fix NullPointerException when calling votersBallot.toString and add showBallot (new window)

voting-booth-gui/src/main/java/meerkat/voting/gui/panels/straight_channel_section/StraightChannelSectionController.java

@@ -50,6 +50,7 @@ public class StraightChannelSectionController extends TwoWayNode {
         this.logger.debug("Created and filled with zeros the channel value.");
 
         this.updateVisualChanel();
+        this.UpdateVotersChoise();
     }
 
     /**

voting-booth-gui/src/main/java/meerkat/voting/gui/panels/vote_have_been_cast/VoteHaveBeenCastController.java

@@ -15,6 +15,10 @@ import javax.imageio.ImageIO;
 import java.awt.image.BufferedImage;
 import java.io.File;
 import java.io.IOException;
+import javax.swing.JFrame;
+import javax.swing.JLabel;
+import javax.swing.ImageIcon;
+import java.awt.image.BufferedImage;
 
 /**
  * Created by Vladimir Eliezer Tokarev on 8/27/2016.
@@ -33,6 +37,7 @@ public class VoteHaveBeenCastController extends TwoWayNode {
         BufferedImage image = BarcodeImageHandler.getImage(barcode);
         File outputfile = new File("VotersBallot.png");
         ImageIO.write(image, "png", outputfile);
+        showBallot("VotersBallot.png");
         this.logger.debug("Created the bar code with voters choises at VotersBallot.png.");
     }
 
@@ -50,4 +55,15 @@ public class VoteHaveBeenCastController extends TwoWayNode {
     public void UpdateNode() {
         // This panel doesn't have any questions representations that why there is nothing ti show here
     }
+
+    private void showBallot(String filename) throws IOException {
+        final JFrame frame = new JFrame();
+        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+//        bi = ImageIO.read(ImageResourceDemo.class.getResource("../resource/avatar6.jpeg"));
+        BufferedImage bi = ImageIO.read(new File(filename));
+        frame.add(new JLabel(new ImageIcon(bi)));
+        frame.pack();
+        frame.setLocationRelativeTo(null);
+        frame.setVisible(true);
+    }
 }