// GEOM GEOMGUI : GUI for Geometry 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.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
// File   : MeasureGUI_DistanceDlg.cxx
// Author : Nicolas REJNERI, Open CASCADE S.A.S.
//

#include "MeasureGUI_DistanceDlg.h"
#include "MeasureGUI_Widgets.h"

#include <DlgRef.h>
#include <GEOMBase.h>
#include <GeometryGUI.h>

#include <SUIT_Session.h>
#include <SUIT_Desktop.h>
#include <SUIT_ResourceMgr.h>
#include <SUIT_ViewWindow.h>
#include <SUIT_ViewManager.h>
#include <SOCC_Prs.h>
#include <SOCC_ViewModel.h>
#include <SalomeApp_Tools.h>
#include <SalomeApp_Application.h>
#include <LightApp_SelectionMgr.h>

// OCCT Includes
#include <Geom_Plane.hxx>
#include <AIS_LengthDimension.hxx>
#include <BRepBuilderAPI_MakeEdge.hxx>
#include <BRepBuilderAPI_MakeVertex.hxx>
#include <gce_MakePln.hxx>
#include <Precision.hxx>

//=================================================================================
// class    : MeasureGUI_DistanceDlg()
// purpose  : Constructs a MeasureGUI_DistanceDlg which is a child of 'parent', with the
//            name 'name' and widget flags set to 'f'.
//            The dialog will by default be modeless, unless you set 'modal' to
//            true to construct a modal dialog.
//=================================================================================
MeasureGUI_DistanceDlg::MeasureGUI_DistanceDlg (GeometryGUI* GUI, QWidget* parent)
  : MeasureGUI_Skeleton(GUI, parent)
{
  SUIT_ResourceMgr* aResMgr = SUIT_Session::session()->resourceMgr();
  QPixmap image0 (aResMgr->loadPixmap("GEOM", tr("ICON_DLG_MINDIST")));
  QPixmap image1 (aResMgr->loadPixmap("GEOM", tr("ICON_SELECT")));

  setWindowTitle(tr("GEOM_MINDIST_TITLE"));

  /***************************************************************/
  mainFrame()->GroupConstructors->setTitle(tr("GEOM_DISTANCE"));
  mainFrame()->RadioButton1->setIcon(image0);

  myGrp = new MeasureGUI_2Sel4LineEdit(centralWidget());
  myGrp->GroupBox1->setTitle(tr("GEOM_MINDIST_OBJ"));
  myGrp->TextLabel1->setText(tr("GEOM_OBJECT_I").arg("1"));
  myGrp->TextLabel2->setText(tr("GEOM_OBJECT_I").arg("2"));
  myGrp->TextLabel3->setText(tr("GEOM_LENGTH"));
  myGrp->TextLabel4->setText(tr("GEOM_DX"));
  myGrp->TextLabel5->setText(tr("GEOM_DY"));
  myGrp->TextLabel6->setText(tr("GEOM_DZ"));
  myGrp->LineEdit3->setReadOnly(true);
  myGrp->PushButton1->setIcon(image1);
  myGrp->PushButton2->setIcon(image1);
  myGrp->LineEdit1->setReadOnly(true);
  myGrp->LineEdit2->setReadOnly(true);
  myGrp->LineEdit4->setReadOnly(true);
  myGrp->LineEdit5->setReadOnly(true);
  myGrp->LineEdit6->setReadOnly(true);

  QVBoxLayout* layout = new QVBoxLayout(centralWidget());
  layout->setMargin(0); layout->setSpacing(6);
  layout->addWidget(myGrp);
  /***************************************************************/

  myHelpFileName = "using_measurement_tools_page.html#min_distance_anchor";

  // Initialisation
  Init();
}

//=================================================================================
// function : ~MeasureGUI_DistanceDlg()
// purpose  : Destroys the object and frees any allocated resources
//=================================================================================
MeasureGUI_DistanceDlg::~MeasureGUI_DistanceDlg()
{
}

//=================================================================================
// function : Init()
// purpose  :
//=================================================================================
void MeasureGUI_DistanceDlg::Init()
{
  // init variables
  myGrp->LineEdit1->setText("");
  myGrp->LineEdit2->setText("");
  myObj = myObj2 = GEOM::GEOM_Object::_nil();

  mySelBtn   = myGrp->PushButton1;
  mySelEdit  = myGrp->LineEdit1;

  myEditCurrentArgument = myGrp->LineEdit1;

  // signals and slots connections
  connect(myGrp->LineEdit2, SIGNAL(returnPressed()), this, SLOT(LineEditReturnPressed()));
  connect(myGrp->PushButton2, SIGNAL(clicked()), this, SLOT(SetEditCurrentArgument()));

  MeasureGUI_Skeleton::Init();
}

//=================================================================================
// function : SelectionIntoArgument()
// purpose  : Called when selection has changed
//=================================================================================
void MeasureGUI_DistanceDlg::SelectionIntoArgument()
{
  LightApp_SelectionMgr* aSelMgr = myGeomGUI->getApp()->selectionMgr();
  SALOME_ListIO aSelList;
  aSelMgr->selectedObjects(aSelList);

  GEOM::GEOM_Object_var aSelectedObject = GEOM::GEOM_Object::_nil();

  if (aSelList.Extent() > 0) {
    Standard_Boolean testResult = Standard_False;
    aSelectedObject = GEOMBase::ConvertIOinGEOMObject(aSelList.First(), testResult);
    if (!testResult)
      aSelectedObject = GEOM::GEOM_Object::_nil();
  }

  // clear selection
  disconnect(myGeomGUI->getApp()->selectionMgr(), 0, this, 0);
  myGeomGUI->getApp()->selectionMgr()->clearSelected();
  connect(myGeomGUI->getApp()->selectionMgr(), SIGNAL(currentSelectionChanged()),
          this, SLOT(SelectionIntoArgument()));

  if (myEditCurrentArgument == myGrp->LineEdit1) {
    myObj = aSelectedObject;
    if (!myObj->_is_nil() && myObj2->_is_nil())
      myGrp->PushButton2->click();
  }
  else {
    myObj2 = aSelectedObject;
    if (!myObj2->_is_nil() && myObj->_is_nil())
      myGrp->PushButton1->click();
  }

  processObject();
}

//=================================================================================
// function : processObject()
// purpose  : Fill dialogs fields in accordance with myObj and myObj2
//=================================================================================
void MeasureGUI_DistanceDlg::processObject()
{
  myGrp->LineEdit1->setText(!myObj->_is_nil()  ? GEOMBase::GetName(myObj ) : "");
  myGrp->LineEdit2->setText(!myObj2->_is_nil() ? GEOMBase::GetName(myObj2) : "");

  gp_Pnt aPnt1, aPnt2;
  double aDist = 0.;
  if (getParameters(aDist, aPnt1, aPnt2)) {
    myGrp->LineEdit3->setText(DlgRef::PrintDoubleValue(aDist));

    gp_XYZ aVec = aPnt2.XYZ() - aPnt1.XYZ();
    myGrp->LineEdit4->setText(DlgRef::PrintDoubleValue(aVec.X()));
    myGrp->LineEdit5->setText(DlgRef::PrintDoubleValue(aVec.Y()));
    myGrp->LineEdit6->setText(DlgRef::PrintDoubleValue(aVec.Z()));

    redisplayPreview();
  }
  else {
    myGrp->LineEdit3->setText("");
    myGrp->LineEdit4->setText("");
    myGrp->LineEdit5->setText("");
    myGrp->LineEdit6->setText("");
    erasePreview();
  }
}

//=================================================================================
// function : getParameters()
// purpose  : Get distance between objects
//=================================================================================
bool MeasureGUI_DistanceDlg::getParameters (double& theDistance,
                                            gp_Pnt& thePnt1,
                                            gp_Pnt& thePnt2)
{
  QString msg;
  if (isValid(msg)) {
    try {
      double x1, y1, z1, x2, y2, z2;
      theDistance = GEOM::GEOM_IMeasureOperations::_narrow(getOperation())->
        GetMinDistance(myObj, myObj2, x1, y1, z1, x2, y2, z2);

      thePnt1.SetCoord(x1, y1, z1);
      thePnt2.SetCoord(x2, y2, z2);
    }
    catch(const SALOME::SALOME_Exception& e) {
      SalomeApp_Tools::QtCatchCorbaException(e);
      return false;
    }

    return getOperation()->IsDone();
  }

  return false;
}

//=================================================================================
// function : SetEditCurrentArgument()
// purpose  :
//=================================================================================
void MeasureGUI_DistanceDlg::SetEditCurrentArgument()
{
  QPushButton* send = (QPushButton*)sender();

  if (send == myGrp->PushButton1) {
    myEditCurrentArgument = myGrp->LineEdit1;

    myGrp->PushButton2->setDown(false);
    myGrp->LineEdit2->setEnabled(false);
  }
  else {
    myEditCurrentArgument = myGrp->LineEdit2;

    myGrp->PushButton1->setDown(false);
    myGrp->LineEdit1->setEnabled(false);
  }

  // enable line edit
  myEditCurrentArgument->setEnabled(true);
  myEditCurrentArgument->setFocus();
  // after setFocus(), because it will be setDown(false) when loses focus
  send->setDown(true);

  // seems we need it only to avoid preview disappearing, caused by selection mode change
  redisplayPreview();
}

//=================================================================================
// function : LineEditReturnPressed()
// purpose  :
//=================================================================================
void MeasureGUI_DistanceDlg::LineEditReturnPressed()
{
  QLineEdit* send = (QLineEdit*)sender();

  if (send == myGrp->LineEdit1 || send == myGrp->LineEdit2) {
    myEditCurrentArgument = send;

    LightApp_SelectionMgr* aSelMgr = myGeomGUI->getApp()->selectionMgr();
    SALOME_ListIO aSelList;
    aSelMgr->selectedObjects(aSelList);

    if (GEOMBase::SelectionByNameInDialogs(this, myGrp->LineEdit1->text(), aSelList))
      myGrp->LineEdit1->setText(myGrp->LineEdit1->text());
  }
}

//=================================================================================
// function : buildPrs()
// purpose  :
//=================================================================================
SALOME_Prs* MeasureGUI_DistanceDlg::buildPrs()
{
  double aDist = 0.;
  gp_Pnt aPnt1(0, 0, 0), aPnt2(0, 0, 0);

  SUIT_ViewWindow* vw = SUIT_Session::session()->activeApplication()->desktop()->activeWindow();

  if (myObj->_is_nil() || myObj2->_is_nil() ||
       !getParameters(aDist, aPnt1, aPnt2) ||
       vw->getViewManager()->getType() != OCCViewer_Viewer::Type())
    return 0;

  try
  {
    if (aDist <= 1.e-9) {
      BRepBuilderAPI_MakeVertex aMaker(aPnt1);
      return getDisplayer()->BuildPrs(aMaker.Vertex());
    }
    else {
      BRepBuilderAPI_MakeEdge MakeEdge(aPnt1, aPnt2);
      TopoDS_Vertex aVert1 = BRepBuilderAPI_MakeVertex(aPnt1);
      TopoDS_Vertex aVert2 = BRepBuilderAPI_MakeVertex(aPnt2);

      QString aLabel;
      aLabel.sprintf("%.1f", aDist);

      gp_Pnt aPnt3((aPnt1.X() + aPnt2.X()) / 2,
                    (aPnt1.Y() + aPnt2.Y()) / 2,
                    (aPnt1.Z() + aPnt2.Z()) / 2 + 100);

      gp_Vec va(aPnt3, aPnt1);
      gp_Vec vb(aPnt3, aPnt2);

      if (va.IsParallel(vb, Precision::Angular())) {
        aPnt3.SetY((aPnt1.Y() + aPnt2.Y()) / 2 + 100);
        aPnt3.SetZ((aPnt1.Z() + aPnt2.Z()) / 2);
      }

      gce_MakePln gce_MP(aPnt1, aPnt2, aPnt3);
      Handle(Geom_Plane) P = new Geom_Plane(gce_MP.Value());

      Handle(AIS_LengthDimension) anIO = new AIS_LengthDimension(
        aVert1, aVert2, P, aDist, TCollection_ExtendedString((Standard_CString)aLabel.toLatin1().constData()));
      anIO->SetArrowSize(aDist/20);

      SOCC_Prs* aPrs = dynamic_cast<SOCC_Prs*>(((SOCC_Viewer*)(vw->getViewManager()->getViewModel()))->CreatePrs(0));

      if (aPrs)
        aPrs->AddObject(anIO);

      return aPrs;
    }
  }
  catch(Standard_Failure) {
    return 0;
  }
}

//=================================================================================
// function : isValid()
// purpose  :
//=================================================================================
bool MeasureGUI_DistanceDlg::isValid (QString& msg)
{
  return MeasureGUI_Skeleton::isValid(msg) && !myObj2->_is_nil();
}