private async Task ScanAsync()
{
var isEntered = false;
try
{
isEntered = (Interlocked.Increment(ref _scanCount) == 1);
if (isEntered)
{
ScanningChanged?.Invoke(this, true);
var scanTime = DateTimeOffset.Now;
await Task.Run(() =>
{
var oldMonitors = Monitors.ToList();
foreach (var item in MonitorManager.EnumerateMonitors())
{
var oldMonitor = oldMonitors.FirstOrDefault(x =>
string.Equals(x.DeviceInstanceId, item.DeviceInstanceId, StringComparison.OrdinalIgnoreCase));
if (oldMonitor != null)
{
oldMonitors.Remove(oldMonitor);
item.Dispose();
continue;
}
var newMonitor = new MonitorViewModel(item);
RetrieveName(newMonitor);
if (Monitors.Count < _maxMonitorCount.Value)
{
newMonitor.UpdateBrightness();
newMonitor.IsTarget = true;
}
lock (_monitorsLock)
{
Monitors.Add(newMonitor);
}
}
foreach (var oldMonitor in oldMonitors)
{
oldMonitor.Dispose();
lock (_monitorsLock)
{
Monitors.Remove(oldMonitor);
}
}
});
await Task.WhenAll(Monitors
.Take(_maxMonitorCount.Value)
.Where(x => x.UpdateTime < scanTime)
.Select(x => Task.Run(() =>
{
x.UpdateBrightness();
x.IsTarget = true;
})));
}
}
finally
{
if (isEntered)
{
ScanningChanged?.Invoke(this, false);
Interlocked.Exchange(ref _scanCount, 0);
}
}
}
private async Task ScanAsync()
{
var isEntered = false;
try
{
isEntered = (Interlocked.Increment(ref _scanCount) == 1);
if (isEntered)
{
ScanningChanged?.Invoke(this, true);
var scanTime = DateTimeOffset.Now;
int accessibleMonitorCount = 0;
await Task.Run(() =>
{
var oldMonitorIndices = Enumerable.Range(0, Monitors.Count).ToList();
var newMonitorItems = new List <IMonitor>();
foreach (var item in MonitorManager.EnumerateMonitors())
{
var isExisting = false;
foreach (int index in oldMonitorIndices)
{
var oldMonitor = Monitors[index];
if (string.Equals(oldMonitor.DeviceInstanceId, item.DeviceInstanceId, StringComparison.OrdinalIgnoreCase) &&
(oldMonitor.IsAccessible == item.IsAccessible))
{
isExisting = true;
oldMonitorIndices.Remove(index);
item.Dispose();
break;
}
}
if (!isExisting)
{
newMonitorItems.Add(item);
}
}
if (oldMonitorIndices.Count > 0)
{
oldMonitorIndices.Reverse(); // Reverse indices to start removing from the tail.
foreach (var index in oldMonitorIndices)
{
Monitors[index].Dispose();
lock (_monitorsLock)
{
Monitors.RemoveAt(index);
}
}
}
if (newMonitorItems.Count > 0)
{
foreach (var item in newMonitorItems)
{
var newMonitor = new MonitorViewModel(this, item);
if (newMonitor.IsControllable && (Monitors.Count < _maxMonitorCount.Value))
{
newMonitor.UpdateBrightness();
newMonitor.IsTarget = true;
accessibleMonitorCount++;
}
lock (_monitorsLock)
{
Monitors.Add(newMonitor);
}
}
}
});
await Task.WhenAll(Monitors
.Take(_maxMonitorCount.Value)
.Where(x => x.IsControllable && (x.UpdateTime < scanTime))
.Select(x => Task.Run(() =>
{
x.UpdateBrightness();
x.IsTarget = true;
Interlocked.Increment(ref accessibleMonitorCount);
})));
var accessibleMonitorExists = (accessibleMonitorCount > 0);
Monitors
.Where(x => !x.IsControllable)
.ToList()
.ForEach(x => x.IsTarget = !accessibleMonitorExists);
}
}
finally
{
if (isEntered)
{
ScanningChanged?.Invoke(this, false);
Interlocked.Exchange(ref _scanCount, 0);
}
}
}