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   Program: ParaView
   Module:    $RCSfile: pqCustomFilterDefinitionWizard.h,v $

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

   ParaView is a free software; you can redistribute it and/or modify it
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/// \file pqCustomFilterDefinitionWizard.h
/// \date 6/19/2006

#ifndef _pqCustomFilterDefinitionWizard_h
#define _pqCustomFilterDefinitionWizard_h


#include "pqComponentsExport.h"
#include <QDialog>

class pqCustomFilterDefinitionModel;
class pqCustomFilterDefinitionWizardForm;
class pqCustomFilterManagerModel;
class pqOutputPort;
class QModelIndex;
class vtkSMCompoundSourceProxy;

/*! \class pqCustomFilterDefinitionWizard
 *  \brief
 *    The pqCustomFilterDefinitionWizard class is used to create a
 *    compound proxy definition one step at a time.
 * 
 *  The wizard should be created with a pqCustomFilterDefinitionModel.
 *  The model stores the sources that will be placed in the custom
 *  filter. The model is also used when selecting the exposed
 *  properties.
 * 
 *  The following is an example of how to use the wizard:
 * 
 *  \code
 *  pqCustomFilterDefinitionModel filter(this);
 *  filter.setContents(
 *    pqApplicationCore::instance()->getSelectionModel()->selectedItems());
 *  pqCustomFilterDefinitionWizard wizard(&filter, this);
 *  if(wizard.exec() == QDialog::Accepted)
 *    {
 *    wizard.createCustomFilter();
 *    }
 *  \endcode
 *
 *  The custom filter definition model is filled out using the
 *  selected pipeline sources. After setting the custom filter
 *  definition model's contents, you can check to see if any sources
 *  were added. The wizard can make a compound proxy without any
 *  sources, but you may not want to allow it. After the
 *  \c createCustomFilter call, you can get the name of the newly
 *  created compound proxy.
 */
class PQCOMPONENTS_EXPORT pqCustomFilterDefinitionWizard : public QDialog
{
  Q_OBJECT

public:
  /// \brief
  ///   Creates a custom filter definition wizard.
  /// \param model The custom filter definition model to use. The
  ///   model should not be null.
  /// \param parent The parent widget for the wizard.
  pqCustomFilterDefinitionWizard(pqCustomFilterDefinitionModel *model,
      QWidget *parent=0);
  virtual ~pqCustomFilterDefinitionWizard();

  /// \brief
  ///   Gets the custom filter definition model used by the wizard.
  /// \return
  ///   A pointer to the custom filter definition model.
  pqCustomFilterDefinitionModel *getModel() const {return this->Model;}

  /// \brief
  ///   Gets the name of the compound proxy created by the wizard.
  /// \return
  ///   The name of the new compound proxy definition. The name will
  ///   be empty if the compound proxy has not been created.
  /// \sa pqCustomFilterDefinitionWizard::createCustomFilter();
  QString getCustomFilterName() const;

public slots:
  /// \brief
  ///   Creates a compound proxy definition.
  ///
  /// The compound proxy definition is created using the custom filter
  /// definition model and the parameters entered by the user. The
  /// new definition is registered with the server manager.
  ///
  /// \sa pqCustomFilterDefinitionWizard::getCustomFilterName()
  void createCustomFilter();

private:
  /// \brief
  ///   Adds proxies referred to by the proxies in the custom filter that
  ///   the user could not have explicitly selected/deselected.
  /// 
  /// A custom filter may includes proxies which refer to other internal 
  /// proxies such as implicit functions, internal sources which are not shown
  /// in the pipeline browser. We include these proxies into the custom filter
  /// so that its definition is complete. This method is called after all proxies
  /// have been added to the custom filter and before its definition is 
  /// created.
  void addAutoIncludedProxies();

  /// \brief
  ///   Validates the custom filter name field.
  ///
  /// This method will pop up message boxes for the user if there is
  /// something wrong with the name entered.
  ///
  /// \return
  ///   True if the custom filter name is valid.
  bool validateCustomFilterName();

  /// \brief
  ///   Adds the default input and output to the forms.
  ///
  /// The current implementation only works for straight pipelines
  /// with one input and no branches.
  void setupDefaultInputOutput();

private slots:
  /// \name Page Navigation
  //@{
  /// Called when the user clicks the back button.
  void navigateBack();

  /// Called when the user clicks the next button.
  void navigateNext();

  /// Called when the user clicks the finish button.
  void finishWizard();

  /// \brief
  ///   Clears the custom filter overwite flag.
  /// \param text The changed name text.
  void clearNameOverwrite(const QString &text);
  //@}

  /// \name Model Selection Updates
  //@{
  /// \brief
  ///   Updates the input form fields for the newly selected source.
  ///
  /// The input property combobox is updated to display the available
  /// inputs for the newly selected source.
  ///
  /// \param current The currently selected index.
  /// \param previous The previously selected index.
  void updateInputForm(const QModelIndex &current,
      const QModelIndex &previous);

  /// \brief
  ///   Updates the output form fields for the newly selected source.
  /// \param current The currently selected index.
  /// \param previous The previously selected index.
  void updateOutputForm(const QModelIndex &current,
      const QModelIndex &previous);

  /// \brief
  ///   Updates the property form fields for the newly selected source.
  ///
  /// The property combobox is updated to display the available
  /// properties for the newly selected source. The input properties
  /// are excluded since they are set on the input page.
  ///
  /// \param current The currently selected index.
  /// \param previous The previously selected index.
  void updatePropertyForm(const QModelIndex &current,
      const QModelIndex &previous);
  //@}

  /// \name Input List Buttons
  //@{
  /// Adds an input to the list based on the form parameters.
  void addInput();

  /// Removes the selected input from the list.
  void removeInput();

  /// Moves the selected input up in the list.
  void moveInputUp();

  /// Moves the selected input down in the list.
  void moveInputDown();
  //@}

  /// \name Output List Buttons
  //@{
  /// Adds an output to the list based on the form parameters.
  void addOutput();

  /// Removes the selected output from the list.
  void removeOutput();

  /// Moves the selected output up in the list.
  void moveOutputUp();

  /// Moves the selected output down in the list.
  void moveOutputDown();
  //@}

  /// \name Property List Buttons
  //@{
  /// Adds an property to the list based on the form parameters.
  void addProperty();

  /// Removes the selected property from the list.
  void removeProperty();

  /// Moves the selected property up in the list.
  void movePropertyUp();

  /// Moves the selected property down in the list.
  void movePropertyDown();
  //@}

  /// \name List Selection Updates
  //@{
  /// \brief
  ///   Updates the input list buttons for the newly selected index.
  /// \param current The currently selected index.
  /// \param previous The previously selected index.
  void updateInputButtons(const QModelIndex &current,
      const QModelIndex &previous);

  /// \brief
  ///   Updates the output list buttons for the newly selected index.
  /// \param current The currently selected index.
  /// \param previous The previously selected index.
  void updateOutputButtons(const QModelIndex &current,
      const QModelIndex &previous);

  /// \brief
  ///   Updates the property list buttons for the newly selected index.
  /// \param current The currently selected index.
  /// \param previous The previously selected index.
  void updatePropertyButtons(const QModelIndex &current,
      const QModelIndex &previous);
  //@}

private:
  int CurrentPage;                          ///< Stores the current page.
  bool OverwriteOK;                         ///< Used with name validation.
  vtkSMCompoundSourceProxy *Filter;         ///< Stores the custom filter.
  pqCustomFilterDefinitionModel *Model;     ///< Stores the source hierarchy.
  pqCustomFilterDefinitionWizardForm *Form; ///< Defines the gui layout.

  /// Internal method called by addOutput().
  void addOutputInternal(pqOutputPort* port, const QString& string);
};

#endif
