protected void pickContainedVertices(VisualizationViewer<V,E> vv,Point2D down,Point2D out,boolean clear){
  Layout<V,E> layout=vv.getGraphLayout();
  PickedState<V> pickedVertexState=vv.getPickedVertexState();
  Rectangle2D pickRectangle=new Rectangle2D.Double();
  pickRectangle.setFrameFromDiagonal(down,out);
  if (pickedVertexState != null) {
    if (clear) {
      pickedVertexState.clear();
    }
    GraphElementAccessor<V,E> pickSupport=vv.getPickSupport();
    Collection<V> picked=pickSupport.getVertices(layout,pickRectangle);
    for (    V v : picked) {
      pickedVertexState.pick(v,true);
    }
  }
}

protected void pickContainedVertices ( VisualizationViewer < V , E > vv , Point2D down , Point2D out , boolean clear ) { Layout < V , E > layout = vv . getGraphLayout ( ) ; PickedState < V > pickedVertexState = vv . getPickedVertexState ( ) ; Rectangle2D pickRectangle = new Rectangle2D . Double ( ) ; pickRectangle . setFrameFromDiagonal ( down , out ) ; if ( pickedVertexState != null ) { if ( clear ) { pickedVertexState . clear ( ) ; } GraphElementAccessor < V , E > pickSupport = vv . getPickSupport ( ) ; Collection < V > picked = pickSupport . getVertices ( layout , pickRectangle ) ; for ( V v : picked ) { pickedVertexState . pick ( v , true ) ; } } }
pick the vertices inside the rectangle created from points ' down ' and ' out ' ( two diagonally opposed corners of the rectangle )
