User specified inheritance - C / C++ / MFC Discussion Boards

W∴ Balboos, GHB4-Aug-10 4:42

4-Aug-10 4:42

Using it is so easy I can do it with my eyes closed . . . and that is my recommendation to you.

If that's not working out well, you can also turn off your monitor.

/xml>

"The difference between genius and stupidity is that genius has its limits." - Albert Einstein

"As far as we know, our computer has never had an undetected error." - Weisert

"If you are searching for perfection in others, then you seek dissappointment. If you are searching for perfection in yourself, then you seek failure." - Balboos HaGadol Mar 2010

Let me help..any one please

krishna.p.vuppala26-Jul-10 8:51

krishna.p.vuppala

26-Jul-10 8:51

I installed Visual C++ 2010 Expression Edition in my notebook(its HP..with

Winodows 7)..after creating a sample Windows forms application..i am not

getting output Dialog box..apart from this the application build successfully..

later i tried with VC++ 2010 Professional(30 days Trail version)..

here also i faced the same issue...

is there any problem with OS..previously i worked on VC++ 6.0.

awaiting for the responce Sniff | :^)

Re: Let me help..any one please

Richard MacCutchan26-Jul-10 9:05

Richard MacCutchan

26-Jul-10 9:05

krishna.p.vuppala wrote:
I installed Visual C++ 2010 Expression Edition in my notebook(its HP..with Winodows 7

I use the same configuration on a Dell laptop and it works fine. It is likely that something in your code is not correct. Can you show an extract of the code where the dialog should be displayed?

It's time for a new signature.

Re: Let me help..any one please

Yusuf26-Jul-10 12:43

Yusuf

26-Jul-10 12:43

How are you trying to run it? If you are using keyboard shortcuts, there have been some changes since VC++. Did you click on the run icon or use F5? May be you are only building it not running it. Unsure | :~

Yusuf
May I help you?

Re: Let me help..any one please

krishna.p.vuppala26-Jul-10 16:47

krishna.p.vuppala

26-Jul-10 16:47

Thanks for your valuable comments..

it's works well...but in VC++ 6.0 after building the solution

dialog will come automatically(i hope soo..because i worked on it

5 years back)...in Visual Studio 2010 prof.Edition i got it

after clicking START WITHOUT DEBUGGING..From DEBUG Menu(After

Successfully Building the Solution)

Please let me know any other possible solutions... Smile | :)

please refer me some links, that describes the diff between VC++ 6.0 and VisualC++ 2010

Re: Let me help..any one please

Yusuf27-Jul-10 4:03

Yusuf

27-Jul-10 4:03

krishna.p.vuppala wrote:
please refer me some links, that describes the diff between VC++ 6.0 and VisualC++ 2010

There have been lots of changes since 6.0, see this[^] then google for what is new VC++ <insert version here>

Yusuf
May I help you?

Re: Let me help..any one please

patbob27-Jul-10 6:10

patbob

27-Jul-10 6:10

In VC++ 6.0, you could compile or run the program. If you attempted to run the program, you could configure VC++6.0 to first compile anything out of date, then if successful, run the program. I believe this was the befault behavior. Could that have been how you were using it?

I believe VS2010 will have the same behaviors (we're only up to VS2008), and probably installs pre-configured that way. The shortcut keys will all have changed, so use the menus or the toolbar icons.

patbob

User specified inheritance

John R. Shaw26-Jul-10 6:47

John R. Shaw

26-Jul-10 6:47

I am reworking a template library that is VC++6.0 compatible, but I do not have access to that compiler at the moment.

Will the following test successfully compile and run on VC++6.0?

// JRS - 7.25.2010 - Test user specified inheritance
#include <cstdlib>
#include <iostream>

using namespace std;

template<typename CharT>
struct A
{
	CharT ch;
	A() : ch('A') {}
};

template<typename CharT, typename BaseT = A<CharT> >
struct B : public BaseT // user specified inheritance
{
	B() { BaseT::ch = 'B'; }
};

int main(int argc, char* argv[])
{
	A<char> a;
	B<char> b;

	cout << "a.ch = " << a.ch << endl;
	cout << "b.ch = " << b.ch << endl;

	system("PAUSE");
	return 0;
}

Curious?

I have 3 class templates that all have a “has-a” relationship with a data storage class template and I am changing it to an “is-a” relationship. But I still want the user to be able specify the storage class, as there are legitimate reasons why they may want to.

The above method solves the problem, but I have never seen it used by anyone else.

INTP
"Program testing can be used to show the presence of bugs, but never to show their absence." - Edsger Dijkstra
"I have never been lost, but I will admit to being confused for several weeks. " - Daniel Boone

Re: User specified inheritance

David Crow26-Jul-10 7:32

David Crow

26-Jul-10 7:32

John R. Shaw wrote:
Will the following test successfully compile...on VC++6.0?

Yes.

"One man's wage rise is another man's price increase." - Harold Wilson

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"Man who follows car will be exhausted." - Confucius

Re: User specified inheritance

John R. Shaw26-Jul-10 7:50

John R. Shaw

26-Jul-10 7:50

Thanks!

(MFC Feature Pack) CMFCPropertyGridFileProperty question

Maximilien26-Jul-10 5:23

Maximilien

26-Jul-10 5:23

Is there a way to customize the look of the CMFCPropertyGridFileProperty ?

In particular have that "browse" button always visible ?

Now, the button is only visible when the property gets the focus.

Not that important ...

Max.

Watched code never compiles.

Re: (MFC Feature Pack) CMFCPropertyGridFileProperty question

Eugen Podsypalnikov26-Jul-10 7:58

Eugen Podsypalnikov

26-Jul-10 7:58

You could extend the
virtual void CMFCPropertyGridProperty::OnDrawButton(CDC* pDC, CRect rect)
in your own class, derived from CMFCPropertyGridFileProperty Smile | :)

virtual void BeHappy() = 0;

Re: (MFC Feature Pack) CMFCPropertyGridFileProperty question

Maximilien26-Jul-10 10:07

Maximilien

26-Jul-10 10:07

Eugen Podsypalnikov wrote:
You could extend the

Yeah, tried that, but the button is only visible when the property gets the focus and the underlying code checks the button rectangle (which is set/unset) depending on the focus (I think, still looking); and I would need to override a couple of methods in CMFCPropertyGridCtrl and I don't want to go there right now ( not enough time).

At least there is some source code to look at.

Thanks.

Watched code never compiles.

delete Syntax

T.RATHA KRISHNAN26-Jul-10 2:13

T.RATHA KRISHNAN

26-Jul-10 2:13

Hi!
How to delete the following?

irr::core::array<irr::gui::IGUIButton*> m_pPlayerBtn;

Re: delete Syntax

Cedric Moonen26-Jul-10 2:17

Cedric Moonen

26-Jul-10 2:17

Depends a lot how the buttons in the array are allocated. Did you allocate the IGUIButton dynamically (with new) ? If yes, then you need to iterate over the array and delete each element separately.

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: delete Syntax

T.RATHA KRISHNAN26-Jul-10 2:22

T.RATHA KRISHNAN

26-Jul-10 2:22

Hi!
I've not used

new

. It's initialized like this:

for(u32 i = 0; i < 11;i++)
 {
  m_pPlayerBtn.push_back(pManager->getGUIEnvironment()->addButton(rect<s32>(uright_x, uright_y, lleft_x+75, lleft_y+5), 0, id_btn++, 0, 0));  
  uright_y+=25;
  lleft_y+=25;
 }

How to delete this m_pPlayerBtn?

Re: delete Syntax

Cedric Moonen26-Jul-10 2:29

Cedric Moonen

26-Jul-10 2:29

What does the documentation say about addButton ? I guess they are managed internally by the library so you probably don't have to do anything. Check the doc of the library, it's impossible to give you a clear answer without looking at the documenation of the library.
Anyway, from what I see here I would guess that you don't have to do anything (but it's just a guess).

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: delete Syntax

Maximilien26-Jul-10 2:31

Maximilien

26-Jul-10 2:31

what does the documentation of "addButton" says ?

can I assume it returns a pointer to a button ? if yes that you need to delete each button individually when cleaning the m_pPlayerBtn list/array/whatever.

Watched code never compiles.

Re: delete Syntax

Cedric Moonen26-Jul-10 2:38

Cedric Moonen

26-Jul-10 2:38

Maximilien wrote:
if yes that you need to delete each button individually when cleaning the m_pPlayerBtn list/array/whatever.

I would guess that the "GUI environment" (returned by the call to getGUIEnvironment() ) would manage the lifetime of the several buttons. The pointer returned by addButton would be used only if you need to manipulate the button later.

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: delete Syntax

Aescleal26-Jul-10 2:24

Aescleal

26-Jul-10 2:24

That really depends on the implementation of irr::core::array. If it's just a fairly dumb container you're going to have to manually iterate over the collection and delete each element in turn. On the other hand if it's a class designed for resource management then it might delete stuff for you. You're going to have to look at the docs and see.

Oh, and of course there's the possibility that the array might just contain references to objects that are managed elsewhwere. In that case you don't want to delete the elements of the array.

Cheers,

Ash

How to create Multiple instance of Simple Windows Services? [modified]

Game-point26-Jul-10 1:21

Game-point

26-Jul-10 1:21

Hi All

I need to create Multiple instance of Windows Service ,how its possible?

Thanks

Raju

Failure is Success If we learn from it!!

modified on Monday, July 26, 2010 7:30 AM

Re: How to create Multiple instance of Simple Windows Services?

norish26-Jul-10 3:51

norish

26-Jul-10 3:51

You can make the manager service which spawn multiple instance of some program.
If you mean multiple processes by multiple, the manger service is like below;

// define some structure for managing status.
struct MyProcInfo {
    BOOL                m_spawnSucceeded;
    PROCESS_INFORMATION m_processInfo;
} m_myProcInfo[N];

...
// execute and hold handles
    for (int j = 0; j < N; j++) {
       m_myProcInfo[j].m_spawnSucceeded = CreateProcess(SOME_PROGRAM, argsForIt, ...., &m_myProcInfo[j].m_processInfo);
    }

Or if you do not mean multiple processes but multiple COM instances, you can easily write like that service with ATL COM AppWizard wizard in visual studio.

Error while adding ON_BN_CLICKED event.

Deepu Antony25-Jul-10 23:26

Deepu Antony

25-Jul-10 23:26

Hi

I have a class MyClass, which is derived from CWnd and COleDropTarget.

class MyClass:public CWnd, public COleDropTarget
{
};

I am having a button in my class. While adding ON_BN_CLICKED(BUTTON_ID, OnClick) event in the message map entry, i am getting the following compiler error,

Error C2594: 'Static cast': ambigious convertion form 'void (__thiscall MyClass::*) (void)' to AFX_PMSG.

can anybody tell me what's the issue.

Thanks

Re: Error while adding ON_BN_CLICKED event.

ThatsAlok25-Jul-10 23:56

ThatsAlok

25-Jul-10 23:56

Deepu Antony wrote:
ON_BN_CLICKED(BUTTON_ID, OnClick)

change it to

ON_BN_CLICKED(BUTTON_ID, &MyClass::OnClick)

Also, signature of the function should be like this

void FunctionName();

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
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Re: Error while adding ON_BN_CLICKED event.

Deepu Antony26-Jul-10 0:07

Deepu Antony

26-Jul-10 0:07

Hi,

Still i am getting the same error. Frown | :(

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