/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkResliceImageViewerMeasurements.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
// .NAME vtkResliceImageViewerMeasurements - Manage measurements on a resliced image
// .SECTION Description
// This class manages measurements on the resliced image. It toggles the
// the visibility of the measurements based on whether the resliced image
// is the same orientation as when the measurement was initially placed.
// .SECTION see also
// vtkResliceCursor vtkResliceCursorWidget vtkResliceCursorRepresentation

#ifndef __vtkResliceImageViewerMeasurements_h
#define __vtkResliceImageViewerMeasurements_h

#include "vtkObject.h"

class vtkResliceImageViewer;
class vtkAbstractWidget;
class vtkCallbackCommand;
class vtkCollection;
class vtkDistanceWidget;
class vtkAngleWidget;
class vtkBiDimensionalWidget;
class vtkHandleRepresentation;
class vtkHandleWidget;
class vtkCaptionWidget;
class vtkContourWidget;
class vtkSeedWidget;

class VTK_WIDGETS_EXPORT vtkResliceImageViewerMeasurements : public vtkObject
{
public:

  // Description:
  // Standard VTK methods.
  static vtkResliceImageViewerMeasurements *New();
  vtkTypeMacro(vtkResliceImageViewerMeasurements,vtkObject);
  void PrintSelf(ostream& os, vtkIndent indent);

  // Description:
  // Render the measurements.
  virtual void Render();

  // Description:
  // Add / remove a measurement widget
  virtual void AddItem(vtkAbstractWidget *);
  virtual void RemoveItem(vtkAbstractWidget *);
  virtual void RemoveAllItems();

  // Description:
  // Methods to change whether the widget responds to interaction.
  // Set this to Off to disable interaction. On by default.
  // Subclasses must overide SetProcessEvents() to make sure
  // that they pass on the flag to all component widgets.
  vtkSetClampMacro(ProcessEvents, int, 0, 1);
  vtkGetMacro(ProcessEvents, int);
  vtkBooleanMacro(ProcessEvents, int);

  // Description:
  // Tolerance for Point-in-Plane check
  vtkSetMacro( Tolerance, double );
  vtkGetMacro( Tolerance, double );

  // Description:
  // Set the reslice image viewer. This is automatically done in the class
  // vtkResliceImageViewer
  virtual void SetResliceImageViewer( vtkResliceImageViewer * );
  vtkGetObjectMacro( ResliceImageViewer, vtkResliceImageViewer );

  // Description:
  // Update the measurements. This is automatically called when the reslice
  // cursor's axes are change.
  virtual void Update();

protected:
  vtkResliceImageViewerMeasurements();
  ~vtkResliceImageViewerMeasurements();

  // Description:
  // Check if a measurement widget is on the resliced plane.
  bool IsItemOnReslicedPlane( vtkAbstractWidget * w );
  bool IsWidgetOnReslicedPlane( vtkDistanceWidget * w );
  bool IsWidgetOnReslicedPlane( vtkAngleWidget * w );
  bool IsWidgetOnReslicedPlane( vtkBiDimensionalWidget * w );
  bool IsWidgetOnReslicedPlane( vtkCaptionWidget * w );
  bool IsWidgetOnReslicedPlane( vtkContourWidget * w );
  bool IsWidgetOnReslicedPlane( vtkSeedWidget * w );
  bool IsWidgetOnReslicedPlane( vtkHandleWidget * w );
  bool IsPointOnReslicedPlane( vtkHandleRepresentation * h );
  bool IsPositionOnReslicedPlane( double p[3] );

  // Handles the events; centralized here for all widgets.
  static void ProcessEventsHandler(vtkObject* object, unsigned long event,
                            void* clientdata, void* calldata);

  vtkResliceImageViewer * ResliceImageViewer;
  vtkCollection         * WidgetCollection;

  // Handle the visibility of the measurements.
  vtkCallbackCommand    * EventCallbackCommand; //

  // Flag indicating if we should handle events.
  // On by default.
  int ProcessEvents;

  // Tolerance for Point-in-plane computation
  double Tolerance;

private:
  vtkResliceImageViewerMeasurements(const vtkResliceImageViewerMeasurements&);  // Not implemented.
  void operator=(const vtkResliceImageViewerMeasurements&);  // Not implemented.
};

#endif
