C / C++ / MFC Discussion Boards

yu-jian13-Nov-12 7:25

13-Nov-12 7:25

But I use the CCriticalSection to lock the m_FrameList, when I am getting the front data from m_FrameList, no others change the m_FrameList. So the pushing an element will be done after pop data.

Re: I am Bemused about std::list<>

Richard MacCutchan13-Nov-12 7:43

Richard MacCutchan

13-Nov-12 7:43

I suspect there is some code in your program that you have not shown us.

One of these days I'm going to think of a really clever signature.

Re: I am Bemused about std::list<>

David Crow13-Nov-12 9:05

David Crow

13-Nov-12 9:05

yu-jian wrote:
pFrameData = m_FrameList.front();

What is pFrameData?

What does the code shown below this have to do with the error?

yu-jian wrote:

But now there is a error happen "erators and references can become invalid." in code, pFrameData = m_FrameList.front();

This is a compiler error?

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Re: I am Bemused about std::list<>

Stephen Hewitt13-Nov-12 16:13

Stephen Hewitt

13-Nov-12 16:13

Can you show some more code? On what line does the error occur?

Steve

PDF Accessing problem

BCN-16312-Nov-12 18:22

BCN-163

12-Nov-12 18:22

I called code as followed

C++

IDispatch* pDisp = NULL;
IPDDomNode* pDocNode = NULL;
AccessibleObjectFromWindow(hPDF, OBJID_NATIVEOM, IID_IDispatch, (void**)&pDisp ); 

hr = pDisp->QueryInterface(IID_IPDDomNode, (void**)&pDocNode);

the problem is pDocNode stands for the current visible page or the entire document?

when take a test, sometimes(when the pdf file is huge)stands for the current visible page, otherwise it stands for the entire document.

I am puzzled on this.

I need your help man.

SendMessage(...) MFC is not working in win 7 enterprise edition

vikuseth12-Nov-12 9:02

vikuseth

12-Nov-12 9:02

Here is my source code for locking my computer screen (Generally we do by pressing win+L)But Here in the below code what i am trying to do is , when user run the exe created by this application 1st the screen will be invisible (which is not happening in case of win+L) then next time when the user interact with the system it will show the user that the screen is locked .

C++

<pre lang="c++">

#include "stdafx.h"

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{
// Turn off monitor

Sleep(500); // Eliminate user's interaction for 500 ms
ret =SendMessage(HWND_BROADCAST, WM_SYSCOMMAND, SC_MONITORPOWER, (LPARAM) 2);
}

LockWorkStation();

return 0;
}

Re: SendMessage(...) MFC is not working in win 7 enterprise edition

Richard MacCutchan12-Nov-12 10:11

Richard MacCutchan

12-Nov-12 10:11

I have just tested this sequence of commands on Windows 7 and it works correctly. Is there something else in your code that you have not shown?

One of these days I'm going to think of a really clever signature.

Re: SendMessage(...) MFC is not working in win 7 enterprise edition

vikuseth12-Nov-12 10:29

vikuseth

12-Nov-12 10:29

no .. i have written everything .. i am using win 7 enterprise edition ..

Re: SendMessage(...) MFC is not working in win 7 enterprise edition

Richard MacCutchan12-Nov-12 10:35

Richard MacCutchan

12-Nov-12 10:35

I just ran the code you provided (after correcting the errors) and it again works fine in my Windows 7 Home Edition.

One of these days I'm going to think of a really clever signature.

Re: SendMessage(...) MFC is not working in win 7 enterprise edition

vikuseth12-Nov-12 10:39

vikuseth

12-Nov-12 10:39

May be its working in Home edition but my question is for enterprise edition .

Re: SendMessage(...) MFC is not working in win 7 enterprise edition

Richard MacCutchan13-Nov-12 0:01

Richard MacCutchan

13-Nov-12 0:01

Are you sure your code is actually running properly? The code that you posted in your original question will not even compile, so there may be some other bugs in your program.

One of these days I'm going to think of a really clever signature.

Re: SendMessage(...) MFC is not working in win 7 enterprise edition

David Crow12-Nov-12 11:18

David Crow

12-Nov-12 11:18

Could it be the video driver? Could your keyboard/mouse be keeping the computer "alive?" Do you have Power Management configured correctly?

Re: SendMessage(...) MFC is not working in win 7 enterprise edition

vikuseth12-Nov-12 23:07

vikuseth

12-Nov-12 23:07

can you please give some hint what shall be the power management for this ?
Please brother do reply soon ..Lots of my work depends on it ..

Re: SendMessage(...) MFC is not working in win 7 enterprise edition

vikuseth14-Nov-12 2:04

vikuseth

14-Nov-12 2:04

@DavidCrow : You are genius man .. Thankxx a lot .. As you said its just because of my Graphics driver . Earlier my graphics driver was not compatible with the hardware .. Now i have installed the new driver .. and the issue is resolved.. Thankxx again ..

Does this way to clear all item from std::map have problem?

yu-jian11-Nov-12 2:47

yu-jian

11-Nov-12 2:47

C++

    std::list<int>    lstDevices;
    ...
    ...
std::list<int>::iterator iter;
std::list<int>::iterator iter2Delete;
for(iter = lstDevices.begin(); iter != lstDevices.end();)
{
    iter2Delete = iter++;
            lstDevices.erase(iter2Delete);
}

Use iter2Delete to save current iterator and then let iter pointer to next item. Then delete current item. Does this way have problem?

Re: Does this way to clear all item from std::map have problem?

Richard MacCutchan11-Nov-12 7:18

Richard MacCutchan

11-Nov-12 7:18

See here[^] for a description and sample code showing how to erase a range of elements.

One of these days I'm going to think of a really clever signature.

Re: Does this way to clear all item from std::map have problem?

yu-jian11-Nov-12 20:50

yu-jian

11-Nov-12 20:50

Hi,

Thank you for your replay, after see this article, I find that I am right.
Thankyou a lot.

C++

#include "stdafx.h"

#include <list>
#include <iostream>

int main( ) 
{
	using namespace std;
	list <int> c1;
	list <int>::iterator Iter;

	c1.push_back( 10 );
	c1.push_back( 20 );
	c1.push_back( 30 );
	c1.push_back( 40 );
	c1.push_back( 50 );
	cout << "The initial list is:";
	for ( Iter = c1.begin( ); Iter != c1.end( ); Iter++ )
		cout << " " << *Iter;
	cout << endl;

	std::list<int>::iterator iter;
	std::list<int>::iterator iter2Delete;
	for(iter = c1.begin(); iter != c1.end();)
	{
		iter2Delete = iter++;
		c1.erase(iter2Delete);
	}

	for (Iter = c1.begin( ); Iter != c1.end( ); Iter++ )
		cout << " " << *Iter;
	cout << endl;
}

Re: Does this way to clear all item from std::map have problem?

Richard MacCutchan11-Nov-12 22:35

Richard MacCutchan

11-Nov-12 22:35

Why not use the features of the class and do it the easy way?

C++

c1.erase( c1.begin(), c1.end( ) );

One of these days I'm going to think of a really clever signature.

Re: Does this way to clear all item from std::map have problem?

Stephen Hewitt12-Nov-12 2:43

Stephen Hewitt

12-Nov-12 2:43

Or just this:

c1.clear();

Steve

Re: Does this way to clear all item from std::map have problem?

yu-jian12-Nov-12 4:06

yu-jian

12-Nov-12 4:06

A good suggestion

Getting pasted test

Hadi Dayvary10-Nov-12 5:20

Hadi Dayvary

10-Nov-12 5:20

Hi
Is there any way to get the pasted text in a dialog?
Any control in the dialog may have the focus.

Regards

www.logicsims.ir

Re: Getting pasted test

Richard MacCutchan10-Nov-12 7:05

Richard MacCutchan

10-Nov-12 7:05

You can read the contents of the clipboard with the GetClipboardData()[^] function, and write it to any control.

One of these days I'm going to think of a really clever signature.

Re: Getting pasted test

Hadi Dayvary10-Nov-12 21:29

Hadi Dayvary

10-Nov-12 21:29

Thanks
But I want to get the text when it's pasted.
I checked WM_PASTE but it is send to the control that has the focus not it's parent CWnd.
My dialog has some control of buttons, edit boxes, list control, ...
so it is posible that any of these controls has the focus (when something is paste)

Regards

www.logicsims.ir

Re: Getting pasted test

Richard MacCutchan10-Nov-12 22:27

Richard MacCutchan

10-Nov-12 22:27

You need to subclass the controls[^] and capture the message that way.

One of these days I'm going to think of a really clever signature.

how can get a disk number of a logical drive?

Le@rner9-Nov-12 20:42

Le@rner

9-Nov-12 20:42

hi all,

i want to the disk number of a logical drive please help me how can i do this.

thanks.

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