private Aid waitingAid; //aid waiting to be lasered
#endregion Fields
#region Constructors
private LaserMarker()
{
this.laserHardware = null;
this.state = LaserMarkerState.WaitingForWork;
//handle AidsQueueUpdated event
AidQueue aidQueue = AidQueue.Instance;
aidQueue.AidAdded += new EventHandler(AidsQueueUpdated);
this.waitingAid = null;
}
/// <summary>
/// Called when hardware status changes
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void HardwareDoorChanged(object sender, DoorChangedEventArgs e)
{
if (e.Status == LaserHardwareDoorStatus.Closed)
{
//door now closed
if (this.waitingAid != null)
{
//there is a waiting aid so mark it
LaserMarkResult result = this.laserHardware.Mark(this.waitingAid.Model.Name, this.waitingAid.SerialText, this.waitingAid.ModelText);
if (result == LaserMarkResult.Success)
{
//mark successfull
this.waitingAid = null;
if (AidQueue.Instance.PeekHeadAid() == null)
{
this.state = LaserMarkerState.WaitingForWork;
}
else
{
this.state = LaserMarkerState.WaitingForDoorOpen;
}
this.StateModified();
}
else
{
//mark unsuccessfull
if (this.MarkFailed != null)
{
MarkFailAction action = this.MarkFailed(this, new MarkFailEventArgs(result));
if (action == MarkFailAction.Cancel)
{
//mark canceled, remove aid
this.waitingAid = null;
if (AidQueue.Instance.PeekHeadAid() == null)
{
this.state = LaserMarkerState.WaitingForWork;
}
else
{
this.state = LaserMarkerState.WaitingForDoorOpen;
}
}
else
{
//retry mark
this.state = LaserMarkerState.WaitingForDoorOpen;
}
this.StateModified();
}
}
}
}
else if (e.Status == LaserHardwareDoorStatus.Open)
{
//door now open
if (this.waitingAid == null)
{
//get a new aid to mark
this.waitingAid = AidQueue.Instance.GetHeadAid();
//if there is a aid to mark change state
if (this.waitingAid != null)
this.state = LaserMarkerState.WaitingForDoorClose;
this.StateModified();
}
else
{
//this might happen if mark fails and is retried
if (this.state != LaserMarkerState.WaitingForDoorClose)
{
this.state = LaserMarkerState.WaitingForDoorClose;
this.StateModified();
}
}
}
//door status unknown?
}
/// <summary>
/// Called when Aid added to aid queue
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void AidsQueueUpdated(object sender, EventArgs e)
{
AidQueue aidQueue = AidQueue.Instance;
if (this.waitingAid == null)
{
if (this.laserHardware.GetDoorStatus() == LaserHardwareDoorStatus.Open)
{
this.waitingAid = aidQueue.GetHeadAid();
this.state = LaserMarkerState.WaitingForDoorClose;
}
else
{
//waiting for door to open
this.state = LaserMarkerState.WaitingForDoorOpen;
}
this.StateModified();
}
}
