C / C++ / MFC

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Extracting features from a BMP Russel Hawkins31-Jul-01 10:57 Russel Hawkins 31-Jul-01 10:57  Has anyone got experiance with extracting features from a bitmap image. Re: Extracting features from a BMP Chris Losinger31-Jul-01 11:18 Chris Losinger 31-Jul-01 11:18  what do you mean by "features" ? -c ------------------------------ Smaller Animals Software, Inc. http://www.smalleranimals.com Re: Extracting features from a BMP Russel Hawkins31-Jul-01 21:36 Russel Hawkins 31-Jul-01 21:36  Yes I guess my question was rather broad. What I have is two finger print bitmaps that I would like to compare the connection points to. This is not generalized graphics but rather a science of forensics. There are books available on the subject, there seems to be no code guidelines available on who to do this in C++. Can you help. Reading int/long lengths from binary file 31-Jul-01 10:08 31-Jul-01 10:08  Sorry to ask again but how do I read INTEGER or LONG length values in from a binary file? At the moment I can only get single bytes. Do I use GET or READ? How to I modify the following code to read an integer length value from address 4110 in the DAT file? ============================================== ofstream path("c:\\windows\\desktop\\debug.dat"); ........................ int pos = 4110; path.seekg(pos); int bytevalue = path.get(); ================================================ Sorry to be dumb, tried to work it out myself but failed (& no online helpfile) cheers Richard Edwards Re: Reading int/long lengths from binary file Paolo Messina31-Jul-01 10:45 Paolo Messina 31-Jul-01 10:45  Hi, I'm not sure, since I don't often use C++ streams to do I/O, but it seems you should use: path.read((char*)&myInt, 4); if you're using ifstream. Paolo ------ "airplane is cool, but space shuttle is even better" (J. Kaczorowski) IEnumIDList and Next usage 31-Jul-01 9:34 31-Jul-01 9:34  Hi all, When I use the code below to enumerate the shell namespace, a second thread seems to get started by the IEnumIDList::Next(...) function. This function executes normally and gives me the desired results, but for some reason when my program exits, the second thread (not the application thread) always terminates with a return code of -1 and not 0 (like the main thread). This second thread delays the termination of my program quite considerably and is rather annoying. It would seem to suggest that I'm not using IEnumIDList properly, because if I take out the while(...) loop with the ::Next(...) call in it, the second thread never appears. So, my question is, what is wrong with the following call? What am I not doing to stop this second thread that appears out of nowhere?? ------ CODE ------- void CFileTreeView::OnInitialUpdate() { HTREEITEM rNode; ITEMIDLIST *pidl; IShellFolder *pShellRoot; DWORD iGot; // Called inherited constructor. CTreeView::OnInitialUpdate(); // Clear the view. GetTreeCtrl().DeleteAllItems(); // Get a pointer to the IShellFolder namespace. pShellRoot = GetDocument()->GetShellRoot(); // Iterate through the shell namespace for devices. if(SHGetSpecialFolderLocation(m_hWnd, CSIDL_DESKTOP, &pidl) == NO_ERROR) { rNode = AddNode( pShellRoot, pidl, pidl ); IEnumIDList *pidlList; if(pShellRoot->EnumObjects(m_hWnd, SHCONTF_FOLDERS | SHCONTF_INCLUDEHIDDEN, &pidlList) == NO_ERROR) { while( pidlList->Next(1, &pidl, &iGot) == NO_ERROR ) AddNode( pShellRoot, pidl, pidl, rNode ); pidlList->Release(); } GetTreeCtrl().Expand( rNode, TVE_EXPAND ); } else AfxMessageBox("SHGetSpecialFolderLocation() failed! No namespace!"); GetDocument()->ReleaseShellRoot(); } The AddNode(...) function simply fills out a TV_ITEM structure and creates a node, I am aware that the pidl's from the IEnumIDList(...) are not freed, they are dealt with in an OnDelete() handler for the individual tree nodes. GetShellRoot() and ReleaseShellRoot() simply wrap the AddRef() and Release() functions for IShellFolder and display TRACE messages if I forget to release an instance. Any help would be appreciated. Jonathan Thorpe Resizing List Control Columns Scott Evans31-Jul-01 9:13 Scott Evans 31-Jul-01 9:13  Hello All! I am perplexed and am hoping that someone out there could help me figure this out. I have an application that uses a CListCtrl. When the application window is resized, I would like to dynamically resize each of the columns to fit the view. I have had a little success, however, as the application is resizing, the horizontal scroll bar flickers on and off as the columns are being resized . This happens only when I have "show window contents while dragging" enabled in Windows, when this is turned off you don't notice the problem. What I am trying to do is similar to Outlook where the columns are resized as the window is resized. Please help, as I have exhausted all resources trying to find an answer to this, but have had no success. Warm Regards, Scott Evans Re: Resizing List Control Columns Tomasz Sowinski31-Jul-01 9:21 Tomasz Sowinski 31-Jul-01 9:21  Need more detailed info - post your OnSize handler or routine you're using to change the widths. Tomasz Sowinski -- http://www.shooltz.com Re: Resizing List Control Columns Paolo Messina31-Jul-01 10:33 Paolo Messina 31-Jul-01 10:33  Hi, It could be that you're resizing when the scrollbar has already been shown. Try to do it in OnSizing (WM_SIZING) or try to SetRedraw(FALSE) before, then SetRedraw(TRUE) after the resizing process. Hope this helps, Paolo. ------ "airplane is cool, but space shuttle is even better" (J. Kaczorowski) Setting font used by TextOut 31-Jul-01 7:18 31-Jul-01 7:18  I'm writing a DirectDraw program that has a menu at the start from a template. The author of the template uses TextOut(hDC, MENU_XBEG, MENU_YBEG, szItem, lstrlen(szItem)); to print out a menu item. I would like to change the size and typeface of the font. How would I accomplish this? SetFont()? Thanks for the assistance, Ryan Re: Setting font used by TextOut Tomasz Sowinski31-Jul-01 7:39 Tomasz Sowinski 31-Jul-01 7:39  First you need to create font. Use CreateFont or CreateFontIndirect for that. Next, you need to make your font 'selected' with SelectObject. You should call DeleteObject when you no longer need the font. I think tyou should read "Font Creation and Selection" in "Platform SDK : Windows GDI" docs before coding. These docs should be installed with your VC++ help. Tomasz Sowinski -- http://www.shooltz.com DISPLAY AMOUNTS WITH COMMAS 31-Jul-01 7:02 31-Jul-01 7:02  does anybody knows how to display an amount with commas? wibi Re: DISPLAY AMOUNTS WITH COMMAS Ben Burnett31-Jul-01 14:36 Ben Burnett 31-Jul-01 14:36  Check GetNumberFormat() or GetCurrencyFormat() in your doc's. Ben Burnett --------- On the topic of code with no error handling -- It's not poor coding, it's "optimistic" Re: DISPLAY AMOUNTS WITH COMMAS Bret Faller3-Aug-01 10:02 Bret Faller 3-Aug-01 10:02  Also look at COleCurrency. Works like COleDateTime and has a format function that will return a currency in the locale form (such as commas for japan or . if in the US) Bret Faller Odyssey Computing, Inc. change text color in a combo box 31-Jul-01 6:34 31-Jul-01 6:34  I have created a onctlcolor function to change to text color of my controls. but i can not change the text color in the combo box. Is there another funtion to do this? Thank you Problem with Cristi Posea's CSizingControlBar Jamie Nordmeyer31-Jul-01 6:20 Jamie Nordmeyer 31-Jul-01 6:20  I have (so far) a default MDI app with a CSizingControlBarG derived bar docked on the left side of my frame. Since it's the default MDI implementation (the one created by AppWizard), I have a menu, one toolbar, and a status bar. When I begin a resize operation on the control bar, the splitter shows up as it should, but is drawn on top of the toolbar, and doesn't go all the way to the status bar. So, the splitter is the correct length, but it's shifted up by the height of the toolbar (seemingly). How do I fix this, so it draws from the bottom of the toolbar (instead of over it) down to the status bar? Thanks in advance. Jamie Nordmeyer Portland, Oregon, USA Jamie Nordmeyer Portland, Oregon, USA CFtpFileFind 31-Jul-01 6:13 31-Jul-01 6:13  hello hsa anyone worked with this class? it causes me a lot of troubles, sometimes it doesnt find existing files and sometimes the CFtpFileFind::IsDirecory() is not working... pliz help? are there any other alternatives to this class? thanks RG set text color of a combo box 31-Jul-01 5:50 31-Jul-01 5:50  I have created an OnCtlColor function to set the colors of my text boxes, labels,listbox and combo boxes. It works fine with all but the combo box. Can the text color of a combo box be modified? If so how can it be done? Thank you Sending Messages 31-Jul-01 5:05 31-Jul-01 5:05  I am trying to send messages to a process I created using CreateProcess(). For the send function I need a HWND handle of the process' main Window. How can I optain this handle from what I know after calling CreateProcess()? LP Re: Sending Messages Tomasz Sowinski31-Jul-01 9:16 Tomasz Sowinski 31-Jul-01 9:16  There's no general method for that - CreateProcess can spawn the windowless process, after all. You should use WaitForInputIdle with handle of the child process to give it a time to create its main window, and FindWindow to get the HWND of this window. You'll need the window class name, use Spy++ if you don't know what's the class name. Tomasz Sowinski -- http://www.shooltz.com Re: Sending Messages 31-Jul-01 12:03 31-Jul-01 12:03  Thank you LP ActiveX CView and OpneGL 31-Jul-01 4:52 31-Jul-01 4:52  Hi, I have an MFC MDI app that I have used to develop a CView derived class that does some pretty involved OpenGL rendering. Nothing heavy computationally, just very focussed on a customers needs. I now need to apply what I have done in such a way that it can be wrapped by an ActiveX control. Aside from buying a good book, that I naturally intend to do, can anyone tell me if it possible to reuse the CView derived class Any pointers would be greatly appreciated to get me going until the book arrives... Matthew Re: ActiveX CView and OpneGL Not Active31-Jul-01 15:35 Not Active 31-Jul-01 15:35  Yes you should be able to reuse this by wraping it in a MFC ActiveX. The book would be the best to help you, I like to avoid using MFC and ActiveX in the same sentence. Damn! Did it twice.;) Re: ActiveX CView and OpneGL Jonathan de Halleux30-Oct-01 1:14 Jonathan de Halleux 30-Oct-01 1:14  Check this site: http://www.wzw.tu-muenchen.de/~syring/ActiveX/ Jonathan de Halleux, Belgium. Statusbar icon 31-Jul-01 4:10 31-Jul-01 4:10  Does anyone know how to load an icon into the statusbar without using MFC ? I need this to a COM server in wich I'm not using MFC. thanx /John

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