</code>);

to either

NULL

AfxGetMainWnd()

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

Re: CFileDialog trouble

Andrew Medvedev10-Dec-02 22:45

Andrew Medvedev

10-Dec-02 22:45

Thanks for your reply...
"NULL", "AfxGetMainWnd()","this" perfectly work, but under win2k and XP.
NT4 don't want to show dialog. DoModal() returns IDCANCEL after call. Cry | :((

Re: CFileDialog trouble

Nitron11-Dec-02 6:39

Nitron

11-Dec-02 6:39

Andrew Medvedev wrote:
NT4 don't want to show dialog.

Hmm... I just noticed u said you are using VS7. I wonder if it's a .net thing. Try re-posting in the .net forum and see if anyone there has experienced this. Good luck.

- Nitron

"Those that say a task is impossible shouldn't interrupt the ones who are doing it." - Chinese Proverb

Window flickering in Taskbar

Ricky_TheBard10-Dec-02 1:16

Ricky_TheBard

10-Dec-02 1:16

Hy everyone! Smile | :)

does anybody can give me some help?
I want that an window of my application flicker in taskbar (if minimized)... does have any message that I can send to it?

thanks!
ps.: sorry my english Wink | ;)

-=Ricky=-

Re: Window flickering in Taskbar

Richard Green10-Dec-02 1:56

Richard Green

10-Dec-02 1:56

Take a look at the FlashWindow and FlashWindowEx functions on MSDN.

Richard

Re: Window flickering in Taskbar

Ricky_TheBard10-Dec-02 6:26

Ricky_TheBard

10-Dec-02 6:26

That's it!
Thanks Richard! Big Grin | :-D

-=Ricky=-

CListCtrl Column width

Paolo Vernazza10-Dec-02 1:13

Paolo Vernazza

10-Dec-02 1:13

I've a CLIstCtrl with the Owner data style.
It works great, but when I try to use SetColumnWidth(LVSCW_AUTOSIZE), it resizes the columns in a wrong way, because it considers only visible elements.

So I decided to detemine the max length; I tryed using either CDC::GetOutputTextExtent than CListCtrl::GetStringWidth, but both ignore the space between the column border and the text, and I can't figure howto determine the size of that... I tryed using GetSystemMetrics with SM_CXFIXEDFRAME and SM_CXEDGE, but they seem to be wrong.

Any ideat?

thanks

Re: CListCtrl Column width

Dominik Reichl10-Dec-02 2:47

Dominik Reichl

10-Dec-02 2:47

To determine the width/height of the scrollbars, use SM_CXVSCROLL/SM_CYVSCROLL as parameters.

Re: CListCtrl Column width

Paolo Vernazza10-Dec-02 4:33

Paolo Vernazza

10-Dec-02 4:33

Thanks, but it's not what I nedd...
The control (in report mode) has many column; any column has:
border (if it is visible or not depend on styles selected)
space
text
space
border.

I need to find the size of that spaces...

Re: CListCtrl Column width

Rage10-Dec-02 5:15

Rage

10-Dec-02 5:15

You could give the column header a fixed size and use LVSCW_AUTOSIZE_USEHEADER instead of LVSCW_AUTOSIZE. Anyway, you can get the longest string in the column, so just set the column width to this string width + a few pixels ? Or didn't I get the thing ?

~RaGE();

Re: CListCtrl Column width

Paolo Vernazza10-Dec-02 5:39

Paolo Vernazza

10-Dec-02 5:39

Using LVSCW_AUTOSIZE_USEHEADER has the same problem than using LVSCW_AUTOSIZE: if a non-visible string is longer than the header it isn't considered.
Yes, what i'm doing il looking for the longest text extent (not the longest string, "w" is larger than "ll") and adding some pixel. But I would like to know how much should be "some pixel"... I think it depends on system font & some other param..

I'm going crazy here ( trying to hook into session object )

Christian Graus10-Dec-02 0:43

Christian Graus

10-Dec-02 0:43

I am trying to pull the current session variables out in an ATL project, called from the asp. The code looks like this:

CContext cxt;
if ( FAILED( cxt.Init( CContext::get_All ) ) )
{
    return E_FAIL;
}

cxt.Response()->Write(_variant_t("This is a test of the veracity of my system <br/>"));

IVariantDictionary* pVD;

cxt.Session()->get_Contents(&pVD);

if (pVD)
{
    int nCount = 0;

    pVD->get_Count(&nCount);

    for (int i = 0; i < nCount; ++i)
    {
        _variant_t vItem;
        _variant_t vIndex(i);
        _variant_t vKey;
        pVD->get_Key(vIndex, &vKey);
        pVD->get_Item(vKey, &vItem);

        cxt.Response()->Write(vKey);
        cxt.Response()->Write(_variant_t(" = "));
        cxt.Response()->Write(vItem);
        cxt.Response()->Write(_variant_t("<br/>"));
    }
}

IRequestDictionary * pDic;

_variant_t v;
cxt.Session()->get_Value( L"Juju", &v);
cxt.Response()->Write(v);


cxt.Request()->get_ServerVariables(&pDic);

if (pDic)
{
    int nCount = 0;

    pDic->get_Count(&nCount);

    for (int i = 0; i < nCount; ++i)
    {
        _variant_t vItem;
        _variant_t vIndex("Juju");
        _variant_t vKey;
        pDic->get_Key(vIndex, &vKey);
        pDic->get_Item(vIndex, &vItem);

        cxt.Response()->Write(vKey);
        cxt.Response()->Write(_variant_t(" = "));
        cxt.Response()->Write(vItem);
        cxt.Response()->Write(_variant_t("<br/>"));
    }
}

and while it can pull out a session ID if I ask it to, and the response stuff works fine, I simply cannot get my hands on the variables I have shoved into the session. Does anyone have any ideas ?

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

C# will attract all comers, where VB is for IT Journalists and managers - Michael P Butler 05-12-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: I'm going crazy here ( trying to hook into session object )

Alvaro Mendez10-Dec-02 5:11

Alvaro Mendez

10-Dec-02 5:11

So which lines are not working as you'd expect? Are you getting the value for "Juju" back in this line: cxt.Session()->get_Value( L"Juju", &v);?

I don't think you're gonna get Juju's value out of the bottom for loop. There you're looping through the SERVER variables -- the ones from the HTTP header, which look like this: AUTH_TYPE, CONTENT_LENGTH, REMOTE_ADDR, SERVER_PORT.

Also, I'd recommend creating variables like request and response at the top of the code. Something like this:

IRequest request = cxt.Request();<br />
IResponse response = cxt.Response();

Then you can just do response.Write(...), which seems more efficient and easier to read.

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

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