C / C++ / MFC Discussion Boards

C^hris L^osinger8-Jun-05 4:27

8-Jun-05 4:27

read the numbers using the correct byte order.

there's no way to tell which order is correct from just looking at a set of bytes, though. the information about which numbers are in which order has to come from something external to the bytes themselves. do you have a spec for the file format?

Cleek | Image Toolkits | Thumbnail maker

Re: shape file header reading problem

softtec8-Jun-05 4:44

softtec

8-Jun-05 4:44

yes i have spec of file format
Position Filed Value Type ByteOrder
byte0 filecode 9994 Integer Big
byte4 unused1 0 Integer Big
.
.
.
byte24 FileLength filelength Integer Big
byte 28 version 1000 integer Little
.
.
after reding i got coeect values which have byte order little but incorrect for which have byte order big
bcoz file code should be 9994 and i retrieved 1783600 like .

Re: shape file header reading problem

C^hris L^osinger8-Jun-05 4:50

C^hris L^osinger

8-Jun-05 4:50

then you need to change the byte order on the big-endian values after reading:

void SwabLong(int &v)
{
   int t;
   BYTE* cp = (BYTE*)&v;
   t = cp[0] << 24;
   t |= cp[1] << 16;
   t |= cp[2] << 8;
   t |= cp[3];
   v=t;
}

Cleek | Image Toolkits | Thumbnail maker

Re: shape file header reading problem

softtec8-Jun-05 5:07

softtec

8-Jun-05 5:07

when i used that function i got error 'initializing' : cannot convert from 'void' to 'int'

Re: shape file header reading problem

C^hris L^osinger8-Jun-05 5:13

C^hris L^osinger

8-Jun-05 5:13

the function expects an integer, not a void pointer.

Cleek | Image Toolkits | Thumbnail maker

Re: shape file header reading problem

softtec8-Jun-05 5:27

softtec

8-Jun-05 5:27

thnx Charis now it works correct.thnx 4 ur concern.

ShowWindow

leifmikael8-Jun-05 2:41

leifmikael

8-Jun-05 2:41

My minimized program doesn't display when an alarmfunction in the program call ShowWindow(hwnd, SW_MAXIMIZE);
What's mising? Confused | :confused:

Re: ShowWindow

ddmcr8-Jun-05 3:38

ddmcr

8-Jun-05 3:38

could you be more explicit ? maybe you should try
ShowWindow(hwnd,SW_SHOW)?

"Go as far as you can see,and when you get there you'll see further" - Unknown

Re: ShowWindow

leifmikael8-Jun-05 4:29

leifmikael

8-Jun-05 4:29

I have done a windows prg with an alarm function (checking date and time), then i minimize the prg with the MINIMIZEBOX and the prg should activate and display the window at correct time and date, but it doesnt.t work, I have tried all kind of ShowWindod codes, i think there is something else i'm missing.

Re: ShowWindow

ddmcr8-Jun-05 5:18

ddmcr

8-Jun-05 5:18

can you show the code ?

"Go as far as you can see,and when you get there you'll see further" - Unknown

Re: ShowWindow

leifmikael8-Jun-05 5:48

leifmikael

8-Jun-05 5:48

void checkalarm()
{
getTime(date);
if (notesamling.alarmchecknotesamling (date))
{ShowWindow(hwnd, SW_SHOW);}
}

This is the part of the code that should activate and display the window.

Re: ShowWindow

ddmcr8-Jun-05 5:58

ddmcr

8-Jun-05 5:58

i think the problem is no in the ShowWindow(..) function, i'd suggest you to replace it with simple MessageBox("") function just to check that these functions alarmchecknotesamling(..) , getTime(..) are correctly implemented.

void checkalarm()
{
getTime(date);
if (notesamling.alarmchecknotesamling (date))
{
MessageBox("Whatever");
}
}

"Go as far as you can see,and when you get there you'll see further" - Unknown

Re: ShowWindow

leifmikael8-Jun-05 6:42

leifmikael

8-Jun-05 6:42

I have already tried that and it don't work. But the functions work when the prg window is active and displayed. Isn't true that the prg still working in minimized mode or is there any difference.

Re: ShowWindow

ThatsAlok8-Jun-05 18:04

ThatsAlok

8-Jun-05 18:04

leifmikael wrote:
Isn't true that the prg still working in minimized mode or is there any difference.

Yes program will be working in minized Mode, instead of SW_SHOW try SW_RESTORE.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: ShowWindow

ThatsAlok8-Jun-05 18:05

ThatsAlok

8-Jun-05 18:05

leifmikael wrote:
ShowWindow(hwnd, SW_SHOW);}

Is hwnd is global variable?. Have you check hwnd hold the valid value? Try IsWindow() function to check wheather hwnd point to valid window or not

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: ShowWindow

leifmikael9-Jun-05 0:29

leifmikael

9-Jun-05 0:29

The problem was in the messages handling, i belive. I changed to PeekMessage from GetMessage. is this Ok?

while (true)
{
if(PeekMessage(&message, NULL, 0, 0, PM_REMOVE))
{
TranslateMessage(&message);
DispatchMessage(&message);
}
checkalarm(); // func.to check if the window is to restore
}
return message.wParam;

}

return message.wParam;
}

Child windows

nombrecinq8-Jun-05 2:30

nombrecinq

8-Jun-05 2:30

I'm building a dialog based program, and I already have two dialogs created. What I want to do is launch one of them when a button is pressed. Could somebody point me to a class or function I need? Thanks.

Re: Child windows

ThatsAlok8-Jun-05 2:34

ThatsAlok

8-Jun-05 2:34

nombrecinq wrote:
do is launch one of them when a button is pressed.

you have to handle BN_CLICK message for the BUTTON in your Dialog Class

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Child windows

Bob Stanneveld8-Jun-05 2:51

Bob Stanneveld

8-Jun-05 2:51

I assume that you use MFC.

The following code should do the trick for you:

void CYourDlg1::OnButtonClicked()
{
    CYourDlg2 dlg;
    dlg.DoModal();
}

Hope this helps Smile | :)

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

Re: Child windows

nombrecinq8-Jun-05 14:22

nombrecinq

8-Jun-05 14:22

That was easy enough! Thanks for the help.

Re: Child windows

Bob Stanneveld8-Jun-05 20:23

Bob Stanneveld

8-Jun-05 20:23

You're welcome Big Grin | :-D

Behind every great black man...
... is the police. - Conspiracy brother

Blog[^]

How to Detect Computer Name in VC++

Girish6018-Jun-05 2:21

Girish601

8-Jun-05 2:21

Hello Friends

Can anybody explain me to exactly how to determine the name of the Computer in VC++

Thanks
VC++

Re: How to Detect Computer Name in VC++

ThatsAlok8-Jun-05 2:33

ThatsAlok

8-Jun-05 2:33

vcforums wrote:
how to determine the name of the Computer in VC++

[GetComputerName]

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: How to Detect Computer Name in VC++

David Crow8-Jun-05 2:35

David Crow

8-Jun-05 2:35

Another way is gethostname().

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

GetOpenFileName()

User 5838528-Jun-05 2:13

User 583852

8-Jun-05 2:13

I am having a problem with this function. It always returns FALSE and then CommDlgExtendedError() returns CDERR_INITIALIZATION.

MSDN says CDERR_INITIALIZATION is caused by low memory but I dont think this is the problem. I have rebooted my machine and other apps are able to display this dialog. Originally this code was in a ATL project for a MapPoint Add In. I have copyed it into a simple dialog based MFC app and still have the same problem.

can anyone help?

I have the following

OPENFILENAME ofn;
char szFile[512];

ZeroMemory(&ofn, sizeof(OPENFILENAME));
ofn.lStructSize = sizeof(OPENFILENAME);
ofn.hwndOwner = NULL;
ofn.lpstrFile = szFile;
ofn.nMaxFile = 512;
ofn.lpstrFilter = "All\0*.*\0TT Route Log\0*.TRL\0";
ofn.nFilterIndex = 1;
ofn.lpstrFileTitle = NULL;
ofn.nMaxFileTitle = 0;
ofn.lpstrInitialDir = NULL;
ofn.Flags = OFN_PATHMUSTEXIST | OFN_FILEMUSTEXIST;

BOOL b = GetOpenFileName(&ofn);

DWORD err = CommDlgExtendedError();

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