C / C++ / MFC Discussion Boards

bob1697231-Oct-06 10:56

31-Oct-06 10:56

A simpler sample would be to first create an app with the sample code in the appropriate places. In the OnDraw, draw a simple line, rectangle, or some drawing primitive with coordinates that fall within the documents bounding box that is defined in the sample.

Resize the window, do a print preview in portrait, landscape, set different paper sizes before the print preview, change the screen resolution. You'll see how the document always fits itself.

Then once you see what it's doing, then try putting the blitting code in the OnDraw. All the code that determines if your printing or not is in the OnPrepareDC method so you only need the code for the blitting in the OnDraw.

Re: Help! print issue

hongmuer1-Nov-06 15:50

hongmuer

1-Nov-06 15:50

Thank you very much
I will try to understand what you taught me and then more questions Smile | :)

Re: Help! print issue

hongmuer1-Nov-06 16:30

hongmuer

1-Nov-06 16:30

I added following codes in OnDraw function

	if(pDC->IsPrinting())<br />
	{<br />
<pre>pDC->SetMapMode(MM_ISOTROPIC);<br />
pDC->StretchBlt(100,-100,pDC->GetDeviceCaps(HORZRES),-pDC->GetDeviceCaps(VERTRES),<br />
		m_pMemDC,0,0, 6*m_nMaxX/5,m_nMaxY,SRCCOPY);<br />
</pre>}

and in OnPrepareDC function, codes has been added as follow:

	if(pDC->IsPrinting())<br />
	{<br />
<pre>pDC->SetMapMode(MM_ISOTROPIC);<br />
		<br />
int nPageWidth = pDC->GetDeviceCaps(PHYSICALWIDTH); <br />
int nPageHeight = pDC->GetDeviceCaps(PHYSICALHEIGHT); <br />
		<br />
CSize size = CSize(nPageWidth, nPageHeight); <br />
pDC->SetWindowExt(size);<br />
		<br />
pDC->SetViewportExt(pDC->GetDeviceCaps(HORZRES),-pDC->GetDeviceCaps(VERTRES));</pre><br />
}

Now, I can get the correct view in print preview!
Thank you very much!
By the way, I think I am still confused in print issue, such as mapping, the difference between the window and view, etc. Could you please recommend some literatures for me?

Re: Help! print issue

bob1697210-Nov-06 19:26

bob16972

10-Nov-06 19:26

Glad to hear it's working. Big Grin | :-D

As far as literature is concerned for mapping modes, viewports, etc...
I would have to say Ivor Horton does a superb job of taking anyone from A to Z. He goes through the process of building a drawing program in the second half of the book. The first half of the book is dedicated to C++ so the book is probably one of the best values out there.

For Visual C++ 6.0 (or 2003) get
Ivor Horton
Beginning Visual C++ 6

For Visual C++ 2005 get
Ivor Horton
Beginning Visual C++ 2005
(I flipped through this at the bookstore and it's basically the same as the previous book with some updates for 2005.)

VC++ MSN Client [modified]

priyank_ldce31-Oct-06 5:40

priyank_ldce

31-Oct-06 5:40

Hi,
I am trying to make MSN client using VC++.NET. I am using socket for this. But I get “WSAETIMEDOUT (10060) Connection timed out ” error when I am connecting to messenger.hotmail.com server at port number 1863. Can I know what is wrong with this code? Thanks in advance. Priyank

WORD version;
	WSADATA wsaData;
	int rVal=0;

	version = MAKEWORD(1,1);
	WSAStartup(version,(LPWSADATA)&wsaData);

	LPHOSTENT hostEntry;

//store information about the server

hostEntry = gethostbyname("messenger.hotmail.com");
	if(!hostEntry)
	{
		::MessageBox(NULL,"Failed gethostbyname()","Test",MB_OK);
		return false;
	}

//create the socket

SOCKET theSocket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);

	if(theSocket == SOCKET_ERROR)
	{
		::MessageBox(NULL,"Failed socket()","Test",MB_OK);
		return false;
        }

//Fill in the sockaddr_in struct

SOCKADDR_IN serverInfo;
	serverInfo.sin_family = AF_INET;
	serverInfo.sin_port = 1863;
	serverInfo.sin_addr = *((LPIN_ADDR)*hostEntry->h_addr_list);
	rVal=connect(theSocket,(LPSOCKADDR)&serverInfo,sizeof(serverInfo));
	if(rVal==SOCKET_ERROR)
	{
		int errCode = ::WSAGetLastError();
		::MessageBox(NULL,"Failed connect()","Test",MB_OK);
		return false;
	}

	closesocket(theSocket);
	WSACleanup();
	MessageBox(NULL, "Connection was made", "SOCKET", MB_OK);

-- modified at 11:52 Tuesday 31st October, 2006

Re: VC++ MSN Client

Mark Salsbery31-Oct-06 5:49

Mark Salsbery

31-Oct-06 5:49

priyank_ldce wrote:
serverInfo.sin_port = 1863;

try
serverInfo.sin_port = ::htons(1863);

Re: VC++ MSN Client

priyank_ldce31-Oct-06 5:57

priyank_ldce

31-Oct-06 5:57

Thanks it works Big Grin | :-D

Mmm n00b question about File I/O

Anthony Mushrow31-Oct-06 5:19

Anthony Mushrow

31-Oct-06 5:19

Well, i finnaly got the app to read from a file, anyways, it only reads up to a space, then it stops (unless you read from the file again, in a loop or something - of course each time its like a new line)

Anyways, im sure y'all already know that, and you may have guessed the question, how do a read a whole line upto an newline constant of some kind, rather that a space?

Re: Mmm n00b question about File I/O

David Crow31-Oct-06 5:23

David Crow

31-Oct-06 5:23

The Undefeated wrote:
...how do a read a whole line upto an newline constant of some kind, rather that a space?

Use the getline() method.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Mmm n00b question about File I/O

Anthony Mushrow31-Oct-06 6:31

Anthony Mushrow

31-Oct-06 6:31

That'd do it, thanks. Didn't i tell you it was an easy question.

Re: Mmm n00b question about File I/O

toxcct31-Oct-06 5:25

toxcct

31-Oct-06 5:25

use std::ifstream::getline()

You don't know where to start ? ask a good friend

[VisualCalc 3.0][Flags Beginner's Guide]

Help!(something about the pointer)

wanlim081731-Oct-06 5:18

wanlim0817

31-Oct-06 5:18

Thanks for you help at first!
I'm a chinese student and my english isn't very well! A I really want your can give me some help on my english and computer courses(I'm very interesting in Visual C++)!
I'm a tenderfoot about C++ language!
I'm confusing by the question as follows:
there is parts of my code:
int a=10;
int* ap=&a;
char c='b';
char* cp=&c;
when I want to get the vaule of the Pointers point to;
cout<

Re: Help!(something about the pointer)

Anthony Mushrow31-Oct-06 5:22

Anthony Mushrow

31-Oct-06 5:22

Yeah, i got garbage as well, except i had a whole array of chars (an entire 7) to get round the problem, i had to write out each character at a time, a bit much effort really

Re: Help!(something about the pointer) [modified]

toxcct31-Oct-06 5:33

toxcct

31-Oct-06 5:33

you get garbage values after the character 'b' because the operator << is overloaded for a code char* parameter, to be a C-style string.
such a string is supposed to be NUL terminated (with '\0'), so it read from the beginning (the 'b' character) until it finds a '\0' character in the memory after the 'b', even if it is not yours.

if you want to see the address of the pointer, do this :

cout << (const void*)cp;

-- modified at 12:01 Tuesday 31st October, 2006

You don't know where to start ? ask a good friend

[VisualCalc 3.0][Flags Beginner's Guide]

Re: Help!(something about the pointer)

David Crow31-Oct-06 5:36

David Crow

31-Oct-06 5:36

wanlim0817 wrote:
...Is there some differences between the int* type and cahr* type?

Of course. One points to an int and the other points to a char.

wanlim0817 wrote:
And why there are some garbage gets when I use "cout<<cp"!< blockquote="">

Did you look to see what << operator was being called?
cout << (const void *) cp;
"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

const or not ?

toxcct31-Oct-06 5:41

toxcct

31-Oct-06 5:41

David, just a personal wondering, but here, is there a reason to use (const void*) more than the non-const (void*) cast ?

i don't see anything serious, so maybe you could light me up...

You don't know where to start ? ask a good friend

[VisualCalc 3.0][Flags Beginner's Guide]

Re: const or not ?

David Crow31-Oct-06 5:57

David Crow

31-Oct-06 5:57

toxcct wrote:
...is there a reason to use (const void*)...

It matches the method's signature.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: const or not ?

toxcct31-Oct-06 5:59

toxcct

31-Oct-06 5:59

obviously

I didn't think that far. thanks

You don't know where to start ? ask a good friend

[VisualCalc 3.0][Flags Beginner's Guide]

NMAKE error

mmhu31-Oct-06 5:15

mmhu

31-Oct-06 5:15

I always receive following error when compile the win32 vs project written in C. But I checked the makefile and couldn't find any variable at the left of the equal sign is not defined.

Any suggestions???

------ Rebuild All started: Project: f1, Configuration: Debug Win32 ------

Performing Makefile project actions
Microsoft (R) Program Maintenance Utility Version 7.10.3077
Copyright (C) Microsoft Corporation. All rights reserved.
NMAKE : fatal error U1063: missing macro name before '='
Stop.
Project : error PRJ0019: A tool returned an error code from "Performing Makefile project actions"

Re: NMAKE error

David Crow31-Oct-06 5:40

David Crow

31-Oct-06 5:40

Can you whittle the makefile down to just the lines necessary to reproduce the problem? Is the macro name being complained about itself a macro that expands to nothing?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Get and set file date and time

Wim Engberts31-Oct-06 5:15

Wim Engberts

31-Oct-06 5:15

Hi all,

I am using a CFile class to work with a file and I would like it to retain its original date and time setting. I obviously forgot what to use to get and set the date and time of a file. Pease help (I seem to remember that I should not use the CFile class itself but maybe do something with CFileFind; however this gets a file date and time, but does not set it)

Thanks in advance,
William

Re: Get and set file date and time

David Crow31-Oct-06 5:25

David Crow

31-Oct-06 5:25

Why are you not using CFile::SetStatus()?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

"Judge not by the eye but by the heart." - Native American Proverb

Re: Get and set file date and time

Wim Engberts31-Oct-06 5:27

Wim Engberts

31-Oct-06 5:27

Thanks,

That was indeed the one I forgot about.

Regards,
William

Can I add a menu item to the popup menu of any CEdit?

ThatsAlok31-Oct-06 4:31

ThatsAlok

31-Oct-06 4:31

Hi All,
I just in between of a project.. i need to add some menuitem in the default cut,copy,paste menu.. but problem is that i am not able to get Handle to the Menu so that.. i can add my new sub item...
Could someone give me some pointer to solve this problem.. in brief i want to extend the default Right Click Cut,Copy,Paste menu which come when you right click on any EDIT Box in unmanaged VC++

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief And You

Re: Can I add a menu item to the popup menu of any CEdit?

Hamid_RT31-Oct-06 4:50

Hamid_RT

31-Oct-06 4:50

I know your problem and I think I saw an example that insert items to right click on editbox but i dont know its on www.codeproject.com or www.codeguru.com I search for it if I found I reply to you Smile | :)

WhiteSky

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