Re: Constructors and (...) - C / C++ / MFC Discussion Boards

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Re: Help CList or? I'm lost.

Christian Graus6-Oct-01 13:13

Christian Graus

6-Oct-01 13:13

MSDN does not provide much good STL info. You can step through a map using iterators, like this:

map<CString, int>::iterator it = m_MyMap.begin();
for (;it != m_MyMp.end(), ++it)
{
    CString s = it->first();
    // Do what you want with it.  The int is it->second, if you need it
}

Christian

As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet.

Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery.

Re: Help CList or? I'm lost.

Jay Beckert6-Oct-01 13:26

Jay Beckert

6-Oct-01 13:26

Thank you Christian! Just ran into it searching through yahoo also.

Re: Help CList or? I'm lost.

Jay Beckert9-Oct-01 15:25

Jay Beckert

9-Oct-01 15:25

Don't know why I thought about STL before. I'm loading the whole file into memory and searching for each occurance of a few key words on each access. One thing I found is that you can use a map of vectors, list, etc. which seems alot better, faster and easier.

ATL I'm still lost.

Re: Help CList or? I'm lost.

Christian Graus9-Oct-01 15:37

Christian Graus

9-Oct-01 15:37

For ATL I ended up so stuck I bought 'Teach yourself ATL in 24 hours'. Once I read that I had the basics I needed to tackle ATL Internals. Just stick with it, I also read for months when I had no time to play with code, and eventually it all gelled.

Christian

As I learn the innermost secrets of the around me, they reward me in many ways to keep quiet.

Men with pierced ears are better prepared for marriage. They've experienced pain and bought Jewellery.

Property list like visual studio??

mhowes2-Oct-01 12:31

mhowes

2-Oct-01 12:31

I'd need to create a Property list, like that in Visual Studio for C++ and VB...
You all know the Properties window that is basically a two column grid but that lets you set properties on controls and the like.

Has anyone written a class (or is there one?) for and MFC app that will show up in a dockable window?

I don't need a property sheet...which is all I can seem to find...

I actually need something EXACTLY like the one in Visual Studio

ideas?
thanks
mike

Re: Property list like visual studio??

Bret Faller2-Oct-01 13:21

Bret Faller

2-Oct-01 13:21

Look in the List Control section here on CodeProject, I was just there.

Bret Faller
Odyssey Computing, Inc.

Constructors and (...)

Sprudling2-Oct-01 11:39

Sprudling

2-Oct-01 11:39

I have got a template class. It's called ObArray and one of the datamembers are a pointer to an array of any type of object. At the moment ObArray is just constructing all the objects using the default constructor.

But I always want to have the option to use another constructor to initialize the objects, not just the default one. I want this because it's faster than first creating the objects using te deafult constructor, and then change all the objects. Another reason is that not all classes even have a default constructor, which makes it impossible to create an array of instances of those classes.

The only way I can imagine this to be solves is by sending the constructin info along with the constructing of the array object (ObArray). Since constructors of course take a variable number of arguments, the constructor of ObArray must accept that too.

Like 'ObArray<t>::ObArray(int initLen, ...)', and then this constructor sends the arguments along to the constructor of each of the objects. Is this possible in any way?

Sprudling

Re: Constructors and (...)

Tomasz Sowinski2-Oct-01 11:59

Tomasz Sowinski

2-Oct-01 11:59

Like 'ObArray::ObArray(int initLen, ...)', and then this constructor sends the arguments along to the constructor of each of the objects. Is this possible in any way?

No. Use placement new instead.

Tomasz Sowinski -- http://www.shooltz.com

Re: Constructors and (...)

Sprudling2-Oct-01 12:58

Sprudling

2-Oct-01 12:58

Uhm... I don't really understand what you mean.

I know I can't actually write 'ObArray::ObArray(int initLen, ...)'. I just meant that this constructor could take arguments like that, and pass them on...

Btw... I think I found some sort of solution by using copy constructors, but that requires that the class I want to create the array of has one.

Another solution not requiring that will be better.

Sprudling

Re: Constructors and (...)

Tomasz Sowinski2-Oct-01 23:36

Tomasz Sowinski

2-Oct-01 23:36

I mean that you should allocate raw memory for all objects first using ::operator new or malloc. Constructors are not called in this phase. You use placement new next to initialize objects in allocated memory. The only problem left is that different classes you're going to put into ObArray may need different number of constructor parameters - you can solve this by providing multiple ObArray constructors, each having different number of params. Assuming that there are max 3 parameters that you need to pass, declaration of ObArray should begin like this:

template <typename T, 
typename P1 = void, 
typename P2 = void,
typename P3 = void>
class ObArray
{
// four constructors should go here
// one accepting only number of objects and no params
// and one for 1,2,3 params
};

Of course, you can generalize this to use more than 3 parameters in the c'tor.

Tomasz Sowinski -- http://www.shooltz.com

Convert Integer to LPSTR

2-Oct-01 11:14

Hi...

How can I convert an Integer to LPSTR

here is what I want:
TextOut(hdc, 20, 20, Integer, 5); Smile | :)

Re: Convert Integer to LPSTR

Carlos Antollini2-Oct-01 11:41

Carlos Antollini

2-Oct-01 11:41

With itoa(nVal, buff, 10);

Where buff is a LPSTR and nVal is a Integer.

Cheers!!!!

Carlos Antollini.

Thank you!

2-Oct-01 11:59

Thank you!

Is it even possible to create a multiline CListCtrl in report mode?

DanYELL2-Oct-01 11:11

DanYELL

2-Oct-01 11:11

I looked everywhere and tried alot of different things, but I can't
find any code that will help me create a multiline CListCtrl in
report mode. Any ideas? Any suggetsions? Any code?

Any response any one can give me will be greatly appreciated.

Sincerely,
Danielle (an overworked graduate student)

Re: Is it even possible to create a multiline CListCtrl in report mode?

Bret Faller2-Oct-01 13:20

Bret Faller

2-Oct-01 13:20

Its possible.

http://www.codeguru.com/listview/ReportCtrl.shtml

Bret Faller
Odyssey Computing, Inc.

Re: Is it even possible to create a multiline CListCtrl in report mode?

DanYELL3-Oct-01 3:29

DanYELL

3-Oct-01 3:29

I sincerely appreciate the reply.

I looked at that demo project and its spectacular, but really different
understand. By chance, do you have a smaller project that isolates the multiple text for one item feature? Or could you help me create it?

I have a CListCtrl and one of my columns has lots and lots of text. Horizontal scrolling to the right is just not doing it. But if I could make the text go to a new line within that same item, then the user could read the CListCtrl clearly.

Please, please any response you can give me will be greatly appreciated.

Sincerely,
Danielle (an overworked graduate student)

Here's a stumper - 'fixing' text selection

Jason Hihn2-Oct-01 11:03

Jason Hihn

2-Oct-01 11:03

While not exactly a programming question, I'd like to know if you can turn off auto-word selection.
What I'm talking about is when you're programming and trying to select text and it will back-up the start and/or finish to whereever it thinks is appropriate. "Word selection" I think they call it. Can I disable this system-wide?

Thanks

read a single line from textfile

2-Oct-01 9:47

Hi
how can I read a single line from a text-file?
There should be read in so much characters until there is a carriage-return/line-feed.

How to do this?

Re: read a single line from textfile

C^hris L^osinger2-Oct-01 9:49

C^hris L^osinger

2-Oct-01 9:49

CFile::ReadString, fread, etc..

try the MSDN. search for "read a line from a file"

-c

------------------------------
Smaller Animals Software, Inc.
http://www.smalleranimals.com

Thanks!!

2-Oct-01 10:02

ReadString works fine Smile | :)

Thanks!

Re: read a single line from textfile

Peter Molnar2-Oct-01 10:45

Peter Molnar

2-Oct-01 10:45

There is a simple (and fast) solution for this in C

#include "stdio.h"

FILE *filepointer;
char line[100];
char *kar;
fp1 = fopen("yourfilenamewithpath", "r");
kar = fgets(line, 100, filepointer); //read one line
//kar = fscanf(p, "%s", word); reads just one word until next space
//kar = getc(filepointer); reads just one character
printf("%s", line);
fclose(filepointer);

Bunburry

Education is an admirable thing but it is well to remember from time to time that nothing that is worth knowing can be taught (O.Wilde)

Output window of Visual C++

Peter Molnar2-Oct-01 9:28

Peter Molnar

2-Oct-01 9:28

Sirs,

do you have an idea how to create a view like the output window of Visual C++ with white tabs and client area to write on? Roll eyes | :rolleyes:

Thank you for your kind help.

Bunburry

Education is an admirable thing but it is well to remember from time to time that nothing that is worth knowing can be taught (O.Wilde)

Re: Output window of Visual C++

Carlos Antollini2-Oct-01 9:30

Carlos Antollini

2-Oct-01 9:30

See into BCG control, you can find it into CodeProject

Cheers!!!

Carlos Antollini.

Create Dll in VC++ for client that works in Delphi

2-Oct-01 9:13

Delphi can not use my lib file so how can I provide dll that I wrote in vc++ to client that works in Delphi ????

My dll exporting c style functions that use in objects of c++ {classes).
So what can I do if I want to give this dll for Delphi ???

Confused | :confused:

Re: Create Dll in VC++ for client that works in Delphi

C^hris L^osinger2-Oct-01 9:48

C^hris L^osinger

2-Oct-01 9:48

non-MFC clients can only use plain C functions from DLLs. or, you could write it as a COM module. you cannot export C++ functions to non-C++ clients.

-c

------------------------------
Smaller Animals Software, Inc.
http://www.smalleranimals.com

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