mitkCallbackFromGUIThread.h

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/*============================================================================
 
The Medical Imaging Interaction Toolkit (MITK)
 
Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.
 
Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.
 
============================================================================*/
 
#ifndef mitkCallbackFromGUIThread_h
#define mitkCallbackFromGUIThread_h
 
#include <MitkCoreExports.h>
#include <itkCommand.h>
#include <itkEventObject.h>
 
namespace mitk
{
  template <class T>
  class CallbackEventOneParameter : public itk::AnyEvent
  {
  public:
    typedef CallbackEventOneParameter Self;
    typedef itk::AnyEvent Superclass;
 
    CallbackEventOneParameter(const T t) : m_Data(t) {}
    ~CallbackEventOneParameter() override {}
    const char *GetEventName() const override { return "CallbackEventOneParameter"; }
    bool CheckEvent(const ::itk::EventObject *e) const override { return dynamic_cast<const Self *>(e); }
    ::itk::EventObject *MakeObject() const override { return new Self(m_Data); }
 
    const T GetData() const { return m_Data; }
    CallbackEventOneParameter(const Self &s) : itk::AnyEvent(s), m_Data(s.m_Data){};
 
  protected:
    const T m_Data;
 
  private:
    void operator=(const Self &);
  };
 
  class MITKCORE_EXPORT CallbackFromGUIThreadImplementation
  {
  public:
    virtual void CallThisFromGUIThread(itk::Command *, itk::EventObject *) = 0;
 
    virtual ~CallbackFromGUIThreadImplementation(){};
 
  protected:
  private:
  };
 
  class MITKCORE_EXPORT CallbackFromGUIThread
  {
  public:
    static CallbackFromGUIThread *GetInstance();
 
    static void RegisterImplementation(CallbackFromGUIThreadImplementation *implementation);
 
    void CallThisFromGUIThread(itk::Command *, itk::EventObject *e = nullptr);
 
  protected:
    CallbackFromGUIThread();
 
  private:
    static CallbackFromGUIThreadImplementation *m_Implementation;
    static CallbackFromGUIThread *m_Instance;
  };
 
} // namespace
 
#endif