//  SMESH SMESHGUI : GUI for SMESH component
//
//  Copyright (C) 2003  CEA
// 
//  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.org
//
//
//
//  File   : SMESHGUI_CreateHypothesesDlg.cxx
//  Author : Julia DOROVSKIKH
//  Module : SMESH
//  $Header$

// QT Includes
#include <qbuttongroup.h>
#include <qgroupbox.h>
#include <qpushbutton.h>
#include <qlayout.h>
#include <qlistview.h>
#include <qheader.h>

#include "QAD_Application.h"
#include "QAD_Desktop.h"

#include "SALOME_ListIteratorOfListIO.hxx"

#include "SMESHGUI_CreateHypothesesDlg.h"
#include "SMESHGUI_HypothesesUtils.h"
#include "SMESHGUI_Hypotheses.h"
#include "SMESHGUI_Utils.h"
#include "SMESHGUI.h"

#include "utilities.h"

using namespace std;

//=================================================================================
// class    : SMESHGUI_CreateHypothesesDlg()
// purpose  : Constructs a SMESHGUI_CreateHypothesesDlg 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.
//=================================================================================
SMESHGUI_CreateHypothesesDlg::SMESHGUI_CreateHypothesesDlg (QWidget* parent,
                                                            const char* name,
                                                            bool modal,
                                                            bool isAlgo)
     : QDialog( parent, name, modal, WStyle_Customize | WStyle_NormalBorder | WStyle_Title | WStyle_SysMenu | WDestructiveClose ),
       myIsAlgo( isAlgo )
{
  MESSAGE("SMESHGUI_CreateHypothesesDlg");

  if ( !name )
    setName( "SMESHGUI_CreateHypothesesDlg" );
  setCaption( isAlgo ? tr( "SMESH_CREATE_ALGORITHMS"  ) : tr( "SMESH_CREATE_HYPOTHESES"  ) );
  setSizeGripEnabled( TRUE );

  QGridLayout* SMESHGUI_CreateHypothesesDlgLayout = new QGridLayout( this ); 
  SMESHGUI_CreateHypothesesDlgLayout->setSpacing( 6 );
  SMESHGUI_CreateHypothesesDlgLayout->setMargin( 11 );

  /***************************************************************/
  GroupAlgorithms = new QGroupBox( this, "GroupAlgorithms" );
  GroupAlgorithms->setTitle( isAlgo ? tr("SMESH_AVAILABLE_ALGORITHMS") : tr("SMESH_AVAILABLE_HYPOTHESES") );
  GroupAlgorithms->setColumnLayout(0, Qt::Vertical );
  GroupAlgorithms->layout()->setSpacing( 0 );
  GroupAlgorithms->layout()->setMargin( 0 );

  QGridLayout* hypLayout = new QGridLayout( GroupAlgorithms->layout() );
  hypLayout->setGeometry( QRect( 12, 18, 139, 250 ) ); 
  hypLayout->setAlignment( Qt::AlignTop );
  hypLayout->setSpacing( 6 );
  hypLayout->setMargin( 11 );

  ListAlgoDefinition = new QListView( GroupAlgorithms, "ListAlgoDefinition" );
  ListAlgoDefinition->setMinimumSize( 400, 200 );
  ListAlgoDefinition->addColumn("");
  ListAlgoDefinition->header()->hide();
  ListAlgoDefinition->setSelectionMode(QListView::Single);
  ListAlgoDefinition->setResizeMode(QListView::AllColumns);
  ListAlgoDefinition->setRootIsDecorated( true );

  hypLayout->addWidget( ListAlgoDefinition, 0, 0 );
  SMESHGUI_CreateHypothesesDlgLayout->addWidget( GroupAlgorithms, 0, 0 );

  /***************************************************************/
  GroupButtons = new QGroupBox( this, "GroupButtons" );
  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 );

  buttonApply = new QPushButton( GroupButtons, "buttonApply" );
  buttonApply->setText( tr( "SMESH_BUT_CREATE"  ) );
  buttonApply->setAutoDefault( TRUE );
  buttonApply->setDefault( FALSE );
  buttonApply->setEnabled( FALSE ) ;
  GroupButtonsLayout->addWidget( buttonApply, 0, 1 );

  QSpacerItem* spacer_9 = new QSpacerItem( 20, 20, QSizePolicy::Expanding, QSizePolicy::Minimum );
  GroupButtonsLayout->addItem( spacer_9, 0, 2 );

  buttonCancel = new QPushButton( GroupButtons, "buttonCancel" );
  buttonCancel->setText( tr( "SMESH_BUT_CLOSE"  ) );
  buttonCancel->setAutoDefault( TRUE );
  buttonCancel->setDefault( TRUE );
  buttonCancel->setEnabled( TRUE ) ;
  GroupButtonsLayout->addWidget( buttonCancel, 0, 3 );

  SMESHGUI_CreateHypothesesDlgLayout->addWidget( GroupButtons, 1, 0 );
  /***************************************************************/

  Init();
}

//=================================================================================
// function : ~SMESHGUI_CreateHypothesesDlg()
// purpose  : Destroys the object and frees any allocated resources
//=================================================================================
SMESHGUI_CreateHypothesesDlg::~SMESHGUI_CreateHypothesesDlg()
{
    // no need to delete child widgets, Qt does it all for us
}

//=================================================================================
// function : Init()
// purpose  :
//=================================================================================
void SMESHGUI_CreateHypothesesDlg::Init()
{
  mySMESHGUI = SMESHGUI::GetSMESHGUI() ;
  mySMESHGUI->SetActiveDialogBox( (QDialog*)this ) ;

  InitAlgoDefinition();

  /* signals and slots connections */
  connect( buttonCancel, SIGNAL( clicked() ), this, SLOT( ClickOnCancel() ) ) ;
  connect( buttonApply , SIGNAL( clicked() ), this, SLOT( ClickOnApply() ) ) ;

//  connect( mySMESHGUI, SIGNAL ( SignalDeactivateActiveDialog() ), this, SLOT( DeactivateActiveDialog() ) ) ;
  connect( mySMESHGUI, SIGNAL ( SignalCloseAllDialogs() ), this, SLOT( ClickOnCancel() ) ) ;
 
  connect( ListAlgoDefinition, SIGNAL( selectionChanged() ), this, SLOT( onSelectionChanged() ) );
  connect( ListAlgoDefinition, SIGNAL( doubleClicked(QListViewItem*) ),    this, SLOT( onDoubleClicked(QListViewItem*) ) );

  int x, y ;
  mySMESHGUI->DefineDlgPosition( this, x, y ) ;
  this->move( x, y ) ;
  this->show() ; 
}

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

//=================================================================================
// function : ClickOnApply()
// purpose  :
//=================================================================================
void SMESHGUI_CreateHypothesesDlg::ClickOnApply()
{
  if (mySMESHGUI->ActiveStudyLocked())
    return;
  QListViewItem* item = ListAlgoDefinition->selectedItem();
  if ( !item )
    return;
  QString aHypType = item->text( 1 );
  MESSAGE("Apply " << aHypType);
  char* sHypType = (char*)aHypType.latin1();

  HypothesisData* aHypData = SMESH::GetHypothesisData(sHypType);
  if ( !aHypData ) 
    return;
  QString aClientLibName = aHypData->ClientLibName;
  MESSAGE("Client lib name = " << aClientLibName);

  if (aClientLibName == "")
  {
    // Call hypothesis creation server method (without GUI)
    QString aHypName = aHypData->Label;
    SMESH::CreateHypothesis(sHypType, aHypName, myIsAlgo);
  }
  else
  {
    // Get hypotheses creator client (GUI)
    SMESHGUI_GenericHypothesisCreator* aCreator =
      SMESH::GetHypothesisCreator(sHypType);

    // Create hypothesis/algorithm
    aCreator->CreateHypothesis(myIsAlgo, this);
  }

//  buttonApply->setEnabled(FALSE);
  return;
}

//=================================================================================
// function : ActivateThisDialog()
// purpose  :
//=================================================================================
void SMESHGUI_CreateHypothesesDlg::ActivateThisDialog()
{
  mySMESHGUI->EmitSignalDeactivateDialog() ;   
  GroupButtons->setEnabled(true) ;
  return ;
}

//=================================================================================
// function : enterEvent()
// purpose  :
//=================================================================================
void SMESHGUI_CreateHypothesesDlg::enterEvent(QEvent* e)
{
  ActivateThisDialog() ;
  return ;
}

//=================================================================================
// function : closeEvent()
// purpose  :
//=================================================================================
void SMESHGUI_CreateHypothesesDlg::closeEvent( QCloseEvent* e )
{
  mySMESHGUI->ResetState();
  QDialog::closeEvent( e );
}

//=================================================================================
// function : onSelectionChanged()
// purpose  :
//=================================================================================
void SMESHGUI_CreateHypothesesDlg::onSelectionChanged()
{
  QListViewItem* item = ListAlgoDefinition->selectedItem();
  buttonApply->setEnabled( item && item->depth() > 0 ) ;
}

//=================================================================================
// function : onDoubleClicked()
// purpose  :
//=================================================================================
void SMESHGUI_CreateHypothesesDlg::onDoubleClicked(QListViewItem* i)
{
  if ( i && i->depth() > 0 )
    this->ClickOnApply();
}

//=================================================================================
// function : InitAlgoDefinition()
// purpose  :
//=================================================================================
void SMESHGUI_CreateHypothesesDlg::InitAlgoDefinition()
{
  ListAlgoDefinition->clear();
  QStringList HypList = SMESH::GetAvailableHypotheses(myIsAlgo);
  for ( int i = 0; i < HypList.count(); ++i ) {
    HypothesisData* aHypData = SMESH::GetHypothesisData( HypList[i] );
    QListViewItem* parentItem = 0;
    QListViewItem* childItem = ListAlgoDefinition->firstChild();
    while ( childItem ) {
      if ( childItem->text(0) == aHypData->PluginName ) {
	parentItem = childItem;
	break;
      }
      childItem = childItem->nextSibling();
    }
    if ( !parentItem ) 
      parentItem = new QListViewItem( ListAlgoDefinition, aHypData->PluginName );
    parentItem->setOpen( true );
    QListViewItem* aItem = new QListViewItem( parentItem, aHypData->Label, HypList[i] );
    QPixmap aPixMap (QAD_Desktop::getResourceManager()->loadPixmap
                     ("SMESH", tr(aHypData->IconId)));
    if ( !aPixMap.isNull() )
      aItem->setPixmap( 0, aPixMap );
  }
}