C / C++ / MFC

30-Mar-06 1:58

Well usually a data wipe is a time consuming process, especially on computers which hold sensetive information. These types of computers can have a very large storage capacity, which when wiping, involves wiping files, free space and the swap.

Obviously the more times you wipe, the more secure your system. Most wiping utilites allow you to set the security level, they do this by adjusting the amount of times they wipe the same data block.

Take the best-crypt wipe utility for example, it offers you an 8 level passover, A level 8 (MOD level) being the highest.

rajeevktripathi wrote:
"6th to 4th security level systems" and "3rd to 1st Security level systems".

I would take a guess here that there are 6 levels invloved. And the 1st to 3rd would be the highest level i.e 3 to 6 passes. But this is only a guess. I would do some googling and find out more about this particular method of wiping.

Just a quickie

Waldermort29-Mar-06 22:05

29-Mar-06 22:05

What Hotkey would you normally associate with Delete or Clear?

MS Word claims it to be 'Del' but I want to use this with Rich text, therefore a hotkey would clear the whole selection, formatting included.

All the Ctrl + ? hotkeys seem to be located on the left of the keyboard, so which would you choose for a Delete?

Rage29-Mar-06 23:09

Rage

29-Mar-06 23:09

Ctrl + X, just in case Smile | :)

~RaGE();

Waldermort29-Mar-06 23:22

29-Mar-06 23:22

That was my first thought, but Ctrl+X is reserved for Cut operations, which would fill the clipboard. I want the users to be able to clear the control and still have tho option of pasting anything they may have previously copied.

I have used Ctrl+D for now, but I was wondering if there was any national standard as with Cut, Copy and Paste.

Nibu babu thomas29-Mar-06 23:49

Nibu babu thomas

29-Mar-06 23:49

Ctrl + Shift + X

Nibu thomas
Software Developer

Waldermort30-Mar-06 0:00

30-Mar-06 0:00

That sounds good, Ctrl + Shift + X it is :->

Rage30-Mar-06 0:06

Rage

30-Mar-06 0:06

waldermort wrote:
Cut operations, which would fill the clipboard.

Sorry, my post was a bad attempt at humour. The "just in case" was supposed to mean "so that we can paste it back in case we did not really want to delete it". Roll eyes | :rolleyes:

Seriuosly, Shft + Ctrl + X is a bit too much keys to my taste. I find Ctrl + D better. My 2 cents.

~RaGE();

Waldermort30-Mar-06 2:01

Re: OpenGL & MFC & setfocus

30-Mar-06 2:01

haha, man I must be way too tired if I didn't notice that. I would agree Ctrl+D is better. At the moment I will leave it as it is and look further into the Richedit hotkeys. I don't want to have to many over-rides.

OpenGL & MFC & setfocus

braveheartkenya29-Mar-06 21:59

braveheartkenya

29-Mar-06 21:59

I have a program where i have created an openGL window within an MFC Dialog using a tutorial on http://steinsoft.net . I have buttons on the Dialog which i want to use to rotate and move (translate) some objects that i have drawn.

I implemented some code from http://nehe.gamedev.net/data/lessons/lesson.asp?lesson=10[^] to allow me to move around the objects.

The code seems to be almost correct, but there seems to be a problem with the focus, coz something is stealing the focus, and thus the events are not getting executed properly.

Could someone please tell me how to get around this.

Your help would be highly appreciated
Thanks in advance

If you need my project to look at it for further clarification, you could post your meail address here and i'll mail it to you...

FarPointer30-Mar-06 2:19

FarPointer

30-Mar-06 2:19

Please post the sample here (Only the Main code)

Regards,
FarPointer

Re: OpenGL &amp; MFC &amp; setfocus

braveheartkenya30-Mar-06 6:04

braveheartkenya

30-Mar-06 6:04

This is the DrawGLScene() function called by onPaint()

void COpenGLControl::DrawGLScene()<br />
{<br />
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);<br />
   glLoadIdentity();<br />
   glRotatef(80.0f,-1.0f,0.0f,0.0f);<br />
<br />
   //GLfloat x_m, y_m, z_m, u_m, v_m;<br />
	GLfloat xTrans = -xpos;<br />
	GLfloat zTrans = -zpos;<br />
	GLfloat yTrans = -walkBias-0.25f;<br />
	GLfloat sceneRoty = 360.0f - yRotation;<br />
<br />
	glRotatef(lookUpDown,1.0f,0.0f,0.0f);<br />
	glRotatef(sceneRoty,0.0f,1.0f,0.0f);<br />
<br />
	glTranslatef(xTrans, yTrans, zTrans);<br />
<br />
   /**/<br />
	//Turn RIGHT<br />
   if(myRightButton==true){<br />
	   	//::MessageBox(0,(CString)yRotation,"Turn Right",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
		//glRotatef(yRotation,0.0f,1.0f,0.0f); // Rotate The Triangle On The Y axis<br />
		heading -= 10.0f; //0.22f;<br />
		yRotation = heading;<br />
		::SetFocus(m_hWnd);<br />
		//DrawGLScene();<br />
		//::MessageBox(0,(CString)yRotation,"Turn Right",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
	}<br />
	//Turn LEFT<br />
	if(myLeftButton==true){<br />
		//::MessageBox(0,(CString)yRotation,"Turn Left",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
		heading += 10.0f;	//0.22f;	<br />
		yRotation = heading;<br />
		::SetFocus(m_hWnd);<br />
		//::SetFocus(this);<br />
		//glRotatef(yRotation,0.0f,1.0f,0.0f); // Rotate The Triangle On The Y axis		<br />
	}/**/<br />
<br />
	if(myUpButton==true){<br />
		xpos -= (float)sin(heading*piover180) * 0.05f;		//0.05f<br />
		zpos -= (float)cos(heading*piover180) * 0.05f;<br />
		if (walkBiasAngle >= 359.0f)<br />
		{<br />
			walkBiasAngle = 0.0f;<br />
		}<br />
		else<br />
		{<br />
			walkBiasAngle+= 10;<br />
		}<br />
		walkBias = (float)sin(walkBiasAngle * piover180)/20.0f;<br />
<br />
		::MessageBox(0,"Moving Forward","Move Forward",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
	}<br />
<br />
	if(myDownButton==true){<br />
		xpos += (float)sin(heading*piover180) * 0.05f;		//0.05f;<br />
		zpos += (float)cos(heading*piover180) * 0.05f;		//0.05f;<br />
		if (walkBiasAngle <= 1.0f)<br />
		{<br />
			walkBiasAngle = 359.0f;<br />
		}<br />
		else<br />
		{<br />
			walkBiasAngle-= 10;<br />
		}<br />
		walkBias = (float)sin(walkBiasAngle * piover180)/20.0f;<br />
<br />
	}<br />
<br />
	if(myPageUpButton==true){	//VK_PRIOR<br />
		lookUpDown-=20.0f;<br />
		//z-=0.02f;<br />
	}<br />
<br />
	if(myPageDownButton==true){	//VK_NEXT<br />
		lookUpDown+=20.0f;<br />
		//z+=0.02f;<br />
	}<br />
 <br />
   //***************************<br />
   // DRAWING CODE<br />
   //***************************<br />
   /**************DATABASE CONNECTION*************/<br />
/*	*/<br />
	HRESULT hr;<br />
	CoInitialize(NULL);<br />
	<br />
	try{<br />
		//Create a pointer to a Connection in memory<br />
		//ADODB::_ConnectionPtr cnSURMPtr;<br />
		hr = cnSURMPtr2.CreateInstance(__uuidof(ADODB::Connection));<br />
		if (FAILED(hr))<br />
		{<br />
			throw _com_error(hr);<br />
		}<br />
		<br />
		//Create a pointer to a Recordset in memory<br />
		hr = rsObjectsPtr.CreateInstance(__uuidof(ADODB::Recordset));<br />
		if (FAILED(hr))<br />
		{<br />
			throw _com_error(hr);<br />
		}<br />
		<br />
		//Set Connection properties<br />
		cnSURMPtr2->CursorLocation = ADODB::adUseClient;<br />
		<br />
		//Generate connection string<br />
		_bstr_t dbLocation(L"");<br />
		dbLocation = (L".\\SURM.mdb");<br />
		<br />
		//Open the connection<br />
		cnSURMPtr2->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+ dbLocation +";Persist Security Info=False","","",ADODB::adConnectUnspecified);<br />
<br />
		//Open Objects recordset<br />
		rsObjectsPtr->Open("SELECT * from Objects", cnSURMPtr2.GetInterfacePtr(),<br />
		ADODB::adOpenDynamic, ADODB::adLockOptimistic, ADODB::adCmdText);<br />
		<br />
		//Read from First to Last Record to load into GLWindow<br />
		if(!rsObjectsPtr->ADOEOF){<br />
			if(rsObjectsPtr->GetRecordCount()>0){<br />
				//Move to the FIRST record<br />
				//rsObjectsPtr->MoveFirst();<br />
				while (rsObjectsPtr->ADOEOF == false){<br />
					//Code to load cordinates in GLWindow<br />
					_variant_t myCoordinates;<br />
					<br />
					//Read from DB<br />
					myCoordinates = rsObjectsPtr->GetCollect(L"Coordinates");<br />
					//myCoordinates = rsObjectsPtr->Fields->GetItem(L"Coordinates")->GetValue();<br />
<br />
					if(myCoordinates.vt != VT_NULL){<br />
						//Change to String and pick each vertex coordinate<br />
						CString myStrCoords;<br />
<br />
						myStrCoords = static_cast<char *>(_bstr_t(myCoordinates.bstrVal));<br />
						<br />
						//if(myStrCoords != ""){<br />
						//Determine array size<br />
						int myArraySize = (myStrCoords.GetLength()/15);<br />
						//CString singleCoord[myArraySize] = new CString[myArraySize];<br />
						CString *singleCoord = new CString[myArraySize];<br />
						int tokenCounter = 0;<br />
						<br />
						//Put each token into an array element <br />
						while(myStrCoords.GetLength()>=15){<br />
							singleCoord[tokenCounter] = myStrCoords.Left(15);<br />
							//myStrCoords.TrimLeft(10);<br />
							myStrCoords.Delete(0,15);<br />
							tokenCounter++;<br />
						}<br />
						<br />
						//Draw the LINES or QUADS<br />
						if(tokenCounter==2){<br />
							//srand(int(time(NULL)));<br />
							drawLine(singleCoord[0],singleCoord[1]);<br />
						}<br />
						else if(tokenCounter>2){<br />
							//srand(int(time(NULL)));<br />
							drawQuad(singleCoord[0],singleCoord[1],singleCoord[2],singleCoord[3]);							<br />
						}<br />
					}//IF statement end bracket<br />
					//Move to next record if not EOF<br />
					rsObjectsPtr->MoveNext();<br />
				}<br />
				if(rsObjectsPtr->BOF){<br />
					rsObjectsPtr->MoveFirst();<br />
				}<br />
				if(rsObjectsPtr->ADOEOF){<br />
					rsObjectsPtr->MoveLast();<br />
				}<br />
			};<br />
		}<br />
	}<br />
	catch(_com_error &e)<br />
	{<br />
		AfxMessageBox(static_cast<char *>(e.Description()));<br />
		//ShowWindow(1);<br />
	}<br />
	catch(...)<br />
	{<br />
		//std::cerr << "Unhandled Exception";<br />
		AfxMessageBox("Unhandled Exception");<br />
	};<br />
<br />
	myRightButton = false;<br />
	myLeftButton = false;<br />
	myUpButton = false;<br />
	myDownButton = false;<br />
	myPageUpButton = false;<br />
	myPageDownButton = false;<br />
	myHomeButton = false;<br />
<br />
   SwapBuffers(dc->m_hDC);<br />
   //::MessageBox(0,"The End","Ha?",MB_ICONINFORMATION | MB_DEFAULT_DESKTOP_ONLY);<br />
}

Since i would like the rotation and translation to happen either by pressing buttons or key-presses, i have the following code: (NB: Without the message boxes it doesn't work, but with them ... it seems to send the focus back to the correct control - which i'm not too sure whether it's the dialog itself or the GLWindow within the dialog)

BOOL COpenGLMFCDlg::PreTranslateMessage(MSG* pMsg) <br />
{<br />
	/*WORKS<br />
	if( pMsg->message == WM_KEYDOWN && (pMsg->wParam == VK_DIVIDE || pMsg->wParam == VK_DELETE) ){<br />
		m_Txt_ObjectTypeName.SetWindowText("Another Event fired");<br />
		AfxMessageBox("Testing");<br />
	*/<br />
<br />
	if (pMsg->message == WM_KEYDOWN)<br />
	{<br />
		if (pMsg->wParam == VK_RIGHT){	//Right button<br />
			//m_Txt_ObjectTypeName.SetWindowText("One More Event fired");<br />
			openGLControl.myRightButton = true;<br />
			//::MessageBox(0,"One more Event fired","My fired Event",MB_ICONINFORMATION |MB_SYSTEMMODAL|MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
			m_Txt_ObjectTypeName.SetWindowText("Right fired"+(CString)(openGLControl.yRotation));<br />
		}<br />
<br />
		if (pMsg->wParam == VK_LEFT){	//Left Button<br />
			//m_Txt_ObjectTypeName.SetWindowText("One More Event fired");<br />
			openGLControl.myLeftButton = true;<br />
			::MessageBox(0,"One more Event fired","My fired Event",MB_ICONINFORMATION |MB_SYSTEMMODAL|MB_DEFAULT_DESKTOP_ONLY);<br />
		}<br />
		<br />
		if (pMsg->wParam == VK_UP){	//UP Button<br />
			//m_Txt_ObjectTypeName.SetWindowText("One More Event fired");<br />
			openGLControl.myUpButton = true;<br />
			::MessageBox(0,"Up Event Fired","Up Event",MB_ICONINFORMATION |MB_SYSTEMMODAL|MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
		}<br />
<br />
		if (pMsg->wParam == VK_DOWN){	//Down Button<br />
			//m_Txt_ObjectTypeName.SetWindowText("One More Event fired");<br />
			//::MessageBox(0,"One more Event fired","My fired Event",MB_ICONINFORMATION |MB_SYSTEMMODAL|MB_DEFAULT_DESKTOP_ONLY);<br />
			openGLControl.myDownButton = true;<br />
		}<br />
		if (pMsg->wParam == VK_PRIOR){	//PageUp Button<br />
			//m_Txt_ObjectTypeName.SetWindowText("One More Event fired");<br />
			openGLControl.myPageUpButton = true;<br />
			::MessageBox(0,"Page Up Event fired","PageUp Event",MB_ICONINFORMATION |MB_SYSTEMMODAL|MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
		}<br />
		if (pMsg->wParam == VK_NEXT){	//PageDown Button<br />
			//m_Txt_ObjectTypeName.SetWindowText("One More Event fired");<br />
			//AfxMessageBox("One More Event fired");<br />
			//::MessageBox(0,"One more Event fired","My fired Event",MB_ICONINFORMATION |MB_SYSTEMMODAL|MB_DEFAULT_DESKTOP_ONLY);<br />
			openGLControl.myPageDownButton = true;<br />
<br />
		}<br />
<br />
	}<br />
	//return TRUE;<br />
	return CDialog::PreTranslateMessage(pMsg);<br />
}

Above was the code for keypresses... now for the buttons events code

void COpenGLMFCDlg::OnCmdUp() <br />
{<br />
	// TODO: Add your control notification handler code here<br />
	openGLControl.myUpButton = true;<br />
  	::MessageBox(0,"Up Button Event Fired"/*+(CString)yRotation*/,"Move Forwards",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
	<br />
}<br />
<br />
void COpenGLMFCDlg::OnCmdRight() <br />
{<br />
	// TODO: Add your control notification handler code here<br />
	<br />
	openGLControl.myRightButton = true;<br />
	/*<br />
	openGLControl.yRotation += 20.0f;<br />
<br />
	*/<br />
<br />
   	::MessageBox(0,"Right Button Event Fired"/*+(CString)yRotation*/,"Turn Right",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
}<br />
<br />
void COpenGLMFCDlg::OnCmdLeft() <br />
{<br />
	// TODO: Add your control notification handler code here<br />
	openGLControl.myLeftButton = true;<br />
  	::MessageBox(0,"Left Button Event Fired"/*+(CString)yRotation*/,"Turn Left",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
	<br />
}<br />
<br />
void COpenGLMFCDlg::OnCmdDown() <br />
{<br />
	// TODO: Add your control notification handler code here<br />
	openGLControl.myDownButton = true;<br />
  	::MessageBox(0,"Down Button Event Fired"/*+(CString)yRotation*/,"Move backwards",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
	<br />
}

This is the onPaint() function

void COpenGLControl::OnPaint() <br />
{	<br />
	// Draw objects with polygon offset.	//So as to get the outlines<br />
	/**/<br />
	glEnable( GL_POLYGON_OFFSET_FILL );<br />
		glPolygonOffset( 1.0, 1.0 );<br />
		//DrawObjects();<br />
		DrawGLScene();<br />
	glDisable( GL_POLYGON_OFFSET_FILL );<br />
<br />
	// Draw smooth anti-aliased outline over polygons.<br />
	glEnable( GL_BLEND );<br />
	glEnable( GL_LINE_SMOOTH );<br />
	glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );<br />
	glPolygonMode( GL_FRONT_AND_BACK, GL_LINE );<br />
		DrawGLScene();<br />
	glPolygonMode( GL_FRONT_AND_BACK, GL_FILL );<br />
	glDisable( GL_LINE_SMOOTH );<br />
	glDisable( GL_BLEND );<br />
	/**/<br />
<br />
	//DrawGLScene();<br />
	<br />
	CWnd::OnPaint();<br />
	myRightButton = false;<br />
	myLeftButton = false;<br />
	// Do not call CWnd::OnPaint() for painting messages<br />
}

I think the issue is something to do with the focus being lost somewhere to some control. onPaint an drawGLscene are in the OpenGLControl functions

Hope this helps...

-- modified at 12:16 Thursday 30th March, 2006

Need your help! About CWebBrowser2.

figer29-Mar-06 21:56

figer

29-Mar-06 21:56

I Get xml files from the internet by using CWebBrowser2 control, now is the question:
How can I save the xml as files on my disks and don't indicate the user?

Now I Get the xml source from CWebBrowser2 by the method CWebBrowser2::ExecWB(OLECMDID_SAVEAS, OLECMDEXECOPT_DONTPROMPTUSER, &vt1, &vt1), is there any way better?

thanks for your answers! Smile | :)

Re: Need your help! About CWebBrowser2.

Sheng Jiang 蒋晟30-Mar-06 11:52

Sheng Jiang 蒋晟

30-Mar-06 11:52

http://msdn.microsoft.com/library/en-us/dnwebteam/html/webteam05072001.asp?frame=true[^]

Regards

Microsoft MVP in Visual C++

http://blog.joycode.com/jiangsheng

Very simple question

hanno2529-Mar-06 21:04

hanno25

29-Mar-06 21:04

Hi!

This is a really easy question, but I dont know the answer:

The text in a AfxMessageBox should look like this:

Sorry, can't found folder "Test" !

Whats the way to give out the ""?? Cry | :((

Thanks

Re: Very simple question

benjymous29-Mar-06 21:08

benjymous

29-Mar-06 21:08

"Sorry, can't find found folder \"Test\"!"

--
Help me! I'm turning into a grapefruit!
Buzzwords!

Re: Very simple question

Trollslayer29-Mar-06 21:49

Trollslayer

29-Mar-06 21:49

"\"Test\""

The tigress is here Big Grin | :-D

[OT]

Rage29-Mar-06 23:12

Rage

29-Mar-06 23:12

it is "Sorry, cannot find the folder \"Test\"". :->

~RaGE();

Why does this simple dynamic array experiment crash?

Cristoff29-Mar-06 20:48

Re: Why does this simple dynamic array experiment crash?

29-Mar-06 20:48

Any ideas why this code crashes with 799 elements or more but it works with 699 or less? I haven't found yet the limit.

<code>#include <malloc.h>
#include <stdio.h>

int main()
{
    /*1000 elements for the array*/
    int n = 699;

    /* Dynamic array */
    int* array = (int*) malloc(sizeof(char) * n);
    if (!array)
    {
        printf("Out of memory");
        return 1;
    }

    for (int i = 0; i < n; i++)
    {
        array[i] = i;
    }

    for (int i = 0; i < n; i++)
    {
        printf("%d, ", array[i]);
    }

	return 0;
}
</code>

-- modified at 2:51 Thursday 30th March, 2006

RockyJames29-Mar-06 21:03

RockyJames

29-Mar-06 21:03

Hey when i tried it is working up to n=980.
anything more than 980 application is crashing.

Re: Why does this simple dynamic array experiment crash?

Cristoff29-Mar-06 21:33

Re: Why does this simple dynamic array experiment crash?

29-Mar-06 21:33

What compiler? I'm using mingw on WinXP Home right now but I could try it later on VS2005 and GCC under Linux but I have to reboot.

This is a text book example. Well I've change it a little bit but it is basically the same.

Taka Muraoka29-Mar-06 21:37

Taka Muraoka

29-Mar-06 21:37

Your array variable is a pointer to int's but you're only allocating enough memory for n char's. char's are smaller than int's so you're running past the end of the memory you've allocated.

0 bottles of beer on the wall, 0 bottles of beer, you take 1 down, pass it around, 4294967295 bottles of beer on the wall.

Awasu 2.2 [^]: A free RSS/Atom feed reader with support for Code Project.

Re: Why does this simple dynamic array experiment crash?

Cristoff29-Mar-06 21:53

Re: Why does this simple dynamic array experiment crash?

29-Mar-06 21:53

damn't it

sorry for the stupid question!

Cristoff29-Mar-06 21:55