private void InitVirtualizationStrategy(VirtualizationStrategyDefinition definition)
{
if (definition == null)
{
throw new ArgumentNullException("VirtualizationStrategyDefinition");
}
this.RecycleAllItems();
this.ClearReycledItems();
if (this.virtualizationStrategyDefinition != null)
{
this.UpdateStrategyDefinitionPropertyChangedHandling(false);
this.virtualizationStrategy.ResetOwner();
}
this.virtualizationStrategyDefinition = definition;
this.virtualizationStrategy = this.virtualizationStrategyDefinition.CreateStrategy();
this.virtualizationStrategy.InitializeOwner(this);
if (this.IsLoaded)
{
this.UpdateStrategyDefinitionPropertyChangedHandling(true);
}
this.ResetScrollViewer();
this.InvalidateMeasure();
this.InvalidateArrange();
this.ScheduleAsyncBalance();
this.BeginAsyncBalance();
}
internal virtual void OnVirtualizationStrategyDefinitionChanged(DependencyPropertyChangedEventArgs args)
{
VirtualizationStrategyDefinition definition = (VirtualizationStrategyDefinition)args.NewValue;
this.InitVirtualizationStrategy(definition);
}
