C / C++ / MFC

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Message queues of windows? Frankie17-Jul-01 21:02 Frankie 17-Jul-01 21:02  Hi, I have an application that makes use of a splitter window. One pane makes use of several (up to sometimes 20) CView deriven windows. Each of this views has a lot of child CWnd deriven windows and each such a window also has child controls like CCombo, CEdit CLisBox etc. Now I have a serious performance problem I think. My theory is that al the windows are 'eating' performance by means of their message queues, is this possible? And if so, is it possible to stop these queues for the above described views that are not active? Or is there a solution to decrease CPU use? Hope someone can help me with this. Regards, Frank. Re: Message queues of windows? Michael Dunn17-Jul-01 21:21 Michael Dunn 17-Jul-01 21:21  A message queue belongs to a thread, not a window, so you could have 15000 windows but they'd share the same queue. My guess is that any slowdown would be due to MFC having to walk the message maps of all the views whenever a message is sent to your app. --Mike-- http://home.inreach.com/mdunn/ Sometimes, arming yourself with a big pointy stake just won't do you any good. Re: Message queues of windows? Frankie17-Jul-01 22:02 Frankie 17-Jul-01 22:02  Ok..I think I understand my problem now. I have a lot of CWnd deriven windows in each view which all have their own message map, each of these windows also have child windows which also have their own message map. Some numbers: 10 view classes, with each 10 windows and each of this window 20 sub windows -> say more than 220 windows that have their own message map. Could this cause my program to be very slow? And is there by any means a way to speed up the proces, work around the message map, or let MFC know not to walk through the message maps of certain windows (say all windows in the views that are not active?) How to capture Events & HTML content in Netscape browser PrashanthBA17-Jul-01 19:09 PrashanthBA 17-Jul-01 19:09  Hi Friends, - I need to know following things a) how to capture html text displayed in the Netscape Browser. b) how to capture the events like Key down, Key Up events in the Netscape Browser In any one of these programming languages C ,C++ or VC++, Java. Thanks, Prashanth Prashanth BA Changing pointer in CDaoRecordset ... Hadi Rezaee17-Jul-01 18:26 Hadi Rezaee 17-Jul-01 18:26  Hi all, I want to know how can i change pointer with giving the number for pointing ??? I mean, when i give 2 to function it must point to record two ... I have algorothm for myself: m_rs->Move(lLink - m_rs->GetAbsolutePosition() - 1); lLink is variable that i get of user for pointing ... Do you have any good idea ? My month article: Game programming by DirectX by Lan Mader. Please visit in: www.geocities.com/hadi_rezaie/index.html Hadi Rezaie MFC -- verifying that a folder exists Stephane Denis17-Jul-01 17:28 Stephane Denis 17-Jul-01 17:28  I do you verify that a folder exists with MFC? Thanks Re: MFC -- verifying that a folder exists Derek Waters17-Jul-01 17:37 Derek Waters 17-Jul-01 17:37  Try: if (GetFileAttributes("My filename") & FILE_ATTRIBUTE_DIRECTORY) { // The directory exists } ------------------------ Derek Waters derek@lj-oz.com coloured scroll bars Nick Blumhardt17-Jul-01 16:45 Nick Blumhardt 17-Jul-01 16:45  Are the coloured scroll bars (on the codeproject website if you have IE5.5+) able to be achieved in C++ apps? i.e., is there a new version of the common controls with an extended FlatSB api or what??? Would be so perfect for some stuff we're doing here. Nb Sending Email in Win32 Nick Blumhardt17-Jul-01 12:49 Nick Blumhardt 17-Jul-01 12:49  Hi all, Is there an API function to send emails? We need to send email from an NT service... haven't come across anything so far. thanks n Re: Sending Email in Win32 17-Jul-01 15:11 17-Jul-01 15:11  How do you want to do it? MAPI, sockets, something else? Re: Sending Email in Win32 Nick Blumhardt17-Jul-01 16:42 Nick Blumhardt 17-Jul-01 16:42  oops- MAPI is what I was looking for Re: Sending Email in Win32 18-Jul-01 2:22 18-Jul-01 2:22  Check MSDN, the MAPI methods, oddly enough, are prefixed with mapi. I.E. MAPILogon, MAPISendMail, etc. Controls. John Uhlenbrock17-Jul-01 12:25 John Uhlenbrock 17-Jul-01 12:25  I have a group-box enclosing 4 check boxes. I want to keep the group box, but I also want to be able to check any number of the check boxes. How can I do this? As well, how can I keep my SDI formview based app from being re-sized? Thanks, John. Re: Controls. Tim Deveaux17-Jul-01 14:06 Tim Deveaux 17-Jul-01 14:06  Er - from memory if you play with the Group check box in the properties of the cb controls, you should get it - works for radio buttons too I think. In InitInstance you'll see the main window handled - if you call ModifyStyle to remove the WS_THICKFRAME style for it you should effectively make the window unresizable. Hmmmm might look at WM_MAXIMIZEBOX as well.. Re: Controls. Michael Dunn17-Jul-01 14:13 Michael Dunn 17-Jul-01 14:13  Check a checkbox with CheckDlgButton() - it doesn't matter how many you have or whether they're in a group box. --Mike-- http://home.inreach.com/mdunn/ Sometimes, arming yourself with a big pointy stake just won't do you any good. Dialog bars. John Uhlenbrock17-Jul-01 11:36 John Uhlenbrock 17-Jul-01 11:36  Still looking for an answer to.... MSDN states: "While it is normal to derive your own dialog classes from CDialog, you do not typically derive your own class for a dialog bar. Dialog bars are extensions to a main window and any dialog-bar control-notification messages, such as BN_CLICKED or EN_CHANGE, will be sent to the parent of the dialog bar — the main window." I do not know how to use a dialog bar's controls. I can load the dialog bar, but I can't activate the bottons so they may be pressed, I can't set text in textboxes, I can't set the status of check-boxes. How are you supposed to get variables associated with the controls on the dialog bar if you don't have a derived class. Thanks, John Re: Dialog bars. Tomasz Sowinski17-Jul-01 23:24 Tomasz Sowinski 17-Jul-01 23:24  Your need a command handler implemented in CMainFrame class to enable button and respond to events. You just have to add this manually. Assuming that your button has and IDC_BUTTON1 id, you have to: 1) insert member declaration in Mainfrm.h: afx_msg void OnButton1(); Add this line outside the //{{AFX_MSG block 2) insert member definition in Mainfrm.cpp void CMainFrame::OnButton1() { AfxMessageBox("Button1 pressed."); } 3) add appropriate entry to message map in Mainfrm.cpp ON_COMMAND(IDC_BUTTON1, OnButton1) It's safer to have this line outside the //{{AFX_MSG_MAP block - ClassWizard has the tendency to overwrite stuff inside //{{AFX_xxx. Well, that's all - you should see the msgbox after pressing the button. If you want to conditionally enable/disable control (like toolbar buttons or menu items), use ON_UPDATE_COMMAND_UI macro. How are you supposed to get variables associated with the controls on the dialog bar if you don't have a derived class Your CMainFrame probably has a CDialogBar member, say m_dlgbar. Use m_dlgbar.GetDlgItem(IDC_YOURCONTROL) to get access to specific controls. For example, to get access to edit box located on a dialog bar, use this: CEdit *pEdit = (CEdit *)m_dlgbar.GetDlgItem(IDC_MYEDIT1); Tomasz Sowinski -- http://www.shooltz.com Debug Question 17-Jul-01 11:21 17-Jul-01 11:21  Hi, Is there a possibility to catch when the program is under debug mode of MSVC or not ? ( program is with the debug info in the both cases ) Re: Debug Question Michael Dunn17-Jul-01 11:23 Michael Dunn 17-Jul-01 11:23  Call IsDebuggerPresent() --Mike-- http://home.inreach.com/mdunn/ Sometimes, arming yourself with a big pointy stake just won't do you any good. CToolbar::GetToolBarCtrl().SaveState 17-Jul-01 10:51 17-Jul-01 10:51  I would really appreciate it if someone would give me a little help with trying to get my program to save the state of the toolbars when I exit. I am using standard MFC generated CToolbar objects and calling the GetToolBarCtrl function to access the CToolbarCtrl functions and trying to use SaveState. Following is my code. The SettingsRegKey is a Cstring with the path to my program in the registry that already exists although the value the SaveState function is supposed to add does not. Any ideas why it is not working? Thank you very much CString SettingsRegKey = _T("Software\\Star\\Star\\Settings"); m_wndStandardToolBar.GetToolBarCtrl().SaveState(HKEY_CURRENT_USER, SettingsRegKey, _T("Standard ToolBar")); Docking Bar from DLL Steve The Plant17-Jul-01 9:52 Steve The Plant 17-Jul-01 9:52  Hey! I've got a plugin system working in my app and it works great. One thing I'd like to be able to do is to have some of the plug-ins automatically doc themselves to the app window (like a toolbar). I've tried several methods, but haven't figured it out yet. Any help? Steve The Plant Re: Docking Bar from DLL Steve The Plant17-Jul-01 16:12 Steve The Plant 17-Jul-01 16:12  I think I wrote that question too quickly. I guess it would help to say that I'm working in MFC. And that each plugin is stored in a DLL. So, that means I wonder if there's a way to dock a toolbar (that's basically just a CToolBar or Docking Dialog bar) stored inside a DLL onto my main app frame. I've tried passing the window handle and the actual pointer of the main frame to the DLL and then trying to dock the toolbar (contained inside the DLL), but it doesn't work. I get assertions and other errors. I do call that AFX_ function (forgot the name since I'm not at work) inside each DLL function before doing anything in MFC. Does anybody have any suggestions? Ideas? Steve The Plant Re: Docking Bar from DLL Tomasz Sowinski17-Jul-01 23:09 Tomasz Sowinski 17-Jul-01 23:09  What kind of DLL it is? Is it an 'extension DLL' (sharing a copy of MFC with the app) or 'regular DLL'? Tomasz Sowinski -- http://www.shooltz.com Re: Docking Bar from DLL Steve The Plant18-Jul-01 4:00 Steve The Plant 18-Jul-01 4:00  It's just a "regular" DLL. The Toolbar stored in the DLL would be created and docked at runtime. Steve The Plant Re: Docking Bar from DLL Tomasz Sowinski18-Jul-01 4:09 Tomasz Sowinski 18-Jul-01 4:09  You should consider using 'extension' dll - they should just snap into main exe and whole system would be one app from MFC point of view. Exe and dlls would share global maps used for mapping HWNDs to CWnds, etc. This makes passing CWnd pointer around possible. You can't achieve that with 'regular' dlls - the dll doesn't know that exe uses MFC and vice versa. Tomasz Sowinski -- http://www.shooltz.com

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