wxGrid woes (wxGrid::SetCellSize(), disabling cells, wxGridCellChoiceEditor, native controls)

[Volker Bartheld]

Hi!

I want to disable a certain range of colums in one row of a wxGrid and
later re-enable them. In disabled state "Disabled" should be written in
grey across all disabled colums, later the original
editors/renderers/values should be restored - see the example attached
below.

It seems that
1) the cell attributes and values of the spanned/combined cells (with
SetCellSize) are not restored after unspanning/uncombining them. In the
example, cells 2-3 in row 0 are still empty, readonly and don't have
their wxGridCellChoiceEditor back.
2) If the cell in row 0/colum 1 shows its native editor (the combobox)
while it gets spanned/disabled, the editor stays in place.

Is there anything I can do about this? I'm using wxMSW2.8.0.

Thanks a lot for your help,

Volker

<gridtest.cpp>
 #include <wx/wx.h>
 #include <wx/grid.h>
 #include <wx/timer.h>
 #include <stdlib.h>
 
 static const wxString sOptions[] = { wxT("One"), wxT("Two"), wxT("Three") };
 enum tTIMER_IDS { eTIMER_COMBINE=0x01, eTIMER_SEPARATE };
 class MyDialog : public wxDialog
 {
 public:
   enum tDLG_IDS { ID_BUTTON=wxID_HIGHEST+1, ID_GRID };
   MyDialog::MyDialog() : wxDialog(NULL, wxID_ANY, wxT("wxGrid"), wxDefaultPosition, wxDefaultSize, wxDEFAULT_DIALOG_STYLE)
   {
     wxBoxSizer *pSizerV=new wxBoxSizer( wxVERTICAL );
     wxGrid* pGrid=new wxGrid(this, ID_GRID, wxDefaultPosition, wxSize(500, 256));
     pGrid->CreateGrid(8, 4, wxGrid::wxGridSelectRows);
     pGrid->SetColLabelValue(0, wxT("Options"));
     for(int j=1; j<pGrid->GetNumberCols(); ++j)
     {
       pGrid->SetColLabelValue(j, wxString::Format(wxT("Value %i"), j-1));
       for(int i=0; i<pGrid->GetNumberRows(); ++i)
       {
         if(1==j)
         {
           pGrid->SetCellValue(i, 0, wxString::Format(wxT("%i"), i));
           pGrid->SetCellAlignment(i, 0, wxALIGN_LEFT, wxALIGN_CENTRE);
           pGrid->SetReadOnly(i, 0);
         }
         pGrid->SetCellRenderer(i, j, new wxGridCellStringRenderer());
         pGrid->SetCellEditor(i, j, new wxGridCellChoiceEditor(WXSIZEOF(sOptions), sOptions));
         pGrid->SetCellValue(i, j, sOptions[rand()*WXSIZEOF(sOptions)/RAND_MAX]);
       }
     }
     pSizerV->Add(pGrid);
     SetSizer(pSizerV);
     pSizerV->SetSizeHints(this);
 
     m_timer1=new wxTimer(this, eTIMER_COMBINE);   m_timer1->Start(5000, true);
     m_timer2=new wxTimer(this, eTIMER_SEPARATE);  m_timer2->Start(10000, true);
   }
   void MyDialog::OnClose(wxCloseEvent&) { delete m_timer1; delete m_timer2; Destroy(); }
   void MyDialog::OnTimer(wxTimerEvent& evt)
   {
     wxGrid* pGrid;
     switch(evt.GetId())
     {
     case eTIMER_COMBINE:
       pGrid=(wxGrid*)FindWindow(ID_GRID);
       pGrid->SetCellSize(0, 1, 1, 3);
       pGrid->SetReadOnly(0, 1);
       pGrid->SetCellValue(wxT("Disabled"), 0, 1);
       pGrid->SetCellTextColour(0, 1, wxSystemSettings::GetColour(wxSYS_COLOUR_GRAYTEXT));
       pGrid->SetCellAlignment(0, 1, wxALIGN_CENTRE, wxALIGN_CENTRE);
       pGrid->ForceRefresh();
       break;
     case eTIMER_SEPARATE:
       pGrid=(wxGrid*)FindWindow(ID_GRID);
       pGrid->SetCellSize(0, 1, 1, 1);
       pGrid->SetReadOnly(0, 1, false);
       pGrid->SetCellValue(sOptions[0], 0, 1);
       pGrid->SetCellTextColour(0, 1, wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));
       pGrid->SetCellAlignment(0, 1, wxALIGN_LEFT, wxALIGN_CENTRE);
       pGrid->ForceRefresh();
       break;
     default: evt.Skip(); break;
     }
   }
   wxTimer *m_timer1, *m_timer2;
   DECLARE_EVENT_TABLE()
 };
 BEGIN_EVENT_TABLE(MyDialog,wxDialog)
 EVT_CLOSE(MyDialog::OnClose)
 EVT_TIMER(wxID_ANY, MyDialog::OnTimer)
 END_EVENT_TABLE()
 
 class MyApp: public wxApp
 {
 public:
   bool MyApp::OnInit()
   {
     MyDialog* TheDialog=new MyDialog();
     TheDialog->Show();
     return true;
   }
 };
 IMPLEMENT_APP(MyApp)
</gridtest.cpp>

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