Fix dataview sample compilation with wxUSE_DRAG_AND_DROP==0.

This allows to build it under wxX11. Unfortunately it still doesn't work at
all there.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65213 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/dataview/dataview.cpp

@@ -123,9 +123,11 @@ private:
     void OnHideAttributes( wxCommandEvent &event);
     void OnShowAttributes( wxCommandEvent &event);
 
+#if wxUSE_DRAG_AND_DROP
     void OnBeginDrag( wxDataViewEvent &event );
     void OnDropPossible( wxDataViewEvent &event );
     void OnDrop( wxDataViewEvent &event );
+#endif // wxUSE_DRAG_AND_DROP
 
     void OnDataViewChar(wxKeyEvent& event);
 
@@ -345,9 +347,11 @@ BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 
     EVT_DATAVIEW_ITEM_CONTEXT_MENU(ID_MUSIC_CTRL, MyFrame::OnContextMenu)
 
+#if wxUSE_DRAG_AND_DROP
     EVT_DATAVIEW_ITEM_BEGIN_DRAG( ID_MUSIC_CTRL, MyFrame::OnBeginDrag )
     EVT_DATAVIEW_ITEM_DROP_POSSIBLE( ID_MUSIC_CTRL, MyFrame::OnDropPossible )
     EVT_DATAVIEW_ITEM_DROP( ID_MUSIC_CTRL, MyFrame::OnDrop )
+#endif // wxUSE_DRAG_AND_DROP
 
     EVT_RIGHT_UP(MyFrame::OnRightClick)
     
@@ -522,8 +526,10 @@ void MyFrame::BuildDataViewCtrl(wxPanel* parent, unsigned int nPanel, unsigned l
             m_music_model = new MyMusicTreeModel;
             m_ctrl[0]->AssociateModel( m_music_model.get() );
 
+#if wxUSE_DRAG_AND_DROP
             m_ctrl[0]->EnableDragSource( wxDF_UNICODETEXT );
             m_ctrl[0]->EnableDropTarget( wxDF_UNICODETEXT );
+#endif // wxUSE_DRAG_AND_DROP
 
             // column 0 of the view control:
 
@@ -802,6 +808,8 @@ void MyFrame::OnAbout( wxCommandEvent& WXUNUSED(event) )
 // MyFrame - event handlers for the first page
 // ----------------------------------------------------------------------------
 
+#if wxUSE_DRAG_AND_DROP
+
 void MyFrame::OnBeginDrag( wxDataViewEvent &event )
 {
     wxDataViewItem item( event.GetItem() );
@@ -854,6 +862,8 @@ void MyFrame::OnDrop( wxDataViewEvent &event )
     wxLogMessage( "Text dropped: %s", obj.GetText() );
 }
 
+#endif // wxUSE_DRAG_AND_DROP
+
 void MyFrame::OnAddMozart( wxCommandEvent& WXUNUSED(event) )
 {
     m_music_model->AddToClassical( "Eine kleine Nachtmusik", "Wolfgang Mozart", 1787 );