C / C++ / MFC

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Re: I need to detect a float ns31-Oct-02 1:18 ns 31-Oct-02 1:18  Was considering that but I had quantities like 123.456:78 as well. So I thought that it would have to have "." but no ":" to be a float. Christians given me a good snippet and I'm going to doctor it up to handle my weird "numbers"... Appreciate your help, ns Re: I need to detect a float Christian Graus30-Oct-02 11:15 Christian Graus 30-Oct-02 11:15  As is often said, if you expressed what you want in plain english, it would be obvious to you. bool IsFloat( LPCTSTR pszText ) { ASSERT_VALID_STRING( pszText ); const int nLen = lstrlen( pszText ); int nDots = 0; for( int i = 0; i < nLen ); i++ ) { if (pszText[i] == '.') ++ nDots; else if( !_istdigit( pszText[ i ] )) return false; } return (nDots < 2); } That will return true for int and float, make it return (nDots == 1) to be true for float only. Note, I did this in CP, it is untested, but the idea is sound. Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002 Thank you! ns31-Oct-02 1:15 ns 31-Oct-02 1:15  I really wouldnt have stumbled on it in a million years..... . Many thanks! Appreciate your help, ns Re: I need to detect a float ns31-Oct-02 1:54 ns 31-Oct-02 1:54  Gosh! Works like magic! Did what I was trying to like a charm! Really made me think, and appreciate the cool technique... Thanks! ns deadlock woes mystro_AKA_kokie30-Oct-02 11:06 mystro_AKA_kokie 30-Oct-02 11:06  CMyView::OnChar(...) { PostThreadMessage(id,msg,0,0); } when i type with less than 130ms time intervals between keystrokes a deadlock results in the app's main thread.Any help would be greatly appreciated. Re: deadlock woes User 988530-Oct-02 12:53 User 9885 30-Oct-02 12:53  Are you accessing MFC window classes from the thread's message loop? MFC Window classes + threading = recipe for disaster. You are better off doing all your window message handling in the main app thread and delegating any time-consuming work to worker threads to make the application respond better. I have had my share of problems trying to update MFC frame windows and views from threads. I later used userdefined messages to the window for all my events from the thread, so that all GUI functions like updating views etc were done in the main thread. modified 29-Aug-18 21:01pm. Help with ListView Control Steven M Hunt30-Oct-02 11:06 Steven M Hunt 30-Oct-02 11:06  Sorry to bother you guys with beginner questions, but I need help with the ListView control. I am creating an about dialog box and want to list all of the files installed (like Outlook Express). I have had a little success with it, but I am having trouble getting items to appear in the second or third column. The items only show up on the first column. How do I tell the program to place the text in specific columns (I am using MFC)? -- Steve Re: Help with ListView Control alex.barylski30-Oct-02 11:11 alex.barylski 30-Oct-02 11:11  On CP there is a CSortListCtrl which simplifies this task ten fold and it allows you to click on the header columns to sort ascending or descending... Check it out... I'm not totally familiar with CListCtrl, but I reckon you probably get items in the second, thrid columns by specifiying that the main items has child sub-items.... Cheers! "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr Re: Help with ListView Control Anonymous30-Oct-02 11:36 Anonymous 30-Oct-02 11:36  LVITEM lvi; //fist item lvi.mask = LVIF_TEXT; lvi.iItem = 0; // First column lvi.iSubItem = 0; // Frist item lvi.pszText = (LPTSTR)(LPCSTR)("Item 1"); // Now insert the item m_myList.InsertItem(&lvi); // Now set the text for the 2nd, 3rd ,4th items they will go in row 0 "which is the first row" m_myList.SetItemText(0,1,"Item 2"); m_myList.SetItemText(0,2,"Item 3"); m_myList.SetItemText(0,3,"Item 4"); Re: Help with ListView Control Steven M Hunt30-Oct-02 13:52 Steven M Hunt 30-Oct-02 13:52  Thanks a lot. That solved my problem. I just converted from Win32 programming, and ListView is a little different. For instance, the variable LVITEM is LV_ITEM in Win32. Thanks for helping me solve my problem. -- Steve real time audio encoding/decoding over a network ascherchen30-Oct-02 10:58 ascherchen 30-Oct-02 10:58  can anyway recommend any mp3 encoders/decoders C/C++ libraries (must be minimum 128KBps quality) in order to stream LIVE audio over a network? I'm trying to create an application which will be like a video conferencing app but audio only.it will allow a minimum of 3 musicians to hear the other musicians playing live and also record the session. cheers Re: real time audio encoding/decoding over a network Stephane Rodriguez.30-Oct-02 11:13 Stephane Rodriguez. 30-Oct-02 11:13  MS DirectShow (part of DirectX) could provide both the application logic, and the necessary codec stuff. For instance, you have an input filter with an associated moniker to receive a stream from the network. More info in the SDK. How low can you go ? (MS rant) atoi(123.567) ns30-Oct-02 10:54 ns 30-Oct-02 10:54  I cant check it out right now, but what will atoi(123.567) return? I'm hoping its 123...? Appreciate your help, ns Re: atoi(123.567) Christian Graus30-Oct-02 10:58 Christian Graus 30-Oct-02 10:58  I'd imagine you want to do this: floor(atof("123.567")); Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002 Re: atoi(123.567) alex.barylski30-Oct-02 11:00 alex.barylski 30-Oct-02 11:00  I think atoi is short for atom to interger...so you'll probably get a compiler error... atoi("123.567"); would probably work better... it's 123... Cheers! "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr Re: atoi(123.567) ian mariano30-Oct-02 21:41 ian mariano 30-Oct-02 21:41  ascii to integer, I think is the proper long name for it "The greatest danger to humanity is humanity without an open mind." - Ian Mariano http://www.ian-space.com/ Re: atoi(123.567) alex.barylski30-Oct-02 22:35 alex.barylski 30-Oct-02 22:35  Thats works for me... I tought myself that little abbreviation when I first started programming in windows and now I always associate a with atom...but ascii fits MUCH better... Thank you... "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr Re: atoi(123.567) S van Leent30-Oct-02 11:10 S van Leent 30-Oct-02 11:10  Aren't you want to do _itoa(123.567) or something like that? LPCTSTR Dutch = TEXT("Double Dutch "); XML using DOM Anonymous30-Oct-02 10:45 Anonymous 30-Oct-02 10:45  I am using XML DOM in VC++ to parse an XML document .A person could load a malicious File which isnt Well Formatted (preccursor for XML). How do I safeguard against this ? As for eg someone could unknowingly load a file with Element tag attributes seperated by commas , which isnt allowed . How do I safeguard against this ? I am looking for something that will do the task isWellFormed() !!!! Please help . Re: XML using DOM Christian Graus30-Oct-02 10:59 Christian Graus 30-Oct-02 10:59  load the XML into the DOM in a try/catch block. Christian No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002 Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002 During last 10 years, with invention of VB and similar programming environments, every ill-educated moron became able to develop software. - Alex E. - 12-Sept-2002 Text & Background color in Listbox? Anonymous30-Oct-02 10:39 Anonymous 30-Oct-02 10:39  Hi, I'm creating a simple Win32 App (No MFC). ProgramList = CreateWindow("LISTBOX", "BLAH", WS_VISIBLE|WS_CHILD | LBS_STANDARD | LBS_NOTIFY ,10, 10, 250, 400, hwnd, (HMENU)10, GetModuleHandle(NULL), NULL); SendMessage(ProgramList,LB_ADDSTRING,0,(LPARAM)(LPTSTR)"test 1"); SendMessage(ProgramList,LB_ADDSTRING,0,(LPARAM)(LPTSTR)"test 2"); SendMessage(ProgramList,LB_ADDSTRING,0,(LPARAM)(LPTSTR)"test 2"); This creates my Listbox and three strings. Now, how do I change the text and background color in the listbox? I tried this: SetTextColor(GetDC(ProgramList), RGB(132, 123, 213));, But nothing happens. I tried adding LBS_OWNERDRAWFIXED to the CreateWindow function of the listbox. But then the listbox just turns white, no text nothing. What am I doing wrong? Thanks for any help. Re: Text & Background color in Listbox? alex.barylski30-Oct-02 11:04 alex.barylski 30-Oct-02 11:04  Read up on the WM_CTLCOLORLISTBOX message...it should let you do all you need... Cheers! "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr Re: Text & Background color in Listbox? Anonymous30-Oct-02 11:32 Anonymous 30-Oct-02 11:32  I checked it on MSDN, but didnt find anything usefull, do you know the exact page you where talking about? Re: Text & Background color in Listbox? alex.barylski30-Oct-02 14:25 alex.barylski 30-Oct-02 14:25  The message description...it explains exactly what it's for... Check MSDN again but look under MFC instead it explains exactly how it works CWnd::OnCtlColor() "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr Re: Text & Background color in Listbox? Anonymous31-Oct-02 8:09 Anonymous 31-Oct-02 8:09  Thanks, but I can't use MFC.

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