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100 hundred times per second. Because i get message from server to flash items of list control per second, and the item is picture.
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100 messages per second from the server, or updating up to 100 images per message from the server, which happens once a second? I have to guess the latter, otherwise things would likely be changing too fast for the eye to notice each discrete change.
That being the case, it is likely you do not have all 100 images visible at once, correct? Or they would be rather small, and you would likely lose fidelity. Even if they are all visible at once, you should check to make sure that:
1: Ensuring that it is only trying to draw visible items
2: Not erasing the client/drawing area before drawing the image (if an updated image is the same size as the previous one)
3: Correctly managing invalidated areas (you should only invalidate areas that have changed image data, not the entire rect of the control)
4: Correctly using CustomDraw such that you do not get draw messages for items/subitems that do not need updating, or for images that have not changed from the last update interval.
5: Not doing something naive like creating temporary CString objects (or other unnecessary heap activity) each time a draw request is received
I would start with optimizing your drawing code before you go about trying to optimize how Windows is going to paint your data. (And ignore the git that voted my previous post a "2" without providing a reason.)
Peace!
-=- James
If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
DeleteFXPFiles & CheckFavorites (Please rate this post!)
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Thank a million.
Server sends a flag and client gets it and updates the list control (icon style).Because the item (icon) is drawn by OnCustomDraw one by one, the list control blinks. How to draw items once?
-- modified at 1:37 Friday 31st March, 2006
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You cannot draw all iems at once using CustomDraw (well, you could draw over the entire area, but that is not likely what you want).
You should make sure that you are not drawing any items that do not need to be updated (if not all 100 items are having their images changed), and that you are not erasing the background when doing it. That is where I would suggest you start.
Peace!
-=- James
If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
DeleteFXPFiles & CheckFavorites (Please rate this post!)
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Thanks
modified 28-Sep-16 7:17am.
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Well, you must use a (local) smtp account to send e-mails to yahoo, gmail and other.
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See here.
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"There is no death, only a change of worlds." - Native American Proverb
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Hi.
A DLL is ANSI version(non-source code), create a ANSI window.
my project had ANSI and UNICODE version, how to let my UNICODE project easy and well handle the DLL ANSI window ?
Thanks.
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If you are trying to mix both Ansi and Unicode I would recomend using only MBCS. You are just bound to end up in deep water if you don't. Most of my projects need to deal with Unicode and Ansi, and I have never had a problem with the MBCS. Maybe some of the other posters would be able to give you a better answer.
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Hi all
I am making a file wiping tool.
For data wiping I googled many algorithms one of them is "The Russian GOST P 50739 95"
In this algorithm it is given that:
"1 Logical zeros (0x00 numbers) is overwritten to each byte of each sector for 6th to 4th security level systems. Randomly selected symbols (numbers)are to be overwritten to each byte of each sector for 3rd to 1st security level systems."
Here I am not getting the term "6th to 4th security level systems" and "3rd to 1st Security level systems".
So Please guide me to understand these term.
Thanks
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Is it possible it is refering to the amount of times the algorithm passes over the selected data block? I don't know too much about data wiping, but I do know they will usually wipe the same area more than one time.
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Thanks for your reply
it is fine that this is overwriting more than once.
but my problem is to clarify
"6th to 4th security level systems" and "3rd to 1st Security level systems".
Please guide me.
Thanks
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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.
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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?
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Ctrl + X, just in case 
~RaGE();
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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.
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Ctrl + Shift + X
Nibu thomas
Software Developer
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That sounds good, Ctrl + Shift + X it is :->
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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". 
Seriuosly, Shft + Ctrl + X is a bit too much keys to my taste. I find Ctrl + D better. My 2 cents.
~RaGE();
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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.
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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...
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Please post the sample here (Only the Main code)
Regards,
FarPointer
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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 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 />
if(myRightButton==true){<br />
heading -= 10.0f;
yRotation = heading;<br />
::SetFocus(m_hWnd);<br />
<br />
}<br />
if(myLeftButton==true){<br />
heading += 10.0f;
yRotation = heading;<br />
::SetFocus(m_hWnd);<br />
}<br />
<br />
if(myUpButton==true){<br />
xpos -= (float)sin(heading*piover180) * 0.05f;
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;
zpos += (float)cos(heading*piover180) * 0.05f;
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){
lookUpDown-=20.0f;<br />
}<br />
<br />
if(myPageDownButton==true){
lookUpDown+=20.0f;<br />
}<br />
<br />
<br />
<br />
HRESULT hr;<br />
CoInitialize(NULL);<br />
<br />
try{<br />
hr = cnSURMPtr2.CreateInstance(__uuidof(ADODB::Connection));<br />
if (FAILED(hr))<br />
{<br />
throw _com_error(hr);<br />
}<br />
<br />
hr = rsObjectsPtr.CreateInstance(__uuidof(ADODB::Recordset));<br />
if (FAILED(hr))<br />
{<br />
throw _com_error(hr);<br />
}<br />
<br />
cnSURMPtr2->CursorLocation = ADODB::adUseClient;<br />
<br />
_bstr_t dbLocation(L"");<br />
dbLocation = (L".\\SURM.mdb");<br />
<br />
cnSURMPtr2->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+ dbLocation +";Persist Security Info=False","","",ADODB::adConnectUnspecified);<br />
<br />
rsObjectsPtr->Open("SELECT * from Objects", cnSURMPtr2.GetInterfacePtr(),<br />
ADODB::adOpenDynamic, ADODB::adLockOptimistic, ADODB::adCmdText);<br />
<br />
if(!rsObjectsPtr->ADOEOF){<br />
if(rsObjectsPtr->GetRecordCount()>0){<br />
while (rsObjectsPtr->ADOEOF == false){<br />
_variant_t myCoordinates;<br />
<br />
myCoordinates = rsObjectsPtr->GetCollect(L"Coordinates");<br />
<br />
if(myCoordinates.vt != VT_NULL){<br />
CString myStrCoords;<br />
<br />
myStrCoords = static_cast<char *>(_bstr_t(myCoordinates.bstrVal));<br />
<br />
int myArraySize = (myStrCoords.GetLength()/15);<br />
CString *singleCoord = new CString[myArraySize];<br />
int tokenCounter = 0;<br />
<br />
while(myStrCoords.GetLength()>=15){<br />
singleCoord[tokenCounter] = myStrCoords.Left(15);<br />
myStrCoords.Delete(0,15);<br />
tokenCounter++;<br />
}<br />
<br />
if(tokenCounter==2){<br />
drawLine(singleCoord[0],singleCoord[1]);<br />
}<br />
else if(tokenCounter>2){<br />
drawQuad(singleCoord[0],singleCoord[1],singleCoord[2],singleCoord[3]); <br />
}<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 />
}<br />
catch(...)<br />
{<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 />
}
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 />
<br />
<br />
if (pMsg->message == WM_KEYDOWN)<br />
{<br />
if (pMsg->wParam == VK_RIGHT){
openGLControl.myRightButton = true;<br />
<br />
m_Txt_ObjectTypeName.SetWindowText("Right fired"+(CString)(openGLControl.yRotation));<br />
}<br />
<br />
if (pMsg->wParam == VK_LEFT){
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){
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){
openGLControl.myDownButton = true;<br />
}<br />
if (pMsg->wParam == VK_PRIOR){
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){
openGLControl.myPageDownButton = true;<br />
<br />
}<br />
<br />
}<br />
return CDialog::PreTranslateMessage(pMsg);<br />
}
Above was the code for keypresses... now for the buttons events code
void COpenGLMFCDlg::OnCmdUp() <br />
{<br />
openGLControl.myUpButton = true;<br />
::MessageBox(0,"Up Button Event Fired","Move Forwards",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
<br />
}<br />
<br />
void COpenGLMFCDlg::OnCmdRight() <br />
{<br />
<br />
openGLControl.myRightButton = true;<br />
<br />
<br />
::MessageBox(0,"Right Button Event Fired","Turn Right",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
}<br />
<br />
void COpenGLMFCDlg::OnCmdLeft() <br />
{<br />
openGLControl.myLeftButton = true;<br />
::MessageBox(0,"Left Button Event Fired","Turn Left",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
<br />
}<br />
<br />
void COpenGLMFCDlg::OnCmdDown() <br />
{<br />
openGLControl.myDownButton = true;<br />
::MessageBox(0,"Down Button Event Fired","Move backwards",MB_OK|MB_ICONINFORMATION |MB_DEFAULT_DESKTOP_ONLY);<br />
<br />
<br />
}
This is the onPaint() function
void COpenGLControl::OnPaint() <br />
{ <br />
<br />
glEnable( GL_POLYGON_OFFSET_FILL );<br />
glPolygonOffset( 1.0, 1.0 );<br />
DrawGLScene();<br />
glDisable( GL_POLYGON_OFFSET_FILL );<br />
<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 />
<br />
CWnd::OnPaint();<br />
myRightButton = false;<br />
myLeftButton = false;<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
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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!
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