C / C++ / MFC

FirstPrevNext

Re: Talking to Parallel Port Russell Morris16-Oct-01 5:43 Russell Morris 16-Oct-01 5:43  Friggin' perfect! I'm somewhat disappointed, though, as now I'll have to spend $200 on this LCD screen so I can start playing with it! Thanks. -- Russell Morris Georgia Institute of Technology "Hello, I'm doctor stupid. I'm going to take out your liver bones!" - Ralph Wiggum Re: Multiple selection CTreeCtrl 16-Oct-01 4:00 16-Oct-01 4:00  look at this http://www.techsoft.no/bendik/ or this http://www.codeguru.com/treeview/CMultiTree.shtml How can I trap Virtual Keys ? Braulio Dez16-Oct-01 3:19 Braulio Dez 16-Oct-01 3:19  Hi, I would like to have an OnKeyDown event like, for the virtual keys ( -> <- ALT CTRL), is there anyway to do that, or I have to go to the PretranslateMessage... ? Thanks, Bye! Braulio Need tools / techniques for tracing GDI leakage Jase Jennings16-Oct-01 2:14 Jase Jennings 16-Oct-01 2:14  Hi, I need to find a tool or learn some techniques that can help me trace GDI leakage. I've found some tools on MSDN which work for Windows Me and 2000, but i also need to check on NT4. Besides, the tools i found on MSDN weren't very good anyway. They reported massively spiralling leakages for palletes and regions and bitmaps when i'm not creating any! Surely to leak, i would have to create and forget to destroy. So those tools may justfifably have been telling me about leaks - but definately they were incorrectly identifying the resource. And they didn't help you find the code. Any ideas please ? Jase ------------------------------------------------------------------------------------------------------------------------------------------------------------------- View your digital photos and images with ease using the ultimate desktop image manager for Microsoft Windows Download your free copy of SlideShow Desktop today from http://www.slideshowdesktop.com Re: Need tools / techniques for tracing GDI leakage Braulio Dez16-Oct-01 3:18 Braulio Dez 16-Oct-01 3:18  Hi Jase ! There is a tool called GDIObj.exe ( Try to find this on the web), if you don´t have it tell me, and I send it to you. HTH Braulio Re: Need tools / techniques for tracing GDI leakage Jase Jennings16-Oct-01 3:51 Jase Jennings 16-Oct-01 3:51  Hi Braulio, Thanks for you reply. I searched using google.com and found a gdiobj.exe on ftp.microsoft. It turned out to be a self extracting zip file from 1995 containing source code which i couldn't build (it doesn't have a workspace, so i would have to work out the libraries and dependencies myself in order to link it). It also came with 2 exe's which were dependant upon mfc30.dll so i coldn' run them. I would really appreciate it if you could send me your copy. jpj@totalise.co.uk Thanks Jase ------------------------------------------------------------------------------------------------------------------------------------------------------------------- View your digital photos and images with ease using the ultimate desktop image manager for Microsoft Windows Download your free copy of SlideShow Desktop today from http://www.slideshowdesktop.com Re: Need tools / techniques for tracing GDI leakage Rob Caldecott16-Oct-01 3:20 Rob Caldecott 16-Oct-01 3:20  Bounds checker is probably the best tool for tracking GDI leaks, but it ain't cheap. For memory leaks I would recommend PurifyNT, but, again, it's expensive. In my experience of Windows programming (10 years now) the most common leaks are: * Deleting pens, brushes or fonts that are still selected in the DC. * Calling GetDC without a corresponding ReleaseDC. Regards. Re: Need tools / techniques for tracing GDI leakage Jase Jennings16-Oct-01 3:55 Jase Jennings 16-Oct-01 3:55  Thanks for your reply. I have tried Purify but when i have Purify running, my dialog will not display. As for bounds checker, i would love to take look, as I have heard much about it. However, they don't provide an evaluation copy which in my book is criminal. I'm not paying all that money without testing it first ... I shall double check my code for the instances you mention. Jase ------------------------------------------------------------------------------------------------------------------------------------------------------------------- View your digital photos and images with ease using the ultimate desktop image manager for Microsoft Windows Download your free copy of SlideShow Desktop today from http://www.slideshowdesktop.com Re: Need tools / techniques for tracing GDI leakage Rob Caldecott16-Oct-01 4:05 Rob Caldecott 16-Oct-01 4:05  I agree - not having an evaluation copy to play with is pants! Here are some classic leak examples: void CMyView::OnDraw(CDC* pDC) { CFont font; // Create a font font.CreatePointFont(120, _T("Arial"), pDC); // Select the font into the DC pDC->SelectObject(&font); // Draw pDC->TextOut(0, 0, _T("Leak!")); // The original font isn't selected back into the DC // and the font we created is about to be deleted. // This will soon deprive you of resources (Win9x especially) } void CMyView::DrawSomething() { // Get a DC CDC* pDC = GetDC(); // Draw pDC->TextOut(0, 0, _T("Leak!")); // You must call ReleaseDC, else this will leak! } Re: Need tools / techniques for tracing GDI leakage Jase Jennings16-Oct-01 4:27 Jase Jennings 16-Oct-01 4:27  Hi, I can see why these examples would cause leakage, and in looking through my source files - I'm not guilty of either of them (mores he pity, cos then at least i would have found some leaks ... Jase Jase ------------------------------------------------------------------------------------------------------------------------------------------------------------------- View your digital photos and images with ease using the ultimate desktop image manager for Microsoft Windows Download your free copy of SlideShow Desktop today from http://www.slideshowdesktop.com Re: Need tools / techniques for tracing GDI leakage Rob Caldecott16-Oct-01 4:39 Rob Caldecott 16-Oct-01 4:39  I am more than happy to look at your code if you like - I quite enjoy looking for leaks! Plus I have a pucker copy of BC I can run it through ... Re: Need tools / techniques for tracing GDI leakage Jase Jennings16-Oct-01 4:51 Jase Jennings 16-Oct-01 4:51  Thanks for your kind offer. However, my source is for a commercial product so i can't show you the code ... Jase ------------------------------------------------------------------------------------------------------------------------------------------------------------------- View your digital photos and images with ease using the ultimate desktop image manager for Microsoft Windows Download your free copy of SlideShow Desktop today from http://www.slideshowdesktop.com Re: Need tools / techniques for tracing GDI leakage Jase Jennings16-Oct-01 12:52 Jase Jennings 16-Oct-01 12:52  Out of interest - how did you get your hands on a copy. I've looked on their website and it doesn't even give a price. It sems you have to go through a salesman / vendor in order to get a copy. And did you then enter a registration code to it ? (that is, it was 'unlockable') ? Jase ------------------------------------------------------------------------------------------------------------------------------------------------------------------- View your digital photos and images with ease using the ultimate desktop image manager for Microsoft Windows Download your free copy of SlideShow Desktop today from http://www.slideshowdesktop.com Re: Need tools / techniques for tracing GDI leakage 16-Oct-01 5:49 16-Oct-01 5:49  Also, calling DeleteObject instead of DeleteDC. Re: Need tools / techniques for tracing GDI leakage 16-Oct-01 21:35 16-Oct-01 21:35  We used to use boundschecker, but it din't seem to work after I upgraded to VC 6.0. (i.e. it was reporting memory leaks that weren't there) Re: Need tools / techniques for tracing GDI leakage Christian Graus16-Oct-01 12:38 Christian Graus 16-Oct-01 12:38  MSDN mag ran an article in the last 12-18 months and not in the last 6, which was a program that showed you the bitmaps/pens/etc that had not been deleted. It rocked, if you cannot find it LMK and I'll dig it up. Also, W2000 makes you work pretty hard to leak GDI memory, because it cleans up after you. This I know from bitter experience. Christian As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet. Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery. Re: Need tools / techniques for tracing GDI leakage Jase Jennings16-Oct-01 12:49 Jase Jennings 16-Oct-01 12:49  I think the tool you mentioned is the tool i mentioned earlier. It is only 95/98 , and you're right - it shows the pensd , palletes and fonts that you are leaking. And it does indeed display lots of them! Only i don't use any, so its not my app thats leaking them From the outset, it looks pretty good. But in truth, it doesn't reflect the state of my application one iota. It's called GDIUsage - is this the one ? You have to build it from source - available from MSJ online. Jase ------------------------------------------------------------------------------------------------------------------------------------------------------------------- View your digital photos and images with ease using the ultimate desktop image manager for Microsoft Windows Download your free copy of SlideShow Desktop today from http://www.slideshowdesktop.com Re: Need tools / techniques for tracing GDI leakage Christian Graus16-Oct-01 12:56 Christian Graus 16-Oct-01 12:56  That sounds like it. I dunno about NT 4, but I can tell you that code that runs fine under W2000 will crash W98 for GDI leaks in seconds. It's possible NT4 protects itself in a similar way, but the reason the code only ran under 95/98 (and I guess ME ) is that the handles to the objects were all global. It shows you what exists on the system, not what has leaked, that is why it fills up. You look to see if the list is growing a lot by taking snapshots and seeing what is different between two points in time, and if there is a lot there you should have deleted. Christian As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet. Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery. Re: Need tools / techniques for tracing GDI leakage Jase Jennings16-Oct-01 21:55 Jase Jennings 16-Oct-01 21:55  Hi, Thanks for your reply. I have managed to trace the problem that i had (thanks to an evaluation copy of Bounds Checker) - it was all thanks to a couple of HKEY's which i had forgot to do a RegClose() on. Just a silly mistake really (but aren't they all?). Still, it begs the question - why did the gdi tool we are discussing show me lots of fonts , pallettes and regions when i took the comparison snapshots? I had no other program running at the time, so these resources weren't being created by any other application. Is it possible that it could mistake HKEY's (and whatever may be internally allocated when opening a registry key) for GDI resources , and then point me at some bogus resources ? Are registry keys treated similarly to file's / sockets ? i.e. there are a physical limit to the number of open files you can have - is the same true for reg keys ? Would this also make sense of all the 'A resource you requested was unavailable' msg boxes that popped up when my 'resources' were running low. Am i likely to get this error if it was in fact due to reg keys ? damn, there's so much to learn. Jase ------------------------------------------------------------------------------------------------------------------------------------------------------------------- View your digital photos and images with ease using the ultimate desktop image manager for Microsoft Windows Download your free copy of SlideShow Desktop today from http://www.slideshowdesktop.com Re: Need tools / techniques for tracing GDI leakage James Spibey1-Nov-01 0:21 James Spibey 1-Nov-01 0:21  How did you manage to get an evaluation of Boundschecker? James Spibey I love the word naked, it's brilliant isn't it, 'naked'. When I was a kid I used to write the word naked on a bit of paper hundreds of times and rub my face in it - Jeff, Coupling, BBC2 Transparent button disable other functions :( 16-Oct-01 2:09 16-Oct-01 2:09  I use the CWinXPButtonST class to set a cool look to my buttons. I have a background image on my dialog and and when I using CWinXPButtonST class, and the old gray color that the buttons has is ugly. When I called the DrawTransparent() function to make it transparent the highlight event disables! How ot make it transparent and still have the highlight event there?? MP-219 Re: Transparent button disable other functions :( RobJones16-Oct-01 9:35 RobJones 16-Oct-01 9:35  I haven't used CWinXPButtonST but I have used CButtonST and it sounds like maybe the button isn't flat (Highlight only works on flat buttons).. You may have to do something like m_bButton.SetFlat(TRUE);... Hope this helps, Rob Jones SOS: changing fonts of controls in dialog tfElep15-Oct-01 23:28 tfElep 15-Oct-01 23:28  Texts in titles of all windows are getting smaller and smaller when I have the fonts of controls in one window such as buttons and statics changed. I wonder how the operation on this window affulent all the windows on desktop ---- the whole OS, even after this window has exited. my code is below: // CDlg is derived from CDialog BOOL CDlg::OnInitDialog(){ CDialog::OnInitDialog(); // m_button is a child button in CDlg SetFont(&m_button, "Times New Roman", 12); // see below m_button.SetFocus(); return false } CDlg::SetFont(CWnd* pWnd, char* strFont, int nSize){ CFont font; LOGFONT logFont; memset(&logFont, 0, sizeof(logFont)); logFont.lfHeight=-nSize; logFont.CharSet=DEFAULT_CHARSET; strcpy((char*)logFont.lfFaceName, strFont); font.CreateFontIndirect(&logFont); pWnd->SetFont(&font); } Maybe I should have keep the "font" variable until the dialog is ended, but the problem above still exists when I allocate memory from heap (malloc()) for "font" and "logFont". Can you change the fonts of all windows on desktop? Tiny Flying Elephant I love flying... Re: SOS: changing fonts of controls in dialog Michael Martin16-Oct-01 1:33 Michael Martin 16-Oct-01 1:33  Make CFont a member variable of the dialog class. Fonts will then work. At least they did for me when I had this problem. Michael Martin Pegasystems Pty Ltd Australia martm@pegasystems.com +61 413-004-018 "Don't belong. Never join. Think for yourself. Peace" - Victor Stone Re: SOS: changing fonts of controls in dialog Tomasz Sowinski16-Oct-01 1:34 Tomasz Sowinski 16-Oct-01 1:34  Yes, the font variable lifetime should be longer. Just make it a data member of CYourDialog - no need for malloc or new. LOGFONT is needed only to call CreateFontIndirect. It can be a local variable. Have no idea why your app changes the systemwide settings - does this happen only if you call CWnd::SetFont? Tomasz Sowinski -- http://www.shooltz.com

Last Visit: 31-Dec-99 18:00     Last Update: 9-Jun-24 11:33 Refresh ᐊ Prev1...17881178821788317884178851788617887178881788917890 Next ᐅ

General    News    Suggestion    Question    Bug    Answer    Joke    Praise    Rant    Admin   

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.