Adds ClickOnEdge detection to the VisualInteractor

src/main/java/de/tu_darmstadt/tk/SmartHomeNetworkSim/view/VisualisationInteractor.java

@@ -23,6 +23,7 @@ import de.tu_darmstadt.tk.SmartHomeNetworkSim.core.Port;
 import de.tu_darmstadt.tk.SmartHomeNetworkSim.core.SmartDevice;
 import de.tu_darmstadt.tk.SmartHomeNetworkSim.core.simpleImplementation.SimpleLink;
 import de.tu_darmstadt.tk.SmartHomeNetworkSim.core.simpleImplementation.SimpleProtocol;
+import de.tu_darmstadt.tk.SmartHomeNetworkSim.core.util.Pair;
 
 /**
  * Listener which detects User Interaction with the {@link VisualisationPanel},
@@ -131,6 +132,11 @@ public class VisualisationInteractor implements MouseInputListener,
 	 * SmartDevice that was clicked
 	 */
 	private SmartDevice clicked = null;
+	
+	/**
+	 * Clicked Connections
+	 */
+	public LinkedList<Pair<Connection,Pair<Port,Port>>> clickedConnection = new LinkedList<Pair<Connection,Pair<Port,Port>>>();
 
 	public SmartDevice connectionFrom = null;
 
@@ -200,6 +206,18 @@ public class VisualisationInteractor implements MouseInputListener,
 					mode = NOTHING; 
 				else if(!selectedDevices.isEmpty())
 					mode = SELECTED;
+				
+				//TODO: Click on Edge functionalities
+				LinkedList<Pair<Connection, Pair<Port, Port>>> clickedCons = getConnectionsAtPosition(e.getX(), e.getY());
+				System.out.println("Click on Edge?: "+!clickedCons.isEmpty());
+				if(!(clickedCons.isEmpty()&&clickedConnection.isEmpty())){
+					clickedConnection.clear();
+					clickedConnection = clickedCons;
+					if(!clickedConnection.isEmpty())
+						mode = SELECTED;
+					panel.repaint();
+					
+				}
 			}
 			break;
 		default:
@@ -447,6 +465,67 @@ public class VisualisationInteractor implements MouseInputListener,
 		}
 		return null;
 	}
+	
+	/**
+	 * Returns all Connections, which cross point (x,y)
+	 * @param x xPosition of the point (x,y)
+	 * @param y yPosition of the point (x,y)
+	 * @return List of all possible clicked Connections
+	 */
+	private LinkedList<Pair<Connection, Pair<Port, Port>>> getConnectionsAtPosition(int x, int y) {
+		LinkedList<Pair<Connection,Pair<Port,Port>>> edges = new LinkedList<Pair<Connection,Pair<Port,Port>>>();
+		// Check is device is inside visualization radius
+		for(Connection c: model.getConnections()){
+			if(c.getProtocol()==null)
+				continue;
+			for(Pair<Port, Port> p: c.getProtocol().getTopology()){
+				if(pointOnConnection(x,y,p)){
+					edges.add(new Pair<Connection, Pair<Port,Port>>(c, p));
+					break;//Connection was clicked - check for further connections
+				}
+			}
+		}
+		return edges;
+	}
+
+	/**
+	 * Returns true if the point (x,y) is on the connection part p.
+	 * 
+	 * @param x xPosition of the Point
+	 * @param y yPosition of the Point
+	 * @param p connection part, which connects to Ports with a line
+	 * @return true if point is on connection, else false
+	 */
+	private boolean pointOnConnection(int x, int y, Pair<Port, Port> p) {
+		//No valid connection part
+		if(p.getLeft()==null||p.getRight()==null||p.getLeft().getOwner()==null||p.getRight().getOwner()==null)
+			return false;
+		int lX = p.getLeft().getOwner().getX();
+		int lY = p.getLeft().getOwner().getY();
+		int rX = p.getRight().getOwner().getX();
+		int rY = p.getRight().getOwner().getY();
+		//Point out of bounds
+		if(x < Math.min(lX, rX) || x > Math.max(lX, rX) || y < Math.min(lY, rY) || y > Math.max(lY, rY))
+			return false;
+		double dLP = distance(lX,lY,x,y);
+		double dPR = distance(x,y,rX,rY);
+		double dLR = distance(lX,lY,rX,rY);
+		double diff = Math.abs(dLP+dPR-dLR);
+		return diff < 0.5;
+	}
+
+	/**
+	 * Calculates distance between (x1,y1) and (x2,y2)
+	 * 
+	 * @param x1 x Position of Point 1
+	 * @param y1 y Position of Point 1
+	 * @param x2 x Position of Point 1 
+	 * @param y2 y Position of Point 1
+	 * @return distance
+	 */
+	private double distance(int x1, int y1, int x2, int y2) {
+		return Math.sqrt(Math.pow(x1-x2, 2)+Math.pow(y1-y2, 2));
+	}
 
 	@Override
 	public void keyTyped(KeyEvent e) {