text: /*=========================================================================
   *
   *  Copyright Insight Software Consortium
   *
   *  Licensed under the Apache License, Version 2.0 (the "License");
   *  you may not use this file except in compliance with the License.
   *  You may obtain a copy of the License at
   *
   *         http://www.apache.org/licenses/LICENSE-2.0.txt
   *
   *  Unless required by applicable law or agreed to in writing, software
   *  distributed under the License is distributed on an "AS IS" BASIS,
   *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *  See the License for the specific language governing permissions and
   *  limitations under the License.
   *
   *=========================================================================*/
  
  #ifndef __itkPyCommand_h
  #define __itkPyCommand_h
  
  #include "itkCommand.h"
  
  // The python header defines _POSIX_C_SOURCE without a preceding #undef
  #undef _POSIX_C_SOURCE
  #include <Python.h>
  
  namespace itk
  {
  
  /** \class PyCommand
   *  \brief Command subclass that calls a Python callable object, e.g.
   *  a Python function.
   *
   * With this class, arbitrary Python callable objects (e.g. functions)
   * can be associated with an instance to be used in AddObserver calls.
   * This is analogous to itk::TclCommand, but then a tad more flexible. ;)
   *
   * This class was contributed by Charl P. Botha <cpbotha |AT| ieee.org>
   */
  class PyCommand : public Command
  {
  public:
    ///! Standard "Self" typedef.
    typedef PyCommand         Self;
  
    ///! Smart pointer typedef support.
    typedef SmartPointer<Self>  Pointer;
  
    ///! Run-time type information (and related methods).
    itkTypeMacro(PyCommand,Command);
  
    ///! Method for creation through the object factory.
    itkNewMacro(Self);
  
    /**
     * Assign a Python callable object to be used.  You don't have to keep
     * a binding to the callable, PyCommand will also take out a reference
     * to make sure the Callable sticks around.
     */
    void SetCommandCallable(PyObject *obj);
  
    PyObject * GetCommandCallable();
  
    void Execute(Object *, const EventObject&);
    void Execute(const Object *, const EventObject&);
  
  protected:
    PyCommand();
    ~PyCommand();
    void PyExecute();
    PyCommand(const Self&);     // Not implemented.
    void operator=(const Self&); // Not implemented.
  
  private:
    PyObject *m_Object;
  };
  
  
  } // namespace itk
  
  #endif // _itkPyCommand_h
  