imtbase::TModelUpdateBinder< ModelInterface, Parent >

#include <TModelUpdateBinder.h>

Inherits imod::CMultiModelDispatcherBase.

Detailed Description

template<typename ModelInterface, typename Parent>
class imtbase::TModelUpdateBinder< ModelInterface, Parent >

Helper for managing data change notifications from sub-models. In the context of an observer of some hierarchical data model it is usefull to have a mechanism for the reaction on changes of a sub-model.

class IAddress: public istd::IChangeable
{
public:
       virtual QString GetCity() const = 0;
};
 
class IUser: public istd::IChangeable
{
public:
       virutal const QString GetName() const = 0; // Observed data model
 
       virutal const IAddress* GetAddress() const = 0; // Sub-model
};
 
class UserObserver: public imod::TSingleModelObserverBase<IUser>
{
public:
       // reimplemented (imod::IObserver)
       virtual bool OnModelAttached(imod::IModel* modelPtr, istd::IChangeable::ChangeSet& changeMask);
       {
              IUser* userPtr = GetObservedObject();
 
              m_addressObserver.RegisterObject(
                                   userPtr->GetAddress(),
                                   &UserObserver::OnAddressUpdated);
       }
 
private:
       void OnAddressUpdated(const istd::IChangeable::ChangeSet& changeSet, const IAddress* addressPtr)
       {
              // Some reaction on the update of the sub-model (Address)
       }
 
private:
       mutable imtbase::TModelUpdateBinder<IAddress, UserObserver> m_addressObserver;
};

Definition at line 59 of file TModelUpdateBinder.h.