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BOOL CMyScrollView::OnScroll(UINT nScrollCode, UINT nPos, BOOL
bDoScroll)
{
SCROLLINFO info;
info.cbSize = sizeof(SCROLLINFO);
info.fMask = SIF_TRACKPOS;
if (LOBYTE(nScrollCode) == SB_THUMBTRACK)
{
GetScrollInfo(SB_HORZ, &info);
nPos = info.nTrackPos;
}
if (HIBYTE(nScrollCode) == SB_THUMBTRACK)
{
GetScrollInfo(SB_VERT, &info);
nPos = info.nTrackPos;
}
return CScrollView::OnScroll(nScrollCode, nPos, bDoScroll);
}
This method could be found on MSDN site which we also used. It handles the above 32k range for scrollview. One thing that I also noticed is the SB_THUMBTRACK in win7 is that, it was much bigger compared in the XP and Vista Environment. My thought is that if the SB_THUMBTRACK size varies the size of the scrollview, is it possible that some default value in win7 environment affects the maximum scrollsize range?
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I would like to know how did you resolve the problem in your case. I might wanna try since there is still no fix yet until now. This problem is so rare that no one could relate my situation.
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Hello,
In my case the problem was just with screen refreshing on Win7. Updating graphics card driver or turning Windows AERO off on user's computer solved the problem. So I think my case was different from yours. The only one thing is the same in our cases: WinXP worked fine, Win7 did not.
If I undarstand your app correctly, you are creating many GDI objects (many Cwnd obj.). It is a surprise for me, because normally there is a limit for GDI in application. If you reach that limit, method: CWnd::Create() fails. The value of GDI count is written in Windows registry. Unfortunately I don't remember the regkey. But I think this also not your case, since you have got probles with controls overlapping from certain point of scroll pos.
Maybe the problem is not with ScrollBar, but with scrolled out CScrollView. Maybe you have reached the end of CScrollView and your application is trying to draw all controls at the end of CScrollView?
I think you can try to change your mechanics in app. Do something like this:
Do not let your application to scroll View so far (above 32k). It is not necessary. Try to hide/delete controls, if are scrolled out from visible part of View and show/create controls, which has to be shown after scrolling.
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Thanks for the reply. I have tried monitoring the GDI and user objects in the task manager and found out that it only consumes about 30-50 GDI objects & 1.8k-7k user objects in the page that has the bug display. It hasn't reached yet the 10k limit for the user object so it might not be the cause of the GUI problem in the scrollview. I also tried increasing the limit of the user object around 18-20k but still no effect on the output. I really hope someone has a bugfix on this. (probably microsoft)
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Hi
My rich edit displays the text I streamed in
Somewhere in the middle of the text
I have tried various methods e.g. GetCurrentLine
LineIndex with a value of -1 to get the current line
Index to use in LineScroll to scroll back to the top
Of the rich edit but each of these methods returns
0
Any help appreciated it
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First call LineIndex(-1) and feed that result into LineFromChar().
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous
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hI
I Get Zero returned from both functions as I was tracing the return value with the value in the EAX
register
theline = myedit->LineFromChar(myedit->LineIndex(-1));
000000013FE55D61 or edx,0FFFFFFFFh
000000013FE55D64 mov rcx,qword ptr [rbx+180h]
000000013FE55D6B call CRichEditCtrl::LineIndex (13FE593C8h)
000000013FE55D70 mov rcx,qword ptr [rbx+180h]
000000013FE55D77 movsxd r9,eax
000000013FE55D7A xor r8d,r8d
000000013FE55D7D mov edx,436h
000000013FE55D82 mov rcx,qword ptr [rcx+40h]
000000013FE55D86 call qword ptr [__imp_SendMessageA (13FE719D0h)]
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ForNow wrote:
I Get Zero returned from both functions...
Does the control have multiline text in it? What line is the caret on?
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous
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It is multiline because a whole bunch
Of text is displayed
The caret/cursor doesn't appear visually anywhere
Whitin the body of text displayed
Thanks
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ForNow wrote: The caret/cursor doesn't appear visually anywhere Whitin the body of text displayed
Which may be the problem? I just created a test project, added a rich edit control with the WS_VSCROLL, WS_HSCROLL, and ES_MULTILINE styles, and the caret was visible and moveable.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous
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Thanks I don't have WS_HSCROLL and WS_VSCROLL
I'll insert those styles and re-try
I am at work now will try tommorow night
Thank you very much
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Hi
I added to ES_AUTOHSCROLL and VSCROLL
The Caret seems to appear in the middle of the text but no scrolling here is a snipet of my code
<pre lang= 'cpp'>
in CProgDebug::ONINITDIALOG
long start, end, theline;
myedit = new CProgedit; // allocate the richedit
UpdateData(FALSE); // connect to dilog object
// myedit->SetOptions(ECOOP_OR, ECO_AUTOVSCROLL | ECO_AUTOHSCROLL);
EDITSTREAM es;
// Set the ENM_REQUESTRESIZE event flag
// myedit->SetEventMask( ENM_REQUESTRESIZE ); // set notificate to keep number of charcters in view
// Force the control to issue a EN_REQUESTRESIZE notification
// myedit->RequestResize( );
CStdioFile *fileptr = new CStdioFile;
fileptr->Open(proglisting,CFile::typeBinary);
es.dwCookie = (DWORD) fileptr;
es.dwError = 0;
es.pfnCallback = (EDITSTREAMCALLBACK) readlisting;
myedit->StreamIn(SF_TEXT, es);
myedit->SetFocus();
theline = myedit->LineFromChar(myedit->LineIndex(-1));
myedit->LineScroll(-theline,0);
myedit->HideSelection(TRUE,FALSE);
ShowWindow(SW_SHOW);
CDialog::OnInitDialog();
return TRUE;
}
</pre>
IDD_PROGDBG DIALOGEX 0, 0, 779, 345
STYLE DS_SETFONT | DS_MODALFRAME |WS_MINIMIZEBOX | WS_POPUP | WS_CAPTION | WS_SYSMENU
EXSTYLE WS_EX_APPWINDOW
CAPTION "Debug Dialog"
MENU IDR_HERC_CMDTYPE
FONT 8, "Times New Roman", 400, 0, 0x0
BEGIN
CONTROL "",IDC_RICHEDIT22,"RichEdit20A",WS_CHILD | ES_AUTOVSCROLL | ES_AUTOHSCROLL | ES_MULTILINE | WS_BORDER | WS_TABSTOP,17,39,735,273
END
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I am trying to figure out how to create a emulator that loads multiple generic hid mouse devices in c (or generic mouse devices). Generic drivers are ones that are included with windows already. Anyone know where I should start or if this would be a hard task?
The end result is to make a c driver that emulates mouse input like the sendinput api except with multiple mouse devices.
The programs I was trying to get this to work in are: programs created with Microsoft multipoint sdk and Microsoft mouse mischief.
So far I do not have a c driver but have the technical details of the device on my project page (I want to get rid of dsf since its not 64-bit compatible): http://kinectmultipoint.codeplex.com. The emulator on the project does work now but I want to try and code a better system in.
jeffery
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Hello Every one,
I am adding some key in Registry is not getting into effect until system reboot or by killing explorer.
so how can i achieve it, without rebooting and killing explorer.
please help me out ..
Regards
sarfaraz
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You shouldn't need to reboot unless registry key was in HKLM rather than user's own HKU hive.
Just log out and back in again. What was the reg key?
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What process is it that needs to read the newly added key?
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous
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I have done with shell API SHChangeNotify.
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Ok, but that does not answer my question.
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous
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I want to ask you something: why CBitmap::CreateCompatibleBitmap() fail on large bitmap files ? I have:
VERIFY(m_Bitmap.CreateCompatibleBitmap(pDC, nWidth, nHeight));
and on large bitmaps, on debug, I get assert error ... why ?
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Call GetLastError() upon failure to know more about the reason.
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Thank you, I had tried to see what GetLastError get me, but get me nothing, I mean 0 ... always 0 ...
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There are situations that GetLastError() returns 0 when the call fails (from MSDN and looking at the source of the MFC function):
- When a bitmap handle is already attached to the
CBitmap (asserts also); - When using Windows 9x (last error is never set, size is limited to 16 MB);
- When this can happen without being documented in the MSDN.
I hope this information helps you to find the reason.
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Hello Everybody,
I am trying to pass some values to char ** (to a third party library). But i am getting some issue in that.
char** ids = new char*[m_Size];
for(int i=0; i<m_Size; i++)
{
ids[i] = mSizes[i].GetBuffer(mSizes[i].GetLength()); }
using that third party function, its creating an output file and in that file the stored value is showing like this.
GROUP : 46,0
GROUP : 44,0
GROUP : 42,0
GROUP : ÝÝÝÝÝÝÝ݆«ãe,0
GROUP : 40,0
GROUP : 38,0
But if I give values like this, then in output file, the values are showing fine.
char* ids[6] = {"38", "40", "42", "44", "46", "48"};
in the output file,
GROUP : 38,0
GROUP : 40,0
GROUP : 42,0
GROUP : 44,0
GROUP : 46,0
GROUP : 48,0
(see the sequence also)
what i am doing wrong? initialization ? or passing values ?
Thanks,
A. Gopinath.
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The code looks fine. Because only one of the strings from your array returns wrong data, this element may be corrupted somewhere else.
Note also that you must call ReleaseBuffer() for each string array element after calling the library function. If not doing so, further accesses may return invalid data.
You should also check the documentation of the library if the passed strings are constant or may be changed. If they may be changed, you must pass the max. allowed length to GetBuffer().
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char** ids = new char*[m_Size];
Here you create an array of char pointers.
Here:
ids[i] =
you need to create an aray of chars, so it should be ids[i] = new char [<some number="">]
Then copy the data into the char array.
==============================
Nothing to say.
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