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graphics in c/c++ kcal22-Apr-04 1:36 kcal 22-Apr-04 1:36  i am using visual studio to make some histogram graphs and pie graphs of standered divation but the programme does not recognize the graphics.h header file. how should i make the graphs and please tell what should i do to this heard file (graphics) graphics in c/c++ Re: graphics in c/c++ Ian Darling22-Apr-04 2:06 Ian Darling 22-Apr-04 2:06  Have a look at Windows GDI instead. You'll be most interested in the DrawLine function, I expect. If you're on a suitably recent version of Windows, GDI+ (or System.Drawing in .NET) might be more suitable. GDI: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winprog/winprog/graphics_device_interface.asp[^] GDI+: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdicpp/GDIPlus/GDIPlus.asp Ian Darling "If we've learned anything from history, it's that those who feed trolls are condemned to repetitive conversations. Or something like that." - Eric Lippert Change Style subsequent on CSlideCtrl AnTri22-Apr-04 1:13 AnTri 22-Apr-04 1:13  How can I change the Style of an CSlideCtrl subsequent? I need this, because some settings cannot be set on the dialog editor...! Problem of setting size and position of scrollbar's thumb bg2sc22-Apr-04 1:06 bg2sc 22-Apr-04 1:06  Thank you for reading this. Now I want to keep the height and position of vertical scrollbar's thumb all the time,so I used this m_ctrlTree' is a TreeListView control) ---------------------------- const int nBar = SB_VERT; SCROLLINFO si = {0}; si.cbSize = sizeof(si); si.fMask = SIF_ALL; m_ctrlTree.GetScrollInfo(nBar, &si); si.nMax = si.nPage * 2; si.nPos = (int)si.nPage/2; m_ctrlTree.SetScrollInfo(nBar, &si, TRUE); ----------------------------- I placed that block in the 'OnPrePaint' event of the tree control and it really works,but problem is that when resizing the TreeListView window or expanding a node, it scrolls madly,perhaps always scrolls to the last record,this is not what I want. Is the calculate method right?And where should I place the SetScrollInfo(nBar, &si, TRUE)to control the Thumb? Best reguards. de BG2SC How do i detect user inactivity ? rallister22-Apr-04 1:02 rallister 22-Apr-04 1:02  Hi, in an application that i'm developping, i need to know if there are some user activities at any given time, such as the mouse being moved or the keyboard being used. Is there any other smarter way to know how, that there are no user activity on the system and how long he was not active. Such a behaviour is used by application for IM, when they set the "away" message ! Thanks in advance for any hints and best regards Richard Re: How do i detect user inactivity ? jmkhael22-Apr-04 1:10 jmkhael 22-Apr-04 1:10  Check OnIdle( LONG lCount ); for MFC Papa while (TRUE) Papa.WillLove ( Bebe ) ; Re: How do i detect user inactivity ? rallister22-Apr-04 1:18 rallister 22-Apr-04 1:18  Hi, i'm not using mfc in my application ;o) ! So please provide a solution without mfc ! Thx in advance and best regards Richard Re: How do i detect user inactivity ? jmkhael22-Apr-04 1:48 jmkhael 22-Apr-04 1:48  From MSDN about OnIdle OnIdle is called in the default message loop when the application’s message queue is empty. Use your override to call your own background idle-handler tasks. Why not do the "same" in your main loop? When no messages are being treated treat Call an OnYourIdle Function Papa while (TRUE) Papa.WillLove ( Bebe ) ; Re: How do i detect user inactivity ? David Crow22-Apr-04 2:19 David Crow 22-Apr-04 2:19  Check out GetLastInputInfo(). "The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998) Re: How do i detect user inactivity ? hasansheik22-Apr-04 3:21 hasansheik 22-Apr-04 3:21  If you are using MFC based application u can track it by overriding OnIdle method of CWinApp class. for direct win32 application u can use WinProc method to track any message is posted on the message queue of the application. One Best method is, Through Hook. write a WH_MESSAGE hook and do your work fine I hope it will help you thanks Re: How do i detect user inactivity ? V.22-Apr-04 3:28 V. 22-Apr-04 3:28  Maybe one note on the onidle loop. It will use a lot of cpu % usage! You can solve this by setting a start time in your onidle (and then tell it to stop working) and starting a thread which will test this starttime against the currenttime. if a certain time has passed ... (take some action). Put a Sleep in your thread to keep the cpu % usage down. Have fun ... Re: How do i detect user inactivity ? peterchen22-Apr-04 4:25 peterchen 22-Apr-04 4:25  As already suggested, GetLastUserInputInfo() on W2K+ systems. Otherwise you could modify the main message loop, and take the time stamps of hincoming mouse/keyboard messages. Another option would be a Mouse/Keyboard hook inside your process, that simply resets a timer. This seems the most independent solution (and not too complicated), but personally I would avoid a hook unless it's the only way. or you just check if the space key is permanently down, and there are snoring noises from the MIC IN. Flirt harder, I'm a Coder mlog || Agile Programming | doxygen Re: How do i detect user inactivity ? Rick York22-Apr-04 10:12 Rick York 22-Apr-04 10:12  This article demonstrates one method : http://www.codeproject.com/dll/trackuseridle.asp[^] __________________________________________ a two cent stamp short of going postal. Shell question (I Guess) Deian22-Apr-04 0:47 Deian 22-Apr-04 0:47  I want to be able to display properties for file or folder, as we do when right-clicking over file or folder, I have to display this shell dialog (shell dialog I Guess), but my search in msdn and here at CP does not give any results. Does anyone know how to do that or have information link? Thanks in Advance! Re: Shell question (I Guess) _Magnus_22-Apr-04 1:00 _Magnus_ 22-Apr-04 1:00  Try ShellExecute with the verb "Properties" /Magnus - I don't necessarily agree with everything I say Re: Shell question (I Guess) Deian27-Apr-04 4:07 Deian 27-Apr-04 4:07  Doesent seem to work Bizzare problem reading large number of files Raul00722-Apr-04 0:34 Raul007 22-Apr-04 0:34  Following is the code snippet i am working with. miNumDataFile denotes number of datafiles msarrDataFile[iloop] denotes the file path and name. I am opening around 3000 fines in binary mode and reading all the records in each file using fread. total file size around 187mb with 1366218 rows. its a simple c exe. on the first run it takes 48 secs. on the seond run it takes 2 secs!!!!!!!!!. my question is why is happening. each time i reboot my pc the same phenomenon happens. WHY?????? for(int iloop=0;iloop Re: Bizzare problem reading large number of files jmkhael22-Apr-04 0:38 jmkhael 22-Apr-04 0:38  The OS does a caching for you does it bother you? Papa while (TRUE) Papa.WillLove ( Bebe ) ; Re: Bizzare problem reading large number of files Raul00722-Apr-04 18:17 Raul007 22-Apr-04 18:17  Thanks Papa for your reply. I was not sure what was happening. Now even if the OS is doing the caching part, I have 2 questions. Will this happen in every OS. and further more some times it takes 1-2 secs to read files (total size 200 MB). that whats bothers me. 1/2 secs is really low, for reading and processing 200MB file wont you think!! Anyway i am planing it run this component on a web sever. and a page will call this to show the results of this component. thats why i am so worried about this thing.. Thanks a lot anyway... Apratim Clicking in Edit Box Creates Error.. AbinThomas22-Apr-04 0:22 AbinThomas 22-Apr-04 0:22  hi, i created a simple editbox derived from CEdit class. its working , but clicking in the edit box sets out the devil. The program shuts down after showing the message 'Debug Assertion Failed " Abort-Retry-Ignore. Another problem is that i can't type characters more than the length of the editbox. I wrote a message to handle the keypress event, using ON_EN_CHANGE(IDC_ED,OnEditKeyDown). but am not getting the 'enter' key. the edit box is deleted in the killfocus event.. CAN ANYBODY HELP PLEASE ? thanks in advance.. ---------------- here goes the code----------- -----edit box creation on pressing F4 key----- case VK_F4: { CMainFrame* pMainWnd = (CMainFrame*) AfxGetMainWnd(); pEdit = new CEdit; pEdit->Create(ES_AUTOVSCROLL | ES_WANTRETURN | WS_CHILD | WS_VISIBLE |WS_TABSTOP | WS_BORDER, CRect(0,col+(m_nCurSel*2),75,col+(m_nCurSel*2)+17), this, IDC_ED); pEdit->SetLimitText(50); pEdit->SetFocus(); } ------ function that receives keypress--- void CMarketWatchView::OnEditKeyDown(UINT nChar) { static const MSG* pMsg = GetCurrentMessage(); if(pMsg->wParam==0x0D) //checkfor enter key { AfxMessageBox("Enter key"); - other code here- } pEdit->SetFocus(); } ---------lost focus function for the edit box ---- void CMarketWatchView::OnEditKillFocus() { char buf[50]; pEdit->GetWindowText(buf,49); --other code here-- Invalidate(FALSE); //redraw delete pEdit; } Re: Clicking in Edit Box Creates Error.. wb22-Apr-04 0:57 wb 22-Apr-04 0:57  maybe you post the complete code here? Re: Clicking in Edit Box Creates Error.. AbinThomas22-Apr-04 1:57 AbinThomas 22-Apr-04 1:57  b coz, i want the edit box to be dstroyed when it loses the focus. the user can press F4 key again to create it. it will b good if edit box disappears, when user hits Enter key. thanks this is the code AbinThomas22-Apr-04 1:47 AbinThomas 22-Apr-04 1:47  -----edit box creation on pressing F4 key----- case VK_F4: { CMainFrame* pMainWnd = (CMainFrame*) AfxGetMainWnd(); pEdit = new CEdit; pEdit->Create(ES_AUTOVSCROLL | ES_WANTRETURN | WS_CHILD | WS_VISIBLE | WS_TABSTOP | WS_BORDER, CRect(0,col+(m_nCurSel*2),75,col+(m_nCurSel*2)+17), this, IDC_ED); pEdit->SetLimitText(50); pEdit->SetFocus(); } ------ function that receives keypress--- void CMarketWatchView::OnEditKeyDown(UINT nChar) { static const MSG* pMsg = GetCurrentMessage(); if(pMsg->wParam==0x0D) //checkfor enter key { AfxMessageBox("Enter key"); - other code here- } pEdit->SetFocus(); } ---------lost focus function for the edit box ---- void CMarketWatchView::OnEditKillFocus() { char buf[50]; pEdit->GetWindowText(buf,49); --other code here-- Invalidate(FALSE); //redraw delete pEdit; } Re: this is the code jmkhael22-Apr-04 1:50 jmkhael 22-Apr-04 1:50  Why are you killing the edit in the OnEditKillFocus? Papa while (TRUE) Papa.WillLove ( Bebe ) ; Re: this is the code Steve S22-Apr-04 1:58 Steve S 22-Apr-04 1:58  I'd guess that they want to implement 'in-place' editing of text in a view, and clicking somewhere else is intended to complete/cancel the edit, collapsing the box. Of course, that's only based on a glimpse of the code fragment, so I could be completely wrong Steve S

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