CListCtrl::SortItems problem - C / C++ / MFC Discussion Boards

What is a class?

Anonymous1-Mar-03 5:18

Anonymous

1-Mar-03 5:18

I wondering what a class is and how you use it and what it does. Thanks

Re: What is a class?

pnpfriend1-Mar-03 6:26

pnpfriend

1-Mar-03 6:26

do you know how to declare the variables types?
for example.. int a; int is a class object or name ( in simple way to say it). You can create your own variable types like int . Your own types could be anything, blablabla, hehehe, employee, newYork, etc

<br />
class newYork<br />
{<br />
};<br />
<br />

Is that what you want to know??

Re: What is a class?

Renjith Ramachandran1-Mar-03 6:53

Renjith Ramachandran

1-Mar-03 6:53

hi please read one c++ book atleast and then ask the questions..

CodeTheDreams();

Re: What is a class?

Chris Richardson1-Mar-03 20:21

Chris Richardson

1-Mar-03 20:21

"CodeTheDreams();" as your sig is really cool too, by the way.

Chris Richardson

C/C++ Include Finder[^]

Re: What is a class?

Trollslayer1-Mar-03 9:23

Trollslayer

1-Mar-03 9:23

Think of it as a struct with functions as well as data Smile | :)

Elaine

The tigress is here Big Grin | :-D

Re: What is a class?

Alexo@home1-Mar-03 11:38

Alexo@home

1-Mar-03 11:38

It is a custom datataype in C++.

Re: What is a class?

Joan M2-Mar-03 21:08

Joan M

2-Mar-03 21:08

A class is the declaration of an object.

Let's imagine a button; a button have a color, a text, sometimes an image, and a function that gets signaled when the user clicks it...

A button is an object.

The declaration of a button would be (in easy terms) :

class CButton
{
  COLORREF color;
  CString csText;
  CBtimap bmpImage;

  void Onclick();
}

OK, now you have that class declarated, and now it's the time to use it in your code.

In your code you can instantiate (once you have your class declared you can define it everywhere where it is known).

Each time you need to use the class (the button in this case) you'll be declaring objects of that class (instantiating them) in this way:

in the Header file of your XXX dialog you could write:

...
private:
  CButton m_mybutton;
...

and in your dialog initdialog function:

...
  m_mybutton.color = 12344;
  m_mybutton.text = "hello"
  ...
...

ow it's time to read a book of cpp and to learn how it really works, but this should be a good starting point...

Hope this helps.

CListCtrl::SortItems problem

Wim Jans1-Mar-03 5:14

Wim Jans

1-Mar-03 5:14

I'm trying to mimick the 'arrange icons by...' as seen in explorer in my CListView based app.
I've looked up the method to implement this on msdn and have implemented my sort routine. So far so good...

The problem I have is that in mY sort function (compare function) I always receive the first record (0) of my listview to compare.

Some code snippits to explain:

void CMylistView::OnViewBydescr() <br />
{<br />
<br />
	CListCtrl* m_cListCtrl;<br />
	m_cListCtrl=&GetListCtrl();<br />
	m_cListCtrl->SortItems(SortFunction, (LPARAM)(m_cListCtrl));<br />
}

int CALLBACK CMylistView::SortFunction(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)<br />
{<br />
  CListCtrl* pListCtrl = (CListCtrl*) lParamSort;<br />
  CString    strItem1 = pListCtrl->GetItemText(lParam1, 0);<br />
  CString    strItem2 = pListCtrl->GetItemText(lParam2, 0);<br />
  return strcmp(strItem1, strItem2);<br />
}

Re: CListCtrl::SortItems problem

Wim Jans1-Mar-03 5:28

Wim Jans

1-Mar-03 5:28

Solved it!

I changed

m_cListCtrl->SortItems(SortFunction, (LPARAM)(m_cListCtrl));

into

ListView_SortItemsEx(GetSafeHwnd(), SortFunction, (LPARAM) this);

But why doesn't the m_cListCtrl->SortItems doesn't work Confused | :confused:

Wim

Re: CListCtrl::SortItems problem

Michael Dunn1-Mar-03 6:17

Michael Dunn

1-Mar-03 6:17

Two problems. First, change

SortItems ( SortFunction, (LPARAM) m_cListCtrl )

SortItems ( SortFunction, (LPARAM) &m_cListCtrl ) // add ampersand

Second, you are thinking lParam1 and lParam2 are the item indexes, but they are not, they are the lParam data associated with the two items being compared. They are always 0 because you probably don't use those data members.

--Mike--
PROCRASTINATION: Hard work often pays off after time, but laziness always pays off now.

BUY MY SOFTWARE!! (please?) RightClick-Encrypt - file encryption w/Explorer plugins | 1ClickPicGrabber - web page picture grabber for IE
My IntarWeb Homepgae!!!11

C# Control in MFC

Anonymous1-Mar-03 5:00

Anonymous

1-Mar-03 5:00

hi!
how can i use a c# (.net) control in mfc? is this possible?

Strange Compiling error (not MFC)

orcblood1-Mar-03 4:44

orcblood

1-Mar-03 4:44

Okay, I also made another version of my program... Unfortunatly it won't compile and it gives me this wierd error:

LINK : fatal error LNK1104: cannot open file "nafxcwd.lib"

I don't know why... Anyways, Im betting its because the lib file isn't linked again btu hey Ive nver seen it before...

Any help would be appreciated.
orcblood

Re: Strange Compiling error (not MFC)

orcblood1-Mar-03 4:49

orcblood

1-Mar-03 4:49

Oh I should say that I made it with C++ and not MFC!

orcblood

Re: Strange Compiling error (not MFC)

Navin1-Mar-03 10:27

Navin

1-Mar-03 10:27

I have seen those types of errors before - you need to check out your project settings.

Make sure all projects and .libs you include in your project have the same setting in the C++ tab under "Code Generation" - they should all be "Multithreaded Debug" for debug mode, or "Multithreaded Release" for release mode. You could ahve them all "Single threaded" too. You can't mix debug and release, nor should you mix single and mulitithreaded.

Give that a go and see what happens. Also, try the obvious, do a "Clean" and then rebuild it. Wink | ;)

You can pick your friends, and you can pick your nose, but you can't pick your friend's nose.

Strange MFC Error on Comps

orcblood1-Mar-03 2:39

orcblood

1-Mar-03 2:39

Okay, I made a simple MFC app that just opens and closes dialogs and all that Smile | :)

. However I have one small problem. I send it to someone else's comp and it gives them an error:

A required .DLL file, MFC42D.DLL, was not found

Anyone know why this is? Do I have to dig up this dll out of the MSVC++ folder and send it along with the program? Ive tried it on 3 different comps and eachone gives me the same error... Does anyone know how to fix this?

Thanks, Ive never made a program with MFC before so maybe this is why its not working.

orcblood

Re: Strange MFC Error on Comps

Frank Deo1-Mar-03 2:43

Frank Deo

1-Mar-03 2:43

You are distributing the debug version of your app. Rebuild it as "MFC Release" and re-distribute it.

Frank

Re: Strange MFC Error on Comps

orcblood1-Mar-03 2:45

orcblood

1-Mar-03 2:45

How do I do that? Lol Im a newbie at it Smile | :)

.

orcblood

Re: Strange MFC Error on Comps

Frank Deo1-Mar-03 2:48

Frank Deo

1-Mar-03 2:48

Build Menu -> Set Active Configuration -> Click Win32 Release -> ok -> rebuild All.

Frank Big Grin | :-D

Re: Strange MFC Error on Comps

Gary Kirkham1-Mar-03 2:47

Gary Kirkham

1-Mar-03 2:47

The easiest thing to do is to go to the Project menu and select Settings.... Then go to the General tab and select the Use MFC in a Static Library option.

Gary Kirkham

A working Program is one that has only unobserved bugs

I thought I wanted a career, turns out I just wanted paychecks

Re: Strange MFC Error on Comps

orcblood1-Mar-03 2:49

orcblood

1-Mar-03 2:49

It only has Use MFC in a Shared DLL option...

orcblood

Re: Strange MFC Error on Comps

orcblood1-Mar-03 2:51

orcblood

1-Mar-03 2:51

Okay, now it gives me two compiling errors:

AVI PlayerDlg.obj : error LNK2001: unresolved external symbol _MCIWndCreateA
Release/AVI Player.exe : fatal error LNK1120: 1 unresolved externals

Thanks, I know mroe now lol.
orcblood

Re: Strange MFC Error on Comps

Frank Deo1-Mar-03 3:00

Frank Deo

1-Mar-03 3:00

You are getting this error because the linker doesnt know where to find the symbol _MCIWndCreateA.

MSDN documentation says that MCIWndCreate function links to vfw32.lib. Try putting that in your linker options as a required library.

Project -> Settings -> Select "Settings for: All Configurations" -> Link Tab

Put "vfw32.lib" in the box for "object library modules". Then rebuild.

Frank

Re: Strange MFC Error on Comps

orcblood1-Mar-03 3:09

orcblood

1-Mar-03 3:09

Oh thank you soo much guys! It works now woohoo! It also works on other people's comps Smile | :)

.

orcblood

Re: Strange MFC Error on Comps

Michael Dunn1-Mar-03 6:23

Michael Dunn

1-Mar-03 6:23

orcblood wrote:
It only has Use MFC in a Shared DLL option...

You have the learning edition of VC (or whatever it's called, I forget the exact name) which doesn't let you link statically with MFC. But as you've found out, most folks have mfc42.dll already, so your release version works.

--Mike--
PROCRASTINATION: Hard work often pays off after time, but laziness always pays off now.

BUY MY SOFTWARE!! (please?) RightClick-Encrypt - file encryption w/Explorer plugins | 1ClickPicGrabber - web page picture grabber for IE
My IntarWeb Homepgae!!!11

adding my program as a service in win2K?

IGeorgeI1-Mar-03 2:26

IGeorgeI

1-Mar-03 2:26

I want to add my program.exe as a service in windows 2000. Are there any tutorials for doing this either manually or progrmatically.

any help appreciated

George W

Software Developer
www.zsystems.ca

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