snap rigid components back to the grid

diylc/diylc-core/src/org/diylc/presenter/Presenter.java

@@ -1321,19 +1321,23 @@ public class Presenter implements IPlugInPort {
     Dimension d = drawingManager.getCanvasDimensions(currentProject, 1d, useExtraSpace);
     double extraSpace = useExtraSpace ? drawingManager.getExtraSpace(currentProject) : 0;
     
+    boolean isRigid = true;
+    
     List<Point2D> points = new ArrayList<Point2D>();    
     for (Map.Entry<IDIYComponent<?>, Set<Integer>> entry : controlPointMap.entrySet()) {
       for (Integer i : entry.getValue())
       {
         Point2D p = entry.getKey().getControlPoint(i);
+        if (entry.getKey().canPointMoveFreely(i))
+          isRigid = false;
         points.add(p);
       }
     }
 
     Point2D firstPoint = points.iterator().next();
-    if (points.size() == 1 || points.stream().allMatch((x) -> x.equals(firstPoint))) {    
+    if (points.size() == 1 || points.stream().allMatch((x) -> x.equals(firstPoint)) || (controlPointMap.size() == 1 && isRigid)) {    
-      double avgX = points.stream().mapToDouble((x) -> x.getX()).average().getAsDouble();
+      double avgX = firstPoint.getX();//points.stream().mapToDouble((x) -> x.getX()).average().getAsDouble();
-      double avgY = points.stream().mapToDouble((x) -> x.getY()).average().getAsDouble();      
+      double avgY = firstPoint.getY();//points.stream().mapToDouble((x) -> x.getY()).average().getAsDouble();      
       
       Point2D testPoint = new Point2D.Double(avgX + dx, avgY + dy);      
       if (snapToGrid) {

diylc/diylc-core/src/org/diylc/presenter/update.xml

@@ -3298,6 +3298,10 @@
 					<changeType>IMPROVEMENT</changeType>
 					<description>In cases when there's already a component in the selection that is reduced to nothing, allow moving the selection to avoid getting stuck</description>
 				</org.diylc.appframework.update.Change>
+				<org.diylc.appframework.update.Change>
+					<changeType>IMPROVEMENT</changeType>
+					<description>Moving a rigid component (e.g. tube/transistor symbol) which is not snapped to grid makes it snap back to the grid when 'Snap to Grid' is switched on</description>
+				</org.diylc.appframework.update.Change>		
 				<org.diylc.appframework.update.Change>
 					<changeType>IMPROVEMENT</changeType>
 					<description>Apply context menu rotation and mirroring to Trimmer Potentiometer components</description>