Add screensaver files

src/MovingLine.java

@@ -0,0 +1,61 @@
+import org.jfree.fx.FXGraphics2D;
+
+import java.awt.*;
+import java.awt.geom.Line2D;
+
+public class MovingLine {
+
+    private MovingPoint beginPoint;
+    private MovingPoint endPoint;
+    private Color color;
+
+    private int counter = 0;
+
+    private int MAX_LINES = 30;
+
+    private Line2D.Double[] trailingLines;
+
+    public MovingLine(MovingPoint beginPoint, MovingPoint endPoint, Color color) {
+        this.beginPoint = beginPoint;
+        this.endPoint = endPoint;
+        this.color = color;
+
+        trailingLines = new Line2D.Double[MAX_LINES];
+    }
+
+    public void draw(FXGraphics2D graphics) {
+        graphics.setColor(color);
+        graphics.draw(getAsLine());
+
+        for (int i = trailingLines.length-1; i >= 0; i--) {
+            if (trailingLines[i] != null)
+                graphics.draw(trailingLines[i]);
+        }
+    }
+
+    public void update() {
+        this.beginPoint.update();
+        this.endPoint.update();
+
+        counter++;
+        if (counter == MAX_LINES) {
+            counter = 0;
+        }
+
+        for (int i = trailingLines.length-1; i > 0; i--) {
+            trailingLines[i] = trailingLines[i-1];
+        }
+
+        trailingLines[0] = getAsLine();
+
+    }
+
+    public void setMovingBounds(double canvasWidth, double canvasHeight) {
+        this.beginPoint.setMovingBounds(canvasWidth, canvasHeight);
+        this.endPoint.setMovingBounds(canvasWidth, canvasHeight);
+    }
+
+    public Line2D.Double getAsLine() {
+        return new Line2D.Double(beginPoint.getxPos(), beginPoint.getyPos(), endPoint.getxPos(), endPoint.getyPos());
+    }
+}