/// <summary>
/// The method responsible for the filter operation
/// </summary>
private void FilterThreadMethod()
{
//block anew new threads from starting
_filterWorkerEvent.Reset();
//reset the stopRequested flag
_stopRequested = false;
FilterTaskQueue taskQueue = new FilterTaskQueue();
//clear all the rows and re-add them, unfortunately due to performance issues
//in DataGridView we can't just hide rows
_list.Invoke((MethodInvoker) delegate
{
_list.ClearAllRows();
});
TVRequestInfo header;
int currIndex = -1;
//calculate visibility and re-add to the list
while ((header = _list.DataSource.GetNext(ref currIndex)) != null)
{
if (_stopRequested)
{
break;
}
taskQueue.Enqueue(header);
if (taskQueue.Count >= FILTER_EVENTS_QUEUE_SIZE)
{
Display(taskQueue);
}
}
//drain remaining requests
if (taskQueue.Count > 0 && !_stopRequested)
{
Display(taskQueue);
}
//allow new threads to start
_filterWorkerEvent.Set();
}
/// <summary>
/// Starts a display operation
/// </summary>
/// <param name="taskQueue">Queue with request headers that should be added to the list</param>
private void Display(FilterTaskQueue taskQueue)
{
TVRequestInfo currentTask;
_list.Invoke((MethodInvoker) delegate
{
_list.SuspendLayout();
while (taskQueue.Count > 0 && !_stopRequested)
{
currentTask = taskQueue.Dequeue();
_list.AddRow(currentTask, false);
}
_list.ResumeLayout();
if (!_stopRequested)
{
Thread.Sleep(DISPLAY_DELAY); //sleep a bit to allow user interaction with the list
}
});
}
