SoftwareEngineering2018/src/edu/nd/sarec/railwaycrossing/model/infrastructure/gate/CrossingGate.java at 66617ff8b81ea83192423816d26098255b7d140e · SAREC-Lab/SoftwareEngineering2018 · GitHub

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package edu.nd.sarec.railwaycrossing.model.infrastructure.gate;

import java.util.Observable;
import java.util.Observer;

import edu.nd.sarec.railwaycrossing.model.vehicles.Train;
import edu.nd.sarec.railwaycrossing.model.vehicles.Train2;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Line;

/**
 * Context class for Crossing Gate
 * @author jane
 *
 */
public class CrossingGate extends Observable implements Observer{

	// Crossing Gate location and its trigger & exit points
	private int anchorX;
	private int anchorY;
	private int movingX;
	private int movingY;
	private int triggerPoint;
	private int triggerPoint2;
	private int exitPoint;
	private int exitPoint2;

	private IGateState gateClosed;
	private IGateState gateOpen;
	private IGateState gateClosing;
	private IGateState gateOpening;
	private IGateState currentGateState;
	private Line line;
	private Pane root;

	String gateName;

	public CrossingGate(){}

	public CrossingGate(int xPosition, int yPosition, String crossingGate){
		anchorX = xPosition;
		anchorY = yPosition;
		movingX = anchorX;
		movingY = anchorY-60;
		triggerPoint = anchorX+250;
		triggerPoint2 = anchorX-250;
		exitPoint = anchorX-250;
		exitPoint2 = anchorX+250;

		// Gate elements
		line = new Line(anchorX, anchorY,movingX,movingY);
		line.setStroke(Color.RED);
	    line.setStrokeWidth(10);

		// Gate States
		gateClosed = new GateClosed(this);
		gateOpen = new GateOpen(this);
		gateOpening = new GateOpening(this);
		gateClosing = new GateClosing(this);
		currentGateState = gateOpen;
		gateName = crossingGate;
	}

	public Line getGateLine(){
		return line;
	}

	public void operateGate(){
		currentGateState.operate();
	}

	public void close(){
		if (movingY<anchorY){
		    movingX+=1;
		    movingY+=1;
			line.setStartX(anchorX);
			line.setStartY(anchorY);
			line.setEndX(movingX);
			line.setEndY(movingY);
		} else {
			currentGateState.gateFinishedOpening();
		}
	}

	public void open(){
		if (movingX>anchorX){
			movingX-=1;
			movingY-=1;
			line.setStartX(anchorX);
			line.setStartY(anchorY);
			line.setEndX(movingX);
			line.setEndY(movingY);
		}  else {
			currentGateState.gateFinishedOpening();
		}
	}

	// State getters and setters
	public IGateState getGateClosedState(){
		return gateClosed;
	}
	public IGateState getGateOpenState(){
		return gateOpen;
	}
	public IGateState getGateClosingState(){
		return gateClosing;
	}
	public IGateState getGateOpeningState(){
		return gateOpening;
	}

	public void setGateState(IGateState newState){
		currentGateState = newState;
		setChanged();
		notifyObservers();
	}

	public int getAnchorY() {
		return anchorY;
	}

	public String getTrafficCommand(){
		return currentGateState.getTrafficAction();
	}

	@Override
	public void update(Observable o, Object arg) {
		if (o instanceof Train){
			Train train = (Train)o;
			if (train.getVehicleX() < exitPoint)
				currentGateState.leaveStation();
			else if(train.getVehicleX() < triggerPoint){
				currentGateState.approachStation();
			}
		}
		if (o instanceof Train2){
			Train2 train2 = (Train2)o;
			if (train2.getVehicleX() > exitPoint2)
				currentGateState.leaveStation();
			else if(train2.getVehicleX() > triggerPoint2){
				currentGateState.approachStation();
			}
		}
	}
}