public bool TrySelectTemplate(object value, out object template)
{
template = null;
if (_templateSelector == null)
{
return(false);
}
template = _templateSelector.SelectTemplate(value, _container);
return(true);
}
internal static object SelectTemplateWithContext(this IDataTemplateSelector selector,
[CanBeNull] object item, [NotNull] object container)
{
object template = selector.SelectTemplate(item, container);
if (template != null && item != null)
{
BindingServiceProvider.ContextManager.GetBindingContext(template).Value = item;
}
return(template);
}
private void OnItemsSourceCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (page == null)
{
return;
}
IDataTemplateSelector selector = ItemTemplateSelector;
if (e.Action == NotifyCollectionChangedAction.Reset)
{
page.Children.Clear();
}
else if (e.Action == NotifyCollectionChangedAction.Add)
{
int idx = e.NewStartingIndex;
foreach (object item in e.NewItems)
{
page.Children.Insert(idx++, CreateTabItemPage(item, selector?.SelectTemplate(item, page)));
}
}
else if (e.Action == NotifyCollectionChangedAction.Remove)
{
foreach (object item in e.OldItems)
{
page.Children.RemoveAt(e.OldStartingIndex);
}
}
else if (e.Action == NotifyCollectionChangedAction.Replace)
{
int idx = e.NewStartingIndex;
foreach (object item in e.NewItems)
{
page.Children[idx++] = CreateTabItemPage(item, selector?.SelectTemplate(item, page));
}
}
else
{
throw new NotSupportedException(e.Action.ToString());
}
}
private static object GetContentInternal(object container, Context ctx, object content, IDataTemplateSelector templateSelector)
{
var template = templateSelector.SelectTemplate(content, container);
if (template is int)
{
return(GetContentInternal(ctx, content, (int)template));
}
if (content != null && (template is View || IsFragment(template)))
{
template.SetDataContext(content);
}
return(template);
}
internal static object SelectTemplateWithContext(this IDataTemplateSelector selector,
[CanBeNull] object item, [NotNull] object container)
{
var template = selector.SelectTemplate(item, container);
if (template != null)
{
template.SetDataContext(item);
if (!(template is Control) && !(template is ToolStripItem) && template.GetBindingMemberValue(AttachedMembersBase.Object.Parent) == null)
{
template.SetBindingMemberValue(AttachedMembersBase.Object.Parent, container);
}
}
return(template);
}
internal static object SelectTemplateWithContext(this IDataTemplateSelector selector,
[CanBeNull] object item, [NotNull] object container)
{
object template = selector.SelectTemplate(item, container);
if (template != null)
{
template.SetDataContext(item);
if (!(template is UIView) &&
template.GetBindingMemberValue(AttachedMembers.Object.Parent, container) == null)
{
template.SetBindingMemberValue(AttachedMembers.Object.Parent, container);
}
}
return(template);
}
private void PerformTabBinding()
{
if (page == null)
{
return;
}
page.Children.Clear();
if (ItemsSource != null)
{
IDataTemplateSelector selector = ItemTemplateSelector;
foreach (object item in ItemsSource)
{
Page pg = CreateTabItemPage(item, selector?.SelectTemplate(item, page));
page.Children.Add(pg);
}
}
}
private void ShowInternal(ToastImpl toast, IDataTemplateSelector selector, View snackbarHolderView, object content, float duration, ToastPosition position, IDataContext context)
{
Snackbar snackbar;
if (selector == null)
{
snackbar = Snackbar.Make(snackbarHolderView, content.ToStringSafe("(null)"), (int)duration);
}
else
{
snackbar = (Snackbar)selector.SelectTemplate(content, snackbarHolderView);
}
if (snackbar == null)
{
toast.FromToast(_defaultPresenter.ShowAsync(content, duration, position, context));
}
else
{
toast.Show(snackbar, duration);
}
}
private static object GetContentInternal(object container, Context ctx, object content, IDataTemplateSelector templateSelector)
{
object template = templateSelector.SelectTemplate(content, container);
var newView = template as View;
if (newView != null)
{
BindingServiceProvider.ContextManager.GetBindingContext(newView).Value = content;
return(newView);
}
if (template is int)
{
return(GetContentInternal(ctx, content, (int)template));
}
#if !API8
var fragment = template as Fragment;
if (fragment != null)
{
BindingServiceProvider.ContextManager.GetBindingContext(fragment).Value = content;
return(fragment);
}
#endif
return(template);
}
private void ShowInternal(ToastImpl toast, IDataTemplateSelector selector, View snackbarHolderView, object content, float duration, ToastPosition position, IDataContext context)
{
Snackbar snackbar;
if (selector == null)
snackbar = Snackbar.Make(snackbarHolderView, content.ToStringSafe("(null)"), (int)duration);
else
snackbar = (Snackbar)selector.SelectTemplate(content, snackbarHolderView);
if (snackbar == null)
toast.FromToast(_defaultPresenter.ShowAsync(content, duration, position, context));
else
toast.Show(snackbar, duration);
}
