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Those work perfectly, but I'm not sure how that helps me to display the file properties.
Thanks
modified 12-Jul-20 21:01pm.
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Is it possible to save a dialog box like a regular document?
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Well since the CDialog is derived from the CObject then it is well posible to serialize the object.
I believe you need to follow the guidlines how to make an implement serialization.
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I need to remove the first ~1 MB or so from some files that tend to be 20 Gig or more.
Is there a way to do this without creating a complete copy of the file? My code currently seeks for the appropriate data in the front of the file, then coppies everything after that point to a new file.
If I could just "delete" the first part, I'd be set.
Any hints?
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Can't see how this is possible. I think that the fastest way to copy a large file would be to use memory mapped files.
Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com
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Neville Franks wrote:
I think that the fastest way to copy a large file would be to use memory mapped files.
Still it is going to consume 20gb of extra resource.
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Mr.Prakash wrote:
Still it is going to consume 20gb of extra resource.
Nope. You can simply move the remaining 19.9G in the orginal file. There is no need to copy the file in this particular case. A simple memmove() should do the trick.;)
Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com
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Neville Franks wrote:
Nope. You can simply move the remaining 19.9G in the orginal file. There is no need to copy the file in this particular case. A simple memmove() should do the trick.
Well in this case you need either 20gb of physical memory or 20gb of harddiskspace for the swapfile.
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not true... there is an option to force the kernel(nt or later) to change it to 3gb user and 1gb kernel.
Don't try it, just do it!
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With MMF you can spec the start offset and memory block size so you should be able to iterate through the file in say 20 x 1G segments. Certianly worth a try.
Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com
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I have a form with some edit boxes that do validation when they lose focus. I have an error variable (int) that keeps track of whether there was an error when the control lost focus. If there is an error it increases the ref count, and if there is no error it decreases the count. I'm having some trouble wrapping my head around how to work this logically. The system encounters several errors in keeping track. For example if I tab off the first edit and there is an error the count is increased to 1. If on the next box I enter a valid value and tab off the error count is decreased since there was no error. This has the effect of taking the ref count to 0 even though the first box still has an error. The only thing I've come up with so far is to have a boolean flag that is set when the ref is increased inside the function and if it wasn't then I shouldn't decrement it when it loses focus, but I don't really like that idea. Any ideas, links, or pushes in the right directions would be very appreciated. Here is some sample code of the KillFocus
if (VerifyCircuit ()) {
if (0 != m_nFieldError) { DelErrRef (); }
if (0 == m_nFieldError)
GetDlgItem (IDC_ERROR)->ShowWindow (SW_HIDE);
ErrorString (IDC_CIRCUIT_ERROR, FALSE);
}
else {
AddErrRef ();
ErrorString (IDC_CIRCUIT_ERROR);
GetDlgItem (IDC_ERROR)->ShowWindow (SW_SHOW);
} Sorry about the lenghty post.
- monrobot13
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Why not validate the control when it looses focus and if there is an error use PostMessage() to put the focus back on the control and pop up a tooltip or balloon showing the error. Using MessageBox()'s to notify uses is far too in your face and requires user intervention.
Note that to get focus back to a control within KillFocus you can't use SetFocus() to SendMessage(). Hope that helps.
Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com
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Thanks for the reply, but I don't particularly want to code the program that way (keeping the user on a control until it validates). I'm not popping up message boxes to notify the user I'm simply putting a * beside the box with problems.
- Aaron
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Hi,
I have an SDI app that uses a static splitter. One side of the splitter is a class derived from TreeView and the other side is a class from FormView. When the user clicks on a node in the Tree, I need to send information to be displayed to the other view (CFormView).
I don't know how to pass that information. The document will hold the data, I need to tell my FormView derived View to update its controls (mostly text boxes), but I can't seem to figure it out. I have been through all the Splitter and Doc/View examples on the site but I am stumped.
Thanks,
Mike
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One way is to call:
UpdateAllViews( CView* pSender, LPARAM lHint = 0L, CObject* pHint = NULL );
from the TreeView. Set pSender to the TreeView and get its CView::OnUpdate() handler to ignore calls to itself. You can also put lHint to good use.
This is likely the most MFC way to do it.
Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com
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Hi, i'm working in a Win32 app. It's based on a main file, and a class file. The main file has a window which receives events and must create different instances of the class. There is a global list, where some data is saved. When certain message arrived, the new instance of the class must search for the info previously saved in the global list. The files are:
//**Main.cpp**//
include "Main.h"
SomeFunction(PCHAR Data)
{
RecordList.push_back(Data);
....
}
//**Main.h**//
#include "CX.h"
#include <list>
using namespace std ;
typedef list<PCHAR> List;
static List RecordList;
//**CX.h**//
Class X
{
...
}
//**CX.cpp**//
VOID CX::Function()
{
List::iterator i;
PCHAR Data;
i = RecordList.begin();
Data = *i;
....
}
The compiler print error C2065 in each line where the RecordList or the iterator are used. Even in the main file.
I tried including :
#include <list>
using namespace std ;
in the CX files but this doesn't work either
Any idea?
Tnx
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does it works if you remove the static from
static List RecordList
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Problem solved
http://www.codeguru.com/forum/showthread.php?s=ed2cedde3719d44ef58b38b453c2874b&threadid=262363&highlight=global+variable+in+classes
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well, i just started working with MFC, i made a button, and 2 edit boxes, i cant really do anything dynamic yet so how could i make when i click the button it writes moves something from onde edit box to the other?
Compiler: VC++ 6 Enterprise
OS: Windows ME
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make member variables of cstring for each edit box. then
when the button is clicked call
UpdateData(false);
m_strEdit1 = m_strEdit2;
UpdateData(ture);
You need to get a good book on windows control and how to use them.
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for some reason that just clears the contents of both boxes
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i found the problem, i think you go the UpdateData()'s mixed up
you have to do
UdateData(TRUE);
m_edit1 = m_edit2;
UpdateData(FALSE);
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Yeah! I didnt exactly remember which one did what. Any ways good that you figured it out.
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As said before, what I am tying to do is get the letters of all the CD/DVD drives on the users computer using MFC. This is what I have so far:
DWORD Drives = GetLogicalDrives();
CString FormatString;
FormatString.Format("%i",Drives);
DriveControl.SetWindowText(FormatString);
FormatString returns 61... I have no idea why it is returning 61. I am assuming that I am doing it wrong? If anyone could show me how to do this right, that would be great.
-Dev578
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