Re: BN_CLICKED - C / C++ / MFC Discussion Boards

Gary R. Wheeler1-Apr-03 14:30

1-Apr-03 14:30

CEdit edit_control;

edit_control.SetSel(0,-1,FALSE);

This will force the edit control to scroll the last line into view whenever you add more text.

You need to be a little careful in how you use this. Each time you do this, you'll scroll the control down, even if the user was trying to scroll the control himself. A simple solution is to have a check box off to the side, perhaps labelled "update". If the update box is checked, you scroll the last line into place. If it's not checked, assume that the user is looking at the data, and doesn't want the scrolling to happen. You can still update the text in the edit control in this case, although you may need to make sure you save the user's selection (GetSel() and SetSel()) and restore it after you update the text.

Software Zen: delete this;

Re: Scrolling edit control to bottom?

IGx891-Apr-03 14:40

IGx89

1-Apr-03 14:40

It doesn't work Frown | :(

You can see my app here, if seeing the edit control in action might help: http://www.lancersreactor.com/t/download/download.asp?id=123

Purify or BoundsChecker?

Jon Sagara1-Apr-03 13:45

Jon Sagara

1-Apr-03 13:45

Which product is the better of the two?

Jon Sagara

You know the world is off tilt, when the best rapper is a white guy, the best golfer is a black guy, the tallest basketball player is Chinese, and Germany doesn't want to go to war.
-- Charles Barkley

Re: Purify or BoundsChecker?

dahicke1-Apr-03 13:55

dahicke

1-Apr-03 13:55

I am currently using BoundsChecker, though I have used Purify in the past (about 4 years ago on VC++ and SGI). Both are good products, though I think BoundsChecker is easier to use. If you are getting this for a company and getting multiply copies, I would think about getting one of each. Each has their strengths, one may find something the other may miss.

Dave Hickerson
david.a.hickerson@boeing.com

Re: Purify or BoundsChecker?

Taka Muraoka1-Apr-03 13:58

Taka Muraoka

1-Apr-03 13:58

I gave the trial version of this a go a while back and it seemed pretty good:

http://www.codeproject.com/showcase/MemoryValidator.asp[^]

Software is everything. It also sucks. Charles Fishman [^]

Awasu 1.0.2 (beta)[^]: A free RSS reader with support for Code Project.

Re: Purify or BoundsChecker?

Mustafa Demirhan1-Apr-03 21:20

Mustafa Demirhan

1-Apr-03 21:20

I tried both of them recently and BoundsChecker worked much better for me. I have a project with 120,000 lines of code and Purify generally was not able to operate correctly. It generally stops execution on some API calls, which are valid calls. Even if it works fine, the resource and error leak analysis of Purify was not as good as BoundsCheckers analysis (it was not even close to it).

Currently I am using BoundsChecker and it works like a charm. It has more features than Purify and its integration to Visual C++ is much better.

You can request a trial for both of the products. Just try and see both of them...

Mustafa Demirhan
http://www.macroangel.com
Sonork ID 100.9935:zoltrix

<nobr>They say I'm lazy but it takes all my time

BN_CLICKED

lucy1-Apr-03 11:52

lucy

1-Apr-03 11:52

I created a new class based on CButton -- CMyButton. I add a message notification handler in CMyButton.cpp for =BN_CLICKED to change an protected member variable of CMyButton.

void CMyButton::OnClicked()
{
    m_nState += 1;
}

Using resource editor, I put an instance of CMyButton to my dialog template. I want my dialog to handle the BN_CLICKED also, do some other stuff.

void CMyDlg::OnMyBtn()
{
    MessageBox("Button pressed.");
}

The problem is: CMyDlg::OnMyBtn is never called, even though I add the style of "Notify" to the button instance in the resource editor. What am I missing here?

TIA!

Re: BN_CLICKED

Gary R. Wheeler1-Apr-03 14:02

Gary R. Wheeler

1-Apr-03 14:02

You need an entry in the message map for CMyDlg that 'connects' your button to the handler.

BEGIN_MESSAGE_MAP(CMyDlg, CDialog)
	//{{AFX_MSG_MAP(CMyDlg)
	ON_BN_CLICKED(IDC_Control_ID, OnMyBtn)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

IDC_Control_ID is the resource ID for the button that you assigned when you created it.

To get a feel for this, use the wizard to create a simple dialog application. In the resource editor, drop a button on the dialog. In VC6, right-click on the button you just added and select Events. In VS.NET, right-click and select Add Event Handler. This lets you add code to the dialog class to handle events from the button. Take a look at the code generated by the wizard. It adds code in the following places:

A declaration is added to MyDlg.h for the button handler. This will be a line of the form afx_msg void OnMyButton();
An entry is added to the message map like the example above.
A definition of the handler is added to MyDlg.cpp, similar to the following:

void MyDlg::OnMyButton()
{
    // handle the button
}

Software Zen: delete this;

Re: BN_CLICKED

lucy2-Apr-03 5:22

lucy

2-Apr-03 5:22

yes, I already had it. It seemed to me that the BN_CLICKED is processed by the button itself and the message never get to the dialog.

I add the following to CMyButton::OnClicked:

GetParent()->PostMessage(WM_COMMAND,
    MAKEWPARAM(this->GetDlgCtrlID(), BN_CLICKED),
    LPARAM(this->m_hWnd));

but it didn't help. Confused | :confused:

Any hint?

MDI maximized & restored

Brian Shifrin1-Apr-03 11:50

Brian Shifrin

1-Apr-03 11:50

May be this was discussed earlier, but is there way to have Maximized and Restored children of MDI, or prevent Restore from affecting other windows. Something like Opera & dialog popup.

Thanks,
Brian

Pointer access

Gabor Kalman1-Apr-03 11:13

Gabor Kalman

1-Apr-03 11:13

Here are two code fragments.
I would like to understand what is the problem with the second one?
It is almost identical to the first one, except I wanted to use
a "pointer access". (e.g: CDlg* p_dlg; p_dlg-> . . .)

// The following code fragment works OK:
//=================================================
// this is in MainFrm.h:
#include "Dlg.h"

public:
CDlg dlg;

//----------------------------------------------------
// this is in MainFrm.cpp:

void CMainFrame::OnShowDlg()
{
dlg.Create(IDD_DLG,this);
dlg.SetWindowPos(&wndTop,10,10,20,10,SWP_SHOWWINDOW);
dlg.ShowWindow(SW_SHOW);
}

*********************

//The following code fragment compiles OK
//but the modeless window does not show:
//===========================================

// this is in MainFrm.h:
#include "Dlg.h"

public:
CDlg* p_dlg; //pointer !!

//----------------------------------------------------
// this is in MainFrm.cpp:

void CMainFrame::OnShowDlg()
{
p_dlg->Create(IDD_DLG,this);
p_dlg_SetWindowPos(&wndTop,10,10,20,10,SWP_SHOWWINDOW);
p_dlg->ShowWindow(SW_SHOW); //will NOT show!!!

Thank you:

Gabor Kalman
Kalman_G@MSN.COM

Re: Pointer access

Dave Bryant1-Apr-03 11:29

Dave Bryant

1-Apr-03 11:29

You need to create the C++ object before you use it:

void CMainFrame::OnShowDlg()
{
  if ( NULL == p_dlg )
    p_dlg = new CDlg();

  p_dlg->Create( IDD_DLG, this );
  // etc.
}

Dave
http://www.cloudsofheaven.org

Size of dialog in resource

JGranborg1-Apr-03 10:56

JGranborg

1-Apr-03 10:56

I have some views defined in the resource file.
I display these in a splitterwnd. I like to know the size of the dialog in the resource file so that I can resize the splitters according to this size.
How to?
yours sincerly
Jørgen Granborg

Re: Size of dialog in resource

Gary R. Wheeler1-Apr-03 14:08

Gary R. Wheeler

1-Apr-03 14:08

The simplest way would be to create the dialogs modeless and not visible, and then get the size of their window. You can then destroy them and recreate them within your splitter, knowing the size.

Software Zen: delete this;

Dynamic Arrays and Array sizes

einst9921-Apr-03 10:41

einst992

1-Apr-03 10:41

Im working on a program that luanches programs, please dont laugh... Im workin on make the program more customizeable. To do this im going to use a file that holds all the programs to be launched in it. Each line contains a path to a program. The program then reads the file and adds each string to a dynamic array. The problem is i dont know how to add each program to the array with out overwriteing previous ones. And, when i go to loop back and execute each program, i dont know how many elements are in the array so i dont end up in an endless loop. Please help

~~~~~~~~~~~~
~~NICHOLAS~~
~~~~~~~~~~~~

Re: Dynamic Arrays and Array sizes

C^hris L^osinger1-Apr-03 10:49

C^hris L^osinger

1-Apr-03 10:49

use std::vector for your 'dynamic array'. you can insert anywhere in the array (no 'overwriting'); you can get the size of the array with myvector.size(); it will handle cleanup and will generally make your life better.

-c

Image tools: ThumbNailer, Bobber, TIFFAssembler

Re: Dynamic Arrays and Array sizes

einst9921-Apr-03 11:33

einst992

1-Apr-03 11:33

Okay where is the inlcude file for vectors and also how do i add an item to it? thanks

~~~~~~~~~~~~
~~NICHOLAS~~
~~~~~~~~~~~~

Re: Dynamic Arrays and Array sizes

Nick Parker1-Apr-03 11:56

Nick Parker

1-Apr-03 11:56

#include <vector>
using namespace std;

vector<CString> myVect;
myVect.push_back(_T("Nick"));
myVect.push_back(_T("Parker"));

-Nick Parker

Re: Dynamic Arrays and Array sizes

einst9921-Apr-03 14:12

einst992

1-Apr-03 14:12

Okay now how do i iterate through the elements and get their value??

~~~~~~~~~~~~
~~NICHOLAS~~
~~~~~~~~~~~~

Re: Dynamic Arrays and Array sizes

Nick Parker1-Apr-03 14:55

Nick Parker

1-Apr-03 14:55

Use an iterator:

vector<CString>::iterator myIter;

-Nick Parker

Re: Dynamic Arrays and Array sizes

Dave Bryant1-Apr-03 10:49

Dave Bryant

1-Apr-03 10:49

Use a vector rather than an array - it will keep track of the size for you.

Dave
http://www.cloudsofheaven.org

Re: Dynamic Arrays and Array sizes

John R. Shaw2-Apr-03 11:10

John R. Shaw

2-Apr-03 11:10

If you are using MFC (you did not say) then just use class CStringArray.

Trust in the code Luke. Yea right!

cannot run on windows95??

lucy1-Apr-03 9:40

lucy

1-Apr-03 9:40

I have a program which read the serial port. I have it running okay on Windows 2000, but when I tried on Windows95, this is the error message I got:

"Linked to missing export KERNEL32.DLL:Cancello"
"A device attached to the program is not functioning"

What can be wrong? TIA!

Re: cannot run on windows95??

C^hris L^osinger1-Apr-03 9:42

C^hris L^osinger

1-Apr-03 9:42

the program uses a function that is not available in the Win95 kernel.

-c

Image tools: ThumbNailer, Bobber, TIFFAssembler

Re: cannot run on windows95??

lucy1-Apr-03 9:43

lucy

1-Apr-03 9:43

thank you! Rose | [Rose]

I will let my partner know that I am not supporting Windows95 then. Dead | X|

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