C / C++ / MFC

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

4-Jan-09 21:44

SanjaySMK wrote:
the required no. of CListCtrl-derived class objects are also getting created successfully

Are you sure? How are you verifying that?

What code are you using to create your custom control class?

If the controls are in a dialog, how are you associating your
custom control class with a control on the dialog?

I tested on a dialog by adding this member to the dialog class

CReflectedListCtrl m_ListCtrl;

and associating it with a ListView control on the dialog resource by
adding this to the dialog class' DoDataExchange()

DDX_Control(pDX, IDC_LIST1, m_ListCtrl);

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

SanjaySMK4-Jan-09 22:16

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

4-Jan-09 22:16

I called a message box from within the constructor of CListCtrl-derived class for which I declared two objects in its parent dialog class, and on both of their construction, I get this message box twice. That's how I ensured.

Software Developer
Sanjay Khapre

Mark Salsbery5-Jan-09 5:59

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

5-Jan-09 5:59

That covers the C++ object....you also need the HWND object.

Again, how are you associating the control with the C++ object?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

SanjaySMK5-Jan-09 21:24

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

5-Jan-09 21:24

I am subclassing both CListCtrl-derived class and the Combo box objects.

Software Developer
Sanjay Khapre

Mark Salsbery6-Jan-09 5:03

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

6-Jan-09 5:03

Still not answering my question however Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

SanjaySMK6-Jan-09 19:43

Re: WM_LBUTTONDOWN not working with CListCtrl class!! [modified]

6-Jan-09 19:43

Sorry if I haven't answered your last question. The thing is, that subclassing is used in case of CListCtrl-derived class, the reason why I don't see its varible entries inside DoDataExchange, hence the problem. That means the requirement is that of making LBUTTONDOWN and LBUTTONDBLCLK work with subclassed windows of CListCtrl-derived class. Can you help me out with this?

Thanks in advance.

Software Developer
Sanjay Khapre

Mark Salsbery6-Jan-09 20:33

Re: WM_LBUTTONDOWN not working with CListCtrl class!! [modified]

6-Jan-09 20:33

You have to add the entries to DoDataExchange if they are not there.

If the listview controls are in the dialog resource, you can use the wizard
to add a control variable. It will add an entry like

DDX_Control(pDX, IDC_LIST1, m_ListCtrl);

Change m_ListCtrl's type to your derived type in the header file.
Then the control will be subclassed.

From my previous working sample code:

// In the dialog class
	CReflectedListCtrl m_ListCtrl;


// The dialog class' DoDataExchange() override
void CMyDialog::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	DDX_Control(pDX, IDC_LIST1, m_ListCtrl);
}

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

modified on Wednesday, January 7, 2009 2:40 AM

SanjaySMK7-Jan-09 21:27

Re: WM_LBUTTONDOWN not working with CListCtrl class!! [modified]

7-Jan-09 21:27

In which case CWnd::SubclassWindow(HWND DocumentList) fails? Even though, the variable HWND DocumentList which I am using as its parameter is locally declared and initialized where I am calling SubclassWindow, still SubclassWindow is failing(Debug Assertion Failure!). What is its remedy? Could u please suggest?
DocumentList parameter is declared and initialized some lines before calling SubclassWindow, as following:

HWND DocumentList = CreateDocumentList(parenthandle, rect.left, rect.top, rect.Width(), rect.Height(), someflag) ;

Line 1
Line 2
Line 3

SubclassWindow(DocumentList) ; // which fails here, why?

Software Developer
Sanjay Khapre

modified on Thursday, January 8, 2009 5:24 AM

SanjaySMK8-Jan-09 1:26

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

8-Jan-09 1:26

I got the answer of why SubclassWindow was failing, it was because I had DDX_Control entries inside DoDataExchange function, which shouldn't be there, otherwise the parameter to SubclassWindow will always be attached to the parent dialog box, which doesn't fit its criterion. But now after that, the messages WM_LBUTTONDOWN and WM_LBUTTONDBLCLK should run, which are not running. That means my question is, after calling CWnd::SubclassWindow function, why these two messages do not respond at all?Please suggest some remedy.

Software Developer
Sanjay Khapre

modified on Thursday, January 8, 2009 9:34 AM

Mark Salsbery8-Jan-09 4:35

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

8-Jan-09 4:35

Why are you calling SubclassWindow?

If you're using MFC you very rarely need to explicitly call it.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Mark Salsbery8-Jan-09 4:42

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

8-Jan-09 4:42

Where is this code called from? You really need to provide a context.
If SubclassWindow is the CWnd SubclassWindow method, then what's the class you are
calling it from?

SanjaySMK wrote:
which fails here, why?

Why don't you step into the function with the debugger and find out? Smile | :)

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

SanjaySMK8-Jan-09 18:18

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

8-Jan-09 18:18

I have a method in CListCtrl-derived class, from where I am calling CWnd::SubclassWindow, and after calling that, WM_LBUTTONDOWN and WM_LBUTTONDBLCLK do not get called at all.

Software Developer
Sanjay Khapre

Mark Salsbery9-Jan-09 5:31

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

9-Jan-09 5:31

You still haven't answered WHY you are calling SubclassWindow.

Where do the CListCtrl derived objects come from? Show some code.

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

SanjaySMK13-Jan-09 23:12

Re: WM_LBUTTONDOWN not working with CListCtrl class!!

13-Jan-09 23:12

CListCtrl derived objects come from the parent class, i.e. the dialog class, I call one member function of CListCtrl-derived class, SubClassMyList, in which I am calling SubclassWindow(HWND) function, after which mouse events don't work on this derived class.

Sorry, I was away for some days, hence couldn't update you quickly.

Software Developer
Sanjay Khapre

Mark Salsbery14-Jan-09 5:50

Re: WM_LBUTTONDOWN not working with CListCtrl class!! [modified]

14-Jan-09 5:50

SanjaySMK wrote:
in which I am calling SubclassWindow(HWND) function

I don't know how many times I've asked why...

All my MFC controls for the past decade have got mouse messages just fine without calling subclassWindow...

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

SanjaySMK14-Jan-09 19:31

Print in an SDI application

14-Jan-09 19:31

Dear Mark,
First of all, I am very sorry if I have tested your patience, although unknowingly and unintentionally. I have some big code of my project, which was running fine in Visual C++ 6.0(in which it was first written), but which I now needed to convert to Visual C++ 2005. After everything I have explained till date, since the functionality(mouse events) after conversion is not running in VC 2005, I created my own MFC application in VC 2005, in which, like the project code, I tried using CWnd's SubclassWindow(HWND). Since this functionality was running in VC 6.0, I need to keep and also make it run in VC 2005. Hence the inclusion of SubclassWindow also in my code(the sample application which I am trying these things in). I hope I am very much clear this time. Could you please help?

Software Developer
Sanjay Khapre

modified on Friday, January 16, 2009 12:45 AM

nobaq2-Jan-09 1:31

nobaq

2-Jan-09 1:31

Hi,

In my MFC SDI application, there is a "File | Print" automatically created from the wizard which prints my CHtmlView successfully.

Now I would like to issue this command *manually* from my view.

Which method do I need to call?

Thank you!

Paresh Chitte2-Jan-09 1:40

Paresh Chitte

2-Jan-09 1:40

Is ShellExecute (with verb "print") helpful ?

Regards,
Paresh.

nobaq2-Jan-09 1:48

nobaq

2-Jan-09 1:48

Hi,

I do not think so; I have dynamic HTML code written to my CHtmlView which I want to print the same way as with File | Print.

I tried a little bit with ShellExecute but it does not work as expected.

Regards,
Niki

Jijo.Raj2-Jan-09 2:13

Jijo.Raj

2-Jan-09 2:13

Use this code snippet to print your view from anywhere. The core idea is to call CView::OnCmdMsg() by passing ID_FILE_PRINT or ID_FILE_PRINT_DIRECT.

// Get the active view.
CFrameWnd* pFrameWnd = (CFrameWnd*)AfxGetApp()->GetMainWnd();
CView* pView = pFrameWnd->GetActiveView();

if( pView != NULL )
{
    // Send Print message. 
    // If you want to print directly, then change ID_FILE_PRINT to ID_FILE_PRINT_DIRECT.
    pView->OnCmdMsg( ID_FILE_PRINT, 0, 0, 0 );
}

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.