C / C++ / MFC Discussion Boards

Re: List Control on a modelless dialog can't be refreshed correctly

Cristian Amarie26-Dec-06 2:05

Cristian Amarie

26-Dec-06 2:05

Check with spy++ the list size and visibility while the main dialog is minimized.

Re: List Control on a modelless dialog can't be refreshed correctly

Hamid_RT26-Dec-06 7:36

Hamid_RT

26-Dec-06 7:36

If you use of RedrawWindow what happens

WhiteSky

Re: List Control on a modelless dialog can't be refreshed correctly

eat_union27-Dec-06 0:22

eat_union

27-Dec-06 0:22

It's a MFC bug, I think.

first, I should say "List Control remains not refreshing" means "List Control disappeared".
I'm sorry to my poor english!

In order to produce the problem, the main dialog must has a tab control(Last time, I forgot to explain), and the modelless dialog must covers total or part of the tab control.

I can solve the problem(use RedrawWindow to force the List Control Repaint when main dialog be restored),but I want to know why.

will you please have a try, and I'm sure you'll get the problem.

Re: List Control on a modelless dialog can't be refreshed correctly

Mark Salsbery27-Dec-06 5:46

Mark Salsbery

27-Dec-06 5:46

This is not an MFC bug. Listbox controls have nothing to do with MFC.

how to configure that filterchain??(directshow problem)

selectgood25-Dec-06 20:23

selectgood

25-Dec-06 20:23

hello all:
i want to use the 'avi/wav file source filter' in my filtergraph,but the method AddSourceFilter(...) by graphbuilder add the filter 'file source filter' in the filterchain,how can i change that,and to configure the filepath for my 'avi/wav file source filter'.
sorry for my poor english
thanks in advance
henry

Re: how to configure that filterchain??(directshow problem)

Mark Salsbery26-Dec-06 6:24

Mark Salsbery

26-Dec-06 6:24

What part is giving you trouble?

File Source (Async) Filter
CLSID = CLSID_AsyncReader
Category = CLSID_LegacyAmFilterCategory

File Source (URL) Filter
CLSID = CLSID_URLReader
Category = CLSID_LegacyAmFilterCategory

If you've added the file source filter then use its IFileSourceFilter interface's Load() method
to get the filter to load the file.

how to select the all the child checkboxes when a root is selected/clicked

ramesh_s2125-Dec-06 19:19

ramesh_s21

25-Dec-06 19:19

hi this is ramesh .

i am writing a small win32 appl..i am using hierarchical stucture of check boxes in it(Tree view)

the functionality i badly needed is if i select a root item the child checkboxes should also get selected. could u help me to solve this problem??

if u have any example applications could u send me??

my mail id is sramesh21@gmail.com .

thanks in advance.
regards,
ramesh s

ramesh s

Re: how to select the all the child checkboxes when a root is selected/clicked

_AnsHUMAN_ 25-Dec-06 19:52

_AnsHUMAN_

25-Dec-06 19:52

ramesh_s21 wrote:
how to select the all the child checkboxes when a root is selected/clicked

You would be getting an event on the click of the root item.
Then get the children of the root and set them as checked using SetCheck...
I do think that you would be able to iterate through the child check boxes when the user clicks on the root.

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

_AnShUmAn_

Re: how to select the all the child checkboxes when a root is selected/clicked

Cristian Amarie25-Dec-06 22:41

Cristian Amarie

25-Dec-06 22:41

1. Implement notifications (NM_CLICK, TVN_KEYDOWN) to be notified when the user changes a root node checkbox state.
2. Implement and manage the LPARAM of inserted TVITEMs in tree to can retrieve HTREEITEM from LPARAM.
3. Use TreeView_SortChildrenCB macro, called when you need to also check all child items; the compare function will return 0 and will just modify the item state. Callback sort function will receive the lParam1 and lParam2 and will locate the HTREEITEMs from these (see 2). Finally, you set the nodes' checked state for both.

Re: how to select the all the child checkboxes when a root is selected/clicked

ramesh_s2126-Dec-06 18:08

ramesh_s21

26-Dec-06 18:08

thanks cristian amarie.

could u plz get me sample code for tree view control with check boxes,if u have any?

thanks in advance.
regards,
ramesh s

ramesh s

Re: how to select the all the child checkboxes when a root is selected/clicked

Cristian Amarie26-Dec-06 20:19

Cristian Amarie

26-Dec-06 20:19

I don't have one now, but for sure there are a number in MSDN samples and Platform SDK (try the older ones if you can spot some copies - the newer MSDN/PSDK seems to be more .NET oriented than API oriented).
CP also may have tree view samples as well.

I remember a sample containing almost all common controls, showing messages, notifications etc. - I don't remember the name now, was something with the solar system's planets in a listview. Check in MSDN, it won't be too hard to locate it and contains almost all you need to know. And more.

Socket connection

Syamlal S Nair25-Dec-06 18:27

Syamlal S Nair

25-Dec-06 18:27

Hi all,

I am trying to make a chat server and client, for which I am inheriting the MFC CAsyncSocket. But the class member called Connect() is not properly responding. It shuld return nonzero value when connection succeeds and 0 if fails.But, it always returns zero,even when the connection succeeds.If the server is not listening, then also connection succeeds, but GetSockName() gives IpAddress=0.0.0.0, not the one which we specify for connecting. If server is listening, then the Ip Address which GetSockName() gives is correct.

I even tried with GetLastError() but it always returns a value 10035 even if the server is listening or not.

Please help me by providing a way to identify whether connection is success or failure..
thanks in advance...

SYAMLAL

Re: Socket connection

prasad_som25-Dec-06 21:28

prasad_som

25-Dec-06 21:28

SyamlalS wrote:
it always returns zero,even when the connection succeeds

It returns 0 means , connection is not succesful. How you know that it is succesful ?

SyamlalS wrote:
If the server is not listening, then also connection succeeds,

How you are deciding it, as 0 return value is for failure.

SyamlalS wrote:
but it always returns a value 10035 even if the server is listening or not.

error code 10035 can be read as "A non-blocking socket operation could not be completed immediately."

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

Re: Socket connection

Syamlal S Nair26-Dec-06 0:44

Syamlal S Nair

26-Dec-06 0:44

hi prasad,
sorry for the delay in sending this reply

It returns 0 means , connection is not succesful. How you know that it is succesful ?

the connection becomes successful when the server is listening( return value is 0 ), I can identify this, since the data send from server side(after connecting) reaches at client and vice versa.

How you are deciding it, as 0 return value is for failure.

Even if the server is not listening, it connects, I identified this since the OnConnect() which I have overrided gets invoked.

error code 10035 can be read as "A non-blocking socket operation could not be completed immediately."

That means the non blocking connection is possible, but it will take time

Am I right??

SYAMLAL

Re: Socket connection

prasad_som26-Dec-06 1:59

prasad_som

26-Dec-06 1:59

SyamlalS wrote:
the connection becomes successful when the server is listening( return value is 0 ),

But as connect is returning 0, its failing.

SyamlalS wrote:
Even if the server is not listening, it connects, I identified this since the OnConnect() which I have overrided gets invoked.

It will get called, for every connect called, but important thing is it should succeed. Which is not, in you case, I guess.

SyamlalS wrote:
That means the non blocking connection is possible, but it will take time

No.

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

Re: Socket connection

kasturi_haribabu25-Dec-06 22:34

kasturi_haribabu

25-Dec-06 22:34

status= connect(this->m_Socket,(sockaddr *)m_TargetSystem,sizeof m_TargetSystem));

if(status==SOCKET_ERROR)
{
int Error= this->GetPrevError();
}
else
{
// Smile | :)

Your socket got connected...
}

haribabu
(impossible to understand)

Re: Socket connection

Mark Salsbery26-Dec-06 6:33

Mark Salsbery

26-Dec-06 6:33

if (!MyAsyncSocket.Connect(...))
{
   int SockError = GetLastError();
   if (SockError == WSAEWOULDBLOCK)
   {
      // Check for error in OnConnect()
   }
   else
   {
      // Error occurred immediately - Not connected
   }
}

Call GetSockName() in OnConnect() if successful. Since you are getting WSAEWOULDBLOCK error
then the socket is not yet connected right after the call to Connect().

OpenFileMapping Fails

Gupta Suraj25-Dec-06 18:10

Gupta Suraj

25-Dec-06 18:10

Hi All,

OpenFileMapping

Fails with GetLastError() error code 2, i.e. ERROR_FILE_NOT_FOUND.

The problem is not frequent. It only occurs after few days of product being in production...Any help on this will be highly appreciated.

Thanks

Suraj Gupta

Re: OpenFileMapping Fails

prasad_som25-Dec-06 19:03

prasad_som

25-Dec-06 19:03

Gupta Suraj wrote:
Fails with GetLastError() error code 2, i.e. ERROR_FILE_NOT_FOUND.

Problem may not be with this function. As error suggests , its not getting mapping object. Which may not be created in first place.
Like , CreateFileMapping may have failed already.

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

Re: OpenFileMapping Fails

Gupta Suraj25-Dec-06 21:29

Gupta Suraj

25-Dec-06 21:29

Thanks for reply!

Yes, this could be one of the possibilities. I m working in that direction. Their is another direction to this, i.e. Can the error returned by OpenFileMapping can be misleading?

Suraj Gupta

Re: OpenFileMapping Fails

prasad_som25-Dec-06 21:33

prasad_som

25-Dec-06 21:33

Gupta Suraj wrote:
.e. Can the error returned by OpenFileMapping can be misleading?

Very unlikely. This API is there for such a long period. Could have caught any such failure already(and fixed).
In short, very unlikely.

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

user input in win32 application

ooolz25-Dec-06 17:29

ooolz

25-Dec-06 17:29

Hi,
I hv made an application using win32, heavy graphics r involved in my project...im facing difficulty displaying the dialog box n msg box..since it is not getin displayed on the leftmouse event at the first time..i-e i want that when i click the leftmouse button at some specific event a dialogbox shud appear...but when i click the mouse button dialogbox aint getin appeared as it goes at the back of my application..may b coz os aint givin it the control, n i hv to go to taskmanager n enable the dialogbox....so if some1 can find a cure for for this ill b extremely thankful....or tel me an alterante to get the user input..
Thnx

Re: user input in win32 application

prasad_som25-Dec-06 18:40

prasad_som

25-Dec-06 18:40

Can you show code ?