C / C++ / MFC Discussion Boards

ashishbhatt15-Oct-07 19:04

15-Oct-07 19:04

Hi All,

I am using list class in my project(MFC Application). I have made list like .....

typedef std::list<rect> rectlist; // Here list is of type RECT

in one header file. And during my project execution I am storing rectangles in the list.

And now,When I use list iterator in another class like below....( I have already included its header file in using class)

rectlist::iterator i;

And i use this iterator like below in any other function......

for (i = rects.begin(); i != rects.end(); i++)
{
CaptureScreen(*i, m_mainbuff); // Error is here
}

I got error msg like ...

list iterator not dereferencable

at runtime in debug assertion Failed Box.

Thanks in Advance...

Ashish

-- modified at 1:10 Tuesday 16th October, 2007

Re: List iteration Problem

zakkas248315-Oct-07 20:11

zakkas2483

15-Oct-07 20:11

it may because of using *i in argument.

solution is try to give appropriate argument in function calling then copy it in to original list.

or it may required type casting..

give me the prototype of CartureScreen( ) function.

Re: List iteration Problem

ashishbhatt15-Oct-07 20:29

ashishbhatt

15-Oct-07 20:29

Prototype of CaptureScreen()...

void CaptureScreen(RECT &UpdateArea, BYTE *scrBuff);

i have just used this ....

<br />
rectlist::iterator i;<br />
<br />
for (i = rects.begin(); i != rects.end(); i++)<br />
{<br />
      CaptureScreen(*i, m_mainbuff);<br />
}<br />
<br />

But in my case it does not go into loop even if condition is true. And if I make..

i == rects.end()

then it goes into the loop but their values are different.And if it goes into loop then it gives error as I explained above.And if I make it like....

<br />
      CaptureScreen((RECT &)i, m_mainbuff);<br />
<br />

then it does not give error.But when for is incremented then again it gives error like....

list iterator is not incremental

That's all the case....

Thanks Hiru.

Re: List iteration Problem

Nelek15-Oct-07 21:05

Nelek

15-Oct-07 21:05

what about with...

rectlist::iterator i;

for (i = rects.begin(); i != rects.end(); i++)
{
CaptureScreen(&i, m_mainbuff);
}

Greetings.

--------
M.D.V.

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Help me to understand what I'm saying, and I'll explain it better to you

Wink | ;)

Re: List iteration Problem

zakkas248315-Oct-07 21:38

zakkas2483

15-Oct-07 21:38

Yes, i also think this is true ans..

hiru

Re: List iteration Problem

ashishbhatt15-Oct-07 22:06

ashishbhatt

15-Oct-07 22:06

I have little much found that I am not getting perfect list which I have stored.

here I am fetch the rectangles list from below....

<br />
// Get list of rectangles for checking<br />
	rectlist rectsToScan;<br />
	m_region.Rectangles(rectsToScan);<br />
<br />

m_region is the object of the RTMPRegion class in which i storing rectangles in to the list.

But when I fetch by above then I Test like below.....

<br />
<br />
        rectlist ::iterator i;<br />
	for(i = rectsToScan.begin();i==rectsToScan.end();i++)<br />
		CaptureScreen(*i, m_mainbuff);<br />

Then in the value of i any junk value comes.Here i is RECT ,so in left,right,top,bottom values are junk values.

Re: List iteration Problem

ashishbhatt15-Oct-07 22:17

ashishbhatt

15-Oct-07 22:17

It gives me the error using ....

CaptureScreen(&i, m_mainbuff);

Error like...

error C2664: 'RTMPDesk::CaptureScreen' : cannot convert parameter 1 from 'std::list<_Ty>::_Iterator<_Secure_validation> *__w64 ' to 'RECT &'

My Function deff...

void CaptureScreen(RECT &UpdateArea, BYTE *scrBuff);

thanks.

Re: List iteration Problem

zakkas248315-Oct-07 22:59

zakkas2483

15-Oct-07 22:59

Try this
CaptureScreen( i ,m_mainbuff );

Re: List iteration Problem

ashishbhatt15-Oct-07 23:16

ashishbhatt

15-Oct-07 23:16

Thanks Hiru,,

Just before your message comes I found little solution and that is like that I did not get exect values from the list thats why it gave me error.At right now I am not getting error.

I am using same as

CaptureScreen(*i,m_Mainbuff);

If there will be some problem then i will contact U.

Thanks for your valuable time.Thank u v much.

Ashu

Re: List iteration Problem

David Crow16-Oct-07 2:29

David Crow

16-Oct-07 2:29

Since i is an iterator, you must use the dereference operator.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: List iteration Problem

David Crow16-Oct-07 2:30

David Crow

16-Oct-07 2:30

Nelek wrote:
CaptureScreen(&i, m_mainbuff);

Since i is an iterator, you must use the dereference operator.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Build error in calling static library function

MKUser15-Oct-07 16:59

MKUser

15-Oct-07 16:59

Hi,

I attach one static library project(project2) to my main project. My main exe is console application which i'm buiding in .net 2003.
When i call a function of sttic library project(project2) i got following error

error C3861: 'FunctionName': identifier not found, even with argument-dependent lookup

To solve this i have tried to include stdio.h in static library project(project2).
My main project is using one more function of another static library project (project1)and there is no error in calling that function.

If i dont call the function of sttic library project(project2) then there is no error.

please suggest how to solve it

Manoj Kumar Chauhan

Monitoring files

dArK cHAriSmA15-Oct-07 16:06

dArK cHAriSmA

15-Oct-07 16:06

Hi all!

With your help, I would like to write a program that monitors which ever files system opens, creates, writes to, reads from .... and finaly updates those neatly in it's log - same as any antivirus monitor but without virus-checking. I've written a code that uses ReadDirectoryChangesW, but it only triggers when file is launched or date/time modified. Which function should I use? It's important that my program should 'be aware' when any other program reads from certain file (ie. catch the name of INI file being read from). I hope that I was clear. I've downloaded some projects, but they didn't do. I'm using Borland C++ 5.0.

Thanx

dArK cHAriSmA

Re: Monitoring files [modified]

azonenberg15-Oct-07 17:52

azonenberg

15-Oct-07 17:52

There are two options I can think of:

* Write a file system driver
* Poll the file system at regular intervals (probably about 100 ms) - attempt to open the file
with exclusive access. If it fails, then someone else is using it. If it succeeds, close it
because it's not in use. This option is a lot easier to code, but uses more CPU.

-- modified at 0:06 Tuesday 16th October, 2007

Re: Monitoring files

Hamid_RT15-Oct-07 19:32

Hamid_RT

15-Oct-07 19:32

See FindFirstChangeNotification and How to get a notification if change occurs in a specified directory [^].

VS6.0 Modeless Dialog as a static library or DLL

Ralph_L15-Oct-07 9:48

Ralph_L

15-Oct-07 9:48

I have a Dialog box (and associated .cpp and .h files) developed in VS6.0 MFC that is called as a modeless dialog from its parent dialog based application. I wish to reuse this in other projects and share with coworkers.
Is there a way to do so, say as a Static Library or DLL perhaps?
I can create the static library using the code, but do not know how to add in the dialog that is related to it.
Are there any examples available I could learn from?
Any help would be greatly appreciated. Thanks.

Ralph_L

Re: VS6.0 Modeless Dialog as a static library or DLL

Mark Salsbery15-Oct-07 10:26

Mark Salsbery

15-Oct-07 10:26

You can use either a static library or a dll, whatever is more appropriate.

If you use a DLL, the DLL needs to be an MFC extension DLL.

Create the appropriate project type and add the cpp and h files, and copy the dialog
resource into the project.

For the DLL, you'll need to change the class declaration:

class AFX_EXT_CLASS CMyDialog : public CDialog
...

For a static library you need to make sure you have a scheme in place so resource IDs
won't clash with the module it's linked with.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: VS6.0 Modeless Dialog as a static library or DLL

#realJSOP15-Oct-07 11:00

#realJSOP

15-Oct-07 11:00

Of course, that means that any program that uses the DLL must itself be an MFC app.

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

Re: VS6.0 Modeless Dialog as a static library or DLL

Mark Salsbery15-Oct-07 11:04

Mark Salsbery

15-Oct-07 11:04

I guess I just assumed it was MFC code since the op stated
"developed in VS6.0 MFC".

Stupid me.

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: VS6.0 Modeless Dialog as a static library or DLL

#realJSOP15-Oct-07 11:54

#realJSOP

15-Oct-07 11:54

I was merely posting a gentle reminder because the OP didn't say that the "other programmers" were writing in C++/MFC.

Smile | :)

Re: VS6.0 Modeless Dialog as a static library or DLL

Mark Salsbery15-Oct-07 12:00

Mark Salsbery

15-Oct-07 12:00

Thanks. I was merely making sure the other programmers had no choice Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Re: VS6.0 Modeless Dialog as a static library or DLL

Rajesh R Subramanian15-Oct-07 22:38

Rajesh R Subramanian

15-Oct-07 22:38

Mark Salsbery wrote:
I was merely making sure the other programmers had no choice

Real men drive manual transmission.

How to wait for folder to finish copy

icsr15-Oct-07 7:19

icsr

15-Oct-07 7:19

Hi everybody,

What is the best way in Visual C++(6.0) to make a program wait till a folder is completely copied. I have a program that would constantly watch an Input folder, Job folders are being copied to the Input folder, which I want to move to the InProgress folder for processing, once they are fully copied.

Thank you in advance,
Indu

Re: How to wait for folder to finish copy

David Crow15-Oct-07 8:01

David Crow

15-Oct-07 8:01

icsr wrote:
What is the best way in Visual C++(6.0) to make a program wait till a folder is completely copied.

Are you doing this copying via code?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: How to wait for folder to finish copy

icsr15-Oct-07 12:59

icsr

15-Oct-07 12:59

No, the folders are copied out side of the program. The program should be able to identify the folders that are complete, as opposed to the ones that are still in progress. I tried traversing the directory with FindFirstFile and FindNextFile and tried opening the files inside, hoping that if it returns an invalid handle then the directory is still in progress. But this did not work.

Any helpful hints?

Thank you,
Indu

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