/// <summary>
/// KnockDownWall receives the row, column and direction information and
/// calculates the coordinates before sending off the SquareWallRemoved
/// event with LineDrawnEventArgs.
/// </summary>
/// <param name="row">the row of the square</param>
/// <param name="col">the column of the square</param>
/// <param name="dir">the direction of the wall to knock down</param>
private void KnockDownWall(int row, int col, GridPoint.Direction dir)
{
// Compute coordinates of line segment to remove
int c1 = 0, r1 = 0, c2 = 0, r2 = 0;
if (dir == GridPoint.Direction.UP)
{
c1 = col * adjustedSquareSize + 1;
c2 = (col + 1) * adjustedSquareSize - 1;
r1 = r2 = row * adjustedSquareSize;
}
else if (dir == GridPoint.Direction.RIGHT)
{
r1 = row * adjustedSquareSize + 1;
r2 = (row + 1) * adjustedSquareSize - 1;
c1 = c2 = (col + 1) * adjustedSquareSize;
}
else if (dir == GridPoint.Direction.DOWN)
{
c1 = col * adjustedSquareSize + 1;
c2 = (col + 1) * adjustedSquareSize - 1;
r1 = r2 = (row + 1) * adjustedSquareSize;
}
else if (dir == GridPoint.Direction.LEFT)
{
r1 = row * adjustedSquareSize + 1;
r2 = (row + 1) * adjustedSquareSize - 1;
c1 = c2 = col * adjustedSquareSize;
}
//Notify the observer to erase the line
LineDrawnEventArgs lineArgs = new LineDrawnEventArgs();
lineArgs.C1 = c1;
lineArgs.C2 = c2;
lineArgs.R1 = r1;
lineArgs.R2 = r2;
lineArgs.color = backgroundColor;
SquareWallRemoved(this, lineArgs);
}
/// <summary>
/// KnockDownWall receives the square Id and direction information and
/// calls a different version KnockDownWall with row and column information.
/// </summary>
/// <param name="squareId">the id of the the square</param>
/// <param name="dir">the direction of the wall to knock down</param>
private void KnockDownWall(int squareId, GridPoint.Direction dir)
{
KnockDownWall(GetRow(squareId), GetColumn(squareId), dir);
}
