adding widget and shapes scripts

Author: mdodsworth

shapes-case.scala

@@ -0,0 +1,20 @@
+package shapes.cases
+
+case class Point(x:Int, y:Int)
+
+abstract class Shape {
+    def draw()
+}
+
+case class Triangle(p1:Point, p2:Point, p3:Point) {
+    def draw() = println("triangle")
+}
+
+case class Square(length:Int, width:Int) {
+    def draw = println("Square")
+}
+
+case class Circle(radius:Int, center:Int) {
+    def draw = println("Circle")
+}
+

widget3.scala

@@ -0,0 +1,17 @@
+package ui3
+
+abstract class Widget {
+    def draw():Unit
+    override def toString() = "(Widget)"
+}
+
+class Button(val name :String) extends Widget with Clickable {
+    def click() = println("click!")
+    def draw() = println("draw!")
+    override def toString() = "(Button: " + name + ")"
+}
+
+trait Clickable {
+    def click():Unit
+}
+