C / C++ / MFC

11-Sep-06 1:45

I tried running the sample provided with MSDN. It also fails with the same error code. Does anybody know why is the function call failing in my computer?

Help with MFC Timers

waxie11-Sep-06 1:22

waxie

11-Sep-06 1:22

Hi guys,

I tried making my own timer application, where a number increments every second.
I just wonder how SetTimer() and OnTimer() works? My timer class really does not work! Dead | X|

It can initialize the timer but then it does not get into the OnTimer() function even when the time is due. Cry | :((

How does this really work? I would really appreciate it if someone can give me a simple but concrete example. Yes, there are some samples in the internet, but really, I could not understand the mechanics beneath them. Can someone provide me with simple steps on creating this simple timer class?

If I could only make this work.. my timer class is super essential to make everything in my application work.

To the person who could help me with this, kudos to you! Cool | :cool:

Many thanks,

Rose | [Rose]

Christina

prasad_som11-Sep-06 1:34

prasad_som

11-Sep-06 1:34

waxie wrote:
It can initialize the timer but then it does not get into the OnTimer() function even when the time is due.

Can you show how you have initialized it?
Simple example would be like this

BEGIN_MESSAGE_MAP(CMainFrame, CFrameWnd)
	//{{AFX_MSG_MAP(CMainFrame)
	ON_WM_CREATE()
	ON_WM_TIMER()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

//Create timer in OnCreate
int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	//some other stuff
	SetTimer(1,1000,NULL);
        return 0;
}
//handler
void CMainFrame::OnTimer(UINT nIDEvent) 
{
	CFrameWnd::OnTimer(nIDEvent);
//handle
}

Prasad
Notifier using ATL

Ranjan Shrestha11-Sep-06 1:38

11-Sep-06 1:38

For your using OnTimer() you need to inherit your class from CWnd base class.

// Header file should look like this
class CMyTimer: public CWnd
{
...

afx_msg void OnTimer(UINT nIDEvent);
DECLARE_MESSAGE_MAP()
};

// Source file should look like this

....
BEGIN_MESSAGE_MAP(CMyTimer, CWnd)
ON_WM_TIMER()
END_MESSAGE_MAP()

void CMyTimer::OnTimer(UINT nIDEvent)
{
//Todo
}

Do not forget to create a timer object after construction the object
i.e., any where in the program you should -
CMyTimer *pTimer = new CTimer;
pTimer->Create(......);

pTimer->SetTimer(.....);

Your Timer should then work.

Kurt _B11-Sep-06 3:31

Kurt _B

11-Sep-06 3:31

Why would you create a whole class just for a timer? Seems to be overkill.

waxie11-Sep-06 15:25

waxie

11-Sep-06 15:25

Kurt _B wrote:
Why would you create a whole class just for a timer? Seems to be overkill.

LOL.

Good point. Just for testing - because my timer in my application is not working. I finally figured it out! Wink | ;)

Christina

waxie11-Sep-06 15:26

waxie

11-Sep-06 15:26

Ranjan Shrestha wrote:
BEGIN_MESSAGE_MAP(CMyTimer, CWnd)
ON_WM_TIMER()
END_MESSAGE_MAP()

My problem was with (above). How stupid of me. Mad | :mad:

I finally got it. I overlooked my code. Thanks ranjan! Smile | :)

Christina

[Message Deleted]

bloodwinner11-Sep-06 1:20

bloodwinner

11-Sep-06 1:20

[Message Deleted]

Ranjan Shrestha11-Sep-06 1:25

11-Sep-06 1:25

hIcon = (HICON)LoadImage(...)

should work

Code_Zombie11-Sep-06 1:27

Code_Zombie

11-Sep-06 1:27

Try (HICON)LoadImage(NULL, "menu_two.ico", IMAGE_ICON, 32, 32, LR_LOADFROMFILE);

Thanks

Code_Zombie11-Sep-06 1:29

Code_Zombie

11-Sep-06 1:29

try
<code>
(HICON)LoadImage(NULL, "menu_two.ico", IMAGE_ICON, 32, 32, LR_LOADFROMFILE);
</code>

Thanks

toxcct11-Sep-06 2:20

toxcct

11-Sep-06 2:20

prefer C++ casts :

hIcon = static_cast<HICON*>(LoadImage(NULL, "menu_two.ico", IMAGE_ICON, 32, 32, LR_LOADFROMFILE));

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

Re: [Message Deleted]

Hamid_RT11-Sep-06 5:41

11-Sep-06 5:41

Why you delete your post?

WhiteSky

Re: [Message Deleted]

bloodwinner11-Sep-06 5:47

bloodwinner

11-Sep-06 5:47

Sorry, I won't do it next time!

I just thought maybe I asked too much today. But it now apparently appears not.

Re: [Message Deleted]

Hamid_RT11-Sep-06 6:27

11-Sep-06 6:27

When you ask a question you get many answers and if some one has like a question he gets his answer Big Grin | :-D

WhiteSky

Input validation

Sculp11-Sep-06 1:11

Sculp

11-Sep-06 1:11

Hi,
I am using VC++ 6.0. I have created a dialog based application using "MFC AppWizardExe". I have placed some edit boxes on it.
Now if I want to validate the data entered in the edit boxes then how can I achieve the same.
Suppose I have three edit boxes for entering name,age and salary respectively.
How can I make such a validation that user wont be able to entre other than character (A to Z) in name edit box.
Simillarly I dont want to allow the user to enter character / special characters in age / salary edit box.

How can I achieve the above mentioned validations?

Sarath C11-Sep-06 1:22

Sarath C

11-Sep-06 1:22

It can be handled in ON_WM_KEYDOWN message handler

-Sarath.
The more you can dream the more you can do - Michael Korda"

My blog - Sharing My Thoughts, An Article - Understanding Statepattern

toxcct11-Sep-06 2:22

toxcct

11-Sep-06 2:22

handle WM_CHAR instead. when you get a character that shoulld be allowed in the editbox, then pass it to the base class handler. otherwise, simply don't redirect the call.

TOXCCT >>> GEII power

[VisualCalc 3.0 updated ][Flags Beginner's Guide new! ]

David Crow11-Sep-06 3:11

David Crow

11-Sep-06 3:11

Another alternative is a masked (i.e., formatted) edit control.

"Talent without discipline is like an octopus on roller skates. There's plenty of movement, but you never know if it's going to be forward, backwards, or sideways." - H. Jackson Brown, Jr.

"Judge not by the eye but by the heart." - Native American Proverb

Re: Loading/Saving Dialogs

Zac Howland11-Sep-06 3:57

Zac Howland

11-Sep-06 3:57

After you place your edit boxes on the dialog, assign them to variables of the type that you want (e.g. int or UINT for age) and then you can specify a range that the data must fit into. This will add DDV_ calls into your DoDataExchange function that will handle everything you need for you (and even pop up a message box if the user enters data outside the range you specified).

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Loading/Saving Dialogs

Larry A Mills Senior11-Sep-06 0:51

Larry A Mills Senior

11-Sep-06 0:51

Can some explain how, WITH A WORKING EXAMPLE, to display a "Loading" or "Saving" that has no buttons on it, (only a "progress bar") that can be displays ON CALL and timed to destroy itself without user intervention when the loading/saving has been accomplished. I need this for a project I'm developing. EXAMPLES please!

I'm programming using MFC code so I need examples using MFC.

From Larry A Mills Sr

Ranjan Shrestha11-Sep-06 1:42

Re: Loading/Saving Dialogs

11-Sep-06 1:42

You can use 'DoModal()' function to show the dialog box and then start a timer using SetTimer() then on 'OnTimer()' event call 'EndDialog(IDOK or IDCANCEL)' to close the dialog.

Hamid_RT11-Sep-06 2:04

Re: Loading/Saving Dialogs

11-Sep-06 2:04

I think he needs to hide Open & Cancel in Open/Save File dialog

WhiteSky

Hamid_RT11-Sep-06 1:55