|
I want to be able to browse to my website -- and have the webpage behave differently if my application is installed on this machine. I would like additional links to show up when it's installed here... or have the webpage figure out this is my home machine....
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.soonr.com">SoonR Inc.</A>
|
|
|
|
|
hai to all
i have created a thread function
void ThreadRoute1( void* arg )
{
USES_CONVERSION;
HANDLE hDir = CreateFile( "C:\\", // pointer to the file name
FILE_LIST_DIRECTORY, // access (read/write) mode
FILE_SHARE_READ|FILE_SHARE_DELETE, // share mode
NULL, // security descriptor
OPEN_EXISTING, // how to create
FILE_FLAG_BACKUP_SEMANTICS, // file attributes
NULL // file with attributes to copy
);
FILE_NOTIFY_INFORMATION Buffer[1024];
DWORD BytesReturned;
while( ReadDirectoryChangesW(
hDir, // handle to directory
&Buffer, // read results buffer
sizeof(Buffer), // length of buffer
TRUE, // monitoring option
FILE_NOTIFY_CHANGE_SECURITY|
FILE_NOTIFY_CHANGE_CREATION|
FILE_NOTIFY_CHANGE_LAST_ACCESS|
FILE_NOTIFY_CHANGE_LAST_WRITE|
FILE_NOTIFY_CHANGE_SIZE|
FILE_NOTIFY_CHANGE_ATTRIBUTES|
FILE_NOTIFY_CHANGE_DIR_NAME|
FILE_NOTIFY_CHANGE_FILE_NAME, // filter conditions
&BytesReturned, // bytes returned
NULL, // overlapped buffer
NULL// completion routine
))
{
CTime tm = CTime::GetCurrentTime();
CString helper_txt;
switch(Buffer[0].Action)
{
case FILE_ACTION_ADDED: break;
case FILE_ACTION_REMOVED:break;
case FILE_ACTION_MODIFIED: break;
case FILE_ACTION_RENAMED_OLD_NAME: break;
case FILE_ACTION_RENAMED_NEW_NAME: break;
}
int i=0;
do
{
m_Sec.Lock();
int item = pList1->InsertItem(pList1->GetItemCount(), CString(Buffer[i].FileName).Left(Buffer[i].FileNameLength / 2) );
pList1->SetItemText(item, 1, tm.Format("%Y/%m/%d/ - %H:%M:%S"));
i++;
m_Sec.Unlock();
}
while (!Buffer[i].NextEntryOffset);
}
}
i have called the thread by using a button click function.when i click the button the followinf function works
_beginthread( ThreadRoute1, 0,0 );
here i have a problem .the problem i need to pass a directory path which i have written in a edit box .how can i pass that path to the thread function which i created
please help me to solve this problem
|
|
|
|
|
hi
u can pass a void pointer parameter to thread by _beginthread() function.
_beginthread() syntex:
_beginthread(threadname, stack_size, void *parameter);
in ur case,
_beginthread(ThreadRoute1, 0, (void *)filepath);
In thread():
void ThreadRoute1( void* arg )
{
char *filepath;
filepath=arg;
.........
........
}
By
Parthiban
|
|
|
|
|
hai parthiban
thanks for ur reply.
but a small problem is there
an error is coming when i do this.
can u rectify it.
error C2440: '=' : cannot convert from 'void *' to 'char *'
|
|
|
|
|
C++ (unlike C) has to implicit converion from void*. Use explicit conversion:
char *pFilePath = reinterpret_cast<char*>(arg);
Steve
|
|
|
|
|
struct DataYouWantToPass
{
CString AString;
int ANumber;
};
DataYouWantToPass *pData = new DataYouWantToPass;
_beginthread(ThreadRoute1, 0, reinterpret_cast<void*>(pData));
void ThreadRoute1( void* arg )
{
DataYouWantToPass *pData = reinterpret_cast<DataYouWantToPass*>(arg);
Don't forget to see that the data is deleted when it's no longer needed.
Steve
|
|
|
|
|
hai stephen
thanks for ur reply
but in my problem i have got the directory path in a edit box control variable.
so how can i pass that variable to the thread function
please help me to solve this problem
|
|
|
|
|
hi
wat is type of the member variable? if type of the variable is value then u can directly assign it to the cstring variable of structure and pass it.
eg:
structvar.data=m_FilePath;
|
|
|
|
|
You have to be very careful. He's why:
void ThreadRoute1( void* arg )
{
int *pInt = reinerpret_cast<int*>(arg);
}
{
int v = 1;
_beginthread(ThreadRoute1, 0, reinterpret_cast<int*>(&v));
}
This is a recipe for disaster because for all you know the parent thread can make it to the point where "v" is out of scope before it is accessed in the child thread. This is why I use new in my previous example. He's a reworked version.
void ThreadRoute1( void* arg )
{
int *pInt = reinerpret_cast<int*>(arg);
delete pInt;
}
int *pInt = new int(1);
if ( _beginthread(ThreadRoute1, 0, reinterpret_cast<void*>(pInt)) == -1 )
{
delete pInt;
}
Steve
|
|
|
|
|
Hi all,
I have written the following code snippet to repaint all the child windows. But it not even repaints active child. Where I am wrong?
Thanks in advance,
Sarvan AL
void CMainFrame::OnSettingsChangeFont() <br />
{<br />
CFontDialog dlg ;<br />
if(dlg.DoModal() != IDOK) <br />
return ;<br />
<br />
m_strFontName = dlg.GetFaceName() ;
m_nFontSize = dlg.GetSize() ;<br />
<br />
CMDIChildWnd *pChildWnd = MDIGetActive() ;<br />
CView *pView = pChildWnd->GetActiveView() ;<br />
CDocument *pDoc = pView->GetDocument() ;<br />
pDoc->UpdateAllViews(pView) ;<br />
}
|
|
|
|
|
Hi
Actually do u want to change the fonts in view?
How u r setting the font in OnDraw() function?
|
|
|
|
|
Hi Parthiban,
This is how I am setting the font in my view's OnDraw. If I resize the child window, it gets repainted properly. But I am not able to do on my own.
void CProj5View::OnDraw(CDC* pDC)<br />
{<br />
CProj5Doc* pDoc = GetDocument(); <br />
ASSERT_VALID(pDoc);<br />
<br />
CFont title;<br />
title.CreatePointFont(<br />
((CMainFrame*)AfxGetMainWnd())->m_nFontSize, <br />
((CMainFrame*)AfxGetMainWnd())->m_strFontName, <br />
pDC);<br />
<br />
CFont* oldF=pDC->SelectObject(&title);<br />
...<br />
}
Are you able to conclude anything?
Thanks & Regards,
Sarvan AL
|
|
|
|
|
Hi,
i have a Linear Graph Control,i want to create Mutiple Instance`s of the Control and place them in Same view..The width of the clients Area is same for all the instance , only height will be variable..i need to CRect object as parameter to OnCreate function..what should i do to create mutiple instance same control in a view..with some gape between the Instances
Thanks in before
James
|
|
|
|
|
You mean you want to have the control duplicated (so, exactly the same things will be displayed on both controls) ?
I think you wanted to know how to have two instances of the same control no (it doesn't sound very logical to have the same instance duplicated) ?
If yes, you simply create another variable and create it like the first one. That's it.
|
|
|
|
|
Hi
If u want to use one control to display two or more results on same view or dialog, then place same control twice or thrice on view in design time, declare a variable for each and u can use it.
if u r creating control dynamically, then u can pass the CRect co-ordinates to create function of graph. Most of the graph controls have the option to specify the top left coordinates and right bottom coordinates.
|
|
|
|
|
I have written a MFC application program. Now, I need to create a link between the program to PCI 8255 to printer port. How should i do it and what DLL library should i download?
My hardware consists of sensors to send a signal to PCI 8255, then through parallel port to the software. Then the software will generate a word to be display on the LCD display of my hardware(not my computer monitor). How should I do it?
Help is apprciated..thanks
chris
|
|
|
|
|
|
Hi all,
The code below, works fine in debug version, but gives warning in "Release/Use MFC in Static Library/Code Generation/Multithreaded" configuration.
This is the warning message:
warning C4541: 'typeid' used on polymorphic type 'class CView' with /GR-; unpredictable behavior may result
void CMainFrame::OnUpdateFileClose(CCmdUI* pCmdUI) <br />
{<br />
BOOL bCanBeClosed = TRUE ;<br />
<br />
if(IsAnyChildWindowOpen())<br />
{<br />
CMDIChildWnd *pChildWnd = MDIGetActive() ;<br />
CView *pView = pChildWnd->GetActiveView() ;<br />
<br />
if(typeid(*pView) == typeid(CMyView1) ||<br />
typeid(*pView) == typeid(CMyView2)||<br />
typeid(*pView) == typeid(CMyView3) )<br />
bCanBeClosed = FALSE ;<br />
}<br />
pCmdUI->Enable(IsAnyChildWindowOpen() && <br />
bCanBeClosed) ;<br />
}
Kindly suggest me a solution. I am using VC6.0/Win2000.
Thanks in advance,
Sarvan AL
-- modified at 1:01 Tuesday 18th April, 2006
|
|
|
|
|
Edit the project settings for the release configuration and replace the /GR- option with /GR.
Steve
|
|
|
|
|
Maybe off topic; Or maybe not ... but
Sarvan AL wrote: if(typeid(*pView) == typeid(CMyView1) ||
typeid(*pView) == typeid(CMyView2)||
typeid(*pView) == typeid(CMyView3) )
This is a misuse of typeid. You should use dynamic_cast instead.
Maxwell Chen
|
|
|
|
|
Most programming guidelines would go even further - Don't misuse dynamic_cast; use virtual functions instead.
Steve
-- modified at 1:35 Tuesday 18th April, 2006
i.e.
class CBaseView : public CView
{
public:
virtual bool CanClose() const = 0;
};
class CMyView1 : public CBaseView
{
public:
virtual bool CanClose() const
{
return false;
}
};
class CMyOtherViews : public CBaseView
{
public:
virtual bool CanClose() const
{
return true;
}
};
pView->CanClose();</code>
This is basic OO design and good use the C++'s features.
|
|
|
|
|
Hi Stephen, Maxwell...
Thanks a lot for your immediate reply. It helped me to solve the problem.
Sarvan AL
|
|
|
|
|
Sarvan AL wrote: warning C4541: 'typeid' used on polymorphic type 'class CView' with /GR-; unpredictable behavior may result
I believe it's telling you that the .rdata sections will increase in size, which may or may not be desirable. It might also have something to do with RTTI.
"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain
"There is no death, only a change of worlds." - Native American Proverb
|
|
|
|
|
While being handy and nice, the MFC CHotKeyCtrl class does act weird sometimes, for example, it does not recognize the "space" key, instead, it rejects the keystroke and cleans all existing contents just like I pressed the "backspace" key. Now the funny thing is that, if I set the "space" key programmatically m_wndHotkey1.SetHotkey(VK_SPACE, 0); it will work, just that it cannot be specified by user input.
Unfortunately I really want the "space" key to be one of the configurable hotkeys in my application. Do I have a way to work around this problem? Thank you.
|
|
|
|
|
Try with:
UnregisterHotKey(...)
m_hotkey1.GetHotKey(...)
...
RegisterHotKey(...)
m_hotkey1.SetHotKey(...)
RegisterHotKey modifier flags defined in "CommCtrl.h" and "WinUser.h" are not same.
The values for fsModifiers are defined in "WinUser.h".
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
