-Added shape edge and center indexing, with snap and guideline support.

mdproctor · Feb 11, 2015 · 0fc190f · 0fc190f
1 parent 43d6e48
commit 0fc190f
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diff --git a/src/main/java/com/ait/lienzo/client/core/shape/Rectangle.java b/src/main/java/com/ait/lienzo/client/core/shape/Rectangle.java
@@ -18,10 +18,14 @@
 
 import com.ait.lienzo.client.core.Attribute;
 import com.ait.lienzo.client.core.Context2D;
+import com.ait.lienzo.client.core.event.AttributesChangedEvent;
 import com.ait.lienzo.client.core.shape.json.IFactory;
 import com.ait.lienzo.client.core.shape.json.validators.ValidationContext;
 import com.ait.lienzo.client.core.shape.json.validators.ValidationException;
 import com.ait.lienzo.client.core.types.BoundingBox;
+import com.ait.lienzo.client.core.util.EdgeAndCenterIndex;
+import com.ait.lienzo.client.core.util.EdgeAndCenterIndex.EdgeAndCenterIndexHandler;
+import com.ait.lienzo.client.core.util.EdgeAndCenterIndex.AlignmentCallback;
 import com.ait.lienzo.shared.core.types.ShapeType;
 import com.google.gwt.json.client.JSONObject;
 
@@ -212,4 +216,41 @@ public Rectangle create(final JSONObject node, final ValidationContext ctx) thro
             return new Rectangle(node, ctx);
         }
     }
+
+    @Override
+    public EdgeAndCenterIndexHandler getEdgeAndCenterIndexHandler(EdgeAndCenterIndex edgeAndCenterIndex, AlignmentCallback alignmentCallback)
+    {
+        return new RectangleEdgeAndCenterIndexHandler(this, edgeAndCenterIndex, alignmentCallback);
+    }
+
+    public static class RectangleEdgeAndCenterIndexHandler extends EdgeAndCenterIndexHandler
+    {
+        public RectangleEdgeAndCenterIndexHandler(Rectangle rect, EdgeAndCenterIndex edgeAndCenterIndex, AlignmentCallback alignmentCallback)
+        {
+            super(rect, edgeAndCenterIndex, alignmentCallback, Attribute.X, Attribute.Y, Attribute.WIDTH, Attribute.HEIGHT);
+        }
+
+        public void doOnAttributesChanged(AttributesChangedEvent event)
+        {
+            boolean xChanged = event.has(Attribute.X);
+            boolean yChanged = event.has(Attribute.Y);
+            boolean wChanged = event.has(Attribute.WIDTH);
+            boolean hChanged = event.has(Attribute.HEIGHT);
+
+            if ( !xChanged && !yChanged && !wChanged && !hChanged) {
+                return ;
+            }
+
+            if ( ( xChanged && m_shape.getX() == m_x ) || ( yChanged && m_shape.getY() == m_y )) {
+                // this can happen when the event batching triggers after a drag has stopped, but the event change was due to the dragging.
+                // @dean REVIEW
+                return;
+            }
+
+            capturePositions( m_shape.getX(),  m_shape.getY());
+            updateIndex(xChanged, xChanged || wChanged, xChanged || wChanged,
+                        yChanged, yChanged || hChanged, yChanged || hChanged);
+        }
+    }
+
 }
diff --git a/src/main/java/com/ait/lienzo/client/core/shape/Shape.java b/src/main/java/com/ait/lienzo/client/core/shape/Shape.java
@@ -41,6 +41,7 @@
 import com.ait.lienzo.client.core.types.Point2D;
 import com.ait.lienzo.client.core.types.RadialGradient;
 import com.ait.lienzo.client.core.types.Shadow;
+import com.ait.lienzo.client.core.util.EdgeAndCenterIndex;
 import com.ait.lienzo.client.widget.DefaultDragConstraintEnforcer;
 import com.ait.lienzo.client.widget.DragConstraintEnforcer;
 import com.ait.lienzo.shared.core.types.Color;
@@ -54,6 +55,7 @@
 import com.google.gwt.dom.client.ImageElement;
 import com.google.gwt.json.client.JSONObject;
 import com.google.gwt.json.client.JSONString;
+import com.ait.lienzo.client.core.util.EdgeAndCenterIndex.EdgeAndCenterIndexHandler;
 
 /**
  * Shapes are objects that can be drawn on a canvas.
@@ -1490,6 +1492,10 @@ public T setDragConstraints(final DragConstraintEnforcer enforcer)
         return cast();
     }
 
+    public EdgeAndCenterIndexHandler getEdgeAndCenterIndexHandler(EdgeAndCenterIndex edgeAndCenterIndex, EdgeAndCenterIndex.AlignmentCallback alignmentCallback) {
+        throw new UnsupportedOperationException();
+    }
+
     public static abstract class ShapeFactory<S extends Shape<S>> extends NodeFactory<S>
     {
         protected ShapeFactory(final ShapeType type)