C / C++ / MFC

how to get file attributes from a cluster in volume bitmap

4-Jul-09 8:32

srand[^]

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: HELP!

Joe Woodbury4-Jul-09 15:04

Joe Woodbury

4-Jul-09 15:04

Learn how to read:

http://msdn.microsoft.com/en-us/library/398ax69y(VS.71).aspx[^]

Seriously, dude. You could have gotten an answer to your question in less than a minute by using Google.

guys help me out

Sheela Gusain4-Jul-09 7:52

Sheela Gusain

4-Jul-09 7:52

hiiiii guys...
I'm a beginner MFC programmer and currently I'm working in a dialog based application working of my application is like this... user selects a directory then in a list box I'm displaying all the subfolders
present in that directory, on selecting any subfolder there is a list control which displays thumbnails of all the images present in that subfolder and then on mouse hover on any of the thumbnail , preview of that image is generated. My problem is that when there are large number of images present in a folder list contol is taking time to display thumbnails and during that processing list control just disappears I mean list control flickering is there, I don't know what is the cause and how can I fix this problem. One more thing how can display preview of image on mouse hover event
preview should be like, it should emerge out from the center of the thumbnail and zoom in and as the mouse is moved this preview should disappear. please help me in this as it is very urgent and important for me.. I shall be very greatful to you all
Thanks alot in advance...

Re: guys help me out

Hamid_RT4-Jul-09 9:05

Hamid_RT

4-Jul-09 9:05

You can use of WM_TIMER or a thread for read and load images of subfolders to listcontrol for preview you can use of WM_MOUSEMOVE and then you can use of a (its my suggestion) static control for show your images.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

ssundar19744-Jul-09 4:44

ssundar1974

4-Jul-09 4:44

Hello,
is there a way to get file attributes(filename,size and #clusters) from volume bitmap? right now i'm using ZwQueryDirectoryFile() to iterate through the entire files which is taking lot of time. any suggestions.

Thanks
Sundar

Re: how to get file attributes from a cluster in volume bitmap

Rozis4-Jul-09 10:30

Rozis

4-Jul-09 10:30

Is the good old WinAPI trio FindFirstFile()/FindNextFile()/FindClose() something for you?

Rozis

Re: how to get file attributes from a cluster in volume bitmap

Luc Pattyn4-Jul-09 11:42

Luc Pattyn

4-Jul-09 11:42

No. On almost all file systems, the sectors, clusters and allocation tables don't know what sectors belong to what files.

Long ago, Apple's MacOS had a file system where each 512B sector actually was 528B in size, and the extra 16B helped in repairing damaged file systems, by keeping redundant back-linking information, but they abandoned that (not too many vendors wanted to support the odd sector size), and I haven't seen anything similar since.

So, yes you have to iterate your files in order to figure out which sectors/clusters belong to them.

Smile | :)

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Re: how to get file attributes from a cluster in volume bitmap

Member 41945934-Jul-09 13:27

Member 4194593

4-Jul-09 13:27

Check out JkDefrag version 3.36 (4.0 is proprietary, but 3.36 is open source). Try it, you'll like it.

Dave.

What am I doing wrong?

FISH7864-Jul-09 4:15

4-Jul-09 4:15

I am evoking a dialog using

CDemoKeyDlg dlg();
m_pMainWnd = &dlg;
INT_PTR  nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
 InitDemoInstance();
}
else if (nResponse == IDCANCEL)
{
}

In the CDemoKeyDlg I have

void CDemoKeyDlg::Register()
{
if (Id == Key) 
{
MessageBox("Enjoy","It works",MB_OK);
OnOK();
}
}

What am I doing wrong the InitDemoInstance does not get evoked, I do get the message to enjoy?

Stuart Dootson4-Jul-09 4:25

4-Jul-09 4:25

What happens if you call EndDialog(IDOK); instead of OnOK?

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

FISH7864-Jul-09 4:35

4-Jul-09 4:35

I tried both...The dialog box closes.

Stuart Dootson4-Jul-09 4:48

4-Jul-09 4:48

OK - what value is DoModal actually returning then?

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

FISH7864-Jul-09 4:57

4-Jul-09 4:57

The control is just not returning back ?

Stuart Dootson4-Jul-09 5:05

4-Jul-09 5:05

Run it under the debugger. That should indicate when the application exits, if (as appears likely) there's an exception of some sort occurring.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

molesworth4-Jul-09 4:49

molesworth

4-Jul-09 4:49

What value does nResponse have? That would seem to be the simplest and most basic thing to check...

edit : a fraction too slow Smile | :)

There are three kinds of people in the world - those who can count and those who can't...

FISH7864-Jul-09 4:58

4-Jul-09 4:58

It's just not returing anything..the app just dies...

molesworth4-Jul-09 5:05

molesworth

4-Jul-09 5:05

FISH786 wrote:
It's just not returing anything..the app just dies...

In which case, you must be doing something very naughty in the dialog...

You need to step through the code in there, and see where it's going wrong. Put breakpoints in all the event handlers, and track through until you find the place it crashes.

There are three kinds of people in the world - those who can count and those who can't...

FISH7864-Jul-09 5:06

4-Jul-09 5:06

I just created a new project and using the default setting...

I still don't get the nresponse..

BOOL CToolApp::InitInstance()
CToolDlg dlg;
m_pMainWnd = &dlg;
INT_PTR nResponse = dlg.DoModal();
if (nResponse == IDOK)
{
// TODO: Place code here to handle when the dialog is
//  dismissed with OK
MessageBox(NULL,"It Works Now","Information",MB_OK);
}
else if (nResponse == IDCANCEL)
{
	// TODO: Place code here to handle when the dialog is
	//  dismissed with Cancel
}
{

I left the CToolDlg as default..I din't put any code and just clicked the ok button.
I don't get a response back.

Stuart Dootson4-Jul-09 5:15

4-Jul-09 5:15

Sounds like there's something wrong with your system, then - I just tried the very same thing and it returned 1 (IDOK) as expected when I pressed the OK button.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

FISH7864-Jul-09 5:16

4-Jul-09 5:16

Wow, Do I re-install to fix it? Or is there something I should try before re-installing?

Stuart Dootson4-Jul-09 5:21

4-Jul-09 5:21

Single-step through the MFC source code of the CDialog::DoModal call. That should let you see what happens in and after the modal message loop.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

FISH7864-Jul-09 12:33

4-Jul-09 12:33

I did single step...I do see nResponse comming back as 1. However it's just jumping the whole if block and going straight to return FALSE.

This is with just plain project no code anywhere except a message box inside the

if (nResponse == IDOK)
{
MessageBox();
}
else if (nResponse == IDCANCEL)
{
}
It's jumping this whole block.

it going to return FALSE;

the follwing is what I get at the end of the steping through.

'Tool.exe': Loaded 'C:\WINDOWS\system32\imm32.dll'
'Tool.exe': Loaded 'C:\WINDOWS\system32\uxtheme.dll'
'Tool.exe': Loaded 'C:\WINDOWS\system32\shell32.dll'
'Tool.exe': Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83\comctl32.dll'
'Tool.exe': Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.VC90.MFCLOC_1fc8b3b9a1e18e3b_9.0.30729.1_x-ww_b0db7d03\mfc90enu.dll', Binary was not built with debug information.
'Tool.exe': Loaded 'C:\WINDOWS\system32\msctf.dll'
'Tool.exe': Loaded 'C:\WINDOWS\system32\version.dll'
'Tool.exe': Unloaded 'C:\WINDOWS\system32\version.dll'
'Tool.exe': Loaded 'C:\WINDOWS\system32\msctfime.ime'
The program '[976] Tool.exe: Native' has exited with code 0 (0x0).

However I did an uninstall of the update of Internet Explorer that was done on this machine a week ago.

I am Running Visual Studio 2008
Version 9.0.30729.1 SP

Not sure if the above info makes any difference?

Stuart Dootson4-Jul-09 12:36