C / C++ / MFC Discussion Boards

ns4-Sep-02 7:29

4-Sep-02 7:29

I appreciate both the responses. I implemented the PostQuitMessage(0) since I'd gotten it first and it seems to be doing fine! Thanks for the exit(0) too.
ns Laugh | :laugh:

Accelerator Keys in dialog

DRHuff4-Sep-02 5:50

DRHuff

4-Sep-02 5:50

I have a menu in a dialog but the accelerator keys don't work eg Alt-F does not drop down the file menu.

How do I make it work?

Thanks

Dave

Dave Huff

Igor would you give me a hand with the bags?

Certainly - you take the blonde and I'll take the one in the turban!

Re: Accelerator Keys in dialog

Tomasz Sowinski4-Sep-02 5:56

Tomasz Sowinski

4-Sep-02 5:56

Works for me - I've created dialog-based app, added menus to main dialog and about box and everything works as expected.

Are you playing with PreTranslateMessage?

Tomasz Sowinski -- http://www.shooltz.com

** Putt knot yore thrust inn spel chequers. **

Re: Accelerator Keys in dialog

DRHuff4-Sep-02 6:04

DRHuff

4-Sep-02 6:04

This is not a dialog based app but a dialog called by an SDI app. I am not touching PreTranslateMessage.

Dave Huff

Igor would you give me a hand with the bags?

Certainly - you take the blonde and I'll take the one in the turban!

Re: Accelerator Keys in dialog

Max Santos4-Sep-02 7:44

Max Santos

4-Sep-02 7:44

I made a SDI application that opens a dialog (modal) with a menu.
work fine.

Are you using modeless dialogs?? (i did not try it)

Casa.Sapo.pt

Re: Accelerator Keys in dialog

C^hris L^osinger4-Sep-02 7:55

C^hris L^osinger

4-Sep-02 7:55

for dialogs, you can load the accelerators yourself, in PreTranslateMessage:

/////////////////////////////////////////////////////////////////////////////

BOOL ColorEditWnd::PreTranslateMessage(MSG* pMsg) 
{
   if (m_bUseKBAccel)
   {
      if ((pMsg->message == WM_KEYDOWN) && (pMsg->hwnd == m_hWnd))
      {
         HACCEL hAccel = LoadAccelerators( AfxGetInstanceHandle(), MAKEINTRESOURCE(IDR_EDIT_ACCELS) );
         if (::TranslateAccelerator( m_hWnd, hAccel, pMsg ) )
         {
            // yes, we handled the accel.
            return TRUE;
         }
         else
         {
            return CWnd::PreTranslateMessage(pMsg);
         }
      }
   }

   return CWnd::PreTranslateMessage(pMsg);
}

-c

Gourmet, n:
Anyone whom, when you fail to finish something strange or
revolting, remarks that it's an acquired taste and that you're
leaving the best part.

ImgSource!

Re: Accelerator Keys in dialog

Andreas Saurwein4-Sep-02 12:41

Andreas Saurwein

4-Sep-02 12:41

Please dont suggest loading the accels on every keystroke. Do it in OnInitDialog at least.

int x=1, y=5; 
x^=y^=x^=y; // whats the content of x and y now?
<a href="http://www.codeproject.com/tips/StupidXORTrick.asp" target="_blank">ClickHereForHelp();</a>

Re: Accelerator Keys in dialog

C^hris L^osinger4-Sep-02 12:45

C^hris L^osinger

4-Sep-02 12:45

that step was left to the reader.

thanks for contributing.

-c

"I am angry that so many of the sons of the powerful and well-placed... managed to wangle slots in Reserve and National Guard units...Of the many tragedies of Vietnam, this raw class discrimination strikes me as the most damaging to the ideal that all Americans are created equal and owe equal allegiance to their country."
--Colin Powell

ImgSource!

Re: Accelerator Keys in dialog

Alexandru Savescu4-Sep-02 21:16

Alexandru Savescu

4-Sep-02 21:16

In a dialog based application all keyboard events go to the control that have the focus. If you do not have any control on the form then I am pretty sure it will work. To use keystrokes you must, as Chris said, override the PreTranslateMessage method.

Best regards,
Alexandru Savescu

how to highlight item selected in the listctrl

ns4-Sep-02 4:30

4-Sep-02 4:30

When I click on an item in a listctrl, it doesnt make it highlighted and blue. How do I get this to happen?

Re: how to highlight item selected in the listctrl

Pavel Klocek4-Sep-02 4:36

Pavel Klocek

4-Sep-02 4:36

Has the control focus while it doesnt make the selection highlighted and blue? The selection is not displayed in blue while the control isn't focused if the "Show selection allways" is not set.

Pavel
Sonork 100.15206

Re: how to highlight item selected in the listctrl

ns4-Sep-02 4:48

4-Sep-02 4:48

the "show selection always' did the trick. Many many thanks!
ns

Reading past end-of-file

Haim Yulzari4-Sep-02 4:17

Haim Yulzari

4-Sep-02 4:17

I have a file that I read character by character. However, the file is scattered with '^Z' (control-Z) characters so the process stops at the first of them due to
end-of-file. Is there a way to ignore these characters and continue reading till I
reach the "real" end of the file?

Thanks!

Re: Reading past end-of-file

Tomasz Sowinski4-Sep-02 4:31

Tomasz Sowinski

4-Sep-02 4:31

You need to open the file in binary (not text) mode. Are you using stdio or iostream?

Tomasz Sowinski -- http://www.shooltz.com

** Putt knot yore thrust inn spel chequers. **

Re: Reading past end-of-file

Haim Yulzari4-Sep-02 4:42

Haim Yulzari

4-Sep-02 4:42

Thanks! That solved the problem. (I'm using iostream.)

Smile | :)

Code Request (ExTabCtrl)

Ryszard Krakowiak4-Sep-02 3:42

Ryszard Krakowiak

4-Sep-02 3:42

HI ALL

I'm searching for code posted between 12 Aug 2002 and 19 Aug 2002 on CodeProject.

The article title: Exclusive Drag Drop enabled Tabbed Control

Does anybody have source for this article ??

If yes, please send me it.

NTDLL.DLL write access

Cintch4-Sep-02 3:38

Cintch

4-Sep-02 3:38

I'm having a problem running my executable. The project has compiled and built successfully, but once I try to execute it, I receive the error message "The memory could not be written". If I debug, I receive an Unhandled Exception error, with Access Violation on NTDLL.DLL.
Please help! How do I grant myself write access to this file? I am the administrator of my machine.

Thanks!
Cintia

Re: NTDLL.DLL write access

Tomasz Sowinski4-Sep-02 3:45

Tomasz Sowinski

4-Sep-02 3:45

Cintch wrote:
How do I grant myself write access to this file?

You have a problem with invalid/uninitialized/dangling pointer, not with 'access to ntdll.dll'. Check the call stack when excetpion happens - you should see where's the error.

Tomasz Sowinski -- http://www.shooltz.com

** Putt knot yore thrust inn spel chequers. **

Re: NTDLL.DLL write access

Jon Hulatt4-Sep-02 5:40

Jon Hulatt

4-Sep-02 5:40

Did you feel any temptation to be slightly malicious with that response?

Wink | ;-)

STL is a religeon. Enquiries to Reverend Christian Graus

Re: NTDLL.DLL write access

Tomasz Sowinski4-Sep-02 5:46

Tomasz Sowinski

4-Sep-02 5:46

Jon Hulatt wrote:
Did you feel any temptation to be slightly malicious with that response?

I did Wink | ;)

Tomasz Sowinski -- http://www.shooltz.com

** Putt knot yore thrust inn spel chequers. **

Re: NTDLL.DLL write access

lucy4-Sep-02 8:53

lucy

4-Sep-02 8:53

I had a similar problem when I ran a dialog application which OnPaint is done by OpenGL functions. The project compiles and runs well in Windows 2000, and terminate approperly. but when I ran it in Windows XP, when I close the application, after every object was destructed, I got this NTDLL.DLL write access unhandled exception error. If I debug it, the call stack is full of USER blah blah, and the code is all in assembly.

Could you give me any clue? Thanks!

Re: NTDLL.DLL write access

Tomasz Sowinski4-Sep-02 22:55

Tomasz Sowinski

4-Sep-02 22:55

lucy wrote:
the call stack is full of USER blah blah, and the code is all in assembly.

1) examine *full* stack - below series of USER32 calls, you may find your code

2) try switching between threads using Debug/Threads menu option; there's a chance the crash happened in some background thread and stack doesn't reflect the right context.

Tomasz Sowinski -- http://www.shooltz.com

** Putt knot yore thrust inn spel chequers. **

Update data

Kash4-Sep-02 3:32

Kash

4-Sep-02 3:32

I want to update values in a combo at runtime.
I have a combo box that allows the user to select between "metres" and "feet".The form shows a value in [m].
I want this value to change if and when the user chooses [ft] and I want the choice to be shown in static text next to the edit box.

Any suggestions

Kash

Re: Update data

Jawache4-Sep-02 3:40

Jawache

4-Sep-02 3:40

Alright kash....

Use Class Wizard to attach a CString to the Static Control, and a CComboBoxCtrl to the ComboBox.

Then Use Class Wizard again to catch the Message CBN_SELCHANGE for the ComboBox
in the function generated for that action,

OnSelChange...

int i = m_comboBox.GetCurSel();

switch (i) {
case 0:
m_string = "meters";
case 1:
m_string = "feet";
};

UpdateData(TRUE);

or something like that.

Asim Hussain
e: asim@jawache.net
w: www.jawache.net

Re: Update data

jhwurmbach4-Sep-02 4:50

jhwurmbach

4-Sep-02 4:50

Jawache wrote:
UpdateData(TRUE);

Thats bad!!!
From now on, clicking cancel has changed your data.
This should not happen, because a user that clicks cancel specifically wants to leave the dialog *WITHOUT* change in the data.
But the call to UpdateData() copied the control status of all controls into the corresponding variables. So with cancel, they are changed.

So - do not fill the DDX-variable yourself and call UpdateData()!
Better use a control variable of type CStatic and do a SetWindowText() on it.

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