GraphUI BoxLayout: Margin is only ignored for center Alignment w/o Fill scale. {Box,Grid}Layout: Always remove Bottom-Left delta and refine API doc of incl scale behavior

GraphUI BoxLayout: Margin is only ignored for center Alignment w/o Fill scale.
  Margin outside of a shape is not scaled and hence must be considered
  when using Fill scale.

{Box,Grid}Layout: Always remove Bottom-Left delta
  Previously we were only dropping the negative extend.

  However, since our scale and center algo uses the AABBox width and height,
  which excludes the bottom-left delta, we have to drop such offset.

  TODO: Otherwise, we would need adjust for the bottom-left extend
  when NOT centering for each direction!
  This might be a useful enhancement in case one likes to drop
  shapes as-is w/o centering.

{Box,Grid}Layout: Refine API doc of  incl scale behavior

1 files changed, 10 insertions, 2 deletions

diff --git a/src/demos/com/jogamp/opengl/demos/graph/ui/UILayoutBox01.java b/src/demos/com/jogamp/opengl/demos/graph/ui/UILayoutBox01.java
index 70db5d696..cef57d503 100644
--- a/src/demos/com/jogamp/opengl/demos/graph/ui/UILayoutBox01.java
+++ b/src/demos/com/jogamp/opengl/demos/graph/ui/UILayoutBox01.java
@@ -346,7 +346,15 @@ public class UILayoutBox01 {
             groups.add(g);
         }
         ++id;
+        nextPos.setX( nextPos.x() + sxy * cellGap );
+
+        if( true ) {
+            final Group g = fillDemoGroup(new Group( new BoxLayout( 1f, 1f, Alignment.FillCenter, margin, null ) ),
+                                          reqGLP, scene, zEps, sxy, nextPos, font, id, dragZoomRotateListener);
+            groups.add(g);
+        }
         nextPos.set(0, nextPos.y() + sxy * cellGap, 0);
+        ++id;
 
         //
         // 3. Row
@@ -385,7 +393,7 @@ public class UILayoutBox01 {
         ++id;
 
         if( true ) {
-            final Group g = fillDemoGroup(new Group( new BoxLayout( 1f, 1f, Alignment.Fill, new Margin(), padding ) ),
+            final Group g = fillDemoGroup(new Group( new BoxLayout( 1f, 1f, Alignment.Fill, margin, padding ) ),
                                           reqGLP, scene, zEps, sxy, nextPos, font, id, dragZoomRotateListener);
             groups.add(g);
         }
@@ -393,7 +401,7 @@ public class UILayoutBox01 {
         ++id;
 
         if( true ) {
-            final Group g = fillDemoGroup(new Group( new BoxLayout( 1f, 1f, Alignment.Fill, margin, padding ) ),
+            final Group g = fillDemoGroup(new Group( new BoxLayout( 1f, 1f, Alignment.FillCenter, margin, padding ) ),
                                           reqGLP, scene, zEps, sxy, nextPos, font, id, dragZoomRotateListener);
             groups.add(g);
         }