private bool IsValidSlot(TileSlot slot, Tile tile)
{
// flag to explore for adjacent files as we check for
// other failure conditions
bool adjacent = false;
// if the target slot has a tile to the North
// and if that tile has incompatible borders,
// then reject
if (slot.hasN() && slot.N.hasTile())
{
adjacent = true;
if(slot.N.tile.borders.S != tile.borders.N)
return false;
}
if(slot.hasS() && slot.S.hasTile())
{
adjacent = true;
if(slot.S.tile.borders.N != tile.borders.S)
return false;
}
if(slot.hasE() && slot.E.hasTile())
{
adjacent = true;
if (slot.E.tile.borders.W != tile.borders.E)
return false;
}
if(slot.hasW() && slot.W.hasTile())
{
adjacent = true;
if(slot.W.tile.borders.E != tile.borders.W)
return false;
}
// if no adjacent tiles were found, then the slot is not valid
if(!adjacent)
return false;
return true;
}
private void HighlightTileSlot(TileSlot slot)
{
ClearTileSlotHighlights();
slot.rect.Fill = new SolidColorBrush(Color.FromArgb(255, 154, 205, 50));
}
private void InsertTileInSlot(TileSlot slot, Tile tile)
{
// position the tile on the slot
// and tell the tile which slot its in
Canvas.SetLeft(tile.rect, Canvas.GetLeft(slot) - 1);
Canvas.SetTop(tile.rect, Canvas.GetTop(slot) - 1);
tile.slot = slot;
}
void CreateTileSlots()
{
int k = 1;
for (int i = 0; i < 7; i++)
{
for (int j = 0; j < 11; j++)
{
TileSlot t = new TileSlot();
t.number = k++;
_slots.Add(t);
gameSurface.Children.Add(t);
Canvas.SetLeft(t, 80 + j * 79);
Canvas.SetTop(t, 100 + i * 79);
t.N = (i == 0) ? null : FindSlotByNumber(t.number - TILES_IN_A_ROW);
if (t.N != null)
t.N.S = t;
t.S = null;
t.W = (j == 0) ? null : FindSlotByNumber(t.number - 1);
if (t.W != null)
t.W.E = t;
t.E = null;
}
}
}