G2DParentNode handles "undefined" child bounds separately

[simantics/platform.git] / bundles / org.simantics.scenegraph / src / org / simantics / scenegraph / utils / GeometryUtils.java

diff --git a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/GeometryUtils.java b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/GeometryUtils.java
index a3f4ec8bee57b770491b4a7da99a606928cf5fc7..cdda4f45c2de18fe4132f6a034c31bcd26dfe799 100644 (file)
--- a/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/GeometryUtils.java
+++ b/bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/GeometryUtils.java
@@ -507,5 +507,75 @@ public final class GeometryUtils {
         //System.out.println("FIT TRANSFORM: " + at);
         return at;
     }
-    
+
+    private static class UndefinedRectangle extends Rectangle2D {
+
+        @Override
+        public void setRect(double x, double y, double w, double h) {
+            throw new UnsupportedOperationException("UndefinedRectangle is immutable");
+        }
+
+        @Override
+        public int outcode(double x, double y) {
+            return OUT_LEFT | OUT_TOP | OUT_RIGHT | OUT_BOTTOM;
+        }
+
+        private Rectangle2D copy(Rectangle2D r) {
+            Rectangle2D dest;
+            if (r instanceof Float) {
+                dest = new Rectangle2D.Float();
+            } else {
+                dest = new Rectangle2D.Double();
+            }
+            dest.setFrame(r);
+            return dest;
+        }
+
+        @Override
+        public Rectangle2D createIntersection(Rectangle2D r) {
+            return copy(r);
+        }
+
+        @Override
+        public Rectangle2D createUnion(Rectangle2D r) {
+            return copy(r);
+        }
+
+        @Override
+        public double getX() {
+            return java.lang.Double.NaN;
+        }
+
+        @Override
+        public double getY() {
+            return java.lang.Double.NaN;
+        }
+
+        @Override
+        public double getWidth() {
+            return 0;
+        }
+
+        @Override
+        public double getHeight() {
+            return 0;
+        }
+
+        @Override
+        public boolean isEmpty() {
+            return true;
+        }
+
+    }
+
+    private static final UndefinedRectangle UNDEFINED_RECTANGLE = new UndefinedRectangle();
+
+    public static Rectangle2D undefinedRectangle() {
+        return UNDEFINED_RECTANGLE;
+    }
+
+    public static boolean isUndefinedRectangle(Rectangle2D r) {
+        return r == UNDEFINED_RECTANGLE || (r.isEmpty() && Double.isNaN(r.getX()) && Double.isNaN(r.getY()));
+    }
+
 }