private static void ItemsPanelChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AdaptiveCollectionView obj = (AdaptiveCollectionView)d;
ItemsPanelTemplate value = (ItemsPanelTemplate)e.NewValue;
obj.SetBaseItemsPanel(value);
}
private static async void InternalModeChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AdaptiveCollectionView obj = (AdaptiveCollectionView)d;
AdaptiveCollectionViewMode value = (AdaptiveCollectionViewMode)e.NewValue;
if (Enum.IsDefined(typeof(AdaptiveCollectionViewMode), value) == false)
{
throw new ArgumentException($"{nameof(AdaptiveCollectionViewMode)} is not defined", nameof(value));
}
int index = -1;
if (obj.Items.Count > 0)
{
ItemsStackPanel stackPanel = obj.ItemsPanelRoot as ItemsStackPanel;
if (stackPanel != null)
{
index = stackPanel.FirstVisibleIndex;
}
ItemsWrapGrid wrapGrid = obj.ItemsPanelRoot as ItemsWrapGrid;
if (wrapGrid != null)
{
index = wrapGrid.FirstVisibleIndex;
}
}
if (value == AdaptiveCollectionViewMode.List)
{
obj.ItemsPanel = obj._itemsStackPanel;
}
else
{
obj.ItemsPanel = obj._itemsWrapGrid;
}
if (obj.ModeChanged != null)
{
obj.ModeChanged(obj, new AdaptiveCollectionViewModeChangedEventArgs((AdaptiveCollectionViewMode)e.OldValue, (AdaptiveCollectionViewMode)e.NewValue));
}
await obj.WaitForLayoutUpdatedAsync();
if (obj.SelectedItem != null)
{
obj.ScrollIntoView(obj.SelectedItem, ScrollIntoViewAlignment.Leading);
}
else if (index > -1)
{
var item = obj.Items.ElementAtOrDefault(index);
if (item != null)
{
obj.ScrollIntoView(item, ScrollIntoViewAlignment.Leading);
}
}
}
private static void ItemContainerStyleChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
AdaptiveCollectionView obj = (AdaptiveCollectionView)d;
Style value = (Style)e.NewValue;
if (value != null)
{
if (value.TargetType != typeof(AdaptiveCollectionViewItem))
{
throw new ArgumentException($"the target type of item container style should be {nameof(AdaptiveCollectionViewItem)}", nameof(value));
}
else
{
value.TargetType = typeof(GridViewItem);
}
}
obj.SetBaseItemContainerStyle(value);
}