Re: char* arr = “Nisse”; ? - C / C++ / MFC Discussion Boards

Re: Problem subclassing list of owner-drawn combobox

Paul Vickery28-May-04 1:22

28-May-04 1:22

OK, I've sussed it. So, for everyone out there who is dying to know what the solution is, here it is:

I have overridden OnChildNotify in my subclassed listbox (CListBoxCS). I have then added the following code:

switch (message)
{
case WM_DRAWITEM:
case WM_MEASUREITEM:
case WM_COMPAREITEM:
case WM_DELETEITEM:
  // don't allow owner-draw operations in the list, but handle them in the combo
  return FALSE;
}
return CListBox::OnChildNotify(message, wParam, lParam, pLResult);

This then causes all the drawing to be handled by the combobox rather than by the subclassed listbox.

"The way of a fool seems right to him, but a wise man listens to advice" - Proverbs 12:15 (NIV)

How to save GDI+ bmp as CMYK color GDI+ bmp

pubududilena27-May-04 23:44

pubududilena

27-May-04 23:44

hi normally GDI+ images are saved as RGB Color Format. But I want to save GDI+ bmp with CMYK Color.
If any one know it please help me. Frown | :(

char* arr = “Nisse”; ?

anderslundsgard27-May-04 23:34

anderslundsgard

27-May-04 23:34

Exactly what happens if I write:

char* arr = “Nisse”;

Can I run:

delete arr;

Or

delete [] arr;

What is the best thing to do?

...and justice for all

APe

Re: char* arr = “Nisse”; ?

Roger Allen27-May-04 23:38

Roger Allen

27-May-04 23:38

The compiler allocates an area of code/data space with the string in it and sets *arr to point to it. Because its allocated by the compiler, it cannot be deleted (its not dynamic). You would get some kind of assertion error in debug and probably a crash in release.

Best thing to do.

Nothing.
Its not a leak.

Roger Allen - Sonork 100.10016
Strong Sad: I am sad I am flying
_{Who is your favorite Strong?}

Re: char* arr = “Nisse”; ?

toxcct27-May-04 23:38

toxcct

27-May-04 23:38

delete[] will call the right destructor for each cell member before destroying the tab itself. prefer it if you have to, but otherwise, it is destroyed automatically by the system at the end of its code block...

TOXCCT >>> GEII power

Re: char* arr = “Nisse”; ?

jmkhael28-May-04 0:55

jmkhael

28-May-04 0:55

delete is for new
delete[] is for new[]

free is for malloc, calloc realloc
Nothing otherwise

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

[Message Deleted]

Naren Neelamegam28-May-04 19:58

Naren Neelamegam

28-May-04 19:58

[Message Deleted]

Re: char* arr = “Nisse”; ?

toroso7328-May-04 21:04

toroso73

28-May-04 21:04

loveablevirus wrote:
So your code,
char* arr = “Nisse”;
may work right at most times... but will make problem at some times.

The code is perfectly legal and will work at all times. "Nisse" will be allocated by the compiler in the global memory segment as a char[6] (null-terminated). arr is a stack variable which is pointing to this global memory. All is safe -- as long as you treat it as a char[6].

And since you have not allocated the memory (with new) you should not do a delete.

Experts pls help ! General question

Member 115017627-May-04 21:49

Member 1150176

27-May-04 21:49

Whar are the other softwares/dependancies that are downloaded when I install Internet Explorer.

One of them will be JVM.

In order to which site can give me any information on this.

Kindly let meknow.

fullscreen dialog control

Bilge Kaan27-May-04 21:30

Bilge Kaan

27-May-04 21:30

hi all

Is it possible to make a control which is inside dialog fullscreen ? Not whole dialog only selected control .

Bilge Kaan

Re: fullscreen dialog control

Ryan Binns28-May-04 0:57

Ryan Binns

28-May-04 0:57

No. The control will be clipped by the dialog. You can set it to whatever size you like, but only the part inside the dialog will be visible.

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

How can i make ComboBox read only

Zeeshan Bilal27-May-04 20:39

Zeeshan Bilal

27-May-04 20:39

HI

How can i make ComboBox readable only ...
no one can enter value in it.

thanx

Re: How can i make ComboBox read only

toxcct27-May-04 21:53

toxcct

27-May-04 21:53

by setting its type property to Drop List

TOXCCT >>> GEII power

A Dialog Box Problem

Imtiaz Murtaza27-May-04 19:37

Imtiaz Murtaza

27-May-04 19:37

Dear Fiends,

I got a child dialog box. Problem is that on pressing the enter key the dialog disappears. What i want is that on pressing the enter key, some button on the dialog gets pressed. How can i do so.

Imtiaz

Re: A Dialog Box Problem

Anthony_Yio27-May-04 19:57

Anthony_Yio

27-May-04 19:57

override your OnOK and OnCancel of your Dialog. And comment out the
CDialog::OnOK() or CDialog::OnCancel()

Just check Michael Dunn FAQ article for detail.

Sonork 100.41263:Anthony_Yio

Life is about experiencing ...

Re: A Dialog Box Problem

Zeeshan Bilal27-May-04 20:36

Zeeshan Bilal

27-May-04 20:36

Make the button Default from the prorpties of whhich u want the functionalty as a defualt on pressing first time ENter key..

may be it works..

Re: A Dialog Box Problem

Ravi Bhavnani28-May-04 2:36

Ravi Bhavnani

28-May-04 2:36

Override OnOK().

CMyDialog::OnOK()
{
  PostMessage (WM_COMMAND, IDC_SOME_BUTTON);
}

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

Re: A Dialog Box Problem [modified]

Naren Neelamegam28-May-04 20:11

Naren Neelamegam

28-May-04 20:11

Create two member functions for you dlg class.
Eg.

void CTestDlg::OnOK()
{
}

void CTestDlg::OnCancel()
{
}

Enough... Go and press any key in ur dialog... it wont close (even ur close button too;))

To close ur dialog Add OnClose() Message Handler to your dlg class

void CTestDlg::OnClose()
{
EndDialog(0);
CDialog::OnClose();
}

now press you close button. It will close Smile | :)

Hava nice day
with regards

loveablevirus

modified on Saturday, January 17, 2009 9:27 AM

Dialog Box Problem

Imtiaz Murtaza27-May-04 19:37

Imtiaz Murtaza

27-May-04 19:37

Fiends,
I got a child dialog box. Problem is that on pressing the enter key the dialog disappears. What i want is that on pressing the enter key, some button on the dialog gets pressed. How can i do so.

Imtiaz

Re: Dialog Box Problem

GDavy27-May-04 19:40

GDavy

27-May-04 19:40

well you could set the focus on that button, when pressing enter that will activate it.
Other way is capturing the WM_KEYDOWN message in pretranslate func and check wParam for VK_RETURN.

Hope this helps you...
Regards,
Davy

Re: Dialog Box Problem

toxcct27-May-04 21:50

toxcct

27-May-04 21:50

Cwnd::SetFocus();

if you use this into OnInitDialog(), you should switch its return value to FALSE.

TOXCCT >>> GEII power

How to set a timer to a dialog

Zeeshan Bilal27-May-04 18:44

Zeeshan Bilal

27-May-04 18:44

HI,

How can i set timer Event to a dialog...

means how can i creat it, set it , kill it ,

any code

plz thanx

Re: How to set a timer to a dialog

Frank K27-May-04 19:36

Frank K

27-May-04 19:36

Hi,

<br />
//Win-Api, send a WM_TIMER(timer_event) message to a window<br />
timer_id = SetTimer(hwnd, timer_event, elapsed_time_ms, NULL)<br />
<br />
//Win-Api, call a function<br />
timer_id = SetTimer(NULL, 0, elapsed_time_ms, function_name)<br />
<br />
//and kill the timer<br />
KillTimer(timer_id)<br />

or this links
for MFC-Timer
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_mfc_CWnd.3a3a.SetTimer.asp[^]

for API-Timer
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/windowing/timers/timerreference/timerfunctions/settimer.asp[^]

HTH
Frank

Re: How to set a timer to a dialog

Member 16246227-May-04 21:18

Member 162462

27-May-04 21:18

If is it mfc application , u can use this

BOOL CTelnetServerDlg::OnInitDialog()
{
… … …
… … …
… … …

SetTimer(100,20000,NULL);

… … …
… … …
… … …
}

BEGIN_MESSAGE_MAP(CTelnetServerDlg, CDialog)
//{{AFX_MSG_MAP(CTelnetServerDlg)
… … …
… … …
… … …

ON_WM_TIMER()
ON_WM_DESTROY()
… … …
… … …
… … …
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

void CTelnetServerDlg::OnTimer(UINT nIDEvent)
{

if (nIDEvent == 100)
{
// TODO: Add your message handler code here and/or call default
}
CDialog::OnTimer(nIDEvent);
}

void CTelnetServerDlg::OnDestroy()
{

KillTimer(100);

CDialog::OnDestroy();

}

the Clear() function

Eversman27-May-04 17:22

Eversman

27-May-04 17:22

Hey,

I have a couple of combo boxes, and When they hit new in the menu, I want it to clear, but when I use the m_varible.clear() command, it only clears the one I have highlighted or the last one I selected.

How do I get it to clear all of them?

Here is the code:

<br />
void CDEPDlg::OnFileNew() <br />
{<br />
	// TODO: Add your command handler code here<br />
		m_type1.Clear();<br />
		m_type2.Clear();<br />
		m_type3.Clear();<br />
		m_type4.Clear();<br />
		m_type5.Clear();<br />
}<br />
<br />

Thanks for any help

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