Re: Anyone with Boost::Graph experience? - C / C++ / MFC Discussion Boards

Re: error C2039

S. Senthil Kumar3-Jul-05 3:53

S. Senthil Kumar

3-Jul-05 3:53

Does this[^] help?

Regards
Senthil
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Re: error C2039

John R. Shaw3-Jul-05 7:19

John R. Shaw

3-Jul-05 7:19

Nope. But thanks for the stab! Big Grin | :-D

I am going to start undoing the last changes I made, before this error started happening. Sigh | :sigh:

Blast It, thats alot of work, but I'll find it.;)

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

ClassWizard Problem : Help Me

prateekduble2-Jul-05 12:25

prateekduble

2-Jul-05 12:25

Hello Everyone,
I have been trying to add methods through ClassWizard but Its saying that "Error while updating *****.h and *****.cpp file". The methods I am trying to add are like Onselchange(), Button Clicks like OnButton4() etc. I am unable to add any. I did try following measures to solve this issue but none helped:

1. Deleted .clw and .ncb files, then added all source files to create fresh ClassWizard.
2. Looked if any file is Read-only (but none was Read-Only).
3. I tried to manually add these methods by writing AFX handlers in header file and then implementation in CPP file. But that is also not working.

Please help me about what could be wrong, what can I do to get things right ?

Thanks in Advance....................

Regards,

-- Prateek

Re: ClassWizard Problem : Help Me

John R. Shaw2-Jul-05 16:51

John R. Shaw

2-Jul-05 16:51

I do not know what causes the problem, but it happen to me about 20 minutes ago (and many times in the past, in VC6).

Note: This solution assumes the class did not exist before exicuting the ClassWizard.

My solution:
1. Yes the ClassWizard complaned, but it still generated the file. So delete the ClassWizard generated class file from the workspace.
2. Close IDE.
3. Delete generated file.
4. Open IDE and run ClassWizard again.

Closing the IDE is important, since it is in a slightly unstable state; if it wasn't, it would have been able to update the file it just generated.

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Re: ClassWizard Problem : Help Me

prateekduble2-Jul-05 19:13

prateekduble

2-Jul-05 19:13

Hi,
I think it has something to do with Default Read-Only setting of Windows XP Professional folders. What do you think ?

Regards
--Prateek

Re: ClassWizard Problem : Help Me

John R. Shaw2-Jul-05 20:46

John R. Shaw

2-Jul-05 20:46

What do I think?
I think you're wrong (but, I could be wrong).

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Anyone with Boost::Graph experience?

Nathan Addy2-Jul-05 9:35

Nathan Addy

2-Jul-05 9:35

Hey everyone,
I need a map class to represent the data in a sort of network class I'm making and I've been looking at Boost graph library for this. The one feature I really need is the ability to join two graphs together, by specifying a vetex from each that should be joined with an edge. Although Boost::mutable_graph looks close to what I want, I don't see how I can implement my join/union/addition operation in an efficient manner with the boost graph operations. Does anyone have experience with this problem and know of any potential solutions for it? Any suggestions for libraries that might work? I am going to check out the Graph Template Library and see if that might support this better. I could always make a graph structure that is optimized for my operation, but that would probably take more time than just finding something preexisting that just works.

Any suggestions?

Re: Anyone with Boost::Graph experience?

John R. Shaw2-Jul-05 18:03

John R. Shaw

2-Jul-05 18:03

A rough guess:
map1[0,1] = ?
map1[0,2] = ?
...

map2[0,1] = ?
map2[0,2] = ?
...

join(map1,map2);

new_map1[0,1] = ?
new_map1[0,2] = ?
...

Possible Solution:

void shift_keys(map_type& map, map_type::size_type amt)
{
    // create new map with adjusted keys
    map_type new_map(map);
    map_type::iterator mi = map.begin();
    for( ; mi != map.end(); ++mi )
       new_map[std:make_pair((mi->first).first+amt,(mi->first).second+amt)]
           = mi->second;
    map.swap(new_map);
}
vod join(map_type& map1,map_type& map2)
{
    map_type new_map(map2)
    shift_keys(map2,map1.size());
    // join new_map to map1
    map_type::iterator mi = new_map.begin();
    for( ; mi != new_map.end(); ++mi )
       map1[mi->first] = mi->second;
}

This is an incomplete solution (off the top of my head). It should successfully join the two maps.

Example:
join(map1,map2);
map1[0,1] = ?
map1[0,2] = ?
..
map1[2,3] = ?
map1[2,4] = ?
...

I hope that helps you figure out the problem. Maps allow only one entry per-key; therefore, you have to change any key values in map2 that may be the same as a key values in map1 before you attempt to join them.

It may be more complicated than that, but I have essentially used simular code to join two maps.

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Dynamic Buttons

Ger Hayden2-Jul-05 8:53

Ger Hayden

2-Jul-05 8:53

I want to create command buttons dynamically in an dialog based application - is this possible?

Ger

Re: Dynamic Buttons

PJ Arends2-Jul-05 9:30

PJ Arends

2-Jul-05 9:30

Ger Hayden wrote:
is this possible?

Yes, Just make sure the ID's you assign the buttons are within a certain range and use the ON_CONTROL_RANGE macro to map your buttons to a handler function.

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore/html/_core_Handlers_for_Message.2d.Map_Ranges.asp[^]

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" - mYkel - 21 Jun '04

"There's not enough blatant self-congratulatory backslapping in the world today..." - HumblePie - 21 Jun '05

Within you lies the power for good - Use it!

Blinking Button?

DanYELL2-Jul-05 6:30

DanYELL

2-Jul-05 6:30

I have a button in an application. The user has to click that
button first to pop up a dialog box and get started. So I have
the text on the button that says 'Click here first'. But people
dont see the button.

So I made the button a hover button, so that it looks hot when
you hover over. But people still miss the magic button.

My question is, is there a way to make a button blink alittle
(not alot so that its annoying)? Just a light blink on occasion
to catch the user's eye.

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

Sincerely,
Danielle Brina (an overworked graduate student)

Re: Blinking Button?

Trollslayer2-Jul-05 6:49

Trollslayer

2-Jul-05 6:49

Start a timer (see CWnd::SetTimer) with handler value of NULL and create a message handler for WM_TIMER, you can do the colour control etc. there.

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Re: Blinking Button?

toxcct2-Jul-05 7:20

toxcct

2-Jul-05 7:20

using SetTimer() is the right manner to set a blinking effect.

but can i suggest you to disable the other buttons if only this one should be clicked ???

TOXCCT >>> GEII power
[toxcct][VisualCalc]

Re: Blinking Button?

Michael Dunn3-Jul-05 10:26

Michael Dunn

3-Jul-05 10:26

Rule #1 of UI: Users don't read. Wink | ;)

If the only way to start is to click the button, why do you make the user click it? Just start whatever it is the app does.

--Mike--
Visual C++ MVP Cool | :cool:

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TCHAR error?

Larsson2-Jul-05 6:09

Larsson

2-Jul-05 6:09

What is wrong with this?, how can I use this to make it work?

CString sDriveLetter= (TCHAR) (i + ('A'));

This is the error I get;

cannot convert from 'TCHAR' to 'ATL::CStringT<basetype,stringtraits>'

Re: TCHAR error?

PJ Arends2-Jul-05 9:38

PJ Arends

2-Jul-05 9:38

What is the error number (C####) that the compiler gave you? If you look up that error number in MSDN you can usually figure out what the problem is by reading the explanation provided.

Re: TCHAR error?

Tom Archer2-Jul-05 9:39

Tom Archer

2-Jul-05 9:39

CString sDriveLetter;
sDriveLetter.Format("%c", (TCHAR) (i + ('A')));

Tom Archer
Visual C++ MVP

Re: TCHAR error?

John R. Shaw2-Jul-05 18:19

John R. Shaw

2-Jul-05 18:19

Unless MFC CString class varies from STL, that would be Illegal.

CString sDraveLetter = _T('A'); // illegal

CString sDraveLetter = _T("A"); // ok

CString sDraveLetter;
sDraveLetter = TCHAR(i+_T('A')); // ok

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Threading

Umair Ahmad khan2-Jul-05 0:53

Umair Ahmad khan

2-Jul-05 0:53

I am having a little problem handling Threads. Problem is, there is a Thread that i want to Terminate when Destructor of a Class called. Thread function is Using some functions of that class. I have done bit reading on Threading(still learning concepts etc) and about terminating a thread the way i want to use is AfxEndThread. it must be called within the thread that has to be terminated. or can it be called outside that thread also. or is there any way to terminate that thread from outside by some other thread.

<br />
pThread = AfxBeginThread(run,&nCount,THREAD_PRIORITY_NORMAL, 0, CREATE_SUSPENDED);<br />
	pThread->m_bAutoDelete=false;<br />
	pThread->ResumeThread();

thats how i am initializing the Thread. Now what if i just delete pThread object will this terminate the thread.
**************************
bit more detail...
above code is placed in the constructor of same class .. now another class when makes object of this class thread should start working and when it delets the object thread must also be end. I am getting some assertion error while some where in terminating the thread. and don't know where

Re: Threading

Umair Ahmad khan2-Jul-05 1:02

Umair Ahmad khan

2-Jul-05 1:02

well the Error I am getting is
Debug Assertion Failed.
File: WinCore.cpp
Line: 1002

well is this problem of my thread. :s

Re: Threading

meinhard_risch2-Jul-05 6:59

meinhard_risch

2-Jul-05 6:59

Hallo, I had a simmilar problem and I solved the problem by using a shared bool var. if the var is set to true from outside the thread terminats its self. Try to use it.

Meinhard

Re: Threading

Umair Ahmad khan2-Jul-05 10:41

Umair Ahmad khan

2-Jul-05 10:41

thanks for your reply well my problem solved the problem was i was trying to access a class function when there was no class object .. i mean with empty pointer Big Grin | :-D

.. and there was one more problem that if i start the thread again before it ends up or the class object is destroyed this create problem because thread is still using the class and class object was deleted .. so i make 2 boolean when destructor call comes one goes to false and destructor goes in an empty loop and this false boolean tell thread ok end now. before thread ends it false the other one too .. to tell destructor ok i m finish now .. so destructor comes out of loop and object destroy. it is something like syncronization .. or what ever Smile | :)

but problem is solved

Re: Threading

David Crow2-Jul-05 12:12

David Crow

2-Jul-05 12:12

See http://flounder.com/workerthreads.htm for how to properly shutdown a thread.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

how to read the header row in excel file?

qqworm2-Jul-05 0:37

qqworm

2-Jul-05 0:37

I am working on an application, in which I need to transfer the data from excel file to the access. but I don't know how to read the header row in excel file, for help, with thanks.

qqwom

Folder Synchronization

M.Mehrdad.M1-Jul-05 22:47

M.Mehrdad.M

1-Jul-05 22:47

Hi, There
I have Problem with the right way that i can Sync. Files
in two folders. i.e. when a file added in one ,a copy will add in other folder.
Folders are in Two compuer Connected with
LAN,
Is there any Sevice, Program, utility, Source code For
This?
Thanks.

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