private void ToExpandTappedItem(Contact ItemData)
{
if (tappedItem != null && tappedItem.IsVisible)
{
var previousIndex = listview.DataSource.DisplayItems.IndexOf(tappedItem);
tappedItem.IsVisible = false;
if (Device.RuntimePlatform != Device.macOS)
{
Device.BeginInvokeOnMainThread(() => { listview.RefreshListViewItem(previousIndex, previousIndex, false); });
}
}
if (tappedItem == ItemData)
{
if (Device.RuntimePlatform == Device.macOS)
{
var previousIndex = listview.DataSource.DisplayItems.IndexOf(tappedItem);
Device.BeginInvokeOnMainThread(() => { listview.RefreshListViewItem(previousIndex, previousIndex, false); });
}
tappedItem = null;
return;
}
tappedItem = ItemData;
tappedItem.IsVisible = true;
if (Device.RuntimePlatform == Device.macOS)
{
var firstIndex = visibleLines[visibleLines.FirstBodyVisibleIndex].LineIndex;
var lastIndex = visibleLines[visibleLines.LastBodyVisibleIndex].LineIndex;
Device.BeginInvokeOnMainThread(() => { listview.RefreshListViewItem(firstIndex, lastIndex, false); });
}
else
{
var currentIndex = listview.DataSource.DisplayItems.IndexOf(ItemData);
Device.BeginInvokeOnMainThread(() => { listview.RefreshListViewItem(currentIndex, currentIndex, false); });
}
}