diff --git a/java/org/artisanlogiciel/games/maze/gui/Display.java b/java/org/artisanlogiciel/games/maze/gui/Display.java
index 9f9cd2f..abd2c2d 100644
--- a/java/org/artisanlogiciel/games/maze/gui/Display.java
+++ b/java/org/artisanlogiciel/games/maze/gui/Display.java
@@ -4,6 +4,7 @@ import org.artisanlogiciel.games.maze.LabyModel;
 import org.artisanlogiciel.games.maze.Maze;
 import org.artisanlogiciel.games.maze.MazeParams;
 import org.artisanlogiciel.games.maze.MazeParamsFixed;
+import org.artisanlogiciel.games.maze.model.WidthHeightProvider;
 import org.artisanlogiciel.games.maze.persist.MazePersistRaw;
 import org.artisanlogiciel.games.maze.solve.SolvingModel;
 import org.artisanlogiciel.graphics.Drawing;
@@ -50,7 +51,7 @@ implements StatusListener
 
     boolean statusEnable = true;
     boolean mGrow = false;
-    boolean mHexagon = false;
+
 
     JTextField statusField = null;
 
@@ -58,11 +59,19 @@ implements StatusListener
 
     MazeFrame mazeFrame;
 
+    WidthHeightProvider frameSize = null;
+
+    public void setHexagon(boolean hexagon) {
+        addStatus(hexagon ? "hexagon" : "square");
+        maze.resetCellRenderer(hexagon, frameSize);
+    }
+
     private class MazeFrame extends JFrame
     {
-        MazeFrame(LabyModel model, int W, int H, MazeParams params) {
+        MazeFrame(LabyModel model, WidthHeightProvider frame, MazeParams params) {
             super(MazeDefault.labels.getString("title"));
-            maze = createMazeComponent(model, W, H);
+            frameSize = frame;
+            maze = createMazeComponent(model, frame);
 
             Container con = this.getContentPane();
             JScrollPane scrollableMaze = new JScrollPane(maze);
@@ -85,26 +94,25 @@ implements StatusListener
 
             model.setMazeListener(maze);
             setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
-            setBounds(W, H, W, H);
+            setBounds(frame.getWidth(), frame.getHeight(), frame.getWidth(), frame.getHeight());
             setVisible(true);
         }
 
     }
 
-    public Display(LabyModel model, int W, int H, MazeParams params)
+    public Display(LabyModel model, WidthHeightProvider frame, MazeParams params)
     {
         super(model);
-        mazeFrame = new MazeFrame(model,W,H,params);
+        mazeFrame = new MazeFrame(model, frame,params);
         if (params != null) {
             // fixedParams = new MazeParamsFixed(params.getSaveDir(),params.getWidth(),params.getHeight(),params.getMaxDepth());
             this.params = params;
         }
     }
 
-    private MazeComponent createMazeComponent(LabyModel model, int W, int H) {
+    private MazeComponent createMazeComponent(LabyModel model, WidthHeightProvider frame) {
 
-        MazeCellRenderer cp = mHexagon ? new HexagonCellRenderer(model.getWidth(), model.getHeight(), W, H, 0, 0) : new MazeCellRenderer(model.getWidth(), model.getHeight(), W, H, 0, 0);
-        MazeComponent comp = new MazeComponent(model, cp, this);
+        MazeComponent comp = new MazeComponent(model, frame , this);
         Xpm xpm = new Xpm();
         try {
             xpm.parse(new FileInputStream(MazeDefault.getInstance().getXpmBackground()));
@@ -226,8 +234,8 @@ implements StatusListener
         return button;
     }
 
-    private static void setupDisplay(LabyModel model, int W, int H, MazeParams params) {
-        Display display = new Display(model, W, H, params);
+    private static void setupDisplay(LabyModel model, WidthHeightProvider frame, MazeParams params) {
+        Display display = new Display(model, frame, params);
     }
 
 
@@ -251,8 +259,17 @@ implements StatusListener
 
     public static void main(String pArgs[]) {
         LabyModel model = null;
-        int W = 600;
-        int H = 400;
+        WidthHeightProvider frame = new WidthHeightProvider() {
+            @Override
+            public int getWidth() {
+                return 600;
+            }
+
+            @Override
+            public int getHeight() {
+                return 400;
+            }
+        };
 
         System.out.println("Default Locale " + Locale.getDefault());
 
@@ -264,12 +281,12 @@ implements StatusListener
                 System.exit(1);
             }
 
-            setupDisplay(model, W, H, null);
+            setupDisplay(model, frame, null);
         } else {
             MazeParamsFixed params = new MazeParamsFixed(MazeDefault.getInstance().getParams());
             model = new LabyModel(params);
 
-            setupDisplay(model, W, H, params);
+            setupDisplay(model, frame, params);
 
 	    /*
             model.generateWithEntry(0, 0);
diff --git a/java/org/artisanlogiciel/games/maze/gui/HexagonCellRenderer.java b/java/org/artisanlogiciel/games/maze/gui/HexagonCellRenderer.java
index 37e1bbe..5188c97 100644
--- a/java/org/artisanlogiciel/games/maze/gui/HexagonCellRenderer.java
+++ b/java/org/artisanlogiciel/games/maze/gui/HexagonCellRenderer.java
@@ -1,6 +1,7 @@
 package org.artisanlogiciel.games.maze.gui;
 
 import org.artisanlogiciel.games.maze.Brick;
+import org.artisanlogiciel.games.maze.model.WidthHeightProvider;
 
 import java.awt.*;
 
@@ -13,15 +14,16 @@ public class HexagonCellRenderer
 extends MazeCellRenderer
 {
     public final static int SUBCELL = 4;
+    public final static int SUBCELLY = 3;
 
-    public HexagonCellRenderer(int mapw, int maph, int W, int H, int x, int y) {
-        super(mapw, maph, W, H, x, y);
+    public HexagonCellRenderer(WidthHeightProvider model, WidthHeightProvider frame, int x, int y) {
+        super(model, frame, x, y);
     }
 
     void drawLine(Graphics g, int refx, int refy, int x, int y, int a, int b) {
         g.drawLine(
-                (int) ((refx + x) * getWidth() / SUBCELL), (int) ((refy + y) * getHeight() / SUBCELL),
-                (int) ((refx + a) * getWidth() / SUBCELL),(int) ((refy + b) * getHeight() / SUBCELL));
+                (int) ((refx + x) * width / SUBCELL), (int) ((refy + y) * height / SUBCELL),
+                (int) ((refx + a) * width / SUBCELL),(int) ((refy + b) * height / SUBCELL));
     }
 
     @Override
@@ -87,4 +89,8 @@ extends MazeCellRenderer
         // E : (4,3) - (4,1)
     }
 
+    @Override
+    public double getHeight() {
+        return height * SUBCELLY / SUBCELL;
+    }
 }
diff --git a/java/org/artisanlogiciel/games/maze/gui/MazeCellRenderer.java b/java/org/artisanlogiciel/games/maze/gui/MazeCellRenderer.java
index 5615ff9..145cb9a 100644
--- a/java/org/artisanlogiciel/games/maze/gui/MazeCellRenderer.java
+++ b/java/org/artisanlogiciel/games/maze/gui/MazeCellRenderer.java
@@ -3,6 +3,7 @@ package org.artisanlogiciel.games.maze.gui;
 import org.artisanlogiciel.games.maze.Brick;
 import org.artisanlogiciel.games.maze.LabyModel;
 import org.artisanlogiciel.games.maze.Position;
+import org.artisanlogiciel.games.maze.model.WidthHeightProvider;
 import org.artisanlogiciel.games.maze.solve.DirectionPosition;
 
 import java.awt.*;
@@ -18,17 +19,16 @@ public class MazeCellRenderer {
     double width; // width of one cell in pixels
     double height; // height of one cell in pixels
 
-    public MazeCellRenderer(int mapw, int maph, int W, int H, int x, int y) {
-        mapWidth = mapw;
-        mapHeight = maph;
+    public MazeCellRenderer(WidthHeightProvider model, WidthHeightProvider frame, int x, int y) {
+        resetMazeWidthHeight(model);
         offsetX = x;
         offsetY = y;
-        adaptTo(W,H);
+        adaptTo(frame.getWidth(), frame.getHeight());
     }
 
-    public void resetMazeWidthHeight(int mapw, int maph) {
-        mapWidth = mapw;
-        mapHeight = maph;
+    public void resetMazeWidthHeight(WidthHeightProvider model) {
+        mapWidth = model.getWidth();
+        mapHeight = model.getHeight();
     }
 
     public void adaptTo(double W, double H) {
@@ -108,30 +108,31 @@ public class MazeCellRenderer {
         if (dp != null) {
             boolean arrow = true;
             Position dot = dp.getPosition();
+            double h = getHeight();
             if ((dot.getX() >= pX) && (dot.getY() >= pY) && (dot.getX() < mX) && (dot.getY() < mY)) {
                 int x = offsetX + (int) (dot.getX() * width);
-                int y = offsetY + (int) (dot.getY() * height);
+                int y = offsetY + (int) (dot.getY() * h);
                 short path = dp.getDirection();
                 int xm = x + (int) (width / 2);
-                int ym = y + (int) (height / 2);
+                int ym = y + (int) (h / 2);
                 if (LabyModel.isFlagSet(path,LabyModel.HORIZONTAL)) {
                     if (LabyModel.isFlagSet(path, LabyModel.POSITIVE)) {
-                        g.drawLine(xm, ym - (int) (height / 4), x + (int) width, ym);
+                        g.drawLine(xm, ym - (int) (h / 4), x + (int) width, ym);
                         if (arrow ) g.drawLine(xm, ym, x + (int) width, ym);
-                        g.drawLine(xm, ym + (int) (height / 4), x + (int) width, ym);
+                        g.drawLine(xm, ym + (int) (h / 4), x + (int) width, ym);
                     }
                     // LEFT /_
                     if (LabyModel.isFlagSet(path,LabyModel.NEGATIVE)) {
-                        g.drawLine(x, ym, xm, ym + (int) (height / 4));
+                        g.drawLine(x, ym, xm, ym + (int) (h / 4));
                         if (arrow) g.drawLine(x, ym, xm, ym);
-                        g.drawLine(x, ym, xm, ym - (int) (height / 4));
+                        g.drawLine(x, ym, xm, ym - (int) (h / 4));
                     }
                 }
                 if (LabyModel.isFlagSet(path,LabyModel.VERTICAL)) {
                     if (LabyModel.isFlagSet(path    ,LabyModel.POSITIVE)) {
-                        g.drawLine(xm + (int) (width / 4), ym, xm, y + (int) height);
+                        g.drawLine(xm + (int) (width / 4), ym, xm, y + (int) h);
                         if (arrow) g.drawLine(xm, ym, xm, y + (int) height);
-                        g.drawLine(xm - (int) (width / 4), ym, xm, y + (int) height);
+                        g.drawLine(xm - (int) (width / 4), ym, xm, y + (int) h);
                     }
                     // UP |\
                     if (LabyModel.isFlagSet(path,LabyModel.NEGATIVE)) {
@@ -145,11 +146,12 @@ public class MazeCellRenderer {
     }
 
     public void drawDot(Graphics g, Position dot, int pX, int pY, int mX, int mY) {
-        double radius = (height > width) ? width : height;
+        double h = getHeight();
+        double radius = (h > width) ? width : h;
         int a = (int) (radius / 4);
         if ((dot.getX() >= pX) && (dot.getY() >= pY) && (dot.getX() < mX) && (dot.getY() < mY)) {
             int x = offsetX + (int) (dot.getX() * width);
-            int y = offsetY + (int) (dot.getY() * height);
+            int y = offsetY + (int) (dot.getY() * h);
             int r2 = (int) radius ; //(int) ((radius * 3) / 4);
             g.drawOval(x, y, r2, r2);
             // g.drawLine(x+a,y+a,x+width-a,y+height-a);
@@ -157,8 +159,8 @@ public class MazeCellRenderer {
 
         } else {
             int x = offsetX + (int) (pX * width);
-            int y = offsetY + (int) (pY * height);
-            g.drawLine(x + 1, y + 1, x + (int) width - 1, y + (int) height - 1);
+            int y = offsetY + (int) (pY * h);
+            g.drawLine(x + 1, y + 1, x + (int) width - 1, y + (int) h - 1);
         }
     }
 
diff --git a/java/org/artisanlogiciel/games/maze/gui/MazeComponent.java b/java/org/artisanlogiciel/games/maze/gui/MazeComponent.java
index c8aad3a..a4f9207 100644
--- a/java/org/artisanlogiciel/games/maze/gui/MazeComponent.java
+++ b/java/org/artisanlogiciel/games/maze/gui/MazeComponent.java
@@ -2,6 +2,7 @@ package org.artisanlogiciel.games.maze.gui;
 
 import org.artisanlogiciel.games.maze.*;
 import org.artisanlogiciel.games.maze.model.LabyModelProvider;
+import org.artisanlogiciel.games.maze.model.WidthHeightProvider;
 import org.artisanlogiciel.games.maze.solve.DirectionPosition;
 import org.artisanlogiciel.games.maze.solve.MazeResolutionListener;
 import org.artisanlogiciel.graphics.Drawing;
@@ -27,7 +28,7 @@ public class MazeComponent
     private static final long serialVersionUID = 3163272907991176390L;
 
     LabyModelProvider map;
-    final MazeCellRenderer cp;
+    MazeCellRenderer cp;
     Position current = null;
     LinkedList<DirectionPosition> solvedPath = null;
     LinkedList<DirectionPosition> drawingPath = null;
@@ -51,6 +52,14 @@ public class MazeComponent
 
     StatusListener statusListener;
 
+    MazeCellRenderer createCellRenderer(boolean hexagon, WidthHeightProvider model, WidthHeightProvider frame)
+    {
+        MazeCellRenderer cellRenderer = hexagon ?
+                new HexagonCellRenderer(model, frame, 0, 0)
+                : new MazeCellRenderer(model, frame, 0, 0);
+        return cellRenderer;
+    }
+
     MazeColorMap colorMap = new MazeColorMap(Color.white, Color.black, Color.blue, Color.green, Color.red);
 
     public class MazeColorMap
@@ -216,17 +225,22 @@ public class MazeComponent
      * offsetX, offsetY of upper left corner
      **/
     // public MazeComponent(WallsProvider map, MazeCellParameters cp)
-    public MazeComponent(LabyModel map, MazeCellRenderer cp, StatusListener statusListener) {
+    public MazeComponent(LabyModel map, WidthHeightProvider frame, StatusListener statusListener) {
         super();
-        this.cp = cp;
         this.map = map;
-        setPreferredSize(cp.getDimension());
         gX = map.getWidth() - 1;
         gY = map.getHeight() - 1;
+        resetCellRenderer(false,frame);
         this.statusListener = statusListener;
         addMouseMotionListener(this);
     }
 
+    public void resetCellRenderer(boolean hexagon, WidthHeightProvider frame)
+    {
+        cp = createCellRenderer(hexagon,map,frame);
+        setPreferredSize(cp.getDimension());
+    }
+
     // public void resetWallsProvider(WallsProvider map)
     public void resetWallsProvider(LabyModel map) {
         this.map = map;
@@ -235,7 +249,7 @@ public class MazeComponent
         drawingPath = null;
         sX = 0;
         sY = 0;
-        cp.resetMazeWidthHeight(map.getWidth(), map.getHeight());
+        cp.resetMazeWidthHeight(map);
         setPreferredSize(cp.getDimension());
     }
 
diff --git a/java/org/artisanlogiciel/games/maze/gui/MazeControler.java b/java/org/artisanlogiciel/games/maze/gui/MazeControler.java
index 42f97ab..5c86942 100644
--- a/java/org/artisanlogiciel/games/maze/gui/MazeControler.java
+++ b/java/org/artisanlogiciel/games/maze/gui/MazeControler.java
@@ -388,11 +388,18 @@ public class MazeControler extends JPanel {
                 display.setAutoSize(autoSlide.isSelected());
             }
         });
+        final JCheckBox hexagon = new JCheckBox("hexagon");
+        hexagon.addChangeListener(new ChangeListener() {
+            public void stateChanged(ChangeEvent e) {
+                display.setHexagon(hexagon.isSelected());
+            }
+        });
 
         JPanel resizecontrol = new JPanel(new FlowLayout());
         resizecontrol.add(showAll);
         resizecontrol.add(slider);
         resizecontrol.add(autoSlide);
+        resizecontrol.add(hexagon);
 
         return resizecontrol;