C / C++ / MFC

8-Dec-13 8:50

The objective is to create a class that contains the methods to create and gather messages from a series of message dialogs by means of a series of buttons on a dialog created with the resource editor.

The app is being written with VS 2010 and the classes, events etc. utilizing the supplied Wizards. This is an SDI app with p_MFCls-> pointing to the MainFrameEx* object and p->MsgCls being the child of p_MFCls-> and a CWnd* object. p_Dlg-> is a pointer to the actual dialog box and is a CDialog* object parented by the p_MsgCls object.

FWIW: Windows 8.1

I have the following code (partial):

In p_MFCls:
//.h

CJBK_Msg*         p_MsgCls;

//.cpp

p_MsgCls = new CJBK_Msg;
      ASSERT(p_MsgCls->Create(NULL, NULL, 0, CRect(0, 0, 0, 0), this, IDCls_Msg));

In p_MsgCls, when the appropriate message is received, we have:

//.h
CDialog*      p_DlgBox;

//.cpp
<pre lang="cs">p_DlgBox = new CDialog;
      ASSERT(p_DlgBox->Create(p_strMsgBox->nDlgBoxResID, this));

For the button(s), I used the Event Handler Wizard but whether I tell it to send the event to p_MFCls or p_MsgCls, it never gets there when I click the button control.

Can anyone spot something that I have missed?

Thanks and Happy Holidays to all,

Barry

Richard MacCutchan8-Dec-13 22:21

8-Dec-13 22:21

BarryPearlman wrote:
Can anyone spot something that I have missed?

Where is the actual event handling code? What you have shown above does not tell us anything about where these events are supposed to be captured.

Veni, vidi, abiit domum

BarryPearlman9-Dec-13 3:45

9-Dec-13 3:45

Sorry about that! Ideally the button click event should be handled first in p_MsgCls since p_MsgCls-> is intended to handle all of the messages for the entire application. Second choice is CMainFrameEx.

Using the Event Handler Wizard for p_MsgCls I get:

//.h

DECLARE_MESSAGE_MAP()
public:

afx_msg void OnBnClicked_MB_Btn2();

//.cpp

BEGIN_MESSAGE_MAP(CJBK_Msg, CWnd)

                ..........................

  ON_BN_CLICKED(ID_MB_Btn_2, &CJBK_Msg::OnBnClicked_MB_Btn2)
END_MESSAGE_MAP()

void CJBK_Msg::OnBnClicked_MB_Btn2()
{
  // TODO: Add your control notification handler code here
}

I am working under the assumption that if the Event Handler Wizard (in general) presents me with a choice, it is a valid one and will work.

Thanks,

Barry

Richard MacCutchan9-Dec-13 3:54

9-Dec-13 3:54

BarryPearlman wrote:
I am working under the assumption

Never do that, check everything. However good the wizards may be they are not infallible. You can easily check that things are plugged together correctly by setting a few breakpoints in your code and running some controlled tests.

Veni, vidi, abiit domum

BarryPearlman9-Dec-13 4:08

9-Dec-13 4:08

I always do. That is how I found out that the code that the Event Wizard Handler was writing code that wasn't working in the first place. The question still remains why can't I get the event to fire in p_MSCls->?

Thanks,

Barry

Richard MacCutchan9-Dec-13 5:12

9-Dec-13 5:12

Does the control that raises the event belong to this class, and are the message macros pointing to the right places? From the little pieces of code you have shown us it is not easy to understand how your project fits together.

Veni, vidi, abiit domum

BarryPearlman9-Dec-13 9:27

9-Dec-13 9:27

You may be on the right class concerning who belongs to which class and hence the missing events. I will get back to this project later on in the week and thanks to you have some new avenues to explore.

Thanks & Happy Holidays,

Barry

Freak309-Dec-13 1:18

Freak30

9-Dec-13 1:18

You have wrapped the Create() functions in ASSERT() macros, which at least in Visual Studio 6.0 means they are executed only in debug mode. Assuming this behavior has not changed in VS 2010, you should use VERIFY() instead.

The good thing about pessimism is, that you are always either right or pleasently surprised.

BarryPearlman9-Dec-13 4:02

9-Dec-13 4:02

This post dealt with missing events, not a request for the difference between ASSERT() and VERIFY()! Frankly, I am hard pressed to find a decent explanation of the fine nuances between them, except their use during runtime and debug.

It is my own personal philosophy that the end user should never see the arcane messages these macros produce. An error at a hex address means absolutely nothing to a user except that there is an error and that the developer has failed to take something into account.

Perhaps a philosophical dissertation/lecture is in order here??

Freak3010-Dec-13 22:51

Freak30

10-Dec-13 22:51

This wasn't meant as a philosophical discussion. If you enclose an important function call, e.g. the creation of a dialog in an ASSERT(), the dialog will not be created in Release mode and therefore can't receive any messages.

If you use VERIFY(), the dialog will be created in Release mode as well. However, the "arcance message" as you call it, will only be displayed in Debug mode.

The good thing about pessimism is, that you are always either right or pleasently surprised.

Morse code in Cpp

Dhananjay RajeNimbalkar6-Dec-13 23:16

Dhananjay RajeNimbalkar

6-Dec-13 23:16

I'm doing project on morse code translator in Cpp Im unable to write it?? plz help ....

Richard MacCutchan7-Dec-13 1:18

7-Dec-13 1:18

Help with what? Please don't expect people here to do your work for you.

Veni, vidi, abiit domum

jschell7-Dec-13 10:37

jschell

7-Dec-13 10:37

Dhananjay RajeNimbalkar wrote:
plz help ....

Steps:
1. Learn the basics of C++.
2. Presumably you are going to do this from the command line so learn how to accept input and write output to the console in C++.
3. Learn how to parse a string (input)
4. Learn how arrays work.
5. Find source for a morse code map.
6. Put all of the above together to make your application.

David Crow8-Dec-13 16:34

David Crow

8-Dec-13 16:34

Read and heed here.

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

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous

How to prevent deleting files from Browse dialog

Alan Balkany11-Dec-13 6:55

Alan Balkany

11-Dec-13 6:55

I did one of those many years ago. Since everyone's morse-code sending speed is a little different, you have to take this into account.

For a morse-code message you have pulses of different lengths. Sort the pulses by duration. Then look for the biggest gap between durations: This is the threshold between a "dot" and a "dash".

Now you can translate the pulses into dots and dashes, and the rest is just programming technique.

tagopi4-Dec-13 22:33

tagopi

4-Dec-13 22:33

Hello everybody,

I am in project with win32.

I am using OPENFILENAME structure for selecting a file (GetOpenFileName()).

Problem is, it is possible to delete a file in browse dialog, which will create some issues.

is there any way to prevent deleting the files in browse dialog?

Regards,
A. Gopinath.

Re: How to prevent deleting files from Browse dialog

CPallini5-Dec-13 0:08

CPallini

5-Dec-13 0:08

In order to have full control, you might implement the hook procedure.

Veni, vidi, vici.

Re: How to prevent deleting files from Browse dialog

David Crow5-Dec-13 4:48

David Crow

5-Dec-13 4:48

This comes to mind.

How to repair IME in my application

buaaxiao4-Dec-13 20:17

buaaxiao

4-Dec-13 20:17

I'm working with a MFC program based on DHTMLDialog in visual studio 2010, one problem is that sometimes IME is disabled in my program, which means I can only input English(no chinese) in it, another is that sometimes chinese can be input but the IME candidate window don't appear.( Confused | :confused:

)

one cause of the first problem found is that flash disabled IME of the program via some C api.

How can I repair it? I try to use WINNLSEnableIME but seems to be no effective

Regards,
buaaxiao

modified 5-Dec-13 7:37am.

Re: How to repair IME in my application

buaaxiao27-Dec-13 16:13

buaaxiao

27-Dec-13 16:13

In MFC, when opening a file or creating a file, is WM_PAINT generated?

rainclear4-Dec-13 10:12

rainclear

4-Dec-13 10:12

Hello,

I am learning MFC programming with the book "Programming Windows with MFC (2nd Edition)". I have some questions about the book example from chapter 9.

When I open a file or click new file, the function CSquaresView::OnDraw() is called. I checked the stack, the reason is that CView::OnPaint() calls this function. But I don't understand how CView::OnPaint() is called. Is the message WM_PAINT generated if CSingleDocTemplate::OpenDocumentFile() is called by the default setting? Is it possible to change the behavior?

Thanks,
Brian

Re: In MFC, when opening a file or creating a file, is WM_PAINT generated?

Richard Andrew x644-Dec-13 16:02

Richard Andrew x64

4-Dec-13 16:02

My best guess is that the framework is drawing the view because a new document has just been loaded into it.

What is it you are trying to achieve?

Probably the only thing you can change is how the message is handled, not that the message is received.

Override the CView's OnWndMsg function to alter how any message is handled.

The difficult we do right away...
...the impossible takes slightly longer.

Re: In MFC, when opening a file or creating a file, is WM_PAINT generated?

Richard MacCutchan4-Dec-13 22:07