update listbox from child

[suntanme]

Pushing the limits for the beginner... I have a tab control on a dialog box that updates records. After the records are updated, they are displayed in a listbox on the parent. Can anyone suggest how to signal the parent to update this listbox from the child.

 

[victorv]

Hi,

If I have understood, you have a main win with a listbox,

and pressing something, you execute a myDialog.DoModal().

When the control returns in the main win (after DoModal)

you can test the return value of it or a variable of
that class (known by Class of mydialog and the caller )

If the variable is IDOK ( of TRUE ) recall the routine,
in the calling class, you used to fill 1st time the listbox.

The easier mode is to rebuild all listbox; more sophisticated may be the substitution of just modified line.

b y e .

 

[suntanme]

My stumbling block is that the dialog is modeless. So after I enter the information and save it to the database, I need to focus on the parent and run the list function.

 

[victorv]

Hi,

reading beginner, I thinked... ,now it is clear !

You have to define a USER message :

#define WM_MYMESSAGE WM_MESSAGE+1

In the class of DialogBox add a pointer to caller view
m_pView, and load it by "this" before launch dialog box.

In the function CMyDialog::OnOK, call

if( m_pView != NULL )
m_pView->PostMessage( WM_MYMESSAGE, IDOK ) ;

Then in the calling message loop add

after BEGIN_MESSAGE_MAP and
before AFX_MSG_MAP

ON_MESSAGE( WM_MYMESSAGE, OnMyRefresh )

define

LRESULT CMyView::OnMyRefresh( WPARAM wParam, LPARAM lParam)
{
...
Reload Listbox

}

In header file of calling View add

afx_msg LRESULT OnMyRefresh(WPARAM,LPARAM)

(before DECLARE_MASSAGE_MAP()
after //}}AFX_MSG

 

[suntanme]

Thank you victorv for the direction to go in. I can call the message from within CMyView and it pulls the OnMyRefresh. However, I think I am missing something obvious about the pointer to call it in CMyDialog.

Could you elaborate on this?

In the class of DialogBox add a pointer to caller view
m_pView, and load it by "this" before launch dialog box.

Again, thank you ...