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OnSize is called at initialization.
You can prevent your OnSize handler code from executing the first time by using a bool variable that is set to false in the class constructor. And at the end of OnInitDialog(), you set it to true. And check if it is true in OnSize(), and if it is true, only then call MoveWindow() or whatever you want to do in OnSize().
this is this.
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Hi,
check out the OnGetMinMaxInfo() handler.
In the class-wizard it's a window message not a dialog message.
Regards
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sayup wrote:
using the OnSize handler i want to set the size of dialog box myself.
I think you'd be better off handling WM_SYSCOMMAND and resizing the window to the desired size for the SC_MAXIMIZE case.
/ravi
My new year's resolution: 2048 x 1536
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ravib(at)ravib(dot)com
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Is this from experience? The MINMAXINFO Structure definitely has a field for entering the MAXIMUM size of the window, so why wouldn't filling that in be enough?
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Blake Miller wrote:
Is this from experience?
Yes, but handling WM_GETMINMAXINFO should also work.
/ravi
My new year's resolution: 2048 x 1536
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com
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Ravi Bhavnani wrote:
Yes, but handling WM_GETMINMAXINFO should also work
According to the documentation for the WM_GETMINMAXINFO Notification[^]:
"The maximum tracking size is the largest window size that can be produced by using the borders to size the window. The minimum tracking size is the smallest window size that can be produced by using the borders to size the window."
It seems to be used for manual resize tracking. I'm not sure it's also used while maximizing/minimizing the window, but I suspect it isn't. If anyone tries it, please let us know 
--
jlr
http://jlamas.blogspot.com/[^]
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Hi,
I want to develop GUI-based plugin for Win32 IDE. I want to add a menu item to VC++ IDE. I m a beginner in COM & ATL programming, but I suppose I can use COM & ATL to create GUI plugin for VC++ editor. Please suggest/help/direct/guide me for same?
-Manish
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class Integer {
int i;
public:
Integer(int ii) : i(ii) {}
const Integer operator+(const Integer& rv) const
{
cout << "operator+" << endl;
return Integer(i + rv.i);
}
};
Regarding the codes above what's the difference between
...
return Integer(i + rv.i);
...
and
...
Interger a(i + rv.i);
return a;
...
In addition in what context should one of these syntax be used?
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the only difference remains in the fact that in first last sample, you create a temporary variable, which only exists to return its content.
it is so avoided if you want to optimize your code.
the only way it could be useful is when debugging, by setting a breakpoint at this point, you can control how the temporary variable is created.
that's all.
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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I modified the forward example a lit bit. In which constructor, copy-constructor and destructor announce themselves!
...
Interger a(i + rv.i);
return a;
...
Its output was
constructor -> copy-constructor(cuz return by value) -> destructor(local object goes out of scope) -> destructor(temp object generated by compiler which was to hold returned object got destructed)
...
return Integer(i + rv.i);
...
Its output was
constructor -> destructor
I pretty clear with the former's process and obviously it has a much more overhead compare to the latter, but I wonder since there's no CC calling in the former, how can I get the returned value?What exactly the process the former is taking???
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In the first case, the compiler creates a temporary object on the stack (in the function, object a). You return this object by value, so the compiler creates another temporary object on the stack (the return value) and then calls the copy constructor to copy object a into the temporary object. Than, object a gets destroyed and after finishing the statement, the temporary return value gets destroyed also.
In the second case, you introduce no temoray variable in the function itself. You call the contructor to return the value. In this case, the destructor of the returned temporary variable is called.
Behind every great black man...
... is the police. - Conspiracy brother
Blog[^]
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Bob Stanneveld wrote:
In the second case, you introduce no temoray variable in the function itself.
in fact, it is done implicitely, but a tempoary object is still created...
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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by making return Integer(i + rv.i); the compiler creates a temporary object which is initalized by its constructor (called here with the parameter i + rv.i).
then, by executing return the program exits the local scope of the function and so calls the destructors of the local variables...
nothing more, nothing less.
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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Actually, there is no real diference. Do whatever is clearer to you....
Any decent compiler is intelligent enough to optimise away the temporary variables. The compiler does a much better job at low-level optimisation than any programmer, I usually leave this job to it and keep the code the clearest for me.
My 2 cents..
Guy
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no real difference. But depending on the return type of the function, the second bit of code could create another temporary.
For instance:
int function()<br />
{<br />
return Integer(i + rv.i);<br />
}
and
int function()<br />
{<br />
Integer a(i + rv.i);<br />
return a;<br />
}
will both create a temporary object (even 'a' could be considered temporary) and return the encapsulated int value.
While
Integer function()<br />
{<br />
return Integer(i + rv.i);<br />
}
and
Integer function()<br />
{<br />
Integer a(i + rv.i);<br />
return a;<br />
}
Will both create TWO temporary objects, one inside the function, and one as the return value.
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Anonymous wrote:
dfgdfgdf
Are you learning ABCD......
"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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Yes, you ARE a moron. Next...
Christian Graus - Microsoft MVP - C++
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very funny 
V
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My problem is that i need to do some addition, subtraction, and multiplication on a number and then display the result in a textbox or label or something like that so that it is displayed in the window. I have been trying to find how to convert from an int to a system::string (if it is even possible) but could not find anything. Am i going about this wrong just cannot figure out how to do it correctly. I am using microsoft visual c++ express edition 2005 beta 2.
I have tried searching the web for anything like this and could not find anything that would work. I have been working on this for over a week now and connot figure it out. I am new to programming so it is probably pretty simple but i cant find any help on this. Any help that anyone could offer would be greatly appreciated.
-Kyle
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system::string means you're using managed C++, not normal C++ ? system::string has a Format method to do what you want. If you were using C++, then istringstream or *shudder* sprintf would convert int to string, or CString::Format ( from memory ).
Christian Graus - Microsoft MVP - C++
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i am using managed c++. if you could include a sample code of how to use the System::String Format function it would help out greatly. i looked at it but it asked for a System::String and a System::Object what would i put for the each and where does the int variable go?
if i use a textbox named txt and an int variable named num, would it be:
txt->Text->Format(txt->Text, num);
is this right or am i way off??
thank you for the help.
-Kyle
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The system::string is the format string, and the object is the object to format. You can pass in as many objects as you like, they are numbered from 0.
txt->Text = System::String::Format("{0}", num);
Christian Graus - Microsoft MVP - C++
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I tried that a few different ways some ways compiled but did not do what i wanted it to and the way that was posted gives me the following error:
error C2664: 'System::String ^System::String::Format(System::String ^,System::Object ^)' : cannot convert parameter 1 from 'int' to 'System::String ^'<br />
1> No user-defined-conversion operator available, or<br />
1> No standard conversion exists from the boxed form of the arithmetic type to the target type
and would not compile.
i searched the web and found the stringbuilder class and was wondering if this would do what i wanted it to.
- Kyle
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