added some comments, forcing aspect ratio now

src/de/itsblue/ConnectFour/ConnectFour.java

@@ -29,15 +29,8 @@ public class ConnectFour extends JFrame {
     /**
      *
      */
-    private static final long serialVersionUID = 1L;
-
-
-    @Override
-    public void setTitle(String name) {
-        super.setTitle(name);
-    }   
+    private static final long serialVersionUID = 1L; 
     
-
     ConnectFour() {
         // Constructor
 
@@ -50,7 +43,7 @@ public class ConnectFour extends JFrame {
         this.getContentPane().setLayout(new GridBagLayout());
 
         GameBoard board = new GameBoard();
-        //board.setPreferredSize(new Dimension(600,600));
+        board.setPreferredSize(new Dimension(200,200));
         this.add(board);
 
         for(int i = 0; i < 7; i++) {

src/de/itsblue/ConnectFour/GameBoard.java

@@ -28,8 +28,6 @@ public class GameBoard extends JPanel {
      */
     private static final long serialVersionUID = 1L;
 
-    private boolean isInited = false;
-
     /**
      * The rows of the board
      */
@@ -49,7 +47,6 @@ public class GameBoard extends JPanel {
      * Constructor
      */
     GameBoard() {
-        this.setPreferredSize(new Dimension(this.BoardColumns * 50, this.BoardRows * 50));
         this.initBoard();
     }
 
@@ -108,35 +105,44 @@ public class GameBoard extends JPanel {
                 this.add(this.BoardContainers[j][i]);
             }
         }
-
-        this.isInited = true;
     }
-    
+
+    public int getSuggestedContainerSize(Dimension parentSize) {
+        int containerSize;
+
+        if (parentSize.getWidth() / this.BoardColumns > parentSize.getHeight() / this.BoardRows)
+            containerSize = (int) parentSize.getHeight() / this.BoardRows;
+        else
+            containerSize = (int) parentSize.getWidth() / this.BoardColumns;
+
+        return containerSize;
+    }
+
+    /**
+     * Override paint function to rescale all caontainers on every repaint
+     */
     @Override
     public void paint(Graphics g) {
 
         System.out.println("updating sizes");
-        int containerSize;
-
-        if (this.getSize().getWidth() / this.BoardColumns > this.getSize().getHeight() / this.BoardRows)
-            containerSize = (int) this.getSize().getHeight() / this.BoardRows;
-        else
-            containerSize = (int) this.getSize().getWidth() / this.BoardColumns;
-
-        containerSize = 30;
-
-        System.out.println(containerSize);
-        System.out.println(this.getSize());
 
         for (PlateContainer[] plateContainers : BoardContainers) {
             for (PlateContainer plateContainer : plateContainers) {
-                //plateContainer.setPreferredSize(new Dimension(containerSize, containerSize));
+                plateContainer.setPreferredSize(new Dimension(this.getSuggestedContainerSize(this.getSize()),
+                        this.getSuggestedContainerSize(this.getSize())));
             }
         }
 
         super.paint(g);
     }
 
+    @Override
+    public void setPreferredSize(Dimension preferredSize) {
+        Dimension newSize = new Dimension(this.getSuggestedContainerSize(preferredSize) * this.BoardColumns,
+                this.getSuggestedContainerSize(preferredSize) * this.BoardRows);
+        super.setPreferredSize(newSize);
+    }
+
     /*
      * void winningCondition() { for (int i = 0; i <= 2; i++) for (int j = 0; j <=
      * 6; j++) { if (GameBoard[i][j] == p && GameBoard[i + 1][j] == p && GameBoard[i

src/de/itsblue/ConnectFour/Plate.java

@@ -17,18 +17,21 @@
 */
 
 package de.itsblue.ConnectFour;
-
-import javax.swing.*;
-
 import java.awt.*;
 
+/**
+ * Plate models to plate or 'coin' to be inserted into
+ * game grid. It therefore has a type (X or O) which
+ * comes with a color (X = RED; O = BLACK) and a value
+ * (X = -1; O = 1) for further processing. this is a
+ * helper class and does not come with any standalone
+ * usage.
+ * 
+ * @author Oliver Schappacher
+ * @author Dorian Zedler
+ */
 public class Plate {
 
-    /**
-     *
-     */
-    private static final long serialVersionUID = 1L;
-
     /**
      * Enum containing all plate types
      */
@@ -43,27 +46,52 @@ public class Plate {
 
     /**
      * Constructor
+     * 
      * @param type type of the plate
      */
     Plate(PlateType type) {
-        this.setType(type);
+        this.type = type;
     }
 
     /**
      * Function to get the type of the plate
+     * 
      * @return PlateType
      */
-	public PlateType getType() {
+    public PlateType getType() {
         return this.type;
     }
 
     /**
-     * Function to change the type of the plate
+     * Function to get the type of the plate as int
      * 
-     * @param type the type to set the plate to
+     * @return plate type as int (O=1; X=-1)
      */
-    private void setType(PlateType type) {
-        this.type = type;
+    public int getValue() {
+        switch (this.type) {
+        case O:
+            return 1;
+        case X:
+            return -1;
+        default:
+            return 0;
+        }
+    }
+
+    /**
+     * Function to get the color of the plate
+     * 
+     * @return the color of the plate
+     */
+    public Color getColor() {
+        switch (this.type) {
+        case O:
+            return Color.BLACK;
+        case X:
+            return Color.RED;
+        default:
+            return Color.WHITE;
+        }
     }
 
 }

src/de/itsblue/ConnectFour/PlateContainer.java

@@ -19,10 +19,6 @@
 package de.itsblue.ConnectFour;
 
 import javax.swing.JPanel;
-
-import de.itsblue.ConnectFour.Plate.PlateType;
-
-import javax.swing.*;
 import java.awt.*;
 
 public class PlateContainer extends JPanel {
@@ -72,7 +68,8 @@ public class PlateContainer extends JPanel {
     /**
      * Function to check if the container is occupied
      * 
-     * @return true if occupied, false if not
+     * @return <code>true</code> if occupied
+     *         <code>false</code> if not
      */
     public boolean containsPlate() {
         if (this.containedPlate != null)
@@ -84,7 +81,7 @@ public class PlateContainer extends JPanel {
     /**
      * Function to clear the container
      * 
-     * @return if it was occupied: contained plate, else: null
+     * @return if it was occupied: contained plate, else: <code>null</code>
      */
     public Plate removePlate() {
         if (!this.containsPlate())
@@ -97,16 +94,22 @@ public class PlateContainer extends JPanel {
         return ret;
     }
 
+    /**
+     * Override the paint function to draw the shape of the plate
+     */
     @Override
     public void paint(Graphics g) {
+        // draw background
         g.setColor(Color.lightGray);
         g.fillRect(0, 0, this.getWidth(), this.getHeight());
 
-        if (this.containsPlate()) {
-            g.setColor(this.containedPlate.getType() == PlateType.X ? Color.RED : Color.BLACK);
-        } else
+        // set color according to contained plate
+        if (this.containsPlate())
+            g.setColor(this.containedPlate.getColor());
+        else
             g.setColor(Color.white);
 
+        // draw plate
         g.fillOval((int) (this.getWidth() * 0.1), (int) (this.getHeight() * 0.1), (int) (this.getWidth() * 0.8),
                 (int) (this.getHeight() * 0.8));
     }