C / C++ / MFC Discussion Boards

David Crow13-Feb-04 5:39

13-Feb-04 5:39

Steve S wrote:
If you adopt David's approach (which works perfectly well), you can improve performance by suppressing the individual delete notifications, as you no longer need them.

But if the LVN_DELETEITEM notification is suppressed, won't that still result in a memory leak?

A rich person is not the one who has the most, but the one that needs the least.

Re: List View Question

Steve S13-Feb-04 6:35

Steve S

13-Feb-04 6:35

Perhaps you need to read your own post Wink | ;)

(but then, it is Friday)

If you've already iterated over and deleted, then the additional notifications are a waste of time, so you should suppress them, but you don't have to.

However, if you don't iterate, then catching the individual notifications is the best way to do it, and delete a bit at a time.

Alternatively, you could have all the items (and only the items!) in a private heap, catch the message for delete all, and just destroy the heap Cool | :cool:

for the ultimate performance improvement Smile | :)

Steve S

ClistCtrl checkboxes

alex.barylski13-Feb-04 4:33

alex.barylski

13-Feb-04 4:33

Is there an event which fires when a checkbox (CListCtrl) has been clicked? I don't want to check each item iteratively and check for it's checkbox being checked...but it looks like I am oging to have to Frown | :(

Also is there a way I can replace the checkbox with a custom icon checkbox?

Thanks again Smile | :)

Cheers

The word of the day is legs, let's go back to my house and spread the word Poke tongue | ;-P

Re: ClistCtrl checkboxes

valikac13-Feb-04 4:42

valikac

13-Feb-04 4:42

One solution is to handle the LVN_ITEMCHANGED message.

NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;

// No change
if (pNMListView->uOldState == 0 && pNMListView->uNewState == 0)
...

BOOL bOldState = (((pNMListView->uOldState &
LVIS_STATEIMAGEMASK) >> 12) - 1);

// Initial startup - dialog window initialization
if (bOldState < 0)
...

// New checkbox state
BOOL bStatus = (((pNMListView->uNewState & LVIS_STATEIMAGEMASK) >> 12) - 1);
// Unchecked
if (bStatus < 0)
...

// No change
if (bOldState == bStatus)
...

You got the idea?

Kuphryn

Re: ClistCtrl checkboxes

alex.barylski13-Feb-04 10:00

alex.barylski

13-Feb-04 10:00

Very clever Smile | :)

Thanks, I never would have thought of using that approach Smile | :)

Cheers

The word of the day is legs, let's go back to my house and spread the word Poke tongue | ;-P

Re: ClistCtrl checkboxes

Joe Woodbury13-Feb-04 16:51

Joe Woodbury

13-Feb-04 16:51

Handle the item changed message and call CListCtrl::GetCheck()

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

batch file

Jerome Conus13-Feb-04 4:19

Jerome Conus

13-Feb-04 4:19

Hi !

Sorry, this is not really a C++ question, but, for my application, I need to create a batch file which would perform something on all cpp files in my current directory.

I would have to do something like this :

DoSomething filename.cpp filename.usf

Where DoSomething is a command which will take the given cpp file and generate a usf file with the same name as the cpp file (only the extension will change).

How can I do a batch to automatically do this on all cpp files (*.cpp) ?

Thank you for your help !
Jerome

Re: batch file

David Crow13-Feb-04 4:28

David Crow

13-Feb-04 4:28

FILE1.BAT:
for %%x in (*.cpp) do FILE2.BAT %%x

FILE2.BAT
DoSomething %1

Or if you just want one file:

FILE1.BAT:
for %%x in (*.cpp) do call :DO_IT %%x
exit
:DO_IT
DoSomething %1

A rich person is not the one who has the most, but the one that needs the least.

Re: batch file

Michael Dunn13-Feb-04 4:29

Michael Dunn

13-Feb-04 4:29

For batch files that need to manipulate filenames like that, I use 4DOS/4NT[^] - writing batch files with it is way easier.

cdd "%1"<br />
for /a:-d %a in (*.cpp) DoSomething "%a" "%@name[%a].usf"

Run it with the directory name as the parameter

--Mike--
Personal stuff:: Ericahist Updated Feb 6! | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
"That probably would've sounded more commanding if I wasn't wearing my yummy sushi pajamas."
-- Buffy

Re: batch file

Prakash Nadar13-Feb-04 4:54

Prakash Nadar

13-Feb-04 4:54

Michael Dunn wrote:
--Mike--
Personal stuff:: Ericahist Updated Feb 6! | Homepage

who is the woman in the link ericahist????sure she is pretty
is she ur wife/gf???? Hope you dont mind asking that question.

Last time I was sober, man I felt bad
Worst hangover that I ever had
It took six hamburgers and scotch all night
Nicotine for breakfast just to put me right.... Dire Straits

Re: batch file

Michael Dunn13-Feb-04 6:12

Michael Dunn

13-Feb-04 6:12

Heh, no no, she's one of the people on The .NET Show[^]

--Mike--
Personal stuff:: Ericahist | Homepage
Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt
CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ
If my rhyme was a drug, I'd sell it by the gram.

Re: batch file

Prakash Nadar13-Feb-04 15:44

Prakash Nadar

13-Feb-04 15:44

Oh ok. I dont get .NET show here in India.

Last time I was sober, man I felt bad
Worst hangover that I ever had
It took six hamburgers and scotch all night
Nicotine for breakfast just to put me right.... Dire Straits

Small expand and collapse icons

alex.barylski13-Feb-04 4:14

alex.barylski

13-Feb-04 4:14

You know the ones used for tree controls???

Are they just 16x16 icons? Can I get those icons from the system tray or do I have to add my own icons?

thanks Smile | :)

The word of the day is legs, let's go back to my house and spread the word Poke tongue | ;-P

Re: Small expand and collapse icons

Neville Franks13-Feb-04 10:03

Neville Franks

13-Feb-04 10:03

They are 16x16 bitmaps. Windows does not provide a standard set that you can use from memory so you need to supply your own. On XP you may be able to use the Theme functions to get it to draw them for you.

Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com

Query about STL list

Nirav Doshi13-Feb-04 4:12

Nirav Doshi

13-Feb-04 4:12

Hi,

I am trying some code similar to what I have posted below, but it is not being compiled on the VC++ 7.0 Frown | :(

and on VC++ 6.0 it gives a INTERNAL_COMPILER_ERROR Dead | X|

#include <list>
...
template <class clDataType>
class CMyData
{
    clDataType    myObj;                   // Typically will be a string type only
    unsigned long myObjSize;

    public:
    ...
};

template <class clDataType>
class CMyManager
{
    unsigned int  nIndex;
    clDataType    myData;                   // This is ALSO required
    list<CMyData<clDataType>> myList;       // :sigh: This is making me :((

    public:
    ...
};

What I am trying is to have a STL list of CMyData<clDataType>! Confused | :confused:

Is it possible or am I doing some mistake?! D'Oh! | :doh:

Thanks,
Rgds,

Nirav

* Don't wish it was easier, wish you were better! *

Re: Query about STL list

Henrik Stuart13-Feb-04 4:20

Henrik Stuart

13-Feb-04 4:20

Your problem is this line:

list<CMyData<clDataType>> myList;

due to the lexical analysis of C++ it has to be written as this:

list<CMyData<clDataType> > myList;

as such the space is crucial. The >> is parsed as right-shift, even though it makes little sense in that context (also is why it causes an error).

Hope that helps.

--
Henrik Stuart (http://www.unprompted.com/hstuart/)

Re: Query about STL list

Nirav Doshi13-Feb-04 4:26

Nirav Doshi

13-Feb-04 4:26

Hello Henrik,

It worked!... Thanks a ton! Blush | :O

... Well pointed out!

So much about Micro$oft Compiler!

Thanks,
Rgds,

Nirav

* Don't wish it was easier, wish you were better! *

Re: Query about STL list

Henrik Stuart13-Feb-04 4:33

Henrik Stuart

13-Feb-04 4:33

Hey,

You're welcome. It isn't, however, limited to Microsoft's compiler, it's mandated in ISO/IEC 14882:1998 and as such part of C++ as a language. You would get the same behaviour in any other C++ compiler. Smile | :)

--
Henrik Stuart (http://www.unprompted.com/hstuart/)

Re: Query about STL list

Nirav Doshi13-Feb-04 4:37

Nirav Doshi

13-Feb-04 4:37

Oh, is it?!
My apologies to Bill Gate$ & Micro$oft!

* Don't wish it was easier, wish you were better! *

Re: Query about STL list

Robert A. T. Káldy16-Feb-04 12:52

Robert A. T. Káldy

16-Feb-04 12:52

Don't apologize. The VC should report this as a parse error, not internal compiler error! Smile | :)

Robert-Antonio

Love, truth and electric traction must gain victory over hate, lie
and diesel traction.

Creating Windows Application

engineer_ali13-Feb-04 4:08

engineer_ali

13-Feb-04 4:08

Hello everybody, well i've got a question Visual C++ concerning creating a windows application instead of console application, and sorry if it's a silly question since i'm used to work on console applications only. So please can u show me the steps and the required syntax for creating this windows application ?

Thanks for your help .

Re: Creating Windows Application

Maximilien13-Feb-04 4:16

Maximilien

13-Feb-04 4:16

with visual studio, create a new project "MFC AppWizard exe" and continue from there, you have 3 choices, SDI, MDI or dialog based; this will generate the basic skeleton for an application.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Creating Windows Application

valikac13-Feb-04 4:47

valikac

13-Feb-04 4:47

I highly recommend these books on windows programming using C++. Make sure you read them in this exact order.

MFC:

Introduction to MFC Programming with Visual C++ by Richard M. Jones
Programming Windows With MFC by Jeff Prosise

Win32 API:
Programming Windows by Charles Petzold

Kuphryn

Programming Applications for Windows (J Richter)

JGStanier13-Feb-04 3:19

JGStanier

13-Feb-04 3:19

Am trying to get Jeffrey's LastMesaageBox example hooking software working on XP using Microsoft Development Studio .NET. I keep getting an error that the stack is overflowing just when the message box is being displayed. Anyone have any ideas? Sigh | :sigh:

Re: Programming Applications for Windows (J Richter)

valikac13-Feb-04 4:48

valikac

13-Feb-04 4:48

Debug it. Where is the error linked to?

Kuphryn

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.