private void DoNextCommand(MouseEventArgs e, bool move)
{
switch (nextAction.ToString())
{
case "DRAW":
DrawLine(e);
break;
case "ERASE":
if (e.LeftButton == MouseButtonState.Pressed)
{
EraseLine();
}
break;
case "FILL":
if (!move)
{
FillCanvas();
}
break;
default:
break;
}
}