/// <summary>
/// Gets the item associated with the specified key.
/// </summary>
/// <param name="key">The key of the value to get.</param>
/// <param name="block">When this method returns, contains the item associated with the specified key, if the key is found; otherwise, the default value for the type of the item parameter. This parameter is passed uninitialized.</param>
/// <returns><c>true</c> if the <see cref="GridBlockCollection{TGridBlock}"/> contains an element with the specified key; otherwise, false.</returns>
public bool TryGetItem(ShortPoint key, out TGridBlock block)
{
if (Dictionary != null)
{
return(Dictionary.TryGetValue(key, out block));
}
block = this.FirstOrDefault(b => b.Location == key);
return(block != null);
}
public GridBlock(int blockSize, ShortPoint location, IEqualityComparer <TCell> cellEqualityComparer)
{
if (cellEqualityComparer == null)
{
throw new ArgumentNullException(nameof(cellEqualityComparer));
}
BlockSize = blockSize;
Location = location;
cells = new TCell[BlockSize * BlockSize];
this.cellEqualityComparer = cellEqualityComparer;
}
public TCell this[int x, int y]
{
get
{
CheckLocation(ref x, ref y);
TGridBlock block = null;
ShortPoint blockLocation = default(ShortPoint);
int cellX, cellY;
int blockSize = BlockSize;
GridBlock.GetBlockCellLocation(ref x, ref y, ref blockSize, out blockLocation, out cellX, out cellY);
if (Blocks.TryGetItem(blockLocation, out block))
{
return(block.GetCell(cellX, cellY));
}
return(default(TCell));
}
set
{
CheckLocation(ref x, ref y);
TGridBlock block = null;
ShortPoint blockLocation = default(ShortPoint);
int tileX, tileY;
int blockSize = BlockSize;
GridBlock.GetBlockCellLocation(ref x, ref y, ref blockSize, out blockLocation, out tileX, out tileY);
if (!Blocks.TryGetItem(blockLocation, out block))
{
if (CellEqualityComparer.Equals(value, default(TCell)))
{
return;
}
block = CreateBlock(blockLocation);
AddBlock(block);
}
var currentValue = block.GetCell(tileX, tileY);
if (block.SetCell(tileX, tileY, value))
{
OnCellContentChanged(tileX, tileY, block, currentValue, value);
}
}
}
protected abstract TGridBlock CreateBlock(ShortPoint blockLocation);
