internal void AddPreviousMessages(IEnumerable <ChatMessageViewModel> messages)
{
bool hasUpdates = false;
_messages.IsNotifying = false;
foreach (var chatMessage in messages.Reverse())
{
chatMessage.HasBeenSeen = true;
var firstMessageGroup = _messages.FirstOrDefault() as ChatMessageGroupViewModel;
if (firstMessageGroup == null || !firstMessageGroup.TryAddPreviousMessage(chatMessage))
{
var groupMessage = new ChatMessageGroupViewModel(chatMessage);
_messages.Insert(0, groupMessage);
hasUpdates = true;
}
}
_messages.IsNotifying = true;
if (hasUpdates)
{
_messages.Refresh();
}
IsRequestingPreviousMessages = false;
}
internal void UserLeft(UserViewModel user)
{
RoomUserViewModel leftUser = _users.FirstOrDefault(x => x.User.Equals(user));
if (leftUser != null)
{
_users.Remove(leftUser);
}
// TODO: Implement notification to the room of left user.
}
private void UpdateTraceWatchers()
{
var activeTrace = TraceWatchers.FirstOrDefault(t => t.IsChecked);
foreach (var tw in TraceWatchers)
{
tw.CheckEnabled(ActiveDocument, activeTrace);
}
}