Re: Please vote for those who are helpful - C / C++ / MFC Discussion Boards

How to limit a zone of scrolling of the View?

Eugene Pustovoyt23-Oct-01 20:25

23-Oct-01 20:25

I have the class based from CScrollView! How to make so that scrolling it was carried out not in all window, but only in any part!
For example, I want to place not scrolled heading to the top of View! OMG | :OMG:

Re: How to limit a zone of scrolling of the View?

Christian Graus23-Oct-01 20:39

Christian Graus

23-Oct-01 20:39

Capture WM_SCROLL and then don't pass the message on if the values fall outside the area you want.

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Re: How to limit a zone of scrolling of the View?

Tomasz Sowinski23-Oct-01 23:31

Tomasz Sowinski

23-Oct-01 23:31

The device context you're receiving in CYourView::OnDraw is prepared to draw using coordinates altered by current scrolling position. If you want top part of your view to remain top regardless of the scrolling, you have two options:

1) draw the top part not at the (0, 0) coords, but at the position returned by GetScrollPosition - this should be the top-left corner of visible area (I'm assuming that you're running in MM_TEXT mode).

2) use other device context for top part of the view in OnDraw - just declare a CClientDC. Draw at (0, 0).

Tomasz Sowinski -- http://www.shooltz.com

Re: How to limit a zone of scrolling of the View?

Eugene Pustovoyt23-Oct-01 23:54

Eugene Pustovoyt

23-Oct-01 23:54

Basically such it is possible! Whether it is possible to make the size scroll bar, only on height of a scrolled part! If yes that as! Roll eyes | :rolleyes:

Re: How to limit a zone of scrolling of the View?

Tomasz Sowinski23-Oct-01 23:59

Tomasz Sowinski

23-Oct-01 23:59

So you want scrollbars to start not at the top of the window, but in lower part? In such case, simply create two views - one for the top part, without the scrolling and one derived from CScrollView for the bottom part. You can combine two views with CSplitterWnd or you can handle frame resizing yourself - in such case, the top part's size could remain fixed and user would be unable to resize it.

Tomasz Sowinski -- http://www.shooltz.com

Re: How to limit a zone of scrolling of the View?

Eugene Pustovoyt24-Oct-01 0:18

Eugene Pustovoyt

24-Oct-01 0:18

Thank you!

I shall try!

Eugene Pustovoyt

Please vote for those who are helpful

Chris Maunder23-Oct-01 18:04

Chris Maunder

23-Oct-01 18:04

You may notice that if you are logged on, and are viewing messages posted by others that are logged on that there is now a 'This Helped!' link at the bottom right-hand side of the message.

It's a great way of saying 'thanks' and gives us the opportunity, should it be a success, of handing out some prizes to those who help others.

If someone answers one of your questions and is helpful, please do them a favour and click on that link. It opens up a small separate window so your viewing won't be interupted.

cheers,
Chris Maunder (CodeProject)

Re: Please vote for those who are helpful

Christian Graus23-Oct-01 18:20

Christian Graus

23-Oct-01 18:20

Cool - there's prizes ?

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Re: Please vote for those who are helpful

Chris Maunder23-Oct-01 18:43

Chris Maunder

23-Oct-01 18:43

That's the plan, but if it's abused then there is no point.

The whole thing is designed to encourage readers to help each other out and to give you the chance to pat each other on the back.

cheers,
Chris Maunder (CodeProject)

Re: Please vote for those who are helpful

23-Oct-01 22:46

I think its already being abused.

look who is at number 1 spot.

Nish BusterBoy, Who has he helped !!!!

Re: Please vote for those who are helpful

Tomasz Sowinski23-Oct-01 23:36

Tomasz Sowinski

23-Oct-01 23:36

As somebody mentioned earlier, Nish must have large family Big Grin | :-D

Tomasz Sowinski -- http://www.shooltz.com

.BSC file format

Romeozulu23-Oct-01 15:49

Romeozulu

23-Oct-01 15:49

Can some point me to some documents or website that describes the MSDEV .bcs file format? I want to genertate my own to be read my CodeWrite from a custom langauge.

Thanks,

RZ

Re: .BSC file format

Michael Dunn23-Oct-01 21:21

Michael Dunn

23-Oct-01 21:21

I'm pretty sure MS has an SDK for dealing with .BSC databases, but I've tried a few searches and can't find it now. Check around the MS Visual Studio site, maybe you'll have better luck than me.

--Mike--
http://home.inreach.com/mdunn/
This posting is provided "as was" with no warranties, guarantees, lotteries, or any of those little bags of peanuts you get on planes. You assume all risk for crossing the street without holding mommy's hand. © 2001 Mike's Classy Software. Member FDIC. If rash develops, discontinue use.
Heart | [heart]

your

with

and

Re: .BSC file format

Tomasz Sowinski23-Oct-01 23:57

Tomasz Sowinski

23-Oct-01 23:57

KB article Q153393 has links to 'Browser Toolkits' for all versions of VC++.

Tomasz Sowinski -- http://www.shooltz.com

Re: .BSC file format

Romeozulu24-Oct-01 5:18

Romeozulu

24-Oct-01 5:18

Thanks this was very useful. Unfortunately, the SDK does not allow writing new information to the .bsc file, just reading a searching it (unless I'm missing something obvious). They supply a .dll that does all the reading, so the file format is still a mystery. What I need to do is create .bsc files.

Thanks, RZ

MDI question

23-Oct-01 15:36

Hi,

can you help please a newbie how to
1.maximize a view
2.set one of views to the foreground

in an MDI app. Confused | :confused:

Thanks

Pe

Re: MDI question

Christian Graus23-Oct-01 16:25

Christian Graus

23-Oct-01 16:25

1. In the view GetParentFrame()->ShowWindow(SW_SHOWMAXIMIZED);

2. I'm guessing in the view do the abvoe with SW_SHOW, or use the same technique to get a HWND to call SetWindowPos on.

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Re: MDI question

Tomasz Sowinski24-Oct-01 0:03

Tomasz Sowinski

24-Oct-01 0:03

If by 'view' you mean MDI child frame, this is the way to go:

1) MDIMaximize

2) MDIActivate

Both methods are available from CMDIChildWnd (this is the base class for CChildFrame) and CMDIFrameWnd (the base for CMainFrame).

Tomasz Sowinski -- http://www.shooltz.com

overloaded operator +

23-Oct-01 15:30

I have this code but need to be able to concatinate the two strings passed in using the overloaded + operator function. Help.
#include "myString.h"
#include <iostream.h>
#include <string.h>

myString::myString() // default constructor
{
length = 0;
stringData = new char[1];
}

myString::myString(char *A) //conversion constructor
{
length = strlen(A);
stringData = new char[length];
for (int I=0;I<length;i++)
{
="" stringdata[i]="A[I];
" };
}

void="" mystring::show()="" shows="" the="" converted="" string
{=""
="" for="" (int="" i="0;I" <="" length;i++)
="" cout="" <<="" stringdata[i];
="" endl;
};

int="" mystring::lengthof()="" returns="" length="" of="" return="" (length);
};

mystring="" operator+(mystring="" a,mystring="" b)
{

="" (a);

}

ostream="" &operator<<(ostream="" &a,="" mystring="" &b)="" done
{
="" a="" b.stringdata="" endl;
="" a;

="" for(int="" b.length;="" i++)
="" a<<="" b.stringdata[i];
="" };
="" a;
};

istream="" &operator="">>(istream &str_in, myString & d)
{
cout << "Enter string: ";
str_in.getline(d.stringData,32000);
//cout << "Enter string 2: ";
//str_in.getline(d.stringData,32000);
//str_in.get();
return(str_in);

};

void main()
{

myString string1;
myString string2;
cin >> string1;
cin >> string2;
//cout << string1.lengthof();

cout << string1;
cout << string2;

}

Re: overloaded operator +

Michael Martin23-Oct-01 17:49

Michael Martin

23-Oct-01 17:49

What about this.

myString operator+(myString A,myString B)
{
   int nLength = strlen(A);
   nLength += strlen(B);

   char* pStr = new char[nLength+1];

   for(int nCnt = 0; nCnt++; nCnt < (strlen(A)-1))
      pStr[nCnt] = A[nCnt];

   for(nCnt = 0; nCnt++; nCnt < (strlen(B)-1))
      pStr[strlen(A)+nCnt] = B[nCnt];

   pStr[nLength] = 0; // Null terminate

   myString str(pStr);

   return (str);
}

Think it should work.

Michael Martin
Pegasystems Pty Ltd
Australia
martm@pegasystems.com
+61 413-004-018

"Don't belong. Never join. Think for yourself. Peace"
- Victor Stone

Re: overloaded operator +

Todd Smith23-Oct-01 18:36

Todd Smith

23-Oct-01 18:36

What's wrong with std::string, std::stringstream, etc. ?

Re: overloaded operator +

Christian Graus23-Oct-01 18:57

Christian Graus

23-Oct-01 18:57

Or strcat ? I suspect he's doing a homework assignment ( which is fair enough, he's had a go and posted code to ask for help, but I can't think of any other reason to write another string class. Having said that, I did it for the sake of the exercise, although I obviously use basic_string rather than my own, that was not the point. ).

Christian

After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001

Re: overloaded operator +

#realJSOP24-Oct-01 2:44

#realJSOP

24-Oct-01 2:44

He may be doing what he's doing because...

a) the existing code that has to be amended but cannot be changed beyond the new code being added

b) an insane project lead refuses to think outside the box and insist that the guy use his (the project lead) classes

c) he's doing a homework assignment which requires him to write his own string class

d) he doesn't like the std::string class

Why can't you just answer the question posted instead of asking why he doesn't use this or that?

To hell with those thin-skinned pillow-biters. - Me, 10/03/2001

Re: overloaded operator +

Todd Smith24-Oct-01 14:08

Todd Smith

24-Oct-01 14:08

The same way you answered the question?

His code doesn't even call the function he's asking for so I was somewhat confused as to what he wanted.

CCustomDraw for Trackbar

clintsinger23-Oct-01 14:17

clintsinger

23-Oct-01 14:17

Hi, I need to make my own owner drawn/custom drawn trackbar control but all the examples that I have found are geared for the listview control. I was wondering if anyone has a tutorial or an example of what to do.

Thanks,
Clint

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