this.Controls.Add(this.upButton1);
			this.Controls.Add(this.floor1);
			this.Controls.Add(this.elevator2);
			this.Controls.Add(this.elevator1);
			this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.Fixed3D;
			this.MaximizeBox = false;
			this.Name = "Elevator";
			this.Text = "Elevator";
			this.elevator1.ResumeLayout(false);
			this.elevator2.ResumeLayout(false);
			this.ResumeLayout(false);

		}
		#endregion

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Elevator());
		}
		//Click of buttons in elevators
		private void elevatorButton_Click(object sender, System.EventArgs e)
		{
			System.Windows.Forms.Button tmp = (System.Windows.Forms.Button)sender;						
			if(passengerE1 > 0)
			{
				if(sender == elevatorButton11 && elevator1.Top != floor1.Top)
					destination1[1]++;
				if(sender == elevatorButton12 && elevator1.Top != floor2.Top)
					destination1[2]++;
				if(sender == elevatorButton13 && elevator1.Top != floor3.Top)
					destination1[3]++;
				if(sender == elevatorButton14 && elevator1.Top != floor4.Top)
					destination1[4]++;
			}
			else if(passengerE2 > 0)
			{
				if(sender == elevatorButton21 && elevator2.Top != floor1.Top)
					destination2[1]++;
				if(sender == elevatorButton22 && elevator2.Top != floor2.Top)
					destination2[2]++;
				if(sender == elevatorButton23 && elevator2.Top != floor3.Top)
					destination2[3]++;
				if(sender == elevatorButton24 && elevator2.Top != floor4.Top)
					destination2[4]++;
			}
			tmp.Enabled = false;
			tmp.BackColor = System.Drawing.Color.Yellow;
		}
		//Click of inbuttons and outbuttons of elevator1
		private void pressButton1_Click(object sender, System.EventArgs e)
		{
			System.Windows.Forms.Button tmp = (System.Windows.Forms.Button)sender;
			if (sender == inButton21 || sender == inButton11 || sender == inButton31 || sender == inButton41)
				if(passengerE1 < 10)
					++passengerE1;
			if (sender == outButton22 || sender == outButton12 || sender == outButton32 || sender == outButton42)
				if(passengerE1 > 0)
					--passengerE1;
			tmp.BackColor = System.Drawing.Color.Yellow;
			elevatorTextBox1.Text = passengerE1.ToString ();
		}
		//Click of inbuttons and outbuttons of elevator2
		private void pressButton2_Click(object sender, System.EventArgs e)
		{
			System.Windows.Forms.Button tmp = (System.Windows.Forms.Button)sender;
			if (sender == inButton23 || sender == inButton13 || sender == inButton33 || sender == inButton43)
				if(passengerE2 < 10)
					++passengerE2;
			if (sender == outButton24 || sender == outButton14 || sender == outButton34 || sender == outButton44)
				if(passengerE2 > 0)
					--passengerE2;
			tmp.BackColor = System.Drawing.Color.Yellow;
			elevatorTextBox2.Text = passengerE2.ToString();
		}

		//Click of upbuttons and downbuttons
		private void pressButton3_Click(object sender, System.EventArgs e)
		{
			System.Windows.Forms.Button tmp = (System.Windows.Forms.Button)sender;
			tmp.BackColor = System.Drawing.Color.Yellow;
			if(sender == upButton1 && elevator1.Top != floor1.Top && elevator2.Top != floor1.Top)
				unhandled[0,1] = true;
			if(sender == upButton2 && elevator1.Top != floor2.Top && elevator2.Top != floor2.Top)
				unhandled[0,2] = true;
			if(sender == upButton3 && elevator1.Top != floor3.Top && elevator2.Top != floor3.Top)
				unhandled[0,3] = true;
			if(sender == downButton2 && elevator1.Top != floor2.Top && elevator2.Top != floor2.Top)
				unhandled[1,2] = true;
			if(sender == downButton3 && elevator1.Top != floor3.Top && elevator2.Top != floor3.Top)
				unhandled[1,3] = true;
			if(sender == downButton4 && elevator1.Top != floor4.Top && elevator2.Top != floor4.Top)
				unhandled[1,4] = true;
		}

		private void timerControl_Tick(object sender, System.EventArgs e)
		{
			//Assign the current missions to one of the elevators
			assignMission();
			//Elevators approach one of its destinations
			touchDownE1();
			touchDownE2();
			//Set the direction and adjust their properties
			setDirection();
			adjustProperty();
			//Suspend when reaching any floor
			suspendE1();
			suspendE2();

			moveUpDown();
		}
		private void assignMission ()
		{
			if (unhandled[1,4])					//DownButton4
			{
				if ((floor4.Top > elevator1.Top && directE1 == (int)Direct.UP) || (floor4.Top > elevator2.Top && directE2 == (int)Direct.UP))
				{
					if (directE1 == (int)Direct.HALT)
						destination2[4] = 1;
					else if (directE2 == (int)Direct.HALT)
						destination1[4] = 1;
					else if (floor3.Top-elevator1.Top < floor3.Top-elevator2.Top)
						destination1[4] = 1;
					else 
						destination2[4] = 1;
					unhandled[1,4] = false;
				}
				else if (directE1 == (int)Direct.HALT || directE2 == (int)Direct.HALT)
				{
					if (directE1 != (int)Direct.HALT)
						destination2[4] = 1;
					else if (directE2 != (int)Direct.HALT)
						destination1[4] = 1;
					else if (Math.Abs(floor4.Top-elevator1.Top) < Math.Abs(floor4.Top-elevator2.Top))
						destination1[4] = 1;
					else
						destination2[4] = 1;
					unhandled[1,4] = false;
				}
			}
			if (unhandled[0,3])					//UpButton3
			{
				if ((floor3.Top > elevator1.Top && directE1 == (int)Direct.UP) || (floor3.Top > elevator2.Top && directE2 == (int)Direct.UP))
				{
					if (directE2 == (int)Direct.HALT)
						destination2[3] = 1;
					else if (directE2 == (int)Direct.HALT)
						destination1[3] = 1;
					else if (floor3.Top-elevator1.Top < floor3.Top-elevator2.Top)
						destination1[3] = 1;
					else 
						destination2[3] = 1;
					unhandled[0,3] = false;
				}
				else if (directE1 == (int)Direct.HALT || directE2 == (int)Direct.HALT)
				{
					if (directE1 != (int)Direct.HALT)
						destination2[3] = 1;
					else if (directE2 != (int)Direct.HALT)
						destination1[3] = 1;
					else if (Math.Abs(floor3.Top-elevator1.Top) < Math.Abs(floor3.Top-elevator2.Top))
						destination1[3] = 1;
					else
						destination2[3] = 1;
					unhandled[0,3] = false;
				}
			}
			if (unhandled[1,3])					//DownButton3
			{
				if ((floor3.Top < elevator1.Top && directE1 == (int)Direct.DOWN) || (floor3.Top < elevator2.Top && directE2 == (int)Direct.DOWN))
				{ 
					if (directE2 == (int)Direct.HALT)
						destination2[3] = 1;
					else if (directE2 == (int)Direct.HALT)
						destination1[3] = 1;
					else if (floor3.Top-elevator1.Top < floor3.Top-elevator2.Top)
						destination2[3] = 1;
					else 
						destination1[3] = 1;
					unhandled[1,3] = false;
				}
				else if (directE1 == (int)Direct.HALT || directE2 == (int)Direct.HALT)
				{
					if (directE1 != (int)Direct.HALT)
						destination2[3] = 1;
					else if (directE2 != (int)Direct.HALT)
						destination1[3] = 1;
					else if (Math.Abs(floor3.Top-elevator1.Top) < Math.Abs(floor3.Top-elevator2.Top))
						destination1[3] = 1;
					else
						destination2[3] = 1;
					unhandled[1,3] = false;
				}
			}
			if (unhandled[0,2])					//UpButton2
			{
				if ((floor2.Top > elevator1.Top && directE1 == (int)Direct.UP) || (floor2.Top > elevator2.Top && directE2 == (int)Direct.UP))
				{
					if (directE2 == (int)Direct.HALT)
						destination2[2] = 1;
					else if (directE2 == (int)Direct.HALT)
						destination1[2] = 1;
					else if (floor2.Top-elevator1.Top < floor2.Top-elevator2.Top)
						destination1[2] = 1;
					else 
						destination2[2] = 1;
					unhandled[0,2] = false;
				}
				else if (directE1 == (int)Direct.HALT || directE2 == (int)Direct.HALT)
				{
					if (directE1 != (int)Direct.HALT)
						destination2[2] = 1;
					else if (directE2 != (int)Direct.HALT)
						destination1[2] = 1;
					else if (Math.Abs(floor2.Top-elevator1.Top) < Math.Abs(floor2.Top-elevator2.Top))
						destination1[2] = 1;
					else
						destination2[2] = 1;
					unhandled[0,2] = false;
				}
			}
			if (unhandled[1,2])					//DownButton2
			{
				if ((floor2.Top < elevator1.Top && directE1 == (int)Direct.DOWN) || (floor2.Top < elevator2.Top && directE2 == (int)Direct.DOWN))
				{
					if (directE2 == (int)Direct.HALT)
						destination2[2] = 1;
					else if (directE2 == (int)Direct.HALT)
						destination1[2] = 1;
					else if (floor2.Top-elevator1.Top < floor2.Top-elevator2.Top)
						destination2[2] = 1;
					else 
						destination1[2] = 1;
					unhandled[1,2] = false;
				}
				else if (directE1 == (int)Direct.HALT || directE2 == (int)Direct.HALT)
				{
					if (directE1 != (int)Direct.HALT)
						destination2[2] = 1;
					else if (directE2 != (int)Direct.HALT)
						destination1[2] = 1;
					else if (Math.Abs(floor2.Top-elevator1.Top) < Math.Abs(floor2.Top-elevator2.Top))
						destination1[2] = 1;
					else
						destination2[2] = 1;
					unhandled[1,2] = false;
				}
			}
			if (unhandled[0,1])					//UpButton1
			{
				if ((floor1.Top < elevator1.Top && directE1 == (int)Direct.DOWN) || (floor1.Top < elevator2.Top && directE2 == (int)Direct.DOWN))
				{
					if (directE2 == (int)Direct.HALT)
						destination2[1] = 1;
					else if (directE2 == (int)Direct.HALT)
						destination1[1] = 1;
					else if (floor1.Top-elevator1.Top < floor1.Top-elevator2.Top)
						destination2[1] = 1;
					else 
						destination1[1] = 1;
					unhandled[0,1] = false;
				}
				else if (directE1 == (int)Direct.HALT || directE2 == (int)Direct.HALT)
				{
					if (directE1 != (int)Direct.HALT)
						destination2[1] = 1;
					else if (directE2 != (int)Direct.HALT)
						destination1[1] = 1;
					else if (Math.Abs(floor2.Top-elevator1.Top) < Math.Abs(floor2.Top-elevator2.Top))
						destination1[1] = 1;
					else
						destination2[1] = 1;
					unhandled[0,1] = false;
				}
			}
		}
		private void touchDownE1 ()
		{
			//Elevator1 approaches one of the floors
			if (directE1 != (int)Direct.HALT && suspendTime1 == 0)	
			{
				if (elevator1.Top == floor1.Top && destination1[1] > 0)
				{
					inButton11.Enabled = true;
					outButton12.Enabled = true;
					elevatorButton12.Enabled = true;
					elevatorButton13.Enabled = true;
					elevatorButton14.Enabled = true;
					upButton1.BackColor = System.Drawing.SystemColors.Control;
					elevatorButton11.Enabled = false;
					elevatorButton11.BackColor = System.Drawing.SystemColors.Control;
					destination1[1]--;
					suspendTime1 = 300;
					directE1 = (int)Direct.HALT;
				}
				else if (elevator1.Top == floor2.Top && destination1[2] > 0)
				{
					if (downButton2.BackColor == System.Drawing.Color.Yellow || upButton2.BackColor==System.Drawing.Color.Yellow)
					{
						downButton2.BackColor = System.Drawing.SystemColors.Control;
						upButton2.BackColor = System.Drawing.SystemColors.Control;
					}
					else
					{
						if (directE1 == (int)Direct.DOWN)
							downButton2.BackColor = System.Drawing.SystemColors.Control;
						else
							upButton2.BackColor = System.Drawing.SystemColors.Control;
					}
					inButton21.Enabled = true;
					outButton22.Enabled = true;
					elevatorButton11.Enabled = true;
					elevatorButton13.Enabled = true;
					elevatorButton14.Enabled = true;
					elevatorButton12.Enabled = false;
					elevatorButton12.BackColor = System.Drawing.SystemColors.Control;
					destination1[2]--;
					suspendTime1 = 300;