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I am working on simple visual recognition program.
I have two bitmaps - background and background plus unknown object.
I can do convolution to filter out the unknown object, but I cannot figure out how to store the result for further processing.
So far I have same size bitmap with "empty" pixels.
Evetually I'll need to determine the shape of the object and I am looking for some kinda of trace algorithm to save this resulting image.
Thanks for your help Vaclav
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I am trying to do this on my own at home, but have a serious need at work for the following DLL. I can do this in VB unfortunately WinRunner can not use VB DLL's since they are COM servers.
I wrote a simple dll that works but the this project is requires a message box.
I need a c++ dll that
a) I can launch a modalless message box with message passed.
b) keep on top
c) place on screen using x,y
d) close
Can anyone help me? I've never written a c++ dialog before.
thanks all
dhermann@ameriquest.net
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I put a dll on
http://www.immenro.de/test/diadll.dll
you can download it there
the method is called
call_it(int x, int y, int cx, int cy, CString text)
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Is there a way I can perform pointer arithmetic on an iterator? I have a function that goes through a long CString object first and stores the positions of the spaces in a vector<int> object. Going through the normal steps of iterating through each, I am able to get single words, and that works fine. However, the user will have to be able to specify how many words they want extracted at a time, which is held in m_nWordCount. right now I have something like this:
for(iter = intVec.begin(); iter != intVec.end(); )
{
nTemp = *iter;
iter++;
int nTemp2 = *iter;
nTemp++;
strWord = strTemp.Mid(nTemp ,nTemp2 - nTemp);
sWord.word = strWord.Trim();
if(sWord.word.GetLength() > 0)
::vecWords.push_back(sWord);
}
the problem line above is in bold (although it works for one word)
what I want to be able to do is this:
int nTemp2 = *(iter + m_nWordCount);
so that if the user specified 2 as the word count it would get whatever the value is at 2 spaces up.
(first position is 0, second is 5, third is 12)
this would allow them to get the string from position 0 to 12)
of course then I would also have to put my iterator incrementation back in the 'for' loop declaration
Thanks In Advance;)
If it's broken, I probably did it
bdiamond
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Sorry, I seem to have found the answer, except for one problem. If I put this it works:
vector<int>::iterator tempIter = iter + 2;
but this doesn't:
vector<int>::iterator tempIter = iter + m_nWordCount;
I get this error when I try to use the variable instead of the hard-coded number:
error C2678: binary '+' : no operator found which takes a left-hand operand of type 'std::vector<_Ty>::iterator' (or there is no acceptable conversion)
If it's broken, I probably did it
bdiamond
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duh! I was trying to use a CString variable
If it's broken, I probably did it
bdiamond
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It sounds like when you are iterating through the string, you need to keep a count (N) of how many word breaks have been found so far. If that count is evenly divisible by m_nWordCount, add what has been found up to that point to the array and reset the count N. Make sense?
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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Hi everybody.
I have a simple question.
I have a CByteArray object and I need to convert it to a VARIANT, how could I do that.
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Hi Roger,
Well... there is probably a nicer way, but if you're using MFC you could do:
VARIANT aVariant = COleVariant(myByteArray).Detach();
It's a bit lazy, but hey...
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Hi everybody.
I have a simple question.
I have a CByteArray object and I need to convert it to a VARIANT, how could I do that.
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Does anyone have experience of automating this (ActiveX or not) ?
I am thinking of producing a little DJing application (using MP3) and this has the best codec by far.
I've already looked at MSDN but information is a bit short there - getting current position etc..
Ta.
Elaine ![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
The tigress is here 
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Has anyone created a class to use a Date/Time picker in a cell of a CListCtrl ?
Cheers,
Andy
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Hello.
First, I'd like you to take a look at this post from another forum: http://www.codeguru.com/forum/showthread.php?s=4f35cbebe00b8299d7c4f45da97051c1&threadid=193904 (it explains the problem with CSerialPort -- this should also be brought to the attention of the authors of the class)
Anyway, I came across the exact same problem, except I was not using the class. I simply had WaitCommEvent and GetLastError() give me the same error 87 using this piece of code:
if (WaitCommEvent(hCom, &event, &obj))
{
cout << "Character Detected! ";
fsuccess = ReadFile (hCom, &data, 1, &transferred, &obj);
if (fsuccess)
cout << "Character Read! Here it is: " << data;
getch();
}
else
{
if (GetLastError() == ERROR_IO_PENDING)
cout << "Still waiting";
else
{
cout << "Fatal error: " << GetLastError();
getch();
exit(1);
}
}
As I said, the output for this program is Fatal error: 87. I should explain, this is after the COM1 port has been opened successfully for reading. Does anyone have any suggestions as to how to solve this? I will be very thankful if someone could help.
Thanks..
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I am receiving a struct which has floats, int etc. I use ntohl etc on the ints and it all works fine. But on the floats, I am not sure what to use to get the bits in the right order. I had thought that ntohl will take any 32 bit number and convert it but I know when I use it, it does not convert it correctly. I tried to convert it myself one bit at a time and it is OK. Is there an easier way with a call already done?
Thanks in advance.
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float floatVal =
unsigned long *longPtr = (unsigned long*)&floatVal;
*longPtr = ntohl(*longPtr);
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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I have a question regarding standard out. I would like to re-direct standard out to a pipe. To connect to the pipe, I use CreateFile. Then, I must use WriteFile to send over the pipe. Is there a way to do this without the WriteFile call. Instead, simply redirect the standard out stream to the Pipe.
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As everything in Windows are represented by handles, you can use GetStdHandle and SetStdHandle to operate on the standard stream handles (file handles). Just use CreateFile to create and connect the pipe, then use SetStdHandle with appropriate parameters to redirect the standard stream into the pipe.
These functions will redirect the standard streams or get their handles for the current process only. So for all other processes, the streams remain normal. But it's good practise nevertheless to first use GetStdHandle, save it, and restore it back after you're done.
-Antti Keskinen
----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.
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Hi.. I have an application that create the thread at PRINT button is clicked, and stop the thread when STOP PRINTING button is clicked.
<br />
UINT PrintFile(LPVOID lParam)<br />
{<br />
myApp *cc=(myApp*)lParam;<br />
while(!stopprinting)<br />
{ <br />
if(stopprinting)<br />
{ <br />
break;<br />
}<br />
cc->myClass->Print()<br />
} <br />
return 0;<br />
}<br />
<br />
void myApp::print()<br />
{<br />
....<br />
CWinThread *printingThread; <br />
printingThread = AfxBeginThread(PrintFile,this);<br />
printingThread->m_bAutoDelete = FALSE;<br />
}<br />
then I have a class called myClass in the same application. myClass print the files, it ofcourse, has other functions except Print().
Ok here how Print() does print the file
<br />
void myClass::Print()<br />
{<br />
for(int i=0;i<10;i++) <br />
{<br />
CString f= array[i];<br />
PrintFile(f);
finishedprinting = false;<br />
WaitForFilePrinted();<br />
finifhsedprinting = true;<br />
<br />
}<br />
}<br />
The printer server send the window messages when the file starts and ends printing doc, to application and myApp catch those messages. I had to used RegisterWindowMessage() and in MessageMap
I add following statement,
ON_REGISTERED_MESSAGE(BlackIcePrintMessage,OnPrinterMsg)
and then OnPrinterMsg() catch the messages and do something when the document get started printing, and ended printing. when the document get printed, finishedPrinting get set to true
<br />
finishedprinting = true;<br />
I want my application to be continue on the next file if and only if finishedprinting = true.
so I wrote following function to wait for the file to really get printed.
<br />
UINT WaitForFilePrinted(LPVOID lParam)<br />
{<br />
myClass *cc=(myClass*)lParam;<br />
while(!finishedprinting)<br />
{ <br />
if(finishedprinting)<br />
{ <br />
break;<br />
}<br />
cc->WaitForPrinter();<br />
} <br />
AfxEndThread(1); <br />
return 0;<br />
}<br />
void myClass::WaitForFilePrinted(void)<br />
{<br />
CWinThread *printingThread; <br />
printingThread = AfxBeginThread(WaitForFilePrinted,this);<br />
printingThread->m_bAutoDelete = FALSE;<br />
<br />
}<br />
<br />
void myClass::WaitForPrinter(void)<br />
{<br />
while(!finishedprinting)<br />
Sleep(500);<br />
}<br />
I'm not sure I'm doing the right thing. And it is seems like thread inside another thread. it is not doing what I want to do..and I got access error. All I want is that
send the file to the printer..
wait for the messages from the printer..
when I get the message that the printer said the file get printed.. send next file
keep the same process, untill all the files gets printed.
could you please give me some suggestion how should I pause myApp so it will wait for the file just send to printer gets printed and then move on next one?
thank you
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Too much code. Just succinctly explain what you want to accomplish.
Kuphryn
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Ok. Here what I want.
I have to print the files (sending to the printer).
I want to send next file after the current file is finished printing.
To do so, I can catch the messages that sent from printer (the printer that can send the messages to application) and respond differently to different messages like
. record the time of the file starts printing when application recieves STARTDOC message,
. record the time of the file finished printing, number of pages printed, and print the next one when application recieves ENDDOC message.
How to recieve the messages from printer.
The printer sends the messages like window messages to the application.
I used RegisterWindowMessage() and add ON_REGISTER_MESSAGE(printermsg,OnPrinterMessage) in the MESSAGE_MAP. I have no problem getting messages from printer.
Here the prolem comes,
My application has the button called "PRINT" and "STOP".
When user click on PRINT all the files get printed one after another. but it stop printing immediately when STOP button get hits.
So what should I do to look at printer messages to print one file after another, and at the same time, whatching if the STOP button get hited to stop printing immediately.
Thank you.
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CPU usage increases for list view for same app under XP
-------------------------------------------------------
I've been working on an application for several years which uses MS ListView controls to display large grids of data (perhaps 50 lines by 100 columns).
background: The application displays market data, amongst other things, from electronic exchanges.
The application updates individual cells relatively rapidly.
I handled the CustomDraw events to provide formatting such as colors.
The list view is in virtual mode.
All was well on Win2000. CPU usage was reasonable. However, when I open the same window under XP, the CPU usage seems to increase dramatically.
I used the ATLControls.h list view wrapper as a thin wrapper around the control, and compiled under VC6, SP5.
Does anyone have any clues?
Thanks in advance
Dan Hill
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Run per-method profiling on the application to determine which methods are using up the most CPU time. Also, try disabling the XP themes and run in classic mode to see if that is the problem (shouldn't be, but it never hurts to try).
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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