/// <summary>
/// Adds the given <paramref name="task"/> to the list of currently loading tasks.
/// </summary>
/// <param name="task"><see cref="IReportProgress"/> to add to the loading list.</param>
public virtual void ShowLoading(IReportProgress task)
{
task.Completed += OnLoadingTaskCompleted;
task.ProgressChanged += OnLoadingTaskProgressed;
IsCompleted = false;
lock (_loadingReportablesLock)
{
RunningProgressReportables.Add(task);
}
UpdateLoadingStatus();
}
private void CleanupCompletedTasks()
{
lock (_loadingReportablesLock)
{
foreach (var item in RunningProgressReportables.Where(x => x.IsCompleted).ToList())
{
item.Completed -= OnLoadingTaskCompleted;
item.ProgressChanged -= OnLoadingTaskProgressed;
RunningProgressReportables.Remove(item);
}
if (RunningProgressReportables.Count == 0)
{
IsCompleted = true;
IsIndeterminate = false;
Progress = 1;
Message = Properties.Resources.UI_Ready;
Completed?.Invoke(this, new EventArgs());
}
}
}
private void UpdateLoadingStatus()
{
bool requiresCleanup = false;
lock (_loadingStatusLock)
{
lock (_loadingReportablesLock)
{
// Update progress and determinancy
if (RunningProgressReportables.Any(x => x.IsIndeterminate))
{
IsIndeterminate = true;
if (RunningProgressReportables.Count > 1)
{
Message = Properties.Resources.UI_LoadingGeneric;
}
else
{
Message = RunningProgressReportables.First().Message;
}
}
else
{
IsIndeterminate = false;
if (RunningProgressReportables.Count == 1)
{
Progress = RunningProgressReportables.First().Progress;
}
else if (RunningProgressReportables.Count == 0)
{
// Should be unreachable
Progress = 0;
}
else
{
Progress = RunningProgressReportables.Select(x => x.Progress).Aggregate((x, y) => x * y);
}
// Update message
if (RunningProgressReportables.Count > 1)
{
Message = Properties.Resources.UI_LoadingGeneric;
}
else if (RunningProgressReportables.Count == 0)
{
Message = Properties.Resources.UI_Ready;
}
else
{
Message = RunningProgressReportables.First().Message;
}
}
// Cleanup if needed
if (RunningProgressReportables.Any(x => x.IsCompleted))
{
requiresCleanup = true;
}
}
}
ProgressChanged?.Invoke(this, new ProgressReportedEventArgs {
IsIndeterminate = this.IsIndeterminate, Message = this.Message, Progress = this.Progress
});
if (requiresCleanup)
{
CleanupCompletedTasks();
}
}
