fixed an error when gowing backwards in the mode that only shows the current layout

src/bk/BKNodePlacement.java

@@ -88,60 +88,30 @@ public class BKNodePlacement extends AnimatedAlgorithm {
             protected String value(ReadOnlyMemory m) {
                 return "DOWN_RIGHT";
             }
-        }) {
-            @Override
-            public String getDebugOutput( Memory m ) {
-                state = State.LAYOUT1;
-                return super.getDebugOutput( m );
-            }
-        } );
+        }) );
         mainFunction.add( new PseudoCodeNode( "call calcLayout( layout, graph )", vars, tree, new FunctionCall( calcLayout, new String[]{ "layout", "graph" } ) ) );
         mainFunction.add( new PseudoCodeNode( "layout = 'DOWN_LEFT'", vars, tree, new SetVariable<String>( "layout" ) {
             @Override
             protected String value(ReadOnlyMemory m) {
                 return "DOWN_LEFT";
             }
-        }) {
-            @Override
-            public String getDebugOutput( Memory m ) {
-                state = State.LAYOUT2;
-                return super.getDebugOutput( m );
-            }
-        });
+        }));
         mainFunction.add( new PseudoCodeNode( "call calcLayout( layout, graph )", vars, tree, new FunctionCall( calcLayout, new String[]{ "layout", "graph" } ) ) );
         mainFunction.add( new PseudoCodeNode( "layout = 'UP_RIGHT'", vars, tree, new SetVariable<String>( "layout" ) {
             @Override
             protected String value(ReadOnlyMemory m) {
                 return "UP_RIGHT";
             }
-        }) {
-            @Override
-            public String getDebugOutput( Memory m ) {
-                state = State.LAYOUT3;
-                return super.getDebugOutput( m );
-            }
-        } );
+        }) );
         mainFunction.add( new PseudoCodeNode( "call calcLayout( layout, graph )", vars, tree, new FunctionCall( calcLayout, new String[]{ "layout", "graph" } ) ) );
         mainFunction.add( new PseudoCodeNode( "layout = 'UP_LEFT'", vars, tree, new SetVariable<String>( "layout" ) {
             @Override
             protected String value(ReadOnlyMemory m) {
                 return "UP_LEFT";
             }
-        }) {
-            @Override
-            public String getDebugOutput( Memory m ) {
-                state = State.LAYOUT4;
-                return super.getDebugOutput( m );
-            }
-        } );
+        }) );
         mainFunction.add( new PseudoCodeNode( "call calcLayout( layout, graph )", vars, tree, new FunctionCall( calcLayout, new String[]{ "layout", "graph" } ) ) );
-        mainFunction.add( new PseudoCodeNode( "call combine( graph )", vars, tree, new FunctionCall( combine, new String[]{ "graph" } ) ) {
-            @Override
-            public String getDebugOutput( Memory m ) {
-                state = State.COMBINE;
-                return super.getDebugOutput( m );
-            }
-        } );
+        mainFunction.add( new PseudoCodeNode( "call combine( graph )", vars, tree, new FunctionCall( combine, new String[]{ "graph" } ) ) );
         PseudoCodeNode conflictsStage = new PseudoCodeNode( "-- mark type 1 conflicts --", vars, tree, new Comment() ) {
             @Override
             public String getDebugOutput( Memory m ) {
@@ -165,6 +135,23 @@ public class BKNodePlacement extends AnimatedAlgorithm {
                 info +=       "|------|-------|------|------|-------|-----|--------|\n";
                 LayeredGraphNode graph = m.read( "graph", MemoryType.COMPLETE_STACK );
                 LayoutType type = LayoutType.fromString( m.read( "layout", MemoryType.COMPLETE_STACK ) );
+                switch( type ) {
+                case TOP_BOTTOM_LEFT:
+                    state = State.LAYOUT1;
+                    break;
+                case TOP_BOTTOM_RIGHT:
+                    state = State.LAYOUT2;
+                    break;
+                case BOTTOM_TOP_LEFT:
+                    state = State.LAYOUT3;
+                    break;
+                case BOTTOM_TOP_RIGHT:
+                    state = State.LAYOUT4;
+                    break;
+                case COMBINED:
+                    state = State.COMBINE;
+                    break;
+                }
                 for( LayeredGraphNode n : graph.getContainedNodes() )
                 {
                     info += "|" + TextLayoutHelper.strToLen( n.getName(), 6 ) +