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What about objects that call delete this; 
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Robert Edward Caldecott wrote: What about objects that call delete this;
ask the Objects
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
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Robert Edward Caldecott wrote: What about objects that call delete this;
Just yesterday I saw some code that was doing 'delete this'. Generally, I think we should stick away from doing this, but in the code that I was reading it fits in very well in the flow. So I think it is okay to use 'delete this' if you define the class and you yourselves use it, but it would be bad to use it in a library that will be used by someone else.
thanks!
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Chintoo723 wrote: Just yesterday I saw some code that was doing 'delete this'. Generally, I think we should stick away from doing this, but in the code that I was reading it fits in very well in the flow.
Are you referring to a modeless dialog?
"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli
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One place where I did this was about 6-8 years ago when doing custom "in-place" modification controls for a very customized ListView control. The control supported editable submitems using various controls (edit, combobox, color picker, other custom controls).
The controls were dynamically created with the coordinates and information of the subitem being modified and they would create the specific GUI control and take control of the edit operation. When done, they would send information on the edit to the ListView control and would then delete themselves via delete this. But it was my class and I knew exactly what it was doing.
It just made it simplier than maintaining the lifetime of the object in the ListView control. (Not saying it was right or wrong.)
Peace!
-=- James
If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
DeleteFXPFiles & CheckFavorites (Please rate this post!)
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Hello Friends,
My company has recently taken up a project on Remote Destop monitoring.
Can anybody help me rgd how to proceed in this project which is like VNC, destop controlling.
With Rgds
Girish
Software Developer
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Hello Girish !
I did the project in VB which was monitoring the remote machine(along with capturin the remote desktop, loggin off user and shuting down the remote machin). In orger to get the remote desktop you need to capture the desktop, save it into a file as an image and send that file over network and display it on a form(as i did in vb). The form should not have titlebar, or any of the border property. make the form size as of your screen resolution. so that it appears as if you'r lookin your own desktop. The user even will not come to know which desktop is open...
-Malli...!
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Malli_S wrote: In orger to get the remote desktop you need to capture the desktop, save it into a file as an image and send that file over network and display it on a form(as i did in vb).
this is very cumbersome task... and it will choked the whole netwrok if you start monitoring three and above computers.... better look for other alternative..
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
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Thanx very much for the Reply,Malli
Our Team is developing this in VC++ 6.0,
Anyway thanx very much for giving the overview of the things to get it started
Any more help if i can get than nothing like that
With Rgds
Girish
Software Developer
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The cycle i made should work for three times,
for the first time in the debug the "i" counter increses from zero to 1, as i see on the second time "i" counter doesn't increases!!! But it have to!
I can't understand...
Here is the code:
for(int i =0;i<ColumnsNumber;i++)<br />
{<br />
DBFColumn column;<br />
dbffile.read(column.FieldName,10);<br />
dbffile.read((char*)&column.caPad,sizeof(char));<br />
dbffile.read((char*)&column.cFieldType,sizeof(char));<br />
dbffile.read((char*)&column.lwhere,sizeof(int));<br />
dbffile.read((char*)&column.cFieldLength,sizeof(char));<br />
dbffile.read((char*)&column.cFieldPrecision,sizeof(char));<br />
dbffile.read((char*)&column.caPad3,14);<br />
<br />
<br />
<br />
SQLQuery+=(string)column.FieldName+"_dbf";<br />
switch(column.cFieldType)<br />
{<br />
case 'F':<br />
SQLQuery+=" float,";<br />
break;<br />
case 'N':<br />
{ <br />
if(column.cFieldLength==31||column.cFieldLength==12)<br />
SQLQuery+=" float,"; <br />
else<br />
if(column.cFieldLength==6)<br />
SQLQuery+=" smallint,";<br />
else<br />
SQLQuery+=" int,";<br />
break;<br />
}<br />
case 'L':<br />
{<br />
SQLQuery+=" bit,";<br />
break;<br />
}<br />
case 'D':<br />
{<br />
SQLQuery+=" datetime,";<br />
break;<br />
}<br />
case 'C':<br />
{<br />
char number[32];<br />
SQLQuery+=string(" VARCHAR (")+_itoa(column.cFieldLength+1,number,10)+"),";<br />
break;<br />
}<br />
};<br />
Columns.push_back(column);<br />
}
-- modified at 2:57 Wednesday 15th February, 2006
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How much is ColumnsNumber ?
~RaGE();
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The ComunsNuber is 3,
but my cycle runs more than 3 times, because the "i" counter doesn't increases!!!
I Can send you the solution in archive, give me you e-mail. And You'll see.
The solution is on visual studio 2005 professional
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is i declared somewhere else as global ? or do you have a scope clash ? Try and rename it.
~RaGE();
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Rassul Yunussov wrote: ...but my cycle runs more than 3 times...
How are you verifying this?
"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli
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well, shame on me. I found the problem...
I was reading the data to the pointer, that i didn't reserved in the memory. So i erased the memory where "i" was stored.
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Rassul Yunussov wrote: for(int i =0;i<ColumnsNumber;i++)
what is the value of ColumnsNumber
Owner drawn
Jesus Loves
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Did you check you ColumnsNumber. I think it would be 1.
-Malli...!
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The ComunsNuber is 3,
but my cycle runs more than 3 times, because the "i" counter doesn't increases!!!
I Can send you the solution in archive, give me you e-mail. And You'll see.
The solution is on visual studio 2005 professional
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I can't see anything in your code that would cause that problem. Are you sure the value of ColumnsNumber is what you expect?
Also, check to make sure your sizes in the dbffile.read() calls are correct - you might be encountering a memory smashing bug.
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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You do one thing, replace the variable 'i' with something else. Because that might be clashing.
-Malli...!
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Hi All,
How does one use cout to display hex characters?
For example a variable is set to 0x60, but when you call cout << var << endl; you get ' because that is 0x60 on the ASCII table.
regards,
Rich
"Programming today is a race between software engineers striving to build bigger and
better idiot-proof programs, and the Universe trying to produce bigger and better idiots.
So far the Universe is winning." -- Rich Cook
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The old fashion (C) way:
int i = 0x60;
printf("%02X", i); // prints "60"
printf("%04X", i); // prints "0060"
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Hi !
I put some sample code for your. You can make use of it, as per your need.
int n=20;
cout << "decimal: " << n << endl;
//--- Print hex with leading zeros
cout << "hex : ";
for (int i=2*sizeof(int) - 1; i>=0; i--)
{
cout << "0123456789ABCDEF"[((n >> i*4) & 0xF)];
cout << endl << endl;
}
-Malli...!
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Hi,
That is rather cute code!
Thanks,
Rich
"Programming today is a race between software engineers striving to build bigger and
better idiot-proof programs, and the Universe trying to produce bigger and better idiots.
So far the Universe is winning." -- Rich Cook
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Why not use:
cout << std::hex << var << endl;
"The greatest good you can do for another is not just to share your riches but to reveal to him his own." - Benjamin Disraeli
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