Re: Strange Font bolding - C / C++ / MFC Discussion Boards

James R. Twine27-Feb-07 1:16

27-Feb-07 1:16

   Of course. See the SuspendThread(...) function.

   Edit -- If you are trying to selectively wake the thread up on certain events, create Win32 Event objects, and have the thread wait on them by using functions like WaitForSingleObject(...)/WaitForMultipleObjects(...).

   Peace!

-=- James
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Re: Thread Question

Programm3r27-Feb-07 1:25

Programm3r

27-Feb-07 1:25

Hi, thanx alot James Smile | :)

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r

Re: Thread Question

Newbie0027-Feb-07 1:19

Newbie00

27-Feb-07 1:19

Programm3r wrote:
Is it possible to pause the thread or put it in a standby mode

Yes it is. You can use events:

//The CreateEvent function creates a named or unnamed event <br />
//object. <br />
<br />
HANDLE CreateEvent(<br />
<br />
    LPSECURITY_ATTRIBUTES lpEventAttributes,	// pointer to security attributes  <br />
    BOOL bManualReset,	// flag for manual-reset event <br />
    BOOL bInitialState,	// flag for initial state <br />
    LPCTSTR lpName 	// pointer to event-object name  <br />
   );<br />
<br />
//The SetEvent function sets the state of the specified event object to <br />
//signaled. <br />
<br />
BOOL SetEvent(<br />
<br />
    HANDLE hEvent 	// handle of event object <br />
   );<br />
<br />
//The ResetEvent function sets the state of the specified event object <br />
//to nonsignaled. <br />
<br />
BOOL ResetEvent(<br />
<br />
    HANDLE hEvent 	// handle of event object <br />
   );	<br />
 <br />
//The WaitForSingleObject function returns when one of the following <br />
//occurs:<br />
<br />
//·	The specified object is in the signaled state.<br />
//·	The time-out interval elapses.<br />
<br />
 <br />
<br />
DWORD WaitForSingleObject(<br />
<br />
    HANDLE hHandle,	// handle of object to wait for <br />
    DWORD dwMilliseconds 	// time-out interval in milliseconds  <br />
   );

You can also use these functions:

//The SuspendThread function suspends the specified thread. <br />
<br />
DWORD SuspendThread(<br />
<br />
    HANDLE hThread 	// handle to the thread <br />
   );<br />
<br />
/*The ResumeThread function decrements a thread's suspend count. When the suspend count is decremented to zero, the execution of the thread is resumed. */<br />
<br />
DWORD ResumeThread(<br />
<br />
    HANDLE hThread 	// identifies thread to restart <br />
   );	<br />

Also Creating critical sections suspends threads when they are trying to use same datas as other threads which are using it in the same time.

Re: Thread Question

Programm3r27-Feb-07 1:27

Programm3r

27-Feb-07 1:27

Hi, thanx alot newbie .... I think you can upgrade your screen name to not_a_newbie_any_more Smile | :)

Regards,

The only programmers that are better than C programmers are those who code in 1's and 0's..... Smile | :)

Programm3r

Re: Thread Question

Nibu babu thomas27-Feb-07 3:37

Nibu babu thomas

27-Feb-07 3:37

Programm3r wrote:
Is it possible to pause the thread or put it in a standby mode?

Along with what others said...

Use _beginthreadex as you can also specify a flag CREATE_SUSPEND which creates the thread in suspended mode.

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: Strange Font bolding

super_ttd27-Feb-07 0:09

super_ttd

27-Feb-07 0:09

excelent answer... and shame on me

thanks mate

Re: Strange Font bolding

Nibu babu thomas27-Feb-07 0:12

Nibu babu thomas

27-Feb-07 0:12

super_ttd wrote:
and shame on me

Why! Nothing to feel ashamed of. Smile | :)

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: Strange Font bolding

super_ttd27-Feb-07 21:55

super_ttd

27-Feb-07 21:55

thanks Nibu Babu Thomas Wink | ;)

i tried it at home yesterday evening, and effectively, that's working as expected.

i have a subsidiary question. do you know how I could bold the MenuItem in a PopupMenu created with the following :

void CtestDlg::OnPopupMenu()
{
    CMenu popup;
    if (popup.CreatePopupMenu())
    {
        popup.AppendMenu(MF_STRING, 1, "Test Titre");
        popup.AppendMenu(MF_SEPARATOR);
        popup.AppendMenu(MF_STRING, 10, "menuItem1");
        popup.AppendMenu(MF_STRING, 11, "menuItem2");
        popup.AppendMenu(MF_STRING, 12, "menuItem3");
        popup.EnableMenuItem(1, MF_GRAYED);    // I'd like to bold it too... 
 
        CRect rect;
        m_popupMenu.GetWindowRect(&rect);
        popup.TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, rect.right+1, rect.top, AfxGetMainWnd());
        popup.DestroyMenu();
    }
}

Re: Strange Font bolding

Nibu babu thomas28-Feb-07 17:24

Nibu babu thomas

28-Feb-07 17:24

super_ttd wrote:
i have a subsidiary question. do you know how I could bold the MenuItem in a PopupMenu created with the following :

I don't think you can set menu item font to bold. Of course you can make an item as default which will in turn make that menu item a bold one.

It's a bad practice to set all menu items to bold. As per convention only a default menu item should have bold typeface.

Default menu font's are managed by windows itself. We can't do and we should not interfere with this process.

If it's a must for you to do this then create custom menu completely different from existing menu provided by windows as Microsoft office and visual studio has done.

Nibu thomas
A Developer

Programming tips[^] My site[^]

Re: Strange Font bolding

super_ttd28-Feb-07 21:30

super_ttd

28-Feb-07 21:30

hum, i didn't know about default menu items. i'll try that.

actually, what i have is a button, which pops up a popupMenu next to it when clicked.
On this menu, the first element is the name of the current application (grayed BTW), and the second element is a separator. only then follow the really clickable items.
I would like now to bolden the application title, but as you can understand, it will not be clickable, because grayed.
i don't know if setting it as the default item will work anyway, but i'll give it a try and i'll tell you.

thanks for your input dear.

Re: Strange Font bolding

Nibu babu thomas28-Feb-07 21:36

Nibu babu thomas

28-Feb-07 21:36

super_ttd wrote:
actually, what i have is a button, which pops up a popupMenu next to it when clicked.
On this menu, the first element is the name of the current application (grayed BTW), and the second element is a separator. only then follow the really clickable items.
I would like now to bolden the application title, but as you can understand, it will not be clickable, because grayed.
i don't know if setting it as the default item will work anyway, but i'll give it a try and i'll tell you.

Try this[^] article. I use this quite often. Smile | :)

Nibu thomas
A Developer

Programming tips[^] My site[^]

i want to know when a button is clicked but it was "DISABLED"

Ing.Raiz8227-Feb-07 0:08

Ing.Raiz82

27-Feb-07 0:08

Hi All,

i have a button "DISABLE", BUT i want to know when the user click it... is possible??

thanks in advanced

Cool | :cool:

Raiz

Re: i want to know when a button is clicked but it was "DISABLED"

prasad_som27-Feb-07 0:15

prasad_som

27-Feb-07 0:15

Ing.Raiz82 wrote:
is possible??

No.

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

Re: i want to know when a button is clicked but it was "DISABLED"

James R. Twine27-Feb-07 1:14

James R. Twine

27-Feb-07 1:14

   Do you want to know if the user tried to activate the disabled button? If so, trap mouse messages like WM_MOUSEMOVE and WM_LBUTTONUP (not WM_LBUTTONDOWN - normal buttons activate on the release of the mouse button).

   If you are worried about some other application sending you artificial button click messages (like the application that automatically dismisses the Outlook "something is trying to send email on your behalf" dialog), look for WM_COMMAND messages for that button, and if you know button's state when you last set it, you can determine if the message is real or not.

   Peace!

Re: i want to know when a button is clicked but it was "DISABLED"

Ing.Raiz8227-Feb-07 4:01

Ing.Raiz82

27-Feb-07 4:01

thanks
... is a good idea...
now i try....

thanks

Raiz Roll eyes | :rolleyes:

Destroy View

baerten27-Feb-07 0:04

baerten

27-Feb-07 0:04

Hi,

i create a Frame within a TabWnd. In the different Tabs, i place a View.
If i click on button on the view, i create dynammicaly a new View and replace it.
If the user wishes to close this new View, the old view returns.

The changing works nice, but i have trouble to close and delete the view.
I send a WM_CLOSE to the view and after this a delete :

LRESULT ViewTabWnd::CloseOld(WPARAM w, LPARAM l)
{
CWnd* Old = (CWnd*)w;
Old->SendMessage(WM_CLOSE);
delete Old;
return TRUE;
}

But at "delete Old" i have the error :

Last Trace : (<<<<<<< indicates the debug-trace )

void PASCAL CObject::operator delete(void* p)
{
#ifdef _AFX_NO_DEBUG_CRT
free(p);
#else
_free_dbg(p, _AFX_CLIENT_BLOCK); <<<<<<<<<
#endif
}

if (pHead->nBlockUse == _IGNORE_BLOCK)
{
_ASSERTE(pHead->nLine == IGNORE_LINE && pHead->lRequest == IGNORE_REQ);
/* fill the entire block including header with dead-land-fill */
memset(pHead, _bDeadLandFill,
sizeof(_CrtMemBlockHeader) + pHead->nDataSize + nNoMansLandSize);
_free_base(pHead); <<<<<<<<<<<<<<<<<
RTCCALLBACK(_RTC_FuncCheckSet_hook,(1));
return;
}

Does anyone knows this problem ?
I'm confused Sigh | :sigh:

Thanks

Re: Destroy View

prasad_som27-Feb-07 1:38

prasad_som

27-Feb-07 1:38

Looks like pointer you are deleting is already deleted and dangled .

baerten wrote:
LRESULT ViewTabWnd::CloseOld(WPARAM w, LPARAM l)

How this message/function is called ?

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

Re: Destroy View

baerten27-Feb-07 1:51

baerten

27-Feb-07 1:51

thanks

via a PostMessage

LRESULT ViewTabWnd::CloseOld(WPARAM w, LPARAM l)
{
CWnd* Old = (CWnd*)w;
Old->SendMessage(WM_CLOSE);
delete Old; << I step here, then via F10 i step into the destructor and then the error is launched
return TRUE; << i never step here
}

Damn

baerten27-Feb-07 4:02

baerten

27-Feb-07 4:02

I found the error ...

It's a variable which has a wrong syntax, i wrote bool at place of BOOL

D'Oh! | :doh:

5 hours of recherche for nothing Dead | X|

Thanks anyway Smile | :)

Re: Damn

prasad_som27-Feb-07 4:16

prasad_som

27-Feb-07 4:16

baerten wrote:
It's a variable which has a wrong syntax, i wrote bool at place of BOOL

Nice to see, your error is solved.
But, really cant understand how it affects your code. Can you show changes , you needed to make.

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

Re: Damn

baerten27-Feb-07 21:02

baerten

27-Feb-07 21:02

i changed only bool to BOOL.

bool isn't a MFC Datatype, but however it could create it ( bool is used in .NET )
But at the destruction of this datatype he had the error.
But only if i create the view dynamicaly. If i created the same view with a Frame via CreateView
the error doesn't occur.

So, i could step into the Destructor and after the destructor all variables will be destroyed
and there, he had the error Sniff | :^)