Re: static control issue :-( - C / C++ / MFC Discussion Boards

Anonymous4-Sep-02 23:24

4-Sep-02 23:24

Thank you Tomasz,

It works, but it is still possible to see that that item was clecked, is there a way that it never happends?

Thank you once more

rui

Re: List-View Item States

Tomasz Sowinski4-Sep-02 23:27

Tomasz Sowinski

4-Sep-02 23:27

Use LVIS_SELECTED | LVIS_FOCUSED instead of LVIS_SELECTED.

Tomasz Sowinski -- http://www.shooltz.com

** Putt knot yore thrust inn spel chequers. **

Re: List-View Item States

Anonymous4-Sep-02 23:49

Anonymous

4-Sep-02 23:49

Well, it is still possible to see that the user tried to select an item, thank you the same.

rui

Explorer crashes when terminating my mfc-app

tabor254-Sep-02 22:56

tabor25

4-Sep-02 22:56

Hello,

i wrote an mdi-app with c++/mfc under winnt 4.0. When logging off the current user from winnt, winnt closes all running apps before the login-dialog will be displayed. This works correct for all apps i tested, but when winnt wants to close my app before logging off, the explorer crashes. it seems that the app closes the right way, because no debug-message created by my app is missing in the corresponding debug-file. Where is the difference between closing an app by hand and closing an app automatically by winnt before logging off ? And why can my app cause the explorer to crash ? Please help me, i don't know a way to fix this Confused | :confused:

Best regards
tabor25

Re: Explorer crashes when terminating my mfc-app

Gary R. Wheeler5-Sep-02 2:52

Gary R. Wheeler

5-Sep-02 2:52

You might want to try handling the messages WM_QUERYENDSESSION and WM_ENDSESSION. They are sent to all running applications during the shutdown process.

Gary R. Wheeler

static control issue :-(

Nish Nishant4-Sep-02 22:16

Nish Nishant

4-Sep-02 22:16

I have a static control with the bitmap style and the notify style set.
I have an on click handler as well

ON_STN_CLICKED(IDC_LANG, OnStnClickedStaticlang)

void CRegularDialerDlg::OnStnClickedStaticlang()<br />
{<br />
    .....<br />
    m_langstatic.SetBitmap(LoadBitmap(NULL,<br />
        MAKEINTRESOURCE(IDB_BITMAP5)));<br />
    .....<br />
}

Now as you can see the only thing I do is to change the bitmap [the rest of
the code has nothing to do with the static control]

Now my problem is that the on click does not work anywmore [as if it lost
the notify style bit somehow]

I used Spy++ and found that after one click it won't accept this static
control as a window Frown | :-(

(( [means I cant drag the cross and select this
control]

has anyone else encountered this issue? Is this some kinda bug?

Regards,
Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Re: static control issue :-(

Tomasz Sowinski4-Sep-02 23:13

Tomasz Sowinski

4-Sep-02 23:13

You're passing NULL as 1st argument to ::LoadBitmap. ::LoadBitmap fails. CStatic::SetBitmap (which is just a wrapper over STM_SETIMAGE) gets NULL bitmap and sets the size of control to 0x0 pixels.

You need to pass AfxGetResourceHandle() to LoadBitmap, or, better yet, use CBitmap::LoadBitmap.

Tomasz Sowinski -- http://www.shooltz.com

** Putt knot yore thrust inn spel chequers. **

Re: static control issue :-(

Nish Nishant5-Sep-02 0:44

Nish Nishant

5-Sep-02 0:44

Tomasz Sowinski wrote:
You're passing NULL as 1st argument to ::LoadBitmap. ::LoadBitmap fails

Hmmm. Tomasz, can you take a look at this URL :-
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcmfc98/html/_mfc_cstatic.3a3a.setbitmap.asp

and scroll down to the example :-
[I copy/paste below for your convenience]

Example

CStatic myStatic;

// Create a child bitmap static control.
myStatic.Create(_T("my static"), 
   WS_CHILD|WS_VISIBLE|SS_BITMAP|SS_CENTERIMAGE, CRect(10,10,150,50), 
   pParentWnd);

// Set the bitmap of the static control to be the 
// system check-mark bitmap.
myStatic.SetBitmap( ::LoadBitmap(NULL, MAKEINTRESOURCE(OBM_CHECK)) );

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Re: static control issue :-(

Tomasz Sowinski5-Sep-02 0:55

Tomasz Sowinski

5-Sep-02 0:55

Nish,

You seem to not believe in my explanation Wink | ;)

Anyway, the LoadBitmap call with NULL in the example loads so-called OEM bitmap embedded in one of Windows modules. OBM_CHECK is special, predefined identifer. Obviously, you're loading your own bitmap, not the OEM one. That's why you need non-NULL as first argument to LoadBitmap call.

Read the LoadBitmap docs for more details.

Tomasz Sowinski -- http://www.shooltz.com

** Putt knot yore thrust inn spel chequers. **

Re: static control issue :-(

Nish Nishant5-Sep-02 1:12

Nish Nishant

5-Sep-02 1:12

Tomasz Sowinski wrote:
You seem to not believe in my explanation

Nope, not at all, but I was confused about the sample Blush | :O

Who would dare disbelieve Tomasz Wink | ;-)

Tomasz Sowinski wrote:
Read the LoadBitmap docs for more details.

Yup, just read it and feel silly about not having done so previously Frown | :-(

Thanks again, Tomasz!

Nish

Author of the romantic comedy

Summer Love and Some more Cricket [New Win]

Review by Shog⁹
Click here for review[NW]

Print Unicode on Win98

Eugene Pustovoyt4-Sep-02 22:03

Eugene Pustovoyt

4-Sep-02 22:03

In the program the following code prints the symbols corresponding to the data array:

for (WORD i = 0; i <65536; i ++)
{
CString str = (TCHAR) i;
int x =...; // gets x-coordinate
int y =...; // gets y-coordinate
pDC-> TextOut (x, y, str);
}

On Windows98SE the string will be transformed in ANSI
Whether it is possible on Windows98 to display Unicode. If yes, as it to make (and if it is possible with a small example)

Best regards,
Eugene Pustovoyt

Re: Print Unicode on Win98

Tomasz Sowinski4-Sep-02 23:26

Tomasz Sowinski

4-Sep-02 23:26

This page...

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/win9x/chilimit_5alv.asp[^]

... suggests that TextOut is actually one of few Unicode-supporting APIs on Win9x. And indeed - TextOut documentation says "although not true in general, Windows 95/98 supports the Unicode version of this function as well as the ANSI version"

I'd check if TextOutW works on Win98.

And, there's also MS Unicode Layer for 9x:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/win32/unilayer_33hh.asp[^]

Tomasz Sowinski -- http://www.shooltz.com

** Putt knot yore thrust inn spel chequers. **

Re: Print Unicode on Win98

Eugene Pustovoyt5-Sep-02 18:38

Eugene Pustovoyt

5-Sep-02 18:38

Thank you!

Following code is work on Win98:

WCHAR chSymbol[] = {nValue};
::TextOutW(hDC, x, y, chSymbol, 1);

Best regards,
Eugene Pustovoyt

Passing a pointer to a thread

Floppe4-Sep-02 21:08

Floppe

4-Sep-02 21:08

Hello!

How can I pass a pointer for a class correctly to a CWinThread derived class?

I've got the pointer global decleared as
CMyThread* pThread;
CComPort* pGSM = new CComPort();

and when I start the workerthread I pass along the pointer like this

<br />
void CMyView::OnStartThread()<br />
{<br />
	extern CMyThread* pThread;<br />
	extern CComPort* pGSM;<br />
<br />
	if (NULL != (pThread = new CMyThread()))<br />
	{<br />
		ASSERT_VALID(pThread);<br />
		pThread->m_pThreadParams = NULL;<br />
		pThread->m_pMainWnd = AfxGetMainWnd();<br />
		pThread->m_hWnd = this->GetSafeHwnd();<br />
		pThread->pGSM = pGSM;<br />
		pThread->m_hMutex = CreateMutex( NULL, FALSE, NULL );<br />
		if (!pThread->CreateThread(CREATE_SUSPENDED))<br />
		{<br />
			delete pThread;<br />
			return;<br />
		}<br />
		VERIFY(pThread->SetThreadPriority(THREAD_PRIORITY_BELOW_NORMAL));<br />
		// Now the thread can run wild<br />
		pThread->ResumeThread();<br />
	}<br />
<br />
	return;<br />
}<br />

The application works on some computers, but on others it can halt or even show diffrent status on a bool returned from pGSM.

Thanks,

Floppe

Re: Passing a pointer to a thread [corrected]

Joaquín M López Muñoz4-Sep-02 21:16

Joaquín M López Muñoz

4-Sep-02 21:16

There's nothing wrong in passing a pointer to a thread the way you're doing. What I think could be causing your problem is that you set pThread->pGSM after the thread has started, which opens the possibility that the thread is trying to access the pointer before it is pointing to where it should.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

PS: Excuses, you're not starting the thread before setting its parameters, so the problem must lie somewhere else.

Re: Passing a pointer to a thread [corrected]

Floppe4-Sep-02 21:37

Floppe

4-Sep-02 21:37

Thanks for the quick answer.

I had cut out a little too much from my function in the first post, so I modified it.

I still think there's something wrong with it, because my function pGSM->Initialize() uses ReadFile() to open the serial communication port and iPAQ hangs on ReadFile when I execute it from the workerthread but works if I execute it from the mainthread.

And as I mentioned ... pGSM->IsConnected() returns a BOOL and the workerthread returns correct value, but the mainthread can sometimes return wrong value.

// Floppe

Re: Passing a pointer to a thread [corrected]

Jon Hulatt4-Sep-02 21:49

Jon Hulatt

4-Sep-02 21:49

How does CComPort work internally? I once tried similar things with CAsyncSocket related stuff, and it consistantly screwed up because of the way CAsynCsocket handles messages internally.

I got it working by starting the thread suspended, detaching a handle from the socket, passing the handle to the thread, and then starting the thread. upon start, the thread attached the socket handle to a new CASyncSocket.

COuld it be that CComPort behaves similarly?

STL is a religeon. Enquiries to Reverend Christian Graus

Re: Passing a pointer to a thread

Gary R. Wheeler5-Sep-02 2:59

Gary R. Wheeler

5-Sep-02 2:59

As a rule, any MFC object that uses one of the MFC maps (especially the message map), cannot be shared between threads (since threads have separate message queues). You have to pass handles between threads.

Gary R. Wheeler

How do I toggle the "password" style for an edit box?

fferland4-Sep-02 14:12

fferland

4-Sep-02 14:12

This should be a simple question... Smile | :)

I have an edit box (with the 'password' style set in my resource file) in a dialog that I'd like to use to display either passwords (******) or normal, readable text. I need this behaviour to change dynamically. I tried adding/removing the ES_PASSWORD style from the control, but that didn't work. The edit box still displayed asterisks. How can I get the desired result?

Thanks!

Re: How do I toggle the "password" style for an edit box?

Sprudling4-Sep-02 14:42

Sprudling

4-Sep-02 14:42

SendMessage(hEdit, EM_SETPASSWORDCHAR, 0, 0); // Removes the ES_PASSWORD style

Sprudling

Can I monitor removable device with ReadDirectoryChangesW?

Hiusing4-Sep-02 13:30

Hiusing

4-Sep-02 13:30

Hello,
I would like to monitor any file and directory changes in a removable
device (memory card reader). However, when I create the handle of the drive
it failed.

HANDLE hDir = CreateFile(
"g:\\", // G: is the USB memory card reader
FILE_LIST_DIRECTORY,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OVERLAPPED,
NULL
);

Can I monitor removable device with ReadDirectoryChangesW? If so, how
do I create the handle of that device?

Thanks!

found source of error" invalid handle" need help debugging it

ns4-Sep-02 11:46

4-Sep-02 11:46

Synopsis: crash when run only with breakpoint (no crash if directly run), when there are no prexexisting keys in the registry for the app:

I traced the app to the last closekey where it crashes the hKey3:RegCloseKey(keyHandle3);Initially there are no keys in the registry and OpenKeyEx doesnt make them either. How come this isnt a problem when running without breakpoints (same exact scenario - no keys in registry)?

the values of LONG res = RegOpenKeyEx(keyHandle1, "MyCompany4", myApplication , are 2 and 6 - non success error codes. So should I put my RegQueryValueEx in a big if statement executed only ifOpenKeyEx is successful?

Apparently it doesnt like closing if it didnt open them (they werent present). So the closes should go into the if too, dependent on value of res(not result but res). Is this a sound idea?

BOOL CMainFrame::PreCreateWindow(CREATESTRUCT& cs)
{
	if( !CMDIFrameWnd::PreCreateWindow(cs) )
		return FALSE;
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs
       cs.cy = 600;//::GetSystemMetrics(SM_CYSCREEN) / 3; //
       cs.cx =800;//::GetSystemMetrics(SM_CXSCREEN) / 3; // 


	HKEY keyHandle1, keyHandle2, keyHandle3;
	CString str;
	DWORD valType;
	DWORD xpos, ypos;
	DWORD width, height;
	DWORD valSize = sizeof(DWORD);

	// Open the Software key under HKEY_CURRENT_USER.
	RegOpenKeyEx(HKEY_CURRENT_USER, "Software",
		0, KEY_ALL_ACCESS, &keyHandle1);


	// Open the MyCompany key under Software.
		LONG res = RegOpenKeyEx(keyHandle1, "MyCompany4",
		0, KEY_ALL_ACCESS, &keyHandle2);



	// Open the MyApplication key under MyCompany.
	res = RegOpenKeyEx(keyHandle2, "MyApplication4",
		0, KEY_ALL_ACCESS, &keyHandle3);

	// Get the value of XPosition.
    RegQueryValueEx(keyHandle3, "XPosition",
		0, (LPDWORD) &valType, (LPBYTE) &xpos,
		(LPDWORD) &valSize);

	// Get the value of YPosition.
    RegQueryValueEx(keyHandle3, "YPosition",
		0, (LPDWORD) &valType, (LPBYTE) &ypos,
		(LPDWORD) &valSize);

	// Get the value of Width.
    RegQueryValueEx(keyHandle3, "Height",
		0, (LPDWORD) &valType, (LPBYTE) &height,
		(LPDWORD) &valSize);

	// Get the value of Height.
    LONG result = RegQueryValueEx(keyHandle3, "Width",
		0, (LPDWORD) &valType, (LPBYTE) &width,
		(LPDWORD) &valSize);

	if (result == ERROR_SUCCESS)
	{
		cs.cx = width;
		cs.cy = height;
		cs.x = xpos;
		cs.y = ypos;
	}

	// Close all the open keys.
	RegCloseKey(keyHandle1);
	RegCloseKey(keyHandle2);
	RegCloseKey(keyHandle3);

handles 1 and two dont complain on closing...

Re: found source of error" invalid handle" need help debugging it

C^hris L^osinger4-Sep-02 11:48

C^hris L^osinger

4-Sep-02 11:48

yuck.

have you considered using one of the many registry wrapper classes available here on CP ? they can get rid of all of that open/close hassle and they can really clean up your code. i'll never use the registry APIs again.

-c

"I am angry that so many of the sons of the powerful and well-placed... managed to wangle slots in Reserve and National Guard units...Of the many tragedies of Vietnam, this raw class discrimination strikes me as the most damaging to the ideal that all Americans are created equal and owe equal allegiance to their country."
--Colin Powell

ImgSource!

Re: found source of error" invalid handle" need help debugging it

Pavel Klocek4-Sep-02 11:59

Pavel Klocek

4-Sep-02 11:59

Why not use this class?

Pavel
Sonork 100.15206

Re: found source of error" invalid handle" need help debugging it

Michael Dunn4-Sep-02 16:41

Michael Dunn

4-Sep-02 16:41

You have now learned why you need error checking. Wink | ;)

You can look at ATL::CRegKey or any of the registry wrappers here for guidance on how to write the error checks.

--Mike--
Just released - RightClick-Encrypt v1.4 - Adds fast & easy file encryption to Explorer
My really out-of-date homepage
Sonork-100.19012 Acid_Helm

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