C / C++ / MFC

2-Apr-08 1:31

I'm currently working on a project where users create objects (as many as they like). The names of these objects are then used in a command prompt to select and then display their information. I can currently make as many objects as I like but using their names as the menu headings is proving to be difficult.
Here is an example of what I am after. Think of this as output with the numbers down the side refering to a number selection.

1.create new object
2.quit to main menu

Please choose one:

so a user selects 1 and creates a new object with the name "score". After creation the user is sent back to the main menu looking like this after the object is created

1.score
2.create new object
3.quit to main menu

If the user was to select score this would then bring up the object data somethiing as follows:

Name: Score
Score: 24
Modifier: 2

I know how to retrive only the name of the object and display it fine but using it as a selection as I said before is proving to be difficult. If anyone has any insight on something like this in c++ please reply

Thanks.

I'm coding this in c++.

Cedric Moonen2-Apr-08 2:12

2-Apr-08 2:12

It is very difficult to understand your problem, please keep in mind that we don't see your code, so we have no idea on how you implemented this.

Please provide some relevant code (and format it properly using the pre or code tags) and give some more detailed explanation by taking into account that need to understand what you are talking about.
What is an "object" in our case ? A class ? If yes, how does it look like ? And why can't you extract other information than the name Confused | :confused:

Cédric Moonen
Software developer

Charting control [v1.3]

Auchioane2-Apr-08 2:44

2-Apr-08 2:44

Sorry should have stated myself clearer. I can extract any of the data items from the created objects. The objects are instances of my designed class.

The class that im using is basicly with member functions taken out:

class thing
{
string name;
double price;
string desc;
}

I'm using vectors to store my objects since I'm only just learning to code in c++ and don't quite understand pointers but have experiance with other languages like modula2.

Cedric Moonen2-Apr-08 2:57

2-Apr-08 2:57

Ok, but what is the problem ?? You still didn't explain precisely where you are stuck. Please, try to be as clear as possible.

Cédric Moonen
Software developer

Charting control [v1.3]

Auchioane2-Apr-08 12:03

2-Apr-08 12:03

The problem I'm having is how do I code somthing thats going to be generated dynamiclly.

Static menus are simple:

<pre>cout << "1.Create new object"
<< "\n2.Quit to main menu"
<< "\n Please choose one: ";
cin >> choice;

if (choice == 1)
{
createObject();
runMenu(); //would be done recursivly if you get my drift
}
else if (choice == 2)
{
runMenu();
}
else
{
error();
}
</pre>

That I can hard code the different numbers to do different things, but since I don't know how many object the user will create I can't really hard code it. I hope that helps somewhat.

Cedric Moonen2-Apr-08 20:36

2-Apr-08 20:36

Ooookay, that makes finally a bit more sense Smile | :)

. So, as you said, your objects are stored in a vector and you would like to add a line in your 'menu' for each element, right ?

So, simply do something like this:

int menuIndex = 1;<br />
vector<MyObject>::iterator iter = m_vector.begin();<br />
for (iter; iter!=m_vector.end();iter++)<br />
{<br />
cout << menuIndex << ". Show details of element " << (*iter).name << endl;<br />
}<br />

And then, for the choices, you check if what the user entered is between 1 and m_vector.size(). If that's the case, then you can retrieve this element from the vector and display its content (m_vector[choice]).

Does it make more sense ?

Cédric Moonen
Software developer

Charting control [v1.3]

Maximilien2-Apr-08 2:48

Maximilien

2-Apr-08 2:48

You are wanting to do a simple "text interface".

Well, you need a lot of std::cout, std::cin, and a "state machne"

for example :

you have this menu ( I assume typing the number will "do" the action)

1.create new object
2.quit to main menu

user press "1" this will do the "create new object" action and print the same menu again (stays in the same state); user press "2" then the program goes to a new state) and print the "main menu" (for example )

1.score
2.create new object
3.quite to main menu

user press "1" to do the score state (or action).

'anyway, I hope you get the picture.

One suggestion, is to take a piece of paper, a pen and draw the different link (arrows) between each action and each "state" and after the "scenario" is drawn, try to put in in code. (lot of if, case, loops, ...

Maximilien Lincourt
Your Head A Splode - Strong Bad

Auchioane2-Apr-08 16:00

2-Apr-08 16:00

Don't worry guys / gals I managed to work it out.

Thanks for your help anyway.

CallStack checking?

RamaraoPV2-Apr-08 0:35

2-Apr-08 0:35

Hi,

I do not know how to test CallStack and debug can anyone tell me how to do it or can anyone provide any documents about it.

Thanks & Regards,
Ramarao. Rose | [Rose]

Re: CallStack checking?

Cedric Moonen2-Apr-08 0:57

Re:Thanks still i have the question?

2-Apr-08 0:57

Start your debugger (press F5), to see the callstack window go into (Debug/Windows/Call Stack) for VC2005. When your program crashed, you can check the callstack to see which of your function caused the problem. There you can put some breakpoints (F9) and go step by step to see what's happening. Hover your mouse over the different variables to see their values.

Cédric Moonen
Software developer

Charting control [v1.3]

RamaraoPV2-Apr-08 1:13

Re:Thanks still i have the question?

2-Apr-08 1:13

Thanks

I did it and i found that the problem comes when we call MessageBoxIndirect(). Everything is loading very well into MSGPARAMS, so what might causing the crash?

Regards,
Ramarao. Rose | [Rose]

Cedric Moonen2-Apr-08 2:14

2-Apr-08 2:14

Do you have an assertion message ? If yes, please provide the text because it is almost impossible to guess what might be wrong.

Cédric Moonen
Software developer

Charting control [v1.3]

Printer DC

Developer6112-Apr-08 0:22

Developer611

2-Apr-08 0:22

Hi there .

How can I get the printer DC ?

DMASTER

_AnsHUMAN_ 2-Apr-08 1:14

_AnsHUMAN_

2-Apr-08 1:14

See if you can use CPrintDialog::GetPrinterDC

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Developer6112-Apr-08 1:28

Developer611

2-Apr-08 1:28

Thanks to your reply.

I don't want to use MFC, I need a solution with windows API.

DMASTER

Rajkumar R2-Apr-08 1:51

Rajkumar R

2-Apr-08 1:51

Retrieving a Printer Device Context[^]

Creating a Printer Device Context[^]

Using the Print Property Sheet[^]

more[^]

Printing tips and tricks from the trenches (MFC)[^]

Rajkumar R2-Apr-08 1:19

Rajkumar R

2-Apr-08 1:19

Krishnakumartg3-Apr-08 21:37

Krishnakumartg

3-Apr-08 21:37

HDC hDC;
CDC PrinterDC;
hDC = CreateDC( NULL, "YOUR PRINTERNAME", NULL, NULL );
PrinterDC.Attach( hDC );
DOCINFO stDocInfo;
memset( &stDocInfo, 0, sizeof( DOCINFO ));
stDocInfo.cbSize = sizeof( DOCINFO );
stDocInfo.lpszDocName = _T( "TEST" ); // Document name
StartDoc( hDC, &stDocInfo );
CPen DrawPen( PS_DASH, 5, RGB( 0, 0, 0 ));
CBrush DrawBrush( HS_BDIAGONAL, RGB( 0, 0, 255 ));
PrinterDC.SelectObject( &DrawPen );
//PrinterDC.SelectObject( &DrawBrush ) ;
PrinterDC.SetBkMode( TRANSPARENT );
StartPage( hDC );
CRect Rect( 0, 0, 100, 100 );
PrinterDC.Rectangle( &Rect );
PrinterDC.MoveTo( 0, 0 );
PrinterDC.LineTo( 100, 100 );
CString csText( _T( "Orientation" ));
TextOut( hDC, 50, 50, csText.operator LPCTSTR(), csText.GetLength());
EndPage( hDC );
EndDoc( hDC );
PrinterDC.Detach();

How to get focus to property sheet in windows programming(win32)

Hamid_RT7-Apr-08 3:54

Hamid_RT

7-Apr-08 3:54

And see these examples:here[^] and here[^].

Swty2-Apr-08 0:15

Swty

2-Apr-08 0:15

I have Help button in property sheet,when i click on it the associated help gets invoke.Similarly when i click F1 it does the same.
When i do it both one after the other,the focus is no more when i try to press F1.

Can anyone help me out from this situation

Application is crashing when trying to display messagebox

RamaraoPV2-Apr-08 0:11

Re: Application is crashing when trying to display messagebox

2-Apr-08 0:11

Hi,
InitThunk((TMFP) &CExtBox::HookProc, this);
m_hHook = SetWindowsHookEx(WH_CBT, (HOOKPROC) GetThunk(), NULL,GetCurrentThreadId());
ASSERT(m_hHook);
nRes = MessageBoxIndirect(&mp);
if(m_hHook)
UnhookWindowsHookEx(m_hHook);

This is the code part i am using and it was crashing when it calls MessageBoxIndirect().

This code was running from a long time now in fresh version of release this is giving problem. If i use MessageBox( ) then it is working but the function that i am calling is used in somany places so i cannot avoid it.

It is giving the following Application error
Event Type: Error
Event Source: Application Error
Event Category: (100)
Event ID: 1000
Date: 3/13/2008
Time: 7:14:39 AM
User: N/A
Computer: SILT06-FERG
Description:
Faulting application Acp.exe, version 5.2.1002.21, faulting module unknown, version 0.0.0.0, fault address 0x01f5f968.
Data:
0000: 41 70 70 6c 69 63 61 74 Applicat
0008: 69 6f 6e 20 46 61 69 6c ion Fail
0010: 75 72 65 20 20 41 63 70 ure Acp
0018: 2e 65 78 65 20 35 2e 32 .exe 5.2
0020: 2e 31 30 30 32 2e 32 31 .1002.21
0028: 20 69 6e 20 75 6e 6b 6e in unkn
0030: 6f 77 6e 20 30 2e 30 2e own 0.0.
0038: 30 2e 30 20 61 74 20 6f 0.0 at o
0040: 66 66 73 65 74 20 30 31 ffset 01
0048: 66 35 66 39 36 38 f5f968

I do not know how to check the callstack so please suggest me, now what can i do? This is a customer issue i need a solution badly please help me.

Yes everything is fine it was working from a long time and recently it is causing this problem and only with some systems.

So i dont think it is the problem with coding, it might be the problem with PC because it varies from PC to PC.

Thanks & Regards,
Ramarao.

CPallini2-Apr-08 1:51

CPallini

2-Apr-08 1:51

Have you initialized properly the MSGBOXPARAMS struct?
For instance, missing mp.cbSize = sizeof(mp); is a common pitfall.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

Re: Application is crashing when trying to display messagebox

RamaraoPV2-Apr-08 2:10

Re: Application is crashing when trying to display messagebox

2-Apr-08 2:10

Yes everything is fine it was working from a long time and recently it is causing this problem and only with some systems.

So i dont think it is the problem with coding, it might be the problem with PC because it varies from PC to PC.

Thanks & Regards,
Ramarao.

Cedric Moonen2-Apr-08 2:21