public PagingView(IPagingViewModel viewModel)
{
InitializeComponent();
viewModel.SetParentView(this);
DataContext = viewModel;
}
private static void ViewModel_Changed(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
IPageInfo pageInfo = d as IPageInfo;
if (pageInfo == null)
{
return;
}
IPagingViewModel vm = e.OldValue as IPagingViewModel;
if (vm != null)
{
pageInfo.UnNotifyOn("PageCount");
pageInfo.UnNotifyOn("CurrentPageRect");
}
vm = e.NewValue as IPagingViewModel;
if (vm != null)
{
pageInfo.NotifyOn("PageCount", (newValue, oldValue) =>
{
vm.TotalPages = (int)newValue;
if (vm.TotalPages > 0)
{
vm.RestoreSelection();
}
});
pageInfo.NotifyOn("CurrentPageRect", (newValue, oldValue) =>
{
Rect rect = (Rect)newValue;
if (rect.IsEmpty)
{
return;
}
vm.PageWidth = rect.Width;
vm.PageLeft = rect.Left;
});
var binding = new Binding("CurrentPage")
{
Source = vm,
Mode = BindingMode.TwoWay
};
BindingOperations.SetBinding(d, VirtualizingSmartPanel.CurrentPageProperty, binding);
var element = d as FrameworkElement;
if (element != null)
{
element.Unloaded += (sender, args) =>
{
BindingOperations.ClearBinding((DependencyObject)sender, VirtualizingSmartPanel.CurrentPageProperty);
};
}
}
}
/// <summary>
/// Sets the view model.
/// </summary>
/// <param name="obj">The dependency object.</param>
/// <param name="value">The value.</param>
public static void SetViewModel(DependencyObject obj, IPagingViewModel value)
{
obj.SetValue(ViewModelProperty, value);
}
/// <summary>
/// Sets the view model.
/// </summary>
/// <param name="obj">The dependency object.</param>
/// <param name="value">The value.</param>
public static void SetViewModel(DependencyObject obj, IPagingViewModel value)
{
obj.SetValue(ViewModelProperty, value);
}