Remove setBlocked/isBlocked

It accidentally stayed behind. It was undocumented, and removed because
its use tends to be a hack. The one remaining use did nothing:
Signal::emit did not check isBlocked anymore, only EventSignal::emit
did.

Author: RockinRoel

src/Wt/WAbstractItemModel.C

@@ -151,15 +151,11 @@ bool WAbstractItemModel::setItemData(const WModelIndex& index,
 {
   bool result = true;
 
-  bool wasBlocked = dataChanged().isBlocked();
-  dataChanged().setBlocked(true);
-
   for (DataMap::const_iterator i = values.begin(); i != values.end(); ++i)
     // if (i->first != ItemDataRole::Edit)
       if (!setData(index, i->second, i->first))
 	result = false;
 
-  dataChanged().setBlocked(wasBlocked);
   dataChanged().emit(index, index);
 
   return result;

src/Wt/WSignal.C

@@ -17,17 +17,11 @@
 namespace Wt {
 
 SignalBase::SignalBase()
-  : blocked_(false)
 { }
 
 SignalBase::~SignalBase()
 { }
 
-void SignalBase::setBlocked(bool blocked)
-{
-  blocked_ = blocked;
-}
-
 EventSignalBase::EventSignalBase(const char *name, WObject *owner,
 				 bool autoLearn)
   : name_(name), owner_(owner), id_(nextId_++)

src/Wt/WSignal.h

@@ -117,9 +117,6 @@ class WT_API SignalBase
    */
   virtual bool isConnected() const = 0;
 
-  void setBlocked(bool block);
-  bool isBlocked() const { return blocked_; }
-
   /*! \brief Connects to a slot.
    *
    * Every signal can be connected to a slot which does not take any
@@ -141,8 +138,6 @@ class WT_API SignalBase
 
 private:
   SignalBase(const SignalBase& other);
-
-  bool blocked_;
 };
 
 /*
@@ -894,9 +889,6 @@ EventSignal<E>::connect(WObject *target, WObject::Method method)
 template <typename E>
 void EventSignal<E>::emit(E e) const
 {
-  if (isBlocked())
-    return;
-
   processLearnedStateless();
   processNonLearnedStateless();