added a pin direction

src/main/java/de/neemann/digital/gui/draw/parts/Pin.java

@@ -6,15 +6,28 @@ import de.neemann.digital.gui.draw.graphics.Vector;
  * @author hneemann
  */
 public class Pin {
-    private Vector pos;
-    private String name;
 
-    public Pin(Vector pos, String name) {
+    private final Vector pos;
+    private final String name;
+    private final Direction direction;
+
+    public Pin(Vector pos, String name, Direction direction) {
         this.pos = pos;
         this.name = name;
+        this.direction = direction;
     }
 
     public Vector getPos() {
         return pos;
     }
+
+    public String getName() {
+        return name;
+    }
+
+    public Direction getDirection() {
+        return direction;
+    }
+
+    public enum Direction {input, output, both}
 }