/// <summary>
/// Checks whether columns can be restored.
/// </summary>
/// <param name="subject">Target ManagementList.</param>
/// <param name="callback">RetryActionAfterLoaded callback method.</param>
/// <returns>True iff columns restorable.</returns>
/// <exception cref="InvalidOperationException">
/// ManagementList.AutoGenerateColumns not supported.
/// </exception>
private static bool VerifyColumnsRestorable(ManagementList subject, RetryActionCallback <ManagementList> callback)
{
if (WpfHelp.RetryActionAfterLoaded <ManagementList>(subject, callback, subject))
{
return(false);
}
if (WpfHelp.RetryActionAfterLoaded <ManagementList>(subject.List, callback, subject))
{
return(false);
}
if (subject.List == null)
{
return(false);
}
// Columns are not savable/restorable if AutoGenerateColumns is true.
if (subject.List.AutoGenerateColumns)
{
throw new InvalidOperationException("View Manager is not supported when AutoGenerateColumns is set.");
}
return(true);
}
private static bool VerifyColumnsSavable(ManagementList subject, RetryActionCallback <ManagementList> callback)
{
if (!VerifyColumnsRestorable(subject, callback))
{
return(false);
}
if (subject.List.InnerGrid == null)
{
return(false);
}
return(true);
}
/// <summary>
/// Calls a method when the Loaded event is fired on a FrameworkElement.
/// </summary>
/// <typeparam name="T">The type of the parameter to pass to the callback method.</typeparam>
/// <param name="element">The element whose Loaded state we are interested in.</param>
/// <param name="callback">The method we will call if element.IsLoaded is false.</param>
/// <param name="parameter">The parameter to pass to the callback method.</param>
/// <returns>
/// Returns true if the element is not loaded and the callback will be called
/// when the element is loaded, false otherwise.
/// </returns>
public static bool RetryActionAfterLoaded <T>(FrameworkElement element, RetryActionCallback <T> callback, T parameter)
{
if (element.IsLoaded)
{
return(false);
}
RetryActionAfterLoadedDataQueue data;
if (!retryActionData.TryGetValue(element, out data))
{
data = new RetryActionAfterLoadedDataQueue();
retryActionData.Add(element, data);
}
data.Enqueue(callback, parameter);
element.Loaded += new RoutedEventHandler(Element_Loaded);
element.ApplyTemplate();
return(true);
}
private static bool VerifyRulesSavableAndRestorable(ManagementList subject, RetryActionCallback <ManagementList> callback)
{
if (WpfHelp.RetryActionAfterLoaded <ManagementList>(subject, callback, subject))
{
return(false);
}
if (subject.AddFilterRulePicker == null)
{
return(false);
}
if (subject.FilterRulePanel == null)
{
return(false);
}
if (subject.SearchBox == null)
{
return(false);
}
return(true);
}
