- button_sizer->Add( new wxButton( this, ID_PREPEND_LIST, "Prepend"), 0, wxALL, 10 );
- button_sizer->Add( new wxButton( this, ID_DELETE_LIST, "Delete selected"), 0, wxALL, 10 );
- button_sizer->Add( new wxButton( this, ID_GOTO, "Goto 50"), 0, wxALL, 10 );
+ wxFlexGridSizer *grid_sizer = new wxFlexGridSizer( 2, 2 );
+ grid_sizer->Add( new wxButton( this, ID_PREPEND_LIST, "Prepend"), 0, wxALL, 2 );
+ grid_sizer->Add( new wxButton( this, ID_DELETE_LIST, "Delete selected"), 0, wxALL, 2 );
+ grid_sizer->Add( new wxButton( this, ID_GOTO, "Goto 50"), 0, wxALL, 2 );
+ grid_sizer->Add( new wxButton( this, ID_ADD_MANY, "Add 1000"), 0, wxALL, 2 );
+ button_sizer->Add( grid_sizer, 0, wxALL, 10 );