ReportSampleView as an MDI window

Hello Colin,

The main idea could be to make Field Chooser and Filter Edit dialogs as singletons for the application. It could be done via using static pointers in your view. You'd also have to change dialogs initialization code inside OnInitialUpdate method.

Also you have to catch OnActivateView event -- this would allow you to force both dialogs to work with the currently active view.

Take a look at the sample code below:

// h-File
//////////////////////////////////////////////////////////// //////////////
class CReportSampleView : public CView
{
     
protected:
     static CXTPReportSubListControl* ms_pWndSubList;
     static CXTPReportFilterEditControl* ms_pWndFilterEdit;
     static int s_nViewsCount;
    // ... other declarations
};

// cpp-File
/// //////////////////////////////////////////////////////////// //////////////
CXTPReportSubListControl* CReportSampleView::ms_pWndSubList = NULL;
CXTPReportFilterEditControl* CReportSampleView::ms_pWndFilterEdit = NULL;
int CReportSampleView::s_nViewsCount = 0;    

// CReportSampleView construction/destruction
CReportSampleView::CReportSampleView()
{
    s_nViewsCount++;
}

CReportSampleView::~CReportSampleView()
{
    s_nViewsCount--;
    ASSERT(s_nViewsCount >=0);
    if(s_nViewsCount == 0)
    {
        if(ms_pWndSubList) {
               ms_pWndSubList->UnsubclassWindow();
               delete ms_pWndSubList;
               ms_pWndSubList = NULL;
        }
        if(ms_pWndFilterEdit) {
               ms_pWndFilterEdit->UnsubclassWindow();
               delete ms_pWndFilterEdit;
               ms_pWndFilterEdit = NULL;
        }
    }
}

void CReportSampleView::OnInitialUpdate()
{
     CView::OnInitialUpdate();
     
     CMainFrame* pWnd = (CMainFrame*)AfxGetMainWnd();

     // Init CXTPReportSubListControl
    if (!ms_pWndSubList)
    {
        ms_pWndSubList = new CXTPReportSubListControl();
        if (!ms_pWndSubList)
                  return;
              
             if (!::IsWindow(ms_pWndSubList->GetSafeHwnd()))
             {
                  ms_pWndSubList->SubclassDlgItem(IDC_COLUMNLIST, &pWnd->m_wndFieldChooser);
                  m_wndReport.GetColumns()->G etReportHeader()->SetSubListCtrl(ms_pWndSubList);
              }
             ms_pWndSubList->SetReportCtrl(&m_wndReport);
     }      ;
     // Init CXTPReportFilterEditControl in the same way as above with CXTPReportSubListControl
     // ...
     
     
}

void CReportSampleView::OnActivateView(BOOL bActivate, CView* pActivateView, CView* pDeactiveView)
{
     if(bActivate)
     {
        if (ms_pWndSubList)
         {
                  ms_pWndSubList->ResetContent();
                  ms_pWndSubList->SetReportCtrl(&m_wndReport);
         }
         if (ms_pWndFilterEdit)
                  ms_pWndFilterEdit->SetReportCtrl(&m_wndReport);
    }     
     
    CView::OnActivateView(bActivate, pActivateView, pDeactiveView);
}


--
Best regards,
Sergey

Edited by sserge

Hi Colin,

Try resetting Field Chooser contents firstly in OnActivateView:

     if(bActivate)
     {
         if (ms_pWndSubList)
           {
                ms_pWndSubList->ResetConten t();
                ms_pWndSubList->SetReportCt rl(&m_wndReport);
           }
......

That should help.

--
Best regards,
Sergey

Hi Colin,

Yep, my solution missed one more thing -- when the last view is closing and we are deleting Field Chooser object inside the View destructor, we should also Unsubclass subclassed window :) So, this piece of code in CReportSampleView::~CReportSampleView() will look in the following way:
.....
           if(ms_pWndSubList) {
                ms_pWndSubList->UnsubclassW indow();
                delete ms_pWndSubList;
                ms_pWndSubList = NULL;
           }
......

And the same for Filter Edit window.

--
Best regards,
Sergey