public bool Undo()
{
if (PlaytimeLine.Count <= 0)
{
return(false);
}
playInfo oldPoint = PlaytimeLine.Pop();
Button btn = Matrix[oldPoint.Point.Y][oldPoint.Point.X];
btn.BackgroundImage = null;
btn.Enabled = true;
xoaSinhNuocDi();
if (!(PlaytimeLine.Count <= 0))
{
oldPoint = PlaytimeLine.Peek();
}
timViTri();
return(true);
}
public void timViTri() //tim vi tri quan ma, sau khi undo
{
playInfo oldPoint = PlaytimeLine.Peek();
int i = 0;
while (i < 8)
{
int ty = oldPoint.Point.X + dy[i];
int tx = oldPoint.Point.Y + dx[i];
if ((ty >= 0 && ty < N && tx >= 0 && tx < N && banCo[ty, tx] == 0) && (Matrix[tx][ty].BackgroundImage != quanMa))
{
if (!(Matrix[tx][ty].BackgroundImage == quanMa_dadi))
{
Matrix[tx][ty].BackgroundImage = quanMa;
Matrix[tx][ty].Enabled = true;
}
}
i++;
}
}