private void сбросToolStripMenuItem_Click(object sender, EventArgs e)
 {
     direction   = Direction_enum.Unknown_direction;
     abstraction = Abstraction_enum.Unknown_abstraction;
     group       = Group_enum.Unknown_group;
     period      = Period_enum.Unknown_period;
     decision    = Decision_enum.Unknown_decision;
     Update_checking();
 }
 private void конкретноеToolStripMenuItem_Click(object sender, EventArgs e)
 {
     abstraction = Abstraction_enum.Nature_abstraction;
     Update_checking();
 }
 private void абстрактноеToolStripMenuItem_Click(object sender, EventArgs e)
 {
     abstraction = Abstraction_enum.Abstract_abstraction;
     Update_checking();
 }