Dali::Signal< _Signature > Class Template Reference

Base Template class to provide signals. More...

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Detailed Description

template<typename _Signature>
class Dali::Signal< _Signature >

Base Template class to provide signals.

To create a signal for this class, you first have to define a typedef within your handle's scope:

 class MyHandle : public Handle
 {
 public:

   // Typedefs

   typedef Signal< void ()> VoidSignalType;         
   typedef Signal< bool ()> BoolSignalType;         
   typedef Signal< void ( float )> ParamSignalType; 

   ...

 public:

   // Signals

   VoidSignalType&  VoidSignal();
   BoolSignalType&  BoolSignal();
   ParamSignalType& ParamSignal();

   ...
 };

The methods are required in the handle class so that the application writer can retrieve the Signal in order to connect/disconnect.

In the implementation class, the members should be defined and the methods should be provided to retrieve the signal itself. These will be called by the equivalent methods in the MyHandle class.

 class MyObject : public Object
 {
   ...

 public:

   MyHandle::VoidSignalType&  VoidSignal()
   {
     return mVoidSignal;
   }

   MyHandle::BoolSignalType&  BoolSignal()
   {
     return mBoolSignal;
   }

   MyHandle::ParamSignalType& ParamSignal()
   {
     return mParamSignal;
   }

 private:

   // Signals
   MyHandle::VoidSignalType   mVoidSignal;
   MyHandle::BoolSignalType   mBoolSignal;
   MyHandle::ParamSignalType  mParamSignal;

   ...
 };

Since:

2.4, DALi version 1.0.0