allocator implementation - C / C++ / MFC Discussion Boards

CPallini27-Feb-08 3:17

27-Feb-08 3:17

int iSel = SendMessage(hCombo, CB_GETCURSEL, 0,0);
if (iSel != -1) 
{
  SendMessage(hCombo, CB_GETLBTEXT,  iSel, (LPARAM) buffer);
  SendMessage(hEdit, WM_SETTEXT, 0, (LPARAM) buffer);
}

Where buffer is a (properly sized) TCHAR array.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

Re: clear the list box

bhat27-Feb-08 3:22

bhat

27-Feb-08 3:22

Hey i am not getting ......
where should i add these lines ......i mean to say on which control's event

AbidBhat

Re: clear the list box

bhat27-Feb-08 3:30

bhat

27-Feb-08 3:30

Thanks Pallani i got it ......it is nice to help me ......thank u once again

AbidBhat

Re: clear the list box

CPallini27-Feb-08 3:33

CPallini

27-Feb-08 3:33

bhat wrote:
Thanks Pallani i got it ......it is nice to help me ......thank u once again

Actually is Pallini, anyway... You're welcome.
Smile | :)

Re: clear the list box

Hamid_RT27-Feb-08 4:58

Hamid_RT

27-Feb-08 4:58

I think you said where's George and now its on the previous thread. Laugh | :laugh:

Re: clear the list box

CPallini27-Feb-08 5:10

CPallini

27-Feb-08 5:10

Yes, he's back!
Big Grin | :-D

Re: clear the list box

Hamid_RT27-Feb-08 5:18

Hamid_RT

27-Feb-08 5:18

He's back with two questions. Smile | :)

allocator implementation

George_George27-Feb-08 2:18

George_George

27-Feb-08 2:18

Hello everyone,

I have debugged into STL implementation for allocator in file xmemory (Visual Studio 2008). I found it has not data members, the same as its base class _Allocator_base. Is that correct?

http://msdn2.microsoft.com/en-us/library/6s8wyf7c.aspx

My questions is what is the purpose of copy? It always returns true. Here is the code,

you can see do nothing for copy constructor as well.

allocator(const allocator<_Ty>&) _THROW0()
{
    // construct by copying (do nothing)
}

		// allocator TEMPLATE OPERATORS
template<class _Ty,
	class _Other> inline
	bool operator==(const allocator<_Ty>&, const allocator<_Other>&) _THROW0()
	{	// test for allocator equality (always true)
	return (true);
	}

thanks in advance,
George

Re: allocator implementation

David Crow27-Feb-08 5:22

David Crow

27-Feb-08 5:22

From whence comes your question(s)?

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: allocator implementation

George_George27-Feb-08 18:24

George_George

27-Feb-08 18:24

Hi DavidCrow,

Do you mean I have not made myself understood in the question? If yes, please feel free to let me know and I will rewrite my question to make it convenient in this forum. Smile | :)

Sorry, English is not my native language.

regards,
George

Re: allocator implementation

David Crow28-Feb-08 2:26

David Crow

28-Feb-08 2:26

George_George wrote:
Do you mean I have not made myself understood in the question?

No, that's not what I meant at all.

Re: allocator implementation

George_George28-Feb-08 14:22

George_George

28-Feb-08 14:22

What is your confusion, DavidCrow? I am learning allocator and have some concept level questions. Any ideas?

regards,
George

Re: allocator implementation

David Crow28-Feb-08 16:25

David Crow

28-Feb-08 16:25

George_George wrote:
Any ideas?

None whatsoever.

Dynmaic created CMyView, how to update the context menu item UI?

followait27-Feb-08 1:49

followait

27-Feb-08 1:49

Simply adding ON_UPDATE_COMMAND_UI doesn't work.
Thanks.

Re: Dynmaic created CMyView, how to update the context menu item UI?

Mark Salsbery27-Feb-08 7:14

Mark Salsbery

27-Feb-08 7:14

I just go through the menu items using GetSubMenu()/EnableMenuItem() to enable or disable
items before calling TrackPopupMenu().

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

OS Threads Scheduling

reza matinnejad27-Feb-08 1:38

reza matinnejad

27-Feb-08 1:38

I want to enforce the OS, not to suspend a special thread during execution a set of operations, in a ,multithread program in c++.(all of my threads has the Realtime priority)
OS: WinXP
IDE: VS 2005

Re: OS Threads Scheduling

Cedric Moonen27-Feb-08 1:55

Cedric Moonen

27-Feb-08 1:55

I'm not sure I understand your question very well. What you would like to do is in fact that when you process a certain set of operations, disable thread switching (so that no other thread is processed until you have finished to process your set of operations). Is that what you want to do ?

If yes, then I'm almost certain you can't do that. But there are other mean to achieve a similar result: if the only thing you want to do is to avoid that two threads of your program access the same 'resource' (whatever it might be) at the same time, then you can simply use a critical section to protect the access of said resource.

Cédric Moonen
Software developer

Charting control [v1.3 - Updated]

Re: OS Threads Scheduling

reza matinnejad27-Feb-08 2:08

reza matinnejad

27-Feb-08 2:08

Actually i am working on my program performance.
I want to know how much does it take to execute a set of operations in a thread,
when 6 threads are running the same set of operations.
I hace a timer for each thread, which starts at the beginning of these operations and
stops at the end of these operations.
but because of time slicing the timer value does not show the time executed by the same thread.

Re: OS Threads Scheduling

pbraun27-Feb-08 9:32

pbraun

27-Feb-08 9:32

You would need to add functionality to the operating system scheduler to accomplish this and since Microsoft operating systems are closed source, it is doubtful at best that you would be able to see and modify the source for your intended purpose.

What is the reason that the thread operations are critical? Is it that they need to be executed in order? Do they need to be executed one right after another? If yes is the answer to either of the last two questions, then critical sections is the answer your looking for.

Phil

How to integrate *.htm in MFC program?

TooShy2Talk27-Feb-08 0:02

TooShy2Talk

27-Feb-08 0:02

Hi,

I wanted to interface an *.htm to my VC++ MFC program but I don't know how. Do I need a container for it?
Is it possible to place in a CView?
How will i implement it?

If you knew of a thread, please let me know.

Hope somebody can help me with this.
Thank you.

Re: How to integrate *.htm in MFC program?

Maxwell Chen27-Feb-08 0:09

Maxwell Chen

27-Feb-08 0:09

To display HTML documents?

Maxwell Chen

Re: How to integrate *.htm in MFC program?

Rajesh R Subramanian27-Feb-08 0:16

Rajesh R Subramanian

27-Feb-08 0:16

TooShy2Talk wrote:
I wanted to interface an *.htm to my VC++ MFC program

Hans Dietrich has written a few wonderful articles[^] on these lines. Smile | :)

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: How to integrate *.htm in MFC program?

Demian Panello27-Feb-08 1:42

Demian Panello

27-Feb-08 1:42

You should see the CHtmlView class.

Demian.

"I have always wished that my computer would be as easy to use as my
telephone. My wish has come true. I no longer know how to use my telephone."
-Bjarne Stroustrup, computer science professor, designer of C++
programming language (1950- )

Re: How to integrate *.htm in MFC program?

Hamid_RT27-Feb-08 5:05

Hamid_RT

27-Feb-08 5:05

See CDHtmlDailog.

Paint problems during scrolling

misha_grewal26-Feb-08 23:26

misha_grewal

26-Feb-08 23:26

I have a CTreeCtrl derived class which does heavy custom drawing for various styles.
One of the style is "Right justified" item, that is a tree item should be drawn at the right most corner of the window. Its an hyperlink as well.

I have handled NM_CUSTOMDRAW, and I do painting in PrePaint and say a Skip Default to prevent the custom drawn items to be painted again.

The code looks like this (Excerpt only)

GetItemRect(hItem, textRect, TRUE); //this gets the rect for text only <br />
 GetItemRect(hItem, itemRect, FALSE); //get the text for full item area<br />
<br />
 if ( itemStyle is Right Justified ) {<br />
<br />
               // subtract offset for right justified<br />
               itemRect.right -= _offsetRTJustifed;<br />
<br />
               itemRect.left = itemRect.right - textRect.Width();<br />
<br />
               pDC->DrawText(sItemText, &itemRect, DT_LEFT);<br />
}

This right justified item is added under a root item and appears when user expands that root item. When the user plays around with the tree items, expanding and collapsing often, the vertical scroll bar appears and disappears as per the number of tree items. Due to this scroll bar appearing/disappearing, the painting of this right justified item gets garbled.

(It seems as if the paint messages are lost in between very frequent scroll bar displays/removals)..

Its difficult to suggest, but would appreciate if somebody has a clue about it..

Thanks

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