C / C++ / MFC

Re: Resizing text for display

4-Nov-04 23:35

I want to put some text on a dialog.

I can either size my text to the dialog or size my dialog to the text. Can anyone tell me how to do this?

I think I will get some text passed to a function. I will then have to format the text into a number of lines with carriage returns and then I will have to create a window large enough to display the text.

So I need to be able to get the size of the text once formatted. How may I do this? Is there a way I can find the screen size of text?

John R. Shaw5-Nov-04 11:10

John R. Shaw

5-Nov-04 11:10

Well first you'll need to figure the size of the rectangle your text will need to be displayed. You can use one of the text extent function like GetTextExtent(). The problem you will run into here is that the extent function will treat the string as one line, therefor you'll have to call it on a line by line bases. Note that each line my actualy have a different height (based on the characters they contain).

Width = widest line.
Height = tallest line.

From there it should not be to difficult recalculate the dialog size in the OnSize() function.

If you did not want to adjust the size of the dialog box: You could use the above method to see it will fit as is. If it will not fit you could try using GetFont() to retreive the current font (so you don't change selected font type) and the information to create a smaller font that may fit (recalculate and repeat until needed size is reach). Note: You might have to change the font type if this does not work.

I recomend that you look at one of the resizable dialog articles to help you decide what method to use (and how to resize a dialogbox).

Depending on why you need to do this you could just use a mult-line edit control, set to read only, and just copy the text to that.

Good Luck!

INTP

plz help....newbie here.....:confused:

namaskaaram4-Nov-04 23:14

namaskaaram

4-Nov-04 23:14

my prob is that i have a dialog type vc++ application named 'Xyz'.....in this....i have created my own class(CMyclass).....what i want to know is that how shall i can access data of the CXyzDlg class from the CMyclass.....

please help...... Cry | :((

vilmer5-Nov-04 2:04

vilmer

5-Nov-04 2:04

just put a #include "CXyzDlg.h" statement in your CMyClass.h file
Wink | ;)

namaskaaram7-Nov-04 18:29

namaskaaram

7-Nov-04 18:29

thanx!!!!! Smile | :)

....

John R. Shaw5-Nov-04 11:33

John R. Shaw

5-Nov-04 11:33

That depends on how you need to use CMyclass.

Is CMyclass only used by the dialog?

// In header file
#include "CMyclass"
class CMyDialog
{
    //.....
    CMyclass m_myclass;
};

// In source file
void CMyDialog::func()
{
   m_myclass.func();
}

Is CMyclass a globaly declare object (declared some where else)?

// In source file
#include "CMyclass"
extern CMyclass g_myclass; // diclared in anouther source file.

void CMyDialog::func()
{
   g_myclass.func();
}

Good Luck!

INTP

Adding Scrollbars to a Non Scrollbar CView project.

namaskaaram7-Nov-04 18:29

namaskaaram

7-Nov-04 18:29

thanx!!!!!....
tis helped me....

Per Svedensten4-Nov-04 23:14

Per Svedensten

4-Nov-04 23:14

When I started a Single-document project 3 years ago I didn't think scrollbars would be needed so I didn't select it in the AppWizard. Resently the need for scrollbars in the main window have arrisen and I can't get it to work. I have tried to change it but the scrollbars just returns to zero when I try to use them. So has anybody done this with success? Please let me know!
I do not want to start the project all over just to add scrollbars, think that will take me more then a week....

Re: Adding Scrollbars to a Non Scrollbar CView project.

Cedric Moonen5-Nov-04 2:39

Cedric Moonen

5-Nov-04 2:39

I'm not sure if this will work Unsure | :~

Replace all occurences of CView by CScrollView in your CView derived class.

Re: Adding Scrollbars to a Non Scrollbar CView project.

Per Svedensten5-Nov-04 3:37

Per Svedensten

5-Nov-04 3:37

Tried that already and it doesn't work. Thanks anyway!

Re: Adding Scrollbars to a Non Scrollbar CView project.

Cedric Moonen5-Nov-04 4:07

Cedric Moonen

5-Nov-04 4:07

Don't forget to call at startup (for example in OnInitialUpdate of your view class) the function SetScrollSizes.

Normally I think this should work... Unsure | :~

How to transfer speech via TAPI

Wahaj Khan4-Nov-04 23:13

Wahaj Khan

4-Nov-04 23:13

Hi I urgently need a simple TAPI application in visual C++ that can dial number. On receiving the number, some speech needs to be transfered. I need Visual C++ code in TAPI 3.0 that can transfer speech on the calling (Dialing) number on receiving call.

Thanks from wahaj Khan

Re: How to transfer speech via TAPI

Vikrant for VC++5-Nov-04 0:16

Vikrant for VC++

5-Nov-04 0:16

Browse to ftp://ftp.microsoft.com/devloper/tapi

Winsock - Chat Problem

Anonymous4-Nov-04 21:13

4-Nov-04 21:13

Hi out there,

I have a strange problem:

I coded a simple Client-Server chat app! It works wonders. The way it works:

The server is a multithreaded app. It waits for incoming connections and if found, start a new thread. There, in an endless loop, it waits for messages.
The Client: It connects to the server, sends its name, so that the server knows who is online. This name will be written down in a lookuptable together with the IP and the socket.
If someone writes a message, the message looks like this: "ToName0FromName: Message". So the server checks if ToName is online, through the lookuptable, and if he is, sending him the Message (after the 0).

Now my problem:

Both clients connect. One starts sending messages. The other one receives them. If the other one sends a message, the first client does receive it. But every following message wont reach the first client. No error messages, nothing. It seems the server doesnt get the message. But, Sending doesnt give any errors, and I checked, and the client is still connected to the server...
If I disconnect this client and connect again, the same thing happens, but the other way around. so the first client cant send, but not the second!

What can this be?
I read alot of papers, and tried alot, but I am still confused!
It would be so nice if you could help me!

DKT

vilmer5-Nov-04 2:25

vilmer

5-Nov-04 2:25

Hi,
I suggest you to try to debug your application with some watches on the receiveing buffer of the server sockets. What do you mean with "in an endless loop the server waits for messages"? Isn't the server app in idle state?
I was wondering if you used CAsyncSocket class...
D'Oh! | :doh:

Anonymous5-Nov-04 2:54

5-Nov-04 2:54

No I am not debugging, changing the active setting to debugging means, I wont be able to debug the app, cause MFC doesnt want to work with threads properly!

With endless loop I mean something like:

while(true)
{
recv(...)
if error break
if done break
else show message
}

No. I am not using this function. I am just listening on a specific port and waiting for incoming connections, if found, start a new thread for it where this loop comes!

DKT

thercio5-Nov-04 8:02

thercio

5-Nov-04 8:02

You may lost some data packets in the server side.

Try to use this thinking:

while(TRUE)
{
select(); // to get socket status
if (SOCKET_ERROR)
{
//deal with the error
//WSAGetLastError() must be called
}
if (TOUT)
{
continue;
}

recv();// after that, you are ready to read some data, because select() was signaled to do something.

}

Anonymous7-Nov-04 21:49

7-Nov-04 21:49

Ok, thats fine. I didnt know about select!

Now I get an error code 10022 which means:

"WSAEINVAL
(10022)
Invalid argument.
Some invalid argument was supplied (for example, specifying an invalid level to the setsockopt function). In some instances, it also refers to the current state of the socket—for instance, calling accept on a socket that is not listening."

Now my question. Where didnt I pass the right arguments? I dont use SetSockOpt. I called the select directly after accepting an incoming conncetion, so, before going into the thread! Accept doesnt give any errors. And I know it works, cause I can send msgs.

This is what my accept looks like, or better the whole code up to accept:

if(WSAStartup(MAKEWORD(1,1),&wsaData)!=0)
MessageBox(TEXT("Initialize"), TEXT("Error!"), MB_OK);
local.sin_addr.s_addr=INADDR_ANY;
local.sin_family=AF_INET;
local.sin_port=htons(20248);

if((server_s=socket(PF_INET, SOCK_STREAM, IPPROTO_TCP))==INVALID_SOCKET)
MessageBox(TEXT("SocketCreation"), TEXT("Error!"), MB_OK);

if(bind(server_s, (PSOCKADDR)&local, sizeof(local))==SOCKET_ERROR)
MessageBox(TEXT("Binding"), TEXT("Error!"), MB_OK);

if(listen(server_s, 10)!=0)
MessageBox(TEXT("Listening"), TEXT("Error!"), MB_OK);
else
{
m_con_s="- Connected -";
UpdateData(false);
connect_b=true;
}

while(true)
{
fromlen=sizeof(from);
if((client_s=accept(server_s, (struct sockaddr*)&from, &fromlen))==INVALID_SOCKET)
{
wsprintf (szError, TEXT("Accepting Connections. Error: %d"),
WSAGetLastError ());
MessageBox(szError, "Accepting Connections:", MB_OK);
break;
}
else
if(select(0,0,0,0,0)==SOCKET_ERROR)
{
wsprintf (szError, TEXT("Error: %d"),
WSAGetLastError ());
MessageBox(szError, "Status of Con.", MB_OK);
break;
}
}

Thanks so far!

DKT

Anonymous7-Nov-04 23:32