void MoveToPreviousPage()
{
controller.MoveToPreviousPage();
Widget widget = GetWidgetToDisplay();
widget.ShowAll();
centreVBox.Remove(centreVBox.Children [0]);
centreVBox.PackStart(widget, true, true, 0);
FocusWidget(widget);
topBannerLabel.Text = controller.BannerText;
previousButton.Sensitive = controller.CanMoveToPreviousPage;
nextButton.Label = controller.NextButtonText;
CanMoveToNextPage = controller.CanMoveToNextPage;
}
