//  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_NodesDlg.cxx
//  Author : Nicolas REJNERI
//  Module : SMESH
//  $Header$

#include "SMESHGUI_NodesDlg.h"

#include "SMESHGUI.h"
#include "SMESHGUI_Utils.h"
#include "SMESHGUI_MeshUtils.h"

#include "SMESHGUI_VTKUtils.h"
#include "SMESH_ActorUtils.h"

#include "VTKViewer_ViewFrame.h"
#include "SALOME_Actor.h"

#include "SMESHGUI_SpinBox.h"

#include "QAD_Application.h"
#include "QAD_Desktop.h"
#include "QAD_WaitCursor.h"
#include "QAD_MessageBox.h"

#include "SMESH_Actor.h"
#include "SMDS_Mesh.hxx"
#include "SMDS_MeshNode.hxx"

// VTK Includes
#include <vtkCell.h>
#include <vtkIdList.h>
#include <vtkIntArray.h>
#include <vtkCellArray.h>
#include <vtkUnsignedCharArray.h>
#include <vtkUnstructuredGrid.h>
#include <vtkDataSetMapper.h>
#include <vtkActorCollection.h>
#include <vtkRenderer.h>

// QT Includes
#include <qbuttongroup.h>
#include <qframe.h>
#include <qgroupbox.h>
#include <qlabel.h>
#include <qlineedit.h>
#include <qpushbutton.h>
#include <qradiobutton.h>
#include <qlayout.h>
#include <qvariant.h>
#include <qtooltip.h>
#include <qwhatsthis.h>
#include <qimage.h>
#include <qpixmap.h>
#include <qvalidator.h>
#include <qevent.h>

#include "utilities.h"

using namespace std;


namespace SMESH{

  void AddNode(SMESH::SMESH_Mesh_ptr theMesh, float x, float y, float z){
    QAD_WaitCursor wc;
    try{
      SALOMEDS::SObject_var aSobj = SMESH::FindSObject(theMesh);
      CORBA::String_var anEntry = aSobj->GetID();
      SMESH::SMESH_MeshEditor_var aMeshEditor = theMesh->GetMeshEditor();
      aMeshEditor->AddNode(x,y,z);
      SALOMEDS::Study_var aStudy = GetActiveStudyDocument();
      CORBA::Long anId = aStudy->StudyId();
      if(TVisualObjPtr aVisualObj = SMESH::GetVisualObj(anId,anEntry.in())){
	aVisualObj->Update(true);
      }
    }catch(SALOME::SALOME_Exception& exc) {
      INFOS("Follow exception was cought:\n\t"<<exc.details.text);
    }catch(const std::exception& exc){
      INFOS("Follow exception was cought:\n\t"<<exc.what());
    }catch(...){
      INFOS("Unknown exception was cought !!!");
    }
  }


  class TNodeSimulation{
    QAD_Study* myStudy;
    QAD_StudyFrame* myStudyFrame;
    VTKViewer_ViewFrame* myViewFrame;

    SALOME_Actor *myPreviewActor;
    vtkDataSetMapper* myMapper;
    vtkPoints* myPoints;

  public:

    TNodeSimulation(QAD_Study* theStudy):
      myStudy(theStudy),
      myStudyFrame(theStudy->getActiveStudyFrame()),
      myViewFrame(GetVtkViewFrame(theStudy->getActiveStudyFrame()))
    {
      vtkUnstructuredGrid* aGrid = vtkUnstructuredGrid::New();
  
      // Create points
      myPoints = vtkPoints::New();
      myPoints->SetNumberOfPoints( 1 );
      myPoints->SetPoint(0,0.0,0.0,0.0);
      
      // Create cells
      vtkIdList *anIdList = vtkIdList::New();
      anIdList->SetNumberOfIds( 1 );

      vtkCellArray *aCells = vtkCellArray::New();
      aCells->Allocate( 2, 0 );

      vtkUnsignedCharArray* aCellTypesArray = vtkUnsignedCharArray::New();
      aCellTypesArray->SetNumberOfComponents( 1 );
      aCellTypesArray->Allocate( 1 );
      
      anIdList->SetId( 0, 0 );
      aCells->InsertNextCell( anIdList );
      aCellTypesArray->InsertNextValue( VTK_VERTEX );
      
      vtkIntArray* aCellLocationsArray = vtkIntArray::New();
      aCellLocationsArray->SetNumberOfComponents( 1 );
      aCellLocationsArray->SetNumberOfTuples( 1 );
      
      aCells->InitTraversal();
      vtkIdType npts;
      aCellLocationsArray->SetValue( 0, aCells->GetTraversalLocation( npts ) );
  
      aGrid->SetCells( aCellTypesArray, aCellLocationsArray, aCells );

      aGrid->SetPoints( myPoints );
      aGrid->SetCells( aCellTypesArray, aCellLocationsArray,aCells );
      aCellLocationsArray->Delete();
      aCellTypesArray->Delete();
      aCells->Delete();
      anIdList->Delete(); 

      // Create and display actor
      myMapper = vtkDataSetMapper::New();
      myMapper->SetInput( aGrid );
      aGrid->Delete();

      myPreviewActor = SALOME_Actor::New();
      myPreviewActor->SetInfinitive(true);
      myPreviewActor->VisibilityOff();
      myPreviewActor->PickableOff();
      myPreviewActor->SetMapper( myMapper );

      vtkProperty* aProp = vtkProperty::New();
      aProp->SetRepresentationToPoints();

      float anRGB[3];
      anRGB[0] = GetFloat("SMESH:SettingsNodeColorRed",0)/255.;
      anRGB[1] = GetFloat("SMESH:SettingsNodeColorGreen",255)/255.;
      anRGB[2] = GetFloat("SMESH:SettingsNodeColorBlue",0)/255.;
      aProp->SetColor(anRGB[0],anRGB[1],anRGB[2]);

      float aPointSize = GetFloat("SMESH:SettingsNodesSize",3);
      aProp->SetPointSize(aPointSize);

      myPreviewActor->SetProperty( aProp );
      aProp->Delete();

      myViewFrame->AddActor( myPreviewActor );

    }


    void SetPosition(float x, float y, float z){
      myPoints->SetPoint(0,x,y,z);
      myPoints->Modified();
      SetVisibility(true);
    }


    void SetVisibility(bool theVisibility){
      myPreviewActor->SetVisibility(theVisibility);
      RepaintCurrentView();
    }


    ~TNodeSimulation(){
      if(FindVtkViewFrame(myStudy,myStudyFrame)){
	myViewFrame->RemoveActor(myPreviewActor);
      }
      myPreviewActor->Delete();

      myMapper->RemoveAllInputs();
      myMapper->Delete();

      myPoints->Delete();
    }

  };

}


//=================================================================================
// class    : SMESHGUI_NodesDlg()
// purpose  : 
//=================================================================================
SMESHGUI_NodesDlg::SMESHGUI_NodesDlg( QWidget* parent,
				      const char* name,
				      SALOME_Selection* Sel,
				      bool modal,
				      WFlags fl )
  : QDialog( parent, name, modal, WStyle_Customize | WStyle_NormalBorder | WStyle_Title | WStyle_SysMenu |
	     Qt::WDestructiveClose)
{
  mySimulation = new SMESH::TNodeSimulation(SMESH::GetActiveStudy());

  QPixmap image0(QAD_Desktop::getResourceManager()->loadPixmap( "SMESH",tr("ICON_DLG_NODE")));
  if ( !name )
    setName( "SMESHGUI_NodesDlg" );
  resize( 303, 185 ); 
  setCaption( tr( "MESH_NODE_TITLE"  ) );
  setSizeGripEnabled( TRUE );
  SMESHGUI_NodesDlgLayout = new QGridLayout( this ); 
  SMESHGUI_NodesDlgLayout->setSpacing( 6 );
  SMESHGUI_NodesDlgLayout->setMargin( 11 );

  /***************************************************************/
  GroupButtons = new QGroupBox( this, "GroupButtons" );
  GroupButtons->setGeometry( QRect( 10, 10, 281, 48 ) ); 
  GroupButtons->setTitle( tr( ""  ) );
  GroupButtons->setColumnLayout(0, Qt::Vertical );
  GroupButtons->layout()->setSpacing( 0 );
  GroupButtons->layout()->setMargin( 0 );
  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_NodesDlgLayout->addWidget( GroupButtons, 2, 0 );

  /***************************************************************/
  GroupConstructors = new QButtonGroup( this, "GroupConstructors" );
  GroupConstructors->setTitle( tr( "MESH_NODE"  ) );
  GroupConstructors->setExclusive( TRUE );
  GroupConstructors->setColumnLayout(0, Qt::Vertical );
  GroupConstructors->layout()->setSpacing( 0 );
  GroupConstructors->layout()->setMargin( 0 );
  GroupConstructorsLayout = new QGridLayout( GroupConstructors->layout() );
  GroupConstructorsLayout->setAlignment( Qt::AlignTop );
  GroupConstructorsLayout->setSpacing( 6 );
  GroupConstructorsLayout->setMargin( 11 );
  Constructor1 = new QRadioButton( GroupConstructors, "Constructor1" );
  Constructor1->setText( tr( ""  ) );
  Constructor1->setPixmap( image0 );
  Constructor1->setChecked( TRUE );
  GroupConstructorsLayout->addWidget( Constructor1, 0, 0 );
  QSpacerItem* spacer_2 = new QSpacerItem( 20, 20, QSizePolicy::Expanding, QSizePolicy::Minimum );
  GroupConstructorsLayout->addItem( spacer_2, 0, 1 );
  SMESHGUI_NodesDlgLayout->addWidget( GroupConstructors, 0, 0 );

  /***************************************************************/
  GroupCoordinates = new QGroupBox( this, "GroupCoordinates" );
  GroupCoordinates->setTitle( tr( "SMESH_COORDINATES"  ) );
  GroupCoordinates->setColumnLayout(0, Qt::Vertical );
  GroupCoordinates->layout()->setSpacing( 0 );
  GroupCoordinates->layout()->setMargin( 0 );
  GroupCoordinatesLayout = new QGridLayout( GroupCoordinates->layout() );
  GroupCoordinatesLayout->setAlignment( Qt::AlignTop );
  GroupCoordinatesLayout->setSpacing( 6 );
  GroupCoordinatesLayout->setMargin( 11 );
  TextLabel_X = new QLabel( GroupCoordinates, "TextLabel_X" );
  TextLabel_X->setText( tr( "SMESH_X"  ) );
  GroupCoordinatesLayout->addWidget( TextLabel_X, 0, 0 );
  TextLabel_Y = new QLabel( GroupCoordinates, "TextLabel_Y" );
  TextLabel_Y->setText( tr( "SMESH_Y"  ) );
  GroupCoordinatesLayout->addWidget( TextLabel_Y, 0, 2 );
  
  TextLabel_Z = new QLabel( GroupCoordinates, "TextLabel_Z" );
  TextLabel_Z->setText( tr( "SMESH_Z"  ) );
  GroupCoordinatesLayout->addWidget( TextLabel_Z, 0, 4 );
  
  SpinBox_X = new SMESHGUI_SpinBox( GroupCoordinates, "SpinBox_X" ) ;
  GroupCoordinatesLayout->addWidget( SpinBox_X, 0, 1 );

  SpinBox_Y = new SMESHGUI_SpinBox( GroupCoordinates, "SpinBox_Y" ) ;
  GroupCoordinatesLayout->addWidget( SpinBox_Y, 0, 3 );
 
  SpinBox_Z = new SMESHGUI_SpinBox( GroupCoordinates, "SpinBox_Z" ) ;
  GroupCoordinatesLayout->addWidget( SpinBox_Z, 0, 5 );

  SMESHGUI_NodesDlgLayout->addWidget( GroupCoordinates, 1, 0 );
 
  /* Initialisation and display */
  Init(Sel) ;
}


//=======================================================================
// function : ~SMESHGUI_NodesDlg()
// purpose  : Destructor
//=======================================================================
SMESHGUI_NodesDlg::~SMESHGUI_NodesDlg()
{
  delete mySimulation;
}


//=================================================================================
// function : Init()
// purpose  :
//=================================================================================
void SMESHGUI_NodesDlg::Init(SALOME_Selection* Sel)
{
  /* Get setting of step value from file configuration */
  double step ;
  // QString St = QAD_CONFIG->getSetting( "xxxxxxxxxxxxx" ) ;  TODO
  // step = St.toDouble() ;                                    TODO
  step = 25.0 ;
  
  /* min, max, step and decimals for spin boxes */
  SpinBox_X->RangeStepAndValidator( -999.999, +999.999, step, 3 ) ;
  SpinBox_Y->RangeStepAndValidator( -999.999, +999.999, step, 3 ) ;
  SpinBox_Z->RangeStepAndValidator( -999.999, +999.999, step, 3 ) ;  
  SpinBox_X->SetValue( 0.0 ) ;
  SpinBox_Y->SetValue( 0.0 ) ;
  SpinBox_Z->SetValue( 0.0 ) ;
  
  mySelection = Sel ;
  myMeshGUI = SMESHGUI::GetSMESHGUI() ;   
  myMeshGUI->SetActiveDialogBox( (QDialog*)this ) ;
  
  /* signals and slots connections */
  connect( buttonOk, SIGNAL( clicked() ), this, SLOT( ClickOnOk() ) );
  connect( buttonCancel, SIGNAL( clicked() ), this, SLOT( ClickOnCancel() ) );
  connect( buttonApply, SIGNAL( clicked() ), this, SLOT(ClickOnApply() ) );
  
  connect( SpinBox_X, SIGNAL ( valueChanged(double) ), SLOT( ValueChangedInSpinBox(double) )) ;
  connect( SpinBox_Y, SIGNAL ( valueChanged(double) ), SLOT( ValueChangedInSpinBox(double) )) ;
  connect( SpinBox_Z, SIGNAL ( valueChanged(double) ), SLOT( ValueChangedInSpinBox(double) )) ;

  connect( mySelection, SIGNAL( currentSelectionChanged() ), SLOT( SelectionIntoArgument() ));
  connect( myMeshGUI, SIGNAL ( SignalDeactivateActiveDialog() ), SLOT( DeactivateActiveDialog() )) ;
  /* to close dialog if study frame change */
  connect( myMeshGUI, SIGNAL ( SignalStudyFrameChanged() ), SLOT( ClickOnCancel() ) ) ;
 
  /* Move widget on the botton right corner of main widget */
  int x, y ;
  myMeshGUI->DefineDlgPosition( this, x, y ) ;
  this->move( x, y ) ;
  this->show() ;

  // set selection mode
  SMESH::SetPointRepresentation(true);
  QAD_Application::getDesktop()->SetSelectionMode( NodeSelection, true );

  SelectionIntoArgument();
}

//=================================================================================
// function : ValueChangedInSpinBox()
// purpose  :
//=================================================================================
void SMESHGUI_NodesDlg::ValueChangedInSpinBox( double newValue )
{
  if(!myMesh->_is_nil()){
    double vx = SpinBox_X->GetValue() ;
    double vy = SpinBox_Y->GetValue() ;
    double vz = SpinBox_Z->GetValue() ;

    mySimulation->SetPosition(vx,vy,vz);
  }
  return ;
}

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

//=======================================================================
// function : ClickOnApply()
// purpose  :
//=======================================================================
bool SMESHGUI_NodesDlg::ClickOnApply()
{
  if (myMeshGUI->ActiveStudyLocked())
    return false;

  if ( myMesh->_is_nil() ) {
    QAD_MessageBox::warn1(QAD_Application::getDesktop(),
                          tr("SMESH_WRN_WARNING"),
                          tr("MESH_IS_NOT_SELECTED"),
                          tr("SMESH_BUT_OK"));
    return false;
  }
                              
  /* Recup args and call method */
  double x = SpinBox_X->GetValue() ;
  double y = SpinBox_Y->GetValue() ;
  double z = SpinBox_Z->GetValue() ;
  mySimulation->SetVisibility(false);
  SMESH::AddNode(myMesh,x,y,z) ; 
  SMESH::SetPointRepresentation(true);

  // select myMesh
  if ( mySelection->IObjectCount() != 1 ) {
    if(VTKViewer_ViewFrame* aViewFrame = SMESH::GetCurrentVtkView()) {
      vtkActorCollection *aCollection = aViewFrame->getRenderer()->GetActors();
      aCollection->InitTraversal();
      while(vtkActor *anAct = aCollection->GetNextActor()){
        if(SMESH_Actor *anActor = dynamic_cast<SMESH_Actor*>(anAct))
          if(anActor->hasIO())
            if(SMESH_MeshObj *aMeshObj = dynamic_cast<SMESH_MeshObj*>(anActor->GetObject().get()))
              if(myMesh->_is_equivalent( aMeshObj->GetMeshServer() ))
              {
                mySelection->ClearIObjects();
                mySelection->AddIObject( anActor->getIO(), false );
                break;
              }
      }
    }
  }
  return true;
}


//=======================================================================
// function : ClickOnCancel()
// purpose  :
//=======================================================================
void SMESHGUI_NodesDlg::ClickOnCancel()
{
  mySelection->ClearIObjects();
  mySimulation->SetVisibility(false);
  SMESH::SetPointRepresentation(false);
  QAD_Application::getDesktop()->SetSelectionMode( ActorSelection );
  disconnect( mySelection, 0, this, 0 );
  myMeshGUI->ResetState();
  reject() ;
  return ;
}


//=================================================================================
// function : SelectionIntoArgument()
// purpose  : Called when selection as changed or other case
//=================================================================================
void SMESHGUI_NodesDlg::SelectionIntoArgument()
{
  if ( !GroupConstructors->isEnabled() )
    return;

  mySimulation->SetVisibility(false);
  SMESH::SetPointRepresentation(true);

  if(mySelection->IObjectCount() == 1){
    Handle(SALOME_InteractiveObject) anIO = mySelection->firstIObject();
    if(anIO->hasEntry()){
      myMesh = SMESH::GetMeshByIO(anIO);
      if(myMesh->_is_nil()) return;
      QString aText;
      if(SMESH::GetNameOfSelectedNodes( mySelection, aText ) == 1){
	if(SMESH_Actor* anActor = SMESH::FindActorByObject(myMesh.in())){
	  if(SMDS_Mesh* aMesh = anActor->GetObject()->GetMesh()){
	    if(const SMDS_MeshNode* aNode = aMesh->FindNode(aText.toInt())){
	      SpinBox_X->SetValue( aNode->X() );
	      SpinBox_Y->SetValue( aNode->Y() ) ;
	      SpinBox_Z->SetValue( aNode->Z() ) ;
	      }
	  }
	}
      }
      mySimulation->SetPosition(SpinBox_X->GetValue(),
				SpinBox_Y->GetValue(),
				SpinBox_Z->GetValue());
    }
  }
}


//=======================================================================
// function : closeEvent()
// purpose  :
//=======================================================================
void SMESHGUI_NodesDlg::closeEvent(QCloseEvent* e)
{
  this->ClickOnCancel() ; /* same than click on cancel button */
}

//=======================================================================
//function : hideEvent
//purpose  : caused by ESC key
//=======================================================================

void SMESHGUI_NodesDlg::hideEvent ( QHideEvent * e )
{
  if ( !isMinimized() )
    ClickOnCancel();
}

//=================================================================================
// function : enterEvent()
// purpose  : to reactivate this dialog box when mouse enter onto the window
//=================================================================================
void SMESHGUI_NodesDlg::enterEvent( QEvent* e)
{
  if ( !GroupConstructors->isEnabled() )
    ActivateThisDialog() ;
}


//=================================================================================
// function : DeactivateActiveDialog()
// purpose  : public slot to deactivate if active
//=================================================================================
void SMESHGUI_NodesDlg::DeactivateActiveDialog()
{
  if ( GroupConstructors->isEnabled() ) {
    GroupConstructors->setEnabled(false) ;
    GroupCoordinates->setEnabled(false) ;
    GroupButtons->setEnabled(false) ;
    mySimulation->SetVisibility(false) ;
    myMeshGUI->ResetState() ;    
    myMeshGUI->SetActiveDialogBox(0) ;
  }
}


//=================================================================================
// function : ActivateThisDialog()
// purpose  :
//=================================================================================
void SMESHGUI_NodesDlg::ActivateThisDialog( )
{
  myMeshGUI->EmitSignalDeactivateDialog() ;
  GroupConstructors->setEnabled(true) ;
  GroupCoordinates->setEnabled(true) ;
  GroupButtons->setEnabled(true) ;

  SMESH::SetPointRepresentation(true);
  QAD_Application::getDesktop()->SetSelectionMode( NodeSelection, true );

  SelectionIntoArgument();
}