3 files changed, 77 insertions, 55 deletions
diff --git a/core/src/ch/asynk/gdx/boardgame/ui/Container.java b/core/src/ch/asynk/gdx/boardgame/ui/Container.java
new file mode 100644
index 0000000..f12a15d
--- /dev/null
+++ b/core/src/ch/asynk/gdx/boardgame/ui/Container.java
@@ -0,0 +1,75 @@
+package ch.asynk.gdx.boardgame.ui;
+
+import com.badlogic.gdx.graphics.g2d.Batch;
+import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
+
+import ch.asynk.gdx.boardgame.utils.IterableSet;
+
+public class Container extends Element
+{
+    public static int DEFAULT_CHILD_COUNT = 2;
+
+    protected IterableSet<Element> children;
+
+    protected Container()
+    {
+        super();
+        this.children = null;
+    }
+
+    public void add(Element e)
+    {
+        if (children == null)
+            children = new IterableSet<Element>(DEFAULT_CHILD_COUNT);
+        if (children.add(e)) {
+            e.setParent(this);
+        }
+    }
+
+    public void remove(Element e)
+    {
+        if (children != null) {
+            if (children.remove(e)) {
+                e.setParent(null);
+            }
+        }
+    }
+
+    @Override public void taint()
+    {
+        super.taint();
+        if (children != null)
+            children.forEach( c -> c.taint() );
+    }
+
+    @Override public void draw(Batch batch)
+    {
+        if (!visible) return;
+        if (tainted) computeGeometry();
+        if (children != null)
+            children.forEach( c -> c.draw(batch) );
+    }
+
+    @Override public void drawDebug(ShapeRenderer shapeRenderer)
+    {
+        shapeRenderer.rect(getX(), getY(), getWidth(), getHeight());
+        if (children != null)
+            children.forEach( c -> c.drawDebug(shapeRenderer) );
+    }
+
+    @Override public Element touch(float x, float y)
+    {
+        if (super.touch(x, y) != null) {
+            if (children != null) {
+                for (Element e : children) {
+                    final Element t = e.touch(x, y);
+                    if (t != null)
+                        return t;
+                }
+            }
+            return this;
+        }
+        return null;
+    }
+}
+
diff --git a/core/src/ch/asynk/gdx/boardgame/ui/Element.java b/core/src/ch/asynk/gdx/boardgame/ui/Element.java
index 41adf29..5df6587 100644
--- a/core/src/ch/asynk/gdx/boardgame/ui/Element.java
+++ b/core/src/ch/asynk/gdx/boardgame/ui/Element.java
@@ -1,6 +1,5 @@
 package ch.asynk.gdx.boardgame.ui;
 
-import com.badlogic.gdx.graphics.g2d.Batch;
 import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
 import com.badlogic.gdx.math.Rectangle;
 
@@ -8,26 +7,22 @@ import ch.asynk.gdx.boardgame.Drawable;
 import ch.asynk.gdx.boardgame.Paddable;
 import ch.asynk.gdx.boardgame.Positionable;
 import ch.asynk.gdx.boardgame.Touchable;
-import ch.asynk.gdx.boardgame.utils.IterableSet;
 
 public abstract class Element implements Drawable, Paddable, Positionable, Touchable
 {
     public static boolean DEBUG_GEOMETRY = false;
-    public static int DEFAULT_CHILD_COUNT = 2;
 
     public boolean blocked;
     public boolean visible;
     protected float padding;
     protected Element parent;
-    protected Sizing sizing;            // set dimensions according to parent and children
+    protected Sizing sizing;            // sizing policy
     protected Alignment alignment;      // where to position itself
     protected Rectangle rect;           // outer drawing coordinates
     protected float x, y;               // given position
     protected boolean tainted;          // geometry must be computed
     public boolean taintParent;         // propagate tainted state up the tree
 
-    protected IterableSet<Element> children;
-
     protected Element()
     {
         this(false);
@@ -45,7 +40,6 @@ public abstract class Element implements Drawable, Paddable, Positionable, Touch
         this.x = this.y = 0;
         this.tainted = true;
         this.taintParent = taintParent;
-        this.children = null;
     }
 
     @Override public final float getX()         { return rect.x; }
@@ -84,36 +78,12 @@ public abstract class Element implements Drawable, Paddable, Positionable, Touch
         return r;
     }
 
-    public void add(Element e)
-    {
-        if (children == null)
-            children = new IterableSet<Element>(DEFAULT_CHILD_COUNT);
-        if (children.add(e)) {
-            e.setParent(this);
-        }
-    }
-
-    public void remove(Element e)
-    {
-        if (children != null) {
-            if (children.remove(e)) {
-                e.setParent(null);
-            }
-        }
-    }
-
     public void taint()
     {
         this.tainted = true;
         if (parent != null && taintParent) parent.taint();
     }
 
-    public void taintChildren()
-    {
-        if (children != null)
-            children.forEach( c -> c.taint() );
-    }
-
     @Override public void setPosition(float x, float y, float w, float h)
     {
         this.x = x;
@@ -211,29 +181,14 @@ public abstract class Element implements Drawable, Paddable, Positionable, Touch
         this.tainted = false;
     }
 
-    public void drawChildren(Batch batch)
-    {
-        if (children != null)
-            children.forEach( c -> c.draw(batch) );
-    }
-
     @Override public void drawDebug(ShapeRenderer shapeRenderer)
     {
         shapeRenderer.rect(getX(), getY(), getWidth(), getHeight());
-        if (children != null)
-            children.forEach( c -> c.drawDebug(shapeRenderer) );
     }
 
     @Override public Element touch(float x, float y)
     {
         if (!blocked && visible && rect.contains(x, y)) {
-            if (children != null) {
-                for (Element e : children) {
-                    final Element t = e.touch(x, y);
-                    if (t != null)
-                        return t;
-                }
-            }
             return this;
         }
         return null;
diff --git a/core/src/ch/asynk/gdx/boardgame/ui/Root.java b/core/src/ch/asynk/gdx/boardgame/ui/Root.java
index c84287b..c3ad0c3 100644
--- a/core/src/ch/asynk/gdx/boardgame/ui/Root.java
+++ b/core/src/ch/asynk/gdx/boardgame/ui/Root.java
@@ -5,7 +5,7 @@ import com.badlogic.gdx.math.Rectangle;
 
 import ch.asynk.gdx.boardgame.utils.IterableSet;
 
-public class Root extends Element
+public class Root extends Container
 {
     private Element touched;
 
@@ -29,7 +29,6 @@ public class Root extends Element
     {
         setPosition(x, y, width, height);
         taint();
-        taintChildren();
     }
 
     public Element touched()
@@ -52,11 +51,4 @@ public class Root extends Element
         }
         return false;
     }
-
-    @Override public void draw(Batch batch)
-    {
-        if (!visible) return;
-        if (tainted) computeGeometry();
-        children.forEach( c -> c.draw(batch) );
-    }
 }