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

   Program: ParaView
   Module:    pqPipelineRepresentation.h

   Copyright (c) 2005-2008 Sandia Corporation, Kitware Inc.
   All rights reserved.

   ParaView is a free software; you can redistribute it and/or modify it
   under the terms of the ParaView license version 1.2. 

   See License_v1.2.txt for the full ParaView license.
   A copy of this license can be obtained by contacting
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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=========================================================================*/

/// \file pqPipelineRepresentation.h
/// \date 4/24/2006

#ifndef _pqPipelineRepresentation_h
#define _pqPipelineRepresentation_h


#include "pqDataRepresentation.h"
#include <QPair>

class pqPipelineRepresentationInternal;
class pqPipelineSource;
class pqRenderViewModule;
class pqServer;
class vtkPVArrayInformation;
class vtkPVDataSetAttributesInformation;
class vtkPVDataSetAttributesInformation;
class vtkSMPropRepresentationProxy;

/// This is PQ representation for a single display. A pqRepresentation represents
/// a single vtkSMPropRepresentationProxy. The display can be added to
/// only one render module or more (ofcouse on the same server, this class
/// doesn't worry about that.
class PQCORE_EXPORT pqPipelineRepresentation : public pqDataRepresentation
{
  Q_OBJECT
  typedef pqDataRepresentation Superclass;
public:
  // Constructor.
  // \c group :- smgroup in which the proxy has been registered.
  // \c name  :- smname as which the proxy has been registered.
  // \c repr  :- the representation proxy.
  // \c server:- server on which the proxy is created.
  // \c parent:- QObject parent.
  pqPipelineRepresentation( const QString& group, 
                            const QString& name,
                            vtkSMProxy* repr, 
                            pqServer* server,
                            QObject* parent=NULL);
  virtual ~pqPipelineRepresentation();

  /// The field name used to indicate solid color.
  static const char* solidColor() { return "Solid Color"; }


  // Get the internal display proxy.
  vtkSMPropRepresentationProxy* getRepresentationProxy() const;

  // Sets the default color mapping for the display.
  // The rules are:
  // If the source created a NEW point scalar array, use it.
  // Else if the source created a NEW cell scalar array, use it.
  // Else if the input color by array exists in this source, use it.
  // Else color by property.
  virtual void setDefaultPropertyValues();

  // Call to select the coloring array. 
  void colorByArray(const char* arrayname, int fieldtype);

  /// Get the names of the arrays that a part may be colored by.
  /// This information may change based on the current reprentation
  /// of the display, eg. when showing Outline, only "Solid Color" is
  /// available; when rendering as Volume, can be colored only by 
  /// point data.
  QList<QString> getColorFields();

  /// get the data range for a particular component. if component == -1,
  /// range for the vector magnitude is returned.
  QPair<double, double> getColorFieldRange(const QString& array, int component);

  /// Returns the range for the currently selected color field i.e.
  /// the range for the array component (or magnitude) of the array by which
  /// this display is being colored, if at all.
  QPair<double, double> getColorFieldRange();

  /// Returns if the array (non-qualified array name) is a partial array in the
  /// indicated fieldType.
  /// fieldType=vtkSMDataRepresentationProxy::POINT_DATA|CELL_DATA etc.
  bool isPartial(const QString& array, int fieldType) const;

  /// set the array to color the part by
  void setColorField(const QString& field);

  /// get the array the part is colored by
  /// if raw is true, it will not add (point) or (cell) but simply
  /// return the array name
  QString getColorField(bool raw=false);

  /// Returns the number of components for the given field.
  /// field is a string of format "<arrayname> (cell|point)".
  int getColorFieldNumberOfComponents(const QString& field);

  /// Returns the proxy for the piecewise function used to
  /// map scalars to opacity.
  virtual vtkSMProxy* getScalarOpacityFunctionProxy();

  /// Returns the pqScalarOpacityFunction object for the piecewise
  /// function used to map scalars to opacity.
  virtual pqScalarOpacityFunction* getScalarOpacityFunction();

  /// Set representation on the proxy.
  /// If representation is changed to volume, this method ensures that the
  /// scalar array is initialized.
  void setRepresentation(int type);

  /// Returns the type of representation currently used i.e.
  //SURFACE/POINTS/VOLUME etc.
  int getRepresentationType() const;

  /// Returns the opacity.
  double getOpacity() const;


  void setColor(double R,double G,double B);



  /// Get/Set the application wide setting for unstructured grid outline
  /// threshold. If the unstructured grid number of cells exceeds this limit, it
  /// will be rendered as outline by default. The value is in million cells.
  static void setUnstructuredGridOutlineThreshold(double millioncells);
  static double getUnstructuredGridOutlineThreshold();
signals:
  /// This is fire when any property that affects the color
  /// mode for the display changes.
  void colorChanged();

public slots:
  // If lookuptable is set up and is used for coloring,
  // then calling this method resets the table ranges to match the current 
  // range of the selected array.
  void resetLookupTableScalarRange();

  // If lookuptable is set up and is used for coloring,
  // then calling this method resets the table ranges to match the 
  // range of the selected array over time. This can potentially be a slow
  // processes hence use with caution!!!
  void resetLookupTableScalarRangeOverTime();

  /// If color lookuptable is set up and coloring is enabled, the this
  /// ensure that the lookuptable scalar range is greater than than the
  /// color array's scalar range. It also updates the scalar range on
  /// the scalar-opacity function, if any. Both the ColorLUT and the 
  /// ScalarOpacityFunction may choose to ignore the set scalar range
  /// based on value ScalePointsWithRange.
  void updateLookupTableScalarRange();

protected slots:
  /// Called when the "Representation" property changes. If
  /// representation changes to "Volume", we have to ensure that
  /// the color field is initialized to something other than
  /// "Solid Color" otherwise the volume mapper segfaults.
  void onRepresentationChanged();

  /// called when this representations visibility changes. We check if the LUT
  /// used to color this repr is being used by any other repr. If not, we turn off
  /// the scalar bar.
  void updateScalarBarVisibility(bool visible);

  /// Called when the data is updated. We call updateLookupTableScalarRange() to
  /// ensure that the lookuptable has correct ranges.
  void onDataUpdated();

  /// This slot gets called when the input to the representation is "accepted".
  /// We mark this representation's LUT ranges dirty so that when the pipeline
  /// finally updates, we can reset the LUT ranges.
  void onInputAccepted();
protected:
  /// Creates helper proxies such as as the proxy
  /// for volume opacity function.
  void createHelperProxies();
  
  /// Overridden to capture the input's modified signal.
  virtual void onInputChanged();

  /// Creates a default proxy for volume opacity function.
  vtkSMProxy* createOpacityFunctionProxy(
    vtkSMPropRepresentationProxy* repr);
 
  bool UpdateLUTRangesOnDataUpdate;

private:
  class pqInternal;
  pqInternal* Internal; 
  static void getColorArray(
    vtkPVDataSetAttributesInformation* attrInfo,
    vtkPVDataSetAttributesInformation* inAttrInfo,
    vtkPVArrayInformation*& arrayInfo);

  int getNumberOfComponents(const char* arrayname, int fieldType);

  /// Returns the settings key.
  static const char* UNSTRUCTURED_GRID_OUTLINE_THRESHOLD();
};

#endif
