private void UpdateItemsVisualState()
{
if (this.itemsPanel != null)
{
this.StopInertia();
VisualStateUpdateParams updateParams = new VisualStateUpdateParams(true);
this.UpdateItemsVisualState(updateParams);
}
}
/// <summary>
/// Forces each visual item to update its state.
/// </summary>
internal void UpdateItemsVisualState(VisualStateUpdateParams updateParams)
{
if (!this.isInitialized)
{
return;
}
if (this.itemsPanel != null)
{
foreach (LoopingListItem item in this.itemsPanel.Children)
{
this.UpdateItemVisualState(item, updateParams);
}
}
}
/// <summary>
/// Updates the visual state of a single item.
/// </summary>
/// <param name="item">The <see cref="LoopingListItem"/> instance which state is to be updated.</param>
/// <param name="updateParams">The structure that encapsulates different update parameters such as Animate, EvaluateEnabled, etc.</param>
internal virtual void UpdateItemVisualState(LoopingListItem item, VisualStateUpdateParams updateParams)
{
if (item.IsEmpty)
{
return;
}
int logicalIndex = item.LogicalIndex;
item.BeginVisualStateUpdate();
if (updateParams.EvaluateEnabled)
{
item.IsEnabled = this.IsItemEnabled(logicalIndex);
}
if (updateParams.EvaluateSelected)
{
item.IsSelected = this.IsItemSelected(logicalIndex);
}
item.EndVisualStateUpdate(true, updateParams.Animate);
}
