fixes #13

src/bk/BKNodePlacement.java

@@ -65,11 +65,13 @@ public class BKNodePlacement extends AnimatedAlgorithm {
 
     @Override
     public StageStatus forwardStep() {
+        graph.unselectGraph();
         return forward( "forwardStep" );
     }
 
     @Override
     public StageStatus backwardStep() {
+        graph.unselectGraph();
         return backward( "backwardStep" );
     }
 

src/graph/LayeredNode.java

@@ -330,29 +330,19 @@ public class LayeredNode implements LayeredGraphNode {
     @Override
     public boolean isSelected(LayoutType layout) {
         if (layout == LayoutType.TOP_BOTTOM_LEFT) {
-            boolean tmp = layouts[0].selected;
-            layouts[0].selected = false;
-            return tmp;
+            return layouts[0].selected;
         }
         if (layout == LayoutType.TOP_BOTTOM_RIGHT) {
-            boolean tmp = layouts[1].selected;
-            layouts[1].selected = false;
-            return tmp;
+            return layouts[1].selected;
         }
         if (layout == LayoutType.BOTTOM_TOP_LEFT) {
-            boolean tmp = layouts[2].selected;
-            layouts[2].selected = false;
-            return tmp;
+            return layouts[2].selected;
         }
         if (layout == LayoutType.BOTTOM_TOP_RIGHT) {
-            boolean tmp = layouts[3].selected;
-            layouts[3].selected = false;
-            return tmp;
+            return layouts[3].selected;
         }
         if (layout == LayoutType.COMBINED) {
-            boolean tmp = combined.selected;
-            combined.selected = false;
-            return tmp;
+            return combined.selected;
         }
         return false;
     }