//  SMESH SMESHGUI : GUI for SMESH component
//
//  Copyright (C) 2003  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
//  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS 
// 
//  This library is free software; you can redistribute it and/or 
//  modify it under the terms of the GNU Lesser General Public 
//  License as published by the Free Software Foundation; either 
//  version 2.1 of the License. 
// 
//  This library is distributed in the hope that it will be useful, 
//  but WITHOUT ANY WARRANTY; without even the implied warranty of 
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU 
//  Lesser General Public License for more details. 
// 
//  You should have received a copy of the GNU Lesser General Public 
//  License along with this library; if not, write to the Free Software 
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA 
// 
//  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org 
//
//
//
//  File   : SMESHGUI_ClippingDlg.cxx
//  Author : Nicolas REJNERI
//  Module : SMESH
//  $Header$

#include "SMESHGUI_ClippingDlg.h"

#include "SMESHGUI.h"
#include "SMESHGUI_Utils.h"
#include "SMESHGUI_VTKUtils.h"

#include <algorithm>

// QT Includes
#include <qlabel.h>
#include <qpushbutton.h>
#include <qcombobox.h>
#include <qcheckbox.h>
#include <qlayout.h>
#include <qgroupbox.h>

#include <vtkMath.h>
#include <vtkCamera.h>
#include <vtkRenderer.h>
#include <vtkImplicitBoolean.h>
#include <vtkImplicitFunctionCollection.h>
#include <vtkObjectFactory.h>

#include <vtkDataSet.h>
#include <vtkDataSetMapper.h>
#include <vtkPlaneSource.h>
#include <vtkPolyData.h>

#include "VTKViewer_ViewFrame.h"
#include "QAD_RightFrame.h"
#include "QAD_WaitCursor.h"
#include "SALOME_ListIteratorOfListIO.hxx"
#include "SMESH_Actor.h"
#include "SALOME_Selection.h"
#include "SALOME_InteractiveObject.hxx"
#include "SMESH_ActorUtils.h"

#include "VTKViewer_ViewFrame.h"
#include "VTKViewer_RenderWindow.h"

#include <vtkRenderer.h>

using namespace std;


class OrientedPlane: public vtkPlane
{
  QAD_Study* myStudy;
  QAD_StudyFrame* myStudyFrame;
  VTKViewer_ViewFrame* myViewFrame;
  
  vtkDataSetMapper* myMapper;


public:
  static OrientedPlane *New(){
    return new OrientedPlane();
  }
  static OrientedPlane *New(QAD_Study* theStudy){
    return new OrientedPlane(theStudy);
  }
  vtkTypeMacro(OrientedPlane, vtkPlane);
  
  
  SMESH::Orientation myOrientation;
  float myDistance;
  double myAngle[2];

  vtkPlaneSource* myPlaneSource;
  SALOME_Actor *myActor;
  
  void SetOrientation(SMESH::Orientation theOrientation) {myOrientation = theOrientation;}
  SMESH::Orientation GetOrientation() {return myOrientation;}

  void SetDistance(float theDistance) {myDistance = theDistance;}
  float GetDistance() {return myDistance;}

  void ShallowCopy(OrientedPlane* theOrientedPlane){
    SetNormal(theOrientedPlane->GetNormal());
    SetOrigin(theOrientedPlane->GetOrigin());

    myOrientation = theOrientedPlane->GetOrientation();
    myDistance = theOrientedPlane->GetDistance();

    myAngle[0] = theOrientedPlane->myAngle[0];
    myAngle[1] = theOrientedPlane->myAngle[1];

    myPlaneSource->SetNormal(theOrientedPlane->myPlaneSource->GetNormal());
    myPlaneSource->SetOrigin(theOrientedPlane->myPlaneSource->GetOrigin());
    myPlaneSource->SetPoint1(theOrientedPlane->myPlaneSource->GetPoint1());
    myPlaneSource->SetPoint2(theOrientedPlane->myPlaneSource->GetPoint2());
  }

protected:
  OrientedPlane(QAD_Study* theStudy):
    myOrientation(SMESH::XY),
    myDistance(0.5),
    myStudy(theStudy),
    myStudyFrame(theStudy->getActiveStudyFrame()),
    myViewFrame(SMESH::GetVtkViewFrame(theStudy->getActiveStudyFrame()))
  {
    Init();
    myViewFrame->AddActor( myActor );
  }

  OrientedPlane():
    myOrientation(SMESH::XY),
    myDistance(0.5),
    myStudy(NULL),
    myStudyFrame(NULL),
    myViewFrame(NULL)
  {
    Init();
  }

  void Init(){
    myPlaneSource = vtkPlaneSource::New();

    myAngle[0] = myAngle[1] = 0.0;

    // Create and display actor
    myMapper = vtkDataSetMapper::New();
    myMapper->SetInput( myPlaneSource->GetOutput() );
    
    myActor = SALOME_Actor::New();
    myActor->VisibilityOff();
    myActor->PickableOff();
    myActor->SetInfinitive(true);
    myActor->SetMapper( myMapper );

    vtkProperty* aProp = vtkProperty::New();
    float anRGB[3];
    anRGB[0] = SMESH::GetFloat("SMESH:SettingsFillColorRed", 0)/255.;
    anRGB[1] = SMESH::GetFloat("SMESH:SettingsFillColorGreen", 170)/255.;
    anRGB[2] = SMESH::GetFloat("SMESH:SettingsFillColorBlue", 255)/255.;
    aProp->SetColor(anRGB[0],anRGB[1],anRGB[2]);
    aProp->SetOpacity(0.75);
    myActor->SetProperty( aProp );
    aProp->Delete();
    
    vtkProperty* aBackProp = vtkProperty::New();
    anRGB[0] = SMESH::GetFloat("SMESH:SettingsBackFaceColorRed", 0)/255.;
    anRGB[1] = SMESH::GetFloat("SMESH:SettingsBackFaceColorGreen", 0)/255.;
    anRGB[2] = SMESH::GetFloat("SMESH:SettingsBackFaceColorBlue", 255)/255.;
    aBackProp->SetColor(anRGB[0],anRGB[1],anRGB[2]);
    aBackProp->SetOpacity(0.75);
    myActor->SetBackfaceProperty( aBackProp );
    aBackProp->Delete();
  }

  ~OrientedPlane(){
    if(myStudy && SMESH::FindVtkViewFrame(myStudy,myStudyFrame)){
      myViewFrame->RemoveActor(myActor);
    }
    myActor->Delete();
    
    myMapper->RemoveAllInputs();
    myMapper->Delete();
    
    myPlaneSource->UnRegisterAllOutputs();
    myPlaneSource->Delete();
  };
  
private:
  // Not implemented.
  OrientedPlane(const OrientedPlane&); 
  void operator=(const OrientedPlane&);

};

struct TSetVisiblity{
  TSetVisiblity(int theIsVisible): myIsVisible(theIsVisible){}
  void operator()(SMESH::TVTKPlane& theOrientedPlane){
    theOrientedPlane->myActor->SetVisibility(myIsVisible);
  }
  int myIsVisible;
};


//=================================================================================
// class    : SMESHGUI_ClippingDlg()
// purpose  : 
//
//=================================================================================
SMESHGUI_ClippingDlg::SMESHGUI_ClippingDlg( QWidget* parent,
					    const char* name,
					    bool modal,
					    WFlags fl )
  : QDialog( parent, name, modal, WStyle_Customize | WStyle_NormalBorder | WStyle_Title | WStyle_SysMenu | WDestructiveClose )
{
  if ( !name )
    setName( "SMESHGUI_ClippingDlg" );
  setCaption( tr( "SMESH_CLIPPING_TITLE"  ) );
  setSizeGripEnabled( TRUE );
  QGridLayout* SMESHGUI_ClippingDlgLayout = new QGridLayout( this ); 
  SMESHGUI_ClippingDlgLayout->setSpacing( 6 );
  SMESHGUI_ClippingDlgLayout->setMargin( 11 );

  // Controls for selecting, creating, deleting planes
  QGroupBox* GroupPlanes = new QGroupBox( this, "GroupPlanes" );
  GroupPlanes->setTitle( tr("Clipping planes") );
  GroupPlanes->setColumnLayout(0, Qt::Vertical);
  GroupPlanes->layout()->setSpacing( 0 );
  GroupPlanes->layout()->setMargin( 0 );
  QGridLayout* GroupPlanesLayout = new QGridLayout( GroupPlanes->layout() );
  GroupPlanesLayout->setAlignment( Qt::AlignTop );
  GroupPlanesLayout->setSpacing( 6 );
  GroupPlanesLayout->setMargin( 11 );
  
  ComboBoxPlanes = new QComboBox(GroupPlanes, "ComboBoxPlanes");
  GroupPlanesLayout->addWidget( ComboBoxPlanes, 0, 0 );
  
  QSpacerItem* spacerGP = new QSpacerItem( 20, 20, QSizePolicy::Expanding, QSizePolicy::Minimum );
  GroupPlanesLayout->addItem( spacerGP, 0, 1 );
  
  buttonNew = new QPushButton( GroupPlanes, "buttonNew" );
  buttonNew->setText( tr( "SMESH_BUT_NEW"  ) );
  GroupPlanesLayout->addWidget( buttonNew, 0, 2 );
  
  buttonDelete = new QPushButton( GroupPlanes, "buttonDelete" );
  buttonDelete->setText( tr( "SMESH_BUT_DELETE"  ) );
  GroupPlanesLayout->addWidget( buttonDelete, 0, 3 );

  // Controls for defining plane parameters
  QGroupBox* GroupParameters = new QGroupBox( this, "GroupParameters" );
  GroupParameters->setTitle( tr("SMESH_PARAMETERS") );
  GroupParameters->setColumnLayout(0, Qt::Vertical);
  GroupParameters->layout()->setSpacing( 0 );
  GroupParameters->layout()->setMargin( 0 );
  QGridLayout* GroupParametersLayout = new QGridLayout( GroupParameters->layout() );
  GroupParametersLayout->setAlignment( Qt::AlignTop );
  GroupParametersLayout->setSpacing( 6 );
  GroupParametersLayout->setMargin( 11 );
  
  TextLabelOrientation = new QLabel( GroupParameters, "TextLabelOrientation" );
  TextLabelOrientation->setText( tr("SMESH_ORIENTATION") );
  GroupParametersLayout->addWidget( TextLabelOrientation, 0, 0 );
  
  ComboBoxOrientation = new QComboBox(GroupParameters, "ComboBoxOrientation");
  GroupParametersLayout->addWidget( ComboBoxOrientation, 0, 1 );
  
  TextLabelDistance = new QLabel( GroupParameters, "TextLabelDistance" );
  TextLabelDistance->setText( tr("SMESH_DISTANCE") );
  GroupParametersLayout->addWidget( TextLabelDistance, 1, 0 );

  SpinBoxDistance = new SMESHGUI_SpinBox( GroupParameters, "SpinBoxDistance" );
  GroupParametersLayout->addWidget( SpinBoxDistance, 1, 1 );

  TextLabelRot1 = new QLabel( GroupParameters, "TextLabelRot1" );
  TextLabelRot1->setText( tr("Rotation around X (Y to Z):") );
  GroupParametersLayout->addWidget( TextLabelRot1, 2, 0 );

  SpinBoxRot1 = new SMESHGUI_SpinBox( GroupParameters, "SpinBoxRot1" );
  GroupParametersLayout->addWidget( SpinBoxRot1, 2, 1 );
 
  TextLabelRot2 = new QLabel( GroupParameters, "TextLabelRot2" );
  TextLabelRot2->setText( tr("Rotation around Y (X to Z):") );
  GroupParametersLayout->addWidget( TextLabelRot2, 3, 0 );
  
  SpinBoxRot2 = new SMESHGUI_SpinBox( GroupParameters, "SpinBoxRot2" );
  GroupParametersLayout->addWidget( SpinBoxRot2, 3, 1 );

  PreviewCheckBox = new QCheckBox(tr("Show preview"), GroupParameters);
  PreviewCheckBox->setChecked(true);
  GroupParametersLayout->addWidget( PreviewCheckBox, 4, 0 );

  AutoApplyCheckBox = new QCheckBox(tr("Auto Apply"), GroupParameters);
  AutoApplyCheckBox->setChecked(false);
  GroupParametersLayout->addWidget( AutoApplyCheckBox, 4, 1 );
   
  // Controls for "Ok", "Apply" and "Close" button
  QGroupBox* GroupButtons = new QGroupBox( this, "GroupButtons" );
  GroupButtons->setSizePolicy( QSizePolicy( (QSizePolicy::SizeType)7, (QSizePolicy::SizeType)0, 0, 0, GroupButtons->sizePolicy().hasHeightForWidth() ) );
  GroupButtons->setGeometry( QRect( 10, 10, 281, 48 ) ); 
  GroupButtons->setTitle( tr( ""  ) );
  GroupButtons->setColumnLayout(0, Qt::Vertical );
  GroupButtons->layout()->setSpacing( 0 );
  GroupButtons->layout()->setMargin( 0 );
  QGridLayout* GroupButtonsLayout = new QGridLayout( GroupButtons->layout() );
  GroupButtonsLayout->setAlignment( Qt::AlignTop );
  GroupButtonsLayout->setSpacing( 6 );
  GroupButtonsLayout->setMargin( 11 );
  buttonCancel = new QPushButton( GroupButtons, "buttonCancel" );
  buttonCancel->setText( tr( "SMESH_BUT_CLOSE"  ) );
  buttonCancel->setAutoDefault( TRUE );
  GroupButtonsLayout->addWidget( buttonCancel, 0, 3 );
  buttonApply = new QPushButton( GroupButtons, "buttonApply" );
  buttonApply->setText( tr( "SMESH_BUT_APPLY"  ) );
  buttonApply->setAutoDefault( TRUE );
  GroupButtonsLayout->addWidget( buttonApply, 0, 1 );
  QSpacerItem* spacer_9 = new QSpacerItem( 20, 20, QSizePolicy::Expanding, QSizePolicy::Minimum );
  GroupButtonsLayout->addItem( spacer_9, 0, 2 );
  buttonOk = new QPushButton( GroupButtons, "buttonOk" );
  buttonOk->setText( tr( "SMESH_BUT_OK"  ) );
  buttonOk->setAutoDefault( TRUE );
  buttonOk->setDefault( TRUE );
  GroupButtonsLayout->addWidget( buttonOk, 0, 0 );

  SMESHGUI_ClippingDlgLayout->addWidget( GroupPlanes,      0, 0 );
  SMESHGUI_ClippingDlgLayout->addWidget( GroupParameters,  1, 0 );
  SMESHGUI_ClippingDlgLayout->addWidget( GroupButtons,     2, 0 );
  
  mySelection = SALOME_Selection::Selection( SMESHGUI::GetSMESHGUI()->GetActiveStudy()->getSelection());

  // Initial state
  SpinBoxDistance->RangeStepAndValidator( 0.0, 1.0, 0.01, 3 );
  SpinBoxRot1->RangeStepAndValidator( -180.0, 180.0, 1, 3 );
  SpinBoxRot2->RangeStepAndValidator( -180.0, 180.0, 1, 3 );

  ComboBoxOrientation->insertItem( tr("|| X-Y") );
  ComboBoxOrientation->insertItem( tr("|| Y-Z") );
  ComboBoxOrientation->insertItem( tr("|| Z-X") );

  SpinBoxDistance->SetValue(0.5);

  myActor = 0;
  myIsSelectPlane = false;
  onSelectionChanged();
  
  // signals and slots connections :
  connect( ComboBoxPlanes, SIGNAL( activated( int )), this, SLOT( onSelectPlane( int ) ) );
  connect( buttonNew, SIGNAL( clicked() ), this, SLOT( ClickOnNew() ) );
  connect( buttonDelete, SIGNAL( clicked() ), this, SLOT( ClickOnDelete() ) );
  connect( ComboBoxOrientation, SIGNAL( activated( int )), this, SLOT( onSelectOrientation( int ) ) );
  connect( SpinBoxDistance, SIGNAL( valueChanged( double )), this, SLOT( SetCurrentPlaneParam() ) );
  connect( SpinBoxRot1, SIGNAL( valueChanged( double )), this, SLOT( SetCurrentPlaneParam() ) );
  connect( SpinBoxRot2, SIGNAL( valueChanged( double )), this, SLOT( SetCurrentPlaneParam() ) );
  connect( PreviewCheckBox, SIGNAL( toggled( bool )), this, SLOT( OnPreviewToggle( bool ) ) );
  connect( AutoApplyCheckBox, SIGNAL( toggled( bool )), this, SLOT( ClickOnApply() ) );
  connect( buttonOk, SIGNAL( clicked() ), this, SLOT( ClickOnOk() ) );
  connect( buttonCancel, SIGNAL( clicked() ), this, SLOT( ClickOnCancel() ) ) ;
  connect( buttonApply, SIGNAL( clicked() ), this, SLOT(ClickOnApply() ) );
  connect( SMESHGUI::GetSMESHGUI(), SIGNAL ( SignalCloseAllDialogs() ), this, SLOT( ClickOnOk() ) ) ;
  connect( mySelection,  SIGNAL( currentSelectionChanged() ), this, SLOT( onSelectionChanged() ) );
  /* to close dialog if study frame change */
  connect( SMESHGUI::GetSMESHGUI(), SIGNAL ( SignalStudyFrameChanged() ),  this, SLOT( ClickOnCancel() ) ) ;
  
  /* Move widget on the botton right corner of main widget */
  int x, y ;
  SMESHGUI::GetSMESHGUI()->DefineDlgPosition( this, x, y ) ;
  this->move( x, y ) ;
  this->show();
}


//=================================================================================
// function : ~SMESHGUI_ClippingDlg()
// purpose  :
//=================================================================================
SMESHGUI_ClippingDlg::~SMESHGUI_ClippingDlg()
{
  // no need to delete child widgets, Qt does it all for us
  std::for_each(myPlanes.begin(),myPlanes.end(),TSetVisiblity(false));
  SMESH::RenderViewFrame(SMESH::GetCurrentVtkView());
}


void SMESHGUI_ClippingDlg::ClickOnApply()
{
  if (!myActor)
    return;

  if ( SMESHGUI::GetSMESHGUI()->GetActiveStudy()->getActiveStudyFrame()->getTypeView() == VIEW_VTK ) {
    QAD_WaitCursor wc;
    
    myActor->RemoveAllClippingPlanes();

    SMESH::TPlanes::iterator anIter = myPlanes.begin();
    for (;anIter != myPlanes.end();anIter++){
      OrientedPlane* anOrientedPlane = OrientedPlane::New();
      anOrientedPlane->ShallowCopy(anIter->GetPointer());
      myActor->AddClippingPlane(anOrientedPlane);
      anOrientedPlane->Delete();
    }

    SMESH::RenderViewFrame(SMESH::GetCurrentVtkView());
  }
}


//=======================================================================
// function : ClickOnOk()
// purpose  :
//=======================================================================
void SMESHGUI_ClippingDlg::ClickOnOk()
{
  ClickOnApply() ;
  ClickOnCancel() ;
}


//=======================================================================
// function : ClickOnCancel()
// purpose  :
//=======================================================================
void SMESHGUI_ClippingDlg::ClickOnCancel()
{
  close();
}


//=================================================================================
// function : onSelectionChanged()
// purpose  : Called when selection is changed
//=================================================================================
void SMESHGUI_ClippingDlg::onSelectionChanged()
{
  if ( SMESHGUI::GetSMESHGUI()->GetActiveStudy()->getActiveStudyFrame()->getTypeView() == VIEW_VTK ) {
    if ( mySelection->IObjectCount() ) {
      Handle(SALOME_InteractiveObject) IOS = mySelection->firstIObject();
      myActor = SMESH::FindActorByEntry(IOS->getEntry());
      if ( myActor ){
	std::for_each(myPlanes.begin(),myPlanes.end(),TSetVisiblity(false));
	myPlanes.clear();

	vtkIdType anId = 0, anEnd = myActor->GetNumberOfClippingPlanes();
	for(; anId < anEnd; anId++){
	  if(vtkImplicitFunction* aFunction = myActor->GetClippingPlane(anId)){
	    if(OrientedPlane* aPlane = OrientedPlane::SafeDownCast(aFunction)){
	      OrientedPlane* anOrientedPlane = OrientedPlane::New(SMESH::GetActiveStudy());
	      SMESH::TVTKPlane aTVTKPlane(anOrientedPlane);
	      anOrientedPlane->Delete();
	      aTVTKPlane->ShallowCopy(aPlane);
	      myPlanes.push_back(aTVTKPlane);
	    }
	  }
	}

	std::for_each(myPlanes.begin(),myPlanes.end(),
		      TSetVisiblity(PreviewCheckBox->isChecked()));
      }
    }
  }
  Sinchronize();
  SMESH::RenderViewFrame(SMESH::GetCurrentVtkView());
}


//=======================================================================
// function : onSelectPlane()
// purpose  :
//=======================================================================
void SMESHGUI_ClippingDlg::onSelectPlane(int theIndex)
{  
  if (!myActor || myPlanes.empty())
    return;
  
  OrientedPlane* aPlane = myPlanes[theIndex].GetPointer();
  
  // Orientation
  SMESH::Orientation anOrientation = aPlane->GetOrientation();
  
  // Rotations
  double aRot[2] = {aPlane->myAngle[0], aPlane->myAngle[1]};

  // Set plane parameters in the dialog
  myIsSelectPlane = true;
  setDistance(aPlane->GetDistance());
  setRotation(aRot[0], aRot[1]);
  switch (anOrientation) {
  case SMESH::XY: 
    ComboBoxOrientation->setCurrentItem(0);
    onSelectOrientation(0);
    break;
  case SMESH::YZ: 
    ComboBoxOrientation->setCurrentItem(1);
    onSelectOrientation(1);
    break;
  case SMESH::ZX: 
    ComboBoxOrientation->setCurrentItem(2);
    onSelectOrientation(2);
    break;
  }
  myIsSelectPlane = false;
}


//=======================================================================
// function : ClickOnNew()
// purpose  :
//=======================================================================
void SMESHGUI_ClippingDlg::ClickOnNew()
{
  if (!myActor)
    return;
  
  OrientedPlane* aPlane = OrientedPlane::New(SMESH::GetActiveStudy());
  SMESH::TVTKPlane aTVTKPlane(aPlane);
  myPlanes.push_back(aTVTKPlane);

  if(PreviewCheckBox->isChecked())
    aTVTKPlane->myActor->VisibilityOn();

  Sinchronize();
  SetCurrentPlaneParam();
}


//=======================================================================
// function : ClickOnDelete()
// purpose  :
//=======================================================================
void SMESHGUI_ClippingDlg::ClickOnDelete()
{
  if (!myActor || myPlanes.empty())
    return;
  
  int aPlaneIndex = ComboBoxPlanes->currentItem();
  
  SMESH::TPlanes::iterator anIter = myPlanes.begin() + aPlaneIndex;
  anIter->GetPointer()->myActor->SetVisibility(false);
  myPlanes.erase(anIter);
  
  if(AutoApplyCheckBox->isChecked())
    ClickOnApply();

  Sinchronize();
  SMESH::RenderViewFrame(SMESH::GetCurrentVtkView());
}


//=======================================================================
// function : onSelectOrientation()
// purpose  :
//=======================================================================
void SMESHGUI_ClippingDlg::onSelectOrientation(int theItem)
{
  if (myPlanes.empty())
    return;
  
  if      (theItem == 0) {
    TextLabelRot1->setText( tr( "Rotation around X (Y to Z):") );
    TextLabelRot2->setText( tr( "Rotation around Y (X to Z):" ) );
  }
  else if (theItem == 1) {
    TextLabelRot1->setText( tr( "Rotation around Y (Z to X):" ) );
    TextLabelRot2->setText( tr( "Rotation around Z (Y to X):" ) );
  }
  else if (theItem == 2) {
    TextLabelRot1->setText( tr( "Rotation around Z (X to Y):" ) );
    TextLabelRot2->setText( tr( "Rotation around X (Z to Y):" ) );
  }
  
  if((QComboBox*)sender() == ComboBoxOrientation)
    SetCurrentPlaneParam();
}


//=======================================================================
// function : Sinchronize()
// purpose  :
//=======================================================================
void SMESHGUI_ClippingDlg::Sinchronize()
{
  int aNbPlanes = myPlanes.size();
  ComboBoxPlanes->clear();
  
  QString aName;
  for(int i = 1; i<=aNbPlanes ; i++){
    aName = QString(tr("Plane# %1")).arg(i);
    ComboBoxPlanes->insertItem(aName);
  }
  
  int aPos = ComboBoxPlanes->count() - 1;
  ComboBoxPlanes->setCurrentItem(aPos);
  
  bool anIsControlsEnable = (aPos >= 0);
  if(anIsControlsEnable){
    onSelectPlane(aPos);
  }else{
    ComboBoxPlanes->insertItem( tr("No planes") );
    SpinBoxRot1->SetValue(0.0);
    SpinBoxRot2->SetValue(0.0);
    SpinBoxDistance->SetValue(0.5);
  }

  buttonDelete->setEnabled(anIsControlsEnable);
  buttonApply->setEnabled(anIsControlsEnable);
  PreviewCheckBox->setEnabled(anIsControlsEnable);
  AutoApplyCheckBox->setEnabled(anIsControlsEnable);
  ComboBoxOrientation->setEnabled(anIsControlsEnable);
  SpinBoxDistance->setEnabled(anIsControlsEnable);
  SpinBoxRot1->setEnabled(anIsControlsEnable);
  SpinBoxRot2->setEnabled(anIsControlsEnable);
}


//=======================================================================
// function : setRotation()
// purpose  :
//=======================================================================
void SMESHGUI_ClippingDlg::setRotation( const double theRot1, const double theRot2 )
{
  SpinBoxRot1->SetValue(theRot1);
  SpinBoxRot2->SetValue(theRot2);
}


//=======================================================================
// function : SetCurrentPlaneParam
// purpose  :
//=======================================================================
void
SMESHGUI_ClippingDlg::
SetCurrentPlaneParam()
{
  if(myPlanes.empty() || myIsSelectPlane)
    return;
  
  int aCurPlaneIndex = ComboBoxPlanes->currentItem();
  
  OrientedPlane* aPlane = myPlanes[aCurPlaneIndex].GetPointer();
  
  float aNormal[3];
  SMESH::Orientation anOrientation;
  float aDir[3][3] = {{0, 0, 0}, {0, 0, 0}};
  {  
    static double aCoeff = vtkMath::Pi()/180.0;

    float aRot[2] = {getRotation1(), getRotation2()};
    aPlane->myAngle[0] = aRot[0];
    aPlane->myAngle[1] = aRot[1];

    float anU[2] = {cos(aCoeff*aRot[0]), cos(aCoeff*aRot[1])};
    float aV[2] = {sqrt(1.0-anU[0]*anU[0]), sqrt(1.0-anU[1]*anU[1])};
    aV[0] = aRot[0] > 0? aV[0]: -aV[0];
    aV[1] = aRot[1] > 0? aV[1]: -aV[1];
		    
    switch (ComboBoxOrientation->currentItem()) {
    case 0: 
      anOrientation = SMESH::XY; 

      aDir[0][1] = anU[0];
      aDir[0][2] = aV[0];

      aDir[1][0] = anU[1];
      aDir[1][2] = aV[1];

      break;
    case 1: 
      anOrientation = SMESH::YZ; 

      aDir[0][2] = anU[0];
      aDir[0][0] = aV[0];

      aDir[1][1] = anU[1];
      aDir[1][0] = aV[1];

      break;
    case 2: 
      anOrientation = SMESH::ZX; 

      aDir[0][0] = anU[0];
      aDir[0][1] = aV[0];

      aDir[1][2] = anU[1];
      aDir[1][1] = aV[1];

      break;
    }

    vtkMath::Cross(aDir[1],aDir[0],aNormal);
    vtkMath::Normalize(aNormal);
    vtkMath::Cross(aNormal,aDir[1],aDir[0]);
  }
  
  aPlane->SetOrientation(anOrientation);
  aPlane->SetDistance(getDistance());
  
  myActor->SetPlaneParam(aNormal, getDistance(), aPlane);

  vtkDataSet* aDataSet = myActor->GetInput();
  float *aPnt = aDataSet->GetCenter();

  float* anOrigin = aPlane->GetOrigin();
  float aDel = aDataSet->GetLength()/2.0;

  float aDelta[2][3] = {{aDir[0][0]*aDel, aDir[0][1]*aDel, aDir[0][2]*aDel},
			{aDir[1][0]*aDel, aDir[1][1]*aDel, aDir[1][2]*aDel}};
  float aParam, aPnt0[3], aPnt1[3], aPnt2[3];

  float aPnt01[3] = {aPnt[0] - aDelta[0][0] - aDelta[1][0], 
		     aPnt[1] - aDelta[0][1] - aDelta[1][1], 
		     aPnt[2] - aDelta[0][2] - aDelta[1][2]};
  float aPnt02[3] = {aPnt01[0] + aNormal[0], 
		      aPnt01[1] + aNormal[1], 
		      aPnt01[2] + aNormal[2]};
  vtkPlane::IntersectWithLine(aPnt01,aPnt02,aNormal,anOrigin,aParam,aPnt0);

  float aPnt11[3] = {aPnt[0] - aDelta[0][0] + aDelta[1][0], 
		     aPnt[1] - aDelta[0][1] + aDelta[1][1], 
		     aPnt[2] - aDelta[0][2] + aDelta[1][2]};
  float aPnt12[3] = {aPnt11[0] + aNormal[0], 
		     aPnt11[1] + aNormal[1], 
		     aPnt11[2] + aNormal[2]};
  vtkPlane::IntersectWithLine(aPnt11,aPnt12,aNormal,anOrigin,aParam,aPnt1);
  
  float aPnt21[3] = {aPnt[0] + aDelta[0][0] - aDelta[1][0], 
		     aPnt[1] + aDelta[0][1] - aDelta[1][1], 
		     aPnt[2] + aDelta[0][2] - aDelta[1][2]};
  float aPnt22[3] = {aPnt21[0] + aNormal[0], 
		     aPnt21[1] + aNormal[1], 
		     aPnt21[2] + aNormal[2]};
  vtkPlane::IntersectWithLine(aPnt21,aPnt22,aNormal,anOrigin,aParam,aPnt2);
  
  vtkPlaneSource* aPlaneSource = aPlane->myPlaneSource;
  aPlaneSource->SetNormal(aNormal[0],aNormal[1],aNormal[2]);
  aPlaneSource->SetOrigin(aPnt0[0],aPnt0[1],aPnt0[2]);
  aPlaneSource->SetPoint1(aPnt1[0],aPnt1[1],aPnt1[2]);
  aPlaneSource->SetPoint2(aPnt2[0],aPnt2[1],aPnt2[2]);
  
  if(AutoApplyCheckBox->isChecked())
    ClickOnApply();
  
  SMESH::RenderViewFrame(SMESH::GetCurrentVtkView());
}


void SMESHGUI_ClippingDlg::OnPreviewToggle(bool theIsToggled){
  std::for_each(myPlanes.begin(),myPlanes.end(),TSetVisiblity(theIsToggled));
  SMESH::RenderViewFrame(SMESH::GetCurrentVtkView());
}