WxComboBox

From WxWiki

A combobox is a listbox combined with an edit control at the top. Only one item can be selected. There are two other slightly different types of listboxes:

wxChoice: A listbox without an edit control. You can only see the selected item. wxChoice Class Reference

wxListBox: A listbox with an edit control. You can select more than one item and multiple items are visible. wxListBox Class Reference

[edit] Tab Traversal with wxTE_PROCESS_ENTER

Note: If you want to use EVT_TEXT_ENTER(id,func) to receive wxEVT_COMMAND_TEXT_ENTER events, you have to add the wxTE_PROCESS_ENTER window style flag.

If you create a wxComboBox with the flag wxTE_PROCESS_ENTER, the tab key won't jump to the next control anymore. To get the default tab-traversal behaviour back, you have to catch the KEY_DOWN events of the combo box and call Navigate() on the frame.

wxComboBox* box = new wxComboBox(parent, wxID_ANY, _T(""), wxDefaultPosition, wxDefaultSize, 
   0, NULL, wxTE_PROCESS_ENTER | wxTE_PROCESS_TAB);
box->GetEventHandler()->Connect(wxEVT_KEY_DOWN, wxKeyEventHandler(MainFrame::comboTabAction));

void MainFrame::comboTabAction(wxKeyEvent& event)
{
   if (event.GetKeyCode() == WXK_TAB)
      Navigate(wxNavigationKeyEvent::IsForward);
   else
      event.Skip();
}

Perl Code Example:

   ### p__:
   sub CboBoxOnKeyDown {
     my( $this, $event ) = @_;
     ### p__: recognize tabkey in combobox 
     if(000){}
     elsif( $event->GetKeyCode() == ord( "\t" ) ) {        
       my  $oElt   = ($this->GetParent()->GetChildren())[0];
           $oElt->SetFocus();
     } 
     else {
       $event->Skip();
     }
   };

NOTE: The perl example sets focus on a specific control; I could not figure out how to get the Navigate method to work in perl. If you know how, please specify.

Python Code Example (found in wx\lib\calendar.py)

   def OnKeyDown(self, event):
       key_code = event.GetKeyCode()
       if key_code == wx.WXK_TAB:
           forward = not event.ShiftDown()
           ne = wx.NavigationKeyEvent()
           ne.SetDirection(forward)
           ne.SetCurrentFocus(self)
           ne.SetEventObject(self)
           self.GetParent().GetEventHandler().ProcessEvent(ne)
           event.Skip()