C / C++ / MFC

Shog⁹22-Nov-02 13:05

Shog⁹

22-Nov-02 13:05

This may be overkill for your needs, but check out:
http://sourceforge.net/projects/xdelta/[^]

Shog⁹
~~------~~

That why you have a dual processor system. One for system, one for the screen saver - Mark Nischalke on Win2k server administration

moliate22-Nov-02 15:29

moliate

22-Nov-02 15:29

Looks very interesting. I've printed the article and will read it tonight.

Thanks a lot!

/moliate

Scott H. Settlemier23-Nov-02 6:32

Scott H. Settlemier

23-Nov-02 6:32

nice discussion here[^]

The problem with a big chunk of memory is the pure size of the string.
Most diff-like programs use something other than a byte or character
as the basic string element. (e.g. a line of text is probably the most
common string element for the diff algorithm. hence the 'string' is
really only as long as the number of lines in the file.)

If you can give up the minimum # of byte changes in the two
memory blocks, you can get better performance by using some suitable
'chunk' definition to break up memory into the elements of the strings
to be passed for diff analysis.

I'm no expert on this but was implementing something similar just
recently where the diff was first calculated on our chunks, and only
if the changed regions were small, would a finer intra-chunk diff be
performed.

Be careful though, your chunk definition should have the property
that changes naturally fall within chunks, not across chunk boundaries.

extracting dialog box to use in other program

moliate25-Nov-02 8:58

moliate

25-Nov-02 8:58

Thanks.

My problem is mostly that the string cannot be divided into natural chunks, meaning that the insertion of a single byte could impose a lot of extra processing.

I'll look more closely at the PERL code for the LCS. It seems to have some memory improvements over full table LCS, which is very nice when working with strings of 100kb each.

Cheers
/moliate

The corners of my eyes catch hasty, bloodless motion -
a mouse?
Well, certainly a peripheral of some kind.

Neil Gaiman - Cold Colours

IrishSonic22-Nov-02 13:36

IrishSonic

22-Nov-02 13:36

hiya i want to extract a dialog box i have made with Insert->Resource and use it in a completely different program or programs.

is there a way of doing this??

thanks
grahamoj.

Christian Graus22-Nov-02 14:01

Christian Graus

22-Nov-02 14:01

You need to manually copy it's template from the .rc file and copy into the new ones. All items in it will have a name, they will have to be manually added with new values into the list of resource ID's, and the value at the bottom of the file for next available ID will also need to be incremented.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

IrishSonic22-Nov-02 14:12

IrishSonic

22-Nov-02 14:12

thanks for that, but thats what i actually thought of already, but my problem is that the .rc file is completely empty.

i created the dialog from Insert->Resource ( and added what i wanted in it from the floating menu - e.g edit boxes etc.) but it didn't add any code to the .rc file. which as i say is completely blank. Cry | :((

any ideas??
thanks grahamoj.

Christian Graus22-Nov-02 14:14

Christian Graus

22-Nov-02 14:14

It's a mystery to me how this is possible, sorry. I dunno where else VC would store the dialog box.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

IrishSonic23-Nov-02 5:37

IrishSonic

23-Nov-02 5:37

i thought i could extract like a icon or something..

does anyone else know how to extract the actual dialog form??

thanks
grahamoj.

Folder Selection Dialog

Dov Sherman22-Nov-02 11:06

Dov Sherman

22-Nov-02 11:06

I'm working on an application in which I need the user to be able to select a folder path on their computer without selecting a file. This path could then be used for outputting multiple files to the same user-specified location.

Does MSVC++ include a dialog class appropriate for selecting a folder?

Alvaro Mendez22-Nov-02 11:25

Alvaro Mendez

22-Nov-02 11:25

Look up SHBrowseForFolder[^] on MSDN but I'm sure you'll find nicer implementations here on CP.

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

Dov Sherman22-Nov-02 12:50

Dov Sherman

22-Nov-02 12:50

I see! Hmm... that should work.

Okay, so if I do it like this...

BROWSEINFO info;<br />
LPITEMIDLIST pList;<br />
char buffer[MAX_PATH];<br />
<br />
info.hwndOwner = GetSafeHwnd();<br />
info.pidlRoot = NULL;<br />
info.pszDisplayName = buffer;<br />
info.lpszTitle = "Select Output Folder";<br />
info.ulFlags = BIF_EDITBOX | BIF_VALIDATE | BIF_STATUSTEXT;<br />
info.lpfn = NULL;<br />
<br />
pList = SHBrowseForFolder(&info);<br />
if(pList == NULL) return;

How do I get the selected path out of the ITEMIDLIST and into a char * or CString?

Alvaro Mendez22-Nov-02 14:30

Alvaro Mendez

22-Nov-02 14:30

char szPath[MAX_PATH];<br />
SHGetPathFromIDList(pList, szPath);

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

I need a "theme-able" C++ GUI

Dov Sherman22-Nov-02 15:50

Dov Sherman

22-Nov-02 15:50

I think that might be the last piece of the puzzle I needed to complete my application. Thank you, Alvaro. I appreciate your help very much!

Jim Howard22-Nov-02 10:44

Jim Howard

22-Nov-02 10:44

Howdy,

I'm working on a project that includes a windows client program. I did a prototype that was basically an MFC SDI application that hosted IE with CHtmlview. I displayed HTML pages with controls, and processed the POST results. I also had some functionality in the toolbar and menus.

It really worked well and I was happy with it. I demoed it to the PHB's and they liked it, but thought the "square" MFC window was "dull and boring".

They now want me to keep the same web browser based GUI, but instead of hosting IE in a "boring" MFC window, they want it inside of a sexy bitmap of arbitary shape.

They want something"theme-able" like Winamp, so that an artist can draw the GUI and I can add the fuctionality. One of them really likes the Roxio CD burner GUI as an example. They need this client to be fairly small, they don't want to do it in Macromedia Flash if we can do it C++.

I'm sure there is a C++ application framework out there that supports themes. Can any of ya'll post a pointer or a suggestion?

thanks

Jim

Re: I need a "theme-able" C++ GUI

Christian Graus22-Nov-02 13:35

Christian Graus

22-Nov-02 13:35

If you search for 'skinnable' on CP, there is an example, although not with windows of arbitrary shape. I've not used it so I dunno how good it is.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Memory leak... UI Thread

RobJones22-Nov-02 9:53

22-Nov-02 9:53

Hello,
This maybe a vague question but I figure I'll ask it anyway.. I have a UI thread that gets spawned from my app.. when I close the app I see a memory leak and it points to this...

IMPLEMENT_DYNCREATE(CConnectThread, CWinThread) <--------

Why is that? I close the UI thread from with in it's self by issuing a AfxEndThread(0,TRUE);

Weird.. any ideas?

Rob

Neville Franks22-Nov-02 10:36

Neville Franks

22-Nov-02 10:36

According to the docs for "Normal Thread Termination"

"For a user-interface thread, the process is just as simple: from within the user-interface thread, call PostQuitMessage in the Platform SDK. The only parameter that PostQuitMessage takes is the exit code of the thread. As for worker threads, 0 typically signifies successful completion."

Hope that helps.

Neville Franks, Author of ED for Windows. www.getsoft.com

RobJones22-Nov-02 10:40

22-Nov-02 10:40

Thanks for the reply.. I have tried to use PostQuitMessage.. But I am unsure how to obtain the exit code.. Can you give me a hint Smile | :)

Thanks,
Rob

Neville Franks22-Nov-02 10:48

Neville Franks

22-Nov-02 10:48

RobJones wrote:
Thanks for the reply.. I have tried to use PostQuitMessage.. But I am unsure how to obtain the exit code.. Can you give me a hint

I'm afraid I don't know the answer to this. I would have thought MS would have examples on their site. Do a search there for UI Threads and alike.

Neville Franks, Author of ED for Windows. www.getsoft.com

RobJones22-Nov-02 11:12

22-Nov-02 11:12

Did some research and the exit code would be the same code you would use in WM_CLOSE (wParam) which is usually 0... I went ahead and replaced my AfxEndThread with PostQuitMessage(0) and everything seems to be working fine.. (I'm not seeing any memory leaks..)

Thanks again!
Rob

Alvaro Mendez22-Nov-02 11:20

Alvaro Mendez

22-Nov-02 11:20

One hint coming up:

GetExitCodeThread[^]

Smile | :)

Regards,
Alvaro

Well done is better than well said. -- Benjamin Franklin
(I actually prefer medium-well.)

RobJones22-Nov-02 12:07