C / C++ / MFC

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events problem.... Neha3-Apr-02 2:53 Neha 3-Apr-02 2:53  Hi, I will set one event,if i call a messagebox after that everything works fine.Otherwise it hangs in waitforsingleobject(). I don't want to show any message box.so i did get/PostMessage+DispatchMessage. It doesn't work.. Can anyone pl help me... Neha remove item from std::list 3-Apr-02 2:46 3-Apr-02 2:46  when i try to remove an item from a list inside of the loop it crashes. here is my code: list <sometype>::iterator i; for (i=mylist.begin(); i!=mylist.end(); i++) { if (...) { mylist.erase(i); } } Re: remove item from std::list Chris Losinger3-Apr-02 3:11 Chris Losinger 3-Apr-02 3:11  if you want to be STL-friendly, use list::remove_if (see MSDN for a sample) (the rest of the incorrect crap i posted earlier has been removed, to protect my good name) -c "Do you mind if I smoke?" "Madam, I don't care if you burn."    -Oscar Wilde Smaller Animals Software, Inc. Re: remove item from std::list Christian Graus3-Apr-02 9:47 Christian Graus 3-Apr-02 9:47  Chris Losinger wrote: erase invalidates all iterators. For std::list - are you *sure* ? My first reaction is that this is true of vector, but not list. Remove_if is obviously a better way to go though Christian The tragedy of cyberspace - that so much can travel so far, and yet mean so little. "I'm somewhat suspicious of STL though. My (test,experimental) program worked first time. Whats that all about??!?! - Jon Hulatt, 22/3/2002 Re: remove item from std::list Chris Losinger3-Apr-02 9:56 Chris Losinger 3-Apr-02 9:56  now that you've forced me to look it up... i'm sure i was wrong. but, that was the explanation for the crash that sounded best. if that wasn't it, maybe there was something wrong with calling the destructor for the object in the list. yuk. -c "Do you mind if I smoke?" "Madam, I don't care if you burn."    -Oscar Wilde Smaller Animals Software, Inc. Re: remove item from std::list 3-Apr-02 3:47 3-Apr-02 3:47  Your iterator gets invalid. Do: list <sometype>::iterator i; for (i=mylist.begin(); i!=mylist.end(); i++) { if (...) { i = mylist.erase(i); } } and your iterator will be right on track. Re: remove item from std::list Jack Handy3-Apr-02 4:46 Jack Handy 3-Apr-02 4:46  I beleive this is correct however you should also do i--; after the erase() call because erase() returns the next iterator and it will get ++'d at the top of the loop therefore skipping the item after the one you erased. Hope this makes sense. -Jack To an optimist the glass is half full. To a pessimist the glass is half empty. To a programmer the glass is twice as big as it needs to be. Printing with MS Word Automation 3-Apr-02 1:59 3-Apr-02 1:59  I've made a MS Word automation project in order to print it's content into Acrobat Distiller. I want to print 3 pages (nPages = 3). //--------------------------------------------------------------------------------------------------------------------------------------- So, my method is : void _Document::PrintOut(VARIANT* Background, VARIANT* Append, VARIANT* Range, VARIANT* OutputFileName, VARIANT* From, VARIANT* To, VARIANT* Item, VARIANT* Copies, VARIANT* Pages, VARIANT* PageType, VARIANT* PrintToFile, VARIANT* Collate, VARIANT* ActivePrinterMacGX, VARIANT* ManualDuplexPrint, VARIANT* PrintZoomColumn, VARIANT* PrintZoomRow, VARIANT* PrintZoomPaperWidth, VARIANT* PrintZoomPaperHeight ) { static BYTE parms[] = VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT VTS_PVARIANT; InvokeHelper(0x1bc, DISPATCH_METHOD, VT_EMPTY, NULL, parms, Background, Append, Range, OutputFileName, From, To, Item, Copies, Pages, PageType, PrintToFile, Collate, ActivePrinterMacGX, ManualDuplexPrint, PrintZoomColumn, PrintZoomRow, PrintZoomPaperWidth, PrintZoomPaperHeight); } //----------------------------------------------------------------------------------------------------------------------------------------------- And, the following call to this method produces an exception, cause of COleVariant(nPages,VT_I4) CString text; m_Edit.GetWindowText(text); _Application objWord; // Convenient values declared as ColeVariants. COleVariant covTrue((short)TRUE), covFalse((short)FALSE), covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR); // Get the IDispatch pointer and attach it to the objWord object. if (!objWord.CreateDispatch("Word.Application")) { AfxMessageBox("Couldn't get Word object."); return; } objWord.SetVisible(TRUE); //This shows the application. Documents docs(objWord.GetDocuments()); _Document testDoc; testDoc.AttachDispatch(docs.Open ( COleVariant(text,VT_BSTR), covFalse, // Confirm Conversion. covFalse, // ReadOnly. covFalse, // AddToRecentFiles. covOptional, // PasswordDocument. covOptional, // PasswordTemplate. covFalse, // Revert. covOptional, // WritePasswordDocument. covOptional, // WritePasswordTemplate. covOptional, covOptional, covOptional), // Format. // Last argument for Word 97 (long)1 // Encoding // New for Word 2000/2002 ); // Close AttachDispatch(.) objWord.SetActivePrinter("Acrobat Distiller"); long nPages = 3; SCODE sc; TRY { testDoc.PrintOut(covFalse, // Background. covOptional, // Append. covOptional, // Range. covOptional, // OutputFileName. covOptional, // From. covOptional, // To. covOptional, // Item. covOptional, // Copies. COleVariant(nPages,VT_I4), // Pages. covOptional, // PageType. covOptional, // PrintToFile. covOptional, // Collate. covOptional, // ActivePrinterMacGX. covOptional, // ManualDuplexPrint. covOptional, // PrintZoomColumn New with Word 2002 covOptional, // PrintZoomRow ditto covOptional, // PrintZoomPaperWidth ditto covOptional); // PrintZoomPaperHeight ditto objWord.Quit(covFalse, // SaveChanges. covTrue, // OriginalFormat. covFalse // RouteDocument. ); sc = S_OK; } CATCH_ALL(e) { sc = COleException::Process(e); CString exp; exp.Format("%d", e); MessageBox(exp, "Exception !"); } END_CATCH_ALL How can i do ? Thanks. String -> char * Chris Coote3-Apr-02 1:57 Chris Coote 3-Apr-02 1:57  How would you get from a managed string to an unmannaged char array? I know there must be a more elegant way to get from point A to point B than: sName - String mcName - Char __gc[] cName - char* (allocated for 256;Assert sName.Length <= 255) mcName = sName->ToCharArray(); for(int j=0;j<mcname->Count;j++) cName[j]=Convert::ToSByte(mcName[j]); cName[mcName->Count]='\0'; App wants to know: Is cursor off me now? Rickard Andersson203-Apr-02 1:36 Rickard Andersson20 3-Apr-02 1:36  I want to catch when the mouse is leaving a button. When the mouse is or, I want to show a text in a static when the mouse is ovedr the button. And then the mouse is leaving the static will show another text. HOOOW!!! ------------------------------------ Rickard Andersson, Suza Computing ICQ#: 50302279 I'm from the winter country SWEDEN! ------------------------------------ Re: App wants to know: Is cursor off me now? Mazdak3-Apr-02 1:47 Mazdak 3-Apr-02 1:47  Subclass frmom CButton and overriden <coe>WM_MOUSEMOVE. Mazy "The path you tread is narrow and the drop is shear and very high, The ravens all are watching from a vantage point near by, Apprehension creeping like a choo-train uo your spine, Will the tightrope reach the end;will the final cuplet rhyme?"Cymbaline-Pink Floyd Re: App wants to know: Is cursor off me now? Rickard Andersson203-Apr-02 1:50 Rickard Andersson20 3-Apr-02 1:50  Yes, and how to know if the mouse is leaving the button!?? Thats the problemo dude! ------------------------------------ Rickard Andersson, Suza Computing ICQ#: 50302279 I'm from the winter country SWEDEN! ------------------------------------ Re: App wants to know: Is cursor off me now? Mazdak3-Apr-02 1:55 Mazdak 3-Apr-02 1:55  I'm not sure but test this one: WM_CAPTURECHANGED Mazy "The path you tread is narrow and the drop is shear and very high, The ravens all are watching from a vantage point near by, Apprehension creeping like a choo-train uo your spine, Will the tightrope reach the end;will the final cuplet rhyme?"Cymbaline-Pink Floyd Re: App wants to know: Is cursor off me now? alex.barylski3-Apr-02 3:13 alex.barylski 3-Apr-02 3:13  Chris has a cool CButton derived class demonstarting subclassing...perfect example of tracking mouse entrance and departure. Custom Button Cheers! "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr Re: App wants to know: Is cursor off me now? Jack Handy3-Apr-02 5:25 Jack Handy 3-Apr-02 5:25  Rickard Andersson wrote: Yes, and how to know if the mouse is leaving the button!?? Use SetCapture() to keep receiving the messages even when the mouse moves off of the control... don't forget to call ReleaseCapture() once you are done with it. -Jack To an optimist the glass is half full. To a pessimist the glass is half empty. To a programmer the glass is twice as big as it needs to be. OpenGL in MDI Apps under Windows 2000 v_krishnan3-Apr-02 0:56 v_krishnan 3-Apr-02 0:56  Hi, I have Windows 2000 Professional SP2 installed and I have built an OpenGL base MFC MDI application which works fine under WINNT 4.0. The problem I have with Windows 2000 is that, when I create more than one window, I get a black border on the window edges, which increases with every new window. This problem does not appear with nVidia GEForce MX 200. I suppose this is so because, nVidia provides its own ICD, wherease others use the generic implementation. Is there any way out of this problem?? Thanks in advance, Refreshing View From Tree Selection 3-Apr-02 0:42 3-Apr-02 0:42  Could anyone please, please help me. I've got a doc/view app with a modeless dialog(subclassed), in the dialog I have a tree, when I select an item, I'd like to refresh the main view. Simple enough I would have thought, but I can't get it to work. Should I be using messages or is there a simpler approach, is this enough information? I'm still learning MFC, any help would be much appreciated, thanks. UndeadHamster Bye Re: Refreshing View From Tree Selection 3-Apr-02 2:15 3-Apr-02 2:15  To keep the doucument/View design pattern intact, always keep relevant data in your doc object, and then redraw your view through the existing mechanisms for this purpose. In your case it could be something like: call the SelectTreeObject from your dialog: public: CMyDocument::SelectTreeObject(CMyTreeData* pData) { m_pSelectedObject = pData; UpdateAllViews(NULL, ID_SELECTION_CHANGED, pData); } CMyView::OnUpdate(CView *pView, UINT lHint, CObject *pHint) { if (lHint == ID_SELECTION_CHANGED) { // Do your stuff here, e.g. call Invalidate() } } In your OnDraw() handler you could ask your doc object for the selected tree object. Don't forget to #define your ID_SELECTION_CHANGED to some value. Re: Refreshing View From Tree Selection undeadhamster3-Apr-02 2:38 undeadhamster 3-Apr-02 2:38  Thanks a lot, your time is much appreciated UndeadHamster Bye DBGrid Drawil3-Apr-02 0:13 Drawil 3-Apr-02 0:13  can i user dbGrid with CRecordset? Best Regards Exact Caret Position in the Rich Edit Control internal2-Apr-02 23:51 internal 2-Apr-02 23:51  Now I want to create a vs auto-completion style list to help user typing in the Edit control. First I just want to it popup at caret postion but just can't control it's exact position with GetTextMetrics. Next How can I send key press between edit and popup list? Thanks. Sing when we're programming. Re: Exact Caret Position in the Rich Edit Control alex.barylski3-Apr-02 0:17 alex.barylski 3-Apr-02 0:17  GetCaretPos() ClientToScreen() use these coordinates for positioning your popup window. "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr 3D graphics question alex.barylski2-Apr-02 23:49 alex.barylski 2-Apr-02 23:49  Christian or Kilowatt...you both seem to be quite aquainted with GDI and graphics so feel free to answer me...please...? I'm interested in designing a small 3d type app which will not require texture mapping, The whole scene will be generated by the given poly coords and lighting opcodes etc...(I dunno if i'm 100% with terms, but excuse me if i ain't). I'm also gaining interest in ATL and am considering approaching this with ATL (so it can be used in webpages AND applications). Given the above how would you suggest I handle this...? There are hundreds of online 3d lib's I have about 5 books that show me in detail how things work Gourand(speling) shading Phong(spelling) etc... There there DirectX, OpenGL and how many other API's which are included on most OS's...I would figure anyway. I've heard great things about DirectX...my fav game uses it and uses it well, but it's really to many bells and whistle. However this wouldn't matter I understand, cuz DirectX is already on most PC's and would probably provide best results because DirectX API (i imagine) uses MMX or 3DNow technology...depending on the PC architecture. Knowing I won't need anything other than fancy shading, gradients, alpha factoring and anti-alising would it (maybe not make sense) but do any harm to open my books and copy paste...? Or would you really suggest using DirectX API..? I'd really like it to be fast, but doesn't require super speed...the scenes are small only about 64x64 pixels (my 286 could render that in the blink of an eye). And I would really like cross platform compatibility... Is ATL supported in .NET...? Is it any easier...? Thanx in advance. Cheers! "An expert is someone who has made all the mistakes in his or her field" - Niels Bohr Re: 3D graphics question Paul M Watt3-Apr-02 5:54 Paul M Watt 3-Apr-02 5:54  There is so much to learn about 3D graphics, I will try to help you as much as I can. HockeyDude wrote: I'd really like it to be fast, but doesn't require super speed...the scenes are small only about 64x64 pixels (my 286 could render that in the blink of an eye). And I would really like cross platform compatibility... Do you mean UNIX, MAC and PC, or Windows95 - WindowsXP? DirectX / Direct 3D is a good tool for the PC, but OpenGL is platform independant. HockeyDude wrote: I'm also gaining interest in ATL and am considering approaching this with ATL (so it can be used in webpages AND applications). If you place it in a webpage, it will eihter need to be an ActiveX control, or a JAVA Applet. The activeX contol will lock you down to Win32, and the JAVA Applet will slow you down. HockeyDude wrote: Knowing I won't need anything other than fancy shading, gradients, alpha factoring and anti-alising would it (maybe not make sense) but do any harm to open my books and copy paste...? This would not hurt, but then you do not gain the advantage of your 3D card doing the work for you. Recently I wrote a 3d viewer from scratch (for fun), that handles Flat, Gouraud and Phong shading. Gouraud and Phong really start to bog down my machine because of all of the CPU power that it uses. When possible, you should use a library that takes advantage of your card like OpenGL or DirectX. HockeyDude wrote: Is ATL supported in .NET...? Is it any easier...? The only reason to use directX for this task is to place your renderer in an ActiveX control. For the most part you should be able to create your renderer without ATL. That way you can focus on one task at a time. Then when you want your viewer in a control, it should not be too much work to replace the painting portion of your control with the viewer. HockeyDude wrote: uses MMX or 3DNow technology...depending on the PC architecture. Just for your information, these tools are not too much to get excited about, MMX is basically an extension to allow you to do native 3D operations with integers. Most 3D applications use floats for accuracy. The libraries use their own hardware on the video card to accomplish these tasks, and most tools ignore MMX. I think I have answered most of your questions. If you have any others feel free to ask. k. Network Card packet Programm! Reza Azizi2-Apr-02 23:28 Reza Azizi 2-Apr-02 23:28  I want to write a program that can access to the network packets and … How can I find information and source code about this? Thanks

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