/*=auto=========================================================================

  Portions (c) Copyright 2005 Brigham and Women's Hospital (BWH) All Rights Reserved.

  See Doc/copyright/copyright.txt
  or http://www.slicer.org/copyright/copyright.txt for details.

  Program:   3D Slicer
  Module:    $RCSfile: vtkSlicerNodeSelectorWidget.h,v $
  Date:      $Date: 2006/01/08 04:48:05 $
  Version:   $Revision: 1.45 $

=========================================================================auto=*/

// .NAME vtkSlicerNodeSelectorWidget - menu to select volumes from current mrml scene
// .SECTION Description
// Inherits most behavior from kw widget, but is specialized to observe
// the current mrml scene and update the entries of the pop up menu to correspond
// to the currently available volumes.  This widget also has a notion of the current selection
// that can be observed or set externally
//


#ifndef __vtkSlicerViewerWidget_h
#define __vtkSlicerViewerWidget_h

#include "vtkSlicerWidget.h"

#include "vtkKWRenderWidget.h"

class vtkMRMLModelDisplayNode;
class vtkPolyData;
class vtkActor;

class VTK_SLICER_BASE_GUI_EXPORT vtkSlicerViewerWidget : public vtkSlicerWidget
{
  
public:
  static vtkSlicerViewerWidget* New();
  vtkTypeRevisionMacro(vtkSlicerViewerWidget,vtkSlicerWidget);
  void PrintSelf(ostream& os, vtkIndent indent);
  
  // Description:
  // alternative method to propagate events generated in GUI to logic / mrml
  virtual void ProcessWidgetEvents ( vtkObject *caller, unsigned long event, void *callData );
  
  // Description:
  // alternative method to propagate events generated in GUI to logic / mrml
  virtual void ProcessMRMLEvents ( vtkObject *caller, unsigned long event, void *callData );
  
  // Description:
  // removes observers on widgets in the class
  virtual void RemoveWidgetObservers ( );

  // Description:
  // removes observers on widgets in the class
  virtual void RemoveMRMLObservers ( );

  vtkGetObjectMacro(MainViewer, vtkKWRenderWidget);
  vtkSetObjectMacro(MainViewer, vtkKWRenderWidget);  

  // Description:
  // return the current actor corresponding to a give MRML ID
  vtkActor *GetActorByID (const char *id);
  
  // Description: 
  // Post a request for a render -- won't be done until the system is
  // idle, and then only once....
  void RequestRender();

  // Description: 
  // Actually do a render (don't wait for idle)
  void Render();

  // Description: 
  // Used to track the fact that there is a idle task pending requesting a render
  vtkSetMacro (RenderPending, int);
  vtkGetMacro (RenderPending, int);

protected:
  vtkSlicerViewerWidget();
  ~vtkSlicerViewerWidget();

  void UpdateFromMRML();

  // Description:
  // Create the widget.
  virtual void CreateWidget();
  
  vtkKWRenderWidget *MainViewer;
  int RenderPending;

  void RemoveProps();

  //BTX
  std::map<const char *, vtkActor *> DisplayedModels;
  //ETX

private:
  
  vtkSlicerViewerWidget(const vtkSlicerViewerWidget&); // Not implemented
  void operator=(const vtkSlicerViewerWidget&); // Not Implemented
};

#endif

