Cleaned out the printstacktraces from the client and GUI classes.

src/GUI/DrawingArea.java

@@ -126,7 +126,8 @@ public class DrawingArea extends JPanel implements MouseMotionListener, MouseLis
         try {
             ImageIO.write(image, "PNG", file);
         } catch (IOException e) {
-            e.printStackTrace();
+            StartScreen.showErrorMessage("Error in saving PNG");
+            //e.printStackTrace();
         }
     }
 
@@ -137,7 +138,8 @@ public class DrawingArea extends JPanel implements MouseMotionListener, MouseLis
         try {
             ImageIO.write(imageJPG, "JPG", file);
         } catch (IOException e) {
-            e.printStackTrace();
+            StartScreen.showErrorMessage("Error in saving JPG");
+            //e.printStackTrace();
         }
     }
 
@@ -145,7 +147,8 @@ public class DrawingArea extends JPanel implements MouseMotionListener, MouseLis
         try {
             image = ImageIO.read(file);
         } catch (IOException e) {
-            e.printStackTrace();
+            StartScreen.showErrorMessage("Error in opening file");
+            //e.printStackTrace();
         }
         repaint();
     }
@@ -212,8 +215,7 @@ public class DrawingArea extends JPanel implements MouseMotionListener, MouseLis
                 g2.drawString(textString, startPoint.x, startPoint.y);
                 try {
                     client.getDrawingController().broadcastText(client.getUserName(), textString, g2.getFont(), shapeColor, startPoint);
-                } catch (RemoteException ex)
-                {
+                } catch (RemoteException ex) {
                     StartScreen.showErrorMessage("Connection with server lost");
                     System.exit(0);
                     //ex.printStackTrace();

src/GUI/PaintGUI.java

@@ -84,7 +84,8 @@ public class PaintGUI extends JPanel {
             textBtn = new JButton(new ImageIcon(textIcon));
             textBtn.addActionListener(actionListener);
         } catch (Exception e) {
-            e.printStackTrace();
+            StartScreen.showErrorMessage("Error setting up canvas buttons");
+            //e.printStackTrace();
         }
 
         strokeOptions = new JComboBox(strokes);
@@ -248,7 +249,8 @@ public class PaintGUI extends JPanel {
                         baos.close();
                     }
                     catch (IOException err) {
-                        err.printStackTrace();
+                        StartScreen.showErrorMessage("Error writing file");
+                        //err.printStackTrace();
                     }
 
                     try {
@@ -419,6 +421,7 @@ public class PaintGUI extends JPanel {
         openBtn.setEnabled(false);
         saveBtn.setEnabled(false);
         saveAsBtn.setEnabled(false);
+        clearBtn.setEnabled(false);
     }
 
     public void enableFileControl() {
@@ -426,6 +429,7 @@ public class PaintGUI extends JPanel {
         openBtn.setEnabled(true);
         saveBtn.setEnabled(true);
         saveAsBtn.setEnabled(true);
+        clearBtn.setEnabled(true);
     }
 
 }
\ No newline at end of file

src/client/DrawingUpdate.java

 package client;
 
+import GUI.StartScreen;
 import remote.IDrawingUpdate;
 
 import javax.swing.*;
@@ -155,8 +156,10 @@ public class DrawingUpdate extends UnicastRemoteObject implements IDrawingUpdate
 
             // do whatever you wish with the image
         }
-        catch (IOException err) {
-            err.printStackTrace();
+        catch (IOException err)
+        {
+            StartScreen.showErrorMessage("Error in receiving image");
+            //err.printStackTrace();
         }
         return true;
     }
@@ -185,8 +188,10 @@ class removeClientTimer extends Thread {
                 elementIndex = temp.indexOf(fromClient);
                 temp.remove(elementIndex);
             }
-        } catch (InterruptedException e) {
-            e.printStackTrace();
+        } catch (InterruptedException e)
+        {
+            StartScreen.showErrorMessage("Interrupted Exception");
+            //e.printStackTrace();
         }
     }
 

src/client/EncryptionUpdate.java

 package client;
 
+import GUI.StartScreen;
 import remote.IDrawingUpdate;
 import remote.IEncryptionUpdate;
 
@@ -35,15 +36,20 @@ public class EncryptionUpdate extends UnicastRemoteObject implements IEncryption
 
 
         } catch (NoSuchAlgorithmException e) {
-            e.printStackTrace();
+            StartScreen.showErrorMessage("Shared key error");
+            //e.printStackTrace();
         } catch (NoSuchProviderException e) {
-            e.printStackTrace();
+            StartScreen.showErrorMessage("Shared key error");
+            //e.printStackTrace();
         } catch (NoSuchPaddingException | InvalidKeyException e) {
-            e.printStackTrace();
+            StartScreen.showErrorMessage("Shared key error");
+            //e.printStackTrace();
         } catch (BadPaddingException e) {
-            e.printStackTrace();
+            StartScreen.showErrorMessage("Shared key error");
+            //e.printStackTrace();
         } catch (IllegalBlockSizeException e) {
-            e.printStackTrace();
+            StartScreen.showErrorMessage("Shared key error");
+            //e.printStackTrace();
         }
 
 
@@ -59,9 +65,8 @@ public class EncryptionUpdate extends UnicastRemoteObject implements IEncryption
 
         }
         catch (Exception e){
-            e.printStackTrace();
+            StartScreen.showErrorMessage("Encryption Update error");
+            //e.printStackTrace();
         }
-
     }
-
 }