private void ScrollToBottomButton_OnClick(object sender, EventArgs e)
{
var _ = OnPressedCachedImage(ScrollToBottomButton);
object last = MessagesListBox.ItemsSource.Cast <object>().LastOrDefault();
if (last is null)
{
return;
}
LoadPreviousMessagesButton.IsVisible = LoadPreviousMessagesButton.IsEnabled = false;
MessagesListBox.ScrollTo(last, ScrollToPosition.Center, (e as ScrollToBottomEventArgs)?.Animated ?? true);
}
private void LoadPreviousMessagesButton_OnClicked(object sender, EventArgs e)
{
object scrollLock = MessagesListBox.ItemsSource.Cast <object>().FirstOrDefault();
if (scrollLock is null)
{
return;
}
if (BindingContext is ActiveConvoViewModel vm)
{
vm.LoadPreviousMessages().ContinueWith(_ =>
{
Device.BeginInvokeOnMainThread(() =>
{
LoadPreviousMessagesButton.IsVisible = LoadPreviousMessagesButton.IsEnabled = false;
MessagesListBox.ScrollTo(scrollLock, ScrollToPosition.Start, false);
});
});
}
}