C / C++ / MFC

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Keeping Menu Open cje10-Jun-04 11:29 cje 10-Jun-04 11:29  I am using TrackPopupMenu to display a dropdown menu from a toolbar button that has an arrow on the right side. Things are working as I expect. The menu is basically a list of items that my user checks on/off. Someone in the office has seen an application where you can click an item in a menu and the menu stays open so the user can "select" multiple menu items and then click off of the menu to close it...they now want this in my app. Any ideas on how to keep the menu from closing after someone makes a selection? thanks in advance cje Re: Keeping Menu Open bikram singh10-Jun-04 14:43 bikram singh 10-Jun-04 14:43  You could try setting a WH_GETMESSAGE hook using SetWindowsHookEx() and intercept WM_LBUTTONDOWN ? Bikram Singh Help-Data Transfer Design1863010-Jun-04 11:04 Design18630 10-Jun-04 11:04  Hi I need to figure out a way to communicate with an A/D converter and send and receive data bytes from the PC. Any suggestions and comments are appreciated. Thanks. JB Re: Help-Data Transfer bikram singh10-Jun-04 19:20 bikram singh 10-Jun-04 19:20  What is the interface in use? USB/ParPort/Serial...what? If serial/parport, take a good look at the CreatFile() function in MSDN. Bikram Singh Re: Help-Data Transfer Design1863011-Jun-04 4:46 Design18630 11-Jun-04 4:46  Dear Bikram thanks for your reply. I will refer to the CreateFile() function. I am using a parallel port interface and linking the A/D converter to the PC through a SCSI cable. thanks JB GUI and data extraction with C++ stacey_cool10-Jun-04 10:36 stacey_cool 10-Jun-04 10:36  I have bunch of files in *.cpp format ( written in VC++). Presently i read the data from a text file and run the program. I want to make a GUI ( using MFC or anything else) so that user can enter the data in the GUI and hence the program reads it from there.. Please give any suggestions and ways to do it.. Re: GUI and data extraction with C++ alex.barylski10-Jun-04 10:40 alex.barylski 10-Jun-04 10:40  ummm probably wanna go with MFC...create a dialog based app add text boxes or whatever and goto town... Cheers How do I print my voice mail? Displaying Text in an App ... Simple, right? mike-o10-Jun-04 10:20 mike-o 10-Jun-04 10:20  Hi, I'm a newbie working on an MFC app which needs to display a simple text file of results. I have searched google as well as codeproject, but am stumped as to how i can do this. I am guessing i'll want to derive a class from CRichEditView, and add the text from there, but how do I add text?! If anyone has any tips, or places i could look for an answer, it would be greatly appreciated. Thanks, Mike "I bet Einstein turned himself all sorts of colors before he invented the light bulb." -- Homer J. Re: Displaying Text in an App ... Simple, right? alex.barylski10-Jun-04 10:39 alex.barylski 10-Jun-04 10:39  How do you want to display your results...? What kind of results are they? It would probabbly be much easier to dump your result to a listbox than using a rich edit. How do I print my voice mail? Re: Displaying Text in an App ... Simple, right? mike-o10-Jun-04 11:03 mike-o 10-Jun-04 11:03  It's just a text file created by our backend that lists concentrations of different elements. I want to display them similar to notepad, where the user can scroll up and down, to review, and print if desired. listbox, eh? I'll look into that. thanks. mike "I bet Einstein turned himself all sorts of colors before he invented the light bulb." -- Homer J. Re: Displaying Text in an App ... Simple, right? David Crow10-Jun-04 10:59 David Crow 10-Jun-04 10:59  mike-o wrote: I am guessing i'll want to derive a class from CRichEditView, and add the text from there, but how do I add text?! Assuming the text is in a variable (e.g., CString), you can simply call the rich edit control's SetWindowText() method. "When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen Re: Displaying Text in an App ... Simple, right? mike-o10-Jun-04 11:07 mike-o 10-Jun-04 11:07  Ah, that sounds like a good plan. thanks! mike "I bet Einstein turned himself all sorts of colors before he invented the light bulb." -- Homer J. Re: Displaying Text in an App ... Simple, right? Johan Rosengren10-Jun-04 21:21 Johan Rosengren 10-Jun-04 21:21  And you have not found my article http://www.codeproject.com/file/textfile.asp[^]? Shocking! The class contains a member Load that directly loads the contents of a file to an edit control (or a listbox). And here ones takes time to carefully craft and upload code... OOP problem with MFC Anonymous10-Jun-04 8:13 Anonymous 10-Jun-04 8:13  Hello dear programmers, You can see me as a beginner, actually I know only what I need to know to make an application in Visual C++. I'm having an OOP problem using MFC now. I give you a peace of code here so you know what I mean. But first my question: My purpose is to make pointer to a class. For example, in my clientsocket Clisocket I want in my constructorparameter a pointer to the class CSockCliDoc. In a sample code wich it works fine, it is like this: #include <wcesock.h> class CSockCliDoc; class CCliSocket : public CCeSocket { // Attributes public: // Operations public: CCliSocket(CSockCliDoc *pInDoc); virtual ~CCliSocket(); // Implementation protected: private: CSockCliDoc *pDoc; }; What I don't understand is the second line: class CSockCliDoc; What is the purpose of this part of code . I know that if you want to create a new class, you begin with "class whatever" and than "{the rest of the code for wathever it is};" Can anybody help me to understand why the second line is needed? Thank you very much, I'm sorry for my bad English, I'm from Holland. Re: OOP problem with MFC Johan Rosengren10-Jun-04 8:32 Johan Rosengren 10-Jun-04 8:32  Anonymous wrote: class CSockCliDoc; class CCliSocket : public CCeSocket { CSockCliDoc is an ahead declaration. It means "I'm going to use a pointer to CSockCliDoc in the class declaration below, but I've not declared the class itself here. It is defined elsewhere." Anonymous wrote: Thank you very much, I'm sorry for my bad English, I'm from Holland. That's not an excuse, you're supposed to speak good English there Re: OOP problem with MFC Anonymous10-Jun-04 8:53 Anonymous 10-Jun-04 8:53  Thanks Johan , But that "ahead declaration" is that a standard C++ technique, or do they use it only in MFC? Can you give me some links where I can get more information about ahead declaration? I'll do my best to speak english well Re: OOP problem with MFC palbano10-Jun-04 9:15 palbano 10-Jun-04 9:15  Standard C++ http://c2.com/cgi/wiki?ForwardDeclaration[^] "No matter where you go, there your are." - Buckaroo Banzai -pete Re: OOP problem with MFC David Crow10-Jun-04 9:17 David Crow 10-Jun-04 9:17  Forward declaration is standard, at least in all of the C++ compilers I've used. It has nothing to do with MFC. "When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen Re: OOP problem with MFC palbano10-Jun-04 9:23 palbano 10-Jun-04 9:23  You need to click faster "No matter where you go, there your are." - Buckaroo Banzai -pete Re: OOP problem with MFC Anonymous10-Jun-04 10:50 Anonymous 10-Jun-04 10:50  Wow guys, You are wonderful, you are really great helpers!! Thank you very very much and may God bless you! Peace!! How to draw a graphical object independently? Arun AC10-Jun-04 8:09 Arun AC 10-Jun-04 8:09  Hai all, I am doing a project involving graphical drawings. In my project, I add every drawn elements in a pointer list. And, while drawing a new element ie on every mouse move, i redraw all the elements in the pointer list and draw the current elements with the new coordinates. This slows down my application. I tried Double buffering and XOR techniques but in vain. Is there any other way to draw an element without disturbing other drawn elements? Please help me. With Thanks, Arun Chakaravarthy Re: How to draw a graphical object independently? Johan Rosengren10-Jun-04 8:40 Johan Rosengren 10-Jun-04 8:40  While dragging, you might want to try to invalidate only the original and new positions of the object(s) moved in the window - this way you redraw just a part of the screen. You could also try to analyze what the bottleneck might be. I'm redrawing all of the screen in my vector editor http://www.codeproject.com/miscctrl/diagrameditor.asp[^] Hm, it starts to sound like I'm shamelessly plugging for that beast... Anyway, feel free to take a look at it and its' sibling http://www.codeproject.com/miscctrl/flowcharteditor.asp[^] - both redraw all objects as soon as one is moved, and neither of them displays any dramatic performance problems. They double buffer, btw. If you are shuffling bitmaps, you might have another situation, but make sure that the access to the objects is as simple as possible, and that it is the drawing itself that is the problem, before you start optimizing the drawing rect. struct _timeb Question Nick Parker10-Jun-04 7:25 Nick Parker 10-Jun-04 7:25  Is there a function to find the differences between two time structs of type _timeb? If not, is there any easy way to show atleast the hundreth's of seconds between to time_t values? Whenever I do something below I always get 0's, it can't always be that exact: double diff; diff = difftime(end, start); char msg[] = "blah blah blah runtime %.10f second(s)."; - Nick Parker My Blog | My Articles Re: struct _timeb Question Michael Dunn10-Jun-04 8:15 Michael Dunn 10-Jun-04 8:15  time_t only has 1-second resolution, so you'll never get a different less than 1 second (unless it's 0). Your best bet would probably be to use FILETIME, which is a 64-bit number with 100ns resolution. It's a plain number so calculating differences is easy. (I think the CRT time structs are incredibly clunky and I avoid them as much as possible.) --Mike-- Personal stuff:: Ericahist | Homepage Shareware stuff:: 1ClickPicGrabber | RightClick-Encrypt CP stuff:: CP SearchBar v2.0.2 | C++ Forum FAQ ---- Laugh it up, fuzzball. Re: struct _timeb Question Nick Parker10-Jun-04 8:30 Nick Parker 10-Jun-04 8:30  Thanks Mike, are there other functions other than GetFileTime that you would suggest, I am not working with files so I won't have a HANDLE for it? Nevermind, I think SystemTimeToFileTime should work. Thanks again for pointing me in the right direction. - Nick Parker My Blog | My Articles

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