Hi, In Internet Explorer, when I click on a link and go back to the previous site I am exactly at the same position of the document where I left. Even the link I clicked is still marked by a thin border. I have an application where I keep track on the history on my own. Now I need exactly the same behaviour. I think i need to save the "state" (scrollposition and "marked" link) in my history array and restore it afterwards when I load the old site again. Does anybody know how to achieve this? If this is hopeless it would also be enough to just save to current (scroll-)position. However, the loaded documents are complex with different divs which have overflow:auto, overflow:hidden etc. So I can't just get_body, query IHTMLTextContainer and afterwards get_scrollTop etc. because those would be the scroll stuff from the document itself... Thank you for any hints! :-)

I know what is my error: FindItem and SendMessage(LVM_FINDITEMA) only gives back the index of the found item but the control does not scroll automatically to that position. Is there a way to implement this? I already tried UpdateWindow() and also SetSelectionMark()... Thank you!

Hi and thank you for the help! I tried it with Spy++ and for testing, I typed an 'a'. The message is sent:

<00004> 00070E74 S LVM_FINDITEMA iStart:-1 plvfi:0012E8D8
<00005> 00070E74 R LVM_FINDITEMA iIndex: 86

I really don't know why my message handler is not called :-( Niki

Hi, I have an (owner drawn) list control and handle the LVN_ODFINDITEM message. For testing purposes:

void CIndexDlg::OnLvnOdfinditemData(NMHDR *pNMHDR, LRESULT *pResult)
{
LPNMLVFINDITEM pFindInfo = reinterpret_cast(pNMHDR);
*pResult = (rand() % 999) + 1;
}

This works good when typing something inside the control. But now I also want to have an external way to find an entry. So I places an edit control in the dialog and want to call FindItem manually:

LVFINDINFO fi;
ZeroMemory(&fi, sizeof(fi));
fi.flags = LVFI_PARTIAL | LVFI_STRING;
fi.psz = m_strWhat;

m_ctrlData.FindItem(&fi);
//m_ctrlData.SendMessage(LVM_FINDITEM, -1, (LPARAM)&fi);

But in this case, my OnLvnOdfinditemData handler never gets called! I also tried sending manually with SendMessage but it did not work either. What could be the problem?

...or is it better to write a

extern CMyApp theApp;

in every source file needed and use theApp.GetDabataseManager() ?

Ok :-) Is it a good way to store the "DatabaseManager" class as a pointer and do a new CDatabaseManager(filepath) inside my CMyApp::InitInstance() (and an appropriate delete in the destructor)? And then everytime I need it, just

dynamic_cast<cmyapp*>(AfxGetApp())->GetMyDatabase()

? Thank you, Niki

Hi, Where to best store a global object in an SDI app? In my case it's a "DatabaseManager" class for accessing an SQLite database. First it was just a member variable of my CDocument but now I need the object in many places in my app. So where to best store it? * Global variable? * Singleton object? * Member variable of CWinApp? * ... One problem: I want to open the database when constructing the object, so the object may throw an "DatabaseException". For this reason a global variable as well as a singleton seem to be suboptimal to me. Niki

Hi, thank you for this hint. I've been searching for a while now but I can not find any docs Do you have a reference, docs, howtos for subclassing CListBox in order to implement a virtual listbox? Any anyway, how do I query data from my database when "scrolling" very fast? I think i need to minimze my database queries but on the other hand I need to display something while scrolling... Regards, Niki

I have tried it using caching and virtual list controls. Even if I read only the elements from LVN_ODCACHEHINT and cache them into a map, the list is really, really tooo slow. What could be the solution? I just want to have the same as WinHelp32's keyword (or topic) search. For some reason, this list is very very fast since over 10 years (with slow computers). Regards, Niki

Just look at winhelp32 fulltext- or keyword search. This is exactly what I want to implement. Regards, Niki

Hello, I have to correct: The entries are much more than 100000...it's a fulltext recherche of a huge database system. So it's definitifely too large to just read out all entries and cache them. Regards, Niki

Hi, I need to display ~ 100000 entries in a windows list which are stored in an SQL database (queried by a SELECT query with a few JOINs). 1st question: In only need to display a simple list. I would really like to use a Listbox Control for the sake of simplicity. Do I really need to choose a (complex) List Control? 2nd question: I tried a virtual list with a simple SQL query:

OnInitDialog()
...
// SELECT COUNT(*) FROM...
m_ctrlWords.SetItemCountEx(count);
....

OnLvnGetdispinfoWords(...)
...
sql.Format("SELECT keywordID, keyword FROM keywords ORDER BY keyword LIMIT %d, 1", index);
// query
const char *res = query.getStringField("keyword");
lstrcpy(pItem->pszText, res);

but this is really too slow. I think I need OnLvnOdcachehintWords but it's somehow complicated. I could not find any concepts (which data structure to choose??) or examples concerning this :-( The problem is that I have to remove old entried in cache (or my app's memory consumption would explode). Does anyone have implemented such a virtual list (with data in SQL) already? Are there some examples or concepts available? Thank you very much, Niki

Thank you very much, I've enabled it now and use dynamic_cast. Yes, I habe VS 2003 .NET. Niki

Hello, Is there any reason why dynamic_cast<> is turned off in my MFC projects by default? I always get (in Debug and Release builds).

warning C4541: 'dynamic_cast' für polymorphen Typ 'CWnd' mit /GR- verwendet; unvorhersehbares Verhalten möglich

Is there any reason to not add the /GR switch? Why is this not done by default? The whole C-style casting with objects in the MFC code itself is really bad coding style anyway (C-style casts should not be used any more in C++) Regards, Niki

Thank you! This seems to do exactly what I was looking for! Regards, Niki

Hello, It sounds crazy but how can I disable and hide my current view in my SDI app (CHtmlView) (and afterwards display it again)? [1] I've tried SetVisible and EnableWindow but it does not work. Background: In a modal dialog I temporarily load a different page for printing. The user should not see that there is another page loading or printing. Regards, Niki [1] With hide/disable I mean e.g. that the current view is just white or even better: just frozen.

Hello and thank you for your answer! I do not want to check if the document has printed successfully but it should just be successfully appended to the queue (before the new document is loaded). I think I managed this (the following code is done in a modal dialog):

// pView is a pointer to my current view (CHtmlView)

// get currently loaded document
CString currentUrl = pView->GetLocationURL();
// load document to be printed
pView->Pall();
// wait until the document has loaded successfully
while(pView->GetReadyState() != READYSTATE_COMPLETE)
{
((CMyApp*)AfxGetApp())->Yeild();
}
// FIXXXME: IS THIS OPERATION REALLY BLOCKING?
pView->OnCmdMsg(ID_FILE_PRINT, 0, 0, 0);
// restore old document
pView->Navigate(currentUrl);
// return to my app
EndDialog(FALSE);

The OnCmdMsg(ID_FILE_PRINT) does nothing more than ExecWB(OLECMDID_PRINT,...) in the IWebBrowser2. And now my "backup question" is. You said: "Being slightly serious, the OnCmdMsg (ID_FILE_PRINT, 0, 0, 0) shouldn't return until it's finished its bit of the printing process." Are you sure that ExecWB(OLECMDID_PRINT,...) will block until the currently loaded document has been printed so that I can issue the next Navigate(...) call just afterwards? In my tests it works but I am not sure about this. Regards, Niki

I have forgotten a very important issue: The view is a CHtmlView. So my view does not have an own printing mechanism

The problem was not the browser control itself but my async pluggable protocol! I missed to handle PARSE_SECURE_URL for the secure manager so two different URLs in my protocol were essentially in a different domain. So I got "permission denied"-messages when accessing different frames (cross frame scripting prevention) Regards, Niki

Hello, In my application, I send a print command to my view from a (modal) dialog:

pView->OnCmdMsg(ID_FILE_PRINT, 0, 0, 0);

How can I wait until the printing process has been finished? Background: In my dialog I want to be able to print other data than loaded into the current view. For this purpose, I save the state of the current view, load another document, print it and afterthe document has finished printing I reload the old document again and close the dialog. Thank you and regards, Niki