how to Get And Send Msg from PopUp ListBox to Parant->Parant class

Question

Dear All,

trying to make a custom property grid. with the help of SM-4238 i made PopUp ListBox and it comes fine.

But
in my custom Listbox, I use SelChange. and it is not getting any msg when I select items. so how do I get it? and how to send rise event to Parant->Parant class from ListBox.

void x_ListBox::OnLbnSelchange()
{
    try
    {
        auto sel_Idx = GetCurSel();
        ReleaseCapture();
        GetParent()->DestroyWindow();
    }
    catch (CException* p)
    {
        p->Delete();
    }
}

I use that list box in the PopUp Window class, and PopUp window class in the Dialog box.

if possible, I like to use it as a normal CListbox in DialogBox made in MFC. like when we double click it will give event and msg by the wizard. Like this

BEGIN_MESSAGE_MAP(x_ListBox, CListBox)
ON_CONTROL_REFLECT(LBN_SELCHANGE, &x_ListBox::OnLbnSelchange)
END_MESSAGE_MAP()

I need to get data from the Listbox to DialobBox class. looking for help.

Answer 1

Try this. I can see it working with these changes below.

BOOL CGenericPopup::iCreatePopup(CButton* pParent)
{
    m_pParent = pParent;

    // Get the class name and create the window
    CString szClassName = AfxRegisterWndClass(CS_CLASSDC | CS_SAVEBITS | CS_HREDRAW | CS_VREDRAW,0,NULL,0);

    CRect rcBtn;
    pParent->GetWindowRect(rcBtn);

    if (!CWnd::CreateEx(WS_EX_PALETTEWINDOW, szClassName, _T(""), WS_POPUP, rcBtn.right, rcBtn.bottom, 400, 200, pParent->GetSafeHwnd(), 0, NULL))
        return FALSE;



        m_listBox = new MyListBox;
        m_listBox->Create(WS_CHILD | WS_VISIBLE | WS_BORDER | LBS_NOTIFY, CRect(0, 0, 100, 120), this, 1);
        m_listBox->AddString(L"One");
        m_listBox->AddString(L"Two");
        m_listBox->AddString(L"Three");
        m_listBox->SetFont(pParent->GetFont());
        m_listBox->SetFocus();


    ShowWindow(SW_SHOWNA);

    // Capture all mouse events for the listbox
    if (m_listBox)
        m_listBox->SetCapture();

    return TRUE;
}
//---------- MYListBox.cpp ------
BEGIN_MESSAGE_MAP(MyListBox, CListBox)
    ON_CONTROL_REFLECT(LBN_SELCHANGE, &MyListBox::OnLbnSelchange)
END_MESSAGE_MAP()


void MyListBox::OnLbnSelchange()
{
    // TODO: Add your control notification handler code here
    int index = GetCurSel();
    CString str;
    GetText(index, str);
    //CString msg;
    //msg.Format(L"item select: %s", str);
    //::AfxMessageBox(msg);
}


LRESULT MyListBox::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{


    // TODO: Add your specialized code here and/or call the base class
    if (message == WM_LBUTTONUP )
    {
        int xPos = GET_X_LPARAM(lParam);
        int yPos = GET_Y_LPARAM(lParam);
        CPoint pt(xPos, yPos);
        ClientToScreen(&pt);

        CRect rc;
        GetWindowRect(rc);

        if (!rc.PtInRect(pt))
        {
            ReleaseCapture();
            GetParent()->DestroyWindow();
            return 1;
        }
    }
    else if (message == WM_KEYDOWN && wParam == VK_ESCAPE)
    {
        ReleaseCapture();
        GetParent()->DestroyWindow();
        return 1;
    }
    else if (message == WM_CAPTURECHANGED)
    {
        SetCapture();
    }

    return CListBox::WindowProc(message, wParam, lParam);

}

Answer 2

1.Create a dialog with no borders and Popup Style in your resource editor.
2.Add a listbox inside the dialog and make its edges flush with the edges of the dialog.

IDD_DIALOG1 DIALOGEX 0, 0, 133, 129
STYLE DS_SETFONT | DS_FIXEDSYS | WS_POPUP | WS_SYSMENU
FONT 8, "MS Shell Dlg", 400, 0, 0x1
BEGIN
    LISTBOX         IDC_LIST1,0,0,133,129,LBS_SORT | LBS_NOINTEGRALHEIGHT | WS_VSCROLL | WS_TABSTOP
END

3. Create a dialog class for this IDD_DIALOG1, say for eg. PopupDlg and add the following message handler.

BEGIN_MESSAGE_MAP(PopupDlg, CDialogEx)
    ON_LBN_SELCHANGE(IDC_LIST1, OnSelChange)
END_MESSAGE_MAP()


void PopupDlg::OnSelChange()
{
    // TODO: Add your control notification handler code here

}

4. When you want to show this popup, simply create the modeless dialog and manage its positioning and lifecycle.

-SM

Answer 3

thanks for your reply. well, yes. it might work well. But I am looking for Some Message Map or any subclass windows or any win32 way to do it.

want to learn runtime dynamic creating control.

Answer 4

There is a sample that I had uploaded in this thread : https://social.msdn.microsoft.com/Forums/sqlserver/en-US/c6fb4983-7110-4464-bc6a-7b73ce28f224/how-to-create-popup-listbox?forum=vcgeneral

sample link here:
https://1drv.ms/u/s!AsUFbfkvUEyfjVNbQygstiu_Qb3X

-SM

Answer 5

yes, I have that sample. and I follow it.
in that code sample

BEGIN_MESSAGE_MAP(MyListCtrl, CListCtrl)
    ON_NOTIFY_REFLECT(LVN_ITEMCHANGED, &MyListCtrl::OnLvnItemchanged)
END_MESSAGE_MAP()

what is for ListBox? when I use the same in ListBox it does not work. and how to use it.

here is my MessageMap

BEGIN_MESSAGE_MAP(x_ListBox, CListBox)
    ON_WM_DRAWITEM_REFLECT()
    ON_WM_MEASUREITEM_REFLECT()
    ON_WM_COMPAREITEM_REFLECT()
     ON_NOTIFY_REFLECT(LVN_ITEMCHANGED, &x_ListBox::OnLbnSelchange)
END_MESSAGE_MAP()

thanks for your help