internal BubblesTask(BubblesTaskType taskType, bool isUndo, Func <IEnumerable <BubbleViewModel> > getBubbles, Action complete)
{
this.TaskType = taskType;
this.IsUndo = isUndo;
_getBubbles = getBubbles;
this.Complete = complete;
}
static Duration CalculateDuration(
BubblesTaskType taskType,
BubbleViewModel bubble,
int millisecondsPerUnit)
{
int totalMilliseconds;
switch (taskType)
{
case BubblesTaskType.Burst:
totalMilliseconds = millisecondsPerUnit;
break;
case BubblesTaskType.MoveDown:
totalMilliseconds = millisecondsPerUnit * Math.Abs(bubble.Row - bubble.PreviousRow);
break;
case BubblesTaskType.MoveRight:
totalMilliseconds = millisecondsPerUnit * Math.Abs(bubble.Column - bubble.PreviousColumn);
break;
default:
throw new ArgumentException("Unrecognized BubblesTaskType value: " + taskType, "taskType");
}
return(new Duration(TimeSpan.FromMilliseconds(totalMilliseconds)));
}
BubblesTask CreateTask(BubblesTaskType taskType, BubbleViewModel[] bubblesInGroup)
{
Func <IEnumerable <BubbleViewModel> > getBubbles;
Action complete;
switch (taskType)
{
case BubblesTaskType.Burst:
getBubbles = delegate
{
_bubbleMatrix.IsIdle = false;
return(bubblesInGroup);
};
complete = delegate
{
foreach (BubbleViewModel bubble in bubblesInGroup)
{
_bubbleMatrix.RemoveBubble(bubble);
}
};
break;
case BubblesTaskType.MoveDown:
getBubbles = delegate
{
return(this.MoveNeighboringBubblesDown(bubblesInGroup));
};
complete = delegate
{
/* Nothing to do here. */
};
break;
case BubblesTaskType.MoveRight:
getBubbles = delegate
{
return(this.MoveBubblesRight());
};
complete = delegate
{
_bubbleMatrix.IsIdle = true;
_bubbleMatrix.TryToEndGame();
};
break;
default:
throw new ArgumentException("Unrecognized task type: " + taskType);
}
return(new BubblesTask(taskType, false, getBubbles, complete));
}
/// <summary>
/// Creates a sequence of tasks that must be performed for the
/// specified collection of bubbles.
/// </summary>
/// <param name="bubblesInGroup">The bubbles for which tasks are created.</param>
internal IEnumerable <BubblesTask> CreateTasks(BubbleViewModel[] bubblesInGroup)
{
var taskTypes = new BubblesTaskType[]
{
BubblesTaskType.Burst,
BubblesTaskType.MoveDown,
BubblesTaskType.MoveRight
};
// Dump the tasks into an array so that the query is not executed twice.
return
((from taskType in taskTypes
select this.CreateTask(taskType, bubblesInGroup))
.ToArray());
}
static bool IsTaskStaggered(BubblesTaskType taskType)
{
return(taskType != BubblesTaskType.Burst);
}