//verifies if there exists a viable jump move for the pawn
public int jump()
{
if (x + 2 < 8 && y + 2 < 8)
{
if (board.get_square(x + 2, y + 2) == 0 && board.get_square(x + 1, y + 1) == 3 - side)
{
return(1);
}
}
if (x - 2 > -1 && y + 2 < 8)
{
if (board.get_square(x - 2, y + 2) == 0 && board.get_square(x - 1, y + 1) == 3 - side)
{
return(1);
}
}
if (x + 2 < 8 && y - 2 > -1)
{
if (board.get_square(x + 2, y - 2) == 0 && board.get_square(x + 1, y - 1) == 3 - side)
{
return(1);
}
}
if (x - 2 > -1 && y - 2 > -1)
{
if (board.get_square(x - 2, y - 2) == 0 && board.get_square(x - 1, y - 1) == 3 - side)
{
return(1);
}
}
return(0);
}
//handle first pawn selection, then move from mouseclicks
void MoveHandler(object sender, EventArgs e)
{
int result = 0;
DraughtsButton field = (DraughtsButton)sender;
switch (phase)
{
case 0: //choose the pawn
if (state.get_square(field.x, field.y) == state.active_side)
{
field.FlatStyle = FlatStyle.Flat;
field.FlatAppearance.BorderColor = Color.DarkGreen;
field.FlatAppearance.BorderSize = 2;
highlighted = field;
phase = 1;
move_list.Enqueue(field.x);
move_list.Enqueue(field.y);
}
break;
case 1: //make the move or change the pawn
if (state.get_square(field.x, field.y) == state.active_side) //change the pawn
{
highlighted.FlatAppearance.BorderSize = 0;
highlighted.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
field.FlatStyle = FlatStyle.Flat;
field.FlatAppearance.BorderColor = Color.DarkGreen;
field.FlatAppearance.BorderSize = 2;
highlighted = field;
move_list.Dequeue();
move_list.Dequeue();
move_list.Enqueue(field.x);
move_list.Enqueue(field.y);
}
else
{
if (state.get_square(field.x, field.y) == 0)
{
result = state.move(highlighted.x, highlighted.y, field.x, field.y);
switch (result)
{
//0 - incorrect move, no action neccessary, so no case
case 1: //end turn;
move_list.Enqueue(field.x);
move_list.Enqueue(field.y);
if (state.check_promotion(field.x, field.y))
{
if (state.active_side == 1)
{
field.Image = Properties.Resources.white_king;
}
else
{
field.Image = Properties.Resources.black_king;
}
}
else
{
field.Image = highlighted.Image;
}
field.id = highlighted.id;
highlighted.Image = Properties.Resources.field;
highlighted.id = 0;
highlighted.FlatAppearance.BorderSize = 0;
highlighted.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
phase = 0;
change_active();
break;
case 2: //remove captured pawn and end turn
jump = true;
move_list.Enqueue(field.x);
move_list.Enqueue(field.y);
winCheck();
if (state.check_promotion(field.x, field.y))
{
if (state.active_side == 1)
{
field.Image = Properties.Resources.white_king;
}
else
{
field.Image = Properties.Resources.black_king;
}
}
else
{
field.Image = highlighted.Image;
}
field.id = highlighted.id;
highlighted.Image = Properties.Resources.field;
highlighted.id = 0;
highlighted.FlatAppearance.BorderSize = 0;
((DraughtsButton)this.Controls.Find(state.to_kill, false)[0]).Image = Properties.Resources.field;
highlighted.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
phase = 0;
change_active();
break;
case 3: //further captures possible
jump = true;
winCheck();
move_list.Enqueue(field.x);
move_list.Enqueue(field.y);
if (state.check_promotion(field.x, field.y))
{
if (state.active_side == 1)
{
field.Image = Properties.Resources.white_king;
}
else
{
field.Image = Properties.Resources.black_king;
}
}
else
{
field.Image = highlighted.Image;
}
field.id = highlighted.id;
field.FlatAppearance.BorderColor = Color.DarkGreen;
field.FlatAppearance.BorderSize = 2;
highlighted.Image = Properties.Resources.field;
((DraughtsButton)this.Controls.Find(state.to_kill, false)[0]).Image = Properties.Resources.field;
highlighted.id = 0;
highlighted.FlatAppearance.BorderSize = 0;
highlighted.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
highlighted = field;
phase = 2;
break;
}
}
}
break;
case 2: //move continuation after a jump
result = state.move(highlighted.x, highlighted.y, field.x, field.y);
switch (result)
{
//0,1 - incorrect move, no action neccessary, so no case
case 2: //remove captured pawn and end turn
move_list.Enqueue(field.x);
move_list.Enqueue(field.y);
winCheck();
if (state.check_promotion(field.x, field.y))
{
if (state.active_side == 1)
{
field.Image = Properties.Resources.white_king;
}
else
{
field.Image = Properties.Resources.black_king;
}
}
else
{
field.Image = highlighted.Image;
}
field.id = highlighted.id;
highlighted.Image = Properties.Resources.field;
highlighted.id = 0;
highlighted.FlatAppearance.BorderSize = 0;
highlighted.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
phase = 0;
((DraughtsButton)this.Controls.Find(state.to_kill, false)[0]).Image = Properties.Resources.field;
change_active();
break;
case 3: //further captures possible
move_list.Enqueue(field.x);
move_list.Enqueue(field.y);
winCheck();
if (state.check_promotion(field.x, field.y))
{
if (state.active_side == 1)
{
field.Image = Properties.Resources.white_king;
}
else
{
field.Image = Properties.Resources.black_king;
}
}
else
{
field.Image = highlighted.Image;
}
field.id = highlighted.id;
field.FlatAppearance.BorderColor = Color.DarkGreen;
field.FlatAppearance.BorderSize = 2;
highlighted.Image = Properties.Resources.field;
((DraughtsButton)this.Controls.Find(state.to_kill, false)[0]).Image = Properties.Resources.field;
highlighted.id = 0;
highlighted.FlatAppearance.BorderSize = 0;
highlighted.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
highlighted = field;
phase = 2;
break;
}
break;
}
}