Little Splitter problem ! - C / C++ / MFC Discussion Boards

Re: Window Message Problem

Hamid_RT15-Sep-08 3:16

Hamid_RT

15-Sep-08 3:16

Like LVN_KEYDOWN?

WaitForMultipleObjects

_AnsHUMAN_ 15-Sep-08 1:44

_AnsHUMAN_

15-Sep-08 1:44

Greetings all,
While coding for a certain logic, I encountered an error (application crash-not often reproducible) which arose due to the fact that an object of a class was still being accessed by one or more threads. Now the proposed solution is to signal the thread and wait for its completion. What I have is only the thread id.
Is it possible to get the handle to the thread using it's id(I can't do this at the time of thread creation as it is already implemented and I can't change the way it is done) so that I can use WaitForMultipleObjects and wait for the threads to finish their processing before objects of the class are destroyed?
Any help / pointers : appreciated.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: WaitForMultipleObjects

CPallini15-Sep-08 1:52

CPallini

15-Sep-08 1:52

Do you intend this [^]?
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]

set / call two different timmer/ handlers respectively

ptr_Electron15-Sep-08 1:40

ptr_Electron

15-Sep-08 1:40

How can I set two different timmers and , I want to call two different timmer handlers respectively

Re: set / call two different timmer/ handlers respectively

C^hris L^osinger15-Sep-08 1:45

C^hris L^osinger

15-Sep-08 1:45

the first parameter of SetTimer is an ID, which you define. so, you just give each of your timers a different ID:

SetTimer(1, 200);
SetTimer(2, 2000);

...

and then you check the timer ID in OnTimer, to see which timer has fired.

void CMyWnd::OnTimer(UINT nEventID)
{
  switch (nEventID)
  {
     case 1: .... break;
     case 2: .... break;
  }
}

image processing toolkits | batch image processing

Re: set / call two different timmer/ handlers respectively

CPallini15-Sep-08 1:48

CPallini

15-Sep-08 1:48

If I got you:

ptr_Electron wrote:
How can I set two different timmers

Call two times the SetTimer function.

ptr_Electron wrote:
I want to call two different timmer handlers respectively

provide two different callbacks as arguments of the above SetTimer calls.

For instance:

UINT_PTR iTimer1 =  SetTimer( hMyWnd, nIDEvent1, uElapse1, lpCallback1);
UINT_PTR iTimer2 =  SetTimer( hMyWnd, nIDEvent2, uElapse2, lpCallback2);
);

Re: set / call two different timmer/ handlers respectively

Hamid_RT15-Sep-08 2:03

Hamid_RT

15-Sep-08 2:03

Its simple you can calll two different SetTimer. Smile | :)

Little Splitter problem !

CrocodileBuck15-Sep-08 1:03

CrocodileBuck

15-Sep-08 1:03

Hi,

i coded a sdi project with 3 horizonta splitters, no problem.
But now i want a vertical Splitter in the first pane,

********************
*------*-----------*
*------*-----------*
********************
*------------------*
*------------------*
*------------------*
********************
*------------------*
*------------------*
*------------------*
********************

but this doesn't wotk D'Oh! | :doh:

I don't get an error, but the chilsSplitter isn't shown !

Here is my code:

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext) 
{
	CRect cr; 
	GetClientRect(&cr);
	
	m_Splitter_Main.CreateStatic(this, 3, 1);
	m_Splitter_Main.CreateView(0, 0, RUNTIME_CLASS(CTest_01View), CSize(cr.Width(), cr.Height()/3), pContext); 
	m_Splitter_Main.CreateView(1, 0, RUNTIME_CLASS(CTest_01View), CSize(cr.Width(), cr.Height()/3), pContext);  
	m_Splitter_Main.CreateView(2, 0, RUNTIME_CLASS(CTest_01View), CSize(cr.Width(), cr.Height()/3), pContext);
	
	m_Splitter_Child_1.CreateStatic(&m_Splitter_Main, 1, 2, WS_CHILD | WS_VISIBLE, m_Splitter_Main.IdFromRowCol(0, 0));
	m_Splitter_Child_1.CreateView(0, 0, RUNTIME_CLASS(CTest_01View), CSize(100, 0), pContext);
 	m_Splitter_Child_1.CreateView(0, 1, RUNTIME_CLASS(CTest_01View), CSize(0, 0), pContext);
	
	return TRUE;	
}

Many, many thanx for your help !
Best regards
Croc

Re: Little Splitter problem !

David Crow15-Sep-08 5:01

David Crow

15-Sep-08 5:01

You might also need:

void CMainFrame::OnSize(UINT nType, int cx, int cy) 
{    
    if(::IsWindow(m_Splitter_Main.m_hWnd) && ::IsWindow(m_Splitter_Child_1.m_hWnd))
    {
        m_Splitter_Main.SetRowInfo(0, cy/3, 10);
        m_Splitter_Main.SetRowInfo(1, cy/3, 10);
        m_Splitter_Main.SetRowInfo(2, cy/3, 10);
 
        m_Splitter_Child_1.SetColumnInfo(0, cx/2, 10);
        m_Splitter_Child_1.SetColumnInfo(1, cx/2, 10);
 
        RecalcLayout();
    }
}

You could probably call SetRowInfo() and SetColumnInfo() at the end of OnCreateClient(), but I did not try.

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Little Splitter problem !

CrocodileBuck15-Sep-08 8:21

CrocodileBuck

15-Sep-08 8:21

Thx very much ! Big Grin | :-D

Now it works !

Best regards
Croc ! Big Grin | :-D

how to know that we have reached end of file?

kapardhi15-Sep-08 0:59

kapardhi

15-Sep-08 0:59

hai!

i am reading the contents of a text file
the text file contains
"
vicky
vizzy
madan

ganesh

jyothi
"
actually i am taking a loop of 100
i am reading each line at once?
what i need is i want to run loop exactly the no of lines within a file.
As i read the whole line as one string.
i tried this way i used to find the length of string currently read, add the length to the loop variable, but still it counts spaces, is there any concept of End of File or EOF.

thanks!

Re: how to know that we have reached end of file?

toxcct15-Sep-08 1:31

toxcct

15-Sep-08 1:31

kapardhi wrote:
i am reading the contents of a text file

how are you doing this ?

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: how to know that we have reached end of file?

kapardhi15-Sep-08 1:43

kapardhi

15-Sep-08 1:43

CStdioFile cFileObj;
cFileObj.Open (mstrFilePath, CFile::modeRead))

int nFileLen = (int) cFileObj.GetLength ();
for(i = 0; i<nfilelen;i>{
cFileObj.ReadString (strCurrString); // reads whole line at once
i += strCurrString.GetLength();
}

Re: how to know that we have reached end of file?

David Crow15-Sep-08 5:08

David Crow

15-Sep-08 5:08

I'm curious how you knew that ReadString() existed yet did not know what it returned. Confused | :confused:

while (cFileObj.ReadString(strCurrString))
{
    // do something with strCurrString
}

"Love people and use things, not love things and use people." - Unknown

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: how to know that we have reached end of file?

toxcct15-Sep-08 5:42

toxcct

15-Sep-08 5:42

personnally, at that point, I gave up D'Oh! | :doh:

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: how to know that we have reached end of file?

kapardhi15-Sep-08 19:03

kapardhi

15-Sep-08 19:03

Thanks!
i couldn't think this silly logic!
i was just wandering if any funtion exist to show end of file !
anyway thankyou!

Re: how to know that we have reached end of file?

Sarath C15-Sep-08 1:36

Sarath C

15-Sep-08 1:36

There are several methods to read a file. You can use C functions like fopen, fread, etc.. alternatively you can use file streams of C++ and also you can use Windows APIs

If you're using Windows APIs please check the following sample

ReadFile Sample[^]

-Sarath.
"Great hopes make everything great possible" - Benjamin Franklin

My blog - Sharing My Thoughts, An Article - Understanding Statepattern

Re: how to know that we have reached end of file?

_AnsHUMAN_ 15-Sep-08 1:54

_AnsHUMAN_

15-Sep-08 1:54

int _eof( 
   int fd 
);

_eof returns 1 if the current position is end of file, or 0 if it is not. A return value of –1 indicates an error;

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: how to know that we have reached end of file?

kapardhi15-Sep-08 2:37

kapardhi

15-Sep-08 2:37

CStdioFile cFileObj;
CString strFilePath;
strFilePath = "C:\\Documents and Settings\\Desktop\\Test.txt";

// Open the selected file in Read mode
cFileObj.Open (mstrFilePath, CFile::modeRead))

now tell me how to use _eof

Re: how to know that we have reached end of file?

Hamid_RT15-Sep-08 2:41

Hamid_RT

15-Sep-08 2:41

Like MSDN:_eof[^]. Smile | :)

Re: how to know that we have reached end of file?

_AnsHUMAN_ 15-Sep-08 2:55

_AnsHUMAN_

15-Sep-08 2:55

Don't use _eof if you are using CStdioFile.
Check this out:
CFile::Read returns the actual number of bytes read. If this number is less than the bytes requested, then the end of file has been reached.

CStdioFile::ReadString returns a NULL pointer when the end of file has been reached.
so when ReadString returns NULL you know the end of file is reached else continue with your usual functionality.
Hope it makes sense for you now...

kapardhi wrote:
now tell me how to use _eof

(PS) Had you filed the details properly mentioning that you are using CStdioFile I would have offered the right solution in the first go... Frown | :(

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

delete registry key values

Madan Chauhan15-Sep-08 0:17

Madan Chauhan

15-Sep-08 0:17

Hi all,

I need to delete registry key values in VC++.
I want to delete the values of :: HKLM->SYSTEM->MountedDevices

Please suggest me by providing the code hints.

Thanks.

Re: delete registry key values

Joseph Marzbani15-Sep-08 0:37

Joseph Marzbani

15-Sep-08 0:37

Try CReg class within ATL. It offers you so many handy functions.
Rose | [Rose]

Re: delete registry key values

kapardhi15-Sep-08 0:52

kapardhi

15-Sep-08 0:52

hello
this may help you! Try it!

To delete the value and the key it self

::RegDeleteKey((HKEY)hKey,(LPCWSTR)szKey);
here HKEY is HKLM
szKey is resst of the path i.e SYSTEM->MountedDevices

to delete value of key
open the path
OpenKey (LPCTSTR hKey, LPCTSTR szKey)
here HKEY is HKLM
szKey is resst of the path i.e SYSTEM->MountedDevices
then
RegDeleteValue(mhKey,(LPCWSTR)lpValueName)

i hope this will work

Re: delete registry key values

Madan Chauhan15-Sep-08 1:19

Madan Chauhan

15-Sep-08 1:19

Thanks for replying,

I need to delete all values of MountedDevices key. So To delete them one by one I need to put it in to a loop, so how can I know the no of values that are there.
RegDeleteValue(mhKey,(LPCWSTR)lpValueName)
in this function lpValueName I need to pass the value name one by one. But I want to delete all values so that it will take the next value itself.

Thanks.

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