C / C++ / MFC

16-Jul-03 3:52

Yeah, and when you figure it out, think about writing an article to post. That would be cool Cool | :cool:

It shouldn't be too difficult, but will depend on the shape you're working with. If you're dealing with a polygon, you can calculate the distance out of the box for each point, and scale all the points so that the furthest one fits in the box. Sounds complex, but I don't think it is really, just takes a bit of thought Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Pipes and Child Process

anqin15-Jul-03 7:26

anqin

15-Jul-03 7:26

Hi, is there anybody can help me on my problem of pipes and process. I create two pipes for stdin, stdout/stderr, and CreateProcess a cmd.exe. After entering "exit" to the pipe, cmd.exe terminates. But the parent process does not know the child has terminated. It can read characters from the pipe and WriteFile to the pipe of the child. Of course, there is no reading from the other pipe from the child. So, the information loop is deadlocked. Is there any way to know the child terminates? I know in UNIX, once the child close the pipe, the parent will receive a signal when it reads/writes to the pipe. How about Windows? I am new to Windows. Confused | :confused:

Please reply me by email. Thank you in advance!

Qin An (anqin@leadinghr.com)

Download ActiveX

Anonymous15-Jul-03 5:33

Anonymous

15-Jul-03 5:33

Hi,
does anybody know how to download ActiveX from Apache Server and not from IIS. What should be the HTML Script and where should I put the ActiveX (dll) on Apache Server.
thanks

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer15-Jul-03 5:44

15-Jul-03 5:44

This really isn't the right forum for this question, but we're forgiving here...
Doing it twice risks the Wrath Of BOB!

As the ActiveX control is run client side, it really makes no difference which
web server you use. From the server point of view, it is a file delivered
using the HTTP protocol. No different to an HTML page, jpeg, or gif.

So use the same HTML for either server, and put the control in the equivalent
place on either server.

Iain.

Ryan Binns15-Jul-03 5:52

15-Jul-03 5:52

Iain Clarke wrote:
we're forgiving here

Suspicious | :suss:

Really?

Iain Clarke wrote:
Doing it twice risks the Wrath Of BOB!

Big Grin | :-D

Perhaps you could have told him the Web Development forum is more appropriate Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer15-Jul-03 6:11

15-Jul-03 6:11

Iain Clarke wrote:
we're forgiving here
Ryan Binns wrote:
Suspicious | :suss:

Really?

OK, I'm forgiving. Not like Mr Binns. He's no help to anyone! Wink | ;)

Iain Clarke wrote:
Doing it twice risks the Wrath Of BOB!

We need a Green Alien | [Alien]

smiley... And one with a pitchfork...

Perhaps you could have told him the Web Development forum is more appropriate.

Nah. I'm not that helpful!

Iain.

Ryan Binns15-Jul-03 14:44

Is there any way to get this to work CString???

15-Jul-03 14:44

Iain Clarke wrote:
Not like Mr Binns. He's no help to anyone!

Absolutely. I never help anybody. Muahahaha :evil-smiley:

Roll eyes | :rolleyes:

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

johnstonsk15-Jul-03 4:31

Re: Is there any way to get this to work CString???

15-Jul-03 4:31

I know I have been stuck on the same problem for the last few days but, I have to get this to work or my rpogram won't function correctly. Like I need it to.

I am using the getline() function to read in a file. I need to put the first word on each line in a char array.

	<br />
		string name, unit,min,max,value;	<br />
<br />
                for(int i=0; i<45; i++){<br />
			getline(fin, name, ',');<br />
			<br />
			if(name == "STOP")<br />
				break;<br />
			getline(fin, unit, ',');<br />
			getline(fin, min, ',');<br />
			getline(fin, max, ',');<br />
			getline(fin, value);<br />
			<br />
		    cout<<endl<<name<<"\n";<br />
			strcpy(TSimHeader_arr[0].Name, (char*)name.c_str());<br />
                        strcpy(TSimHeader_arr[0].Name, name); <br />
			strcpy(TSimHeader_arr[0].Name[i],name.c_str());<br />
			//strcpy(sHeader.Unit[i],unit.c_str()); <br />
			//(char)strcpy(TSimHeader_arr[0].Name[i], name);<br />
			//(char)strcpy(TSimHeader_arr[0].Unit[i], unit);<br />
			//TSimHeader_arr[0].Min[i]   =  atof(min.c_str());<br />
			//TSimHeader_arr[0].Max[i]   =  atof(max.c_str());<br />
		    TSimSignal_arr[0].Value[i] =  atof(value.c_str());<br />
			<br />
		<br />
			cout<<endl<<"names......."<<"\n"<<TSimHeader_arr[0].Name[i];<br />
			//printf("%s",TSimHeader_arr[0].Name[sig_count]);<br />
<br />
			<br />
			sig_count ++;<br />
		<br />
		}

All of the above are ways that I have tried. I don't get the correct word put in the char array.

I know the words are getting read in from the file correctly.

They are just not getting put in the char[] correctly.

Is there another way that I could go about doing this?
Is this the best wat to read in a file and put the words in a char[]?

I have to use a char[] because of certain requirements that my boss has given me.
I would love to use a vector, but it won't work

Thanks for your help,
Steven

Ryan Binns15-Jul-03 5:05

Re: Is there any way to get this to work CString???

15-Jul-03 5:05

If I remember your structure correctly, the first strcpy() method will work (you don't need the cast, though):

strcpy(TSimHeader_arr[0].Name, name.c_str());

What won't work is the method you're using to print it out:

cout<<endl<<"names......."<<"\n"<<TSimHeader_arr[0].Name[i];

You need to print out what you store to:

cout<<endl<<"names......."<<"\n"<<TSimHeader_arr[0].Name;

Your version was only printing one character, right?

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

johnstonsk15-Jul-03 5:21

Re: Is there any way to get this to work CString???

15-Jul-03 5:21

You are right it was only printing ouot 1 character.

But, if later on I need to access the array of names and get Names[15] how can I do that?

I just tried to print out TSimHeader_arr[0].Names[15] and it printed out <null>

Are the words getting put in the char Names[]?

Sorry, but I just don't quite understand.

Thanks, Steven

Ryan Binns15-Jul-03 5:48

Re: Is there any way to get this to work CString???

15-Jul-03 5:48

At their core, strings are an array of characters. The string "Hello" has 5 characters (plus a terminating NULL character), so it will need a 6-character array.

Your Names array is declared as char Names[45], which means that it holds 45 characters, ie one string that can be up to [edit]44[/edit] characters long. If you are wanting to store more than one string, this won't work - an array of chars can only store one string.

To store multiple strings you'll need to use a 2-dimensional array - an array of arrays of characters (think about it, it does make sense Smile | :)

)

I think you're wanting to store 45 strings. If each string is at most 10 characters long, then you'll need to declare Names as

char Names[45][11];

This is an array that holds 45 arrays of 11 characters, ie. it holds 45 strings that are up to 10 characters long each (remember the terminating NULL?). You'll have to work out how big to make the arrays to fit your strings (change the 11 to whatever is necessary to fit the string in). To write to these strings, use the code

strcpy(TSimHeader_arr[0].Names[0], name.c_str());
strcpy(TSimHeader_arr[0].Names[1], name.c_str());
// etc...
strcpy(TSimHeader_arr[0].Names[44], name.c_str());

To display the strings, use

cout << TSimHeader_arr[0].Names[0] << endl;
cout << TSimHeader_arr[0].Names[1] << endl;
// etc...

Hope this helps,

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

johnstonsk15-Jul-03 6:11

Re: Is there any way to get this to work CString???

15-Jul-03 6:11

Ryan,
That makes sense. Which would take up less space an array of

char Names[45][10] or string[45]?

I am trying to use the least amount of space.

Thanks,
Steven

David Crow15-Jul-03 7:34

David Crow

15-Jul-03 7:34

Names will be 450 bytes. I'm not sure about string as I don't use them. What does sizeof() report?

Re: Is there any way to get this to work CString???

John M. Drescher15-Jul-03 7:59

John M. Drescher

15-Jul-03 7:59

johnstonsk wrote:
Which would take up less space an array of

char Names[45][10] or string[45]?

string[45] would take a lot more space because of how it allocates the strings but since the data set is soooooo small I would not worry about this at all.

Anyways it should be
char Names[45][11]

because you need 1 extra space for the '\0' character that terminates strings. Otherwise your strings would only be able to hold 9 characters...
John

Re: Is there any way to get this to work CString???

Ryan Binns15-Jul-03 14:40

Re: Is there any way to get this to work CString???

15-Jul-03 14:40

The first one uses less memory.

Are you wanting to transmit the information across a serial port or network of something like that? If you are, you can't use the second one - string internally stores the text as a pointer, so if you transmit it, you just transmit the pointer, not the text it points to. In this case, you'll have to use the first option. Just remember to increase your array size to fit your string in Smile | :)

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

johnstonsk15-Jul-03 15:20

Re: Is there any way to get this to work CString???

15-Jul-03 15:20

Yes, I have a PCI card with a gig of memory that is shared with 5 other machines.

Some of the words are longer than others so, if I just make the 2nd dimension the size of the longest word will I have any problems reading them on the other side of the network?

thanks,
Steven

Shay Harel15-Jul-03 7:54

Shay Harel

15-Jul-03 7:54

why not just to read it and stick it into a CStringArray ?

You already have it as part of MFC..

CStringArray myarray;
myarray.Add (StringFromFile);

that's it.

Re: Is there any way to get this to work CString???

John M. Drescher15-Jul-03 8:03

John M. Drescher

15-Jul-03 8:03

One other thing this is not a CString. CString is a class in MFC and ATL/WTL to handle strings..

John

Registry values of an external PC

Anonymous15-Jul-03 4:21

Anonymous

15-Jul-03 4:21

By using the commands 'RegCreateKeyEx', 'RegSetValueEx' and 'RegQueryValueEx' you have only access to your own PC.

I wont to read the registry values of an external PC which is on the same network linked.

Is there somebody who has an idea?

Re: Registry values of an external PC

basementman15-Jul-03 4:27

basementman

15-Jul-03 4:27

See RegConnectRegistry in the doc.

onwards and upwards...

Adjusting the overall contrast and brightness

oliver.hu15-Jul-03 4:19

oliver.hu

15-Jul-03 4:19

Hi,

I'm developing a color calibration application under WindowsXP with Visual C++ and MFC. I would like to have a dialog box where the user can adjust the screen's overall contrast and brightness.

The first solution would be to control it with some SDK API calls, but I don't really know how I should do it. I've tried to get the desktop's dc and use the SetColorAdjustment( ) with it, but it doesn't really work.

Then I've read about the VESA DDC/Ci standard which makes it possible to actually control the monitor from the software but the Win32 API doesn't provide an interface for this. (If you know some info about it which might be helpful that would be the best).

I'd appreciate if someone could provide some info on these things.

Thanks in advance
Oliver

Re: Adjusting the overall contrast and brightness

Ryan Binns15-Jul-03 5:08