paraview-dev 4.0.1-1ubuntu1 / usr / include / paraview / pqDataRepresentation.h

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

   Program: ParaView
   Module:    pqDataRepresentation.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
   Kitware Inc.
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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=========================================================================*/
#ifndef __pqDataRepresentation_h
#define __pqDataRepresentation_h

#include "pqRepresentation.h"

class pqDataRepresentationInternal;
class pqOutputPort;
class pqPipelineSource;
class pqScalarOpacityFunction;
class pqScalarsToColors;
class vtkPVArrayInformation;
class vtkPVDataInformation;
class vtkPVProminentValuesInformation;
class vtkPVTemporalDataInformation;

/// pqDataRepresentation is the superclass for a display for a pqPipelineSource
/// i.e. the input for this display proxy is a pqPiplineSource.
/// This class manages the linking between the pqPiplineSource
/// and pqDataRepresentation.
class PQCORE_EXPORT pqDataRepresentation : public pqRepresentation
{
  Q_OBJECT
  typedef pqRepresentation Superclass;
public:
  pqDataRepresentation(const QString& group, const QString& name,
    vtkSMProxy* display, pqServer* server,
    QObject* parent=0);
  virtual ~pqDataRepresentation();

  /// Get the source/filter of which this is a display.
  pqPipelineSource* getInput() const;

  /// Returns the input pqPipelineSource's output port to which this
  /// representation is connected.
  pqOutputPort* getOutputPortFromInput() const;

  /// Returns the data information for the data coming into the representation
  /// as input. 
  vtkPVDataInformation* getInputDataInformation() const;

  /// Returns the temporal data information for the input. This can be a very
  /// slow process. Use with extreme caution!!!
  vtkPVTemporalDataInformation* getInputTemporalDataInformation() const;

  /// Returns the represented data information. Depending on the representation
  /// this may differ from the input data information eg. if the representation
  /// shows an outline of the data, the this method will return the information
  /// about the polydata forming the outline not the input dataset.
  vtkPVDataInformation* getRepresentedDataInformation(bool update=true) const;

  /// Get the data bounds for the input of this display.
  /// Returns if the operation was successful.
  bool getDataBounds(double bounds[6]);

  /// Returns the lookuptable proxy, if any.
  /// Most consumer displays take a lookup table. This method
  /// provides access to the Lookup table, if one exists.
  virtual vtkSMProxy* getLookupTableProxy();

  /// Returns the pqScalarsToColors object for the lookup table
  /// proxy if any.
  /// Most consumer displays take a lookup table. This method
  /// provides access to the Lookup table, if one exists.
  virtual pqScalarsToColors* getLookupTable();

  /// Returns the proxy for the piecewise function used to
  /// map scalars to opacity.
  virtual vtkSMProxy* getScalarOpacityFunctionProxy() {return 0;}

  /// Returns the pqScalarOpacityFunction object for the piecewise
  /// function used to map scalars to opacity.
  virtual pqScalarOpacityFunction* getScalarOpacityFunction() {return 0;}

  /// Sets default values for the underlying proxy.
  /// This is during the initialization stage of the pqProxy
  /// for proxies created by the GUI itself i.e.
  /// for proxies loaded through state or created by python client
  /// this method won't be called.
  /// The default implementation iterates over all properties
  /// of the proxy and sets them to default values.
  virtual void setDefaultPropertyValues();

  /// Returns the data size for the full-res data.
  /// This may trigger a pipeline update to obtain correct data sizes.
  unsigned long getFullResMemorySize();

  /// This is convienience method to return first representation for the
  /// upstream stream filter/source in the same view as this representation.
  /// This is only applicable, if this representation is connected to a
  /// data-filter which has a valid input.
  pqDataRepresentation* getRepresentationForUpstreamSource() const;

  /// Convenience method to return the name of the active scalar array.
  virtual QString getProxyColorArrayName();
  /// Convenience method to return the active scalar array field association.
  virtual int getProxyScalarMode();
  /// Convenience method to return the array information associated with the active scalars.
  virtual vtkPVArrayInformation* getProxyColorArrayInfo();
  /// Convenience method to return prominent value list associated with the active scalars.
  virtual vtkPVProminentValuesInformation* getProxyColorProminentValuesInfo(
    double uncertainty = 1e-6, double minFrequency = 5e-4);

  virtual int getNumberOfComponents(const char* arrayname, int fieldType);
  virtual QString getComponentName( const char* arrayname, int fieldtype, int component);

signals:
  /// Fired when the representation proxy fires the vtkCommand::UpdateDataEvent.
  void dataUpdated();

protected slots:
  /// called when input property on display changes. We must detect if
  /// (and when) the display is connected to a new proxy.
  virtual void onInputChanged();

protected:
  /// Use this method to initialize the pqObject state using the
  /// underlying vtkSMProxy. This needs to be done only once,
  /// after the object has been created.
  virtual void initialize()
    {
    this->Superclass::initialize();
    this->onInputChanged();
    }

  virtual vtkPVArrayInformation* getArrayInformation( const char* arrayname, const int &fieldType );
  virtual vtkPVProminentValuesInformation* getProminentValuesInformation(
    const char* arrayname, const int &fieldType, double uncertainty, double minFrequency );

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

  pqDataRepresentationInternal* Internal;
};

#endif