C / C++ / MFC

23-Jun-09 20:52

Hi,

How can i capture a Message/notification from a Child control which is again a child of another window. Window->Child->Child1. My question is how can i capture Child1's message in Window?

for me Window is the parent window of the application,
Child is a tab control,
Child1 is aedit control.

Birajendu
SonicWALL
Bangalore
India

Stuart Dootson23-Jun-09 21:40

23-Jun-09 21:40

Get Child to re-send Child1 messages to window?

Put in a WM_NOTIFY handler for Child1 in Child and forward all of those messages to Window. Add a WM_NOTIFY handler for Child in Window. Look at the hwndFrom member of the NMHDR part of the notification message to see which window originally sent the message.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

birajendu23-Jun-09 22:21

23-Jun-09 22:21

I wrote only messgae loop for parent window, can you tell me how i can incorporate message loop for child windows.

Birajendu
SonicWALL
Bangalore
India

«_Superman_»23-Jun-09 22:23

«_Superman_»

23-Jun-09 22:23

A message loop is the same irrespective of whether it is for a parent window or a child window or a window in another thread.

«_Superman_»
I love work. It gives me something to do between weekends.

birajendu23-Jun-09 22:47

23-Jun-09 22:47

Let me descrip my problem more precisely:

Window->Childwindow(Tab control)->ChildWindow1(edit control).

In windows message loop

{
case WM_NOTIFY:
{
switch(nmhdr->idFrom)
{
case IDC_MAIN_TREEVIEW: //childwindow's Id
switch(nmhdr->code)
{
//I am expeccting notify messages from ChildWindow1?
}

}

}
}

Please let me know weather i am doing correctly.?

Birajendu
SonicWALL
Bangalore
India

Stuart Dootson23-Jun-09 23:05

23-Jun-09 23:05

birajendu wrote:
In windows message loop

Do you mean in the message loop or in the WNDPROC for Window (I think it's the second one).

birajendu wrote:
//I am expeccting notify messages from ChildWindow1?

No - they get sent to the Tab control - which has a different WNDPROC. You need to subclass it so that you can process the window messages sent to it. See the message I previously posted about subclassing windows.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Stuart Dootson23-Jun-09 23:02

23-Jun-09 23:02

The message loop will handle all windows created on the thread it's in (a simplification, but close enough).

To modify the behaviour of the child windows, you need to subclass them, to handle messages sent to them differently than the default. I would suggest you read up about window subclassing - this[^] is a good starting point.

For example, to subclass a tab control created in your topmost window, you might use this to create and then subclass the control.

RECT rcCLient;
GetClientRect(hWnd, &rcCLient);
hwndTab = CreateWindow(WC_TABCONTROL, _T("tab"), WS_VISIBLE|WS_CHILDWINDOW, 0, 0, rcCLient.right, rcCLient.bottom, hWnd, 0, hInst, 0);
oldTabProc = (WNDPROC)::SetWindowLongPtr(hwndTab, GWLP_WNDPROC, LONG_PTR(&TabWndProc));

This next code fragment is my definition of a window procedure for the tab control that will forward notifications from an edit control contained inside it to the tab control's parent window. It's a bit evil, 'cause it uses a global for the tab control's old WNDPROC, but it illustrates the point.

WNDPROC oldTabProc;
LRESULT CALLBACK TabWndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
   if (message == WM_COMMAND && HWND(lParam) == hwndEdit)
      return ::SendMessage(GetParent(hWnd), message, wParam, lParam);
   return oldTabProc(hWnd, message, wParam, lParam);
}

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

birajendu24-Jun-09 1:30

How to redirect Telnet and Ftp in windows

24-Jun-09 1:30

Thanks a Lot. This served my purpose....

Birajendu
SonicWALL
Bangalore
India

ssm198411923-Jun-09 20:03

ssm1984119

23-Jun-09 20:03

I want to redirect Telnet and Ftp to my program.I have tried using pipe to redirect cmd.exe.All commands can be executed well except Telnet and Ftp commands.
Waiting for help!

Re: How to redirect Telnet and Ftp in windows

Stuart Dootson23-Jun-09 21:37

Re: How to redirect Telnet and Ftp in windows

23-Jun-09 21:37

Try to be a little more explicit - what erroneous behaviour are you seeing with Telnet and FTP?

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

ssm198411924-Jun-09 3:02

ssm1984119

24-Jun-09 3:02

Even the action of getting into the telnet mode is failed.
The correct answer should be the following:
C:>telnet 127.0.0.1
Telnet>
Telnet>

But mine is:
C:>telnet 127.0.0.1

C:>

Getting nothing!The same problem with ftp.

Re: How to redirect Telnet and Ftp in windows

Stuart Dootson24-Jun-09 3:08

convert wchar to CString&

24-Jun-09 3:08

It's probably because it's got no standard input connected on startup.

Also - you don't need a cmd.exe for telnet & ftp so long as you supply it with pipes for standard input and standard output. You can give it commands over standard input and gather output using standard output.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

GetActiveWindow

prithaa23-Jun-09 19:15

prithaa

23-Jun-09 19:15

Hello,

I have a class TableFrame

class TableFrame : public CMDIChildWnd
{
}

I have written the following code in MainFrame where OpenNewWindow function opens a new window and WhichNewWindow function gets the active window and calls the function of TableFrame.But I am not etting the pointer of TableFrame and STATIC_DOWNCAST gives Unhandled Exception.
How do I et the active window pointer of TableFrame.

void MainFrame::OpenNewWindow()
{
CMDIChildWnd* ChildPt = CreateNewChild(RUNTIME_CLASS(TableFrame),
TITLE_MachineOpHrs, m_hMDIMenu, NULL);
TableFrame* pF = STATIC_DOWNCAST(TableFrame,ChildPt);
}

void MainFrame::WhichNewWindow()
{
CWnd* p = GetActiveWindow();

TableFrame* pT = STATIC_DOWNCAST(TableFrame,p);

pT->Insert();
}

Thanks
Pritha

Re: GetActiveWindow

Naveen23-Jun-09 20:02

Naveen

23-Jun-09 20:02

prithaa wrote:
CWnd* p = GetActiveWindow();

GetActiveWindow return the pointer the currently active toplevel window. not a child of mdi window.

You should try
TableFrame* pT = (TableFrame*)GetActiveFrame();

nave

[OpenedFileFinder] [My Blog]

Re: GetActiveWindow

prithaa24-Jun-09 1:53

prithaa

24-Jun-09 1:53

thanks
got it

Rakesh523-Jun-09 18:59

Rakesh5

23-Jun-09 18:59

Hi,

i have a WCHAR variable and i need to pass it as an argument to a function which asks for CString&...

WCHAR buf[10];

void xxx::yyy(CString& rString)

i need to pass this buf in the place of rString...

can anyone help me to convert this?

Thanks,

Rakesh.

«_Superman_»23-Jun-09 19:21

«_Superman_»

23-Jun-09 19:21

If the function expects a CString, you should pass in a CString.
So simply create a CString variable and pass that in.

CString str;
xxx:yyy(str);

If you want the value in buf, you can later copy it.

«_Superman_»
I love work. It gives me something to do between weekends.

Rakesh523-Jun-09 19:36

Rakesh5

23-Jun-09 19:36

Hi Superman,

Thanks for your reply...

i actually want to read the content of a file...

If i use CString it is retrieving only the file name and not file content... rather if i use getbuffer() method, i think i can get the content..but its not accepting if i give like this xxx:yyy(str.getbuffer()) ..........it threw an error stating it cant convert wchar_t * to cstring&....

my doubt is this.. i need to copy the content of the file to that wchar variable as well as it should be passed into the function of type cstring&..

how can we do that sir?

Thanks,

Rakesh

Cedric Moonen23-Jun-09 20:10

Cedric Moonen

23-Jun-09 20:10

Rakesh5 wrote:
if i give like this xxx:yyy(str.getbuffer())

Arghh.... Never nevver use GetBuffer without having read the documentation of that function first. It doesn't make any sense to call this function here because the CString object already provides a cast operator to the same string type returned by the GetBuffer function. So, if passing the CString object directly is failing, calling the GetBuffer function will fail in the same way. Besides, doing that is really bad practice because this function is only inteded to get a way to access the internal buffer of the CString object, which is almost never needed (only in very rare conditions).

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Rajesh R Subramanian23-Jun-09 20:13

Rajesh R Subramanian

23-Jun-09 20:13

You *must* read the article pointed out by Cedric in his other reply to you.

It is a crappy thing, but it's life -^ Carlo Pallini

Cedric Moonen23-Jun-09 20:07

Cedric Moonen

23-Jun-09 20:07

Why are you using a WCHAR array instead of a TCHAR array in the first place ?
I suggest you read this article[^] first, to be able to understand the concepts. Things will probably be much clearer afterwards.

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Rakesh523-Jun-09 20:20

Rakesh5

23-Jun-09 20:20

Thanks Moonen..

I really appreciate your timely help...

Thanks,

Rakesh

Tabbed control from Win 32

Rajesh R Subramanian23-Jun-09 20:12

Rajesh R Subramanian

23-Jun-09 20:12

The function takes a reference to a CString object. You cannot, therefore, pass anything else to it. Please buy a book on C++.

It is a crappy thing, but it's life -^ Carlo Pallini

birajendu23-Jun-09 18:05