C / C++ / MFC

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Re: Which is faster TransparentBlt or AlphaBlend Chambers9-Nov-01 2:39 Chambers 9-Nov-01 2:39  Right, got you. I`ve got something to work with now Tomasz, thanks for that. I`ll let you know how I get on. Thanks again for the quick response, Alan. P.S. One more thing, I presume that once you`ve calculated the mask its stored as a HBITMAP variable, ready to be used over and over again? "When I left you I was but the learner, now I am the Master" - Darth Vader Re: Which is faster TransparentBlt or AlphaBlend Tomasz Sowinski9-Nov-01 2:43 Tomasz Sowinski 9-Nov-01 2:43  I presume that once you`ve calculated the mask its stored as a HBITMAP variable, ready to be used over and over again? Exaclty. I'm keeping it selected in its own memory DC to reduce overhead. Tomasz Sowinski -- http://www.shooltz.com Re: Which is faster TransparentBlt or AlphaBlend Chambers9-Nov-01 4:45 Chambers 9-Nov-01 4:45  Cheers Tomasz, everything is now cool. Alan. "When I left you I was but the learner, now I am the Master" - Darth Vader Re: Which is faster TransparentBlt or AlphaBlend Christian Graus9-Nov-01 9:59 Christian Graus 9-Nov-01 9:59  As far as the functions I wrote are concerned, Alphablend is probably faster because it doesn't generate a mask on the fly, it accesses the bits directly. As Thomasz has said, if you're doing it over & over you're better off splitting the code so you only generate the mask once, that's probably faster again. The way to make my alpha blend function faster is to make sure the bitmap is a DIBSection to start with, then you can use GetObject to get the pointer to the underlying bits. Christian After all, there's nothing wrong with an elite as long as I'm allowed to be part of it!! - Mike Burston Oct 23, 2001 Re: Which is faster TransparentBlt or AlphaBlend Chambers13-Nov-01 1:32 Chambers 13-Nov-01 1:32  Thanks for the response Christian, I`ve decided to go and do it the Alpha Blend way, for the reasons you said. I already had a DIBSection, and the method became alot faster again. I also didn`t have to worry about masks and stuff either, which was the main problem I encountered with TransparentBlt (as Tomasz rightly pointed out). Cheers for all the help guys, very much appreciated. "When I left you I was but the learner, now I am the Master" - Darth Vader about Registry Maer7279-Nov-01 1:28 Maer727 9-Nov-01 1:28  - Are there any stuff about how to use VC++ to manipulate registry? - Can you help? - Regards, Maer Re: about Registry Michael P Butler9-Nov-01 1:31 Michael P Butler 9-Nov-01 1:31  There are some useful classes on CodeProject. Check out http://www.codeproject.com/system/. Michael Re: about Registry Maer7279-Nov-01 1:44 Maer727 9-Nov-01 1:44  - Thanks, Michael pal! - I have taken a look at the URL you mentioned. It is a nice stuff. - But I am a newbie of the field. I just want to know the basic use of the registry. I think there are too many articles for me to read. ) - Which article(s) is the most suitable to me? Do you have any suggestions? - Regards, Maer Re: about Registry Michael P Butler9-Nov-01 1:50 Michael P Butler 9-Nov-01 1:50  This class is useful if you want to read and write registry keys. http://www.codeproject.com/system/registry_class.asp Reading up on the Registry on MSDN is also useful. Ask any specific questions you need answers to and we'll help out. Michael Re: about Registry Maer7279-Nov-01 18:28 Maer727 9-Nov-01 18:28  - Thanks, Michael pal! - The URL is a good stuff. It helps a lot. - Have a nice weekend, Maer Re: about Registry Nish Nishant9-Nov-01 4:25 Nish Nishant 9-Nov-01 4:25  take a look at the following functions :- RegOpenKeyEx RegQueryInfoKey RegQueryValueEx RegEnumKeyEx RegCreateKeyEx RegDeleteKey RegCloseKey You better understand these calls before you start using those wrapper classes from CP because if you need to customize those classes, you'll need to know how they work Nish Sonork ID 100.9786 voidmain www.busterboy.org Nish is a BIG fan of Goran Ivanisevic Re: about Registry Maer7279-Nov-01 18:25 Maer727 9-Nov-01 18:25  － Thanks, Nish pal! - Your reply clarifies all my doubts. Hi, Nish, I think you know all the fields of VC++, arent't you? I think you are a born VC++ programmer. - Have a nice weekend, Maer CListCtrl window disappears?! Tommy H D Svensson8-Nov-01 22:57 Tommy H D Svensson 8-Nov-01 22:57  Hi, Has anyone had this problem before: If I click in the CListCtrl in report view and ALT+TAB toggles to another program (which completly hides the control) and then toggles back to the app with the CListCtrl, the control disappears. However it works if I don't click the CListCtrl and performs the some thing as above. I've included the CListCtrl (report view) on a dialog which in turn is on a tab page. Any ideas anyone? /Tommy Re: CListCtrl window disappears?! Tomasz Sowinski8-Nov-01 23:30 Tomasz Sowinski 8-Nov-01 23:30  I've included the CListCtrl (report view) on a dialog which in turn is on a tab page. But it isn't a propertypage/sheet, right? Probably you have a problem with z-order. Try to handle WM_ACTIVATEAPP and bring contents of tab to front. Tomasz Sowinski -- http://www.shooltz.com Re: CListCtrl window disappears?! Tommy H D Svensson9-Nov-01 1:13 Tommy H D Svensson 9-Nov-01 1:13  Yes you're right, no propertypage/sheet. But I tried to loacate which window is on top with GetTopWindow and from the result the CListCtrl should be on top, but maybe the result is incorrect when I'm in debug mode (see comments below). See if we can narrow the problem down. It works like this: I have my CTabStrl in the var m_TabCtrl. I've created several dialogs each of which is "activated" like this when I click on a tab: void CSystemInfoDlg::OnSelchangeTab1(NMHDR* pNMHDR, LRESULT* pResult) { ActivateTab(m_TabCtrl.GetCurSel()); *pResult = 0; } void CSystemInfoDlg::ActivateTab(int nTab) { if (pCurDlg) { pCurDlg->ShowWindow(SW_HIDE); } pCurDlg = pDlgs[nTab]; pCurDlg->ShowWindow(SW_SHOW); } When I try to debug it works?!!? I'm clicking on a CListCtrl which is on every pDlgs and after toggling away the app and toggling it back and then doing something to reach a breakpoint and then continue with F5, the CListCtrl shows up again... But that doesn't happen if I don't debug... Any ideas? /T Re: CListCtrl window disappears?! Tomasz Sowinski9-Nov-01 1:27 Tomasz Sowinski 9-Nov-01 1:27  I've dusted off one very old project I was involved in. There was similar problem - there was a CListCltr directly on CDialog (no list controls) which was disappearing after Alt+Tab. Adding a WM_ACTIVATEAPP handler solved the problem: void CSomeDlg::OnActivate(UINT nState, CWnd* pWndOther, BOOL bMinimized) { CDialog::OnActivate(nState, pWndOther, bMinimized); if (nState == WA_ACTIVE) { m_lst.BringWindowToTop(); } } Tomasz Sowinski -- http://www.shooltz.com Re: CListCtrl window disappears?! Tommy H D Svensson9-Nov-01 1:37 Tommy H D Svensson 9-Nov-01 1:37  Hmm, I did like this - Added ON_WM_ACTIVATEAPP in the message map - Added the OnActivate method to one of the dialogs - Added a breakpoint at CDialog::OnActivate(...) but the breakpoint was never found... Did I do something wrong? /T Re: CListCtrl window disappears?! Tomasz Sowinski9-Nov-01 1:57 Tomasz Sowinski 9-Nov-01 1:57  Did you use Alt+Tab when dialog is open? Tomasz Sowinski -- http://www.shooltz.com Re: CListCtrl window disappears?! Tommy H D Svensson9-Nov-01 2:22 Tommy H D Svensson 9-Nov-01 2:22  [Tomasz, please send me a mail instead because I have to poll for new messages... don't know why but I'm not getting any replies in my mailbox.] Yes, I clicked the tab -> the dialog with the CListCtrl showed up -> I clicked the CListCtrl somewhere -> tabbed away -> tabbed back -> the CListCtrl is gone. Now I wanted to check which window was on the top of the z-order by using GetTopWindow(). And I did this by reacting to a click on the dlg, not the CListCtrl, AFTER I had toggled back the app (that is when the CListCtrl had disappeared). So I set a breakpoint in the OnLButtonDown handler to check the handles for the dialog and the ctrl. If the CListCtrl is beneath the dialog then the handles of ctrl and top should NOT be equal. At least that's what I thought... void CsomeDlg::OnLButtonDown(UINT nFlags, CPoint point) { CWnd* ctrl = &m_List; CWnd* dlg = this; CWnd* top = GetTopWindow(); } The handles were all different... but that maybe depends on something else... what wa important here was that when I pressed F5 to continue running the app, the CListCtrl showed up again...?!?! Re: CListCtrl window disappears?! Tomasz Sowinski9-Nov-01 2:40 Tomasz Sowinski 9-Nov-01 2:40  Check top->GetDlgCtrlID(). It may give you an idea which window is on top, Tomasz Sowinski -- http://www.shooltz.com Re: CListCtrl window disappears?! Tommy H D Svensson9-Nov-01 2:59 Tommy H D Svensson 9-Nov-01 2:59  Yes, it did! It says the dialog is on top. But, from what I know the CListCtrl is a child window of the dialog and therefore the ctrl should be visible as well... or is it not a child window? Do I have to make an explicit call to m_List.Create from the dlg to make it a child? I always thought that I if I drag a ctrl on a dialog, the explicit creation of the ctrl is not needed since the wizard adds a variable for me and updates the DDX stuff... It's like the ctrl doesn't update its painting... Well, I'll send you a sample project. /T Re: CListCtrl window disappears?! Tomasz Sowinski9-Nov-01 3:07 Tomasz Sowinski 9-Nov-01 3:07  I've just realized that you're clicking on a dialog surface - it's no surprise that it becomes a top window. Anyway, I have no idea why aren't you getting a WM_ACTIVATEAPP message. Can you check with Spy++, if your app gets one when you Alt-Tab? BTW: you don't need to call Create on m_List. It's created by Windows during the call to DialogBox or CreateDialog. Tomasz Sowinski -- http://www.shooltz.com Re: CListCtrl window disappears?! Tommy H D Svensson9-Nov-01 5:58 Tommy H D Svensson 9-Nov-01 5:58  Hi Tomasz, I just got a solution to the problem with a little help from another Codeproject dude [thx Joel!]. The thing is that whenever a WM_ERASEBKGND is received by a CTabCtrl, all window children of CTabCtrl that are CListCtrls don't get properly repainted if they have been "focused". The fix is just to call RedrawWindow on the CListCtrl when ever appropriate. As always Tomasz, thx for your superb help and 'be there'-frequency! /Tommy Re: CListCtrl window disappears?! Tommy H D Svensson9-Nov-01 1:23 Tommy H D Svensson 9-Nov-01 1:23  Also, I must add, when the CListCtrl is gone I can activate parts of it by clicking "on it"... It lights up row wise but the entire CListCtrl border doesn't show... Somehow it reacts to my mouse clicks. Is it then possible it is hidden by a window with higher z since it responds to user actions? Removing Menu from Mainframe [James Pullicino]8-Nov-01 21:51 [James Pullicino] 8-Nov-01 21:51  Hi all, I would like to remove the menu from my mainframe in MFC. Does anybody know how? Thanks, James (2b || !2b)

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